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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                    M   M   AAA    GGGG  IIIII   CCCC                        %
   7 %                    MM MM  A   A  G        I    C                            %
   8 %                    M M M  AAAAA  G GGG    I    C                            %
   9 %                    M   M  A   A  G   G    I    C                            %
  10 %                    M   M  A   A   GGGG  IIIII   CCCC                        %
  11 %                                                                             %
  12 %                                                                             %
  13 %                      MagickCore Image Magic Methods                         %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                              Bob Friesenhahn                                %
  17 %                                 July 2000                                   %
  18 %                                                                             %
  19 %                                                                             %
  20 %  Copyright 1999-2012 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/configure.h"
  46 #include "MagickCore/configure-private.h"
  47 #include "MagickCore/exception.h"
  48 #include "MagickCore/exception-private.h"
  49 #include "MagickCore/hashmap.h"
  50 #include "MagickCore/magic.h"
  51 #include "MagickCore/magic-private.h"
  52 #include "MagickCore/memory_.h"
  53 #include "MagickCore/semaphore.h"
  54 #include "MagickCore/string_.h"
  55 #include "MagickCore/string-private.h"
  56 #include "MagickCore/token.h"
  57 #include "MagickCore/utility.h"
  58 #include "MagickCore/utility-private.h"
  59 #include "MagickCore/xml-tree.h"
  60 \f
  61 /*
  62   Define declarations.
  63 */
  64 #define MagicFilename  "magic.xml"
  65 #define MagickString(magic)  (const unsigned char *) (magic), sizeof(magic)-1
  66 \f
  67 /*
  68   Typedef declarations.
  69 */
  70 typedef struct _MagicMapInfo
  71 {
  72   const char
  73     *name;
  74
  75   const MagickOffsetType
  76     offset;
  77
  78   const unsigned char
  79     *magic;
  80
  81   const size_t
  82     length;
  83 } MagicMapInfo;
  84 \f
  85 /*
  86   Static declarations.
  87 */
  88 static const MagicMapInfo
  89   MagicMap[] =
  90   {
  91     { "8BIMWTEXT", 0, MagickString("8\000B\000I\000M\000#") },
  92     { "8BIMTEXT", 0, MagickString("8BIM#") },
  93     { "8BIM", 0, MagickString("8BIM") },
  94     { "BMP", 0, MagickString("BA") },
  95     { "BMP", 0, MagickString("BM") },
  96     { "BMP", 0, MagickString("CI") },
  97     { "BMP", 0, MagickString("CP") },
  98     { "BMP", 0, MagickString("IC") },
  99     { "BMP", 0, MagickString("PI") },
 100     { "CALS", 21, MagickString("version: MIL-STD-1840") },
 101     { "CALS", 0, MagickString("srcdocid:") },
 102     { "CALS", 9, MagickString("srcdocid:") },
 103     { "CALS", 8, MagickString("rorient:") },
 104     { "CGM", 0, MagickString("BEGMF") },
 105     { "CIN", 0, MagickString("\200\052\137\327") },
 106     { "CRW", 0, MagickString("II\x1a\x00\x00\x00HEAPCCDR") },
 107     { "DCM", 128, MagickString("DICM") },
 108     { "DCX", 0, MagickString("\261\150\336\72") },
 109     { "DIB", 0, MagickString("\050\000") },
 110     { "DDS", 0, MagickString("DDS ") },
 111     { "DJVU", 0, MagickString("AT&TFORM") },
 112     { "DOT", 0, MagickString("digraph") },
 113     { "DPX", 0, MagickString("SDPX") },
 114     { "DPX", 0, MagickString("XPDS") },
 115     { "EMF", 40, MagickString("\040\105\115\106\000\000\001\000") },
 116     { "EPT", 0, MagickString("\305\320\323\306") },
 117     { "EXR", 0, MagickString("\166\057\061\001") },
 118     { "FAX", 0, MagickString("DFAX") },
 119     { "FIG", 0, MagickString("#FIG") },
 120     { "FITS", 0, MagickString("IT0") },
 121     { "FITS", 0, MagickString("SIMPLE") },
 122     { "FPX", 0, MagickString("\320\317\021\340") },
 123     { "GIF", 0, MagickString("GIF8") },
 124     { "GPLT", 0, MagickString("#!/usr/local/bin/gnuplot") },
 125     { "HDF", 1, MagickString("HDF") },
 126     { "HDR", 0, MagickString("#?RADIANCE") },
 127     { "HDR", 0, MagickString("#?RGBE") },
 128     { "HPGL", 0, MagickString("IN;") },
 129     { "HTML", 1, MagickString("HTML") },
 130     { "HTML", 1, MagickString("html") },
 131     { "ILBM", 8, MagickString("ILBM") },
 132     { "IPTCWTEXT", 0, MagickString("\062\000#\000\060\000=\000\042\000&\000#\000\060\000;\000&\000#\000\062\000;\000\042\000") },
 133     { "IPTCTEXT", 0, MagickString("2#0=\042&#0;&#2;\042") },
 134     { "IPTC", 0, MagickString("\034\002") },
 135     { "JNG", 0, MagickString("\213JNG\r\n\032\n") },
 136     { "JPEG", 0, MagickString("\377\330\377") },
 137     { "JPC", 0, MagickString("\377\117") },
 138     { "JP2", 4, MagickString("\152\120\040\040\015") },
 139     { "MAT", 0, MagickString("MATLAB 5.0 MAT-file,") },
 140     { "MIFF", 0, MagickString("Id=ImageMagick") },
 141     { "MIFF", 0, MagickString("id=ImageMagick") },
 142     { "MNG", 0, MagickString("\212MNG\r\n\032\n") },
 143     { "MPC", 0, MagickString("id=MagickCache") },
 144     { "MPEG", 0, MagickString("\000\000\001\263") },
 145     { "MRW", 0, MagickString("\x00MRM") },
 146     { "MVG", 0, MagickString("push graphic-context") },
 147     { "ORF", 0, MagickString("IIRO\x08\x00\x00\x00") },
 148     { "PCD", 2048, MagickString("PCD_") },
 149     { "PCL", 0, MagickString("\033E\033") },
 150     { "PCX", 0, MagickString("\012\002") },
 151     { "PCX", 0, MagickString("\012\005") },
 152     { "PDB", 60, MagickString("vIMGView") },
 153     { "PDF", 0, MagickString("%PDF-") },
 154     { "PES", 0, MagickString("#PES") },
 155     { "PFA", 0, MagickString("%!PS-AdobeFont-1.0") },
 156     { "PFB", 6, MagickString("%!PS-AdobeFont-1.0") },
 157     { "PGX", 0, MagickString("\050\107\020\115\046") },
 158     { "PICT", 522, MagickString("\000\021\002\377\014\000") },
 159     { "PNG", 0, MagickString("\211PNG\r\n\032\n") },
 160     { "PBM", 0, MagickString("P1") },
 161     { "PGM", 0, MagickString("P2") },
 162     { "PPM", 0, MagickString("P3") },
 163     { "PBM", 0, MagickString("P4") },
 164     { "PGM", 0, MagickString("P5") },
 165     { "PPM", 0, MagickString("P6") },
 166     { "PAM", 0, MagickString("P7") },
 167     { "PFM", 0, MagickString("PF") },
 168     { "PFM", 0, MagickString("Pf") },
 169     { "PS", 0, MagickString("%!") },
 170     { "PS", 0, MagickString("\004%!") },
 171     { "PS", 0, MagickString("\305\320\323\306") },
 172     { "PSB", 0, MagickString("8BPB") },
 173     { "PSD", 0, MagickString("8BPS") },
 174     { "PWP", 0, MagickString("SFW95") },
 175     { "RAF", 0, MagickString("FUJIFILMCCD-RAW ") },
 176     { "RLE", 0, MagickString("\122\314") },
 177     { "SCT", 0, MagickString("CT") },
 178     { "SFW", 0, MagickString("SFW94") },
 179     { "SGI", 0, MagickString("\001\332") },
 180     { "SUN", 0, MagickString("\131\246\152\225") },
 181     { "SVG", 1, MagickString("?XML") },
 182     { "SVG", 1, MagickString("?xml") },
 183     { "TIFF", 0, MagickString("\115\115\000\052") },
 184     { "TIFF", 0, MagickString("\111\111\052\000") },
 185     { "TIFF64", 0, MagickString("\115\115\000\053\000\010\000\000") },
 186     { "TIFF64", 0, MagickString("\111\111\053\000\010\000\000\000") },
 187     { "TXT", 0, MagickString("# ImageMagick pixel enumeration:") },
 188     { "VICAR", 0, MagickString("LBLSIZE") },
 189     { "VICAR", 0, MagickString("NJPL1I") },
 190     { "VIFF", 0, MagickString("\253\001") },
 191     { "WEBP", 8, MagickString("WEBP") },
 192     { "WMF", 0, MagickString("\327\315\306\232") },
 193     { "WMF", 0, MagickString("\001\000\011\000") },
 194     { "WPG", 0, MagickString("\377WPC") },
 195     { "XBM", 0, MagickString("#define") },
 196     { "XCF", 0, MagickString("gimp xcf") },
 197     { "XEF", 0, MagickString("FOVb") },
 198     { "XPM", 1, MagickString("* XPM *") },
 199     { "XWD", 4, MagickString("\007\000\000") },
 200     { "XWD", 5, MagickString("\000\000\007") }
 201  };
 202
 203 static LinkedListInfo
 204   *magic_list = (LinkedListInfo *) NULL;
 205
 206 static SemaphoreInfo
 207   *magic_semaphore = (SemaphoreInfo *) NULL;
 208
 209 static volatile MagickBooleanType
 210   instantiate_magic = MagickFalse;
 211 \f
 212 /*
 213   Forward declarations.
 214 */
 215 static MagickBooleanType
 216   InitializeMagicList(ExceptionInfo *),
 217   LoadMagicLists(const char *,ExceptionInfo *);
 218 \f
 219 /*
 220 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 221 %                                                                             %
 222 %                                                                             %
 223 %                                                                             %
 224 +   G e t M a g i c I n f o                                                   %
 225 %                                                                             %
 226 %                                                                             %
 227 %                                                                             %
 228 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 229 %
 230 %  GetMagicInfo() searches the magic list for the specified name and if found
 231 %  returns attributes for that magic.
 232 %
 233 %  The format of the GetMagicInfo method is:
 234 %
 235 %      const MagicInfo *GetMagicInfo(const unsigned char *magic,
 236 %        const size_t length,ExceptionInfo *exception)
 237 %
 238 %  A description of each parameter follows:
 239 %
 240 %    o magic: A binary string generally representing the first few characters
 241 %      of the image file or blob.
 242 %
 243 %    o length: the length of the binary signature.
 244 %
 245 %    o exception: return any errors or warnings in this structure.
 246 %
 247 */
 248 MagickExport const MagicInfo *GetMagicInfo(const unsigned char *magic,
 249   const size_t length,ExceptionInfo *exception)
 250 {
 251   register const MagicInfo
 252     *p;
 253
 254   assert(exception != (ExceptionInfo *) NULL);
 255   if ((magic_list == (LinkedListInfo *) NULL) ||
 256       (instantiate_magic == MagickFalse))
 257     if (InitializeMagicList(exception) == MagickFalse)
 258       return((const MagicInfo *) NULL);
 259   if ((magic_list == (LinkedListInfo *) NULL) ||
 260       (IsLinkedListEmpty(magic_list) != MagickFalse))
 261     return((const MagicInfo *) NULL);
 262   if (magic == (const unsigned char *) NULL)
 263     return((const MagicInfo *) GetValueFromLinkedList(magic_list,0));
 264   if (length == 0)
 265     return((const MagicInfo *) NULL);
 266   /*
 267     Search for magic tag.
 268   */
 269   LockSemaphoreInfo(magic_semaphore);
 270   ResetLinkedListIterator(magic_list);
 271   p=(const MagicInfo *) GetNextValueInLinkedList(magic_list);
 272   while (p != (const MagicInfo *) NULL)
 273   {
 274     assert(p->offset >= 0);
 275     if (((size_t) (p->offset+p->length) <= length) &&
 276         (memcmp(magic+p->offset,p->magic,p->length) == 0))
 277       break;
 278     p=(const MagicInfo *) GetNextValueInLinkedList(magic_list);
 279   }
 280   if (p != (const MagicInfo *) NULL)
 281     (void) InsertValueInLinkedList(magic_list,0,
 282       RemoveElementByValueFromLinkedList(magic_list,p));
 283   UnlockSemaphoreInfo(magic_semaphore);
 284   return(p);
 285 }
 286 \f
 287 /*
 288 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 289 %                                                                             %
 290 %                                                                             %
 291 %                                                                             %
 292 %   G e t M a g i c I n f o L i s t                                           %
 293 %                                                                             %
 294 %                                                                             %
 295 %                                                                             %
 296 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 297 %
 298 %  GetMagicInfoList() returns any image aliases that match the specified
 299 %  pattern.
 300 %
 301 %  The magic of the GetMagicInfoList function is:
 302 %
 303 %      const MagicInfo **GetMagicInfoList(const char *pattern,
 304 %        size_t *number_aliases,ExceptionInfo *exception)
 305 %
 306 %  A description of each parameter follows:
 307 %
 308 %    o pattern: Specifies a pointer to a text string containing a pattern.
 309 %
 310 %    o number_aliases:  This integer returns the number of aliases in the list.
 311 %
 312 %    o exception: return any errors or warnings in this structure.
 313 %
 314 */
 315
 316 #if defined(__cplusplus) || defined(c_plusplus)
 317 extern "C" {
 318 #endif
 319
 320 static int MagicInfoCompare(const void *x,const void *y)
 321 {
 322   const MagicInfo
 323     **p,
 324     **q;
 325
 326   p=(const MagicInfo **) x,
 327   q=(const MagicInfo **) y;
 328   if (LocaleCompare((*p)->path,(*q)->path) == 0)
 329     return(LocaleCompare((*p)->name,(*q)->name));
 330   return(LocaleCompare((*p)->path,(*q)->path));
 331 }
 332
 333 #if defined(__cplusplus) || defined(c_plusplus)
 334 }
 335 #endif
 336
 337 MagickExport const MagicInfo **GetMagicInfoList(const char *pattern,
 338   size_t *number_aliases,ExceptionInfo *exception)
 339 {
 340   const MagicInfo
 341     **aliases;
 342
 343   register const MagicInfo
 344     *p;
 345
 346   register ssize_t
 347     i;
 348
 349   /*
 350     Allocate magic list.
 351   */
 352   assert(pattern != (char *) NULL);
 353   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",pattern);
 354   assert(number_aliases != (size_t *) NULL);
 355   *number_aliases=0;
 356   p=GetMagicInfo((const unsigned char *) NULL,0,exception);
 357   if (p == (const MagicInfo *) NULL)
 358     return((const MagicInfo **) NULL);
 359   aliases=(const MagicInfo **) AcquireQuantumMemory((size_t)
 360     GetNumberOfElementsInLinkedList(magic_list)+1UL,sizeof(*aliases));
 361   if (aliases == (const MagicInfo **) NULL)
 362     return((const MagicInfo **) NULL);
 363   /*
 364     Generate magic list.
 365   */
 366   LockSemaphoreInfo(magic_semaphore);
 367   ResetLinkedListIterator(magic_list);
 368   p=(const MagicInfo *) GetNextValueInLinkedList(magic_list);
 369   for (i=0; p != (const MagicInfo *) NULL; )
 370   {
 371     if ((p->stealth == MagickFalse) &&
 372         (GlobExpression(p->name,pattern,MagickFalse) != MagickFalse))
 373       aliases[i++]=p;
 374     p=(const MagicInfo *) GetNextValueInLinkedList(magic_list);
 375   }
 376   UnlockSemaphoreInfo(magic_semaphore);
 377   qsort((void *) aliases,(size_t) i,sizeof(*aliases),MagicInfoCompare);
 378   aliases[i]=(MagicInfo *) NULL;
 379   *number_aliases=(size_t) i;
 380   return(aliases);
 381 }
 382 \f
 383 /*
 384 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 385 %                                                                             %
 386 %                                                                             %
 387 %                                                                             %
 388 %   G e t M a g i c L i s t                                                   %
 389 %                                                                             %
 390 %                                                                             %
 391 %                                                                             %
 392 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 393 %
 394 %  GetMagicList() returns any image format aliases that match the specified
 395 %  pattern.
 396 %
 397 %  The format of the GetMagicList function is:
 398 %
 399 %      char **GetMagicList(const char *pattern,size_t *number_aliases,
 400 %        ExceptionInfo *exception)
 401 %
 402 %  A description of each parameter follows:
 403 %
 404 %    o pattern: Specifies a pointer to a text string containing a pattern.
 405 %
 406 %    o number_aliases:  This integer returns the number of image format aliases
 407 %      in the list.
 408 %
 409 %    o exception: return any errors or warnings in this structure.
 410 %
 411 */
 412
 413 #if defined(__cplusplus) || defined(c_plusplus)
 414 extern "C" {
 415 #endif
 416
 417 static int MagicCompare(const void *x,const void *y)
 418 {
 419   register const char
 420     *p,
 421     *q;
 422
 423   p=(const char *) x;
 424   q=(const char *) y;
 425   return(LocaleCompare(p,q));
 426 }
 427
 428 #if defined(__cplusplus) || defined(c_plusplus)
 429 }
 430 #endif
 431
 432 MagickExport char **GetMagicList(const char *pattern,
 433   size_t *number_aliases,ExceptionInfo *exception)
 434 {
 435   char
 436     **aliases;
 437
 438   register const MagicInfo
 439     *p;
 440
 441   register ssize_t
 442     i;
 443
 444   /*
 445     Allocate configure list.
 446   */
 447   assert(pattern != (char *) NULL);
 448   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",pattern);
 449   assert(number_aliases != (size_t *) NULL);
 450   *number_aliases=0;
 451   p=GetMagicInfo((const unsigned char *) NULL,0,exception);
 452   if (p == (const MagicInfo *) NULL)
 453     return((char **) NULL);
 454   aliases=(char **) AcquireQuantumMemory((size_t)
 455     GetNumberOfElementsInLinkedList(magic_list)+1UL,sizeof(*aliases));
 456   if (aliases == (char **) NULL)
 457     return((char **) NULL);
 458   LockSemaphoreInfo(magic_semaphore);
 459   ResetLinkedListIterator(magic_list);
 460   p=(const MagicInfo *) GetNextValueInLinkedList(magic_list);
 461   for (i=0; p != (const MagicInfo *) NULL; )
 462   {
 463     if ((p->stealth == MagickFalse) &&
 464         (GlobExpression(p->name,pattern,MagickFalse) != MagickFalse))
 465       aliases[i++]=ConstantString(p->name);
 466     p=(const MagicInfo *) GetNextValueInLinkedList(magic_list);
 467   }
 468   UnlockSemaphoreInfo(magic_semaphore);
 469   qsort((void *) aliases,(size_t) i,sizeof(*aliases),MagicCompare);
 470   aliases[i]=(char *) NULL;
 471   *number_aliases=(size_t) i;
 472   return(aliases);
 473 }
 474 \f
 475 /*
 476 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 477 %                                                                             %
 478 %                                                                             %
 479 %                                                                             %
 480 %   G e t M a g i c N a m e                                                   %
 481 %                                                                             %
 482 %                                                                             %
 483 %                                                                             %
 484 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 485 %
 486 %  GetMagicName() returns the name associated with the magic.
 487 %
 488 %  The format of the GetMagicName method is:
 489 %
 490 %      const char *GetMagicName(const MagicInfo *magic_info)
 491 %
 492 %  A description of each parameter follows:
 493 %
 494 %    o magic_info:  The magic info.
 495 %
 496 */
 497 MagickExport const char *GetMagicName(const MagicInfo *magic_info)
 498 {
 499   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
 500   assert(magic_info != (MagicInfo *) NULL);
 501   assert(magic_info->signature == MagickSignature);
 502   return(magic_info->name);
 503 }
 504 \f
 505 /*
 506 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 507 %                                                                             %
 508 %                                                                             %
 509 %                                                                             %
 510 +   I n i t i a l i z e M a g i c L i s t                                     %
 511 %                                                                             %
 512 %                                                                             %
 513 %                                                                             %
 514 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 515 %
 516 %  InitializeMagicList() initializes the magic list.
 517 %
 518 %  The format of the InitializeMagicList method is:
 519 %
 520 %      MagickBooleanType InitializeMagicList(ExceptionInfo *exception)
 521 %
 522 %  A description of each parameter follows.
 523 %
 524 %    o exception: return any errors or warnings in this structure.
 525 %
 526 */
 527 static MagickBooleanType InitializeMagicList(ExceptionInfo *exception)
 528 {
 529   if ((magic_list == (LinkedListInfo *) NULL) &&
 530       (instantiate_magic == MagickFalse))
 531     {
 532       if (magic_semaphore == (SemaphoreInfo *) NULL)
 533         AcquireSemaphoreInfo(&magic_semaphore);
 534       LockSemaphoreInfo(magic_semaphore);
 535       if ((magic_list == (LinkedListInfo *) NULL) &&
 536           (instantiate_magic == MagickFalse))
 537         {
 538           (void) LoadMagicLists(MagicFilename,exception);
 539           instantiate_magic=MagickTrue;
 540         }
 541       UnlockSemaphoreInfo(magic_semaphore);
 542     }
 543   return(magic_list != (LinkedListInfo *) NULL ? MagickTrue : MagickFalse);
 544 }
 545 \f
 546 /*
 547 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 548 %                                                                             %
 549 %                                                                             %
 550 %                                                                             %
 551 %  L i s t M a g i c I n f o                                                  %
 552 %                                                                             %
 553 %                                                                             %
 554 %                                                                             %
 555 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 556 %
 557 %  ListMagicInfo() lists the magic info to a file.
 558 %
 559 %  The format of the ListMagicInfo method is:
 560 %
 561 %      MagickBooleanType ListMagicInfo(FILE *file,ExceptionInfo *exception)
 562 %
 563 %  A description of each parameter follows.
 564 %
 565 %    o file:  An pointer to a FILE.
 566 %
 567 %    o exception: return any errors or warnings in this structure.
 568 %
 569 */
 570 MagickExport MagickBooleanType ListMagicInfo(FILE *file,
 571   ExceptionInfo *exception)
 572 {
 573   const char
 574     *path;
 575
 576   const MagicInfo
 577     **magic_info;
 578
 579   register ssize_t
 580     i;
 581
 582   size_t
 583     number_aliases;
 584
 585   ssize_t
 586     j;
 587
 588   if (file == (const FILE *) NULL)
 589     file=stdout;
 590   magic_info=GetMagicInfoList("*",&number_aliases,exception);
 591   if (magic_info == (const MagicInfo **) NULL)
 592     return(MagickFalse);
 593   j=0;
 594   path=(const char *) NULL;
 595   for (i=0; i < (ssize_t) number_aliases; i++)
 596   {
 597     if (magic_info[i]->stealth != MagickFalse)
 598       continue;
 599     if ((path == (const char *) NULL) ||
 600         (LocaleCompare(path,magic_info[i]->path) != 0))
 601       {
 602         if (magic_info[i]->path != (char *) NULL)
 603           (void) FormatLocaleFile(file,"\nPath: %s\n\n",magic_info[i]->path);
 604         (void) FormatLocaleFile(file,"Name      Offset Target\n");
 605         (void) FormatLocaleFile(file,
 606           "-------------------------------------------------"
 607           "------------------------------\n");
 608       }
 609     path=magic_info[i]->path;
 610     (void) FormatLocaleFile(file,"%s",magic_info[i]->name);
 611     for (j=(ssize_t) strlen(magic_info[i]->name); j <= 9; j++)
 612       (void) FormatLocaleFile(file," ");
 613     (void) FormatLocaleFile(file,"%6ld ",(long) magic_info[i]->offset);
 614     if (magic_info[i]->target != (char *) NULL)
 615       {
 616         register ssize_t
 617           j;
 618
 619         for (j=0; magic_info[i]->target[j] != '\0'; j++)
 620           if (isprint((int) ((unsigned char) magic_info[i]->target[j])) != 0)
 621             (void) FormatLocaleFile(file,"%c",magic_info[i]->target[j]);
 622           else
 623             (void) FormatLocaleFile(file,"\\%03o",(unsigned int)
 624               ((unsigned char) magic_info[i]->target[j]));
 625       }
 626     (void) FormatLocaleFile(file,"\n");
 627   }
 628   (void) fflush(file);
 629   magic_info=(const MagicInfo **) RelinquishMagickMemory((void *) magic_info);
 630   return(MagickTrue);
 631 }
 632 \f
 633 /*
 634 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 635 %                                                                             %
 636 %                                                                             %
 637 %                                                                             %
 638 +   L o a d M a g i c L i s t                                                 %
 639 %                                                                             %
 640 %                                                                             %
 641 %                                                                             %
 642 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 643 %
 644 %  LoadMagicList() loads the magic configuration file which provides a mapping
 645 %  between magic attributes and a magic name.
 646 %
 647 %  The format of the LoadMagicList method is:
 648 %
 649 %      MagickBooleanType LoadMagicList(const char *xml,const char *filename,
 650 %        const size_t depth,ExceptionInfo *exception)
 651 %
 652 %  A description of each parameter follows:
 653 %
 654 %    o xml: The magic list in XML format.
 655 %
 656 %    o filename: The magic list filename.
 657 %
 658 %    o depth: depth of <include /> statements.
 659 %
 660 %    o exception: return any errors or warnings in this structure.
 661 %
 662 */
 663 static MagickBooleanType LoadMagicList(const char *xml,const char *filename,
 664   const size_t depth,ExceptionInfo *exception)
 665 {
 666   char
 667     keyword[MaxTextExtent],
 668     *token;
 669
 670   const char
 671     *q;
 672
 673   MagickBooleanType
 674     status;
 675
 676   MagicInfo
 677     *magic_info;
 678
 679   /*
 680     Load the magic map file.
 681   */
 682   (void) LogMagickEvent(ConfigureEvent,GetMagickModule(),
 683     "Loading magic configure file \"%s\" ...",filename);
 684   if (xml == (char *) NULL)
 685     return(MagickFalse);
 686   if (magic_list == (LinkedListInfo *) NULL)
 687     {
 688       magic_list=NewLinkedList(0);
 689       if (magic_list == (LinkedListInfo *) NULL)
 690         {
 691           ThrowFileException(exception,ResourceLimitError,
 692             "MemoryAllocationFailed",filename);
 693           return(MagickFalse);
 694         }
 695     }
 696   status=MagickTrue;
 697   magic_info=(MagicInfo *) NULL;
 698   token=AcquireString(xml);
 699   for (q=(char *) xml; *q != '\0'; )
 700   {
 701     /*
 702       Interpret XML.
 703     */
 704     GetMagickToken(q,&q,token);
 705     if (*token == '\0')
 706       break;
 707     (void) CopyMagickString(keyword,token,MaxTextExtent);
 708     if (LocaleNCompare(keyword,"<!DOCTYPE",9) == 0)
 709       {
 710         /*
 711           Doctype element.
 712         */
 713         while ((LocaleNCompare(q,"]>",2) != 0) && (*q != '\0'))
 714           GetMagickToken(q,&q,token);
 715         continue;
 716       }
 717     if (LocaleNCompare(keyword,"<!--",4) == 0)
 718       {
 719         /*
 720           Comment element.
 721         */
 722         while ((LocaleNCompare(q,"->",2) != 0) && (*q != '\0'))
 723           GetMagickToken(q,&q,token);
 724         continue;
 725       }
 726     if (LocaleCompare(keyword,"<include") == 0)
 727       {
 728         /*
 729           Include element.
 730         */
 731         while (((*token != '/') && (*(token+1) != '>')) && (*q != '\0'))
 732         {
 733           (void) CopyMagickString(keyword,token,MaxTextExtent);
 734           GetMagickToken(q,&q,token);
 735           if (*token != '=')
 736             continue;
 737           GetMagickToken(q,&q,token);
 738           if (LocaleCompare(keyword,"file") == 0)
 739             {
 740               if (depth > 200)
 741                 (void) ThrowMagickException(exception,GetMagickModule(),
 742                   ConfigureError,"IncludeElementNestedTooDeeply","'%s'",token);
 743               else
 744                 {
 745                   char
 746                     path[MaxTextExtent],
 747                     *xml;
 748
 749                   GetPathComponent(filename,HeadPath,path);
 750                   if (*path != '\0')
 751                     (void) ConcatenateMagickString(path,DirectorySeparator,
 752                       MaxTextExtent);
 753                   if (*token == *DirectorySeparator)
 754                     (void) CopyMagickString(path,token,MaxTextExtent);
 755                   else
 756                     (void) ConcatenateMagickString(path,token,MaxTextExtent);
 757                   xml=FileToString(path,~0,exception);
 758                   if (xml != (char *) NULL)
 759                     {
 760                       status=LoadMagicList(xml,path,depth+1,exception);
 761                       xml=(char *) RelinquishMagickMemory(xml);
 762                     }
 763                 }
 764             }
 765         }
 766         continue;
 767       }
 768     if (LocaleCompare(keyword,"<magic") == 0)
 769       {
 770         /*
 771           Magic element.
 772         */
 773         magic_info=(MagicInfo *) AcquireMagickMemory(sizeof(*magic_info));
 774         if (magic_info == (MagicInfo *) NULL)
 775           ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
 776         (void) ResetMagickMemory(magic_info,0,sizeof(*magic_info));
 777         magic_info->path=ConstantString(filename);
 778         magic_info->exempt=MagickFalse;
 779         magic_info->signature=MagickSignature;
 780         continue;
 781       }
 782     if (magic_info == (MagicInfo *) NULL)
 783       continue;
 784     if (LocaleCompare(keyword,"/>") == 0)
 785       {
 786         status=AppendValueToLinkedList(magic_list,magic_info);
 787         if (status == MagickFalse)
 788           (void) ThrowMagickException(exception,GetMagickModule(),
 789             ResourceLimitError,"MemoryAllocationFailed","'%s'",
 790             magic_info->name);
 791         magic_info=(MagicInfo *) NULL;
 792       }
 793     GetMagickToken(q,(const char **) NULL,token);
 794     if (*token != '=')
 795       continue;
 796     GetMagickToken(q,&q,token);
 797     GetMagickToken(q,&q,token);
 798     switch (*keyword)
 799     {
 800       case 'N':
 801       case 'n':
 802       {
 803         if (LocaleCompare((char *) keyword,"name") == 0)
 804           {
 805             magic_info->name=ConstantString(token);
 806             break;
 807           }
 808         break;
 809       }
 810       case 'O':
 811       case 'o':
 812       {
 813         if (LocaleCompare((char *) keyword,"offset") == 0)
 814           {
 815             magic_info->offset=(MagickOffsetType) StringToLong(token);
 816             break;
 817           }
 818         break;
 819       }
 820       case 'S':
 821       case 's':
 822       {
 823         if (LocaleCompare((char *) keyword,"stealth") == 0)
 824           {
 825             magic_info->stealth=IsStringTrue(token);
 826             break;
 827           }
 828         break;
 829       }
 830       case 'T':
 831       case 't':
 832       {
 833         if (LocaleCompare((char *) keyword,"target") == 0)
 834           {
 835             char
 836               *p;
 837
 838             register unsigned char
 839               *q;
 840
 841             size_t
 842               length;
 843
 844             length=strlen(token);
 845             magic_info->target=ConstantString(token);
 846             magic_info->magic=(unsigned char *) ConstantString(token);
 847             q=magic_info->magic;
 848             for (p=magic_info->target; *p != '\0'; )
 849             {
 850               if (*p == '\\')
 851                 {
 852                   p++;
 853                   if (isdigit((int) ((unsigned char) *p)) != 0)
 854                     {
 855                       char
 856                         *end;
 857
 858                       *q++=(unsigned char) strtol(p,&end,8);
 859                       p+=(end-p);
 860                       magic_info->length++;
 861                       continue;
 862                     }
 863                   switch (*p)
 864                   {
 865                     case 'b': *q='\b'; break;
 866                     case 'f': *q='\f'; break;
 867                     case 'n': *q='\n'; break;
 868                     case 'r': *q='\r'; break;
 869                     case 't': *q='\t'; break;
 870                     case 'v': *q='\v'; break;
 871                     case 'a': *q='a'; break;
 872                     case '?': *q='\?'; break;
 873                     default: *q=(unsigned char) (*p); break;
 874                   }
 875                   p++;
 876                   q++;
 877                   magic_info->length++;
 878                   continue;
 879                 }
 880               else
 881                 if (LocaleNCompare(p,"&amp;",5) == 0)
 882                   (void) CopyMagickString(p+1,p+5,length-magic_info->length);
 883               *q++=(unsigned char) (*p++);
 884               magic_info->length++;
 885             }
 886             break;
 887           }
 888         break;
 889       }
 890       default:
 891         break;
 892     }
 893   }
 894   token=(char *) RelinquishMagickMemory(token);
 895   return(status);
 896 }
 897 \f
 898 /*
 899 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 900 %                                                                             %
 901 %                                                                             %
 902 %                                                                             %
 903 %  L o a d M a g i c L i s t s                                                %
 904 %                                                                             %
 905 %                                                                             %
 906 %                                                                             %
 907 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 908 %
 909 %  LoadMagicLists() loads one or more magic configuration file which provides a
 910 %  mapping between magic attributes and a magic name.
 911 %
 912 %  The format of the LoadMagicLists method is:
 913 %
 914 %      MagickBooleanType LoadMagicLists(const char *filename,
 915 %        ExceptionInfo *exception)
 916 %
 917 %  A description of each parameter follows:
 918 %
 919 %    o filename: the font file name.
 920 %
 921 %    o exception: return any errors or warnings in this structure.
 922 %
 923 */
 924 static MagickBooleanType LoadMagicLists(const char *filename,
 925   ExceptionInfo *exception)
 926 {
 927   char
 928     path[MaxTextExtent];
 929
 930   const StringInfo
 931     *option;
 932
 933   LinkedListInfo
 934     *options;
 935
 936   MagickStatusType
 937     status;
 938
 939   register ssize_t
 940     i;
 941
 942   /*
 943     Load built-in magic map.
 944   */
 945   status=MagickFalse;
 946   if (magic_list == (LinkedListInfo *) NULL)
 947     {
 948       magic_list=NewLinkedList(0);
 949       if (magic_list == (LinkedListInfo *) NULL)
 950         {
 951           ThrowFileException(exception,ResourceLimitError,
 952             "MemoryAllocationFailed",filename);
 953           return(MagickFalse);
 954         }
 955     }
 956   for (i=0; i < (ssize_t) (sizeof(MagicMap)/sizeof(*MagicMap)); i++)
 957   {
 958     MagicInfo
 959       *magic_info;
 960
 961     register const MagicMapInfo
 962       *p;
 963
 964     p=MagicMap+i;
 965     magic_info=(MagicInfo *) AcquireMagickMemory(sizeof(*magic_info));
 966     if (magic_info == (MagicInfo *) NULL)
 967       {
 968         (void) ThrowMagickException(exception,GetMagickModule(),
 969           ResourceLimitError,"MemoryAllocationFailed","'%s'",magic_info->name);
 970         continue;
 971       }
 972     (void) ResetMagickMemory(magic_info,0,sizeof(*magic_info));
 973     magic_info->path=(char *) "[built-in]";
 974     magic_info->name=(char *) p->name;
 975     magic_info->offset=p->offset;
 976     magic_info->target=(char *) p->magic;
 977     magic_info->magic=(unsigned char *) p->magic;
 978     magic_info->length=p->length;
 979     magic_info->exempt=MagickTrue;
 980     magic_info->signature=MagickSignature;
 981     status=AppendValueToLinkedList(magic_list,magic_info);
 982     if (status == MagickFalse)
 983       (void) ThrowMagickException(exception,GetMagickModule(),
 984         ResourceLimitError,"MemoryAllocationFailed","'%s'",magic_info->name);
 985   }
 986   /*
 987     Load external magic map.
 988   */
 989   *path='\0';
 990   options=GetConfigureOptions(filename,exception);
 991   option=(const StringInfo *) GetNextValueInLinkedList(options);
 992   while (option != (const StringInfo *) NULL)
 993   {
 994     (void) CopyMagickString(path,GetStringInfoPath(option),MaxTextExtent);
 995     status|=LoadMagicList((const char *) GetStringInfoDatum(option),
 996       GetStringInfoPath(option),0,exception);
 997     option=(const StringInfo *) GetNextValueInLinkedList(options);
 998   }
 999   options=DestroyConfigureOptions(options);
1000   return(status != 0 ? MagickTrue : MagickFalse);
1001 }
1002 \f
1003 /*
1004 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1005 %                                                                             %
1006 %                                                                             %
1007 %                                                                             %
1008 +   M a g i c C o m p o n e n t G e n e s i s                                 %
1009 %                                                                             %
1010 %                                                                             %
1011 %                                                                             %
1012 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1013 %
1014 %  MagicComponentGenesis() instantiates the magic component.
1015 %
1016 %  The format of the MagicComponentGenesis method is:
1017 %
1018 %      MagickBooleanType MagicComponentGenesis(void)
1019 %
1020 */
1021 MagickPrivate MagickBooleanType MagicComponentGenesis(void)
1022 {
1023   AcquireSemaphoreInfo(&magic_semaphore);
1024   return(MagickTrue);
1025 }
1026 \f
1027 /*
1028 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1029 %                                                                             %
1030 %                                                                             %
1031 %                                                                             %
1032 +   M a g i c C o m p o n e n t T e r m i n u s                               %
1033 %                                                                             %
1034 %                                                                             %
1035 %                                                                             %
1036 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1037 %
1038 %  MagicComponentTerminus() destroys the magic component.
1039 %
1040 %  The format of the MagicComponentTerminus method is:
1041 %
1042 %      MagicComponentTerminus(void)
1043 %
1044 */
1045
1046 static void *DestroyMagicElement(void *magic_info)
1047 {
1048   register MagicInfo
1049     *p;
1050
1051   p=(MagicInfo *) magic_info;
1052   if (p->exempt == MagickFalse)
1053     {
1054       if (p->path != (char *) NULL)
1055         p->path=DestroyString(p->path);
1056       if (p->name != (char *) NULL)
1057         p->name=DestroyString(p->name);
1058       if (p->target != (char *) NULL)
1059         p->target=DestroyString(p->target);
1060       if (p->magic != (unsigned char *) NULL)
1061         p->magic=(unsigned char *) RelinquishMagickMemory(p->magic);
1062     }
1063   p=(MagicInfo *) RelinquishMagickMemory(p);
1064   return((void *) NULL);
1065 }
1066
1067 MagickPrivate void MagicComponentTerminus(void)
1068 {
1069   if (magic_semaphore == (SemaphoreInfo *) NULL)
1070     AcquireSemaphoreInfo(&magic_semaphore);
1071   LockSemaphoreInfo(magic_semaphore);
1072   if (magic_list != (LinkedListInfo *) NULL)
1073     magic_list=DestroyLinkedList(magic_list,DestroyMagicElement);
1074   instantiate_magic=MagickFalse;
1075   UnlockSemaphoreInfo(magic_semaphore);
1076   DestroySemaphoreInfo(&magic_semaphore);
1077 }