libcitadel/lib/mime_parser.c

   1 /*
   2  * This is the MIME parser for Citadel.
   3  *
   4  * Copyright (c) 1998-2010 by the citadel.org development team.
   5  * This code is distributed under the GNU General Public License v3.
   6  *
   7  */
   8
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <signal.h>
  13 #include <sys/types.h>
  14 #include <ctype.h>
  15 #include <string.h>
  16 #include <sys/stat.h>
  17 #include <sys/types.h>
  18 #include <dirent.h>
  19 #include <errno.h>
  20
  21 #include "xdgmime/xdgmime.h"
  22 #include "libcitadel.h"
  23 #include "libcitadellocal.h"
  24
  25 void extract_key(char *target, char *source, long sourcelen, char *key, long keylen, char KeyEnd)
  26 {
  27         char *sptr, *ptr = NULL;
  28         int double_quotes = 0;
  29         long RealKeyLen = keylen;
  30
  31         sptr = source;
  32
  33         while (sptr != NULL)
  34         {
  35                 ptr = bmstrcasestr_len(sptr, sourcelen - (sptr - source),
  36                                        key, keylen);
  37                 if(ptr != NULL)
  38                 {
  39                         while (isspace(*(ptr + RealKeyLen)))
  40                                 RealKeyLen ++;
  41                         if (*(ptr + RealKeyLen) == KeyEnd)
  42                         {
  43                                 sptr = NULL;
  44                                 RealKeyLen ++;
  45                         }
  46                         else
  47                         {
  48                                 sptr = ptr + RealKeyLen + 1;
  49                         }
  50                 }
  51                 else
  52                         sptr = ptr;
  53         }
  54         if (ptr == NULL) {
  55                 *target = '\0';
  56                 return;
  57         }
  58         strcpy(target, (ptr + RealKeyLen));
  59
  60         for (ptr=target; (*ptr != 0); ptr++) {
  61
  62                 /* A semicolon means we've hit the end of the key, unless we're inside double quotes */
  63                 if ( (double_quotes != 1) && (*ptr == ';')) {
  64                         *ptr = 0;
  65                 }
  66
  67                 /* if we find double quotes, we've got a great set of string boundaries */
  68                 if (*ptr == '\"') {
  69                         ++double_quotes;
  70                         if (double_quotes == 1) {
  71                                 strcpy(ptr, ptr+1);
  72                         }
  73                         else {
  74                                 *ptr = 0;
  75                         }
  76                 }
  77         }
  78         *ptr = '\0';
  79 }
  80
  81
  82 /*
  83  * For non-multipart messages, we need to generate a quickie partnum of "1"
  84  * to return to callback functions.  Some callbacks demand it.
  85  */
  86 char *fixed_partnum(char *supplied_partnum) {
  87         if (supplied_partnum == NULL) return "1";
  88         if (strlen(supplied_partnum)==0) return "1";
  89         return supplied_partnum;
  90 }
  91
  92
  93 static inline unsigned int _decode_hex(char *Source)
  94 {
  95         int ret = 0;
  96         if      ((*Source >= '0') && (*Source <= '9')) {
  97                 ret += (*Source - '0');
  98         }
  99         else if ((*Source >= 'A') && (*Source <= 'F')) {
 100                 ret += (*Source - 'A' + 10);
 101         }
 102         else if ((*Source >= 'a') && (*Source <= 'f')) {
 103                 ret += (*Source - 'a' + 10);
 104         }
 105         else {
 106                 return '?';
 107         }
 108
 109         ret = ret << 4;
 110
 111         if      ((*(Source + 1) >= '0') && (*(Source + 1) <= '9')) {
 112                 ret |= (*(Source + 1) - '0');
 113         }
 114         else if ((*(Source + 1) >= 'A') && (*(Source + 1) <= 'F')) {
 115                 ret |= (*(Source + 1) - 'A' + 10);
 116         }
 117         else if ((*(Source + 1) >= 'a') && (*(Source + 1) <= 'f')) {
 118                 ret |= (*(Source + 1) - 'a' + 10);
 119         }
 120         else {
 121                 return '?';
 122         }
 123         return ret;
 124 }
 125
 126 unsigned int decode_hex(char *Source) {return _decode_hex(Source);}
 127
 128 /*
 129  * Convert "quoted-printable" to binary.  Returns number of bytes decoded.
 130  * according to RFC2045 section 6.7
 131  */
 132 int CtdlDecodeQuotedPrintable(char *decoded, char *encoded, int sourcelen) {
 133         unsigned int ch;
 134         int decoded_length = 0;
 135         int pos = 0;
 136
 137         while (pos < sourcelen)
 138         {
 139                 if (!strncmp(&encoded[pos], "=\r\n", 3))
 140                 {
 141                         pos += 3;
 142                 }
 143                 else if (!strncmp(&encoded[pos], "=\n", 2))
 144                 {
 145                         pos += 2;
 146                 }
 147                 else if (encoded[pos] == '=')
 148                 {
 149                         ch = 0;
 150                         ch = _decode_hex(&encoded[pos+1]);
 151                         pos += 3;
 152                         decoded[decoded_length++] = ch;
 153                 }
 154                 else
 155                 {
 156                         decoded[decoded_length++] = encoded[pos];
 157                         pos += 1;
 158                 }
 159         }
 160         decoded[decoded_length] = 0;
 161         return(decoded_length);
 162 }
 163
 164
 165 /*
 166  * Given a message or message-part body and a length, handle any necessary
 167  * decoding and pass the request up the stack.
 168  */
 169 void mime_decode(char *partnum,
 170                  char *part_start, size_t length,
 171                  char *content_type, char *charset, char *encoding,
 172                  char *disposition,
 173                  char *id,
 174                  char *name, char *filename,
 175                  MimeParserCallBackType CallBack,
 176                  MimeParserCallBackType PreMultiPartCallBack,
 177                  MimeParserCallBackType PostMultiPartCallBack,
 178                  void *userdata,
 179                  int dont_decode)
 180 {
 181
 182         char *decoded;
 183         size_t bytes_decoded = 0;
 184
 185         /* Some encodings aren't really encodings */
 186         if (!strcasecmp(encoding, "7bit"))
 187                 strcpy(encoding, "");
 188         if (!strcasecmp(encoding, "8bit"))
 189                 strcpy(encoding, "");
 190         if (!strcasecmp(encoding, "binary"))
 191                 strcpy(encoding, "");
 192
 193         /* If this part is not encoded, send as-is */
 194         if ( (strlen(encoding) == 0) || (dont_decode)) {
 195                 if (CallBack != NULL) {
 196                         CallBack(name, filename, fixed_partnum(partnum),
 197                                 disposition, part_start,
 198                                 content_type, charset, length, encoding, id, userdata);
 199                         }
 200                 return;
 201         }
 202
 203         /* Fail silently if we hit an unknown encoding. */
 204         if ((strcasecmp(encoding, "base64"))
 205             && (strcasecmp(encoding, "quoted-printable"))) {
 206                 return;
 207         }
 208
 209         /*
 210          * Allocate a buffer for the decoded data.  The output buffer is slightly
 211          * larger than the input buffer; this assumes that the decoded data
 212          * will never be significantly larger than the encoded data.  This is a
 213          * safe assumption with base64, uuencode, and quoted-printable.
 214          */
 215         decoded = malloc(length + 32768);
 216         if (decoded == NULL) {
 217                 return;
 218         }
 219
 220         if (!strcasecmp(encoding, "base64")) {
 221                 bytes_decoded = CtdlDecodeBase64(decoded, part_start, length);
 222         }
 223         else if (!strcasecmp(encoding, "quoted-printable")) {
 224                 bytes_decoded = CtdlDecodeQuotedPrintable(decoded, part_start, length);
 225         }
 226
 227         if (bytes_decoded > 0) if (CallBack != NULL) {
 228                 CallBack(name, filename, fixed_partnum(partnum),
 229                         disposition, decoded,
 230                         content_type, charset, bytes_decoded, "binary", id, userdata);
 231         }
 232
 233         free(decoded);
 234 }
 235
 236 /*
 237  * Break out the components of a multipart message
 238  * (This function expects to be fed HEADERS + CONTENT)
 239  * Note: NULL can be supplied as content_end; in this case, the message is
 240  * considered to have ended when the parser encounters a 0x00 byte.
 241  */
 242 void the_mime_parser(char *partnum,
 243                      char *content_start, char *content_end,
 244                      MimeParserCallBackType CallBack,
 245                      MimeParserCallBackType PreMultiPartCallBack,
 246                      MimeParserCallBackType PostMultiPartCallBack,
 247                      void *userdata,
 248                      int dont_decode)
 249 {
 250
 251         char *ptr;
 252         char *srch = NULL;
 253         char *part_start, *part_end = NULL;
 254         char buf[SIZ];
 255         char *header;
 256         char *boundary;
 257         char *startary;
 258         size_t startary_len = 0;
 259         char *endary;
 260         char *next_boundary;
 261         char *content_type;
 262         char *charset;
 263         size_t content_type_len;
 264         size_t content_length;
 265         char *encoding;
 266         char *disposition;
 267         size_t disposition_len;
 268         char *id;
 269         char *name = NULL;
 270         char *content_type_name;
 271         char *content_disposition_name;
 272         char *filename;
 273         int is_multipart;
 274         int part_seq = 0;
 275         int i;
 276         size_t length;
 277         char nested_partnum[256];
 278         int crlf_in_use = 0;
 279         char *evaluate_crlf_ptr = NULL;
 280         int buflen = 0;
 281         int headerlen = 0;
 282
 283         ptr = content_start;
 284         content_length = 0;
 285
 286         boundary = malloc(SIZ * 12);
 287         *boundary = '\0';
 288
 289         startary = boundary + SIZ * 1;
 290         *startary = '\0';
 291
 292         endary = boundary + SIZ * 2;
 293         *endary = '\0';
 294
 295         header = boundary + SIZ * 3;
 296         *header = '\0';
 297
 298         content_type = boundary + SIZ * 4;
 299         *content_type = '\0';
 300
 301         charset = boundary + SIZ * 5;
 302         *charset = '\0';
 303
 304         encoding = boundary + SIZ * 6;
 305         *encoding = '\0';
 306
 307         content_type_name = boundary + SIZ * 7;
 308         *content_type_name = '\0';
 309
 310         content_disposition_name = boundary + SIZ * 8;
 311         *content_disposition_name = '\0';
 312
 313         filename = boundary + SIZ * 9;
 314         *filename = '\0';
 315
 316         disposition = boundary + SIZ * 10;
 317         *disposition = '\0';
 318
 319         id = boundary + SIZ * 11;
 320         *id = '\0';
 321
 322         /* If the caller didn't supply an endpointer, generate one by measure */
 323         if (content_end == NULL) {
 324                 content_end = &content_start[strlen(content_start)];
 325         }
 326
 327         /* Learn interesting things from the headers */
 328         strcpy(header, "");
 329         headerlen = 0;
 330         do {
 331                 ptr = memreadlinelen(ptr, buf, SIZ, &buflen);
 332                 if (ptr >= content_end) {
 333                         goto end_parser;
 334                 }
 335
 336                 for (i = 0; i < buflen; ++i) {
 337                         if (isspace(buf[i])) {
 338                                 buf[i] = ' ';
 339                         }
 340                 }
 341
 342                 if (!isspace(buf[0])) {
 343                         if (!strncasecmp(header, "Content-type:", 13)) {
 344                                 memcpy (content_type, &header[13], headerlen - 12);
 345                                 content_type_len = striplt (content_type);
 346
 347                                 extract_key(content_type_name, content_type, content_type_len, HKEY("name"), '=');
 348                                 extract_key(charset,           content_type, content_type_len, HKEY("charset"), '=');
 349                                 extract_key(boundary,          header,       headerlen,        HKEY("boundary"), '=');
 350
 351                                 /* Deal with weird headers */
 352                                 if (strchr(content_type, ' '))
 353                                         *(strchr(content_type, ' ')) = '\0';
 354                                 if (strchr(content_type, ';'))
 355                                         *(strchr(content_type, ';')) = '\0';
 356                         }
 357                         else if (!strncasecmp(header, "Content-Disposition:", 20)) {
 358                                 memcpy (disposition, &header[20], headerlen - 19);
 359                                 disposition_len = striplt(disposition);
 360                                 extract_key(content_disposition_name, disposition, disposition_len,  HKEY("name"), '=');
 361                                 extract_key(filename,                 disposition, disposition_len, HKEY("filename"), '=');
 362                         }
 363                         else if (!strncasecmp(header, "Content-ID:", 11)) {
 364                                 strcpy(id, &header[11]);
 365                                 striplt(id);
 366                                 stripallbut(id, '<', '>');
 367                         }
 368                         else if (!strncasecmp(header, "Content-length: ", 15)) {
 369                                 char clbuf[10];
 370                                 safestrncpy(clbuf, &header[15], sizeof clbuf);
 371                                 striplt(clbuf);
 372                                 content_length = (size_t) atol(clbuf);
 373                         }
 374                         else if (!strncasecmp(header, "Content-transfer-encoding: ", 26)) {
 375                                 strcpy(encoding, &header[26]);
 376                                 striplt(encoding);
 377                         }
 378                         strcpy(header, "");
 379                         headerlen = 0;
 380                 }
 381                 if ((headerlen + buflen + 2) < SIZ) {
 382                         memcpy(&header[headerlen], buf, buflen);
 383                         headerlen += buflen;
 384                         header[headerlen] = '\0';
 385                 }
 386         } while ((!IsEmptyStr(buf)) && (*ptr != 0));
 387
 388         if (strchr(disposition, ';'))
 389                 *(strchr(disposition, ';')) = '\0';
 390         striplt(disposition);
 391         if (strchr(content_type, ';'))
 392                 *(strchr(content_type, ';')) = '\0';
 393         striplt(content_type);
 394
 395         if (!IsEmptyStr(boundary)) {
 396                 is_multipart = 1;
 397         } else {
 398                 is_multipart = 0;
 399         }
 400
 401         /* If this is a multipart message, then recursively process it */
 402         part_start = NULL;
 403         if (is_multipart) {
 404
 405                 /* Tell the client about this message's multipartedness */
 406                 if (PreMultiPartCallBack != NULL) {
 407                         PreMultiPartCallBack("", "", partnum, "",
 408                                 NULL, content_type, charset,
 409                                 0, encoding, id, userdata);
 410                 }
 411
 412                 /* Figure out where the boundaries are */
 413                 startary_len = snprintf(startary, SIZ, "--%s", boundary);
 414                 snprintf(endary, SIZ, "--%s--", boundary);
 415
 416                 part_start = NULL;
 417                 do {
 418                         next_boundary = NULL;
 419                         for (srch=ptr; srch<content_end; ++srch) {
 420                                 if (!memcmp(srch, startary, startary_len)) {
 421                                         next_boundary = srch;
 422                                         srch = content_end;
 423                                 }
 424                         }
 425
 426                         if ( (part_start != NULL) && (next_boundary != NULL) ) {
 427                                 part_end = next_boundary;
 428                                 --part_end;             /* omit the trailing LF */
 429                                 if (crlf_in_use) {
 430                                         --part_end;     /* omit the trailing CR */
 431                                 }
 432
 433                                 if (!IsEmptyStr(partnum)) {
 434                                         snprintf(nested_partnum,
 435                                                  sizeof nested_partnum,
 436                                                  "%s.%d", partnum,
 437                                                  ++part_seq);
 438                                 }
 439                                 else {
 440                                         snprintf(nested_partnum,
 441                                                  sizeof nested_partnum,
 442                                                  "%d", ++part_seq);
 443                                 }
 444                                 the_mime_parser(nested_partnum,
 445                                             part_start, part_end,
 446                                                 CallBack,
 447                                                 PreMultiPartCallBack,
 448                                                 PostMultiPartCallBack,
 449                                                 userdata,
 450                                                 dont_decode);
 451                         }
 452
 453                         if (next_boundary != NULL) {
 454                                 /* If we pass out of scope, don't attempt to
 455                                  * read past the end boundary. */
 456                                 if (!strcmp(next_boundary, endary)) {
 457                                         ptr = content_end;
 458                                 }
 459                                 else {
 460                                         /* Set up for the next part. */
 461                                         part_start = strstr(next_boundary, "\n");
 462
 463                                         /* Determine whether newlines are LF or CRLF */
 464                                         evaluate_crlf_ptr = part_start;
 465                                         --evaluate_crlf_ptr;
 466                                         if (!memcmp(evaluate_crlf_ptr, "\r\n", 2)) {
 467                                                 crlf_in_use = 1;
 468                                         }
 469                                         else {
 470                                                 crlf_in_use = 0;
 471                                         }
 472
 473                                         /* Advance past the LF ... now we're in the next part */
 474                                         ++part_start;
 475                                         ptr = part_start;
 476                                 }
 477                         }
 478                         else {
 479                                 /* Invalid end of multipart.  Bail out! */
 480                                 ptr = content_end;
 481                         }
 482                 } while ( (ptr < content_end) && (next_boundary != NULL) );
 483
 484                 if (PostMultiPartCallBack != NULL) {
 485                         PostMultiPartCallBack("", "", partnum, "", NULL,
 486                                 content_type, charset, 0, encoding, id, userdata);
 487                 }
 488                 goto end_parser;
 489         }
 490
 491         /* If it's not a multipart message, then do something with it */
 492         if (!is_multipart) {
 493                 part_start = ptr;
 494                 length = 0;
 495                 while (ptr < content_end) {
 496                         ++ptr;
 497                         ++length;
 498                 }
 499                 part_end = content_end;
 500
 501
 502                 /* The following code will truncate the MIME part to the size
 503                  * specified by the Content-length: header.   We have commented it
 504                  * out because these headers have a tendency to be wrong.
 505                  *
 506                  *      if ( (content_length > 0) && (length > content_length) ) {
 507                  *              length = content_length;
 508                  *      }
 509                  */
 510
 511                 /* Sometimes the "name" field is tacked on to Content-type,
 512                  * and sometimes it's tacked on to Content-disposition.  Use
 513                  * whichever one we have.
 514                  */
 515                 if (strlen(content_disposition_name) > strlen(content_type_name)) {
 516                         name = content_disposition_name;
 517                 }
 518                 else {
 519                         name = content_type_name;
 520                 }
 521
 522                 /* Ok, we've got a non-multipart part here, so do something with it.
 523                  */
 524                 mime_decode(partnum,
 525                         part_start, length,
 526                         content_type, charset, encoding, disposition, id,
 527                         name, filename,
 528                         CallBack, NULL, NULL,
 529                         userdata, dont_decode
 530                 );
 531
 532                 /*
 533                  * Now if it's an encapsulated message/rfc822 then we have to recurse into it
 534                  */
 535                 if (!strcasecmp(content_type, "message/rfc822")) {
 536
 537                         if (PreMultiPartCallBack != NULL) {
 538                                 PreMultiPartCallBack("", "", partnum, "",
 539                                         NULL, content_type, charset,
 540                                         0, encoding, id, userdata);
 541                         }
 542                         if (CallBack != NULL) {
 543                                 if (strlen(partnum) > 0) {
 544                                         snprintf(nested_partnum,
 545                                                  sizeof nested_partnum,
 546                                                  "%s.%d", partnum,
 547                                                  ++part_seq);
 548                                 }
 549                                 else {
 550                                         snprintf(nested_partnum,
 551                                                  sizeof nested_partnum,
 552                                                  "%d", ++part_seq);
 553                                 }
 554                                 the_mime_parser(nested_partnum,
 555                                         part_start, part_end,
 556                                         CallBack,
 557                                         PreMultiPartCallBack,
 558                                         PostMultiPartCallBack,
 559                                         userdata,
 560                                         dont_decode
 561                                 );
 562                         }
 563                         if (PostMultiPartCallBack != NULL) {
 564                                 PostMultiPartCallBack("", "", partnum, "", NULL,
 565                                         content_type, charset, 0, encoding, id, userdata);
 566                         }
 567
 568
 569                 }
 570
 571         }
 572
 573 end_parser:     /* free the buffers!  end the oppression!! */
 574         free(boundary);
 575 }
 576
 577
 578
 579 /*
 580  * Entry point for the MIME parser.
 581  * (This function expects to be fed HEADERS + CONTENT)
 582  * Note: NULL can be supplied as content_end; in this case, the message is
 583  * considered to have ended when the parser encounters a 0x00 byte.
 584  */
 585 void mime_parser(char *content_start,
 586                  char *content_end,
 587                  MimeParserCallBackType CallBack,
 588                  MimeParserCallBackType PreMultiPartCallBack,
 589                  MimeParserCallBackType PostMultiPartCallBack,
 590                  void *userdata,
 591                  int dont_decode)
 592 {
 593
 594         the_mime_parser("", content_start, content_end,
 595                         CallBack,
 596                         PreMultiPartCallBack,
 597                         PostMultiPartCallBack,
 598                         userdata, dont_decode);
 599 }
 600
 601
 602
 603
 604
 605
 606 typedef struct _MimeGuess {
 607         const char *Pattern;
 608         size_t PatternLen;
 609         long PatternOffset;
 610         const char *MimeString;
 611 } MimeGuess;
 612
 613 MimeGuess MyMimes [] = {
 614         {
 615                 "GIF",
 616                 3,
 617                 0,
 618                 "image/gif"
 619         },
 620         {
 621                 "\xff\xd8",
 622                 2,
 623                 0,
 624                 "image/jpeg"
 625         },
 626         {
 627                 "\x89PNG",
 628                 4,
 629                 0,
 630                 "image/png"
 631         },
 632         { // last...
 633                 "",
 634                 0,
 635                 0,
 636                 ""
 637         }
 638 };
 639
 640
 641 const char *GuessMimeType(const char *data, size_t dlen)
 642 {
 643         int MimeIndex = 0;
 644
 645         while (MyMimes[MimeIndex].PatternLen != 0)
 646         {
 647                 if ((MyMimes[MimeIndex].PatternLen +
 648                      MyMimes[MimeIndex].PatternOffset < dlen) &&
 649                     strncmp(MyMimes[MimeIndex].Pattern,
 650                             &data[MyMimes[MimeIndex].PatternOffset],
 651                             MyMimes[MimeIndex].PatternLen) == 0)
 652                 {
 653                         return MyMimes[MimeIndex].MimeString;
 654                 }
 655                 MimeIndex ++;
 656         }
 657         /*
 658          * ok, our simple minded algorythm didn't find anything,
 659          * let the big chegger try it, he wil default to application/octet-stream
 660          */
 661         return (xdg_mime_get_mime_type_for_data(data, dlen));
 662 }
 663
 664
 665 const char* GuessMimeByFilename(const char *what, size_t len)
 666 {
 667         /* we know some hardcoded on our own, try them... */
 668         if ((len > 3) && !strncasecmp(&what[len - 4], ".gif", 4))
 669                 return "image/gif";
 670         else if ((len > 2) && !strncasecmp(&what[len - 3], ".js", 3))
 671                 return  "text/javascript";
 672         else if ((len > 3) && !strncasecmp(&what[len - 4], ".txt", 4))
 673                 return "text/plain";
 674         else if ((len > 3) && !strncasecmp(&what[len - 4], ".css", 4))
 675                 return "text/css";
 676         else if ((len > 3) && !strncasecmp(&what[len - 4], ".jpg", 4))
 677                 return "image/jpeg";
 678         else if ((len > 3) && !strncasecmp(&what[len - 4], ".png", 4))
 679                 return "image/png";
 680         else if ((len > 3) && !strncasecmp(&what[len - 4], ".ico", 4))
 681                 return "image/x-icon";
 682         else if ((len > 3) && !strncasecmp(&what[len - 4], ".vcf", 4))
 683                 return "text/x-vcard";
 684         else if ((len > 4) && !strncasecmp(&what[len - 5], ".html", 5))
 685                 return "text/html";
 686         else if ((len > 3) && !strncasecmp(&what[len - 4], ".htm", 4))
 687                 return "text/html";
 688         else if ((len > 3) && !strncasecmp(&what[len - 4], ".wml", 4))
 689                 return "text/vnd.wap.wml";
 690         else if ((len > 4) && !strncasecmp(&what[len - 5], ".wmls", 5))
 691                 return "text/vnd.wap.wmlscript";
 692         else if ((len > 4) && !strncasecmp(&what[len - 5], ".wmlc", 5))
 693                 return "application/vnd.wap.wmlc";
 694         else if ((len > 5) && !strncasecmp(&what[len - 6], ".wmlsc", 6))
 695                 return "application/vnd.wap.wmlscriptc";
 696         else if ((len > 4) && !strncasecmp(&what[len - 5], ".wbmp", 5))
 697                 return "image/vnd.wap.wbmp";
 698         else
 699                 /* and let xdgmime do the fallback. */
 700                 return xdg_mime_get_mime_type_from_file_name(what);
 701 }
 702
 703 static HashList *IconHash = NULL;
 704
 705 typedef struct IconName IconName;
 706
 707 struct IconName {
 708         char *FlatName;
 709         char *FileName;
 710 };
 711
 712 static void DeleteIcon(void *IconNamePtr)
 713 {
 714         IconName *Icon = (IconName*) IconNamePtr;
 715         free(Icon->FlatName);
 716         free(Icon->FileName);
 717         free(Icon);
 718 }
 719
 720 /*
 721 static const char *PrintFlat(void *IconNamePtr)
 722 {
 723         IconName *Icon = (IconName*) IconNamePtr;
 724         return Icon->FlatName;
 725 }
 726 static const char *PrintFile(void *IconNamePtr)
 727 {
 728         IconName *Icon = (IconName*) IconNamePtr;
 729         return Icon->FileName;
 730 }
 731 */
 732
 733 #define GENSTR "x-generic"
 734 #define IGNORE_PREFIX_1 "gnome-mime"
 735 int LoadIconDir(const char *DirName)
 736 {
 737         DIR *filedir = NULL;
 738         struct dirent *filedir_entry;
 739         int d_namelen;
 740         int d_without_ext;
 741         IconName *Icon;
 742
 743         filedir = opendir (DirName);
 744         IconHash = NewHash(1, NULL);
 745         if (filedir == NULL) {
 746                 return 0;
 747         }
 748
 749         while ((filedir_entry = readdir(filedir)))
 750         {
 751                 char *MinorPtr;
 752                 char *PStart;
 753 #ifdef _DIRENT_HAVE_D_NAMELEN
 754                 d_namelen = filedir_entry->d_namelen;
 755 #else
 756                 d_namelen = strlen(filedir_entry->d_name);
 757 #endif
 758                 d_without_ext = d_namelen;
 759                 while ((d_without_ext > 0) && (filedir_entry->d_name[d_without_ext] != '.'))
 760                         d_without_ext --;
 761                 if ((d_without_ext == 0) || (d_namelen < 3))
 762                         continue;
 763
 764                 if ((sizeof(IGNORE_PREFIX_1) < d_namelen) &&
 765                     (strncmp(IGNORE_PREFIX_1,
 766                              filedir_entry->d_name,
 767                              sizeof(IGNORE_PREFIX_1) - 1) == 0)) {
 768                         PStart = filedir_entry->d_name + sizeof(IGNORE_PREFIX_1);
 769                         d_without_ext -= sizeof(IGNORE_PREFIX_1);
 770                 }
 771                 else {
 772                         PStart = filedir_entry->d_name;
 773                 }
 774                 Icon = malloc(sizeof(IconName));
 775
 776                 Icon->FileName = malloc(d_namelen + 1);
 777                 memcpy(Icon->FileName, filedir_entry->d_name, d_namelen + 1);
 778
 779                 Icon->FlatName = malloc(d_without_ext + 1);
 780                 memcpy(Icon->FlatName, PStart, d_without_ext);
 781                 Icon->FlatName[d_without_ext] = '\0';
 782                 /* Try to find Minor type in image-jpeg */
 783                 MinorPtr = strchr(Icon->FlatName, '-');
 784                 if (MinorPtr != NULL) {
 785                         size_t MinorLen;
 786                         MinorLen = 1 + d_without_ext - (MinorPtr - Icon->FlatName + 1);
 787                         if ((MinorLen == sizeof(GENSTR)) &&
 788                             (strncmp(MinorPtr + 1, GENSTR, sizeof(GENSTR)) == 0)) {
 789                                 /* ok, we found a generic filename. cut the generic. */
 790                                 *MinorPtr = '\0';
 791                                 d_without_ext = d_without_ext - (MinorPtr - Icon->FlatName);
 792                         }
 793                         else { /* Map the major / minor separator to / */
 794                                 *MinorPtr = '/';
 795                         }
 796                 }
 797
 798 //              PrintHash(IconHash, PrintFlat, PrintFile);
 799 //              printf("%s - %s\n", Icon->FlatName, Icon->FileName);
 800                 Put(IconHash, Icon->FlatName, d_without_ext, Icon, DeleteIcon);
 801 //              PrintHash(IconHash, PrintFlat, PrintFile);
 802         }
 803         closedir(filedir);
 804         return 1;
 805 }
 806
 807 const char *GetIconFilename(char *MimeType, size_t len)
 808 {
 809         void *vIcon;
 810         IconName *Icon;
 811
 812         if(IconHash == NULL)
 813                 return NULL;
 814
 815         GetHash(IconHash, MimeType, len, &vIcon), Icon = (IconName*) vIcon;
 816         /* didn't find the exact mimetype? try major only. */
 817         if (Icon == NULL) {
 818                 char * pMinor;
 819                 pMinor = strchr(MimeType, '/');
 820                 if (pMinor != NULL) {
 821                         *pMinor = '\0';
 822                         GetHash(IconHash, MimeType, pMinor - MimeType, &vIcon),
 823                                 Icon = (IconName*) vIcon;
 824                 }
 825         }
 826         if (Icon == NULL) {
 827                 return NULL;
 828         }
 829
 830         /*printf("Getting: [%s] == [%s] -> [%s]\n", MimeType, Icon->FlatName, Icon->FileName);*/
 831         return Icon->FileName;
 832 }
 833
 834 void ShutDownLibCitadelMime(void)
 835 {
 836         DeleteHash(&IconHash);
 837 }