libcitadel/lib/stringbuf.c

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