libcitadel/lib/stringbuf.c

   1 /*
   2  * Copyright (c) 1987-2011 by the citadel.org team
   3  *
   4  * This program is open source software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License as published by
   6  * the Free Software Foundation; either version 3 of the License, or
   7  * (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write to the Free Software
  16  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  17  */
  18
  19 #define _GNU_SOURCE
  20 #include "sysdep.h"
  21 #include <ctype.h>
  22 #include <errno.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25 #include <string.h>
  26 #include <stdio.h>
  27 #include <sys/select.h>
  28 #include <fcntl.h>
  29 #include <sys/types.h>
  30 #define SHOW_ME_VAPPEND_PRINTF
  31 #include <stdarg.h>
  32
  33 #include "libcitadel.h"
  34
  35 #ifdef HAVE_ICONV
  36 #include <iconv.h>
  37 #endif
  38
  39 #ifdef HAVE_BACKTRACE
  40 #include <execinfo.h>
  41 #endif
  42
  43 #ifdef UNDEF_MEMCPY
  44 #undef memcpy
  45 #endif
  46
  47 #ifdef HAVE_ZLIB
  48 #include <zlib.h>
  49 int ZEXPORT compress_gzip(Bytef * dest, size_t * destLen,
  50                           const Bytef * source, uLong sourceLen, int level);
  51 #endif
  52 int BaseStrBufSize = 64;
  53 int EnableSplice = 0;
  54
  55 const char *StrBufNOTNULL = ((char*) NULL) - 1;
  56
  57 const char HexList[256][3] = {
  58         "00","01","02","03","04","05","06","07","08","09","0A","0B","0C","0D","0E","0F",
  59         "10","11","12","13","14","15","16","17","18","19","1A","1B","1C","1D","1E","1F",
  60         "20","21","22","23","24","25","26","27","28","29","2A","2B","2C","2D","2E","2F",
  61         "30","31","32","33","34","35","36","37","38","39","3A","3B","3C","3D","3E","3F",
  62         "40","41","42","43","44","45","46","47","48","49","4A","4B","4C","4D","4E","4F",
  63         "50","51","52","53","54","55","56","57","58","59","5A","5B","5C","5D","5E","5F",
  64         "60","61","62","63","64","65","66","67","68","69","6A","6B","6C","6D","6E","6F",
  65         "70","71","72","73","74","75","76","77","78","79","7A","7B","7C","7D","7E","7F",
  66         "80","81","82","83","84","85","86","87","88","89","8A","8B","8C","8D","8E","8F",
  67         "90","91","92","93","94","95","96","97","98","99","9A","9B","9C","9D","9E","9F",
  68         "A0","A1","A2","A3","A4","A5","A6","A7","A8","A9","AA","AB","AC","AD","AE","AF",
  69         "B0","B1","B2","B3","B4","B5","B6","B7","B8","B9","BA","BB","BC","BD","BE","BF",
  70         "C0","C1","C2","C3","C4","C5","C6","C7","C8","C9","CA","CB","CC","CD","CE","CF",
  71         "D0","D1","D2","D3","D4","D5","D6","D7","D8","D9","DA","DB","DC","DD","DE","DF",
  72         "E0","E1","E2","E3","E4","E5","E6","E7","E8","E9","EA","EB","EC","ED","EE","EF",
  73         "F0","F1","F2","F3","F4","F5","F6","F7","F8","F9","FA","FB","FC","FD","FE","FF"};
  74
  75 /**
  76  * @defgroup StrBuf Stringbuffer, A class for manipulating strings with dynamic buffers
  77  * StrBuf is a versatile class, aiding the handling of dynamic strings
  78  *  * reduce de/reallocations
  79  *  * reduce the need to remeasure it
  80  *  * reduce scanning over the string (in @ref StrBuf_NextTokenizer "Tokenizers")
  81  *  * allow asyncroneous IO for line and Blob based operations
  82  *  * reduce the use of memove in those
  83  *  * Quick filling in several operations with append functions
  84  */
  85
  86 /**
  87  * @defgroup StrBuf_DeConstructors Create/Destroy StrBufs
  88  * @ingroup StrBuf
  89  */
  90
  91 /**
  92  * @defgroup StrBuf_Cast Cast operators to interact with char* based code
  93  * @ingroup StrBuf
  94  * use these operators to interfere with code demanding char*;
  95  * if you need to own the content, smash me. Avoid, since we loose the length information.
  96  */
  97
  98 /**
  99  * @defgroup StrBuf_Filler Create/Replace/Append Content into a StrBuf
 100  * @ingroup StrBuf
 101  * operations to get your Strings into a StrBuf, manipulating them, or appending
 102  */
 103 /**
 104  * @defgroup StrBuf_NextTokenizer Fast tokenizer to pull tokens in sequence
 105  * @ingroup StrBuf
 106  * Quick tokenizer; demands of the user to pull its tokens in sequence
 107  */
 108
 109 /**
 110  * @defgroup StrBuf_Tokenizer tokenizer Functions; Slow ones.
 111  * @ingroup StrBuf
 112  * versatile tokenizer; random access to tokens, but slower; Prefer the @ref StrBuf_NextTokenizer "Next Tokenizer"
 113  */
 114
 115 /**
 116  * @defgroup StrBuf_BufferedIO Buffered IO with Asynchroneous reads and no unneeded memmoves (the fast ones)
 117  * @ingroup StrBuf
 118  * File IO to fill StrBufs; Works with work-buffer shared across several calls;
 119  * External Cursor to maintain the current read position inside of the buffer
 120  * the non-fast ones will use memove to keep the start of the buffer the read buffer (which is slower)
 121  */
 122
 123 /**
 124  * @defgroup StrBuf_IO FileIO; Prefer @ref StrBuf_BufferedIO
 125  * @ingroup StrBuf
 126  * Slow I/O; avoid.
 127  */
 128
 129 /**
 130  * @defgroup StrBuf_DeEnCoder functions to translate the contents of a buffer
 131  * @ingroup StrBuf
 132  * these functions translate the content of a buffer into another representation;
 133  * some are combined Fillers and encoders
 134  */
 135
 136 /**
 137  * Private Structure for the Stringbuffer
 138  */
 139 struct StrBuf {
 140         char *buf;         /**< the pointer to the dynamic buffer */
 141         long BufSize;      /**< how many spcae do we optain */
 142         long BufUsed;      /**< StNumber of Chars used excluding the trailing \\0 */
 143         int ConstBuf;      /**< are we just a wrapper arround a static buffer and musn't we be changed? */
 144 #ifdef SIZE_DEBUG
 145         long nIncreases;   /**< for profiling; cound how many times we needed more */
 146         char bt [SIZ];     /**< Stacktrace of last increase */
 147         char bt_lastinc [SIZ]; /**< How much did we increase last time? */
 148 #endif
 149 };
 150
 151
 152 static inline int Ctdl_GetUtf8SequenceLength(const char *CharS, const char *CharE);
 153 static inline int Ctdl_IsUtf8SequenceStart(const char Char);
 154
 155 #ifdef SIZE_DEBUG
 156 #ifdef HAVE_BACKTRACE
 157 static void StrBufBacktrace(StrBuf *Buf, int which)
 158 {
 159         int n;
 160         char *pstart, *pch;
 161         void *stack_frames[50];
 162         size_t size, i;
 163         char **strings;
 164
 165         if (which)
 166                 pstart = pch = Buf->bt;
 167         else
 168                 pstart = pch = Buf->bt_lastinc;
 169         size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
 170         strings = backtrace_symbols(stack_frames, size);
 171         for (i = 0; i < size; i++) {
 172                 if (strings != NULL)
 173                         n = snprintf(pch, SIZ - (pch - pstart), "%s\\n", strings[i]);
 174                 else
 175                         n = snprintf(pch, SIZ - (pch - pstart), "%p\\n", stack_frames[i]);
 176                 pch += n;
 177         }
 178         free(strings);
 179
 180
 181 }
 182 #endif
 183
 184 void dbg_FreeStrBuf(StrBuf *FreeMe, char *FromWhere)
 185 {
 186         if (hFreeDbglog == -1){
 187                 pid_t pid = getpid();
 188                 char path [SIZ];
 189                 snprintf(path, SIZ, "/tmp/libcitadel_strbuf_realloc.log.%d", pid);
 190                 hFreeDbglog = open(path, O_APPEND|O_CREAT|O_WRONLY);
 191         }
 192         if ((*FreeMe)->nIncreases > 0)
 193         {
 194                 char buf[SIZ * 3];
 195                 long n;
 196                 n = snprintf(buf, SIZ * 3, "%c+|%ld|%ld|%ld|%s|%s|\n",
 197                              FromWhere,
 198                              (*FreeMe)->nIncreases,
 199                              (*FreeMe)->BufUsed,
 200                              (*FreeMe)->BufSize,
 201                              (*FreeMe)->bt,
 202                              (*FreeMe)->bt_lastinc);
 203                 n = write(hFreeDbglog, buf, n);
 204         }
 205         else
 206         {
 207                 char buf[128];
 208                 long n;
 209                 n = snprintf(buf, 128, "%c_|0|%ld%ld|\n",
 210                              FromWhere,
 211                              (*FreeMe)->BufUsed,
 212                              (*FreeMe)->BufSize);
 213                 n = write(hFreeDbglog, buf, n);
 214         }
 215 }
 216
 217 void dbg_IncreaseBuf(StrBuf *IncMe)
 218 {
 219         Buf->nIncreases++;
 220 #ifdef HAVE_BACKTRACE
 221         StrBufBacktrace(Buf, 1);
 222 #endif
 223 }
 224
 225 void dbg_Init(StrBuf *Buf)
 226 {
 227         Buf->nIncreases = 0;
 228         Buf->bt[0] = '\0';
 229         Buf->bt_lastinc[0] = '\0';
 230 #ifdef HAVE_BACKTRACE
 231         StrBufBacktrace(Buf, 0);
 232 #endif
 233 }
 234
 235 #else
 236 /* void it... */
 237 #define dbg_FreeStrBuf(a, b)
 238 #define dbg_IncreaseBuf(a)
 239 #define dbg_Init(a)
 240
 241 #endif
 242
 243 /**
 244  * @ingroup StrBuf
 245  * @brief swaps the contents of two StrBufs
 246  * this is to be used to have cheap switched between a work-buffer and a target buffer
 247  * @param A First one
 248  * @param B second one
 249  */
 250 static inline void SwapBuffers(StrBuf *A, StrBuf *B)
 251 {
 252         StrBuf C;
 253
 254         memcpy(&C, A, sizeof(*A));
 255         memcpy(A, B, sizeof(*B));
 256         memcpy(B, &C, sizeof(C));
 257
 258 }
 259
 260 /**
 261  * @ingroup StrBuf_Cast
 262  * @brief Cast operator to Plain String
 263  * @note if the buffer is altered by StrBuf operations, this pointer may become
 264  *  invalid. So don't lean on it after altering the buffer!
 265  *  Since this operation is considered cheap, rather call it often than risking
 266  *  your pointer to become invalid!
 267  * @param Str the string we want to get the c-string representation for
 268  * @returns the Pointer to the Content. Don't mess with it!
 269  */
 270 inline const char *ChrPtr(const StrBuf *Str)
 271 {
 272         if (Str == NULL)
 273                 return "";
 274         return Str->buf;
 275 }
 276
 277 /**
 278  * @ingroup StrBuf_Cast
 279  * @brief since we know strlen()'s result, provide it here.
 280  * @param Str the string to return the length to
 281  * @returns contentlength of the buffer
 282  */
 283 inline int StrLength(const StrBuf *Str)
 284 {
 285         return (Str != NULL) ? Str->BufUsed : 0;
 286 }
 287
 288 /**
 289  * @ingroup StrBuf_DeConstructors
 290  * @brief local utility function to resize the buffer
 291  * @param Buf the buffer whichs storage we should increase
 292  * @param KeepOriginal should we copy the original buffer or just start over with a new one
 293  * @param DestSize what should fit in after?
 294  */
 295 static int IncreaseBuf(StrBuf *Buf, int KeepOriginal, int DestSize)
 296 {
 297         char *NewBuf;
 298         size_t NewSize = Buf->BufSize * 2;
 299
 300         if (Buf->ConstBuf)
 301                 return -1;
 302
 303         if (DestSize > 0)
 304                 while ((NewSize <= DestSize) && (NewSize != 0))
 305                         NewSize *= 2;
 306
 307         if (NewSize == 0)
 308                 return -1;
 309
 310         NewBuf= (char*) malloc(NewSize);
 311         if (NewBuf == NULL)
 312                 return -1;
 313
 314         if (KeepOriginal && (Buf->BufUsed > 0))
 315         {
 316                 memcpy(NewBuf, Buf->buf, Buf->BufUsed);
 317         }
 318         else
 319         {
 320                 NewBuf[0] = '\0';
 321                 Buf->BufUsed = 0;
 322         }
 323         free (Buf->buf);
 324         Buf->buf = NewBuf;
 325         Buf->BufSize = NewSize;
 326
 327         dbg_IncreaseBuf(Buf);
 328
 329         return Buf->BufSize;
 330 }
 331
 332 /**
 333  * @ingroup StrBuf_DeConstructors
 334  * @brief shrink / increase an _EMPTY_ buffer to NewSize. Buffercontent is thoroughly ignored and flushed.
 335  * @param Buf Buffer to shrink (has to be empty)
 336  * @param ThreshHold if the buffer is bigger then this, its readjusted
 337  * @param NewSize if we Shrink it, how big are we going to be afterwards?
 338  */
 339 void ReAdjustEmptyBuf(StrBuf *Buf, long ThreshHold, long NewSize)
 340 {
 341         if ((Buf != NULL) &&
 342             (Buf->BufUsed == 0) &&
 343             (Buf->BufSize < ThreshHold)) {
 344                 free(Buf->buf);
 345                 Buf->buf = (char*) malloc(NewSize);
 346                 Buf->BufUsed = 0;
 347                 Buf->BufSize = NewSize;
 348         }
 349 }
 350
 351 /**
 352  * @ingroup StrBuf_DeConstructors
 353  * @brief shrink long term buffers to their real size so they don't waste memory
 354  * @param Buf buffer to shrink
 355  * @param Force if not set, will just executed if the buffer is much to big; set for lifetime strings
 356  * @returns physical size of the buffer
 357  */
 358 long StrBufShrinkToFit(StrBuf *Buf, int Force)
 359 {
 360         if (Buf == NULL)
 361                 return -1;
 362         if (Force ||
 363             (Buf->BufUsed + (Buf->BufUsed / 3) > Buf->BufSize))
 364         {
 365                 char *TmpBuf;
 366
 367                 TmpBuf = (char*) malloc(Buf->BufUsed + 1);
 368                 if (TmpBuf == NULL)
 369                         return -1;
 370
 371                 memcpy (TmpBuf, Buf->buf, Buf->BufUsed + 1);
 372                 Buf->BufSize = Buf->BufUsed + 1;
 373                 free(Buf->buf);
 374                 Buf->buf = TmpBuf;
 375         }
 376         return Buf->BufUsed;
 377 }
 378
 379 /**
 380  * @ingroup StrBuf_DeConstructors
 381  * @brief Allocate a new buffer with default buffer size
 382  * @returns the new stringbuffer
 383  */
 384 StrBuf* NewStrBuf(void)
 385 {
 386         StrBuf *NewBuf;
 387
 388         NewBuf = (StrBuf*) malloc(sizeof(StrBuf));
 389         if (NewBuf == NULL)
 390                 return NULL;
 391
 392         NewBuf->buf = (char*) malloc(BaseStrBufSize);
 393         if (NewBuf->buf == NULL)
 394         {
 395                 free(NewBuf);
 396                 return NULL;
 397         }
 398         NewBuf->buf[0] = '\0';
 399         NewBuf->BufSize = BaseStrBufSize;
 400         NewBuf->BufUsed = 0;
 401         NewBuf->ConstBuf = 0;
 402
 403         dbg_Init (NewBuf);
 404
 405         return NewBuf;
 406 }
 407
 408 /**
 409  * @ingroup StrBuf_DeConstructors
 410  * @brief Copy Constructor; returns a duplicate of CopyMe
 411  * @param CopyMe Buffer to faxmilate
 412  * @returns the new stringbuffer
 413  */
 414 StrBuf* NewStrBufDup(const StrBuf *CopyMe)
 415 {
 416         StrBuf *NewBuf;
 417
 418         if (CopyMe == NULL)
 419                 return NewStrBuf();
 420
 421         NewBuf = (StrBuf*) malloc(sizeof(StrBuf));
 422         if (NewBuf == NULL)
 423                 return NULL;
 424
 425         NewBuf->buf = (char*) malloc(CopyMe->BufSize);
 426         if (NewBuf->buf == NULL)
 427         {
 428                 free(NewBuf);
 429                 return NULL;
 430         }
 431
 432         memcpy(NewBuf->buf, CopyMe->buf, CopyMe->BufUsed + 1);
 433         NewBuf->BufUsed = CopyMe->BufUsed;
 434         NewBuf->BufSize = CopyMe->BufSize;
 435         NewBuf->ConstBuf = 0;
 436
 437         dbg_Init(NewBuf);
 438
 439         return NewBuf;
 440 }
 441
 442 /**
 443  * @ingroup StrBuf_DeConstructors
 444  * @brief Copy Constructor; CreateRelpaceMe will contain CopyFlushMe afterwards.
 445  * @param NoMe if non-NULL, we will use that buffer as value; KeepOriginal will abused as len.
 446  * @param CopyFlushMe Buffer to faxmilate if KeepOriginal, or to move into CreateRelpaceMe if !KeepOriginal.
 447  * @param CreateRelpaceMe If NULL, will be created, else Flushed and filled CopyFlushMe
 448  * @param KeepOriginal should CopyFlushMe remain intact? or may we Steal its buffer?
 449  * @returns the new stringbuffer
 450  */
 451 void NewStrBufDupAppendFlush(StrBuf **CreateRelpaceMe, StrBuf *CopyFlushMe, const char *NoMe, int KeepOriginal)
 452 {
 453         StrBuf *NewBuf;
 454
 455         if (CreateRelpaceMe == NULL)
 456                 return;
 457
 458         if (NoMe != NULL)
 459         {
 460                 if (*CreateRelpaceMe != NULL)
 461                         StrBufPlain(*CreateRelpaceMe, NoMe, KeepOriginal);
 462                 else
 463                         *CreateRelpaceMe = NewStrBufPlain(NoMe, KeepOriginal);
 464                 return;
 465         }
 466
 467         if (CopyFlushMe == NULL)
 468         {
 469                 if (*CreateRelpaceMe != NULL)
 470                         FlushStrBuf(*CreateRelpaceMe);
 471                 else
 472                         *CreateRelpaceMe = NewStrBuf();
 473                 return;
 474         }
 475
 476         /*
 477          * Randomly Chosen: bigger than 64 chars is cheaper to swap the buffers instead of copying.
 478          * else *CreateRelpaceMe may use more memory than needed in a longer term, CopyFlushMe might
 479          * be a big IO-Buffer...
 480          */
 481         if (KeepOriginal || (StrLength(CopyFlushMe) < 256))
 482         {
 483                 if (*CreateRelpaceMe == NULL)
 484                 {
 485                         *CreateRelpaceMe = NewBuf = NewStrBufPlain(NULL, CopyFlushMe->BufUsed);
 486                         dbg_Init(NewBuf);
 487                 }
 488                 else
 489                 {
 490                         NewBuf = *CreateRelpaceMe;
 491                         FlushStrBuf(NewBuf);
 492                 }
 493                 StrBufAppendBuf(NewBuf, CopyFlushMe, 0);
 494         }
 495         else
 496         {
 497                 if (*CreateRelpaceMe == NULL)
 498                 {
 499                         *CreateRelpaceMe = NewBuf = NewStrBufPlain(NULL, CopyFlushMe->BufUsed);
 500                         dbg_Init(NewBuf);
 501                 }
 502                 else
 503                         NewBuf = *CreateRelpaceMe;
 504                 SwapBuffers (NewBuf, CopyFlushMe);
 505         }
 506         if (!KeepOriginal)
 507                 FlushStrBuf(CopyFlushMe);
 508         return;
 509 }
 510
 511 /**
 512  * @ingroup StrBuf_DeConstructors
 513  * @brief create a new Buffer using an existing c-string
 514  * this function should also be used if you want to pre-suggest
 515  * the buffer size to allocate in conjunction with ptr == NULL
 516  * @param ptr the c-string to copy; may be NULL to create a blank instance
 517  * @param nChars How many chars should we copy; -1 if we should measure the length ourselves
 518  * @returns the new stringbuffer
 519  */
 520 StrBuf* NewStrBufPlain(const char* ptr, int nChars)
 521 {
 522         StrBuf *NewBuf;
 523         size_t Siz = BaseStrBufSize;
 524         size_t CopySize;
 525
 526         NewBuf = (StrBuf*) malloc(sizeof(StrBuf));
 527         if (NewBuf == NULL)
 528                 return NULL;
 529
 530         if (nChars < 0)
 531                 CopySize = strlen((ptr != NULL)?ptr:"");
 532         else
 533                 CopySize = nChars;
 534
 535         while ((Siz <= CopySize) && (Siz != 0))
 536                 Siz *= 2;
 537
 538         if (Siz == 0)
 539         {
 540                 free(NewBuf);
 541                 return NULL;
 542         }
 543
 544         NewBuf->buf = (char*) malloc(Siz);
 545         if (NewBuf->buf == NULL)
 546         {
 547                 free(NewBuf);
 548                 return NULL;
 549         }
 550         NewBuf->BufSize = Siz;
 551         if (ptr != NULL) {
 552                 memcpy(NewBuf->buf, ptr, CopySize);
 553                 NewBuf->buf[CopySize] = '\0';
 554                 NewBuf->BufUsed = CopySize;
 555         }
 556         else {
 557                 NewBuf->buf[0] = '\0';
 558                 NewBuf->BufUsed = 0;
 559         }
 560         NewBuf->ConstBuf = 0;
 561
 562         dbg_Init(NewBuf);
 563
 564         return NewBuf;
 565 }
 566
 567 /**
 568  * @ingroup StrBuf_DeConstructors
 569  * @brief Set an existing buffer from a c-string
 570  * @param Buf buffer to load
 571  * @param ptr c-string to put into
 572  * @param nChars set to -1 if we should work 0-terminated
 573  * @returns the new length of the string
 574  */
 575 int StrBufPlain(StrBuf *Buf, const char* ptr, int nChars)
 576 {
 577         size_t Siz;
 578         size_t CopySize;
 579
 580         if (Buf == NULL)
 581                 return -1;
 582         if (ptr == NULL) {
 583                 FlushStrBuf(Buf);
 584                 return -1;
 585         }
 586
 587         Siz = Buf->BufSize;
 588
 589         if (nChars < 0)
 590                 CopySize = strlen(ptr);
 591         else
 592                 CopySize = nChars;
 593
 594         while ((Siz <= CopySize) && (Siz != 0))
 595                 Siz *= 2;
 596
 597         if (Siz == 0) {
 598                 FlushStrBuf(Buf);
 599                 return -1;
 600         }
 601
 602         if (Siz != Buf->BufSize)
 603                 IncreaseBuf(Buf, 0, Siz);
 604         memcpy(Buf->buf, ptr, CopySize);
 605         Buf->buf[CopySize] = '\0';
 606         Buf->BufUsed = CopySize;
 607         Buf->ConstBuf = 0;
 608         return CopySize;
 609 }
 610
 611
 612 /**
 613  * @ingroup StrBuf_DeConstructors
 614  * @brief use strbuf as wrapper for a string constant for easy handling
 615  * @param StringConstant a string to wrap
 616  * @param SizeOfStrConstant should be sizeof(StringConstant)-1
 617  */
 618 StrBuf* _NewConstStrBuf(const char* StringConstant, size_t SizeOfStrConstant)
 619 {
 620         StrBuf *NewBuf;
 621
 622         NewBuf = (StrBuf*) malloc(sizeof(StrBuf));
 623         if (NewBuf == NULL)
 624                 return NULL;
 625         NewBuf->buf = (char*) StringConstant;
 626         NewBuf->BufSize = SizeOfStrConstant;
 627         NewBuf->BufUsed = SizeOfStrConstant;
 628         NewBuf->ConstBuf = 1;
 629
 630         dbg_Init(NewBuf);
 631
 632         return NewBuf;
 633 }
 634
 635
 636 /**
 637  * @ingroup StrBuf_DeConstructors
 638  * @brief flush the content of a Buf; keep its struct
 639  * @param buf Buffer to flush
 640  */
 641 int FlushStrBuf(StrBuf *buf)
 642 {
 643         if ((buf == NULL) || (buf->buf == NULL))
 644                 return -1;
 645         if (buf->ConstBuf)
 646                 return -1;
 647         buf->buf[0] ='\0';
 648         buf->BufUsed = 0;
 649         return 0;
 650 }
 651
 652 /**
 653  * @ingroup StrBuf_DeConstructors
 654  * @brief wipe the content of a Buf thoroughly (overwrite it -> expensive); keep its struct
 655  * @param buf Buffer to wipe
 656  */
 657 int FLUSHStrBuf(StrBuf *buf)
 658 {
 659         if (buf == NULL)
 660                 return -1;
 661         if (buf->ConstBuf)
 662                 return -1;
 663         if (buf->BufUsed > 0) {
 664                 memset(buf->buf, 0, buf->BufUsed);
 665                 buf->BufUsed = 0;
 666         }
 667         return 0;
 668 }
 669
 670 #ifdef SIZE_DEBUG
 671 int hFreeDbglog = -1;
 672 #endif
 673 /**
 674  * @ingroup StrBuf_DeConstructors
 675  * @brief Release a Buffer
 676  * Its a double pointer, so it can NULL your pointer
 677  * so fancy SIG11 appear instead of random results
 678  * @param FreeMe Pointer Pointer to the buffer to free
 679  */
 680 void FreeStrBuf (StrBuf **FreeMe)
 681 {
 682         if (*FreeMe == NULL)
 683                 return;
 684
 685         dbg_FreeStrBuf(FreeMe, 'F');
 686
 687         if (!(*FreeMe)->ConstBuf)
 688                 free((*FreeMe)->buf);
 689         free(*FreeMe);
 690         *FreeMe = NULL;
 691 }
 692
 693 /**
 694  * @ingroup StrBuf_DeConstructors
 695  * @brief flatten a Buffer to the Char * we return
 696  * Its a double pointer, so it can NULL your pointer
 697  * so fancy SIG11 appear instead of random results
 698  * The Callee then owns the buffer and is responsible for freeing it.
 699  * @param SmashMe Pointer Pointer to the buffer to release Buf from and free
 700  * @returns the pointer of the buffer; Callee owns the memory thereafter.
 701  */
 702 char *SmashStrBuf (StrBuf **SmashMe)
 703 {
 704         char *Ret;
 705
 706         if ((SmashMe == NULL) || (*SmashMe == NULL))
 707                 return NULL;
 708
 709         dbg_FreeStrBuf(SmashMe, 'S');
 710
 711         Ret = (*SmashMe)->buf;
 712         free(*SmashMe);
 713         *SmashMe = NULL;
 714         return Ret;
 715 }
 716
 717 /**
 718  * @ingroup StrBuf_DeConstructors
 719  * @brief Release the buffer
 720  * If you want put your StrBuf into a Hash, use this as Destructor.
 721  * @param VFreeMe untyped pointer to a StrBuf. be shure to do the right thing [TM]
 722  */
 723 void HFreeStrBuf (void *VFreeMe)
 724 {
 725         StrBuf *FreeMe = (StrBuf*)VFreeMe;
 726         if (FreeMe == NULL)
 727                 return;
 728
 729         dbg_FreeStrBuf(SmashMe, 'H');
 730
 731         if (!FreeMe->ConstBuf)
 732                 free(FreeMe->buf);
 733         free(FreeMe);
 734 }
 735
 736
 737 /*******************************************************************************
 738  *                      Simple string transformations                          *
 739  *******************************************************************************/
 740
 741 /**
 742  * @ingroup StrBuf
 743  * @brief Wrapper around atol
 744  */
 745 long StrTol(const StrBuf *Buf)
 746 {
 747         if (Buf == NULL)
 748                 return 0;
 749         if(Buf->BufUsed > 0)
 750                 return atol(Buf->buf);
 751         else
 752                 return 0;
 753 }
 754
 755 /**
 756  * @ingroup StrBuf
 757  * @brief Wrapper around atoi
 758  */
 759 int StrToi(const StrBuf *Buf)
 760 {
 761         if (Buf == NULL)
 762                 return 0;
 763         if (Buf->BufUsed > 0)
 764                 return atoi(Buf->buf);
 765         else
 766                 return 0;
 767 }
 768
 769 /**
 770  * @ingroup StrBuf
 771  * @brief Checks to see if the string is a pure number
 772  * @param Buf The buffer to inspect
 773  * @returns 1 if its a pure number, 0, if not.
 774  */
 775 int StrBufIsNumber(const StrBuf *Buf) {
 776         char * pEnd;
 777         if ((Buf == NULL) || (Buf->BufUsed == 0)) {
 778                 return 0;
 779         }
 780         strtoll(Buf->buf, &pEnd, 10);
 781         if (pEnd == Buf->buf)
 782                 return 0;
 783         if ((pEnd != NULL) && (pEnd == Buf->buf + Buf->BufUsed))
 784                 return 1;
 785         if (Buf->buf == pEnd)
 786                 return 0;
 787         return 0;
 788 }
 789
 790 /**
 791  * @ingroup StrBuf_Filler
 792  * @brief modifies a Single char of the Buf
 793  * You can point to it via char* or a zero-based integer
 794  * @param Buf The buffer to manipulate
 795  * @param ptr char* to zero; use NULL if unused
 796  * @param nThChar zero based pointer into the string; use -1 if unused
 797  * @param PeekValue The Character to place into the position
 798  */
 799 long StrBufPeek(StrBuf *Buf, const char* ptr, long nThChar, char PeekValue)
 800 {
 801         if (Buf == NULL)
 802                 return -1;
 803         if (ptr != NULL)
 804                 nThChar = ptr - Buf->buf;
 805         if ((nThChar < 0) || (nThChar > Buf->BufUsed))
 806                 return -1;
 807         Buf->buf[nThChar] = PeekValue;
 808         return nThChar;
 809 }
 810
 811 /**
 812  * @ingroup StrBuf_Filler
 813  * @brief modifies a range of chars of the Buf
 814  * You can point to it via char* or a zero-based integer
 815  * @param Buf The buffer to manipulate
 816  * @param ptr char* to zero; use NULL if unused
 817  * @param nThChar zero based pointer into the string; use -1 if unused
 818  * @param nChars how many chars are to be flushed?
 819  * @param PookValue The Character to place into that area
 820  */
 821 long StrBufPook(StrBuf *Buf, const char* ptr, long nThChar, long nChars, char PookValue)
 822 {
 823         if (Buf == NULL)
 824                 return -1;
 825         if (ptr != NULL)
 826                 nThChar = ptr - Buf->buf;
 827         if ((nThChar < 0) || (nThChar > Buf->BufUsed))
 828                 return -1;
 829         if (nThChar + nChars > Buf->BufUsed)
 830                 nChars =  Buf->BufUsed - nThChar;
 831
 832         memset(Buf->buf + nThChar, PookValue, nChars);
 833         /* just to be shure... */
 834         Buf->buf[Buf->BufUsed] = 0;
 835         return nChars;
 836 }
 837
 838 /**
 839  * @ingroup StrBuf_Filler
 840  * @brief Append a StringBuffer to the buffer
 841  * @param Buf Buffer to modify
 842  * @param AppendBuf Buffer to copy at the end of our buffer
 843  * @param Offset Should we start copying from an offset?
 844  */
 845 void StrBufAppendBuf(StrBuf *Buf, const StrBuf *AppendBuf, unsigned long Offset)
 846 {
 847         if ((AppendBuf == NULL) || (AppendBuf->buf == NULL) ||
 848             (Buf == NULL) || (Buf->buf == NULL))
 849                 return;
 850
 851         if (Buf->BufSize - Offset < AppendBuf->BufUsed + Buf->BufUsed + 1)
 852                 IncreaseBuf(Buf,
 853                             (Buf->BufUsed > 0),
 854                             AppendBuf->BufUsed + Buf->BufUsed);
 855
 856         memcpy(Buf->buf + Buf->BufUsed,
 857                AppendBuf->buf + Offset,
 858                AppendBuf->BufUsed - Offset);
 859         Buf->BufUsed += AppendBuf->BufUsed - Offset;
 860         Buf->buf[Buf->BufUsed] = '\0';
 861 }
 862
 863
 864 /**
 865  * @ingroup StrBuf_Filler
 866  * @brief Append a C-String to the buffer
 867  * @param Buf Buffer to modify
 868  * @param AppendBuf Buffer to copy at the end of our buffer
 869  * @param AppendSize number of bytes to copy; set to -1 if we should count it in advance
 870  * @param Offset Should we start copying from an offset?
 871  */
 872 void StrBufAppendBufPlain(StrBuf *Buf, const char *AppendBuf, long AppendSize, unsigned long Offset)
 873 {
 874         long aps;
 875         long BufSizeRequired;
 876
 877         if ((AppendBuf == NULL) || (Buf == NULL))
 878                 return;
 879
 880         if (AppendSize < 0 )
 881                 aps = strlen(AppendBuf + Offset);
 882         else
 883                 aps = AppendSize - Offset;
 884
 885         BufSizeRequired = Buf->BufUsed + aps + 1;
 886         if (Buf->BufSize <= BufSizeRequired)
 887                 IncreaseBuf(Buf, (Buf->BufUsed > 0), BufSizeRequired);
 888
 889         memcpy(Buf->buf + Buf->BufUsed,
 890                AppendBuf + Offset,
 891                aps);
 892         Buf->BufUsed += aps;
 893         Buf->buf[Buf->BufUsed] = '\0';
 894 }
 895
 896 /**
 897  * @ingroup StrBuf_Filler
 898  * @brief sprintf like function appending the formated string to the buffer
 899  * vsnprintf version to wrap into own calls
 900  * @param Buf Buffer to extend by format and Params
 901  * @param format printf alike format to add
 902  * @param ap va_list containing the items for format
 903  */
 904 void StrBufVAppendPrintf(StrBuf *Buf, const char *format, va_list ap)
 905 {
 906         va_list apl;
 907         size_t BufSize;
 908         size_t nWritten;
 909         size_t Offset;
 910         size_t newused;
 911
 912         if ((Buf == NULL)  || (format == NULL))
 913                 return;
 914
 915         BufSize = Buf->BufSize;
 916         nWritten = Buf->BufSize + 1;
 917         Offset = Buf->BufUsed;
 918         newused = Offset + nWritten;
 919
 920         while (newused >= BufSize) {
 921                 va_copy(apl, ap);
 922                 nWritten = vsnprintf(Buf->buf + Offset,
 923                                      Buf->BufSize - Offset,
 924                                      format, apl);
 925                 va_end(apl);
 926                 newused = Offset + nWritten;
 927                 if (newused >= Buf->BufSize) {
 928                         if (IncreaseBuf(Buf, 1, newused) == -1)
 929                                 return; /* TODO: error handling? */
 930                         newused = Buf->BufSize + 1;
 931                 }
 932                 else {
 933                         Buf->BufUsed = Offset + nWritten;
 934                         BufSize = Buf->BufSize;
 935                 }
 936
 937         }
 938 }
 939
 940 /**
 941  * @ingroup StrBuf_Filler
 942  * @brief sprintf like function appending the formated string to the buffer
 943  * @param Buf Buffer to extend by format and Params
 944  * @param format printf alike format to add
 945  */
 946 void StrBufAppendPrintf(StrBuf *Buf, const char *format, ...)
 947 {
 948         size_t BufSize;
 949         size_t nWritten;
 950         size_t Offset;
 951         size_t newused;
 952         va_list arg_ptr;
 953
 954         if ((Buf == NULL)  || (format == NULL))
 955                 return;
 956
 957         BufSize = Buf->BufSize;
 958         nWritten = Buf->BufSize + 1;
 959         Offset = Buf->BufUsed;
 960         newused = Offset + nWritten;
 961
 962         while (newused >= BufSize) {
 963                 va_start(arg_ptr, format);
 964                 nWritten = vsnprintf(Buf->buf + Buf->BufUsed,
 965                                      Buf->BufSize - Buf->BufUsed,
 966                                      format, arg_ptr);
 967                 va_end(arg_ptr);
 968                 newused = Buf->BufUsed + nWritten;
 969                 if (newused >= Buf->BufSize) {
 970                         if (IncreaseBuf(Buf, 1, newused) == -1)
 971                                 return; /* TODO: error handling? */
 972                         newused = Buf->BufSize + 1;
 973                 }
 974                 else {
 975                         Buf->BufUsed += nWritten;
 976                         BufSize = Buf->BufSize;
 977                 }
 978
 979         }
 980 }
 981
 982 /**
 983  * @ingroup StrBuf_Filler
 984  * @brief sprintf like function putting the formated string into the buffer
 985  * @param Buf Buffer to extend by format and Parameters
 986  * @param format printf alike format to add
 987  */
 988 void StrBufPrintf(StrBuf *Buf, const char *format, ...)
 989 {
 990         size_t nWritten;
 991         va_list arg_ptr;
 992
 993         if ((Buf == NULL)  || (format == NULL))
 994                 return;
 995
 996         nWritten = Buf->BufSize + 1;
 997         while (nWritten >= Buf->BufSize) {
 998                 va_start(arg_ptr, format);
 999                 nWritten = vsnprintf(Buf->buf, Buf->BufSize, format, arg_ptr);
1000                 va_end(arg_ptr);
1001                 if (nWritten >= Buf->BufSize) {
1002                         if (IncreaseBuf(Buf, 0, 0) == -1)
1003                                 return; /* TODO: error handling? */
1004                         nWritten = Buf->BufSize + 1;
1005                         continue;
1006                 }
1007                 Buf->BufUsed = nWritten ;
1008         }
1009 }
1010
1011 /**
1012  * @ingroup StrBuf_Filler
1013  * @brief Callback for cURL to append the webserver reply to a buffer
1014  * @param ptr pre-defined by the cURL API; see man 3 curl for mre info
1015  * @param size pre-defined by the cURL API; see man 3 curl for mre info
1016  * @param nmemb pre-defined by the cURL API; see man 3 curl for mre info
1017  * @param stream pre-defined by the cURL API; see man 3 curl for mre info
1018  */
1019 size_t CurlFillStrBuf_callback(void *ptr, size_t size, size_t nmemb, void *stream)
1020 {
1021
1022         StrBuf *Target;
1023
1024         Target = stream;
1025         if (ptr == NULL)
1026                 return 0;
1027
1028         StrBufAppendBufPlain(Target, ptr, size * nmemb, 0);
1029         return size * nmemb;
1030 }
1031
1032
1033 /**
1034  * @ingroup StrBuf
1035  * @brief extracts a substring from Source into dest
1036  * @param dest buffer to place substring into
1037  * @param Source string to copy substring from
1038  * @param Offset chars to skip from start
1039  * @param nChars number of chars to copy
1040  * @returns the number of chars copied; may be different from nChars due to the size of Source
1041  */
1042 int StrBufSub(StrBuf *dest, const StrBuf *Source, unsigned long Offset, size_t nChars)
1043 {
1044         size_t NCharsRemain;
1045         if (Offset > Source->BufUsed)
1046         {
1047                 if (dest != NULL)
1048                         FlushStrBuf(dest);
1049                 return 0;
1050         }
1051         if (Offset + nChars < Source->BufUsed)
1052         {
1053                 if ((nChars >= dest->BufSize) &&
1054                     (IncreaseBuf(dest, 0, nChars + 1) == -1))
1055                         return 0;
1056                 memcpy(dest->buf, Source->buf + Offset, nChars);
1057                 dest->BufUsed = nChars;
1058                 dest->buf[dest->BufUsed] = '\0';
1059                 return nChars;
1060         }
1061         NCharsRemain = Source->BufUsed - Offset;
1062         if ((NCharsRemain  >= dest->BufSize) &&
1063             (IncreaseBuf(dest, 0, NCharsRemain + 1) == -1))
1064                 return 0;
1065         memcpy(dest->buf, Source->buf + Offset, NCharsRemain);
1066         dest->BufUsed = NCharsRemain;
1067         dest->buf[dest->BufUsed] = '\0';
1068         return NCharsRemain;
1069 }
1070
1071 /**
1072  * @ingroup StrBuf
1073  * @brief Cut nChars from the start of the string
1074  * @param Buf Buffer to modify
1075  * @param nChars how many chars should be skipped?
1076  */
1077 void StrBufCutLeft(StrBuf *Buf, int nChars)
1078 {
1079         if ((Buf == NULL) || (Buf->BufUsed == 0)) return;
1080         if (nChars >= Buf->BufUsed) {
1081                 FlushStrBuf(Buf);
1082                 return;
1083         }
1084         memmove(Buf->buf, Buf->buf + nChars, Buf->BufUsed - nChars);
1085         Buf->BufUsed -= nChars;
1086         Buf->buf[Buf->BufUsed] = '\0';
1087 }
1088
1089 /**
1090  * @ingroup StrBuf
1091  * @brief Cut the trailing n Chars from the string
1092  * @param Buf Buffer to modify
1093  * @param nChars how many chars should be trunkated?
1094  */
1095 void StrBufCutRight(StrBuf *Buf, int nChars)
1096 {
1097         if ((Buf == NULL) || (Buf->BufUsed == 0) || (Buf->buf == NULL))
1098                 return;
1099
1100         if (nChars >= Buf->BufUsed) {
1101                 FlushStrBuf(Buf);
1102                 return;
1103         }
1104         Buf->BufUsed -= nChars;
1105         Buf->buf[Buf->BufUsed] = '\0';
1106 }
1107
1108 /**
1109  * @ingroup StrBuf
1110  * @brief Cut the string after n Chars
1111  * @param Buf Buffer to modify
1112  * @param AfternChars after how many chars should we trunkate the string?
1113  * @param At if non-null and points inside of our string, cut it there.
1114  */
1115 void StrBufCutAt(StrBuf *Buf, int AfternChars, const char *At)
1116 {
1117         if ((Buf == NULL) || (Buf->BufUsed == 0)) return;
1118         if (At != NULL){
1119                 AfternChars = At - Buf->buf;
1120         }
1121
1122         if ((AfternChars < 0) || (AfternChars >= Buf->BufUsed))
1123                 return;
1124         Buf->BufUsed = AfternChars;
1125         Buf->buf[Buf->BufUsed] = '\0';
1126 }
1127
1128
1129 /**
1130  * @ingroup StrBuf
1131  * @brief Strip leading and trailing spaces from a string; with premeasured and adjusted length.
1132  * @param Buf the string to modify
1133  */
1134 void StrBufTrim(StrBuf *Buf)
1135 {
1136         int delta = 0;
1137         if ((Buf == NULL) || (Buf->BufUsed == 0)) return;
1138
1139         while ((Buf->BufUsed > 0) &&
1140                isspace(Buf->buf[Buf->BufUsed - 1]))
1141         {
1142                 Buf->BufUsed --;
1143         }
1144         Buf->buf[Buf->BufUsed] = '\0';
1145
1146         if (Buf->BufUsed == 0) return;
1147
1148         while ((Buf->BufUsed > delta) && (isspace(Buf->buf[delta]))){
1149                 delta ++;
1150         }
1151         if (delta > 0) StrBufCutLeft(Buf, delta);
1152 }
1153 /**
1154  * @ingroup StrBuf
1155  * @brief changes all spaces in the string  (tab, linefeed...) to Blank (0x20)
1156  * @param Buf the string to modify
1157  */
1158 void StrBufSpaceToBlank(StrBuf *Buf)
1159 {
1160         char *pche, *pch;
1161
1162         if ((Buf == NULL) || (Buf->BufUsed == 0)) return;
1163
1164         pch = Buf->buf;
1165         pche = pch + Buf->BufUsed;
1166         while (pch < pche)
1167         {
1168                 if (isspace(*pch))
1169                         *pch = ' ';
1170                 pch ++;
1171         }
1172 }
1173
1174 void StrBufStripAllBut(StrBuf *Buf, char leftboundary, char rightboundary)
1175 {
1176         const char *pBuff;
1177         const char *pLeft;
1178         const char *pRight;
1179
1180         if ((Buf == NULL) || (Buf->buf == NULL))
1181                 return;
1182         pLeft = pBuff = Buf->buf;
1183         while (pBuff != NULL) {
1184                 pLeft = pBuff;
1185                 pBuff = strchr(pBuff, leftboundary);
1186                 if (pBuff != NULL)
1187                         pBuff++;
1188         }
1189
1190         if (pLeft != NULL)
1191                 pBuff = pLeft;
1192         else
1193                 pBuff = Buf->buf;
1194         pRight = strchr(pBuff, rightboundary);
1195         if (pRight != NULL)
1196                 StrBufCutAt(Buf, 0, pRight);
1197         if (pLeft != NULL)
1198                 StrBufCutLeft(Buf, pLeft - Buf->buf);
1199 }
1200
1201
1202 /**
1203  * @ingroup StrBuf_Filler
1204  * @brief uppercase the contents of a buffer
1205  * @param Buf the buffer to translate
1206  */
1207 void StrBufUpCase(StrBuf *Buf)
1208 {
1209         char *pch, *pche;
1210
1211         if ((Buf == NULL) || (Buf->BufUsed == 0)) return;
1212
1213         pch = Buf->buf;
1214         pche = pch + Buf->BufUsed;
1215         while (pch < pche) {
1216                 *pch = toupper(*pch);
1217                 pch ++;
1218         }
1219 }
1220
1221
1222 /**
1223  * @ingroup StrBuf_Filler
1224  * @brief lowercase the contents of a buffer
1225  * @param Buf the buffer to translate
1226  */
1227 void StrBufLowerCase(StrBuf *Buf)
1228 {
1229         char *pch, *pche;
1230
1231         if ((Buf == NULL) || (Buf->BufUsed == 0)) return;
1232
1233         pch = Buf->buf;
1234         pche = pch + Buf->BufUsed;
1235         while (pch < pche) {
1236                 *pch = tolower(*pch);
1237                 pch ++;
1238         }
1239 }
1240
1241
1242 /*******************************************************************************
1243  *           a tokenizer that kills, maims, and destroys                       *
1244  *******************************************************************************/
1245
1246 /**
1247  * @ingroup StrBuf_Tokenizer
1248  * @brief Replace a token at a given place with a given length by another token with given length
1249  * @param Buf String where to work on
1250  * @param where where inside of the Buf is the search-token
1251  * @param HowLong How long is the token to be replaced
1252  * @param Repl Token to insert at 'where'
1253  * @param ReplLen Length of repl
1254  * @returns -1 if fail else length of resulting Buf
1255  */
1256 int StrBufReplaceToken(StrBuf *Buf, long where, long HowLong,
1257                        const char *Repl, long ReplLen)
1258 {
1259
1260         if ((Buf == NULL) ||
1261             (where > Buf->BufUsed) ||
1262             (where + HowLong > Buf->BufUsed))
1263                 return -1;
1264
1265         if (where + ReplLen - HowLong > Buf->BufSize)
1266                 if (IncreaseBuf(Buf, 1, Buf->BufUsed + ReplLen) < 0)
1267                         return -1;
1268
1269         memmove(Buf->buf + where + ReplLen,
1270                 Buf->buf + where + HowLong,
1271                 Buf->BufUsed - where - HowLong);
1272
1273         memcpy(Buf->buf + where,
1274                Repl, ReplLen);
1275
1276         Buf->BufUsed += ReplLen - HowLong;
1277
1278         return Buf->BufUsed;
1279 }
1280
1281 /**
1282  * @ingroup StrBuf_Tokenizer
1283  * @brief Counts the numbmer of tokens in a buffer
1284  * @param source String to count tokens in
1285  * @param tok    Tokenizer char to count
1286  * @returns numbers of tokenizer chars found
1287  */
1288 int StrBufNum_tokens(const StrBuf *source, char tok)
1289 {
1290         char *pch, *pche;
1291         long NTokens;
1292         if ((source == NULL) || (source->BufUsed == 0))
1293                 return 0;
1294         if ((source->BufUsed == 1) && (*source->buf == tok))
1295                 return 2;
1296         NTokens = 1;
1297         pch = source->buf;
1298         pche = pch + source->BufUsed;
1299         while (pch < pche)
1300         {
1301                 if (*pch == tok)
1302                         NTokens ++;
1303                 pch ++;
1304         }
1305         return NTokens;
1306 }
1307
1308 /**
1309  * @ingroup StrBuf_Tokenizer
1310  * @brief a string tokenizer
1311  * @param Source StringBuffer to read into
1312  * @param parmnum n'th Parameter to remove
1313  * @param separator tokenizer character
1314  * @returns -1 if not found, else length of token.
1315  */
1316 int StrBufRemove_token(StrBuf *Source, int parmnum, char separator)
1317 {
1318         int ReducedBy;
1319         char *d, *s, *end;              /* dest, source */
1320         int count = 0;
1321
1322         /* Find desired @parameter */
1323         end = Source->buf + Source->BufUsed;
1324         d = Source->buf;
1325         while ((d <= end) &&
1326                (count < parmnum))
1327         {
1328                 /* End of string, bail! */
1329                 if (!*d) {
1330                         d = NULL;
1331                         break;
1332                 }
1333                 if (*d == separator) {
1334                         count++;
1335                 }
1336                 d++;
1337         }
1338         if ((d == NULL) || (d >= end))
1339                 return 0;               /* @Parameter not found */
1340
1341         /* Find next @parameter */
1342         s = d;
1343         while ((s <= end) &&
1344                (*s && *s != separator))
1345         {
1346                 s++;
1347         }
1348         if (*s == separator)
1349                 s++;
1350         ReducedBy = d - s;
1351
1352         /* Hack and slash */
1353         if (s >= end) {
1354                 return 0;
1355         }
1356         else if (*s) {
1357                 memmove(d, s, Source->BufUsed - (s - Source->buf));
1358                 Source->BufUsed += ReducedBy;
1359                 Source->buf[Source->BufUsed] = '\0';
1360         }
1361         else if (d == Source->buf) {
1362                 *d = 0;
1363                 Source->BufUsed = 0;
1364         }
1365         else {
1366                 *--d = '\0';
1367                 Source->BufUsed += ReducedBy;
1368         }
1369         /*
1370         while (*s) {
1371                 *d++ = *s++;
1372         }
1373         *d = 0;
1374         */
1375         return ReducedBy;
1376 }
1377
1378 int StrBufExtract_tokenFromStr(StrBuf *dest, const char *Source, long SourceLen, int parmnum, char separator)
1379 {
1380         const StrBuf Temp = {
1381                 (char*)Source,
1382                 SourceLen,
1383                 SourceLen,
1384                 1
1385 #ifdef SIZE_DEBUG
1386                 ,
1387                 0,
1388                 "",
1389                 ""
1390 #endif
1391         };
1392
1393         return StrBufExtract_token(dest, &Temp, parmnum, separator);
1394 }
1395
1396 /**
1397  * @ingroup StrBuf_Tokenizer
1398  * @brief a string tokenizer
1399  * @param dest Destination StringBuffer
1400  * @param Source StringBuffer to read into
1401  * @param parmnum n'th Parameter to extract
1402  * @param separator tokenizer character
1403  * @returns -1 if not found, else length of token.
1404  */
1405 int StrBufExtract_token(StrBuf *dest, const StrBuf *Source, int parmnum, char separator)
1406 {
1407         const char *s, *e;              //* source * /
1408         int len = 0;                    //* running total length of extracted string * /
1409         int current_token = 0;          //* token currently being processed * /
1410
1411         if (dest != NULL) {
1412                 dest->buf[0] = '\0';
1413                 dest->BufUsed = 0;
1414         }
1415         else
1416                 return(-1);
1417
1418         if ((Source == NULL) || (Source->BufUsed ==0)) {
1419                 return(-1);
1420         }
1421         s = Source->buf;
1422         e = s + Source->BufUsed;
1423
1424         //cit_backtrace();
1425         //lprintf (CTDL_DEBUG, "test >: n: %d sep: %c source: %s \n willi \n", parmnum, separator, source);
1426
1427         while ((s < e) && !IsEmptyStr(s)) {
1428                 if (*s == separator) {
1429                         ++current_token;
1430                 }
1431                 if (len >= dest->BufSize) {
1432                         dest->BufUsed = len;
1433                         if (IncreaseBuf(dest, 1, -1) < 0) {
1434                                 dest->BufUsed --;
1435                                 break;
1436                         }
1437                 }
1438                 if ( (current_token == parmnum) &&
1439                      (*s != separator)) {
1440                         dest->buf[len] = *s;
1441                         ++len;
1442                 }
1443                 else if (current_token > parmnum) {
1444                         break;
1445                 }
1446                 ++s;
1447         }
1448
1449         dest->buf[len] = '\0';
1450         dest->BufUsed = len;
1451
1452         if (current_token < parmnum) {
1453                 //lprintf (CTDL_DEBUG,"test <!: %s\n", dest);
1454                 return(-1);
1455         }
1456         //lprintf (CTDL_DEBUG,"test <: %d; %s\n", len, dest);
1457         return(len);
1458 }
1459
1460
1461
1462
1463
1464 /**
1465  * @ingroup StrBuf_Tokenizer
1466  * @brief a string tokenizer to fetch an integer
1467  * @param Source String containing tokens
1468  * @param parmnum n'th Parameter to extract
1469  * @param separator tokenizer character
1470  * @returns 0 if not found, else integer representation of the token
1471  */
1472 int StrBufExtract_int(const StrBuf* Source, int parmnum, char separator)
1473 {
1474         StrBuf tmp;
1475         char buf[64];
1476
1477         tmp.buf = buf;
1478         buf[0] = '\0';
1479         tmp.BufSize = 64;
1480         tmp.BufUsed = 0;
1481         tmp.ConstBuf = 1;
1482         if (StrBufExtract_token(&tmp, Source, parmnum, separator) > 0)
1483                 return(atoi(buf));
1484         else
1485                 return 0;
1486 }
1487
1488 /**
1489  * @ingroup StrBuf_Tokenizer
1490  * @brief a string tokenizer to fetch a long integer
1491  * @param Source String containing tokens
1492  * @param parmnum n'th Parameter to extract
1493  * @param separator tokenizer character
1494  * @returns 0 if not found, else long integer representation of the token
1495  */
1496 long StrBufExtract_long(const StrBuf* Source, int parmnum, char separator)
1497 {
1498         StrBuf tmp;
1499         char buf[64];
1500
1501         tmp.buf = buf;
1502         buf[0] = '\0';
1503         tmp.BufSize = 64;
1504         tmp.BufUsed = 0;
1505         tmp.ConstBuf = 1;
1506         if (StrBufExtract_token(&tmp, Source, parmnum, separator) > 0)
1507                 return(atoi(buf));
1508         else
1509                 return 0;
1510 }
1511
1512
1513 /**
1514  * @ingroup StrBuf_Tokenizer
1515  * @brief a string tokenizer to fetch an unsigned long
1516  * @param Source String containing tokens
1517  * @param parmnum n'th Parameter to extract
1518  * @param separator tokenizer character
1519  * @returns 0 if not found, else unsigned long representation of the token
1520  */
1521 unsigned long StrBufExtract_unsigned_long(const StrBuf* Source, int parmnum, char separator)
1522 {
1523         StrBuf tmp;
1524         char buf[64];
1525         char *pnum;
1526
1527         tmp.buf = buf;
1528         buf[0] = '\0';
1529         tmp.BufSize = 64;
1530         tmp.BufUsed = 0;
1531         tmp.ConstBuf = 1;
1532         if (StrBufExtract_token(&tmp, Source, parmnum, separator) > 0) {
1533                 pnum = &buf[0];
1534                 if (*pnum == '-')
1535                         pnum ++;
1536                 return (unsigned long) atol(pnum);
1537         }
1538         else
1539                 return 0;
1540 }
1541
1542
1543
1544 /**
1545  * @ingroup StrBuf_NextTokenizer
1546  * @brief a string tokenizer; Bounds checker
1547  *  function to make shure whether StrBufExtract_NextToken and friends have reached the end of the string.
1548  * @param Source our tokenbuffer
1549  * @param pStart the token iterator pointer to inspect
1550  * @returns whether the revolving pointer is inside of the search range
1551  */
1552 int StrBufHaveNextToken(const StrBuf *Source, const char **pStart)
1553 {
1554         if ((Source == NULL) ||
1555             (*pStart == StrBufNOTNULL) ||
1556             (Source->BufUsed == 0))
1557         {
1558                 return 0;
1559         }
1560         if (*pStart == NULL)
1561         {
1562                 return 1;
1563         }
1564         else if (*pStart > Source->buf + Source->BufUsed)
1565         {
1566                 return 0;
1567         }
1568         else if (*pStart <= Source->buf)
1569         {
1570                 return 0;
1571         }
1572
1573         return 1;
1574 }
1575
1576 /**
1577  * @ingroup StrBuf_NextTokenizer
1578  * @brief a string tokenizer
1579  * @param dest Destination StringBuffer
1580  * @param Source StringBuffer to read into
1581  * @param pStart pointer to the end of the last token. Feed with NULL on start.
1582  * @param separator tokenizer
1583  * @returns -1 if not found, else length of token.
1584  */
1585 int StrBufExtract_NextToken(StrBuf *dest, const StrBuf *Source, const char **pStart, char separator)
1586 {
1587         const char *s;          /* source */
1588         const char *EndBuffer;  /* end stop of source buffer */
1589         int current_token = 0;  /* token currently being processed */
1590         int len = 0;            /* running total length of extracted string */
1591
1592         if ((Source          == NULL) ||
1593             (Source->BufUsed == 0)      )
1594         {
1595                 *pStart = StrBufNOTNULL;
1596                 if (dest != NULL)
1597                         FlushStrBuf(dest);
1598                 return -1;
1599         }
1600
1601         EndBuffer = Source->buf + Source->BufUsed;
1602
1603         if (dest != NULL)
1604         {
1605                 dest->buf[0] = '\0';
1606                 dest->BufUsed = 0;
1607         }
1608         else
1609         {
1610                 *pStart = EndBuffer + 1;
1611                 return -1;
1612         }
1613
1614         if (*pStart == NULL)
1615         {
1616                 *pStart = Source->buf; /* we're starting to examine this buffer. */
1617         }
1618         else if ((*pStart < Source->buf) ||
1619                  (*pStart > EndBuffer  )   )
1620         {
1621                 return -1; /* no more tokens to find. */
1622         }
1623
1624         s = *pStart;
1625         /* start to find the next token */
1626         while ((s <= EndBuffer)      &&
1627                (current_token == 0) )
1628         {
1629                 if (*s == separator)
1630                 {
1631                         /* we found the next token */
1632                         ++current_token;
1633                 }
1634
1635                 if (len >= dest->BufSize)
1636                 {
1637                         /* our Dest-buffer isn't big enough, increase it. */
1638                         dest->BufUsed = len;
1639
1640                         if (IncreaseBuf(dest, 1, -1) < 0) {
1641                                 /* WHUT? no more mem? bail out. */
1642                                 s = EndBuffer;
1643                                 dest->BufUsed --;
1644                                 break;
1645                         }
1646                 }
1647
1648                 if ( (current_token == 0 ) &&   /* are we in our target token? */
1649                      (!IsEmptyStr(s)     ) &&
1650                      (separator     != *s)    ) /* don't copy the token itself */
1651                 {
1652                         dest->buf[len] = *s;    /* Copy the payload */
1653                         ++len;                  /* remember the bigger size. */
1654                 }
1655
1656                 ++s;
1657         }
1658
1659         /* did we reach the end? */
1660         if ((s > EndBuffer)) {
1661                 EndBuffer = StrBufNOTNULL;
1662                 *pStart = EndBuffer;
1663         }
1664         else {
1665                 *pStart = s;  /* remember the position for the next run */
1666         }
1667
1668         /* sanitize our extracted token */
1669         dest->buf[len] = '\0';
1670         dest->BufUsed  = len;
1671
1672         return (len);
1673 }
1674
1675
1676 /**
1677  * @ingroup StrBuf_NextTokenizer
1678  * @brief a string tokenizer
1679  * @param Source StringBuffer to read from
1680  * @param pStart pointer to the end of the last token. Feed with NULL.
1681  * @param separator tokenizer character
1682  * @param nTokens number of tokens to fastforward over
1683  * @returns -1 if not found, else length of token.
1684  */
1685 int StrBufSkip_NTokenS(const StrBuf *Source, const char **pStart, char separator, int nTokens)
1686 {
1687         const char *s, *EndBuffer;      //* source * /
1688         int len = 0;                    //* running total length of extracted string * /
1689         int current_token = 0;          //* token currently being processed * /
1690
1691         if ((Source == NULL) ||
1692             (Source->BufUsed ==0)) {
1693                 return(-1);
1694         }
1695         if (nTokens == 0)
1696                 return Source->BufUsed;
1697
1698         if (*pStart == NULL)
1699                 *pStart = Source->buf;
1700
1701         EndBuffer = Source->buf + Source->BufUsed;
1702
1703         if ((*pStart < Source->buf) ||
1704             (*pStart >  EndBuffer)) {
1705                 return (-1);
1706         }
1707
1708
1709         s = *pStart;
1710
1711         //cit_backtrace();
1712         //lprintf (CTDL_DEBUG, "test >: n: %d sep: %c source: %s \n willi \n", parmnum, separator, source);
1713
1714         while ((s < EndBuffer) && !IsEmptyStr(s)) {
1715                 if (*s == separator) {
1716                         ++current_token;
1717                 }
1718                 if (current_token >= nTokens) {
1719                         break;
1720                 }
1721                 ++s;
1722         }
1723         *pStart = s;
1724         (*pStart) ++;
1725
1726         return(len);
1727 }
1728
1729 /**
1730  * @ingroup StrBuf_NextTokenizer
1731  * @brief a string tokenizer to fetch an integer
1732  * @param Source StringBuffer to read from
1733  * @param pStart Cursor on the tokenstring
1734  * @param separator tokenizer character
1735  * @returns 0 if not found, else integer representation of the token
1736  */
1737 int StrBufExtractNext_int(const StrBuf* Source, const char **pStart, char separator)
1738 {
1739         StrBuf tmp;
1740         char buf[64];
1741
1742         tmp.buf = buf;
1743         buf[0] = '\0';
1744         tmp.BufSize = 64;
1745         tmp.BufUsed = 0;
1746         tmp.ConstBuf = 1;
1747         if (StrBufExtract_NextToken(&tmp, Source, pStart, separator) > 0)
1748                 return(atoi(buf));
1749         else
1750                 return 0;
1751 }
1752
1753 /**
1754  * @ingroup StrBuf_NextTokenizer
1755  * @brief a string tokenizer to fetch a long integer
1756  * @param Source StringBuffer to read from
1757  * @param pStart Cursor on the tokenstring
1758  * @param separator tokenizer character
1759  * @returns 0 if not found, else long integer representation of the token
1760  */
1761 long StrBufExtractNext_long(const StrBuf* Source, const char **pStart, char separator)
1762 {
1763         StrBuf tmp;
1764         char buf[64];
1765
1766         tmp.buf = buf;
1767         buf[0] = '\0';
1768         tmp.BufSize = 64;
1769         tmp.BufUsed = 0;
1770         tmp.ConstBuf = 1;
1771         if (StrBufExtract_NextToken(&tmp, Source, pStart, separator) > 0)
1772                 return(atoi(buf));
1773         else
1774                 return 0;
1775 }
1776
1777
1778 /**
1779  * @ingroup StrBuf_NextTokenizer
1780  * @brief a string tokenizer to fetch an unsigned long
1781  * @param Source StringBuffer to read from
1782  * @param pStart Cursor on the tokenstring
1783  * @param separator tokenizer character
1784  * @returns 0 if not found, else unsigned long representation of the token
1785  */
1786 unsigned long StrBufExtractNext_unsigned_long(const StrBuf* Source, const char **pStart, char separator)
1787 {
1788         StrBuf tmp;
1789         char buf[64];
1790         char *pnum;
1791
1792         tmp.buf = buf;
1793         buf[0] = '\0';
1794         tmp.BufSize = 64;
1795         tmp.BufUsed = 0;
1796         tmp.ConstBuf = 1;
1797         if (StrBufExtract_NextToken(&tmp, Source, pStart, separator) > 0) {
1798                 pnum = &buf[0];
1799                 if (*pnum == '-')
1800                         pnum ++;
1801                 return (unsigned long) atol(pnum);
1802         }
1803         else
1804                 return 0;
1805 }
1806
1807
1808
1809
1810
1811 /*******************************************************************************
1812  *                             Escape Appending                                *
1813  *******************************************************************************/
1814
1815 /**
1816  * @ingroup StrBuf_DeEnCoder
1817  * @brief Escape a string for feeding out as a URL while appending it to a Buffer
1818  * @param OutBuf the output buffer
1819  * @param In Buffer to encode
1820  * @param PlainIn way in from plain old c strings
1821  */
1822 void StrBufUrlescAppend(StrBuf *OutBuf, const StrBuf *In, const char *PlainIn)
1823 {
1824         const char *pch, *pche;
1825         char *pt, *pte;
1826         int len;
1827
1828         if (((In == NULL) && (PlainIn == NULL)) || (OutBuf == NULL) )
1829                 return;
1830         if (PlainIn != NULL) {
1831                 len = strlen(PlainIn);
1832                 pch = PlainIn;
1833                 pche = pch + len;
1834         }
1835         else {
1836                 pch = In->buf;
1837                 pche = pch + In->BufUsed;
1838                 len = In->BufUsed;
1839         }
1840
1841         if (len == 0)
1842                 return;
1843
1844         pt = OutBuf->buf + OutBuf->BufUsed;
1845         pte = OutBuf->buf + OutBuf->BufSize - 4; /**< we max append 3 chars at once plus the \0 */
1846
1847         while (pch < pche) {
1848                 if (pt >= pte) {
1849                         IncreaseBuf(OutBuf, 1, -1);
1850                         pte = OutBuf->buf + OutBuf->BufSize - 4; /**< we max append 3 chars at once plus the \0 */
1851                         pt = OutBuf->buf + OutBuf->BufUsed;
1852                 }
1853
1854                 if((*pch >= 'a' && *pch <= 'z') ||
1855                    (*pch >= '@' && *pch <= 'Z') || /* @ A-Z */
1856                    (*pch >= '0' && *pch <= ':') || /* 0-9 : */
1857                    (*pch == '!') || (*pch == '_') ||
1858                    (*pch == ',') || (*pch == '.'))
1859                 {
1860                         *(pt++) = *(pch++);
1861                         OutBuf->BufUsed++;
1862                 }
1863                 else {
1864                         *pt = '%';
1865                         *(pt + 1) = HexList[(unsigned char)*pch][0];
1866                         *(pt + 2) = HexList[(unsigned char)*pch][1];
1867                         pt += 3;
1868                         OutBuf->BufUsed += 3;
1869                         pch ++;
1870                 }
1871         }
1872         *pt = '\0';
1873 }
1874
1875 /**
1876  * @ingroup StrBuf_DeEnCoder
1877  * @brief Escape a string for feeding out as a the username/password part of an URL while appending it to a Buffer
1878  * @param OutBuf the output buffer
1879  * @param In Buffer to encode
1880  * @param PlainIn way in from plain old c strings
1881  */
1882 void StrBufUrlescUPAppend(StrBuf *OutBuf, const StrBuf *In, const char *PlainIn)
1883 {
1884         const char *pch, *pche;
1885         char *pt, *pte;
1886         int len;
1887
1888         if (((In == NULL) && (PlainIn == NULL)) || (OutBuf == NULL) )
1889                 return;
1890         if (PlainIn != NULL) {
1891                 len = strlen(PlainIn);
1892                 pch = PlainIn;
1893                 pche = pch + len;
1894         }
1895         else {
1896                 pch = In->buf;
1897                 pche = pch + In->BufUsed;
1898                 len = In->BufUsed;
1899         }
1900
1901         if (len == 0)
1902                 return;
1903
1904         pt = OutBuf->buf + OutBuf->BufUsed;
1905         pte = OutBuf->buf + OutBuf->BufSize - 4; /**< we max append 3 chars at once plus the \0 */
1906
1907         while (pch < pche) {
1908                 if (pt >= pte) {
1909                         IncreaseBuf(OutBuf, 1, -1);
1910                         pte = OutBuf->buf + OutBuf->BufSize - 4; /**< we max append 3 chars at once plus the \0 */
1911                         pt = OutBuf->buf + OutBuf->BufUsed;
1912                 }
1913
1914                 if((*pch >= 'a' && *pch <= 'z') ||
1915                    (*pch >= 'A' && *pch <= 'Z') || /* A-Z */
1916                    (*pch >= '0' && *pch <= ':') || /* 0-9 : */
1917                    (*pch == '!') || (*pch == '_') ||
1918                    (*pch == ',') || (*pch == '.'))
1919                 {
1920                         *(pt++) = *(pch++);
1921                         OutBuf->BufUsed++;
1922                 }
1923                 else {
1924                         *pt = '%';
1925                         *(pt + 1) = HexList[(unsigned char)*pch][0];
1926                         *(pt + 2) = HexList[(unsigned char)*pch][1];
1927                         pt += 3;
1928                         OutBuf->BufUsed += 3;
1929                         pch ++;
1930                 }
1931         }
1932         *pt = '\0';
1933 }
1934
1935 /**
1936  * @ingroup StrBuf_DeEnCoder
1937  * @brief append a string in hex encoding to the buffer
1938  * @param OutBuf the output buffer
1939  * @param In Buffer to encode
1940  * @param PlainIn way in from plain old c strings
1941  * @param PlainInLen way in from plain old c strings; maybe you've got binary data or know the length?
1942  */
1943 void StrBufHexEscAppend(StrBuf *OutBuf, const StrBuf *In, const unsigned char *PlainIn, long PlainInLen)
1944 {
1945         const unsigned char *pch, *pche;
1946         char *pt, *pte;
1947         int len;
1948
1949         if (((In == NULL) && (PlainIn == NULL)) || (OutBuf == NULL) )
1950                 return;
1951         if (PlainIn != NULL) {
1952                 if (PlainInLen < 0)
1953                         len = strlen((const char*)PlainIn);
1954                 else
1955                         len = PlainInLen;
1956                 pch = PlainIn;
1957                 pche = pch + len;
1958         }
1959         else {
1960                 pch = (const unsigned char*)In->buf;
1961                 pche = pch + In->BufUsed;
1962                 len = In->BufUsed;
1963         }
1964
1965         if (len == 0)
1966                 return;
1967
1968         pt = OutBuf->buf + OutBuf->BufUsed;
1969         pte = OutBuf->buf + OutBuf->BufSize - 3; /**< we max append 3 chars at once plus the \0 */
1970
1971         while (pch < pche) {
1972                 if (pt >= pte) {
1973                         IncreaseBuf(OutBuf, 1, -1);
1974                         pte = OutBuf->buf + OutBuf->BufSize - 3; /**< we max append 3 chars at once plus the \0 */
1975                         pt = OutBuf->buf + OutBuf->BufUsed;
1976                 }
1977
1978                 *pt = HexList[*pch][0];
1979                 pt ++;
1980                 *pt = HexList[*pch][1];
1981                 pt ++; pch ++; OutBuf->BufUsed += 2;
1982         }
1983         *pt = '\0';
1984 }
1985
1986 /**
1987  * @ingroup StrBuf_DeEnCoder
1988  * @brief append a string in hex encoding to the buffer
1989  * @param OutBuf the output buffer
1990  * @param In Buffer to encode
1991  * @param PlainIn way in from plain old c strings
1992  */
1993 void StrBufHexescAppend(StrBuf *OutBuf, const StrBuf *In, const char *PlainIn)
1994 {
1995         StrBufHexEscAppend(OutBuf, In, (const unsigned char*) PlainIn, -1);
1996 }
1997
1998 /**
1999  * @ingroup StrBuf_DeEnCoder
2000  * @brief Append a string, escaping characters which have meaning in HTML.
2001  *
2002  * @param Target        target buffer
2003  * @param Source        source buffer; set to NULL if you just have a C-String
2004  * @param PlainIn       Plain-C string to append; set to NULL if unused
2005  * @param nbsp          If nonzero, spaces are converted to non-breaking spaces.
2006  * @param nolinebreaks  if set to 1, linebreaks are removed from the string.
2007  *                      if set to 2, linebreaks are replaced by &ltbr/&gt
2008  */
2009 long StrEscAppend(StrBuf *Target, const StrBuf *Source, const char *PlainIn, int nbsp, int nolinebreaks)
2010 {
2011         const char *aptr, *eiptr;
2012         char *bptr, *eptr;
2013         long len;
2014
2015         if (((Source == NULL) && (PlainIn == NULL)) || (Target == NULL) )
2016                 return -1;
2017
2018         if (PlainIn != NULL) {
2019                 aptr = PlainIn;
2020                 len = strlen(PlainIn);
2021                 eiptr = aptr + len;
2022         }
2023         else {
2024                 aptr = Source->buf;
2025                 eiptr = aptr + Source->BufUsed;
2026                 len = Source->BufUsed;
2027         }
2028
2029         if (len == 0)
2030                 return -1;
2031
2032         bptr = Target->buf + Target->BufUsed;
2033         eptr = Target->buf + Target->BufSize - 11; /* our biggest unit to put in...  */
2034
2035         while (aptr < eiptr){
2036                 if(bptr >= eptr) {
2037                         IncreaseBuf(Target, 1, -1);
2038                         eptr = Target->buf + Target->BufSize - 11; /* our biggest unit to put in...  */
2039                         bptr = Target->buf + Target->BufUsed;
2040                 }
2041                 if (*aptr == '<') {
2042                         memcpy(bptr, "&lt;", 4);
2043                         bptr += 4;
2044                         Target->BufUsed += 4;
2045                 }
2046                 else if (*aptr == '>') {
2047                         memcpy(bptr, "&gt;", 4);
2048                         bptr += 4;
2049                         Target->BufUsed += 4;
2050                 }
2051                 else if (*aptr == '&') {
2052                         memcpy(bptr, "&amp;", 5);
2053                         bptr += 5;
2054                         Target->BufUsed += 5;
2055                 }
2056                 else if (*aptr == '"') {
2057                         memcpy(bptr, "&quot;", 6);
2058                         bptr += 6;
2059                         Target->BufUsed += 6;
2060                 }
2061                 else if (*aptr == '\'') {
2062                         memcpy(bptr, "&#39;", 5);
2063                         bptr += 5;
2064                         Target->BufUsed += 5;
2065                 }
2066                 else if (*aptr == LB) {
2067                         *bptr = '<';
2068                         bptr ++;
2069                         Target->BufUsed ++;
2070                 }
2071                 else if (*aptr == RB) {
2072                         *bptr = '>';
2073                         bptr ++;
2074                         Target->BufUsed ++;
2075                 }
2076                 else if (*aptr == QU) {
2077                         *bptr ='"';
2078                         bptr ++;
2079                         Target->BufUsed ++;
2080                 }
2081                 else if ((*aptr == 32) && (nbsp == 1)) {
2082                         memcpy(bptr, "&nbsp;", 6);
2083                         bptr += 6;
2084                         Target->BufUsed += 6;
2085                 }
2086                 else if ((*aptr == '\n') && (nolinebreaks == 1)) {
2087                         *bptr='\0';     /* nothing */
2088                 }
2089                 else if ((*aptr == '\n') && (nolinebreaks == 2)) {
2090                         memcpy(bptr, "&lt;br/&gt;", 11);
2091                         bptr += 11;
2092                         Target->BufUsed += 11;
2093                 }
2094
2095
2096                 else if ((*aptr == '\r') && (nolinebreaks != 0)) {
2097                         *bptr='\0';     /* nothing */
2098                 }
2099                 else{
2100                         *bptr = *aptr;
2101                         bptr++;
2102                         Target->BufUsed ++;
2103                 }
2104                 aptr ++;
2105         }
2106         *bptr = '\0';
2107         if ((bptr = eptr - 1 ) && !IsEmptyStr(aptr) )
2108                 return -1;
2109         return Target->BufUsed;
2110 }
2111
2112 /**
2113  * @ingroup StrBuf_DeEnCoder
2114  * @brief Append a string, escaping characters which have meaning in HTML.
2115  * Converts linebreaks into blanks; escapes single quotes
2116  * @param Target        target buffer
2117  * @param Source        source buffer; set to NULL if you just have a C-String
2118  * @param PlainIn       Plain-C string to append; set to NULL if unused
2119  */
2120 void StrMsgEscAppend(StrBuf *Target, const StrBuf *Source, const char *PlainIn)
2121 {
2122         const char *aptr, *eiptr;
2123         char *tptr, *eptr;
2124         long len;
2125
2126         if (((Source == NULL) && (PlainIn == NULL)) || (Target == NULL) )
2127                 return ;
2128
2129         if (PlainIn != NULL) {
2130                 aptr = PlainIn;
2131                 len = strlen(PlainIn);
2132                 eiptr = aptr + len;
2133         }
2134         else {
2135                 aptr = Source->buf;
2136                 eiptr = aptr + Source->BufUsed;
2137                 len = Source->BufUsed;
2138         }
2139
2140         if (len == 0)
2141                 return;
2142
2143         eptr = Target->buf + Target->BufSize - 8;
2144         tptr = Target->buf + Target->BufUsed;
2145
2146         while (aptr < eiptr){
2147                 if(tptr >= eptr) {
2148                         IncreaseBuf(Target, 1, -1);
2149                         eptr = Target->buf + Target->BufSize - 8;
2150                         tptr = Target->buf + Target->BufUsed;
2151                 }
2152
2153                 if (*aptr == '\n') {
2154                         *tptr = ' ';
2155                         Target->BufUsed++;
2156                 }
2157                 else if (*aptr == '\r') {
2158                         *tptr = ' ';
2159                         Target->BufUsed++;
2160                 }
2161                 else if (*aptr == '\'') {
2162                         *(tptr++) = '&';
2163                         *(tptr++) = '#';
2164                         *(tptr++) = '3';
2165                         *(tptr++) = '9';
2166                         *tptr = ';';
2167                         Target->BufUsed += 5;
2168                 } else {
2169                         *tptr = *aptr;
2170                         Target->BufUsed++;
2171                 }
2172                 tptr++; aptr++;
2173         }
2174         *tptr = '\0';
2175 }
2176
2177
2178
2179 /**
2180  * @ingroup StrBuf_DeEnCoder
2181  * @brief Append a string, escaping characters which have meaning in ICAL.
2182  * [\n,]
2183  * @param Target        target buffer
2184  * @param Source        source buffer; set to NULL if you just have a C-String
2185  * @param PlainIn       Plain-C string to append; set to NULL if unused
2186  */
2187 void StrIcalEscAppend(StrBuf *Target, const StrBuf *Source, const char *PlainIn)
2188 {
2189         const char *aptr, *eiptr;
2190         char *tptr, *eptr;
2191         long len;
2192
2193         if (((Source == NULL) && (PlainIn == NULL)) || (Target == NULL) )
2194                 return ;
2195
2196         if (PlainIn != NULL) {
2197                 aptr = PlainIn;
2198                 len = strlen(PlainIn);
2199                 eiptr = aptr + len;
2200         }
2201         else {
2202                 aptr = Source->buf;
2203                 eiptr = aptr + Source->BufUsed;
2204                 len = Source->BufUsed;
2205         }
2206
2207         if (len == 0)
2208                 return;
2209
2210         eptr = Target->buf + Target->BufSize - 8;
2211         tptr = Target->buf + Target->BufUsed;
2212
2213         while (aptr < eiptr){
2214                 if(tptr + 3 >= eptr) {
2215                         IncreaseBuf(Target, 1, -1);
2216                         eptr = Target->buf + Target->BufSize - 8;
2217                         tptr = Target->buf + Target->BufUsed;
2218                 }
2219
2220                 if (*aptr == '\n') {
2221                         *tptr = '\\';
2222                         Target->BufUsed++;
2223                         tptr++;
2224                         *tptr = 'n';
2225                         Target->BufUsed++;
2226                 }
2227                 else if (*aptr == '\r') {
2228                         *tptr = '\\';
2229                         Target->BufUsed++;
2230                         tptr++;
2231                         *tptr = 'r';
2232                         Target->BufUsed++;
2233                 }
2234                 else if (*aptr == ',') {
2235                         *tptr = '\\';
2236                         Target->BufUsed++;
2237                         tptr++;
2238                         *tptr = ',';
2239                         Target->BufUsed++;
2240                 } else {
2241                         *tptr = *aptr;
2242                         Target->BufUsed++;
2243                 }
2244                 tptr++; aptr++;
2245         }
2246         *tptr = '\0';
2247 }
2248
2249 /**
2250  * @ingroup StrBuf_DeEnCoder
2251  * @brief Append a string, escaping characters which have meaning in JavaScript strings .
2252  *
2253  * @param Target        target buffer
2254  * @param Source        source buffer; set to NULL if you just have a C-String
2255  * @param PlainIn       Plain-C string to append; set to NULL if unused
2256  * @returns size of result or -1
2257  */
2258 long StrECMAEscAppend(StrBuf *Target, const StrBuf *Source, const char *PlainIn)
2259 {
2260         const char *aptr, *eiptr;
2261         char *bptr, *eptr;
2262         long len;
2263         int IsUtf8Sequence;
2264
2265         if (((Source == NULL) && (PlainIn == NULL)) || (Target == NULL) )
2266                 return -1;
2267
2268         if (PlainIn != NULL) {
2269                 aptr = PlainIn;
2270                 len = strlen(PlainIn);
2271                 eiptr = aptr + len;
2272         }
2273         else {
2274                 aptr = Source->buf;
2275                 eiptr = aptr + Source->BufUsed;
2276                 len = Source->BufUsed;
2277         }
2278
2279         if (len == 0)
2280                 return -1;
2281
2282         bptr = Target->buf + Target->BufUsed;
2283         eptr = Target->buf + Target->BufSize - 7; /* our biggest unit to put in...  */
2284
2285         while (aptr < eiptr){
2286                 if(bptr >= eptr) {
2287                         IncreaseBuf(Target, 1, -1);
2288                         eptr = Target->buf + Target->BufSize - 7; /* our biggest unit to put in...  */
2289                         bptr = Target->buf + Target->BufUsed;
2290                 }
2291                 switch (*aptr) {
2292                 case '\n':
2293                         memcpy(bptr, HKEY("\\n"));
2294                         bptr += 2;
2295                         Target->BufUsed += 2;
2296                         break;
2297                 case '\r':
2298                         memcpy(bptr, HKEY("\\r"));
2299                         bptr += 2;
2300                         Target->BufUsed += 2;
2301                         break;
2302                 case '"':
2303                         *bptr = '\\';
2304                         bptr ++;
2305                         *bptr = '"';
2306                         bptr ++;
2307                         Target->BufUsed += 2;
2308                         break;
2309                 case '\\':
2310                         if ((*(aptr + 1) == 'u') &&
2311                             isxdigit(*(aptr + 2)) &&
2312                             isxdigit(*(aptr + 3)) &&
2313                             isxdigit(*(aptr + 4)) &&
2314                             isxdigit(*(aptr + 5)))
2315                         { /* oh, a unicode escaper. let it pass through. */
2316                                 memcpy(bptr, aptr, 6);
2317                                 aptr += 5;
2318                                 bptr +=6;
2319                                 Target->BufUsed += 6;
2320                         }
2321                         else
2322                         {
2323                                 *bptr = '\\';
2324                                 bptr ++;
2325                                 *bptr = '\\';
2326                                 bptr ++;
2327                                 Target->BufUsed += 2;
2328                         }
2329                         break;
2330                 case '\b':
2331                         *bptr = '\\';
2332                         bptr ++;
2333                         *bptr = 'b';
2334                         bptr ++;
2335                         Target->BufUsed += 2;
2336                         break;
2337                 case '\f':
2338                         *bptr = '\\';
2339                         bptr ++;
2340                         *bptr = 'f';
2341                         bptr ++;
2342                         Target->BufUsed += 2;
2343                         break;
2344                 case '\t':
2345                         *bptr = '\\';
2346                         bptr ++;
2347                         *bptr = 't';
2348                         bptr ++;
2349                         Target->BufUsed += 2;
2350                         break;
2351                 default:
2352                         IsUtf8Sequence =  Ctdl_GetUtf8SequenceLength(aptr, eiptr);
2353                         while (IsUtf8Sequence > 0){
2354                                 *bptr = *aptr;
2355                                 Target->BufUsed ++;
2356                                 if (--IsUtf8Sequence)
2357                                         aptr++;
2358                                 bptr++;
2359                         }
2360                 }
2361                 aptr ++;
2362         }
2363         *bptr = '\0';
2364         if ((bptr == eptr - 1 ) && !IsEmptyStr(aptr) )
2365                 return -1;
2366         return Target->BufUsed;
2367 }
2368
2369 /**
2370  * @ingroup StrBuf_DeEnCoder
2371  * @brief Append a string, escaping characters which have meaning in HTML + json.
2372  *
2373  * @param Target        target buffer
2374  * @param Source        source buffer; set to NULL if you just have a C-String
2375  * @param PlainIn       Plain-C string to append; set to NULL if unused
2376  * @param nbsp          If nonzero, spaces are converted to non-breaking spaces.
2377  * @param nolinebreaks  if set to 1, linebreaks are removed from the string.
2378  *                      if set to 2, linebreaks are replaced by &ltbr/&gt
2379  */
2380 long StrHtmlEcmaEscAppend(StrBuf *Target, const StrBuf *Source, const char *PlainIn, int nbsp, int nolinebreaks)
2381 {
2382         const char *aptr, *eiptr;
2383         char *bptr, *eptr;
2384         long len;
2385         int IsUtf8Sequence = 0;
2386
2387         if (((Source == NULL) && (PlainIn == NULL)) || (Target == NULL) )
2388                 return -1;
2389
2390         if (PlainIn != NULL) {
2391                 aptr = PlainIn;
2392                 len = strlen(PlainIn);
2393                 eiptr = aptr + len;
2394         }
2395         else {
2396                 aptr = Source->buf;
2397                 eiptr = aptr + Source->BufUsed;
2398                 len = Source->BufUsed;
2399         }
2400
2401         if (len == 0)
2402                 return -1;
2403
2404         bptr = Target->buf + Target->BufUsed;
2405         eptr = Target->buf + Target->BufSize - 11; /* our biggest unit to put in...  */
2406
2407         while (aptr < eiptr){
2408                 if(bptr >= eptr) {
2409                         IncreaseBuf(Target, 1, -1);
2410                         eptr = Target->buf + Target->BufSize - 11; /* our biggest unit to put in...  */
2411                         bptr = Target->buf + Target->BufUsed;
2412                 }
2413                 switch (*aptr) {
2414                 case '<':
2415                         memcpy(bptr, HKEY("&lt;"));
2416                         bptr += 4;
2417                         Target->BufUsed += 4;
2418                         break;
2419                 case '>':
2420                         memcpy(bptr, HKEY("&gt;"));
2421                         bptr += 4;
2422                         Target->BufUsed += 4;
2423                         break;
2424                 case '&':
2425                         memcpy(bptr, HKEY("&amp;"));
2426                         bptr += 5;
2427                         Target->BufUsed += 5;
2428                         break;
2429                 case LB:
2430                         *bptr = '<';
2431                         bptr ++;
2432                         Target->BufUsed ++;
2433                         break;
2434                 case RB:
2435                         *bptr = '>';
2436                         bptr ++;
2437                         Target->BufUsed ++;
2438                         break;
2439                 case '\n':
2440                         switch (nolinebreaks) {
2441                         case 1:
2442                                 *bptr='\0';     /* nothing */
2443                                 break;
2444                         case 2:
2445                                 memcpy(bptr, HKEY("&lt;br/&gt;"));
2446                                 bptr += 11;
2447                                 Target->BufUsed += 11;
2448                                 break;
2449                         default:
2450                                 memcpy(bptr, HKEY("\\n"));
2451                                 bptr += 2;
2452                                 Target->BufUsed += 2;
2453                         }
2454                         break;
2455                 case '\r':
2456                         switch (nolinebreaks) {
2457                         case 1:
2458                         case 2:
2459                                 *bptr='\0';     /* nothing */
2460                                 break;
2461                         default:
2462                                 memcpy(bptr, HKEY("\\r"));
2463                                 bptr += 2;
2464                                 Target->BufUsed += 2;
2465                                 break;
2466                         }
2467                         break;
2468                 case '"':
2469                 case QU:
2470                         *bptr = '\\';
2471                         bptr ++;
2472                         *bptr = '"';
2473                         bptr ++;
2474                         Target->BufUsed += 2;
2475                         break;
2476                 case '\\':
2477                         if ((*(aptr + 1) == 'u') &&
2478                             isxdigit(*(aptr + 2)) &&
2479                             isxdigit(*(aptr + 3)) &&
2480                             isxdigit(*(aptr + 4)) &&
2481                             isxdigit(*(aptr + 5)))
2482                         { /* oh, a unicode escaper. let it pass through. */
2483                                 memcpy(bptr, aptr, 6);
2484                                 aptr += 5;
2485                                 bptr +=6;
2486                                 Target->BufUsed += 6;
2487                         }
2488                         else
2489                         {
2490                                 *bptr = '\\';
2491                                 bptr ++;
2492                                 *bptr = '\\';
2493                                 bptr ++;
2494                                 Target->BufUsed += 2;
2495                         }
2496                         break;
2497                 case '\b':
2498                         *bptr = '\\';
2499                         bptr ++;
2500                         *bptr = 'b';
2501                         bptr ++;
2502                         Target->BufUsed += 2;
2503                         break;
2504                 case '\f':
2505                         *bptr = '\\';
2506                         bptr ++;
2507                         *bptr = 'f';
2508                         bptr ++;
2509                         Target->BufUsed += 2;
2510                         break;
2511                 case '\t':
2512                         *bptr = '\\';
2513                         bptr ++;
2514                         *bptr = 't';
2515                         bptr ++;
2516                         Target->BufUsed += 2;
2517                         break;
2518                 case  32:
2519                         if (nbsp == 1) {
2520                                 memcpy(bptr, HKEY("&nbsp;"));
2521                                 bptr += 6;
2522                                 Target->BufUsed += 6;
2523                                 break;
2524                         }
2525                 default:
2526                         IsUtf8Sequence =  Ctdl_GetUtf8SequenceLength(aptr, eiptr);
2527                         while (IsUtf8Sequence > 0){
2528                                 *bptr = *aptr;
2529                                 Target->BufUsed ++;
2530                                 if (--IsUtf8Sequence)
2531                                         aptr++;
2532                                 bptr++;
2533                         }
2534                 }
2535                 aptr ++;
2536         }
2537         *bptr = '\0';
2538         if ((bptr = eptr - 1 ) && !IsEmptyStr(aptr) )
2539                 return -1;
2540         return Target->BufUsed;
2541 }
2542
2543 /**
2544  * @ingroup StrBuf_DeEnCoder
2545  * @brief unhide special chars hidden to the HTML escaper
2546  * @param target buffer to put the unescaped string in
2547  * @param source buffer to unescape
2548  */
2549 void StrBufEUid_unescapize(StrBuf *target, const StrBuf *source)
2550 {
2551         int a, b, len;
2552         char hex[3];
2553
2554         if ((source == NULL) || (target == NULL) || (target->buf == NULL))
2555         {
2556                 return;
2557         }
2558
2559         if (target != NULL)
2560                 FlushStrBuf(target);
2561
2562         len = source->BufUsed;
2563         for (a = 0; a < len; ++a) {
2564                 if (target->BufUsed >= target->BufSize)
2565                         IncreaseBuf(target, 1, -1);
2566
2567                 if (source->buf[a] == '=') {
2568                         hex[0] = source->buf[a + 1];
2569                         hex[1] = source->buf[a + 2];
2570                         hex[2] = 0;
2571                         b = 0;
2572                         sscanf(hex, "%02x", &b);
2573                         target->buf[target->BufUsed] = b;
2574                         target->buf[++target->BufUsed] = 0;
2575                         a += 2;
2576                 }
2577                 else {
2578                         target->buf[target->BufUsed] = source->buf[a];
2579                         target->buf[++target->BufUsed] = 0;
2580                 }
2581         }
2582 }
2583
2584
2585 /**
2586  * @ingroup StrBuf_DeEnCoder
2587  * @brief hide special chars from the HTML escapers and friends
2588  * @param target buffer to put the escaped string in
2589  * @param source buffer to escape
2590  */
2591 void StrBufEUid_escapize(StrBuf *target, const StrBuf *source)
2592 {
2593         int i, len;
2594
2595         if (target != NULL)
2596                 FlushStrBuf(target);
2597
2598         if ((source == NULL) || (target == NULL) || (target->buf == NULL))
2599         {
2600                 return;
2601         }
2602
2603         len = source->BufUsed;
2604         for (i=0; i<len; ++i) {
2605                 if (target->BufUsed + 4 >= target->BufSize)
2606                         IncreaseBuf(target, 1, -1);
2607                 if ( (isalnum(source->buf[i])) ||
2608                      (source->buf[i]=='-') ||
2609                      (source->buf[i]=='_') ) {
2610                         target->buf[target->BufUsed++] = source->buf[i];
2611                 }
2612                 else {
2613                         sprintf(&target->buf[target->BufUsed],
2614                                 "=%02X",
2615                                 (0xFF &source->buf[i]));
2616                         target->BufUsed += 3;
2617                 }
2618         }
2619         target->buf[target->BufUsed + 1] = '\0';
2620 }
2621
2622
2623 /*******************************************************************************
2624  *                      Quoted Printable de/encoding                           *
2625  *******************************************************************************/
2626
2627 /**
2628  * @ingroup StrBuf_DeEnCoder
2629  * @brief decode a buffer from base 64 encoding; destroys original
2630  * @param Buf Buffor to transform
2631  */
2632 int StrBufDecodeBase64(StrBuf *Buf)
2633 {
2634         char *xferbuf;
2635         size_t siz;
2636
2637         if (Buf == NULL)
2638                 return -1;
2639
2640         xferbuf = (char*) malloc(Buf->BufSize);
2641         if (xferbuf == NULL)
2642                 return -1;
2643
2644         *xferbuf = '\0';
2645         siz = CtdlDecodeBase64(xferbuf,
2646                                Buf->buf,
2647                                Buf->BufUsed);
2648         free(Buf->buf);
2649         Buf->buf = xferbuf;
2650         Buf->BufUsed = siz;
2651         return siz;
2652 }
2653
2654 /**
2655  * @ingroup StrBuf_DeEnCoder
2656  * @brief decode a buffer from base 64 encoding; destroys original
2657  * @param Buf Buffor to transform
2658  */
2659 int StrBufDecodeHex(StrBuf *Buf)
2660 {
2661         unsigned int ch;
2662         char *pch, *pche, *pchi;
2663
2664         if (Buf == NULL) return -1;
2665
2666         pch = pchi = Buf->buf;
2667         pche = pch + Buf->BufUsed;
2668
2669         while (pchi < pche){
2670                 ch = decode_hex(pchi);
2671                 *pch = ch;
2672                 pch ++;
2673                 pchi += 2;
2674         }
2675
2676         *pch = '\0';
2677         Buf->BufUsed = pch - Buf->buf;
2678         return Buf->BufUsed;
2679 }
2680
2681 /**
2682  * @ingroup StrBuf_DeEnCoder
2683  * @brief replace all chars >0x20 && < 0x7F with Mute
2684  * @param Mute char to put over invalid chars
2685  * @param Buf Buffor to transform
2686  */
2687 int StrBufSanitizeAscii(StrBuf *Buf, const char Mute)
2688 {
2689         unsigned char *pch;
2690
2691         if (Buf == NULL) return -1;
2692         pch = (unsigned char *)Buf->buf;
2693         while (pch < (unsigned char *)Buf->buf + Buf->BufUsed) {
2694                 if ((*pch < 0x20) || (*pch > 0x7F))
2695                         *pch = Mute;
2696                 pch ++;
2697         }
2698         return Buf->BufUsed;
2699 }
2700
2701
2702 /**
2703  * @ingroup StrBuf_DeEnCoder
2704  * @brief remove escaped strings from i.e. the url string (like %20 for blanks)
2705  * @param Buf Buffer to translate
2706  * @param StripBlanks Reduce several blanks to one?
2707  */
2708 long StrBufUnescape(StrBuf *Buf, int StripBlanks)
2709 {
2710         int a, b;
2711         char hex[3];
2712         long len;
2713
2714         if (Buf == NULL)
2715                 return -1;
2716
2717         while ((Buf->BufUsed > 0) && (isspace(Buf->buf[Buf->BufUsed - 1]))){
2718                 Buf->buf[Buf->BufUsed - 1] = '\0';
2719                 Buf->BufUsed --;
2720         }
2721
2722         a = 0;
2723         while (a < Buf->BufUsed) {
2724                 if (Buf->buf[a] == '+')
2725                         Buf->buf[a] = ' ';
2726                 else if (Buf->buf[a] == '%') {
2727                         /* don't let % chars through, rather truncate the input. */
2728                         if (a + 2 > Buf->BufUsed) {
2729                                 Buf->buf[a] = '\0';
2730                                 Buf->BufUsed = a;
2731                         }
2732                         else {
2733                                 hex[0] = Buf->buf[a + 1];
2734                                 hex[1] = Buf->buf[a + 2];
2735                                 hex[2] = 0;
2736                                 b = 0;
2737                                 sscanf(hex, "%02x", &b);
2738                                 Buf->buf[a] = (char) b;
2739                                 len = Buf->BufUsed - a - 2;
2740                                 if (len > 0)
2741                                         memmove(&Buf->buf[a + 1], &Buf->buf[a + 3], len);
2742
2743                                 Buf->BufUsed -=2;
2744                         }
2745                 }
2746                 a++;
2747         }
2748         return a;
2749 }
2750
2751
2752 /**
2753  * @ingroup StrBuf_DeEnCoder
2754  * @brief       RFC2047-encode a header field if necessary.
2755  *              If no non-ASCII characters are found, the string
2756  *              will be copied verbatim without encoding.
2757  *
2758  * @param       target          Target buffer.
2759  * @param       source          Source string to be encoded.
2760  * @returns     encoded length; -1 if non success.
2761  */
2762 int StrBufRFC2047encode(StrBuf **target, const StrBuf *source)
2763 {
2764         const char headerStr[] = "=?UTF-8?Q?";
2765         int need_to_encode = 0;
2766         int i = 0;
2767         unsigned char ch;
2768
2769         if ((source == NULL) ||
2770             (target == NULL))
2771             return -1;
2772
2773         while ((i < source->BufUsed) &&
2774                (!IsEmptyStr (&source->buf[i])) &&
2775                (need_to_encode == 0)) {
2776                 if (((unsigned char) source->buf[i] < 32) ||
2777                     ((unsigned char) source->buf[i] > 126)) {
2778                         need_to_encode = 1;
2779                 }
2780                 i++;
2781         }
2782
2783         if (!need_to_encode) {
2784                 if (*target == NULL) {
2785                         *target = NewStrBufPlain(source->buf, source->BufUsed);
2786                 }
2787                 else {
2788                         FlushStrBuf(*target);
2789                         StrBufAppendBuf(*target, source, 0);
2790                 }
2791                 if (*target != 0)
2792                         return (*target)->BufUsed;
2793                 else
2794                         return 0;
2795         }
2796         if (*target == NULL)
2797                 *target = NewStrBufPlain(NULL, sizeof(headerStr) + source->BufUsed * 2);
2798         else if (sizeof(headerStr) + source->BufUsed >= (*target)->BufSize)
2799                 IncreaseBuf(*target, sizeof(headerStr) + source->BufUsed, 0);
2800         memcpy ((*target)->buf, headerStr, sizeof(headerStr) - 1);
2801         (*target)->BufUsed = sizeof(headerStr) - 1;
2802         for (i=0; (i < source->BufUsed); ++i) {
2803                 if ((*target)->BufUsed + 4 >= (*target)->BufSize)
2804                         IncreaseBuf(*target, 1, 0);
2805                 ch = (unsigned char) source->buf[i];
2806                 if ((ch  <  32) ||
2807                     (ch  > 126) ||
2808                     (ch ==  61) ||
2809                     (ch == '=') ||
2810                     (ch == '?') ||
2811                     (ch == '_') ||
2812                     (ch == '[') ||
2813                     (ch == ']')   )
2814                 {
2815                         sprintf(&(*target)->buf[(*target)->BufUsed], "=%02X", ch);
2816                         (*target)->BufUsed += 3;
2817                 }
2818                 else {
2819                         if (ch == ' ')
2820                                 (*target)->buf[(*target)->BufUsed] = '_';
2821                         else
2822                                 (*target)->buf[(*target)->BufUsed] = ch;
2823                         (*target)->BufUsed++;
2824                 }
2825         }
2826
2827         if ((*target)->BufUsed + 4 >= (*target)->BufSize)
2828                 IncreaseBuf(*target, 1, 0);
2829
2830         (*target)->buf[(*target)->BufUsed++] = '?';
2831         (*target)->buf[(*target)->BufUsed++] = '=';
2832         (*target)->buf[(*target)->BufUsed] = '\0';
2833         return (*target)->BufUsed;;
2834 }
2835
2836
2837
2838 static void AddRecipient(StrBuf *Target,
2839                          StrBuf *UserName,
2840                          StrBuf *EmailAddress,
2841                          StrBuf *EncBuf)
2842 {
2843         int QuoteMe = 0;
2844
2845         if (StrLength(Target) > 0) StrBufAppendBufPlain(Target, HKEY(", "), 0);
2846         if (strchr(ChrPtr(UserName), ',') != NULL) QuoteMe = 1;
2847
2848         if (QuoteMe)  StrBufAppendBufPlain(Target, HKEY("\""), 0);
2849         StrBufRFC2047encode(&EncBuf, UserName);
2850         StrBufAppendBuf(Target, EncBuf, 0);
2851         if (QuoteMe)  StrBufAppendBufPlain(Target, HKEY("\" "), 0);
2852         else          StrBufAppendBufPlain(Target, HKEY(" "), 0);
2853
2854         if (StrLength(EmailAddress) > 0){
2855                 StrBufAppendBufPlain(Target, HKEY("<"), 0);
2856                 StrBufAppendBuf(Target, EmailAddress, 0); /* TODO: what about IDN???? */
2857                 StrBufAppendBufPlain(Target, HKEY(">"), 0);
2858         }
2859 }
2860
2861
2862 /**
2863  * \brief QP encode parts of an email TO/CC/BCC vector, and strip/filter invalid parts
2864  * \param Recp Source list of email recipients
2865  * \param UserName Temporary buffer for internal use; Please provide valid buffer.
2866  * \param EmailAddress Temporary buffer for internal use; Please provide valid buffer.
2867  * \param EncBuf Temporary buffer for internal use; Please provide valid buffer.
2868  * \returns encoded & sanitized buffer with the contents of Recp; Caller owns this memory.
2869  */
2870 StrBuf *StrBufSanitizeEmailRecipientVector(const StrBuf *Recp,
2871                                            StrBuf *UserName,
2872                                            StrBuf *EmailAddress,
2873                                            StrBuf *EncBuf)
2874 {
2875         StrBuf *Target;
2876         const char *pch, *pche;
2877         const char *UserStart, *UserEnd, *EmailStart, *EmailEnd, *At;
2878
2879         if ((Recp == NULL) || (StrLength(Recp) == 0))
2880                 return NULL;
2881
2882         pch = ChrPtr(Recp);
2883         pche = pch + StrLength(Recp);
2884
2885         if (!CheckEncode(pch, -1, pche))
2886                 return NewStrBufDup(Recp);
2887
2888         Target = NewStrBufPlain(NULL, StrLength(Recp));
2889
2890         while ((pch != NULL) && (pch < pche))
2891         {
2892                 while (isspace(*pch)) pch++;
2893                 UserEnd = EmailStart = EmailEnd = NULL;
2894
2895                 if ((*pch == '"') || (*pch == '\'')) {
2896                         UserStart = pch + 1;
2897
2898                         UserEnd = strchr(UserStart, *pch);
2899                         if (UserEnd == NULL)
2900                                 break; ///TODO: Userfeedback??
2901                         EmailStart = UserEnd + 1;
2902                         while (isspace(*EmailStart))
2903                                 EmailStart++;
2904                         if (UserEnd == UserStart) {
2905                                 UserStart = UserEnd = NULL;
2906                         }
2907
2908                         if (*EmailStart == '<') {
2909                                 EmailStart++;
2910                                 EmailEnd = strchr(EmailStart, '>');
2911                                 if (EmailEnd == NULL)
2912                                         EmailEnd = strchr(EmailStart, ',');
2913
2914                         }
2915                         else {
2916                                 EmailEnd = strchr(EmailStart, ',');
2917                         }
2918                         if (EmailEnd == NULL)
2919                                 EmailEnd = pche;
2920                         pch = EmailEnd + 1;
2921                 }
2922                 else {
2923                         int gt = 0;
2924                         UserStart = pch;
2925                         EmailEnd = strchr(UserStart, ',');
2926                         if (EmailEnd == NULL) {
2927                                 EmailEnd = strchr(pch, '>');
2928                                 pch = NULL;
2929                                 if (EmailEnd != NULL) {
2930                                         gt = 1;
2931                                 }
2932                                 else {
2933                                         EmailEnd = pche;
2934                                 }
2935                         }
2936                         else {
2937
2938                                 pch = EmailEnd + 1;
2939                                 while ((EmailEnd > UserStart) && !gt &&
2940                                        ((*EmailEnd == ',') ||
2941                                         (*EmailEnd == '>') ||
2942                                         (isspace(*EmailEnd))))
2943                                 {
2944                                         if (*EmailEnd == '>')
2945                                                 gt = 1;
2946                                         else
2947                                                 EmailEnd--;
2948                                 }
2949                                 if (EmailEnd == UserStart)
2950                                         break;
2951                         }
2952                         if (gt) {
2953                                 EmailStart = strchr(UserStart, '<');
2954                                 if ((EmailStart == NULL) || (EmailStart > EmailEnd))
2955                                         break;
2956                                 UserEnd = EmailStart;
2957
2958                                 while ((UserEnd > UserStart) &&
2959                                        isspace (*(UserEnd - 1)))
2960                                         UserEnd --;
2961                                 EmailStart ++;
2962                                 if (UserStart >= UserEnd)
2963                                         UserStart = UserEnd = NULL;
2964                         }
2965                         else { /* this is a local recipient... no domain, just a realname */
2966                                 EmailStart = UserStart;
2967                                 At = strchr(EmailStart, '@');
2968                                 if (At == NULL) {
2969                                         UserEnd = EmailEnd;
2970                                         EmailEnd = NULL;
2971                                 }
2972                                 else {
2973                                         EmailStart = UserStart;
2974                                         UserStart = NULL;
2975                                 }
2976                         }
2977                 }
2978
2979                 if ((UserStart != NULL) && (UserEnd != NULL))
2980                         StrBufPlain(UserName, UserStart, UserEnd - UserStart);
2981                 else if ((UserStart != NULL) && (UserEnd == NULL))
2982                         StrBufPlain(UserName, UserStart, UserEnd - UserStart);
2983                 else
2984                         FlushStrBuf(UserName);
2985
2986                 if ((EmailStart != NULL) && (EmailEnd != NULL))
2987                         StrBufPlain(EmailAddress, EmailStart, EmailEnd - EmailStart);
2988                 else if ((EmailStart != NULL) && (EmailEnd == NULL))
2989                         StrBufPlain(EmailAddress, EmailStart, EmailEnd - pche);
2990                 else
2991                         FlushStrBuf(EmailAddress);
2992
2993                 AddRecipient(Target, UserName, EmailAddress, EncBuf);
2994
2995                 if (pch == NULL)
2996                         break;
2997
2998                 if ((pch != NULL) && (*pch == ','))
2999                         pch ++;
3000                 if (pch != NULL) while (isspace(*pch))
3001                         pch ++;
3002         }
3003         return Target;
3004 }
3005
3006
3007 /**
3008  * @ingroup StrBuf
3009  * @brief replaces all occurances of 'search' by 'replace'
3010  * @param buf Buffer to modify
3011  * @param search character to search
3012  * @param replace character to replace search by
3013  */
3014 void StrBufReplaceChars(StrBuf *buf, char search, char replace)
3015 {
3016         long i;
3017         if (buf == NULL)
3018                 return;
3019         for (i=0; i<buf->BufUsed; i++)
3020                 if (buf->buf[i] == search)
3021                         buf->buf[i] = replace;
3022
3023 }
3024
3025 /**
3026  * @ingroup StrBuf
3027  * @brief removes all \\r s from the string, or replaces them with \n if its not a combination of both.
3028  * @param buf Buffer to modify
3029  */
3030 void StrBufToUnixLF(StrBuf *buf)
3031 {
3032         char *pche, *pchS, *pchT;
3033         if (buf == NULL)
3034                 return;
3035
3036         pche = buf->buf + buf->BufUsed;
3037         pchS = pchT = buf->buf;
3038         while (pchS < pche)
3039         {
3040                 if (*pchS == '\r')
3041                 {
3042                         pchS ++;
3043                         if (*pchS != '\n') {
3044                                 *pchT = '\n';
3045                                 pchT++;
3046                         }
3047                 }
3048                 *pchT = *pchS;
3049                 pchT++; pchS++;
3050         }
3051         *pchT = '\0';
3052         buf->BufUsed = pchT - buf->buf;
3053 }
3054
3055
3056 /*******************************************************************************
3057  *                 Iconv Wrapper; RFC822 de/encoding                           *
3058  *******************************************************************************/
3059
3060 /**
3061  * @ingroup StrBuf_DeEnCoder
3062  * @brief Wrapper around iconv_open()
3063  * Our version adds aliases for non-standard Microsoft charsets
3064  * such as 'MS950', aliasing them to names like 'CP950'
3065  *
3066  * @param tocode        Target encoding
3067  * @param fromcode      Source encoding
3068  * @param pic           anonimized pointer to iconv struct
3069  */
3070 void  ctdl_iconv_open(const char *tocode, const char *fromcode, void *pic)
3071 {
3072 #ifdef HAVE_ICONV
3073         iconv_t ic = (iconv_t)(-1) ;
3074         ic = iconv_open(tocode, fromcode);
3075         if (ic == (iconv_t)(-1) ) {
3076                 char alias_fromcode[64];
3077                 if ( (strlen(fromcode) == 5) && (!strncasecmp(fromcode, "MS", 2)) ) {
3078                         safestrncpy(alias_fromcode, fromcode, sizeof alias_fromcode);
3079                         alias_fromcode[0] = 'C';
3080                         alias_fromcode[1] = 'P';
3081                         ic = iconv_open(tocode, alias_fromcode);
3082                 }
3083         }
3084         *(iconv_t *)pic = ic;
3085 #endif
3086 }
3087
3088
3089 /**
3090  * @ingroup StrBuf_DeEnCoder
3091  * @brief find one chunk of a RFC822 encoded string
3092  * @param Buffer where to search
3093  * @param bptr where to start searching
3094  * @returns found position, NULL if none.
3095  */
3096 static inline const char *FindNextEnd (const StrBuf *Buf, const char *bptr)
3097 {
3098         const char * end;
3099         /* Find the next ?Q? */
3100         if (Buf->BufUsed - (bptr - Buf->buf)  < 6)
3101                 return NULL;
3102
3103         end = strchr(bptr + 2, '?');
3104
3105         if (end == NULL)
3106                 return NULL;
3107
3108         if ((Buf->BufUsed - (end - Buf->buf) > 3) &&
3109             (((*(end + 1) == 'B') || (*(end + 1) == 'Q')) ||
3110              ((*(end + 1) == 'b') || (*(end + 1) == 'q'))) &&
3111             (*(end + 2) == '?')) {
3112                 /* skip on to the end of the cluster, the next ?= */
3113                 end = strstr(end + 3, "?=");
3114         }
3115         else
3116                 /* sort of half valid encoding, try to find an end. */
3117                 end = strstr(bptr, "?=");
3118         return end;
3119 }
3120
3121
3122
3123 /**
3124  * @ingroup StrBuf_DeEnCoder
3125  * @brief convert one buffer according to the preselected iconv pointer PIC
3126  * @param ConvertBuf buffer we need to translate
3127  * @param TmpBuf To share a workbuffer over several iterations. prepare to have it filled with useless stuff afterwards.
3128  * @param pic Pointer to the iconv-session Object
3129  */
3130 void StrBufConvert(StrBuf *ConvertBuf, StrBuf *TmpBuf, void *pic)
3131 {
3132 #ifdef HAVE_ICONV
3133         long trycount = 0;
3134         size_t siz;
3135         iconv_t ic;
3136         char *ibuf;                     /**< Buffer of characters to be converted */
3137         char *obuf;                     /**< Buffer for converted characters */
3138         size_t ibuflen;                 /**< Length of input buffer */
3139         size_t obuflen;                 /**< Length of output buffer */
3140
3141
3142         if ((ConvertBuf == NULL) || (TmpBuf == NULL))
3143                 return;
3144
3145         /* since we're converting to utf-8, one glyph may take up to 6 bytes */
3146         if (ConvertBuf->BufUsed * 6 >= TmpBuf->BufSize)
3147                 IncreaseBuf(TmpBuf, 0, ConvertBuf->BufUsed * 6);
3148 TRYAGAIN:
3149         ic = *(iconv_t*)pic;
3150         ibuf = ConvertBuf->buf;
3151         ibuflen = ConvertBuf->BufUsed;
3152         obuf = TmpBuf->buf;
3153         obuflen = TmpBuf->BufSize;
3154
3155         siz = iconv(ic, &ibuf, &ibuflen, &obuf, &obuflen);
3156
3157         if (siz < 0) {
3158                 if (errno == E2BIG) {
3159                         trycount ++;
3160                         IncreaseBuf(TmpBuf, 0, 0);
3161                         if (trycount < 5)
3162                                 goto TRYAGAIN;
3163
3164                 }
3165                 else if (errno == EILSEQ){
3166                         /* hm, invalid utf8 sequence... what to do now? */
3167                         /* An invalid multibyte sequence has been encountered in the input */
3168                 }
3169                 else if (errno == EINVAL) {
3170                         /* An incomplete multibyte sequence has been encountered in the input. */
3171                 }
3172
3173                 FlushStrBuf(TmpBuf);
3174         }
3175         else {
3176                 TmpBuf->BufUsed = TmpBuf->BufSize - obuflen;
3177                 TmpBuf->buf[TmpBuf->BufUsed] = '\0';
3178
3179                 /* little card game: wheres the red lady? */
3180                 SwapBuffers(ConvertBuf, TmpBuf);
3181                 FlushStrBuf(TmpBuf);
3182         }
3183 #endif
3184 }
3185
3186
3187 /**
3188  * @ingroup StrBuf_DeEnCoder
3189  * @brief catches one RFC822 encoded segment, and decodes it.
3190  * @param Target buffer to fill with result
3191  * @param DecodeMe buffer with stuff to process
3192  * @param SegmentStart points to our current segment in DecodeMe
3193  * @param SegmentEnd Points to the end of our current segment in DecodeMe
3194  * @param ConvertBuf Workbuffer shared between several iterations. Random content; needs to be valid
3195  * @param ConvertBuf2 Workbuffer shared between several iterations. Random content; needs to be valid
3196  * @param FoundCharset Characterset to default decoding to; if we find another we will overwrite it.
3197  */
3198 inline static void DecodeSegment(StrBuf *Target,
3199                                  const StrBuf *DecodeMe,
3200                                  const char *SegmentStart,
3201                                  const char *SegmentEnd,
3202                                  StrBuf *ConvertBuf,
3203                                  StrBuf *ConvertBuf2,
3204                                  StrBuf *FoundCharset)
3205 {
3206         StrBuf StaticBuf;
3207         char charset[128];
3208         char encoding[16];
3209 #ifdef HAVE_ICONV
3210         iconv_t ic = (iconv_t)(-1);
3211 #else
3212         void *ic = NULL;
3213 #endif
3214         /* Now we handle foreign character sets properly encoded
3215          * in RFC2047 format.
3216          */
3217         StaticBuf.buf = (char*) SegmentStart; /*< it will just be read there... */
3218         StaticBuf.BufUsed = SegmentEnd - SegmentStart;
3219         StaticBuf.BufSize = DecodeMe->BufSize - (SegmentStart - DecodeMe->buf);
3220         extract_token(charset, SegmentStart, 1, '?', sizeof charset);
3221         if (FoundCharset != NULL) {
3222                 FlushStrBuf(FoundCharset);
3223                 StrBufAppendBufPlain(FoundCharset, charset, -1, 0);
3224         }
3225         extract_token(encoding, SegmentStart, 2, '?', sizeof encoding);
3226         StrBufExtract_token(ConvertBuf, &StaticBuf, 3, '?');
3227
3228         *encoding = toupper(*encoding);
3229         if (*encoding == 'B') { /**< base64 */
3230                 if (ConvertBuf2->BufSize < ConvertBuf->BufUsed)
3231                         IncreaseBuf(ConvertBuf2, 0, ConvertBuf->BufUsed);
3232                 ConvertBuf2->BufUsed = CtdlDecodeBase64(ConvertBuf2->buf,
3233                                                         ConvertBuf->buf,
3234                                                         ConvertBuf->BufUsed);
3235         }
3236         else if (*encoding == 'Q') {    /**< quoted-printable */
3237                 long pos;
3238
3239                 pos = 0;
3240                 while (pos < ConvertBuf->BufUsed)
3241                 {
3242                         if (ConvertBuf->buf[pos] == '_')
3243                                 ConvertBuf->buf[pos] = ' ';
3244                         pos++;
3245                 }
3246
3247                 if (ConvertBuf2->BufSize < ConvertBuf->BufUsed)
3248                         IncreaseBuf(ConvertBuf2, 0, ConvertBuf->BufUsed);
3249
3250                 ConvertBuf2->BufUsed = CtdlDecodeQuotedPrintable(
3251                         ConvertBuf2->buf,
3252                         ConvertBuf->buf,
3253                         ConvertBuf->BufUsed);
3254         }
3255         else {
3256                 StrBufAppendBuf(ConvertBuf2, ConvertBuf, 0);
3257         }
3258 #ifdef HAVE_ICONV
3259         ctdl_iconv_open("UTF-8", charset, &ic);
3260         if (ic != (iconv_t)(-1) ) {
3261 #endif
3262                 StrBufConvert(ConvertBuf2, ConvertBuf, &ic);
3263                 StrBufAppendBuf(Target, ConvertBuf2, 0);
3264 #ifdef HAVE_ICONV
3265                 iconv_close(ic);
3266         }
3267         else {
3268                 StrBufAppendBufPlain(Target, HKEY("(unreadable)"), 0);
3269         }
3270 #endif
3271 }
3272
3273 /**
3274  * @ingroup StrBuf_DeEnCoder
3275  * @brief Handle subjects with RFC2047 encoding such as: [deprecated old syntax!]
3276  * =?koi8-r?B?78bP0s3Mxc7JxSDXz9rE1dvO2c3JINvB0sHNySDP?=
3277  * @param Target where to put the decoded string to
3278  * @param DecodeMe buffer with encoded string
3279  * @param DefaultCharset if we don't find one, which should we use?
3280  * @param FoundCharset overrides DefaultCharset if non-empty; If we find a charset inside of the string,
3281  *        put it here for later use where no string might be known.
3282  */
3283 void StrBuf_RFC822_to_Utf8(StrBuf *Target, const StrBuf *DecodeMe, const StrBuf* DefaultCharset, StrBuf *FoundCharset)
3284 {
3285         StrBuf *ConvertBuf;
3286         StrBuf *ConvertBuf2;
3287         ConvertBuf = NewStrBufPlain(NULL, StrLength(DecodeMe));
3288         ConvertBuf2 = NewStrBufPlain(NULL, StrLength(DecodeMe));
3289
3290         StrBuf_RFC822_2_Utf8(Target,
3291                              DecodeMe,
3292                              DefaultCharset,
3293                              FoundCharset,
3294                              ConvertBuf,
3295                              ConvertBuf2);
3296         FreeStrBuf(&ConvertBuf);
3297         FreeStrBuf(&ConvertBuf2);
3298 }
3299
3300 /**
3301  * @ingroup StrBuf_DeEnCoder
3302  * @brief Handle subjects with RFC2047 encoding such as:
3303  * =?koi8-r?B?78bP0s3Mxc7JxSDXz9rE1dvO2c3JINvB0sHNySDP?=
3304  * @param Target where to put the decoded string to
3305  * @param DecodeMe buffer with encoded string
3306  * @param DefaultCharset if we don't find one, which should we use?
3307  * @param FoundCharset overrides DefaultCharset if non-empty; If we find a charset inside of the string,
3308  *        put it here for later use where no string might be known.
3309  * @param ConvertBuf workbuffer. feed in, you shouldn't care about its content.
3310  * @param ConvertBuf2 workbuffer. feed in, you shouldn't care about its content.
3311  */
3312 void StrBuf_RFC822_2_Utf8(StrBuf *Target,
3313                           const StrBuf *DecodeMe,
3314                           const StrBuf* DefaultCharset,
3315                           StrBuf *FoundCharset,
3316                           StrBuf *ConvertBuf,
3317                           StrBuf *ConvertBuf2)
3318 {
3319         StrBuf *DecodedInvalidBuf = NULL;
3320         const StrBuf *DecodeMee = DecodeMe;
3321         const char *start, *end, *next, *nextend, *ptr = NULL;
3322 #ifdef HAVE_ICONV
3323         iconv_t ic = (iconv_t)(-1) ;
3324 #endif
3325         const char *eptr;
3326         int passes = 0;
3327         int i;
3328         int illegal_non_rfc2047_encoding = 0;
3329
3330
3331         if (DecodeMe == NULL)
3332                 return;
3333         /* Sometimes, badly formed messages contain strings which were simply
3334          *  written out directly in some foreign character set instead of
3335          *  using RFC2047 encoding.  This is illegal but we will attempt to
3336          *  handle it anyway by converting from a user-specified default
3337          *  charset to UTF-8 if we see any nonprintable characters.
3338          */
3339
3340         for (i=0; i<DecodeMe->BufUsed; ++i) {
3341                 if ((DecodeMe->buf[i] < 32) || (DecodeMe->buf[i] > 126)) {
3342                         illegal_non_rfc2047_encoding = 1;
3343                         break;
3344                 }
3345         }
3346
3347         if ((illegal_non_rfc2047_encoding) &&
3348             (strcasecmp(ChrPtr(DefaultCharset), "UTF-8")) &&
3349             (strcasecmp(ChrPtr(DefaultCharset), "us-ascii")) )
3350         {
3351 #ifdef HAVE_ICONV
3352                 ctdl_iconv_open("UTF-8", ChrPtr(DefaultCharset), &ic);
3353                 if (ic != (iconv_t)(-1) ) {
3354                         DecodedInvalidBuf = NewStrBufDup(DecodeMe);
3355                         StrBufConvert(DecodedInvalidBuf, ConvertBuf, &ic);///TODO: don't void const?
3356                         DecodeMee = DecodedInvalidBuf;
3357                         iconv_close(ic);
3358                 }
3359 #endif
3360         }
3361
3362         /* pre evaluate the first pair */
3363         end = NULL;
3364         start = strstr(DecodeMee->buf, "=?");
3365         eptr = DecodeMee->buf + DecodeMee->BufUsed;
3366         if (start != NULL)
3367                 end = FindNextEnd (DecodeMee, start + 2);
3368         else {
3369                 StrBufAppendBuf(Target, DecodeMee, 0);
3370                 FreeStrBuf(&DecodedInvalidBuf);
3371                 return;
3372         }
3373
3374
3375         if (start != DecodeMee->buf) {
3376                 long nFront;
3377
3378                 nFront = start - DecodeMee->buf;
3379                 StrBufAppendBufPlain(Target, DecodeMee->buf, nFront, 0);
3380         }
3381         /*
3382          * Since spammers will go to all sorts of absurd lengths to get their
3383          * messages through, there are LOTS of corrupt headers out there.
3384          * So, prevent a really badly formed RFC2047 header from throwing
3385          * this function into an infinite loop.
3386          */
3387         while ((start != NULL) &&
3388                (end != NULL) &&
3389                (start < eptr) &&
3390                (end < eptr) &&
3391                (passes < 20))
3392         {
3393                 passes++;
3394                 DecodeSegment(Target,
3395                               DecodeMee,
3396                               start,
3397                               end,
3398                               ConvertBuf,
3399                               ConvertBuf2,
3400                               FoundCharset);
3401
3402                 next = strstr(end, "=?");
3403                 nextend = NULL;
3404                 if ((next != NULL) &&
3405                     (next < eptr))
3406                         nextend = FindNextEnd(DecodeMee, next);
3407                 if (nextend == NULL)
3408                         next = NULL;
3409
3410                 /* did we find two partitions */
3411                 if ((next != NULL) &&
3412                     ((next - end) > 2))
3413                 {
3414                         ptr = end + 2;
3415                         while ((ptr < next) &&
3416                                (isspace(*ptr) ||
3417                                 (*ptr == '\r') ||
3418                                 (*ptr == '\n') ||
3419                                 (*ptr == '\t')))
3420                                 ptr ++;
3421                         /*
3422                          * did we find a gab just filled with blanks?
3423                          * if not, copy its stuff over.
3424                          */
3425                         if (ptr != next)
3426                         {
3427                                 StrBufAppendBufPlain(Target,
3428                                                      end + 2,
3429                                                      next - end - 2,
3430                                                      0);
3431                         }
3432                 }
3433                 /* our next-pair is our new first pair now. */
3434                 ptr = end + 2;
3435                 start = next;
3436                 end = nextend;
3437         }
3438         end = ptr;
3439         nextend = DecodeMee->buf + DecodeMee->BufUsed;
3440         if ((end != NULL) && (end < nextend)) {
3441                 ptr = end;
3442                 while ( (ptr < nextend) &&
3443                         (isspace(*ptr) ||
3444                          (*ptr == '\r') ||
3445                          (*ptr == '\n') ||
3446                          (*ptr == '\t')))
3447                         ptr ++;
3448                 if (ptr < nextend)
3449                         StrBufAppendBufPlain(Target, end, nextend - end, 0);
3450         }
3451         FreeStrBuf(&DecodedInvalidBuf);
3452 }
3453
3454 /*******************************************************************************
3455  *                   Manipulating UTF-8 Strings                                *
3456  *******************************************************************************/
3457
3458 /**
3459  * @ingroup StrBuf
3460  * @brief evaluate the length of an utf8 special character sequence
3461  * @param Char the character to examine
3462  * @returns width of utf8 chars in bytes; if the sequence is broken 0 is returned; 1 if its simply ASCII.
3463  */
3464 static inline int Ctdl_GetUtf8SequenceLength(const char *CharS, const char *CharE)
3465 {
3466         int n = 0;
3467         unsigned char test = (1<<7);
3468
3469         if ((*CharS & 0xC0) != 0xC0)
3470                 return 1;
3471
3472         while ((n < 8) &&
3473                ((test & ((unsigned char)*CharS)) != 0))
3474         {
3475                 test = test >> 1;
3476                 n ++;
3477         }
3478         if ((n > 6) || ((CharE - CharS) < n))
3479                 n = 0;
3480         return n;
3481 }
3482
3483 /**
3484  * @ingroup StrBuf
3485  * @brief detect whether this char starts an utf-8 encoded char
3486  * @param Char character to inspect
3487  * @returns yes or no
3488  */
3489 static inline int Ctdl_IsUtf8SequenceStart(const char Char)
3490 {
3491 /** 11??.???? indicates an UTF8 Sequence. */
3492         return ((Char & 0xC0) == 0xC0);
3493 }
3494
3495 /**
3496  * @ingroup StrBuf
3497  * @brief measure the number of glyphs in an UTF8 string...
3498  * @param Buf string to measure
3499  * @returns the number of glyphs in Buf
3500  */
3501 long StrBuf_Utf8StrLen(StrBuf *Buf)
3502 {
3503         int n = 0;
3504         int m = 0;
3505         char *aptr, *eptr;
3506
3507         if ((Buf == NULL) || (Buf->BufUsed == 0))
3508                 return 0;
3509         aptr = Buf->buf;
3510         eptr = Buf->buf + Buf->BufUsed;
3511         while ((aptr < eptr) && (*aptr != '\0')) {
3512                 if (Ctdl_IsUtf8SequenceStart(*aptr)){
3513                         m = Ctdl_GetUtf8SequenceLength(aptr, eptr);
3514                         while ((aptr < eptr) && (*aptr++ != '\0')&& (m-- > 0) );
3515                         n ++;
3516                 }
3517                 else {
3518                         n++;
3519                         aptr++;
3520                 }
3521         }
3522         return n;
3523 }
3524
3525 /**
3526  * @ingroup StrBuf
3527  * @brief cuts a string after maxlen glyphs
3528  * @param Buf string to cut to maxlen glyphs
3529  * @param maxlen how long may the string become?
3530  * @returns current length of the string
3531  */
3532 long StrBuf_Utf8StrCut(StrBuf *Buf, int maxlen)
3533 {
3534         char *aptr, *eptr;
3535         int n = 0, m = 0;
3536
3537         aptr = Buf->buf;
3538         eptr = Buf->buf + Buf->BufUsed;
3539         while ((aptr < eptr) && (*aptr != '\0')) {
3540                 if (Ctdl_IsUtf8SequenceStart(*aptr)){
3541                         m = Ctdl_GetUtf8SequenceLength(aptr, eptr);
3542                         while ((*aptr++ != '\0') && (m-- > 0));
3543                         n ++;
3544                 }
3545                 else {
3546                         n++;
3547                         aptr++;
3548                 }
3549                 if (n > maxlen) {
3550                         *aptr = '\0';
3551                         Buf->BufUsed = aptr - Buf->buf;
3552                         return Buf->BufUsed;
3553                 }
3554         }
3555         return Buf->BufUsed;
3556
3557 }
3558
3559
3560
3561
3562
3563 /*******************************************************************************
3564  *                               wrapping ZLib                                 *
3565  *******************************************************************************/
3566
3567 #ifdef HAVE_ZLIB
3568 #define DEF_MEM_LEVEL 8 /*< memlevel??? */
3569 #define OS_CODE 0x03    /*< unix */
3570
3571 /**
3572  * @ingroup StrBuf_DeEnCoder
3573  * @brief uses the same calling syntax as compress2(), but it
3574  *   creates a stream compatible with HTTP "Content-encoding: gzip"
3575  * @param dest compressed buffer
3576  * @param destLen length of the compresed data
3577  * @param source source to encode
3578  * @param sourceLen length of source to encode
3579  * @param level compression level
3580  */
3581 int ZEXPORT compress_gzip(Bytef * dest,
3582                           size_t * destLen,
3583                           const Bytef * source,
3584                           uLong sourceLen,
3585                           int level)
3586 {
3587         const int gz_magic[2] = { 0x1f, 0x8b }; /* gzip magic header */
3588
3589         /* write gzip header */
3590         snprintf((char *) dest, *destLen,
3591                  "%c%c%c%c%c%c%c%c%c%c",
3592                  gz_magic[0], gz_magic[1], Z_DEFLATED,
3593                  0 /*flags */ , 0, 0, 0, 0 /*time */ , 0 /* xflags */ ,
3594                  OS_CODE);
3595
3596         /* normal deflate */
3597         z_stream stream;
3598         int err;
3599         stream.next_in = (Bytef *) source;
3600         stream.avail_in = (uInt) sourceLen;
3601         stream.next_out = dest + 10L;   // after header
3602         stream.avail_out = (uInt) * destLen;
3603         if ((uLong) stream.avail_out != *destLen)
3604                 return Z_BUF_ERROR;
3605
3606         stream.zalloc = (alloc_func) 0;
3607         stream.zfree = (free_func) 0;
3608         stream.opaque = (voidpf) 0;
3609
3610         err = deflateInit2(&stream, level, Z_DEFLATED, -MAX_WBITS,
3611                            DEF_MEM_LEVEL, Z_DEFAULT_STRATEGY);
3612         if (err != Z_OK)
3613                 return err;
3614
3615         err = deflate(&stream, Z_FINISH);
3616         if (err != Z_STREAM_END) {
3617                 deflateEnd(&stream);
3618                 return err == Z_OK ? Z_BUF_ERROR : err;
3619         }
3620         *destLen = stream.total_out + 10L;
3621
3622         /* write CRC and Length */
3623         uLong crc = crc32(0L, source, sourceLen);
3624         int n;
3625         for (n = 0; n < 4; ++n, ++*destLen) {
3626                 dest[*destLen] = (int) (crc & 0xff);
3627                 crc >>= 8;
3628         }
3629         uLong len = stream.total_in;
3630         for (n = 0; n < 4; ++n, ++*destLen) {
3631                 dest[*destLen] = (int) (len & 0xff);
3632                 len >>= 8;
3633         }
3634         err = deflateEnd(&stream);
3635         return err;
3636 }
3637 #endif
3638
3639
3640 /**
3641  * @ingroup StrBuf_DeEnCoder
3642  * @brief compress the buffer with gzip
3643  * Attention! If you feed this a Const String, you must maintain the uncompressed buffer yourself!
3644  * @param Buf buffer whose content is to be gzipped
3645  */
3646 int CompressBuffer(StrBuf *Buf)
3647 {
3648 #ifdef HAVE_ZLIB
3649         char *compressed_data = NULL;
3650         size_t compressed_len, bufsize;
3651         int i = 0;
3652
3653         bufsize = compressed_len = Buf->BufUsed +  (Buf->BufUsed / 100) + 100;
3654         compressed_data = malloc(compressed_len);
3655
3656         if (compressed_data == NULL)
3657                 return -1;
3658         /* Flush some space after the used payload so valgrind shuts up... */
3659         while ((i < 10) && (Buf->BufUsed + i < Buf->BufSize))
3660                 Buf->buf[Buf->BufUsed + i++] = '\0';
3661         if (compress_gzip((Bytef *) compressed_data,
3662                           &compressed_len,
3663                           (Bytef *) Buf->buf,
3664                           (uLongf) Buf->BufUsed, Z_BEST_SPEED) == Z_OK) {
3665                 if (!Buf->ConstBuf)
3666                         free(Buf->buf);
3667                 Buf->buf = compressed_data;
3668                 Buf->BufUsed = compressed_len;
3669                 Buf->BufSize = bufsize;
3670                 /* Flush some space after the used payload so valgrind shuts up... */
3671                 i = 0;
3672                 while ((i < 10) && (Buf->BufUsed + i < Buf->BufSize))
3673                         Buf->buf[Buf->BufUsed + i++] = '\0';
3674                 return 1;
3675         } else {
3676                 free(compressed_data);
3677         }
3678 #endif  /* HAVE_ZLIB */
3679         return 0;
3680 }
3681
3682 /*******************************************************************************
3683  *           File I/O; Callbacks to libevent                                   *
3684  *******************************************************************************/
3685
3686 long StrBuf_read_one_chunk_callback (int fd, short event, IOBuffer *FB)
3687 {
3688         long bufremain = 0;
3689         int n;
3690
3691         if ((FB == NULL) || (FB->Buf == NULL))
3692                 return -1;
3693
3694         /*
3695          * check whether the read pointer is somewhere in a range
3696          * where a cut left is inexpensive
3697          */
3698
3699         if (FB->ReadWritePointer != NULL)
3700         {
3701                 long already_read;
3702
3703                 already_read = FB->ReadWritePointer - FB->Buf->buf;
3704                 bufremain = FB->Buf->BufSize - FB->Buf->BufUsed - 1;
3705
3706                 if (already_read != 0) {
3707                         long unread;
3708
3709                         unread = FB->Buf->BufUsed - already_read;
3710
3711                         /* else nothing to compact... */
3712                         if (unread == 0) {
3713                                 FB->ReadWritePointer = FB->Buf->buf;
3714                                 bufremain = FB->Buf->BufSize;
3715                         }
3716                         else if ((unread < 64) ||
3717                                  (bufremain < already_read))
3718                         {
3719                                 /*
3720                                  * if its just a tiny bit remaining, or we run out of space...
3721                                  * lets tidy up.
3722                                  */
3723                                 FB->Buf->BufUsed = unread;
3724                                 if (unread < already_read)
3725                                         memcpy(FB->Buf->buf, FB->ReadWritePointer, unread);
3726                                 else
3727                                         memmove(FB->Buf->buf, FB->ReadWritePointer, unread);
3728                                 FB->ReadWritePointer = FB->Buf->buf;
3729                                 bufremain = FB->Buf->BufSize - unread - 1;
3730                         }
3731                         else if (bufremain < (FB->Buf->BufSize / 10))
3732                         {
3733                                 /* get a bigger buffer */
3734
3735                                 IncreaseBuf(FB->Buf, 0, FB->Buf->BufUsed + 1);
3736
3737                                 FB->ReadWritePointer = FB->Buf->buf + unread;
3738
3739                                 bufremain = FB->Buf->BufSize - unread - 1;
3740 /*TODO: special increase function that won't copy the already read! */
3741                         }
3742                 }
3743                 else if (bufremain < 10) {
3744                         IncreaseBuf(FB->Buf, 1, FB->Buf->BufUsed + 10);
3745
3746                         FB->ReadWritePointer = FB->Buf->buf;
3747
3748                         bufremain = FB->Buf->BufSize - FB->Buf->BufUsed - 1;
3749                 }
3750
3751         }
3752         else {
3753                 FB->ReadWritePointer = FB->Buf->buf;
3754                 bufremain = FB->Buf->BufSize - 1;
3755         }
3756
3757         n = read(fd, FB->Buf->buf + FB->Buf->BufUsed, bufremain);
3758
3759         if (n > 0) {
3760                 FB->Buf->BufUsed += n;
3761                 FB->Buf->buf[FB->Buf->BufUsed] = '\0';
3762         }
3763         return n;
3764 }
3765
3766 int StrBuf_write_one_chunk_callback(int fd, short event, IOBuffer *FB)
3767 {
3768         long WriteRemain;
3769         int n;
3770
3771         if ((FB == NULL) || (FB->Buf == NULL))
3772                 return -1;
3773
3774         if (FB->ReadWritePointer != NULL)
3775         {
3776                 WriteRemain = FB->Buf->BufUsed -
3777                         (FB->ReadWritePointer -
3778                          FB->Buf->buf);
3779         }
3780         else {
3781                 FB->ReadWritePointer = FB->Buf->buf;
3782                 WriteRemain = FB->Buf->BufUsed;
3783         }
3784
3785         n = write(fd, FB->ReadWritePointer, WriteRemain);
3786         if (n > 0) {
3787                 FB->ReadWritePointer += n;
3788
3789                 if (FB->ReadWritePointer ==
3790                     FB->Buf->buf + FB->Buf->BufUsed)
3791                 {
3792                         FlushStrBuf(FB->Buf);
3793                         FB->ReadWritePointer = NULL;
3794                         return 0;
3795                 }
3796         // check whether we've got something to write
3797         // get the maximum chunk plus the pointer we can send
3798         // write whats there
3799         // if not all was sent, remember the send pointer for the next time
3800                 return FB->ReadWritePointer - FB->Buf->buf + FB->Buf->BufUsed;
3801         }
3802         return n;
3803 }
3804
3805 /**
3806  * @ingroup StrBuf_IO
3807  * @brief extract a "next line" from Buf; Ptr to persist across several iterations
3808  * @param LineBuf your line will be copied here.
3809  * @param FB BLOB with lines of text...
3810  * @param Ptr moved arround to keep the next-line across several iterations
3811  *        has to be &NULL on start; will be &NotNULL on end of buffer
3812  * @returns size of copied buffer
3813  */
3814 eReadState StrBufChunkSipLine(StrBuf *LineBuf, IOBuffer *FB)
3815 {
3816         const char *aptr, *ptr, *eptr;
3817         char *optr, *xptr;
3818
3819         if ((FB == NULL) || (LineBuf == NULL) || (LineBuf->buf == NULL))
3820                 return eReadFail;
3821
3822
3823         if ((FB->Buf == NULL) || (FB->ReadWritePointer == StrBufNOTNULL)) {
3824                 FB->ReadWritePointer = StrBufNOTNULL;
3825                 return eReadFail;
3826         }
3827
3828         FlushStrBuf(LineBuf);
3829         if (FB->ReadWritePointer == NULL)
3830                 ptr = aptr = FB->Buf->buf;
3831         else
3832                 ptr = aptr = FB->ReadWritePointer;
3833
3834         optr = LineBuf->buf;
3835         eptr = FB->Buf->buf + FB->Buf->BufUsed;
3836         xptr = LineBuf->buf + LineBuf->BufSize - 1;
3837
3838         while ((ptr <= eptr) &&
3839                (*ptr != '\n') &&
3840                (*ptr != '\r') )
3841         {
3842                 *optr = *ptr;
3843                 optr++; ptr++;
3844                 if (optr == xptr) {
3845                         LineBuf->BufUsed = optr - LineBuf->buf;
3846                         IncreaseBuf(LineBuf,  1, LineBuf->BufUsed + 1);
3847                         optr = LineBuf->buf + LineBuf->BufUsed;
3848                         xptr = LineBuf->buf + LineBuf->BufSize - 1;
3849                 }
3850         }
3851
3852         if (ptr >= eptr) {
3853                 if (optr > LineBuf->buf)
3854                         optr --;
3855                 if ((*(ptr - 1) != '\r') && (*(ptr - 1) != '\n')) {
3856                         LineBuf->BufUsed = optr - LineBuf->buf;
3857                         *optr = '\0';
3858                         if ((FB->ReadWritePointer != NULL) &&
3859                             (FB->ReadWritePointer != FB->Buf->buf))
3860                         {
3861                                 /* Ok, the client application read all the data
3862                                    it was interested in so far. Since there is more to read,
3863                                    we now shrink the buffer, and move the rest over.
3864                                 */
3865                                 StrBufCutLeft(FB->Buf,
3866                                               FB->ReadWritePointer - FB->Buf->buf);
3867                                 FB->ReadWritePointer = FB->Buf->buf;
3868                         }
3869                         return eMustReadMore;
3870                 }
3871         }
3872         LineBuf->BufUsed = optr - LineBuf->buf;
3873         *optr = '\0';
3874         if ((ptr <= eptr) && (*ptr == '\r'))
3875                 ptr ++;
3876         if ((ptr <= eptr) && (*ptr == '\n'))
3877                 ptr ++;
3878
3879         if (ptr < eptr) {
3880                 FB->ReadWritePointer = ptr;
3881         }
3882         else {
3883                 FlushStrBuf(FB->Buf);
3884                 FB->ReadWritePointer = NULL;
3885         }
3886
3887         return eReadSuccess;
3888 }
3889
3890 /**
3891  * @ingroup StrBuf_CHUNKED_IO
3892  * @brief check whether the chunk-buffer has more data waiting or not.
3893  * @param FB Chunk-Buffer to inspect
3894  */
3895 eReadState StrBufCheckBuffer(IOBuffer *FB)
3896 {
3897         if (FB == NULL)
3898                 return eReadFail;
3899         if (FB->Buf->BufUsed == 0)
3900                 return eReadSuccess;
3901         if (FB->ReadWritePointer == NULL)
3902                 return eBufferNotEmpty;
3903         if (FB->Buf->buf + FB->Buf->BufUsed > FB->ReadWritePointer)
3904                 return eBufferNotEmpty;
3905         return eReadSuccess;
3906 }
3907
3908 long IOBufferStrLength(IOBuffer *FB)
3909 {
3910         if ((FB == NULL) || (FB->Buf == NULL))
3911                 return 0;
3912         if (FB->ReadWritePointer == NULL)
3913                 return StrLength(FB->Buf);
3914
3915         return StrLength(FB->Buf) - (FB->ReadWritePointer - FB->Buf->buf);
3916 }
3917
3918 void FDIOBufferInit(FDIOBuffer *FDB, IOBuffer *IO, int FD, long TotalSendSize)
3919 {
3920         memset(FDB, 0, sizeof(FDIOBuffer));
3921         FDB->ChunkSize =
3922                 FDB->TotalSendSize = TotalSendSize;
3923         FDB->IOB = IO;
3924 #ifdef LINUX_SPLICE
3925         if (EnableSplice)
3926                 pipe(FDB->SplicePipe);
3927         else
3928 #endif
3929                 FDB->ChunkBuffer = NewStrBufPlain(NULL, TotalSendSize + 1);
3930
3931         FDB->OtherFD = FD;
3932 }
3933
3934 void FDIOBufferDelete(FDIOBuffer *FDB)
3935 {
3936 #ifdef LINUX_SPLICE
3937         if (EnableSplice)
3938         {
3939                 close(FDB->SplicePipe[0]);
3940                 close(FDB->SplicePipe[1]);
3941         }
3942         else
3943 #endif
3944                 FreeStrBuf(&FDB->ChunkBuffer);
3945
3946         close(FDB->OtherFD);
3947         memset(FDB, 0, sizeof(FDIOBuffer));
3948 }
3949
3950 int FileSendChunked(FDIOBuffer *FDB, const char **Err)
3951 {
3952         ssize_t sent, pipesize;
3953 #ifdef LINUX_SPLICE
3954         if (EnableSplice)
3955         {
3956                 if (FDB->PipeSize == 0)
3957                 {
3958                         pipesize = splice(FDB->OtherFD,
3959                                           &FDB->TotalSentAlready,
3960                                           FDB->SplicePipe[1],
3961                                           NULL,
3962                                           FDB->ChunkSendRemain,
3963                                           SPLICE_F_MOVE);
3964
3965                         if (pipesize == -1)
3966                         {
3967                                 *Err = strerror(errno);
3968                                 return pipesize;
3969                         }
3970                         FDB->PipeSize = pipesize;
3971                 }
3972                 sent =  splice(FDB->SplicePipe[0],
3973                                NULL,
3974                                FDB->IOB->fd,
3975                                NULL,
3976                                FDB->PipeSize,
3977                                SPLICE_F_MORE | SPLICE_F_MOVE | SPLICE_F_NONBLOCK);
3978                 if (sent == -1)
3979                 {
3980                         *Err = strerror(errno);
3981                         return sent;
3982                 }
3983                 FDB->PipeSize -= sent;
3984                 FDB->ChunkSendRemain -= sent;
3985                 return sent;
3986         }
3987         else
3988 #endif
3989         {
3990                 char *pRead;
3991                 long nRead = 0;
3992
3993                 pRead = FDB->ChunkBuffer->buf;
3994                 while ((FDB->ChunkBuffer->BufUsed < FDB->TotalSendSize) && (nRead >= 0))
3995                 {
3996                         nRead = read(FDB->OtherFD, pRead, FDB->TotalSendSize - FDB->ChunkBuffer->BufUsed);
3997                         if (nRead > 0) {
3998                                 FDB->ChunkBuffer->BufUsed += nRead;
3999                                 FDB->ChunkBuffer->buf[FDB->ChunkBuffer->BufUsed] = '\0';
4000                         }
4001                         else if (nRead == 0) {}
4002                         else return nRead;
4003
4004                 }
4005
4006                 nRead = write(FDB->IOB->fd, FDB->ChunkBuffer->buf + FDB->TotalSentAlready, FDB->ChunkSendRemain);
4007
4008                 if (nRead >= 0) {
4009                         FDB->TotalSentAlready += nRead;
4010                         FDB->ChunkSendRemain -= nRead;
4011                         return FDB->ChunkSendRemain;
4012                 }
4013                 else {
4014                         return nRead;
4015                 }
4016         }
4017 }
4018
4019 int FileRecvChunked(FDIOBuffer *FDB, const char **Err)
4020 {
4021         ssize_t sent, pipesize;
4022
4023 #ifdef LINUX_SPLICE
4024         if (EnableSplice)
4025         {
4026                 if (FDB->PipeSize == 0)
4027                 {
4028                         pipesize = splice(FDB->IOB->fd,
4029                                           NULL,
4030                                           FDB->SplicePipe[1],
4031                                           NULL,
4032                                           FDB->ChunkSendRemain,
4033                                           SPLICE_F_MORE | SPLICE_F_MOVE|SPLICE_F_NONBLOCK);
4034
4035                         if (pipesize == -1)
4036                         {
4037                                 *Err = strerror(errno);
4038                                 return pipesize;
4039                         }
4040                         FDB->PipeSize = pipesize;
4041                 }
4042
4043                 sent = splice(FDB->SplicePipe[0],
4044                               NULL,
4045                               FDB->OtherFD,
4046                               &FDB->TotalSentAlready,
4047                               FDB->PipeSize,
4048                               SPLICE_F_MORE | SPLICE_F_MOVE);
4049
4050                 if (sent == -1)
4051                 {
4052                         *Err = strerror(errno);
4053                         return sent;
4054                 }
4055                 FDB->PipeSize -= sent;
4056                 FDB->ChunkSendRemain -= sent;
4057                 return sent;
4058         }
4059         else
4060 #endif
4061         {
4062                 sent = read(FDB->IOB->fd, FDB->ChunkBuffer->buf, FDB->ChunkSendRemain);
4063                 if (sent > 0) {
4064                         int nWritten = 0;
4065                         int rc;
4066
4067                         FDB->ChunkBuffer->BufUsed = sent;
4068
4069                         while (nWritten < FDB->ChunkBuffer->BufUsed) {
4070                                 rc =  write(FDB->OtherFD, FDB->ChunkBuffer->buf + nWritten, FDB->ChunkBuffer->BufUsed - nWritten);
4071                                 if (rc < 0) {
4072                                         *Err = strerror(errno);
4073                                         return rc;
4074                                 }
4075                                 nWritten += rc;
4076
4077                         }
4078                         FDB->ChunkBuffer->BufUsed = 0;
4079                         FDB->TotalSentAlready += sent;
4080                         FDB->ChunkSendRemain -= sent;
4081                         return FDB->ChunkSendRemain;
4082                 }
4083                 else if (sent < 0) {
4084                         *Err = strerror(errno);
4085                         return sent;
4086                 }
4087                 return 0;
4088         }
4089 }
4090
4091 int FileMoveChunked(FDIOBuffer *FDB, const char **Err)
4092 {
4093         ssize_t sent, pipesize;
4094
4095 #ifdef LINUX_SPLICE
4096         if (EnableSplice)
4097         {
4098                 if (FDB->PipeSize == 0)
4099                 {
4100                         pipesize = splice(FDB->IOB->fd,
4101                                           &FDB->TotalReadAlready,
4102                                           FDB->SplicePipe[1],
4103                                           NULL,
4104                                           FDB->ChunkSendRemain,
4105                                           SPLICE_F_MORE | SPLICE_F_MOVE|SPLICE_F_NONBLOCK);
4106
4107                         if (pipesize == -1)
4108                         {
4109                                 *Err = strerror(errno);
4110                                 return pipesize;
4111                         }
4112                         FDB->PipeSize = pipesize;
4113                 }
4114
4115                 sent = splice(FDB->SplicePipe[0],
4116                               NULL,
4117                               FDB->OtherFD,
4118                               &FDB->TotalSentAlready,
4119                               FDB->PipeSize,
4120                               SPLICE_F_MORE | SPLICE_F_MOVE);
4121
4122                 if (sent == -1)
4123                 {
4124                         *Err = strerror(errno);
4125                         return sent;
4126                 }
4127                 FDB->PipeSize -= sent;
4128                 FDB->ChunkSendRemain -= sent;
4129                 return sent;
4130         }
4131         else
4132 #endif
4133         {
4134                 sent = read(FDB->IOB->fd, FDB->ChunkBuffer->buf, FDB->ChunkSendRemain);
4135                 if (sent > 0) {
4136                         int nWritten = 0;
4137                         int rc;
4138
4139                         FDB->ChunkBuffer->BufUsed = sent;
4140
4141                         while (nWritten < FDB->ChunkBuffer->BufUsed) {
4142                                 rc =  write(FDB->OtherFD, FDB->ChunkBuffer->buf + nWritten, FDB->ChunkBuffer->BufUsed - nWritten);
4143                                 if (rc < 0) {
4144                                         *Err = strerror(errno);
4145                                         return rc;
4146                                 }
4147                                 nWritten += rc;
4148
4149                         }
4150                         FDB->ChunkBuffer->BufUsed = 0;
4151                         FDB->TotalSentAlready += sent;
4152                         FDB->ChunkSendRemain -= sent;
4153                         return FDB->ChunkSendRemain;
4154                 }
4155                 else if (sent < 0) {
4156                         *Err = strerror(errno);
4157                         return sent;
4158                 }
4159                 return 0;
4160         }
4161 }
4162
4163 eReadState WriteIOBAlreadyRead(FDIOBuffer *FDB, const char **Error)
4164 {
4165         int IsNonBlock;
4166         int fdflags;
4167         long rlen;
4168         long should_write;
4169         int nSuccessLess = 0;
4170         struct timeval tv;
4171         fd_set rfds;
4172
4173         fdflags = fcntl(FDB->OtherFD, F_GETFL);
4174         IsNonBlock = (fdflags & O_NONBLOCK) == O_NONBLOCK;
4175
4176         while ((FDB->IOB->ReadWritePointer - FDB->IOB->Buf->buf < FDB->IOB->Buf->BufUsed) &&
4177                (FDB->ChunkSendRemain > 0))
4178         {
4179                 if (IsNonBlock){
4180                         tv.tv_sec = 1; /* selectresolution; */
4181                         tv.tv_usec = 0;
4182
4183                         FD_ZERO(&rfds);
4184                         FD_SET(FDB->OtherFD, &rfds);
4185                         if (select(FDB->OtherFD + 1, NULL, &rfds, NULL, &tv) == -1) {
4186                                 *Error = strerror(errno);
4187                                 return eReadFail;
4188                         }
4189                 }
4190                 if (IsNonBlock && !  FD_ISSET(FDB->OtherFD, &rfds)) {
4191                         nSuccessLess ++;
4192                         continue;
4193                 }
4194
4195                 should_write = FDB->IOB->Buf->BufUsed -
4196                         (FDB->IOB->ReadWritePointer - FDB->IOB->Buf->buf);
4197                 if (should_write > FDB->ChunkSendRemain)
4198                         should_write = FDB->ChunkSendRemain;
4199
4200                 rlen = write(FDB->OtherFD,
4201                              FDB->IOB->ReadWritePointer,
4202                              should_write);
4203                 if (rlen < 1) {
4204                         *Error = strerror(errno);
4205
4206                         return eReadFail;
4207                 }
4208                 FDB->TotalSentAlready += rlen;
4209                 FDB->IOB->ReadWritePointer += rlen;
4210                 FDB->ChunkSendRemain -= rlen;
4211         }
4212         if (FDB->IOB->ReadWritePointer >= FDB->IOB->Buf->buf + FDB->IOB->Buf->BufUsed)
4213         {
4214                 FlushStrBuf(FDB->IOB->Buf);
4215                 FDB->IOB->ReadWritePointer = NULL;
4216         }
4217
4218         if (FDB->ChunkSendRemain == 0)
4219                 return eReadSuccess;
4220         else
4221                 return eMustReadMore;
4222 }
4223
4224 /*******************************************************************************
4225  *           File I/O; Prefer buffered read since its faster!                  *
4226  *******************************************************************************/
4227
4228 /**
4229  * @ingroup StrBuf_IO
4230  * @brief Read a line from socket
4231  * flushes and closes the FD on error
4232  * @param buf the buffer to get the input to
4233  * @param fd pointer to the filedescriptor to read
4234  * @param append Append to an existing string or replace?
4235  * @param Error strerror() on error
4236  * @returns numbers of chars read
4237  */
4238 int StrBufTCP_read_line(StrBuf *buf, int *fd, int append, const char **Error)
4239 {
4240         int len, rlen, slen;
4241
4242         if ((buf == NULL) || (buf->buf == NULL)) {
4243                 *Error = strerror(EINVAL);
4244                 return -1;
4245         }
4246
4247         if (!append)
4248                 FlushStrBuf(buf);
4249
4250         slen = len = buf->BufUsed;
4251         while (1) {
4252                 rlen = read(*fd, &buf->buf[len], 1);
4253                 if (rlen < 1) {
4254                         *Error = strerror(errno);
4255
4256                         close(*fd);
4257                         *fd = -1;
4258
4259                         return -1;
4260                 }
4261                 if (buf->buf[len] == '\n')
4262                         break;
4263                 if (buf->buf[len] != '\r')
4264                         len ++;
4265                 if (len + 2 >= buf->BufSize) {
4266                         buf->BufUsed = len;
4267                         buf->buf[len+1] = '\0';
4268                         IncreaseBuf(buf, 1, -1);
4269                 }
4270         }
4271         buf->BufUsed = len;
4272         buf->buf[len] = '\0';
4273         return len - slen;
4274 }
4275
4276 /**
4277  * @ingroup StrBuf_BufferedIO
4278  * @brief Read a line from socket
4279  * flushes and closes the FD on error
4280  * @param Line the line to read from the fd / I/O Buffer
4281  * @param buf the buffer to get the input to
4282  * @param fd pointer to the filedescriptor to read
4283  * @param timeout number of successless selects until we bail out
4284  * @param selectresolution how long to wait on each select
4285  * @param Error strerror() on error
4286  * @returns numbers of chars read
4287  */
4288 int StrBufTCP_read_buffered_line(StrBuf *Line,
4289                                  StrBuf *buf,
4290                                  int *fd,
4291                                  int timeout,
4292                                  int selectresolution,
4293                                  const char **Error)
4294 {
4295         int len, rlen;
4296         int nSuccessLess = 0;
4297         fd_set rfds;
4298         char *pch = NULL;
4299         int fdflags;
4300         int IsNonBlock;
4301         struct timeval tv;
4302
4303         if (buf->BufUsed > 0) {
4304                 pch = strchr(buf->buf, '\n');
4305                 if (pch != NULL) {
4306                         rlen = 0;
4307                         len = pch - buf->buf;
4308                         if (len > 0 && (*(pch - 1) == '\r') )
4309                                 rlen ++;
4310                         StrBufSub(Line, buf, 0, len - rlen);
4311                         StrBufCutLeft(buf, len + 1);
4312                         return len - rlen;
4313                 }
4314         }
4315
4316         if (buf->BufSize - buf->BufUsed < 10)
4317                 IncreaseBuf(buf, 1, -1);
4318
4319         fdflags = fcntl(*fd, F_GETFL);
4320         IsNonBlock = (fdflags & O_NONBLOCK) == O_NONBLOCK;
4321
4322         while ((nSuccessLess < timeout) && (pch == NULL)) {
4323                 if (IsNonBlock){
4324                         tv.tv_sec = selectresolution;
4325                         tv.tv_usec = 0;
4326
4327                         FD_ZERO(&rfds);
4328                         FD_SET(*fd, &rfds);
4329                         if (select(*fd + 1, NULL, &rfds, NULL, &tv) == -1) {
4330                                 *Error = strerror(errno);
4331                                 close (*fd);
4332                                 *fd = -1;
4333                                 return -1;
4334                         }
4335                 }
4336                 if (IsNonBlock && !  FD_ISSET(*fd, &rfds)) {
4337                         nSuccessLess ++;
4338                         continue;
4339                 }
4340                 rlen = read(*fd,
4341                             &buf->buf[buf->BufUsed],
4342                             buf->BufSize - buf->BufUsed - 1);
4343                 if (rlen < 1) {
4344                         *Error = strerror(errno);
4345                         close(*fd);
4346                         *fd = -1;
4347                         return -1;
4348                 }
4349                 else if (rlen > 0) {
4350                         nSuccessLess = 0;
4351                         buf->BufUsed += rlen;
4352                         buf->buf[buf->BufUsed] = '\0';
4353                         pch = strchr(buf->buf, '\n');
4354                         if ((pch == NULL) &&
4355                             (buf->BufUsed + 10 > buf->BufSize) &&
4356                             (IncreaseBuf(buf, 1, -1) == -1))
4357                                 return -1;
4358                         continue;
4359                 }
4360
4361         }
4362         if (pch != NULL) {
4363                 rlen = 0;
4364                 len = pch - buf->buf;
4365                 if (len > 0 && (*(pch - 1) == '\r') )
4366                         rlen ++;
4367                 StrBufSub(Line, buf, 0, len - rlen);
4368                 StrBufCutLeft(buf, len + 1);
4369                 return len - rlen;
4370         }
4371         return -1;
4372
4373 }
4374
4375 static const char *ErrRBLF_PreConditionFailed="StrBufTCP_read_buffered_line_fast: Wrong arguments or invalid Filedescriptor";
4376 static const char *ErrRBLF_SelectFailed="StrBufTCP_read_buffered_line_fast: Select failed without reason";
4377 static const char *ErrRBLF_NotEnoughSentFromServer="StrBufTCP_read_buffered_line_fast: No complete line was sent from peer";
4378 /**
4379  * @ingroup StrBuf_BufferedIO
4380  * @brief Read a line from socket
4381  * flushes and closes the FD on error
4382  * @param Line where to append our Line read from the fd / I/O Buffer;
4383  * @param IOBuf the buffer to get the input to; lifetime pair to FD
4384  * @param Pos pointer to the current read position, should be NULL initialized on opening the FD it belongs to.!
4385  * @param fd pointer to the filedescriptor to read
4386  * @param timeout number of successless selects until we bail out
4387  * @param selectresolution how long to wait on each select
4388  * @param Error strerror() on error
4389  * @returns numbers of chars read or -1 in case of error. "\n" will become 0
4390  */
4391 int StrBufTCP_read_buffered_line_fast(StrBuf *Line,
4392                                       StrBuf *IOBuf,
4393                                       const char **Pos,
4394                                       int *fd,
4395                                       int timeout,
4396                                       int selectresolution,
4397                                       const char **Error)
4398 {
4399         const char *pche = NULL;
4400         const char *pos = NULL;
4401         const char *pLF;
4402         int len, rlen, retlen;
4403         int nSuccessLess = 0;
4404         fd_set rfds;
4405         const char *pch = NULL;
4406         int fdflags;
4407         int IsNonBlock;
4408         struct timeval tv;
4409
4410         retlen = 0;
4411         if ((Line == NULL) ||
4412             (Pos == NULL) ||
4413             (IOBuf == NULL) ||
4414             (*fd == -1))
4415         {
4416                 if (Pos != NULL)
4417                         *Pos = NULL;
4418                 *Error = ErrRBLF_PreConditionFailed;
4419                 return -1;
4420         }
4421
4422         pos = *Pos;
4423         if ((IOBuf->BufUsed > 0) &&
4424             (pos != NULL) &&
4425             (pos < IOBuf->buf + IOBuf->BufUsed))
4426         {
4427                 char *pcht;
4428
4429                 pche = IOBuf->buf + IOBuf->BufUsed;
4430                 pch = pos;
4431                 pcht = Line->buf;
4432
4433                 while ((pch < pche) && (*pch != '\n'))
4434                 {
4435                         if (Line->BufUsed + 10 > Line->BufSize)
4436                         {
4437                                 long apos;
4438                                 apos = pcht - Line->buf;
4439                                 *pcht = '\0';
4440                                 IncreaseBuf(Line, 1, -1);
4441                                 pcht = Line->buf + apos;
4442                         }
4443                         *pcht++ = *pch++;
4444                         Line->BufUsed++;
4445                         retlen++;
4446                 }
4447
4448                 len = pch - pos;
4449                 if (len > 0 && (*(pch - 1) == '\r') )
4450                 {
4451                         retlen--;
4452                         len --;
4453                         pcht --;
4454                         Line->BufUsed --;
4455                 }
4456                 *pcht = '\0';
4457
4458                 if ((pch >= pche) || (*pch == '\0'))
4459                 {
4460                         FlushStrBuf(IOBuf);
4461                         *Pos = NULL;
4462                         pch = NULL;
4463                         pos = 0;
4464                 }
4465
4466                 if ((pch != NULL) &&
4467                     (pch <= pche))
4468                 {
4469                         if (pch + 1 >= pche) {
4470                                 *Pos = NULL;
4471                                 FlushStrBuf(IOBuf);
4472                         }
4473                         else
4474                                 *Pos = pch + 1;
4475
4476                         return retlen;
4477                 }
4478                 else
4479                         FlushStrBuf(IOBuf);
4480         }
4481
4482         /* If we come here, Pos is Unset since we read everything into Line, and now go for more. */
4483
4484         if (IOBuf->BufSize - IOBuf->BufUsed < 10)
4485                 IncreaseBuf(IOBuf, 1, -1);
4486
4487         fdflags = fcntl(*fd, F_GETFL);
4488         IsNonBlock = (fdflags & O_NONBLOCK) == O_NONBLOCK;
4489
4490         pLF = NULL;
4491         while ((nSuccessLess < timeout) &&
4492                (pLF == NULL) &&
4493                (*fd != -1)) {
4494                 if (IsNonBlock)
4495                 {
4496                         tv.tv_sec = 1;
4497                         tv.tv_usec = 0;
4498
4499                         FD_ZERO(&rfds);
4500                         FD_SET(*fd, &rfds);
4501                         if (select((*fd) + 1, &rfds, NULL, NULL, &tv) == -1) {
4502                                 *Error = strerror(errno);
4503                                 close (*fd);
4504                                 *fd = -1;
4505                                 if (*Error == NULL)
4506                                         *Error = ErrRBLF_SelectFailed;
4507                                 return -1;
4508                         }
4509                         if (! FD_ISSET(*fd, &rfds) != 0) {
4510                                 nSuccessLess ++;
4511                                 continue;
4512                         }
4513                 }
4514                 rlen = read(*fd,
4515                             &IOBuf->buf[IOBuf->BufUsed],
4516                             IOBuf->BufSize - IOBuf->BufUsed - 1);
4517                 if (rlen < 1) {
4518                         *Error = strerror(errno);
4519                         close(*fd);
4520                         *fd = -1;
4521                         return -1;
4522                 }
4523                 else if (rlen > 0) {
4524                         nSuccessLess = 0;
4525                         pLF = IOBuf->buf + IOBuf->BufUsed;
4526                         IOBuf->BufUsed += rlen;
4527                         IOBuf->buf[IOBuf->BufUsed] = '\0';
4528
4529                         pche = IOBuf->buf + IOBuf->BufUsed;
4530
4531                         while ((pLF < pche) && (*pLF != '\n'))
4532                                 pLF ++;
4533                         if ((pLF >= pche) || (*pLF == '\0'))
4534                                 pLF = NULL;
4535
4536                         if (IOBuf->BufUsed + 10 > IOBuf->BufSize)
4537                         {
4538                                 long apos = 0;
4539
4540                                 if (pLF != NULL) apos = pLF - IOBuf->buf;
4541                                 IncreaseBuf(IOBuf, 1, -1);
4542                                 if (pLF != NULL) pLF = IOBuf->buf + apos;
4543                         }
4544
4545                         continue;
4546                 }
4547         }
4548         *Pos = NULL;
4549         if (pLF != NULL) {
4550                 pos = IOBuf->buf;
4551                 len = pLF - pos;
4552                 if (len > 0 && (*(pLF - 1) == '\r') )
4553                         len --;
4554                 StrBufAppendBufPlain(Line, ChrPtr(IOBuf), len, 0);
4555                 if (pLF + 1 >= IOBuf->buf + IOBuf->BufUsed)
4556                 {
4557                         FlushStrBuf(IOBuf);
4558                 }
4559                 else
4560                         *Pos = pLF + 1;
4561                 return retlen + len;
4562         }
4563         *Error = ErrRBLF_NotEnoughSentFromServer;
4564         return -1;
4565
4566 }
4567
4568 static const char *ErrRBLF_BLOBPreConditionFailed="StrBufReadBLOB: Wrong arguments or invalid Filedescriptor";
4569 /**
4570  * @ingroup StrBuf_IO
4571  * @brief Input binary data from socket
4572  * flushes and closes the FD on error
4573  * @param Buf the buffer to get the input to
4574  * @param fd pointer to the filedescriptor to read
4575  * @param append Append to an existing string or replace?
4576  * @param nBytes the maximal number of bytes to read
4577  * @param Error strerror() on error
4578  * @returns numbers of chars read
4579  */
4580 int StrBufReadBLOB(StrBuf *Buf, int *fd, int append, long nBytes, const char **Error)
4581 {
4582         int fdflags;
4583         int rlen;
4584         int nSuccessLess;
4585         int nRead = 0;
4586         char *ptr;
4587         int IsNonBlock;
4588         struct timeval tv;
4589         fd_set rfds;
4590
4591         if ((Buf == NULL) || (Buf->buf == NULL) || (*fd == -1))
4592         {
4593                 *Error = ErrRBLF_BLOBPreConditionFailed;
4594                 return -1;
4595         }
4596         if (!append)
4597                 FlushStrBuf(Buf);
4598         if (Buf->BufUsed + nBytes >= Buf->BufSize)
4599                 IncreaseBuf(Buf, 1, Buf->BufUsed + nBytes);
4600
4601         ptr = Buf->buf + Buf->BufUsed;
4602
4603         fdflags = fcntl(*fd, F_GETFL);
4604         IsNonBlock = (fdflags & O_NONBLOCK) == O_NONBLOCK;
4605         nSuccessLess = 0;
4606         while ((nRead < nBytes) &&
4607                (*fd != -1))
4608         {
4609                 if (IsNonBlock)
4610                 {
4611                         tv.tv_sec = 1;
4612                         tv.tv_usec = 0;
4613
4614                         FD_ZERO(&rfds);
4615                         FD_SET(*fd, &rfds);
4616                         if (select(*fd + 1, &rfds, NULL, NULL, &tv) == -1) {
4617                                 *Error = strerror(errno);
4618                                 close (*fd);
4619                                 *fd = -1;
4620                                 if (*Error == NULL)
4621                                         *Error = ErrRBLF_SelectFailed;
4622                                 return -1;
4623                         }
4624                         if (! FD_ISSET(*fd, &rfds) != 0) {
4625                                 nSuccessLess ++;
4626                                 continue;
4627                         }
4628                 }
4629
4630                 if ((rlen = read(*fd,
4631                                  ptr,
4632                                  nBytes - nRead)) == -1) {
4633                         close(*fd);
4634                         *fd = -1;
4635                         *Error = strerror(errno);
4636                         return rlen;
4637                 }
4638                 nRead += rlen;
4639                 ptr += rlen;
4640                 Buf->BufUsed += rlen;
4641         }
4642         Buf->buf[Buf->BufUsed] = '\0';
4643         return nRead;
4644 }
4645
4646 const char *ErrRBB_BLOBFPreConditionFailed = "StrBufReadBLOBBuffered: to many selects; aborting.";
4647 const char *ErrRBB_too_many_selects        = "StrBufReadBLOBBuffered: to many selects; aborting.";
4648 /**
4649  * @ingroup StrBuf_BufferedIO
4650  * @brief Input binary data from socket
4651  * flushes and closes the FD on error
4652  * @param Blob put binary thing here
4653  * @param IOBuf the buffer to get the input to
4654  * @param Pos offset inside of IOBuf
4655  * @param fd pointer to the filedescriptor to read
4656  * @param append Append to an existing string or replace?
4657  * @param nBytes the maximal number of bytes to read
4658  * @param check whether we should search for '000\n' terminators in case of timeouts
4659  * @param Error strerror() on error
4660  * @returns numbers of chars read
4661  */
4662 int StrBufReadBLOBBuffered(StrBuf *Blob,
4663                            StrBuf *IOBuf,
4664                            const char **Pos,
4665                            int *fd,
4666                            int append,
4667                            long nBytes,
4668                            int check,
4669                            const char **Error)
4670 {
4671         const char *pos;
4672         int fdflags;
4673         int rlen = 0;
4674         int nRead = 0;
4675         int nAlreadyRead = 0;
4676         int IsNonBlock;
4677         char *ptr;
4678         fd_set rfds;
4679         struct timeval tv;
4680         int nSuccessLess = 0;
4681         int MaxTries;
4682
4683         if ((Blob == NULL)  ||
4684             (*fd == -1)     ||
4685             (IOBuf == NULL) ||
4686             (Pos == NULL))
4687         {
4688                 if (Pos != NULL)
4689                         *Pos = NULL;
4690                 *Error = ErrRBB_BLOBFPreConditionFailed;
4691                 return -1;
4692         }
4693
4694         if (!append)
4695                 FlushStrBuf(Blob);
4696         if (Blob->BufUsed + nBytes >= Blob->BufSize)
4697                 IncreaseBuf(Blob, append, Blob->BufUsed + nBytes);
4698
4699         pos = *Pos;
4700
4701         if (pos != NULL)
4702                 rlen = pos - IOBuf->buf;
4703         rlen = IOBuf->BufUsed - rlen;
4704
4705
4706         if ((IOBuf->BufUsed > 0) &&
4707             (pos != NULL) &&
4708             (pos < IOBuf->buf + IOBuf->BufUsed))
4709         {
4710                 if (rlen < nBytes) {
4711                         memcpy(Blob->buf + Blob->BufUsed, pos, rlen);
4712                         Blob->BufUsed += rlen;
4713                         Blob->buf[Blob->BufUsed] = '\0';
4714                         nAlreadyRead = nRead = rlen;
4715                         *Pos = NULL;
4716                 }
4717                 if (rlen >= nBytes) {
4718                         memcpy(Blob->buf + Blob->BufUsed, pos, nBytes);
4719                         Blob->BufUsed += nBytes;
4720                         Blob->buf[Blob->BufUsed] = '\0';
4721                         if (rlen == nBytes) {
4722                                 *Pos = NULL;
4723                                 FlushStrBuf(IOBuf);
4724                         }
4725                         else
4726                                 *Pos += nBytes;
4727                         return nBytes;
4728                 }
4729         }
4730
4731         FlushStrBuf(IOBuf);
4732         *Pos = NULL;
4733         if (IOBuf->BufSize < nBytes - nRead)
4734                 IncreaseBuf(IOBuf, 0, nBytes - nRead);
4735         ptr = IOBuf->buf;
4736
4737         fdflags = fcntl(*fd, F_GETFL);
4738         IsNonBlock = (fdflags & O_NONBLOCK) == O_NONBLOCK;
4739         if (IsNonBlock)
4740                 MaxTries =   1000;
4741         else
4742                 MaxTries = 100000;
4743
4744         nBytes -= nRead;
4745         nRead = 0;
4746         while ((nSuccessLess < MaxTries) &&
4747                (nRead < nBytes) &&
4748                (*fd != -1)) {
4749                 if (IsNonBlock)
4750                 {
4751                         tv.tv_sec = 1;
4752                         tv.tv_usec = 0;
4753
4754                         FD_ZERO(&rfds);
4755                         FD_SET(*fd, &rfds);
4756                         if (select(*fd + 1, &rfds, NULL, NULL, &tv) == -1) {
4757                                 *Error = strerror(errno);
4758                                 close (*fd);
4759                                 *fd = -1;
4760                                 if (*Error == NULL)
4761                                         *Error = ErrRBLF_SelectFailed;
4762                                 return -1;
4763                         }
4764                         if (! FD_ISSET(*fd, &rfds) != 0) {
4765                                 nSuccessLess ++;
4766                                 continue;
4767                         }
4768                 }
4769                 rlen = read(*fd,
4770                             ptr,
4771                             IOBuf->BufSize - (ptr - IOBuf->buf));
4772                 if (rlen == -1) {
4773                         close(*fd);
4774                         *fd = -1;
4775                         *Error = strerror(errno);
4776                         return rlen;
4777                 }
4778                 else if (rlen == 0){
4779                         if ((check == NNN_TERM) &&
4780                             (nRead > 5) &&
4781                             (strncmp(IOBuf->buf + IOBuf->BufUsed - 5, "\n000\n", 5) == 0))
4782                         {
4783                                 StrBufPlain(Blob, HKEY("\n000\n"));
4784                                 StrBufCutRight(Blob, 5);
4785                                 return Blob->BufUsed;
4786                         }
4787                         else if (!IsNonBlock)
4788                                 nSuccessLess ++;
4789                         else if (nSuccessLess > MaxTries) {
4790                                 FlushStrBuf(IOBuf);
4791                                 *Error = ErrRBB_too_many_selects;
4792                                 return -1;
4793                         }
4794                 }
4795                 else if (rlen > 0) {
4796                         nSuccessLess = 0;
4797                         nRead += rlen;
4798                         ptr += rlen;
4799                         IOBuf->BufUsed += rlen;
4800                 }
4801         }
4802         if (nSuccessLess >= MaxTries) {
4803                 FlushStrBuf(IOBuf);
4804                 *Error = ErrRBB_too_many_selects;
4805                 return -1;
4806         }
4807
4808         if (nRead > nBytes) {
4809                 *Pos = IOBuf->buf + nBytes;
4810         }
4811         Blob->buf[Blob->BufUsed] = '\0';
4812         StrBufAppendBufPlain(Blob, IOBuf->buf, nBytes, 0);
4813         if (*Pos == NULL) {
4814                 FlushStrBuf(IOBuf);
4815         }
4816         return nRead + nAlreadyRead;
4817 }
4818
4819 /**
4820  * @ingroup StrBuf_IO
4821  * @brief extract a "next line" from Buf; Ptr to persist across several iterations
4822  * @param LineBuf your line will be copied here.
4823  * @param Buf BLOB with lines of text...
4824  * @param Ptr moved arround to keep the next-line across several iterations
4825  *        has to be &NULL on start; will be &NotNULL on end of buffer
4826  * @returns size of remaining buffer
4827  */
4828 int StrBufSipLine(StrBuf *LineBuf, const StrBuf *Buf, const char **Ptr)
4829 {
4830         const char *aptr, *ptr, *eptr;
4831         char *optr, *xptr;
4832
4833         if ((Buf == NULL) ||
4834             (*Ptr == StrBufNOTNULL) ||
4835             (LineBuf == NULL)||
4836             (LineBuf->buf == NULL))
4837         {
4838                 *Ptr = StrBufNOTNULL;
4839                 return 0;
4840         }
4841
4842         FlushStrBuf(LineBuf);
4843         if (*Ptr==NULL)
4844                 ptr = aptr = Buf->buf;
4845         else
4846                 ptr = aptr = *Ptr;
4847
4848         optr = LineBuf->buf;
4849         eptr = Buf->buf + Buf->BufUsed;
4850         xptr = LineBuf->buf + LineBuf->BufSize - 1;
4851
4852         while ((ptr <= eptr) &&
4853                (*ptr != '\n') &&
4854                (*ptr != '\r') )
4855         {
4856                 *optr = *ptr;
4857                 optr++; ptr++;
4858                 if (optr == xptr) {
4859                         LineBuf->BufUsed = optr - LineBuf->buf;
4860                         IncreaseBuf(LineBuf,  1, LineBuf->BufUsed + 1);
4861                         optr = LineBuf->buf + LineBuf->BufUsed;
4862                         xptr = LineBuf->buf + LineBuf->BufSize - 1;
4863                 }
4864         }
4865
4866         if ((ptr >= eptr) && (optr > LineBuf->buf))
4867                 optr --;
4868         LineBuf->BufUsed = optr - LineBuf->buf;
4869         *optr = '\0';
4870         if ((ptr <= eptr) && (*ptr == '\r'))
4871                 ptr ++;
4872         if ((ptr <= eptr) && (*ptr == '\n'))
4873                 ptr ++;
4874
4875         if (ptr < eptr) {
4876                 *Ptr = ptr;
4877         }
4878         else {
4879                 *Ptr = StrBufNOTNULL;
4880         }
4881
4882         return Buf->BufUsed - (ptr - Buf->buf);
4883 }
4884
4885
4886 /**
4887  * @ingroup StrBuf_IO
4888  * @brief removes double slashes from pathnames
4889  * @param Dir directory string to filter
4890  * @param RemoveTrailingSlash allows / disallows trailing slashes
4891  */
4892 void StrBufStripSlashes(StrBuf *Dir, int RemoveTrailingSlash)
4893 {
4894         char *a, *b;
4895
4896         a = b = Dir->buf;
4897
4898         while (!IsEmptyStr(a)) {
4899                 if (*a == '/') {
4900                         while (*a == '/')
4901                                 a++;
4902                         *b = '/';
4903                         b++;
4904                 }
4905                 else {
4906                         *b = *a;
4907                         b++; a++;
4908                 }
4909         }
4910         if ((RemoveTrailingSlash) &&
4911             (b > Dir->buf) &&
4912             (*(b - 1) == '/')){
4913                 b--;
4914         }
4915         *b = '\0';
4916         Dir->BufUsed = b - Dir->buf;
4917 }
4918
4919