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   coder_semaphore=AcquireSemaphoreInfo();
 383   return(MagickTrue);
 384 }
 385 \f
 386 /*
 387 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 388 %                                                                             %
 389 %                                                                             %
 390 %                                                                             %
 391 +   C o d e r C o m p o n e n t T e r m i n u s                               %
 392 %                                                                             %
 393 %                                                                             %
 394 %                                                                             %
 395 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 396 %
 397 %  CoderComponentTerminus() destroys the coder component.
 398 %
 399 %  The format of the CoderComponentTerminus method is:
 400 %
 401 %      CoderComponentTerminus(void)
 402 %
 403 */
 404 MagickPrivate void CoderComponentTerminus(void)
 405 {
 406   if (coder_semaphore == (SemaphoreInfo *) NULL)
 407     ActivateSemaphoreInfo(&coder_semaphore);
 408   LockSemaphoreInfo(coder_semaphore);
 409   if (coder_cache != (SplayTreeInfo *) NULL)
 410     coder_cache=DestroySplayTree(coder_cache);
 411   UnlockSemaphoreInfo(coder_semaphore);
 412   RelinquishSemaphoreInfo(&coder_semaphore);
 413 }
 414 \f
 415 /*
 416 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 417 %                                                                             %
 418 %                                                                             %
 419 %                                                                             %
 420 +   G e t C o d e r I n f o                                                   %
 421 %                                                                             %
 422 %                                                                             %
 423 %                                                                             %
 424 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 425 %
 426 %  GetCoderInfo searches the coder list for the specified name and if found
 427 %  returns attributes for that coder.
 428 %
 429 %  The format of the GetCoderInfo method is:
 430 %
 431 %      const CoderInfo *GetCoderInfo(const char *name,ExceptionInfo *exception)
 432 %
 433 %  A description of each parameter follows:
 434 %
 435 %    o name: the coder name.
 436 %
 437 %    o exception: return any errors or warnings in this structure.
 438 %
 439 */
 440 MagickExport const CoderInfo *GetCoderInfo(const char *name,
 441   ExceptionInfo *exception)
 442 {
 443   const CoderInfo
 444     *coder_info;
 445
 446   assert(exception != (ExceptionInfo *) NULL);
 447   if (IsCoderTreeInstantiated(exception) == MagickFalse)
 448     return((const CoderInfo *) NULL);
 449   LockSemaphoreInfo(coder_semaphore);
 450   if ((name == (const char *) NULL) || (LocaleCompare(name,"*") == 0))
 451     {
 452       ResetSplayTreeIterator(coder_cache);
 453       coder_info=(const CoderInfo *) GetNextValueInSplayTree(coder_cache);
 454       UnlockSemaphoreInfo(coder_semaphore);
 455       return(coder_info);
 456     }
 457   coder_info=(const CoderInfo *) GetValueFromSplayTree(coder_cache,name);
 458   UnlockSemaphoreInfo(coder_semaphore);
 459   return(coder_info);
 460 }
 461 \f
 462 /*
 463 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 464 %                                                                             %
 465 %                                                                             %
 466 %                                                                             %
 467 %   G e t C o d e r I n f o L i s t                                           %
 468 %                                                                             %
 469 %                                                                             %
 470 %                                                                             %
 471 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 472 %
 473 %  GetCoderInfoList() returns any coder_map that match the specified pattern.
 474 %  The format of the GetCoderInfoList function is:
 475 %
 476 %      const CoderInfo **GetCoderInfoList(const char *pattern,
 477 %        size_t *number_coders,ExceptionInfo *exception)
 478 %
 479 %  A description of each parameter follows:
 480 %
 481 %    o pattern: Specifies a pointer to a text string containing a pattern.
 482 %
 483 %    o number_coders:  This integer returns the number of coders in the list.
 484 %
 485 %    o exception: return any errors or warnings in this structure.
 486 %
 487 */
 488
 489 static int CoderInfoCompare(const void *x,const void *y)
 490 {
 491   const CoderInfo
 492     **p,
 493     **q;
 494
 495   p=(const CoderInfo **) x,
 496   q=(const CoderInfo **) y;
 497   if (LocaleCompare((*p)->path,(*q)->path) == 0)
 498     return(LocaleCompare((*p)->name,(*q)->name));
 499   return(LocaleCompare((*p)->path,(*q)->path));
 500 }
 501
 502 MagickExport const CoderInfo **GetCoderInfoList(const char *pattern,
 503   size_t *number_coders,ExceptionInfo *exception)
 504 {
 505   const CoderInfo
 506     **coder_map;
 507
 508   register const CoderInfo
 509     *p;
 510
 511   register ssize_t
 512     i;
 513
 514   /*
 515     Allocate coder list.
 516   */
 517   assert(pattern != (char *) NULL);
 518   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",pattern);
 519   assert(number_coders != (size_t *) NULL);
 520   *number_coders=0;
 521   p=GetCoderInfo("*",exception);
 522   if (p == (const CoderInfo *) NULL)
 523     return((const CoderInfo **) NULL);
 524   coder_map=(const CoderInfo **) AcquireQuantumMemory((size_t)
 525     GetNumberOfNodesInSplayTree(coder_cache)+1UL,sizeof(*coder_map));
 526   if (coder_map == (const CoderInfo **) NULL)
 527     return((const CoderInfo **) NULL);
 528   /*
 529     Generate coder list.
 530   */
 531   LockSemaphoreInfo(coder_semaphore);
 532   ResetSplayTreeIterator(coder_cache);
 533   p=(const CoderInfo *) GetNextValueInSplayTree(coder_cache);
 534   for (i=0; p != (const CoderInfo *) NULL; )
 535   {
 536     if ((p->stealth == MagickFalse) &&
 537         (GlobExpression(p->name,pattern,MagickFalse) != MagickFalse))
 538       coder_map[i++]=p;
 539     p=(const CoderInfo *) GetNextValueInSplayTree(coder_cache);
 540   }
 541   UnlockSemaphoreInfo(coder_semaphore);
 542   qsort((void *) coder_map,(size_t) i,sizeof(*coder_map),CoderInfoCompare);
 543   coder_map[i]=(CoderInfo *) NULL;
 544   *number_coders=(size_t) i;
 545   return(coder_map);
 546 }
 547 \f
 548 /*
 549 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 550 %                                                                             %
 551 %                                                                             %
 552 %                                                                             %
 553 %   G e t C o d e r L i s t                                                   %
 554 %                                                                             %
 555 %                                                                             %
 556 %                                                                             %
 557 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 558 %
 559 %  GetCoderList() returns any coder_map that match the specified pattern.
 560 %
 561 %  The format of the GetCoderList function is:
 562 %
 563 %      char **GetCoderList(const char *pattern,size_t *number_coders,
 564 %        ExceptionInfo *exception)
 565 %
 566 %  A description of each parameter follows:
 567 %
 568 %    o pattern: Specifies a pointer to a text string containing a pattern.
 569 %
 570 %    o number_coders:  This integer returns the number of coders in the list.
 571 %
 572 %    o exception: return any errors or warnings in this structure.
 573 %
 574 */
 575
 576 static int CoderCompare(const void *x,const void *y)
 577 {
 578   register const char
 579     **p,
 580     **q;
 581
 582   p=(const char **) x;
 583   q=(const char **) y;
 584   return(LocaleCompare(*p,*q));
 585 }
 586
 587 MagickExport char **GetCoderList(const char *pattern,
 588   size_t *number_coders,ExceptionInfo *exception)
 589 {
 590   char
 591     **coder_map;
 592
 593   register const CoderInfo
 594     *p;
 595
 596   register ssize_t
 597     i;
 598
 599   /*
 600     Allocate coder list.
 601   */
 602   assert(pattern != (char *) NULL);
 603   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",pattern);
 604   assert(number_coders != (size_t *) NULL);
 605   *number_coders=0;
 606   p=GetCoderInfo("*",exception);
 607   if (p == (const CoderInfo *) NULL)
 608     return((char **) NULL);
 609   coder_map=(char **) AcquireQuantumMemory((size_t)
 610     GetNumberOfNodesInSplayTree(coder_cache)+1UL,sizeof(*coder_map));
 611   if (coder_map == (char **) NULL)
 612     return((char **) NULL);
 613   /*
 614     Generate coder list.
 615   */
 616   LockSemaphoreInfo(coder_semaphore);
 617   ResetSplayTreeIterator(coder_cache);
 618   p=(const CoderInfo *) GetNextValueInSplayTree(coder_cache);
 619   for (i=0; p != (const CoderInfo *) NULL; )
 620   {
 621     if ((p->stealth == MagickFalse) &&
 622         (GlobExpression(p->name,pattern,MagickFalse) != MagickFalse))
 623       coder_map[i++]=ConstantString(p->name);
 624     p=(const CoderInfo *) GetNextValueInSplayTree(coder_cache);
 625   }
 626   UnlockSemaphoreInfo(coder_semaphore);
 627   qsort((void *) coder_map,(size_t) i,sizeof(*coder_map),CoderCompare);
 628   coder_map[i]=(char *) NULL;
 629   *number_coders=(size_t) i;
 630   return(coder_map);
 631 }
 632 \f
 633 /*
 634 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 635 %                                                                             %
 636 %                                                                             %
 637 %                                                                             %
 638 +   I s C o d e r T r e e I n s t a n t i a t e d                             %
 639 %                                                                             %
 640 %                                                                             %
 641 %                                                                             %
 642 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 643 %
 644 %  IsCoderTreeInstantiated() determines if the coder tree is instantiated.  If
 645 %  not, it instantiates the tree and returns it.
 646 %
 647 %  The format of the IsCoderInstantiated method is:
 648 %
 649 %      MagickBooleanType IsCoderTreeInstantiated(ExceptionInfo *exception)
 650 %
 651 %  A description of each parameter follows.
 652 %
 653 %    o exception: return any errors or warnings in this structure.
 654 %
 655 */
 656 static MagickBooleanType IsCoderTreeInstantiated(ExceptionInfo *exception)
 657 {
 658   if (coder_cache == (SplayTreeInfo *) NULL)
 659     {
 660       if (coder_semaphore == (SemaphoreInfo *) NULL)
 661         ActivateSemaphoreInfo(&coder_semaphore);
 662       LockSemaphoreInfo(coder_semaphore);
 663       if (coder_cache == (SplayTreeInfo *) NULL)
 664         coder_cache=AcquireCoderCache(MagickCoderFilename,exception);
 665       UnlockSemaphoreInfo(coder_semaphore);
 666     }
 667   return(coder_cache != (SplayTreeInfo *) NULL ? MagickTrue : MagickFalse);
 668 }
 669 \f
 670 /*
 671 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 672 %                                                                             %
 673 %                                                                             %
 674 %                                                                             %
 675 %  L i s t C o d e r I n f o                                                  %
 676 %                                                                             %
 677 %                                                                             %
 678 %                                                                             %
 679 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 680 %
 681 %  ListCoderInfo() lists the coder info to a file.
 682 %
 683 %  The format of the ListCoderInfo coder is:
 684 %
 685 %      MagickBooleanType ListCoderInfo(FILE *file,ExceptionInfo *exception)
 686 %
 687 %  A description of each parameter follows.
 688 %
 689 %    o file:  An pointer to a FILE.
 690 %
 691 %    o exception: return any errors or warnings in this structure.
 692 %
 693 */
 694 MagickExport MagickBooleanType ListCoderInfo(FILE *file,
 695   ExceptionInfo *exception)
 696 {
 697   const char
 698     *path;
 699
 700   const CoderInfo
 701     **coder_info;
 702
 703   register ssize_t
 704     i;
 705
 706   size_t
 707     number_coders;
 708
 709   ssize_t
 710     j;
 711
 712   if (file == (const FILE *) NULL)
 713     file=stdout;
 714   coder_info=GetCoderInfoList("*",&number_coders,exception);
 715   if (coder_info == (const CoderInfo **) NULL)
 716     return(MagickFalse);
 717   path=(const char *) NULL;
 718   for (i=0; i < (ssize_t) number_coders; i++)
 719   {
 720     if (coder_info[i]->stealth != MagickFalse)
 721       continue;
 722     if ((path == (const char *) NULL) ||
 723         (LocaleCompare(path,coder_info[i]->path) != 0))
 724       {
 725         if (coder_info[i]->path != (char *) NULL)
 726           (void) FormatLocaleFile(file,"\nPath: %s\n\n",coder_info[i]->path);
 727         (void) FormatLocaleFile(file,"Magick      Coder\n");
 728         (void) FormatLocaleFile(file,
 729           "-------------------------------------------------"
 730           "------------------------------\n");
 731       }
 732     path=coder_info[i]->path;
 733     (void) FormatLocaleFile(file,"%s",coder_info[i]->magick);
 734     for (j=(ssize_t) strlen(coder_info[i]->magick); j <= 11; j++)
 735       (void) FormatLocaleFile(file," ");
 736     if (coder_info[i]->name != (char *) NULL)
 737       (void) FormatLocaleFile(file,"%s",coder_info[i]->name);
 738     (void) FormatLocaleFile(file,"\n");
 739   }
 740   coder_info=(const CoderInfo **) RelinquishMagickMemory((void *) coder_info);
 741   (void) fflush(file);
 742   return(MagickTrue);
 743 }
 744 \f
 745 /*
 746 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 747 %                                                                             %
 748 %                                                                             %
 749 %                                                                             %
 750 +   L o a d C o d e r L i s t                                                 %
 751 %                                                                             %
 752 %                                                                             %
 753 %                                                                             %
 754 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 755 %
 756 %  LoadCoderCache() loads the coder configurations which provides a
 757 %  mapping between coder attributes and a coder name.
 758 %
 759 %  The format of the LoadCoderCache coder is:
 760 %
 761 %      MagickBooleanType LoadCoderCache(SplayTreeInfo *coder_cache,
 762 %        const char *xml,const char *filename,const size_t depth,
 763 %        ExceptionInfo *exception)
 764 %
 765 %  A description of each parameter follows:
 766 %
 767 %    o xml:  The coder list in XML format.
 768 %
 769 %    o filename:  The coder list filename.
 770 %
 771 %    o depth: depth of <include /> statements.
 772 %
 773 %    o exception: return any errors or warnings in this structure.
 774 %
 775 */
 776 static MagickBooleanType LoadCoderCache(SplayTreeInfo *coder_cache,
 777   const char *xml,const char *filename,const size_t depth,
 778   ExceptionInfo *exception)
 779 {
 780   char
 781     keyword[MaxTextExtent],
 782     *token;
 783
 784   const char
 785     *q;
 786
 787   CoderInfo
 788     *coder_info;
 789
 790   MagickBooleanType
 791     status;
 792
 793   /*
 794     Load the coder map file.
 795   */
 796   (void) LogMagickEvent(ConfigureEvent,GetMagickModule(),
 797     "Loading coder configuration file \"%s\" ...",filename);
 798   if (xml == (const char *) NULL)
 799     return(MagickFalse);
 800   status=MagickTrue;
 801   coder_info=(CoderInfo *) NULL;
 802   token=AcquireString(xml);
 803   for (q=(char *) xml; *q != '\0'; )
 804   {
 805     /*
 806       Interpret XML.
 807     */
 808     GetMagickToken(q,&q,token);
 809     if (*token == '\0')
 810       break;
 811     (void) CopyMagickString(keyword,token,MaxTextExtent);
 812     if (LocaleNCompare(keyword,"<!DOCTYPE",9) == 0)
 813       {
 814         /*
 815           Doctype element.
 816         */
 817         while ((LocaleNCompare(q,"]>",2) != 0) && (*q != '\0'))
 818           GetMagickToken(q,&q,token);
 819         continue;
 820       }
 821     if (LocaleNCompare(keyword,"<!--",4) == 0)
 822       {
 823         /*
 824           Comment element.
 825         */
 826         while ((LocaleNCompare(q,"->",2) != 0) && (*q != '\0'))
 827           GetMagickToken(q,&q,token);
 828         continue;
 829       }
 830     if (LocaleCompare(keyword,"<include") == 0)
 831       {
 832         /*
 833           Include element.
 834         */
 835         while (((*token != '/') && (*(token+1) != '>')) && (*q != '\0'))
 836         {
 837           (void) CopyMagickString(keyword,token,MaxTextExtent);
 838           GetMagickToken(q,&q,token);
 839           if (*token != '=')
 840             continue;
 841           GetMagickToken(q,&q,token);
 842           if (LocaleCompare(keyword,"file") == 0)
 843             {
 844               if (depth > 200)
 845                 (void) ThrowMagickException(exception,GetMagickModule(),
 846                   ConfigureError,"IncludeNodeNestedTooDeeply","`%s'",token);
 847               else
 848                 {
 849                   char
 850                     path[MaxTextExtent],
 851                     *xml;
 852
 853                   GetPathComponent(filename,HeadPath,path);
 854                   if (*path != '\0')
 855                     (void) ConcatenateMagickString(path,DirectorySeparator,
 856                       MaxTextExtent);
 857                   if (*token == *DirectorySeparator)
 858                     (void) CopyMagickString(path,token,MaxTextExtent);
 859                   else
 860                     (void) ConcatenateMagickString(path,token,MaxTextExtent);
 861                   xml=FileToXML(path,~0UL);
 862                   if (xml != (char *) NULL)
 863                     {
 864                       status&=LoadCoderCache(coder_cache,xml,path,depth+1,
 865                         exception);
 866                       xml=(char *) RelinquishMagickMemory(xml);
 867                     }
 868                 }
 869             }
 870         }
 871         continue;
 872       }
 873     if (LocaleCompare(keyword,"<coder") == 0)
 874       {
 875         /*
 876           Coder element.
 877         */
 878         coder_info=(CoderInfo *) AcquireMagickMemory(sizeof(*coder_info));
 879         if (coder_info == (CoderInfo *) NULL)
 880           ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
 881         (void) ResetMagickMemory(coder_info,0,sizeof(*coder_info));
 882         coder_info->path=ConstantString(filename);
 883         coder_info->exempt=MagickFalse;
 884         coder_info->signature=MagickSignature;
 885         continue;
 886       }
 887     if (coder_info == (CoderInfo *) NULL)
 888       continue;
 889     if (LocaleCompare(keyword,"/>") == 0)
 890       {
 891         status=AddValueToSplayTree(coder_cache,ConstantString(
 892           coder_info->magick),coder_info);
 893         if (status == MagickFalse)
 894           (void) ThrowMagickException(exception,GetMagickModule(),
 895             ResourceLimitError,"MemoryAllocationFailed","`%s'",
 896             coder_info->magick);
 897         coder_info=(CoderInfo *) NULL;
 898         continue;
 899       }
 900     GetMagickToken(q,(const char **) NULL,token);
 901     if (*token != '=')
 902       continue;
 903     GetMagickToken(q,&q,token);
 904     GetMagickToken(q,&q,token);
 905     switch (*keyword)
 906     {
 907       case 'M':
 908       case 'm':
 909       {
 910         if (LocaleCompare((char *) keyword,"magick") == 0)
 911           {
 912             coder_info->magick=ConstantString(token);
 913             break;
 914           }
 915         break;
 916       }
 917       case 'N':
 918       case 'n':
 919       {
 920         if (LocaleCompare((char *) keyword,"name") == 0)
 921           {
 922             coder_info->name=ConstantString(token);
 923             break;
 924           }
 925         break;
 926       }
 927       case 'S':
 928       case 's':
 929       {
 930         if (LocaleCompare((char *) keyword,"stealth") == 0)
 931           {
 932             coder_info->stealth=IsStringTrue(token);
 933             break;
 934           }
 935         break;
 936       }
 937       default:
 938         break;
 939     }
 940   }
 941   token=(char *) RelinquishMagickMemory(token);
 942   return(status);
 943 }