granicus.if.org Git - imagemagick/blob - MagickCore/coder.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                   CCCC   OOO   DDDD    EEEEE  RRRR                          %
   7 %                  C      O   O  D   D   E      R   R                         %
   8 %                  C      O   O  D   D   EEE    RRRR                          %
   9 %                  C      O   O  D   D   E      R R                           %
  10 %                   CCCC   OOO   DDDD    EEEEE  R  R                          %
  11 %                                                                             %
  12 %                                                                             %
  13 %                     MagickCore Image Coder Methods                          %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                   Cristy                                    %
  17 %                                 May 2001                                    %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2014 ImageMagick Studio LLC, a non-profit organization      %
  21 %  dedicated to making software imaging solutions freely available.           %
  22 %                                                                             %
  23 %  You may not use this file except in compliance with the License.  You may  %
  24 %  obtain a copy of the License at                                            %
  25 %                                                                             %
  26 %    http://www.imagemagick.org/script/license.php                            %
  27 %                                                                             %
  28 %  Unless required by applicable law or agreed to in writing, software        %
  29 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  30 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  31 %  See the License for the specific language governing permissions and        %
  32 %  limitations under the License.                                             %
  33 %                                                                             %
  34 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  35 %
  36 %
  37 */
  38 \f
  39 /*
  40   Include declarations.
  41 */
  42 #include "MagickCore/studio.h"
  43 #include "MagickCore/blob.h"
  44 #include "MagickCore/client.h"
  45 #include "MagickCore/coder.h"
  46 #include "MagickCore/coder-private.h"
  47 #include "MagickCore/configure.h"
  48 #include "MagickCore/draw.h"
  49 #include "MagickCore/exception.h"
  50 #include "MagickCore/exception-private.h"
  51 #include "MagickCore/hashmap.h"
  52 #include "MagickCore/log.h"
  53 #include "MagickCore/memory_.h"
  54 #include "MagickCore/option.h"
  55 #include "MagickCore/semaphore.h"
  56 #include "MagickCore/string_.h"
  57 #include "MagickCore/splay-tree.h"
  58 #include "MagickCore/token.h"
  59 #include "MagickCore/utility.h"
  60 #include "MagickCore/utility-private.h"
  61 #include "MagickCore/xml-tree.h"
  62 #include "MagickCore/xml-tree-private.h"
  63 \f
  64 /*
  65   Define declarations.
  66 */
  67 #define MagickCoderFilename  "coder.xml"
  68 \f
  69 /*
  70   Typedef declarations.
  71 */
  72 typedef struct _CoderMapInfo
  73 {
  74   const char
  75     *magick,
  76     *name;
  77 } CoderMapInfo;
  78 \f
  79 /*
  80   Static declarations.
  81 */
  82 static const CoderMapInfo
  83   CoderMap[] =
  84   {
  85     { "3FR", "DNG" },
  86     { "8BIM", "META" },
  87     { "8BIMTEXT", "META" },
  88     { "8BIMWTEXT", "META" },
  89     { "AFM", "TTF" },
  90     { "A", "RAW" },
  91     { "AI", "PDF" },
  92     { "APP1JPEG", "META" },
  93     { "APP1", "META" },
  94     { "ARW", "DNG" },
  95     { "AVI", "MPEG" },
  96     { "BIE", "JBIG" },
  97     { "BMP2", "BMP" },
  98     { "BMP3", "BMP" },
  99     { "B", "RAW" },
 100     { "BRF", "BRAILLE" },
 101     { "BGRA", "BGR" },
 102     { "CMYKA", "CMYK" },
 103     { "C", "RAW" },
 104     { "CAL", "CALS" },
 105     { "CANVAS", "XC" },
 106     { "CR2", "DNG" },
 107     { "CRW", "DNG" },
 108     { "CUR", "ICON" },
 109     { "DCR", "DNG" },
 110     { "DCX", "PCX" },
 111     { "DFONT", "TTF" },
 112     { "EPDF", "PDF" },
 113     { "EPI", "PS" },
 114     { "EPS2", "PS2" },
 115     { "EPS3", "PS3" },
 116     { "EPSF", "PS" },
 117     { "EPSI", "PS" },
 118     { "EPS", "PS" },
 119     { "EPT2", "EPT" },
 120     { "EPT3", "EPT" },
 121     { "ERF", "DNG" },
 122     { "EXIF", "META" },
 123     { "FILE", "URL" },
 124     { "FRACTAL", "PLASMA" },
 125     { "FTP", "URL" },
 126     { "FTS", "FITS" },
 127     { "G3", "FAX" },
 128     { "GIF87", "GIF" },
 129     { "G", "RAW" },
 130     { "GRANITE", "MAGICK" },
 131     { "GROUP4", "TIFF" },
 132     { "GV", "DOT" },
 133     { "K25", "DNG" },
 134     { "KDC", "DNG" },
 135     { "H", "MAGICK" },
 136     { "HTM", "HTML" },
 137     { "HTTP", "URL" },
 138     { "HTTPS", "URL" },
 139     { "ICB", "TGA" },
 140     { "ICC", "META" },
 141     { "ICM", "META" },
 142     { "ICO", "ICON" },
 143     { "IMPLICIT", "***" },
 144     { "IPTC", "META" },
 145     { "IPTCTEXT", "META" },
 146     { "IPTCWTEXT", "META" },
 147     { "ISOBRL", "BRAILLE" },
 148     { "JBG", "JBIG" },
 149     { "JNG", "PNG" },
 150     { "JPC", "JP2" },
 151     { "J2C", "JP2" },
 152     { "J2K", "JP2" },
 153     { "JPG", "JPEG" },
 154     { "JPX", "JP2" },
 155     { "K", "RAW" },
 156     { "LOGO", "MAGICK" },
 157     { "M2V", "MPEG" },
 158     { "M4V", "MPEG" },
 159     { "M", "RAW" },
 160     { "MNG", "PNG" },
 161     { "MOV", "MPEG" },
 162     { "MP4", "MPEG" },
 163     { "MPG", "MPEG" },
 164     { "MPRI", "MPR" },
 165     { "MEF", "DNG" },
 166     { "MRW", "DNG" },
 167     { "MSVG", "SVG" },
 168     { "NEF", "DNG" },
 169     { "NETSCAPE", "MAGICK" },
 170     { "NRW", "DNG" },
 171     { "O", "RAW" },
 172     { "ORF", "DNG" },
 173     { "OTF", "TTF" },
 174     { "P7", "PNM" },
 175     { "PAL", "UYVY" },
 176     { "PAM", "PNM" },
 177     { "PBM", "PNM" },
 178     { "PCDS", "PCD" },
 179     { "PDFA", "PDF" },
 180     { "PEF", "DNG" },
 181     { "PEF", "DNG" },
 182     { "PFA", "TTF" },
 183     { "PFB", "TTF" },
 184     { "PFM", "PNM" },
 185     { "PGM", "PNM" },
 186     { "PGX", "JP2" },
 187     { "PICON", "XPM" },
 188     { "PJPEG", "JPEG" },
 189     { "PM", "XPM" },
 190     { "PNG24", "PNG" },
 191     { "PNG32", "PNG" },
 192     { "PNG8", "PNG" },
 193     { "PPM", "PNM" },
 194     { "PSB", "PSD" },
 195     { "PTIF", "TIFF" },
 196     { "RADIAL-GRADIENT", "GRADIENT" },
 197     { "RAF", "DNG" },
 198     { "RAS", "SUN" },
 199     { "RGBA", "RGB" },
 200     { "RGBO", "RGB" },
 201     { "RMF", "DNG" },
 202     { "R", "RAW" },
 203     { "ROSE", "MAGICK" },
 204     { "RW2", "DNG" },
 205     { "SHTML", "HTML" },
 206     { "SPARSE-COLOR", "TXT" },
 207     { "SR2", "DNG" },
 208     { "SRF", "DNG" },
 209     { "SVGZ", "SVG" },
 210     { "TEXT", "TXT" },
 211     { "TIFF64", "TIFF" },
 212     { "TIF", "TIFF" },
 213     { "TTC", "TTF" },
 214     { "UBRL", "BRAILLE" },
 215     { "VDA", "TGA" },
 216     { "VST", "TGA" },
 217     { "WIZARD", "MAGICK" },
 218 #if defined(MAGICKCORE_WINGDI32_DELEGATE)
 219     { "WMF", "EMF" },
 220 #endif
 221     { "WMV", "MPEG" },
 222     { "WMZ", "WMF" },
 223     { "X3f", "DNG" },
 224     { "XMP", "META" },
 225     { "XTRNARRAY", "XTRN" },
 226     { "XTRNBLOB", "XTRN" },
 227     { "XTRNFILE", "XTRN" },
 228     { "XTRNIMAGE", "XTRN" },
 229     { "XV", "VIFF" },
 230     { "Y", "RAW" },
 231     { "YCbCrA", "YCbCr" }
 232  };
 233
 234 static SemaphoreInfo
 235   *coder_semaphore = (SemaphoreInfo *) NULL;
 236
 237 static SplayTreeInfo
 238   *coder_cache = (SplayTreeInfo *) NULL;
 239 \f
 240 /*
 241   Forward declarations.
 242 */
 243 static MagickBooleanType
 244   IsCoderTreeInstantiated(ExceptionInfo *),
 245   LoadCoderCache(SplayTreeInfo *,const char *,const char *,const size_t,
 246     ExceptionInfo *);
 247 \f
 248 /*
 249 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 250 %                                                                             %
 251 %                                                                             %
 252 %                                                                             %
 253 %  A c q u i r e C o d e r S p l a y T r e e                                  %
 254 %                                                                             %
 255 %                                                                             %
 256 %                                                                             %
 257 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 258 %
 259 %  AcquireCoderCache() caches one or more coder configurations which
 260 %  provides a mapping between coder attributes and a coder name.
 261 %
 262 %  The format of the AcquireCoderCache coder is:
 263 %
 264 %      SplayTreeInfo *AcquireCoderCache(const char *filename,
 265 %        ExceptionInfo *exception)
 266 %
 267 %  A description of each parameter follows:
 268 %
 269 %    o filename: the font file name.
 270 %
 271 %    o exception: return any errors or warnings in this structure.
 272 %
 273 */
 274
 275 static void *DestroyCoderNode(void *coder_info)
 276 {
 277   register CoderInfo
 278     *p;
 279
 280   p=(CoderInfo *) coder_info;
 281   if (p->exempt == MagickFalse)
 282     {
 283       if (p->path != (char *) NULL)
 284         p->path=DestroyString(p->path);
 285       if (p->name != (char *) NULL)
 286         p->name=DestroyString(p->name);
 287       if (p->magick != (char *) NULL)
 288         p->magick=DestroyString(p->magick);
 289     }
 290   return(RelinquishMagickMemory(p));
 291 }
 292
 293 static SplayTreeInfo *AcquireCoderCache(const char *filename,
 294   ExceptionInfo *exception)
 295 {
 296   const StringInfo
 297     *option;
 298
 299   LinkedListInfo
 300     *options;
 301
 302   MagickStatusType
 303     status;
 304
 305   register ssize_t
 306     i;
 307
 308   SplayTreeInfo
 309     *coder_cache;
 310
 311   /*
 312     Load external coder map.
 313   */
 314   coder_cache=NewSplayTree(CompareSplayTreeString,RelinquishMagickMemory,
 315     DestroyCoderNode);
 316   if (coder_cache == (SplayTreeInfo *) NULL)
 317     ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
 318   status=MagickTrue;
 319   options=GetConfigureOptions(filename,exception);
 320   option=(const StringInfo *) GetNextValueInLinkedList(options);
 321   while (option != (const StringInfo *) NULL)
 322   {
 323     status&=LoadCoderCache(coder_cache,(const char *)
 324       GetStringInfoDatum(option),GetStringInfoPath(option),0,exception);
 325     option=(const StringInfo *) GetNextValueInLinkedList(options);
 326   }
 327   options=DestroyConfigureOptions(options);
 328   /*
 329     Load built-in coder map.
 330   */
 331   for (i=0; i < (ssize_t) (sizeof(CoderMap)/sizeof(*CoderMap)); i++)
 332   {
 333     CoderInfo
 334       *coder_info;
 335
 336     register const CoderMapInfo
 337       *p;
 338
 339     p=CoderMap+i;
 340     coder_info=(CoderInfo *) AcquireMagickMemory(sizeof(*coder_info));
 341     if (coder_info == (CoderInfo *) NULL)
 342       {
 343         (void) ThrowMagickException(exception,GetMagickModule(),
 344           ResourceLimitError,"MemoryAllocationFailed","`%s'",p->name);
 345         continue;
 346       }
 347     (void) ResetMagickMemory(coder_info,0,sizeof(*coder_info));
 348     coder_info->path=(char *) "[built-in]";
 349     coder_info->magick=(char *) p->magick;
 350     coder_info->name=(char *) p->name;
 351     coder_info->exempt=MagickTrue;
 352     coder_info->signature=MagickSignature;
 353     status&=AddValueToSplayTree(coder_cache,ConstantString(coder_info->magick),
 354       coder_info);
 355     if (status == MagickFalse)
 356       (void) ThrowMagickException(exception,GetMagickModule(),
 357         ResourceLimitError,"MemoryAllocationFailed","`%s'",coder_info->name);
 358   }
 359   return(coder_cache);
 360 }
 361 \f
 362 /*
 363 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 364 %                                                                             %
 365 %                                                                             %
 366 %                                                                             %
 367 +   C o d e r C o m p o n e n t G e n e s i s                                 %
 368 %                                                                             %
 369 %                                                                             %
 370 %                                                                             %
 371 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 372 %
 373 %  CoderComponentGenesis() instantiates the coder component.
 374 %
 375 %  The format of the CoderComponentGenesis method is:
 376 %
 377 %      MagickBooleanType CoderComponentGenesis(void)
 378 %
 379 */
 380 MagickPrivate MagickBooleanType CoderComponentGenesis(void)
 381 {
 382   if (coder_semaphore == (SemaphoreInfo *) NULL)
 383     coder_semaphore=AcquireSemaphoreInfo();
 384   return(MagickTrue);
 385 }
 386 \f
 387 /*
 388 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 389 %                                                                             %
 390 %                                                                             %
 391 %                                                                             %
 392 +   C o d e r C o m p o n e n t T e r m i n u s                               %
 393 %                                                                             %
 394 %                                                                             %
 395 %                                                                             %
 396 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 397 %
 398 %  CoderComponentTerminus() destroys the coder component.
 399 %
 400 %  The format of the CoderComponentTerminus method is:
 401 %
 402 %      CoderComponentTerminus(void)
 403 %
 404 */
 405 MagickPrivate void CoderComponentTerminus(void)
 406 {
 407   if (coder_semaphore == (SemaphoreInfo *) NULL)
 408     ActivateSemaphoreInfo(&coder_semaphore);
 409   LockSemaphoreInfo(coder_semaphore);
 410   if (coder_cache != (SplayTreeInfo *) NULL)
 411     coder_cache=DestroySplayTree(coder_cache);
 412   UnlockSemaphoreInfo(coder_semaphore);
 413   RelinquishSemaphoreInfo(&coder_semaphore);
 414 }
 415 \f
 416 /*
 417 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 418 %                                                                             %
 419 %                                                                             %
 420 %                                                                             %
 421 +   G e t C o d e r I n f o                                                   %
 422 %                                                                             %
 423 %                                                                             %
 424 %                                                                             %
 425 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 426 %
 427 %  GetCoderInfo searches the coder list for the specified name and if found
 428 %  returns attributes for that coder.
 429 %
 430 %  The format of the GetCoderInfo method is:
 431 %
 432 %      const CoderInfo *GetCoderInfo(const char *name,ExceptionInfo *exception)
 433 %
 434 %  A description of each parameter follows:
 435 %
 436 %    o name: the coder name.
 437 %
 438 %    o exception: return any errors or warnings in this structure.
 439 %
 440 */
 441 MagickExport const CoderInfo *GetCoderInfo(const char *name,
 442   ExceptionInfo *exception)
 443 {
 444   const CoderInfo
 445     *coder_info;
 446
 447   assert(exception != (ExceptionInfo *) NULL);
 448   if (IsCoderTreeInstantiated(exception) == MagickFalse)
 449     return((const CoderInfo *) NULL);
 450   LockSemaphoreInfo(coder_semaphore);
 451   if ((name == (const char *) NULL) || (LocaleCompare(name,"*") == 0))
 452     {
 453       ResetSplayTreeIterator(coder_cache);
 454       coder_info=(const CoderInfo *) GetNextValueInSplayTree(coder_cache);
 455       UnlockSemaphoreInfo(coder_semaphore);
 456       return(coder_info);
 457     }
 458   coder_info=(const CoderInfo *) GetValueFromSplayTree(coder_cache,name);
 459   UnlockSemaphoreInfo(coder_semaphore);
 460   return(coder_info);
 461 }
 462 \f
 463 /*
 464 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 465 %                                                                             %
 466 %                                                                             %
 467 %                                                                             %
 468 %   G e t C o d e r I n f o L i s t                                           %
 469 %                                                                             %
 470 %                                                                             %
 471 %                                                                             %
 472 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 473 %
 474 %  GetCoderInfoList() returns any coder_map that match the specified pattern.
 475 %  The format of the GetCoderInfoList function is:
 476 %
 477 %      const CoderInfo **GetCoderInfoList(const char *pattern,
 478 %        size_t *number_coders,ExceptionInfo *exception)
 479 %
 480 %  A description of each parameter follows:
 481 %
 482 %    o pattern: Specifies a pointer to a text string containing a pattern.
 483 %
 484 %    o number_coders:  This integer returns the number of coders in the list.
 485 %
 486 %    o exception: return any errors or warnings in this structure.
 487 %
 488 */
 489
 490 static int CoderInfoCompare(const void *x,const void *y)
 491 {
 492   const CoderInfo
 493     **p,
 494     **q;
 495
 496   p=(const CoderInfo **) x,
 497   q=(const CoderInfo **) y;
 498   if (LocaleCompare((*p)->path,(*q)->path) == 0)
 499     return(LocaleCompare((*p)->name,(*q)->name));
 500   return(LocaleCompare((*p)->path,(*q)->path));
 501 }
 502
 503 MagickExport const CoderInfo **GetCoderInfoList(const char *pattern,
 504   size_t *number_coders,ExceptionInfo *exception)
 505 {
 506   const CoderInfo
 507     **coder_map;
 508
 509   register const CoderInfo
 510     *p;
 511
 512   register ssize_t
 513     i;
 514
 515   /*
 516     Allocate coder list.
 517   */
 518   assert(pattern != (char *) NULL);
 519   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",pattern);
 520   assert(number_coders != (size_t *) NULL);
 521   *number_coders=0;
 522   p=GetCoderInfo("*",exception);
 523   if (p == (const CoderInfo *) NULL)
 524     return((const CoderInfo **) NULL);
 525   coder_map=(const CoderInfo **) AcquireQuantumMemory((size_t)
 526     GetNumberOfNodesInSplayTree(coder_cache)+1UL,sizeof(*coder_map));
 527   if (coder_map == (const CoderInfo **) NULL)
 528     return((const CoderInfo **) NULL);
 529   /*
 530     Generate coder list.
 531   */
 532   LockSemaphoreInfo(coder_semaphore);
 533   ResetSplayTreeIterator(coder_cache);
 534   p=(const CoderInfo *) GetNextValueInSplayTree(coder_cache);
 535   for (i=0; p != (const CoderInfo *) NULL; )
 536   {
 537     if ((p->stealth == MagickFalse) &&
 538         (GlobExpression(p->name,pattern,MagickFalse) != MagickFalse))
 539       coder_map[i++]=p;
 540     p=(const CoderInfo *) GetNextValueInSplayTree(coder_cache);
 541   }
 542   UnlockSemaphoreInfo(coder_semaphore);
 543   qsort((void *) coder_map,(size_t) i,sizeof(*coder_map),CoderInfoCompare);
 544   coder_map[i]=(CoderInfo *) NULL;
 545   *number_coders=(size_t) i;
 546   return(coder_map);
 547 }
 548 \f
 549 /*
 550 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 551 %                                                                             %
 552 %                                                                             %
 553 %                                                                             %
 554 %   G e t C o d e r L i s t                                                   %
 555 %                                                                             %
 556 %                                                                             %
 557 %                                                                             %
 558 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 559 %
 560 %  GetCoderList() returns any coder_map that match the specified pattern.
 561 %
 562 %  The format of the GetCoderList function is:
 563 %
 564 %      char **GetCoderList(const char *pattern,size_t *number_coders,
 565 %        ExceptionInfo *exception)
 566 %
 567 %  A description of each parameter follows:
 568 %
 569 %    o pattern: Specifies a pointer to a text string containing a pattern.
 570 %
 571 %    o number_coders:  This integer returns the number of coders in the list.
 572 %
 573 %    o exception: return any errors or warnings in this structure.
 574 %
 575 */
 576
 577 static int CoderCompare(const void *x,const void *y)
 578 {
 579   register const char
 580     **p,
 581     **q;
 582
 583   p=(const char **) x;
 584   q=(const char **) y;
 585   return(LocaleCompare(*p,*q));
 586 }
 587
 588 MagickExport char **GetCoderList(const char *pattern,
 589   size_t *number_coders,ExceptionInfo *exception)
 590 {
 591   char
 592     **coder_map;
 593
 594   register const CoderInfo
 595     *p;
 596
 597   register ssize_t
 598     i;
 599
 600   /*
 601     Allocate coder list.
 602   */
 603   assert(pattern != (char *) NULL);
 604   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",pattern);
 605   assert(number_coders != (size_t *) NULL);
 606   *number_coders=0;
 607   p=GetCoderInfo("*",exception);
 608   if (p == (const CoderInfo *) NULL)
 609     return((char **) NULL);
 610   coder_map=(char **) AcquireQuantumMemory((size_t)
 611     GetNumberOfNodesInSplayTree(coder_cache)+1UL,sizeof(*coder_map));
 612   if (coder_map == (char **) NULL)
 613     return((char **) NULL);
 614   /*
 615     Generate coder list.
 616   */
 617   LockSemaphoreInfo(coder_semaphore);
 618   ResetSplayTreeIterator(coder_cache);
 619   p=(const CoderInfo *) GetNextValueInSplayTree(coder_cache);
 620   for (i=0; p != (const CoderInfo *) NULL; )
 621   {
 622     if ((p->stealth == MagickFalse) &&
 623         (GlobExpression(p->name,pattern,MagickFalse) != MagickFalse))
 624       coder_map[i++]=ConstantString(p->name);
 625     p=(const CoderInfo *) GetNextValueInSplayTree(coder_cache);
 626   }
 627   UnlockSemaphoreInfo(coder_semaphore);
 628   qsort((void *) coder_map,(size_t) i,sizeof(*coder_map),CoderCompare);
 629   coder_map[i]=(char *) NULL;
 630   *number_coders=(size_t) i;
 631   return(coder_map);
 632 }
 633 \f
 634 /*
 635 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 636 %                                                                             %
 637 %                                                                             %
 638 %                                                                             %
 639 +   I s C o d e r T r e e I n s t a n t i a t e d                             %
 640 %                                                                             %
 641 %                                                                             %
 642 %                                                                             %
 643 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 644 %
 645 %  IsCoderTreeInstantiated() determines if the coder tree is instantiated.  If
 646 %  not, it instantiates the tree and returns it.
 647 %
 648 %  The format of the IsCoderInstantiated method is:
 649 %
 650 %      MagickBooleanType IsCoderTreeInstantiated(ExceptionInfo *exception)
 651 %
 652 %  A description of each parameter follows.
 653 %
 654 %    o exception: return any errors or warnings in this structure.
 655 %
 656 */
 657 static MagickBooleanType IsCoderTreeInstantiated(ExceptionInfo *exception)
 658 {
 659   if (coder_cache == (SplayTreeInfo *) NULL)
 660     {
 661       if (coder_semaphore == (SemaphoreInfo *) NULL)
 662         ActivateSemaphoreInfo(&coder_semaphore);
 663       LockSemaphoreInfo(coder_semaphore);
 664       if (coder_cache == (SplayTreeInfo *) NULL)
 665         coder_cache=AcquireCoderCache(MagickCoderFilename,exception);
 666       UnlockSemaphoreInfo(coder_semaphore);
 667     }
 668   return(coder_cache != (SplayTreeInfo *) NULL ? MagickTrue : MagickFalse);
 669 }
 670 \f
 671 /*
 672 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 673 %                                                                             %
 674 %                                                                             %
 675 %                                                                             %
 676 %  L i s t C o d e r I n f o                                                  %
 677 %                                                                             %
 678 %                                                                             %
 679 %                                                                             %
 680 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 681 %
 682 %  ListCoderInfo() lists the coder info to a file.
 683 %
 684 %  The format of the ListCoderInfo coder is:
 685 %
 686 %      MagickBooleanType ListCoderInfo(FILE *file,ExceptionInfo *exception)
 687 %
 688 %  A description of each parameter follows.
 689 %
 690 %    o file:  An pointer to a FILE.
 691 %
 692 %    o exception: return any errors or warnings in this structure.
 693 %
 694 */
 695 MagickExport MagickBooleanType ListCoderInfo(FILE *file,
 696   ExceptionInfo *exception)
 697 {
 698   const char
 699     *path;
 700
 701   const CoderInfo
 702     **coder_info;
 703
 704   register ssize_t
 705     i;
 706
 707   size_t
 708     number_coders;
 709
 710   ssize_t
 711     j;
 712
 713   if (file == (const FILE *) NULL)
 714     file=stdout;
 715   coder_info=GetCoderInfoList("*",&number_coders,exception);
 716   if (coder_info == (const CoderInfo **) NULL)
 717     return(MagickFalse);
 718   path=(const char *) NULL;
 719   for (i=0; i < (ssize_t) number_coders; i++)
 720   {
 721     if (coder_info[i]->stealth != MagickFalse)
 722       continue;
 723     if ((path == (const char *) NULL) ||
 724         (LocaleCompare(path,coder_info[i]->path) != 0))
 725       {
 726         if (coder_info[i]->path != (char *) NULL)
 727           (void) FormatLocaleFile(file,"\nPath: %s\n\n",coder_info[i]->path);
 728         (void) FormatLocaleFile(file,"Magick      Coder\n");
 729         (void) FormatLocaleFile(file,
 730           "-------------------------------------------------"
 731           "------------------------------\n");
 732       }
 733     path=coder_info[i]->path;
 734     (void) FormatLocaleFile(file,"%s",coder_info[i]->magick);
 735     for (j=(ssize_t) strlen(coder_info[i]->magick); j <= 11; j++)
 736       (void) FormatLocaleFile(file," ");
 737     if (coder_info[i]->name != (char *) NULL)
 738       (void) FormatLocaleFile(file,"%s",coder_info[i]->name);
 739     (void) FormatLocaleFile(file,"\n");
 740   }
 741   coder_info=(const CoderInfo **) RelinquishMagickMemory((void *) coder_info);
 742   (void) fflush(file);
 743   return(MagickTrue);
 744 }
 745 \f
 746 /*
 747 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 748 %                                                                             %
 749 %                                                                             %
 750 %                                                                             %
 751 +   L o a d C o d e r L i s t                                                 %
 752 %                                                                             %
 753 %                                                                             %
 754 %                                                                             %
 755 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 756 %
 757 %  LoadCoderCache() loads the coder configurations which provides a
 758 %  mapping between coder attributes and a coder name.
 759 %
 760 %  The format of the LoadCoderCache coder is:
 761 %
 762 %      MagickBooleanType LoadCoderCache(SplayTreeInfo *coder_cache,
 763 %        const char *xml,const char *filename,const size_t depth,
 764 %        ExceptionInfo *exception)
 765 %
 766 %  A description of each parameter follows:
 767 %
 768 %    o xml:  The coder list in XML format.
 769 %
 770 %    o filename:  The coder list filename.
 771 %
 772 %    o depth: depth of <include /> statements.
 773 %
 774 %    o exception: return any errors or warnings in this structure.
 775 %
 776 */
 777 static MagickBooleanType LoadCoderCache(SplayTreeInfo *coder_cache,
 778   const char *xml,const char *filename,const size_t depth,
 779   ExceptionInfo *exception)
 780 {
 781   char
 782     keyword[MaxTextExtent],
 783     *token;
 784
 785   const char
 786     *q;
 787
 788   CoderInfo
 789     *coder_info;
 790
 791   MagickBooleanType
 792     status;
 793
 794   /*
 795     Load the coder map file.
 796   */
 797   (void) LogMagickEvent(ConfigureEvent,GetMagickModule(),
 798     "Loading coder configuration file \"%s\" ...",filename);
 799   if (xml == (const char *) NULL)
 800     return(MagickFalse);
 801   status=MagickTrue;
 802   coder_info=(CoderInfo *) NULL;
 803   token=AcquireString(xml);
 804   for (q=(char *) xml; *q != '\0'; )
 805   {
 806     /*
 807       Interpret XML.
 808     */
 809     GetMagickToken(q,&q,token);
 810     if (*token == '\0')
 811       break;
 812     (void) CopyMagickString(keyword,token,MaxTextExtent);
 813     if (LocaleNCompare(keyword,"<!DOCTYPE",9) == 0)
 814       {
 815         /*
 816           Doctype element.
 817         */
 818         while ((LocaleNCompare(q,"]>",2) != 0) && (*q != '\0'))
 819           GetMagickToken(q,&q,token);
 820         continue;
 821       }
 822     if (LocaleNCompare(keyword,"<!--",4) == 0)
 823       {
 824         /*
 825           Comment element.
 826         */
 827         while ((LocaleNCompare(q,"->",2) != 0) && (*q != '\0'))
 828           GetMagickToken(q,&q,token);
 829         continue;
 830       }
 831     if (LocaleCompare(keyword,"<include") == 0)
 832       {
 833         /*
 834           Include element.
 835         */
 836         while (((*token != '/') && (*(token+1) != '>')) && (*q != '\0'))
 837         {
 838           (void) CopyMagickString(keyword,token,MaxTextExtent);
 839           GetMagickToken(q,&q,token);
 840           if (*token != '=')
 841             continue;
 842           GetMagickToken(q,&q,token);
 843           if (LocaleCompare(keyword,"file") == 0)
 844             {
 845               if (depth > 200)
 846                 (void) ThrowMagickException(exception,GetMagickModule(),
 847                   ConfigureError,"IncludeNodeNestedTooDeeply","`%s'",token);
 848               else
 849                 {
 850                   char
 851                     path[MaxTextExtent],
 852                     *xml;
 853
 854                   GetPathComponent(filename,HeadPath,path);
 855                   if (*path != '\0')
 856                     (void) ConcatenateMagickString(path,DirectorySeparator,
 857                       MaxTextExtent);
 858                   if (*token == *DirectorySeparator)
 859                     (void) CopyMagickString(path,token,MaxTextExtent);
 860                   else
 861                     (void) ConcatenateMagickString(path,token,MaxTextExtent);
 862                   xml=FileToXML(path,~0UL);
 863                   if (xml != (char *) NULL)
 864                     {
 865                       status&=LoadCoderCache(coder_cache,xml,path,depth+1,
 866                         exception);
 867                       xml=(char *) RelinquishMagickMemory(xml);
 868                     }
 869                 }
 870             }
 871         }
 872         continue;
 873       }
 874     if (LocaleCompare(keyword,"<coder") == 0)
 875       {
 876         /*
 877           Coder element.
 878         */
 879         coder_info=(CoderInfo *) AcquireMagickMemory(sizeof(*coder_info));
 880         if (coder_info == (CoderInfo *) NULL)
 881           ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
 882         (void) ResetMagickMemory(coder_info,0,sizeof(*coder_info));
 883         coder_info->path=ConstantString(filename);
 884         coder_info->exempt=MagickFalse;
 885         coder_info->signature=MagickSignature;
 886         continue;
 887       }
 888     if (coder_info == (CoderInfo *) NULL)
 889       continue;
 890     if (LocaleCompare(keyword,"/>") == 0)
 891       {
 892         status=AddValueToSplayTree(coder_cache,ConstantString(
 893           coder_info->magick),coder_info);
 894         if (status == MagickFalse)
 895           (void) ThrowMagickException(exception,GetMagickModule(),
 896             ResourceLimitError,"MemoryAllocationFailed","`%s'",
 897             coder_info->magick);
 898         coder_info=(CoderInfo *) NULL;
 899         continue;
 900       }
 901     GetMagickToken(q,(const char **) NULL,token);
 902     if (*token != '=')
 903       continue;
 904     GetMagickToken(q,&q,token);
 905     GetMagickToken(q,&q,token);
 906     switch (*keyword)
 907     {
 908       case 'M':
 909       case 'm':
 910       {
 911         if (LocaleCompare((char *) keyword,"magick") == 0)
 912           {
 913             coder_info->magick=ConstantString(token);
 914             break;
 915           }
 916         break;
 917       }
 918       case 'N':
 919       case 'n':
 920       {
 921         if (LocaleCompare((char *) keyword,"name") == 0)
 922           {
 923             coder_info->name=ConstantString(token);
 924             break;
 925           }
 926         break;
 927       }
 928       case 'S':
 929       case 's':
 930       {
 931         if (LocaleCompare((char *) keyword,"stealth") == 0)
 932           {
 933             coder_info->stealth=IsStringTrue(token);
 934             break;
 935           }
 936         break;
 937       }
 938       default:
 939         break;
 940     }
 941   }
 942   token=(char *) RelinquishMagickMemory(token);
 943   return(status);
 944 }