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

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
   4 %                                                                             %
   5 %                                                                             %
   6 %                         BBBB   L       OOO   BBBB                           %
   7 %                         B   B  L      O   O  B   B                          %
   8 %                         BBBB   L      O   O  BBBB                           %
   9 %                         B   B  L      O   O  B   B                          %
  10 %                         BBBB   LLLLL   OOO   BBBB                           %
  11 %                                                                             %
  12 %                                                                             %
  13 %                     MagickCore Binary Large OBjectS Methods                 %
  14 %                                                                             %
  15 %                              Software Design                                %
  16 %                                John Cristy                                  %
  17 %                                 July 1999                                   %
  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 */
  39 \f
  40 /*
  41   Include declarations.
  42 */
  43 #include "MagickCore/studio.h"
  44 #include "MagickCore/nt-base-private.h"
  45 #include "MagickCore/blob.h"
  46 #include "MagickCore/blob-private.h"
  47 #include "MagickCore/cache.h"
  48 #include "MagickCore/client.h"
  49 #include "MagickCore/constitute.h"
  50 #include "MagickCore/delegate.h"
  51 #include "MagickCore/exception.h"
  52 #include "MagickCore/exception-private.h"
  53 #include "MagickCore/image-private.h"
  54 #include "MagickCore/list.h"
  55 #include "MagickCore/locale_.h"
  56 #include "MagickCore/log.h"
  57 #include "MagickCore/magick.h"
  58 #include "MagickCore/memory_.h"
  59 #include "MagickCore/policy.h"
  60 #include "MagickCore/resource_.h"
  61 #include "MagickCore/semaphore.h"
  62 #include "MagickCore/string_.h"
  63 #include "MagickCore/string-private.h"
  64 #include "MagickCore/token.h"
  65 #include "MagickCore/utility.h"
  66 #include "MagickCore/utility-private.h"
  67 #if defined(MAGICKCORE_ZLIB_DELEGATE)
  68 #include "zlib.h"
  69 #endif
  70 #if defined(MAGICKCORE_BZLIB_DELEGATE)
  71 #include "bzlib.h"
  72 #endif
  73 \f
  74 /*
  75   Define declarations.
  76 */
  77 #define MagickMaxBlobExtent  65541
  78 #if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
  79 # define MAP_ANONYMOUS  MAP_ANON
  80 #endif
  81 #if !defined(MAP_FAILED)
  82 #define MAP_FAILED  ((void *) -1)
  83 #endif
  84 #if !defined(MS_SYNC)
  85 #define MS_SYNC  0x04
  86 #endif
  87 #if defined(__OS2__)
  88 #include <io.h>
  89 #define _O_BINARY O_BINARY
  90 #endif
  91 \f
  92 /*
  93   Typedef declarations.
  94 */
  95 typedef union FileInfo
  96 {
  97   FILE
  98     *file;
  99
 100 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 101   gzFile
 102     gzfile;
 103 #endif
 104
 105 #if defined(MAGICKCORE_BZLIB_DELEGATE)
 106   BZFILE
 107     *bzfile;
 108 #endif
 109 } FileInfo;
 110
 111 struct _BlobInfo
 112 {
 113   size_t
 114     length,
 115     extent,
 116     quantum;
 117
 118   MagickBooleanType
 119     mapped,
 120     eof;
 121
 122   MagickOffsetType
 123     offset;
 124
 125   MagickSizeType
 126     size;
 127
 128   MagickBooleanType
 129     exempt,
 130     synchronize,
 131     status,
 132     temporary;
 133
 134   StreamType
 135     type;
 136
 137   FileInfo
 138     file_info;
 139
 140   struct stat
 141     properties;
 142
 143   StreamHandler
 144     stream;
 145
 146   unsigned char
 147     *data;
 148
 149   MagickBooleanType
 150     debug;
 151
 152   SemaphoreInfo
 153     *semaphore;
 154
 155   ssize_t
 156     reference_count;
 157
 158   size_t
 159     signature;
 160 };
 161 \f
 162 /*
 163   Forward declarations.
 164 */
 165 static int
 166   SyncBlob(Image *);
 167 \f
 168 /*
 169 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 170 %                                                                             %
 171 %                                                                             %
 172 %                                                                             %
 173 +   A t t a c h B l o b                                                       %
 174 %                                                                             %
 175 %                                                                             %
 176 %                                                                             %
 177 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 178 %
 179 %  AttachBlob() attaches a blob to the BlobInfo structure.
 180 %
 181 %  The format of the AttachBlob method is:
 182 %
 183 %      void AttachBlob(BlobInfo *blob_info,const void *blob,const size_t length)
 184 %
 185 %  A description of each parameter follows:
 186 %
 187 %    o blob_info: Specifies a pointer to a BlobInfo structure.
 188 %
 189 %    o blob: the address of a character stream in one of the image formats
 190 %      understood by ImageMagick.
 191 %
 192 %    o length: This size_t integer reflects the length in bytes of the blob.
 193 %
 194 */
 195 MagickExport void AttachBlob(BlobInfo *blob_info,const void *blob,
 196   const size_t length)
 197 {
 198   assert(blob_info != (BlobInfo *) NULL);
 199   if (blob_info->debug != MagickFalse)
 200     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
 201   blob_info->length=length;
 202   blob_info->extent=length;
 203   blob_info->quantum=(size_t) MagickMaxBlobExtent;
 204   blob_info->offset=0;
 205   blob_info->type=BlobStream;
 206   blob_info->file_info.file=(FILE *) NULL;
 207   blob_info->data=(unsigned char *) blob;
 208   blob_info->mapped=MagickFalse;
 209 }
 210 \f
 211 /*
 212 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 213 %                                                                             %
 214 %                                                                             %
 215 %                                                                             %
 216 +   B l o b T o F i l e                                                       %
 217 %                                                                             %
 218 %                                                                             %
 219 %                                                                             %
 220 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 221 %
 222 %  BlobToFile() writes a blob to a file.  It returns MagickFalse if an error
 223 %  occurs otherwise MagickTrue.
 224 %
 225 %  The format of the BlobToFile method is:
 226 %
 227 %       MagickBooleanType BlobToFile(char *filename,const void *blob,
 228 %         const size_t length,ExceptionInfo *exception)
 229 %
 230 %  A description of each parameter follows:
 231 %
 232 %    o filename: Write the blob to this file.
 233 %
 234 %    o blob: the address of a blob.
 235 %
 236 %    o length: This length in bytes of the blob.
 237 %
 238 %    o exception: return any errors or warnings in this structure.
 239 %
 240 */
 241
 242 static inline MagickSizeType MagickMin(const MagickSizeType x,
 243   const MagickSizeType y)
 244 {
 245   if (x < y)
 246     return(x);
 247   return(y);
 248 }
 249
 250 MagickExport MagickBooleanType BlobToFile(char *filename,const void *blob,
 251   const size_t length,ExceptionInfo *exception)
 252 {
 253   int
 254     file;
 255
 256   register size_t
 257     i;
 258
 259   ssize_t
 260     count;
 261
 262   assert(filename != (const char *) NULL);
 263   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",filename);
 264   assert(blob != (const void *) NULL);
 265   if (*filename == '\0')
 266     file=AcquireUniqueFileResource(filename);
 267   else
 268     file=open_utf8(filename,O_RDWR | O_CREAT | O_EXCL | O_BINARY,S_MODE);
 269   if (file == -1)
 270     {
 271       ThrowFileException(exception,BlobError,"UnableToWriteBlob",filename);
 272       return(MagickFalse);
 273     }
 274   for (i=0; i < length; i+=count)
 275   {
 276     count=(ssize_t) write(file,(const char *) blob+i,(size_t) MagickMin(length-
 277       i,(MagickSizeType) SSIZE_MAX));
 278     if (count <= 0)
 279       {
 280         count=0;
 281         if (errno != EINTR)
 282           break;
 283       }
 284   }
 285   file=close(file);
 286   if ((file == -1) || (i < length))
 287     {
 288       ThrowFileException(exception,BlobError,"UnableToWriteBlob",filename);
 289       return(MagickFalse);
 290     }
 291   return(MagickTrue);
 292 }
 293 \f
 294 /*
 295 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 296 %                                                                             %
 297 %                                                                             %
 298 %                                                                             %
 299 %   B l o b T o I m a g e                                                     %
 300 %                                                                             %
 301 %                                                                             %
 302 %                                                                             %
 303 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 304 %
 305 %  BlobToImage() implements direct to memory image formats.  It returns the
 306 %  blob as an image.
 307 %
 308 %  The format of the BlobToImage method is:
 309 %
 310 %      Image *BlobToImage(const ImageInfo *image_info,const void *blob,
 311 %        const size_t length,ExceptionInfo *exception)
 312 %
 313 %  A description of each parameter follows:
 314 %
 315 %    o image_info: the image info.
 316 %
 317 %    o blob: the address of a character stream in one of the image formats
 318 %      understood by ImageMagick.
 319 %
 320 %    o length: This size_t integer reflects the length in bytes of the blob.
 321 %
 322 %    o exception: return any errors or warnings in this structure.
 323 %
 324 */
 325 MagickExport Image *BlobToImage(const ImageInfo *image_info,const void *blob,
 326   const size_t length,ExceptionInfo *exception)
 327 {
 328   const MagickInfo
 329     *magick_info;
 330
 331   Image
 332     *image;
 333
 334   ImageInfo
 335     *blob_info,
 336     *clone_info;
 337
 338   MagickBooleanType
 339     status;
 340
 341   assert(image_info != (ImageInfo *) NULL);
 342   assert(image_info->signature == MagickSignature);
 343   if (image_info->debug != MagickFalse)
 344     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 345       image_info->filename);
 346   assert(exception != (ExceptionInfo *) NULL);
 347   if ((blob == (const void *) NULL) || (length == 0))
 348     {
 349       (void) ThrowMagickException(exception,GetMagickModule(),BlobError,
 350         "ZeroLengthBlobNotPermitted","'%s'",image_info->filename);
 351       return((Image *) NULL);
 352     }
 353   blob_info=CloneImageInfo(image_info);
 354   blob_info->blob=(void *) blob;
 355   blob_info->length=length;
 356   if (*blob_info->magick == '\0')
 357     (void) SetImageInfo(blob_info,0,exception);
 358   magick_info=GetMagickInfo(blob_info->magick,exception);
 359   if (magick_info == (const MagickInfo *) NULL)
 360     {
 361       blob_info=DestroyImageInfo(blob_info);
 362       (void) ThrowMagickException(exception,GetMagickModule(),
 363         MissingDelegateError,"NoDecodeDelegateForThisImageFormat","'%s'",
 364         image_info->filename);
 365       return((Image *) NULL);
 366     }
 367   if (GetMagickBlobSupport(magick_info) != MagickFalse)
 368     {
 369       /*
 370         Native blob support for this image format.
 371       */
 372       (void) CopyMagickString(blob_info->filename,image_info->filename,
 373         MaxTextExtent);
 374       (void) CopyMagickString(blob_info->magick,image_info->magick,
 375         MaxTextExtent);
 376       image=ReadImage(blob_info,exception);
 377       if (image != (Image *) NULL)
 378         (void) DetachBlob(image->blob);
 379       blob_info=DestroyImageInfo(blob_info);
 380       return(image);
 381     }
 382   /*
 383     Write blob to a temporary file on disk.
 384   */
 385   blob_info->blob=(void *) NULL;
 386   blob_info->length=0;
 387   *blob_info->filename='\0';
 388   status=BlobToFile(blob_info->filename,blob,length,exception);
 389   if (status == MagickFalse)
 390     {
 391       (void) RelinquishUniqueFileResource(blob_info->filename);
 392       blob_info=DestroyImageInfo(blob_info);
 393       return((Image *) NULL);
 394     }
 395   clone_info=CloneImageInfo(blob_info);
 396   (void) FormatLocaleString(clone_info->filename,MaxTextExtent,"%s:%s",
 397     blob_info->magick,blob_info->filename);
 398   image=ReadImage(clone_info,exception);
 399   if (image != (Image *) NULL)
 400     {
 401       Image
 402         *images;
 403
 404       /*
 405         Restore original filenames.
 406       */
 407       for (images=GetFirstImageInList(image); images != (Image *) NULL; )
 408       {
 409         (void) CopyMagickMemory(images->filename,image_info->filename,
 410           sizeof(images->filename));
 411         (void) CopyMagickMemory(images->magick_filename,image_info->filename,
 412           sizeof(images->magick_filename));
 413         images=GetNextImageInList(images);
 414       }
 415     }
 416   clone_info=DestroyImageInfo(clone_info);
 417   (void) RelinquishUniqueFileResource(blob_info->filename);
 418   blob_info=DestroyImageInfo(blob_info);
 419   return(image);
 420 }
 421 \f
 422 /*
 423 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 424 %                                                                             %
 425 %                                                                             %
 426 %                                                                             %
 427 +   C l o n e B l o b I n f o                                                 %
 428 %                                                                             %
 429 %                                                                             %
 430 %                                                                             %
 431 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 432 %
 433 %  CloneBlobInfo() makes a duplicate of the given blob info structure, or if
 434 %  blob info is NULL, a new one.
 435 %
 436 %  The format of the CloneBlobInfo method is:
 437 %
 438 %      BlobInfo *CloneBlobInfo(const BlobInfo *blob_info)
 439 %
 440 %  A description of each parameter follows:
 441 %
 442 %    o blob_info: the blob info.
 443 %
 444 */
 445 MagickExport BlobInfo *CloneBlobInfo(const BlobInfo *blob_info)
 446 {
 447   BlobInfo
 448     *clone_info;
 449
 450   clone_info=(BlobInfo *) AcquireMagickMemory(sizeof(*clone_info));
 451   if (clone_info == (BlobInfo *) NULL)
 452     ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
 453   GetBlobInfo(clone_info);
 454   if (blob_info == (BlobInfo *) NULL)
 455     return(clone_info);
 456   clone_info->length=blob_info->length;
 457   clone_info->extent=blob_info->extent;
 458   clone_info->synchronize=blob_info->synchronize;
 459   clone_info->quantum=blob_info->quantum;
 460   clone_info->mapped=blob_info->mapped;
 461   clone_info->eof=blob_info->eof;
 462   clone_info->offset=blob_info->offset;
 463   clone_info->size=blob_info->size;
 464   clone_info->exempt=blob_info->exempt;
 465   clone_info->status=blob_info->status;
 466   clone_info->temporary=blob_info->temporary;
 467   clone_info->type=blob_info->type;
 468   clone_info->file_info.file=blob_info->file_info.file;
 469   clone_info->properties=blob_info->properties;
 470   clone_info->stream=blob_info->stream;
 471   clone_info->data=blob_info->data;
 472   clone_info->debug=IsEventLogging();
 473   clone_info->reference_count=1;
 474   return(clone_info);
 475 }
 476 \f
 477 /*
 478 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 479 %                                                                             %
 480 %                                                                             %
 481 %                                                                             %
 482 +   C l o s e B l o b                                                         %
 483 %                                                                             %
 484 %                                                                             %
 485 %                                                                             %
 486 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 487 %
 488 %  CloseBlob() closes a stream associated with the image.
 489 %
 490 %  The format of the CloseBlob method is:
 491 %
 492 %      MagickBooleanType CloseBlob(Image *image)
 493 %
 494 %  A description of each parameter follows:
 495 %
 496 %    o image: the image.
 497 %
 498 */
 499 MagickExport MagickBooleanType CloseBlob(Image *image)
 500 {
 501   int
 502     status;
 503
 504   /*
 505     Close image file.
 506   */
 507   assert(image != (Image *) NULL);
 508   assert(image->signature == MagickSignature);
 509   if (image->debug != MagickFalse)
 510     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 511   assert(image->blob != (BlobInfo *) NULL);
 512   if (image->blob->type == UndefinedStream)
 513     return(MagickTrue);
 514   if (image->blob->synchronize != MagickFalse)
 515     SyncBlob(image);
 516   image->blob->size=GetBlobSize(image);
 517   image->extent=image->blob->size;
 518   image->blob->eof=MagickFalse;
 519   if (image->blob->exempt != MagickFalse)
 520     {
 521       image->blob->type=UndefinedStream;
 522       return(MagickTrue);
 523     }
 524   status=0;
 525   switch (image->blob->type)
 526   {
 527     case UndefinedStream:
 528     case StandardStream:
 529       break;
 530     case FileStream:
 531     case PipeStream:
 532     {
 533       status=ferror(image->blob->file_info.file);
 534       break;
 535     }
 536     case ZipStream:
 537     {
 538 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 539       (void) gzerror(image->blob->file_info.gzfile,&status);
 540 #endif
 541       break;
 542     }
 543     case BZipStream:
 544     {
 545 #if defined(MAGICKCORE_BZLIB_DELEGATE)
 546       (void) BZ2_bzerror(image->blob->file_info.bzfile,&status);
 547 #endif
 548       break;
 549     }
 550     case FifoStream:
 551     case BlobStream:
 552       break;
 553   }
 554   image->blob->status=status < 0 ? MagickTrue : MagickFalse;
 555   switch (image->blob->type)
 556   {
 557     case UndefinedStream:
 558     case StandardStream:
 559       break;
 560     case FileStream:
 561     {
 562       if (image->blob->synchronize != MagickFalse)
 563         {
 564           status=fflush(image->blob->file_info.file);
 565           status=fsync(fileno(image->blob->file_info.file));
 566         }
 567       status=fclose(image->blob->file_info.file);
 568       break;
 569     }
 570     case PipeStream:
 571     {
 572 #if defined(MAGICKCORE_HAVE_PCLOSE)
 573       status=pclose(image->blob->file_info.file);
 574 #endif
 575       break;
 576     }
 577     case ZipStream:
 578     {
 579 #if defined(MAGICKCORE_ZLIB_DELEGATE)
 580       status=gzclose(image->blob->file_info.gzfile);
 581 #endif
 582       break;
 583     }
 584     case BZipStream:
 585     {
 586 #if defined(MAGICKCORE_BZLIB_DELEGATE)
 587       BZ2_bzclose(image->blob->file_info.bzfile);
 588 #endif
 589       break;
 590     }
 591     case FifoStream:
 592       break;
 593     case BlobStream:
 594     {
 595       if (image->blob->file_info.file != (FILE *) NULL)
 596         {
 597           if (image->blob->synchronize != MagickFalse)
 598             (void) fsync(fileno(image->blob->file_info.file));
 599           status=fclose(image->blob->file_info.file);
 600         }
 601       break;
 602     }
 603   }
 604   (void) DetachBlob(image->blob);
 605   image->blob->status=status < 0 ? MagickTrue : MagickFalse;
 606   return(image->blob->status);
 607 }
 608 \f
 609 /*
 610 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 611 %                                                                             %
 612 %                                                                             %
 613 %                                                                             %
 614 +   D e s t r o y B l o b                                                     %
 615 %                                                                             %
 616 %                                                                             %
 617 %                                                                             %
 618 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 619 %
 620 %  DestroyBlob() deallocates memory associated with a blob.
 621 %
 622 %  The format of the DestroyBlob method is:
 623 %
 624 %      void DestroyBlob(Image *image)
 625 %
 626 %  A description of each parameter follows:
 627 %
 628 %    o image: the image.
 629 %
 630 */
 631 MagickExport void DestroyBlob(Image *image)
 632 {
 633   MagickBooleanType
 634     destroy;
 635
 636   assert(image != (Image *) NULL);
 637   assert(image->signature == MagickSignature);
 638   if (image->debug != MagickFalse)
 639     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 640   assert(image->blob != (BlobInfo *) NULL);
 641   assert(image->blob->signature == MagickSignature);
 642   destroy=MagickFalse;
 643   LockSemaphoreInfo(image->blob->semaphore);
 644   image->blob->reference_count--;
 645   assert(image->blob->reference_count >= 0);
 646   if (image->blob->reference_count == 0)
 647     destroy=MagickTrue;
 648   UnlockSemaphoreInfo(image->blob->semaphore);
 649   if (destroy == MagickFalse)
 650     return;
 651   (void) CloseBlob(image);
 652   if (image->blob->mapped != MagickFalse)
 653     (void) UnmapBlob(image->blob->data,image->blob->length);
 654   if (image->blob->semaphore != (SemaphoreInfo *) NULL)
 655     DestroySemaphoreInfo(&image->blob->semaphore);
 656   image->blob->signature=(~MagickSignature);
 657   image->blob=(BlobInfo *) RelinquishMagickMemory(image->blob);
 658 }
 659 \f
 660 /*
 661 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 662 %                                                                             %
 663 %                                                                             %
 664 %                                                                             %
 665 +   D e t a c h B l o b                                                       %
 666 %                                                                             %
 667 %                                                                             %
 668 %                                                                             %
 669 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 670 %
 671 %  DetachBlob() detaches a blob from the BlobInfo structure.
 672 %
 673 %  The format of the DetachBlob method is:
 674 %
 675 %      unsigned char *DetachBlob(BlobInfo *blob_info)
 676 %
 677 %  A description of each parameter follows:
 678 %
 679 %    o blob_info: Specifies a pointer to a BlobInfo structure.
 680 %
 681 */
 682 MagickExport unsigned char *DetachBlob(BlobInfo *blob_info)
 683 {
 684   unsigned char
 685     *data;
 686
 687   assert(blob_info != (BlobInfo *) NULL);
 688   if (blob_info->debug != MagickFalse)
 689     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
 690   if (blob_info->mapped != MagickFalse)
 691     (void) UnmapBlob(blob_info->data,blob_info->length);
 692   blob_info->mapped=MagickFalse;
 693   blob_info->length=0;
 694   blob_info->offset=0;
 695   blob_info->eof=MagickFalse;
 696   blob_info->exempt=MagickFalse;
 697   blob_info->type=UndefinedStream;
 698   blob_info->file_info.file=(FILE *) NULL;
 699   data=blob_info->data;
 700   blob_info->data=(unsigned char *) NULL;
 701   blob_info->stream=(StreamHandler) NULL;
 702   return(data);
 703 }
 704 \f
 705 /*
 706 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 707 %                                                                             %
 708 %                                                                             %
 709 %                                                                             %
 710 +  D i s c a r d B l o b B y t e s                                            %
 711 %                                                                             %
 712 %                                                                             %
 713 %                                                                             %
 714 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 715 %
 716 %  DiscardBlobBytes() discards bytes in a blob.
 717 %
 718 %  The format of the DiscardBlobBytes method is:
 719 %
 720 %      MagickBooleanType DiscardBlobBytes(Image *image,const size_t length)
 721 %
 722 %  A description of each parameter follows.
 723 %
 724 %    o image: the image.
 725 %
 726 %    o length:  the number of bytes to skip.
 727 %
 728 */
 729
 730 static inline const unsigned char *ReadBlobStream(Image *image,
 731   const size_t length,unsigned char *data,ssize_t *count)
 732 {
 733   assert(count != (ssize_t *) NULL);
 734   assert(image->blob != (BlobInfo *) NULL);
 735   if (image->blob->type != BlobStream)
 736     {
 737       *count=ReadBlob(image,length,data);
 738       return(data);
 739     }
 740   if (image->blob->offset >= (MagickOffsetType) image->blob->length)
 741     {
 742       *count=0;
 743       image->blob->eof=MagickTrue;
 744       return(data);
 745     }
 746   data=image->blob->data+image->blob->offset;
 747   *count=(ssize_t) MagickMin(length,(MagickSizeType) (image->blob->length-
 748     image->blob->offset));
 749   image->blob->offset+=(*count);
 750   if (*count != (ssize_t) length)
 751     image->blob->eof=MagickTrue;
 752   return(data);
 753 }
 754
 755 MagickExport MagickBooleanType DiscardBlobBytes(Image *image,
 756   const MagickSizeType length)
 757 {
 758   register MagickOffsetType
 759     i;
 760
 761   size_t
 762     quantum;
 763
 764   ssize_t
 765     count;
 766
 767   unsigned char
 768     buffer[16384];
 769
 770   assert(image != (Image *) NULL);
 771   assert(image->signature == MagickSignature);
 772   count=0;
 773   for (i=0; i < (MagickOffsetType) length; i+=count)
 774   {
 775     quantum=(size_t) MagickMin(length-i,sizeof(buffer));
 776     (void) ReadBlobStream(image,quantum,buffer,&count);
 777     if (count <= 0)
 778       {
 779         count=0;
 780         if (errno != EINTR)
 781           break;
 782       }
 783   }
 784   return(i < (MagickOffsetType) length ? MagickFalse : MagickTrue);
 785 }
 786 \f
 787 /*
 788 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 789 %                                                                             %
 790 %                                                                             %
 791 %                                                                             %
 792 +   D u p l i c a t e s B l o b                                               %
 793 %                                                                             %
 794 %                                                                             %
 795 %                                                                             %
 796 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 797 %
 798 %  DuplicateBlob() duplicates a blob descriptor.
 799 %
 800 %  The format of the DuplicateBlob method is:
 801 %
 802 %      void DuplicateBlob(Image *image,const Image *duplicate)
 803 %
 804 %  A description of each parameter follows:
 805 %
 806 %    o image: the image.
 807 %
 808 %    o duplicate: the duplicate image.
 809 %
 810 */
 811 MagickExport void DuplicateBlob(Image *image,const Image *duplicate)
 812 {
 813   assert(image != (Image *) NULL);
 814   assert(image->signature == MagickSignature);
 815   if (image->debug != MagickFalse)
 816     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 817   assert(duplicate != (Image *) NULL);
 818   assert(duplicate->signature == MagickSignature);
 819   DestroyBlob(image);
 820   image->blob=ReferenceBlob(duplicate->blob);
 821 }
 822 \f
 823 /*
 824 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 825 %                                                                             %
 826 %                                                                             %
 827 %                                                                             %
 828 +  E O F B l o b                                                              %
 829 %                                                                             %
 830 %                                                                             %
 831 %                                                                             %
 832 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 833 %
 834 %  EOFBlob() returns a non-zero value when EOF has been detected reading from
 835 %  a blob or file.
 836 %
 837 %  The format of the EOFBlob method is:
 838 %
 839 %      int EOFBlob(const Image *image)
 840 %
 841 %  A description of each parameter follows:
 842 %
 843 %    o image: the image.
 844 %
 845 */
 846 MagickExport int EOFBlob(const Image *image)
 847 {
 848   assert(image != (Image *) NULL);
 849   assert(image->signature == MagickSignature);
 850   if (image->debug != MagickFalse)
 851     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
 852   assert(image->blob != (BlobInfo *) NULL);
 853   assert(image->blob->type != UndefinedStream);
 854   switch (image->blob->type)
 855   {
 856     case UndefinedStream:
 857     case StandardStream:
 858       break;
 859     case FileStream:
 860     case PipeStream:
 861     {
 862       image->blob->eof=feof(image->blob->file_info.file) != 0 ? MagickTrue :
 863         MagickFalse;
 864       break;
 865     }
 866     case ZipStream:
 867     {
 868       image->blob->eof=MagickFalse;
 869       break;
 870     }
 871     case BZipStream:
 872     {
 873 #if defined(MAGICKCORE_BZLIB_DELEGATE)
 874       int
 875         status;
 876
 877       status=0;
 878       (void) BZ2_bzerror(image->blob->file_info.bzfile,&status);
 879       image->blob->eof=status == BZ_UNEXPECTED_EOF ? MagickTrue : MagickFalse;
 880 #endif
 881       break;
 882     }
 883     case FifoStream:
 884     {
 885       image->blob->eof=MagickFalse;
 886       break;
 887     }
 888     case BlobStream:
 889       break;
 890   }
 891   return((int) image->blob->eof);
 892 }
 893 \f
 894 /*
 895 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 896 %                                                                             %
 897 %                                                                             %
 898 %                                                                             %
 899 +   F i l e T o B l o b                                                       %
 900 %                                                                             %
 901 %                                                                             %
 902 %                                                                             %
 903 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 904 %
 905 %  FileToBlob() returns the contents of a file as a buffer terminated with
 906 %  the '\0' character.  The length of the buffer (not including the extra
 907 %  terminating '\0' character) is returned via the 'length' parameter.  Free
 908 %  the buffer with RelinquishMagickMemory().
 909 %
 910 %  The format of the FileToBlob method is:
 911 %
 912 %      unsigned char *FileToBlob(const char *filename,const size_t extent,
 913 %        size_t *length,ExceptionInfo *exception)
 914 %
 915 %  A description of each parameter follows:
 916 %
 917 %    o blob:  FileToBlob() returns the contents of a file as a blob.  If
 918 %      an error occurs NULL is returned.
 919 %
 920 %    o filename: the filename.
 921 %
 922 %    o extent:  The maximum length of the blob.
 923 %
 924 %    o length: On return, this reflects the actual length of the blob.
 925 %
 926 %    o exception: return any errors or warnings in this structure.
 927 %
 928 */
 929 MagickExport unsigned char *FileToBlob(const char *filename,const size_t extent,
 930   size_t *length,ExceptionInfo *exception)
 931 {
 932   int
 933     file;
 934
 935   MagickOffsetType
 936     offset;
 937
 938   register size_t
 939     i;
 940
 941   ssize_t
 942     count;
 943
 944   unsigned char
 945     *blob;
 946
 947   void
 948     *map;
 949
 950   assert(filename != (const char *) NULL);
 951   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",filename);
 952   assert(exception != (ExceptionInfo *) NULL);
 953   *length=0;
 954   file=fileno(stdin);
 955   if (LocaleCompare(filename,"-") != 0)
 956     file=open_utf8(filename,O_RDONLY | O_BINARY,0);
 957   if (file == -1)
 958     {
 959       ThrowFileException(exception,BlobError,"UnableToOpenFile",filename);
 960       return((unsigned char *) NULL);
 961     }
 962   offset=(MagickOffsetType) lseek(file,0,SEEK_END);
 963   count=0;
 964   if ((offset < 0) || (offset != (MagickOffsetType) ((ssize_t) offset)))
 965     {
 966       size_t
 967         quantum;
 968
 969       struct stat
 970         file_stats;
 971
 972       /*
 973         Stream is not seekable.
 974       */
 975       quantum=(size_t) MagickMaxBufferExtent;
 976       if ((fstat(file,&file_stats) == 0) && (file_stats.st_size != 0))
 977         quantum=(size_t) MagickMin((MagickSizeType) file_stats.st_size,
 978           MagickMaxBufferExtent);
 979       blob=(unsigned char *) AcquireQuantumMemory(quantum,sizeof(*blob));
 980       for (i=0; blob != (unsigned char *) NULL; i+=count)
 981       {
 982         count=(ssize_t) read(file,blob+i,quantum);
 983         if (count <= 0)
 984           {
 985             count=0;
 986             if (errno != EINTR)
 987               break;
 988           }
 989         if (~((size_t) i) < (quantum+1))
 990           {
 991             blob=(unsigned char *) RelinquishMagickMemory(blob);
 992             break;
 993           }
 994         blob=(unsigned char *) ResizeQuantumMemory(blob,i+quantum+1,
 995           sizeof(*blob));
 996         if ((size_t) (i+count) >= extent)
 997           break;
 998       }
 999       if (LocaleCompare(filename,"-") != 0)
1000         file=close(file);
1001       if (blob == (unsigned char *) NULL)
1002         {
1003           (void) ThrowMagickException(exception,GetMagickModule(),
1004             ResourceLimitError,"MemoryAllocationFailed","'%s'",filename);
1005           return((unsigned char *) NULL);
1006         }
1007       if (file == -1)
1008         {
1009           blob=(unsigned char *) RelinquishMagickMemory(blob);
1010           ThrowFileException(exception,BlobError,"UnableToReadBlob",filename);
1011           return((unsigned char *) NULL);
1012         }
1013       *length=(size_t) MagickMin(i+count,extent);
1014       blob[*length]='\0';
1015       return(blob);
1016     }
1017   *length=(size_t) MagickMin((MagickSizeType) offset,extent);
1018   blob=(unsigned char *) NULL;
1019   if (~(*length) >= (MaxTextExtent-1))
1020     blob=(unsigned char *) AcquireQuantumMemory(*length+MaxTextExtent,
1021       sizeof(*blob));
1022   if (blob == (unsigned char *) NULL)
1023     {
1024       file=close(file);
1025       (void) ThrowMagickException(exception,GetMagickModule(),
1026         ResourceLimitError,"MemoryAllocationFailed","'%s'",filename);
1027       return((unsigned char *) NULL);
1028     }
1029   map=MapBlob(file,ReadMode,0,*length);
1030   if (map != (unsigned char *) NULL)
1031     {
1032       (void) memcpy(blob,map,*length);
1033       (void) UnmapBlob(map,*length);
1034     }
1035   else
1036     {
1037       (void) lseek(file,0,SEEK_SET);
1038       for (i=0; i < *length; i+=count)
1039       {
1040         count=(ssize_t) read(file,blob+i,(size_t) MagickMin(*length-i,
1041           (MagickSizeType) SSIZE_MAX));
1042         if (count <= 0)
1043           {
1044             count=0;
1045             if (errno != EINTR)
1046               break;
1047           }
1048       }
1049       if (i < *length)
1050         {
1051           file=close(file)-1;
1052           blob=(unsigned char *) RelinquishMagickMemory(blob);
1053           ThrowFileException(exception,BlobError,"UnableToReadBlob",filename);
1054           return((unsigned char *) NULL);
1055         }
1056     }
1057   blob[*length]='\0';
1058   if (LocaleCompare(filename,"-") != 0)
1059     file=close(file);
1060   if (file == -1)
1061     {
1062       blob=(unsigned char *) RelinquishMagickMemory(blob);
1063       ThrowFileException(exception,BlobError,"UnableToReadBlob",filename);
1064     }
1065   return(blob);
1066 }
1067 \f
1068 /*
1069 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1070 %                                                                             %
1071 %                                                                             %
1072 %                                                                             %
1073 %   F i l e T o I m a g e                                                     %
1074 %                                                                             %
1075 %                                                                             %
1076 %                                                                             %
1077 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1078 %
1079 %  FileToImage() write the contents of a file to an image.
1080 %
1081 %  The format of the FileToImage method is:
1082 %
1083 %      MagickBooleanType FileToImage(Image *,const char *filename)
1084 %
1085 %  A description of each parameter follows:
1086 %
1087 %    o image: the image.
1088 %
1089 %    o filename: the filename.
1090 %
1091 */
1092
1093 static inline ssize_t WriteBlobStream(Image *image,const size_t length,
1094   const unsigned char *data)
1095 {
1096   MagickSizeType
1097     extent;
1098
1099   register unsigned char
1100     *q;
1101
1102   assert(image->blob != (BlobInfo *) NULL);
1103   if (image->blob->type != BlobStream)
1104     return(WriteBlob(image,length,data));
1105   assert(image->blob->type != UndefinedStream);
1106   assert(data != (void *) NULL);
1107   extent=(MagickSizeType) (image->blob->offset+(MagickOffsetType) length);
1108   if (extent >= image->blob->extent)
1109     {
1110       image->blob->quantum<<=1;
1111       extent=image->blob->extent+image->blob->quantum+length;
1112       if (SetBlobExtent(image,extent) == MagickFalse)
1113         return(0);
1114     }
1115   q=image->blob->data+image->blob->offset;
1116   (void) memcpy(q,data,length);
1117   image->blob->offset+=length;
1118   if (image->blob->offset >= (MagickOffsetType) image->blob->length)
1119     image->blob->length=(size_t) image->blob->offset;
1120   return((ssize_t) length);
1121 }
1122
1123 MagickExport MagickBooleanType FileToImage(Image *image,const char *filename,
1124   ExceptionInfo *exception)
1125 {
1126   int
1127     file;
1128
1129   size_t
1130     length,
1131     quantum;
1132
1133   ssize_t
1134     count;
1135
1136   struct stat
1137     file_stats;
1138
1139   unsigned char
1140     *blob;
1141
1142   assert(image != (const Image *) NULL);
1143   assert(image->signature == MagickSignature);
1144   assert(filename != (const char *) NULL);
1145   (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",filename);
1146   file=open_utf8(filename,O_RDONLY | O_BINARY,0);
1147   if (file == -1)
1148     {
1149       ThrowFileException(exception,BlobError,"UnableToOpenBlob",filename);
1150       return(MagickFalse);
1151     }
1152   quantum=(size_t) MagickMaxBufferExtent;
1153   if ((fstat(file,&file_stats) == 0) && (file_stats.st_size != 0))
1154     quantum=(size_t) MagickMin(file_stats.st_size,MagickMaxBufferExtent);
1155   blob=(unsigned char *) AcquireQuantumMemory(quantum,sizeof(*blob));
1156   if (blob == (unsigned char *) NULL)
1157     {
1158       ThrowFileException(exception,ResourceLimitError,"MemoryAllocationFailed",
1159         filename);
1160       return(MagickFalse);
1161     }
1162   for ( ; ; )
1163   {
1164     count=(ssize_t) read(file,blob,quantum);
1165     if (count <= 0)
1166       {
1167         count=0;
1168         if (errno != EINTR)
1169           break;
1170       }
1171     length=(size_t) count;
1172     count=WriteBlobStream(image,length,blob);
1173     if (count != (ssize_t) length)
1174       {
1175         ThrowFileException(exception,BlobError,"UnableToWriteBlob",filename);
1176         break;
1177       }
1178   }
1179   file=close(file);
1180   if (file == -1)
1181     ThrowFileException(exception,BlobError,"UnableToWriteBlob",filename);
1182   blob=(unsigned char *) RelinquishMagickMemory(blob);
1183   return(MagickTrue);
1184 }
1185 \f
1186 /*
1187 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1188 %                                                                             %
1189 %                                                                             %
1190 %                                                                             %
1191 +   G e t B l o b E r r o r                                                   %
1192 %                                                                             %
1193 %                                                                             %
1194 %                                                                             %
1195 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1196 %
1197 %  GetBlobError() returns MagickTrue if the blob associated with the specified
1198 %  image encountered an error.
1199 %
1200 %  The format of the GetBlobError method is:
1201 %
1202 %       MagickBooleanType GetBlobError(const Image *image)
1203 %
1204 %  A description of each parameter follows:
1205 %
1206 %    o image: the image.
1207 %
1208 */
1209 MagickPrivate MagickBooleanType GetBlobError(const Image *image)
1210 {
1211   assert(image != (const Image *) NULL);
1212   assert(image->signature == MagickSignature);
1213   if (image->debug != MagickFalse)
1214     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1215   return(image->blob->status);
1216 }
1217 \f
1218 /*
1219 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1220 %                                                                             %
1221 %                                                                             %
1222 %                                                                             %
1223 +   G e t B l o b F i l e H a n d l e                                         %
1224 %                                                                             %
1225 %                                                                             %
1226 %                                                                             %
1227 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1228 %
1229 %  GetBlobFileHandle() returns the file handle associated with the image blob.
1230 %
1231 %  The format of the GetBlobFile method is:
1232 %
1233 %      FILE *GetBlobFileHandle(const Image *image)
1234 %
1235 %  A description of each parameter follows:
1236 %
1237 %    o image: the image.
1238 %
1239 */
1240 MagickExport FILE *GetBlobFileHandle(const Image *image)
1241 {
1242   assert(image != (const Image *) NULL);
1243   assert(image->signature == MagickSignature);
1244   return(image->blob->file_info.file);
1245 }
1246 \f
1247 /*
1248 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1249 %                                                                             %
1250 %                                                                             %
1251 %                                                                             %
1252 +   G e t B l o b I n f o                                                     %
1253 %                                                                             %
1254 %                                                                             %
1255 %                                                                             %
1256 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1257 %
1258 %  GetBlobInfo() initializes the BlobInfo structure.
1259 %
1260 %  The format of the GetBlobInfo method is:
1261 %
1262 %      void GetBlobInfo(BlobInfo *blob_info)
1263 %
1264 %  A description of each parameter follows:
1265 %
1266 %    o blob_info: Specifies a pointer to a BlobInfo structure.
1267 %
1268 */
1269 MagickPrivate void GetBlobInfo(BlobInfo *blob_info)
1270 {
1271   assert(blob_info != (BlobInfo *) NULL);
1272   (void) ResetMagickMemory(blob_info,0,sizeof(*blob_info));
1273   blob_info->type=UndefinedStream;
1274   blob_info->quantum=(size_t) MagickMaxBlobExtent;
1275   blob_info->properties.st_mtime=time((time_t *) NULL);
1276   blob_info->properties.st_ctime=time((time_t *) NULL);
1277   blob_info->debug=IsEventLogging();
1278   blob_info->reference_count=1;
1279   blob_info->semaphore=AllocateSemaphoreInfo();
1280   blob_info->signature=MagickSignature;
1281 }
1282 \f
1283 /*
1284 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1285 %                                                                             %
1286 %                                                                             %
1287 %                                                                             %
1288 %  G e t B l o b P r o p e r t i e s                                          %
1289 %                                                                             %
1290 %                                                                             %
1291 %                                                                             %
1292 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1293 %
1294 %  GetBlobProperties() returns information about an image blob.
1295 %
1296 %  The format of the GetBlobProperties method is:
1297 %
1298 %      const struct stat *GetBlobProperties(const Image *image)
1299 %
1300 %  A description of each parameter follows:
1301 %
1302 %    o image: the image.
1303 %
1304 */
1305 MagickPrivate const struct stat *GetBlobProperties(const Image *image)
1306 {
1307   assert(image != (Image *) NULL);
1308   assert(image->signature == MagickSignature);
1309   if (image->debug != MagickFalse)
1310     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1311   return(&image->blob->properties);
1312 }
1313 \f
1314 /*
1315 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1316 %                                                                             %
1317 %                                                                             %
1318 %                                                                             %
1319 +  G e t B l o b S i z e                                                      %
1320 %                                                                             %
1321 %                                                                             %
1322 %                                                                             %
1323 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1324 %
1325 %  GetBlobSize() returns the current length of the image file or blob; zero is
1326 %  returned if the size cannot be determined.
1327 %
1328 %  The format of the GetBlobSize method is:
1329 %
1330 %      MagickSizeType GetBlobSize(const Image *image)
1331 %
1332 %  A description of each parameter follows:
1333 %
1334 %    o image: the image.
1335 %
1336 */
1337 MagickExport MagickSizeType GetBlobSize(const Image *image)
1338 {
1339   MagickSizeType
1340     extent;
1341
1342   assert(image != (Image *) NULL);
1343   assert(image->signature == MagickSignature);
1344   if (image->debug != MagickFalse)
1345     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1346   assert(image->blob != (BlobInfo *) NULL);
1347   extent=0;
1348   switch (image->blob->type)
1349   {
1350     case UndefinedStream:
1351     {
1352       extent=image->blob->size;
1353       break;
1354     }
1355     case StandardStream:
1356     {
1357       extent=image->blob->size;
1358       break;
1359     }
1360     case FileStream:
1361     {
1362       if (fstat(fileno(image->blob->file_info.file),&image->blob->properties) == 0)
1363         extent=(MagickSizeType) image->blob->properties.st_size;
1364       break;
1365     }
1366     case PipeStream:
1367     {
1368       extent=image->blob->size;
1369       break;
1370     }
1371     case ZipStream:
1372     case BZipStream:
1373     {
1374       MagickBooleanType
1375         status;
1376
1377       status=GetPathAttributes(image->filename,&image->blob->properties);
1378       if (status != MagickFalse)
1379         extent=(MagickSizeType) image->blob->properties.st_size;
1380       break;
1381     }
1382     case FifoStream:
1383       break;
1384     case BlobStream:
1385     {
1386       extent=(MagickSizeType) image->blob->length;
1387       break;
1388     }
1389   }
1390   return(extent);
1391 }
1392 \f
1393 /*
1394 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1395 %                                                                             %
1396 %                                                                             %
1397 %                                                                             %
1398 +   G e t B l o b S t r e a m D a t a                                         %
1399 %                                                                             %
1400 %                                                                             %
1401 %                                                                             %
1402 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1403 %
1404 %  GetBlobStreamData() returns the stream data for the image.
1405 %
1406 %  The format of the GetBlobStreamData method is:
1407 %
1408 %      unsigned char *GetBlobStreamData(const Image *image)
1409 %
1410 %  A description of each parameter follows:
1411 %
1412 %    o image: the image.
1413 %
1414 */
1415 MagickExport unsigned char *GetBlobStreamData(const Image *image)
1416 {
1417   assert(image != (const Image *) NULL);
1418   assert(image->signature == MagickSignature);
1419   return(image->blob->data);
1420 }
1421 \f
1422 /*
1423 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1424 %                                                                             %
1425 %                                                                             %
1426 %                                                                             %
1427 +   G e t B l o b S t r e a m H a n d l e r                                   %
1428 %                                                                             %
1429 %                                                                             %
1430 %                                                                             %
1431 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1432 %
1433 %  GetBlobStreamHandler() returns the stream handler for the image.
1434 %
1435 %  The format of the GetBlobStreamHandler method is:
1436 %
1437 %      StreamHandler GetBlobStreamHandler(const Image *image)
1438 %
1439 %  A description of each parameter follows:
1440 %
1441 %    o image: the image.
1442 %
1443 */
1444 MagickPrivate StreamHandler GetBlobStreamHandler(const Image *image)
1445 {
1446   assert(image != (const Image *) NULL);
1447   assert(image->signature == MagickSignature);
1448   if (image->debug != MagickFalse)
1449     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1450   return(image->blob->stream);
1451 }
1452 \f
1453 /*
1454 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1455 %                                                                             %
1456 %                                                                             %
1457 %                                                                             %
1458 %   I m a g e T o B l o b                                                     %
1459 %                                                                             %
1460 %                                                                             %
1461 %                                                                             %
1462 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1463 %
1464 %  ImageToBlob() implements direct to memory image formats.  It returns the
1465 %  image as a formatted blob and its length.  The magick member of the Image
1466 %  structure determines the format of the returned blob (GIF, JPEG, PNG,
1467 %  etc.).  This method is the equivalent of WriteImage(), but writes the
1468 %  formatted "file" to a memory buffer rather than to an actual file.
1469 %
1470 %  The format of the ImageToBlob method is:
1471 %
1472 %      unsigned char *ImageToBlob(const ImageInfo *image_info,Image *image,
1473 %        size_t *length,ExceptionInfo *exception)
1474 %
1475 %  A description of each parameter follows:
1476 %
1477 %    o image_info: the image info.
1478 %
1479 %    o image: the image.
1480 %
1481 %    o length: This pointer to a size_t integer sets the initial length of the
1482 %      blob.  On return, it reflects the actual length of the blob.
1483 %
1484 %    o exception: return any errors or warnings in this structure.
1485 %
1486 */
1487 MagickExport unsigned char *ImageToBlob(const ImageInfo *image_info,
1488   Image *image,size_t *length,ExceptionInfo *exception)
1489 {
1490   const MagickInfo
1491     *magick_info;
1492
1493   ImageInfo
1494     *blob_info;
1495
1496   MagickBooleanType
1497     status;
1498
1499   unsigned char
1500     *blob;
1501
1502   assert(image_info != (const ImageInfo *) NULL);
1503   assert(image_info->signature == MagickSignature);
1504   if (image_info->debug != MagickFalse)
1505     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
1506       image_info->filename);
1507   assert(image != (Image *) NULL);
1508   assert(image->signature == MagickSignature);
1509   assert(exception != (ExceptionInfo *) NULL);
1510   *length=0;
1511   blob=(unsigned char *) NULL;
1512   blob_info=CloneImageInfo(image_info);
1513   blob_info->adjoin=MagickFalse;
1514   (void) SetImageInfo(blob_info,1,exception);
1515   if (*blob_info->magick != '\0')
1516     (void) CopyMagickString(image->magick,blob_info->magick,MaxTextExtent);
1517   magick_info=GetMagickInfo(image->magick,exception);
1518   if (magick_info == (const MagickInfo *) NULL)
1519     {
1520       (void) ThrowMagickException(exception,GetMagickModule(),
1521         MissingDelegateError,"NoDecodeDelegateForThisImageFormat","'%s'",
1522         image->filename);
1523       return(blob);
1524     }
1525   (void) CopyMagickString(blob_info->magick,image->magick,MaxTextExtent);
1526   if (GetMagickBlobSupport(magick_info) != MagickFalse)
1527     {
1528       /*
1529         Native blob support for this image format.
1530       */
1531       blob_info->length=0;
1532       blob_info->blob=(void *) AcquireQuantumMemory(MagickMaxBlobExtent,
1533         sizeof(unsigned char));
1534       if (blob_info->blob == (void *) NULL)
1535         (void) ThrowMagickException(exception,GetMagickModule(),
1536           ResourceLimitError,"MemoryAllocationFailed","'%s'",image->filename);
1537       else
1538         {
1539           (void) CloseBlob(image);
1540           image->blob->exempt=MagickTrue;
1541           *image->filename='\0';
1542           status=WriteImage(blob_info,image,exception);
1543           *length=image->blob->length;
1544           blob=DetachBlob(image->blob);
1545           if (status == MagickFalse)
1546             blob=(unsigned char *) RelinquishMagickMemory(blob);
1547           else
1548             blob=(unsigned char *) ResizeQuantumMemory(blob,*length+1,
1549               sizeof(*blob));
1550         }
1551     }
1552   else
1553     {
1554       char
1555         unique[MaxTextExtent];
1556
1557       int
1558         file;
1559
1560       /*
1561         Write file to disk in blob image format.
1562       */
1563       file=AcquireUniqueFileResource(unique);
1564       if (file == -1)
1565         {
1566           ThrowFileException(exception,BlobError,"UnableToWriteBlob",
1567             image_info->filename);
1568         }
1569       else
1570         {
1571           blob_info->file=fdopen(file,"wb");
1572           if (blob_info->file != (FILE *) NULL)
1573             {
1574               (void) FormatLocaleString(image->filename,MaxTextExtent,"%s:%s",
1575                 image->magick,unique);
1576               status=WriteImage(blob_info,image,exception);
1577               (void) fclose(blob_info->file);
1578               if (status != MagickFalse)
1579                 blob=FileToBlob(image->filename,~0UL,length,exception);
1580             }
1581           (void) RelinquishUniqueFileResource(unique);
1582         }
1583     }
1584   blob_info=DestroyImageInfo(blob_info);
1585   return(blob);
1586 }
1587 \f
1588 /*
1589 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1590 %                                                                             %
1591 %                                                                             %
1592 %                                                                             %
1593 %   I m a g e T o F i l e                                                     %
1594 %                                                                             %
1595 %                                                                             %
1596 %                                                                             %
1597 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1598 %
1599 %  ImageToFile() writes an image to a file.  It returns MagickFalse if an error
1600 %  occurs otherwise MagickTrue.
1601 %
1602 %  The format of the ImageToFile method is:
1603 %
1604 %       MagickBooleanType ImageToFile(Image *image,char *filename,
1605 %         ExceptionInfo *exception)
1606 %
1607 %  A description of each parameter follows:
1608 %
1609 %    o image: the image.
1610 %
1611 %    o filename: Write the image to this file.
1612 %
1613 %    o exception: return any errors or warnings in this structure.
1614 %
1615 */
1616 MagickExport MagickBooleanType ImageToFile(Image *image,char *filename,
1617   ExceptionInfo *exception)
1618 {
1619   int
1620     file;
1621
1622   register const unsigned char
1623     *p;
1624
1625   register size_t
1626     i;
1627
1628   size_t
1629     length,
1630     quantum;
1631
1632   ssize_t
1633     count;
1634
1635   struct stat
1636     file_stats;
1637
1638   unsigned char
1639     *buffer;
1640
1641   assert(image != (Image *) NULL);
1642   assert(image->signature == MagickSignature);
1643   assert(image->blob != (BlobInfo *) NULL);
1644   assert(image->blob->type != UndefinedStream);
1645   if (image->debug != MagickFalse)
1646     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",filename);
1647   assert(filename != (const char *) NULL);
1648   if (*filename == '\0')
1649     file=AcquireUniqueFileResource(filename);
1650   else
1651     if (LocaleCompare(filename,"-") == 0)
1652       file=fileno(stdout);
1653     else
1654       file=open_utf8(filename,O_RDWR | O_CREAT | O_EXCL | O_BINARY,S_MODE);
1655   if (file == -1)
1656     {
1657       ThrowFileException(exception,BlobError,"UnableToWriteBlob",filename);
1658       return(MagickFalse);
1659     }
1660   quantum=(size_t) MagickMaxBufferExtent;
1661   if ((fstat(file,&file_stats) == 0) && (file_stats.st_size != 0))
1662     quantum=(size_t) MagickMin((MagickSizeType) file_stats.st_size,
1663       MagickMaxBufferExtent);
1664   buffer=(unsigned char *) AcquireQuantumMemory(quantum,sizeof(*buffer));
1665   if (buffer == (unsigned char *) NULL)
1666     {
1667       file=close(file)-1;
1668       (void) ThrowMagickException(exception,GetMagickModule(),
1669         ResourceLimitError,"MemoryAllocationError","'%s'",filename);
1670       return(MagickFalse);
1671     }
1672   length=0;
1673   p=ReadBlobStream(image,quantum,buffer,&count);
1674   for (i=0; count > 0; p=ReadBlobStream(image,quantum,buffer,&count))
1675   {
1676     length=(size_t) count;
1677     for (i=0; i < length; i+=count)
1678     {
1679       count=write(file,p+i,(size_t) (length-i));
1680       if (count <= 0)
1681         {
1682           count=0;
1683           if (errno != EINTR)
1684             break;
1685         }
1686     }
1687     if (i < length)
1688       break;
1689   }
1690   if (LocaleCompare(filename,"-") != 0)
1691     file=close(file);
1692   buffer=(unsigned char *) RelinquishMagickMemory(buffer);
1693   if ((file == -1) || (i < length))
1694     {
1695       ThrowFileException(exception,BlobError,"UnableToWriteBlob",filename);
1696       return(MagickFalse);
1697     }
1698   return(MagickTrue);
1699 }
1700 \f
1701 /*
1702 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1703 %                                                                             %
1704 %                                                                             %
1705 %                                                                             %
1706 %   I m a g e s T o B l o b                                                   %
1707 %                                                                             %
1708 %                                                                             %
1709 %                                                                             %
1710 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1711 %
1712 %  ImagesToBlob() implements direct to memory image formats.  It returns the
1713 %  image sequence as a blob and its length.  The magick member of the ImageInfo
1714 %  structure determines the format of the returned blob (GIF, JPEG,  PNG, etc.)
1715 %
1716 %  Note, some image formats do not permit multiple images to the same image
1717 %  stream (e.g. JPEG).  in this instance, just the first image of the
1718 %  sequence is returned as a blob.
1719 %
1720 %  The format of the ImagesToBlob method is:
1721 %
1722 %      unsigned char *ImagesToBlob(const ImageInfo *image_info,Image *images,
1723 %        size_t *length,ExceptionInfo *exception)
1724 %
1725 %  A description of each parameter follows:
1726 %
1727 %    o image_info: the image info.
1728 %
1729 %    o images: the image list.
1730 %
1731 %    o length: This pointer to a size_t integer sets the initial length of the
1732 %      blob.  On return, it reflects the actual length of the blob.
1733 %
1734 %    o exception: return any errors or warnings in this structure.
1735 %
1736 */
1737 MagickExport unsigned char *ImagesToBlob(const ImageInfo *image_info,
1738   Image *images,size_t *length,ExceptionInfo *exception)
1739 {
1740   const MagickInfo
1741     *magick_info;
1742
1743   ImageInfo
1744     *blob_info;
1745
1746   MagickBooleanType
1747     status;
1748
1749   unsigned char
1750     *blob;
1751
1752   assert(image_info != (const ImageInfo *) NULL);
1753   assert(image_info->signature == MagickSignature);
1754   if (image_info->debug != MagickFalse)
1755     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
1756       image_info->filename);
1757   assert(images != (Image *) NULL);
1758   assert(images->signature == MagickSignature);
1759   assert(exception != (ExceptionInfo *) NULL);
1760   *length=0;
1761   blob=(unsigned char *) NULL;
1762   blob_info=CloneImageInfo(image_info);
1763   (void) SetImageInfo(blob_info,(unsigned int) GetImageListLength(images),
1764     exception);
1765   if (*blob_info->magick != '\0')
1766     (void) CopyMagickString(images->magick,blob_info->magick,MaxTextExtent);
1767   if (blob_info->adjoin == MagickFalse)
1768     {
1769       blob_info=DestroyImageInfo(blob_info);
1770       return(ImageToBlob(image_info,images,length,exception));
1771     }
1772   magick_info=GetMagickInfo(images->magick,exception);
1773   if (magick_info == (const MagickInfo *) NULL)
1774     {
1775       (void) ThrowMagickException(exception,GetMagickModule(),
1776         MissingDelegateError,"NoDecodeDelegateForThisImageFormat","'%s'",
1777         images->filename);
1778       return(blob);
1779     }
1780   (void) CopyMagickString(blob_info->magick,images->magick,MaxTextExtent);
1781   if (GetMagickBlobSupport(magick_info) != MagickFalse)
1782     {
1783       /*
1784         Native blob support for this images format.
1785       */
1786       blob_info->length=0;
1787       blob_info->blob=(void *) AcquireQuantumMemory(MagickMaxBlobExtent,
1788         sizeof(unsigned char));
1789       if (blob_info->blob == (void *) NULL)
1790         (void) ThrowMagickException(exception,GetMagickModule(),
1791           ResourceLimitError,"MemoryAllocationFailed","'%s'",images->filename);
1792       else
1793         {
1794           images->blob->exempt=MagickTrue;
1795           *images->filename='\0';
1796           status=WriteImages(blob_info,images,images->filename,exception);
1797           if ((status != MagickFalse) && (images->blob->length != 0))
1798             {
1799               *length=images->blob->length;
1800               blob=DetachBlob(images->blob);
1801               blob=(unsigned char *) ResizeQuantumMemory(blob,*length,
1802                 sizeof(*blob));
1803             }
1804         }
1805     }
1806   else
1807     {
1808       char
1809         filename[MaxTextExtent],
1810         unique[MaxTextExtent];
1811
1812       int
1813         file;
1814
1815       /*
1816         Write file to disk in blob images format.
1817       */
1818       file=AcquireUniqueFileResource(unique);
1819       if (file == -1)
1820         {
1821           ThrowFileException(exception,FileOpenError,"UnableToWriteBlob",
1822             image_info->filename);
1823         }
1824       else
1825         {
1826           blob_info->file=fdopen(file,"wb");
1827           if (blob_info->file != (FILE *) NULL)
1828             {
1829               (void) FormatLocaleString(filename,MaxTextExtent,"%s:%s",
1830                 images->magick,unique);
1831               status=WriteImages(blob_info,images,filename,exception);
1832               (void) fclose(blob_info->file);
1833               if (status != MagickFalse)
1834                 blob=FileToBlob(images->filename,~0UL,length,exception);
1835             }
1836           (void) RelinquishUniqueFileResource(unique);
1837         }
1838     }
1839   blob_info=DestroyImageInfo(blob_info);
1840   return(blob);
1841 }
1842 /*
1843 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1844 %                                                                             %
1845 %                                                                             %
1846 %                                                                             %
1847 %   I n j e c t I m a g e B l o b                                             %
1848 %                                                                             %
1849 %                                                                             %
1850 %                                                                             %
1851 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1852 %
1853 %  InjectImageBlob() injects the image with a copy of itself in the specified
1854 %  format (e.g. inject JPEG into a PDF image).
1855 %
1856 %  The format of the InjectImageBlob method is:
1857 %
1858 %      MagickBooleanType InjectImageBlob(const ImageInfo *image_info,
1859 %        Image *image,Image *inject_image,const char *format,
1860 %        ExceptionInfo *exception)
1861 %
1862 %  A description of each parameter follows:
1863 %
1864 %    o image_info: the image info..
1865 %
1866 %    o image: the image.
1867 %
1868 %    o inject_image: inject into the image stream.
1869 %
1870 %    o format: the image format.
1871 %
1872 %    o exception: return any errors or warnings in this structure.
1873 %
1874 */
1875 MagickExport MagickBooleanType InjectImageBlob(const ImageInfo *image_info,
1876   Image *image,Image *inject_image,const char *format,ExceptionInfo *exception)
1877 {
1878   char
1879     filename[MaxTextExtent];
1880
1881   FILE
1882     *unique_file;
1883
1884   Image
1885     *byte_image;
1886
1887   ImageInfo
1888     *write_info;
1889
1890   int
1891     file;
1892
1893   MagickBooleanType
1894     status;
1895
1896   register ssize_t
1897     i;
1898
1899   size_t
1900     quantum;
1901
1902   ssize_t
1903     count;
1904
1905   struct stat
1906     file_stats;
1907
1908   unsigned char
1909     *buffer;
1910
1911   /*
1912     Write inject image to a temporary file.
1913   */
1914   assert(image_info != (ImageInfo *) NULL);
1915   assert(image_info->signature == MagickSignature);
1916   assert(image != (Image *) NULL);
1917   assert(image->signature == MagickSignature);
1918   if (image->debug != MagickFalse)
1919     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
1920   assert(inject_image != (Image *) NULL);
1921   assert(inject_image->signature == MagickSignature);
1922   assert(exception != (ExceptionInfo *) NULL);
1923   unique_file=(FILE *) NULL;
1924   file=AcquireUniqueFileResource(filename);
1925   if (file != -1)
1926     unique_file=fdopen(file,"wb");
1927   if ((file == -1) || (unique_file == (FILE *) NULL))
1928     {
1929       (void) CopyMagickString(image->filename,filename,MaxTextExtent);
1930       ThrowFileException(exception,FileOpenError,"UnableToCreateTemporaryFile",
1931         image->filename);
1932       return(MagickFalse);
1933     }
1934   byte_image=CloneImage(inject_image,0,0,MagickFalse,exception);
1935   if (byte_image == (Image *) NULL)
1936     {
1937       (void) fclose(unique_file);
1938       (void) RelinquishUniqueFileResource(filename);
1939       return(MagickFalse);
1940     }
1941   (void) FormatLocaleString(byte_image->filename,MaxTextExtent,"%s:%s",format,
1942     filename);
1943   DestroyBlob(byte_image);
1944   byte_image->blob=CloneBlobInfo((BlobInfo *) NULL);
1945   write_info=CloneImageInfo(image_info);
1946   SetImageInfoFile(write_info,unique_file);
1947   status=WriteImage(write_info,byte_image,exception);
1948   write_info=DestroyImageInfo(write_info);
1949   byte_image=DestroyImage(byte_image);
1950   (void) fclose(unique_file);
1951   if (status == MagickFalse)
1952     {
1953       (void) RelinquishUniqueFileResource(filename);
1954       return(MagickFalse);
1955     }
1956   /*
1957     Inject into image stream.
1958   */
1959   file=open_utf8(filename,O_RDONLY | O_BINARY,0);
1960   if (file == -1)
1961     {
1962       (void) RelinquishUniqueFileResource(filename);
1963       ThrowFileException(exception,FileOpenError,"UnableToOpenFile",
1964         image_info->filename);
1965       return(MagickFalse);
1966     }
1967   quantum=(size_t) MagickMaxBufferExtent;
1968   if ((fstat(file,&file_stats) == 0) && (file_stats.st_size != 0))
1969     quantum=(size_t) MagickMin(file_stats.st_size,MagickMaxBufferExtent);
1970   buffer=(unsigned char *) AcquireQuantumMemory(quantum,sizeof(*buffer));
1971   if (buffer == (unsigned char *) NULL)
1972     {
1973       (void) RelinquishUniqueFileResource(filename);
1974       ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
1975         image->filename);
1976     }
1977   for (i=0; ; i+=count)
1978   {
1979     count=(ssize_t) read(file,buffer,quantum);
1980     if (count <= 0)
1981       {
1982         count=0;
1983         if (errno != EINTR)
1984           break;
1985       }
1986     status=WriteBlobStream(image,(size_t) count,buffer) == count ? MagickTrue :
1987       MagickFalse;
1988   }
1989   file=close(file);
1990   if (file == -1)
1991     ThrowFileException(exception,FileOpenError,"UnableToWriteBlob",filename);
1992   (void) RelinquishUniqueFileResource(filename);
1993   buffer=(unsigned char *) RelinquishMagickMemory(buffer);
1994   return(status);
1995 }
1996 \f
1997 /*
1998 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
1999 %                                                                             %
2000 %                                                                             %
2001 %                                                                             %
2002 +   I s B l o b E x e m p t                                                   %
2003 %                                                                             %
2004 %                                                                             %
2005 %                                                                             %
2006 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2007 %
2008 %  IsBlobExempt() returns true if the blob is exempt.
2009 %
2010 %  The format of the IsBlobExempt method is:
2011 %
2012 %       MagickBooleanType IsBlobExempt(const Image *image)
2013 %
2014 %  A description of each parameter follows:
2015 %
2016 %    o image: the image.
2017 %
2018 */
2019 MagickPrivate MagickBooleanType IsBlobExempt(const Image *image)
2020 {
2021   assert(image != (const Image *) NULL);
2022   assert(image->signature == MagickSignature);
2023   if (image->debug != MagickFalse)
2024     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2025   return(image->blob->exempt);
2026 }
2027 \f
2028 /*
2029 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2030 %                                                                             %
2031 %                                                                             %
2032 %                                                                             %
2033 +   I s B l o b S e e k a b l e                                               %
2034 %                                                                             %
2035 %                                                                             %
2036 %                                                                             %
2037 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2038 %
2039 %  IsBlobSeekable() returns true if the blob is seekable.
2040 %
2041 %  The format of the IsBlobSeekable method is:
2042 %
2043 %       MagickBooleanType IsBlobSeekable(const Image *image)
2044 %
2045 %  A description of each parameter follows:
2046 %
2047 %    o image: the image.
2048 %
2049 */
2050 MagickPrivate MagickBooleanType IsBlobSeekable(const Image *image)
2051 {
2052   MagickBooleanType
2053     seekable;
2054
2055   assert(image != (const Image *) NULL);
2056   assert(image->signature == MagickSignature);
2057   if (image->debug != MagickFalse)
2058     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2059   switch (image->blob->type)
2060   {
2061     case FileStream:
2062     case BlobStream:
2063     case ZipStream:
2064     {
2065       seekable=MagickTrue;
2066       break;
2067     }
2068     default:
2069     {
2070       seekable=MagickFalse;
2071       break;
2072     }
2073   }
2074   return(seekable);
2075 }
2076 \f
2077 /*
2078 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2079 %                                                                             %
2080 %                                                                             %
2081 %                                                                             %
2082 +   I s B l o b T e m p o r a r y                                             %
2083 %                                                                             %
2084 %                                                                             %
2085 %                                                                             %
2086 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2087 %
2088 %  IsBlobTemporary() returns true if the blob is temporary.
2089 %
2090 %  The format of the IsBlobTemporary method is:
2091 %
2092 %       MagickBooleanType IsBlobTemporary(const Image *image)
2093 %
2094 %  A description of each parameter follows:
2095 %
2096 %    o image: the image.
2097 %
2098 */
2099 MagickPrivate MagickBooleanType IsBlobTemporary(const Image *image)
2100 {
2101   assert(image != (const Image *) NULL);
2102   assert(image->signature == MagickSignature);
2103   if (image->debug != MagickFalse)
2104     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
2105   return(image->blob->temporary);
2106 }
2107 \f
2108 /*
2109 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2110 %                                                                             %
2111 %                                                                             %
2112 %                                                                             %
2113 +  M a p B l o b                                                              %
2114 %                                                                             %
2115 %                                                                             %
2116 %                                                                             %
2117 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2118 %
2119 %  MapBlob() creates a mapping from a file to a binary large object.
2120 %
2121 %  The format of the MapBlob method is:
2122 %
2123 %      unsigned char *MapBlob(int file,const MapMode mode,
2124 %        const MagickOffsetType offset,const size_t length)
2125 %
2126 %  A description of each parameter follows:
2127 %
2128 %    o file: map this file descriptor.
2129 %
2130 %    o mode: ReadMode, WriteMode, or IOMode.
2131 %
2132 %    o offset: starting at this offset within the file.
2133 %
2134 %    o length: the length of the mapping is returned in this pointer.
2135 %
2136 */
2137 MagickExport unsigned char *MapBlob(int file,const MapMode mode,
2138   const MagickOffsetType offset,const size_t length)
2139 {
2140 #if defined(MAGICKCORE_HAVE_MMAP_FILEIO)
2141   int
2142     flags,
2143     protection;
2144
2145   unsigned char
2146     *map;
2147
2148   /*
2149     Map file.
2150   */
2151   flags=0;
2152   if (file == -1)
2153 #if defined(MAP_ANONYMOUS)
2154     flags|=MAP_ANONYMOUS;
2155 #else
2156     return((unsigned char *) NULL);
2157 #endif
2158   switch (mode)
2159   {
2160     case ReadMode:
2161     default:
2162     {
2163       protection=PROT_READ;
2164       flags|=MAP_PRIVATE;
2165       map=(unsigned char *) mmap((char *) NULL,length,protection,flags,file,
2166         (off_t) offset);
2167       break;
2168     }
2169     case WriteMode:
2170     {
2171       protection=PROT_WRITE;
2172       flags|=MAP_SHARED;
2173       map=(unsigned char *) mmap((char *) NULL,length,protection,flags,file,
2174         (off_t) offset);
2175 #if defined(MAGICKCORE_HAVE_POSIX_MADVISE)
2176       (void) posix_madvise(map,length,POSIX_MADV_SEQUENTIAL |
2177         POSIX_MADV_WILLNEED);
2178 #endif
2179       break;
2180     }
2181     case IOMode:
2182     {
2183       protection=PROT_READ | PROT_WRITE;
2184       flags|=MAP_SHARED;
2185       map=(unsigned char *) mmap((char *) NULL,length,protection,flags,file,
2186         (off_t) offset);
2187       break;
2188     }
2189   }
2190   if (map == (unsigned char *) MAP_FAILED)
2191     return((unsigned char *) NULL);
2192   return(map);
2193 #else
2194   (void) file;
2195   (void) mode;
2196   (void) offset;
2197   (void) length;
2198   return((unsigned char *) NULL);
2199 #endif
2200 }
2201 \f
2202 /*
2203 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2204 %                                                                             %
2205 %                                                                             %
2206 %                                                                             %
2207 +  M S B O r d e r L o n g                                                    %
2208 %                                                                             %
2209 %                                                                             %
2210 %                                                                             %
2211 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2212 %
2213 %  MSBOrderLong() converts a least-significant byte first buffer of integers to
2214 %  most-significant byte first.
2215 %
2216 %  The format of the MSBOrderLong method is:
2217 %
2218 %      void MSBOrderLong(unsigned char *buffer,const size_t length)
2219 %
2220 %  A description of each parameter follows.
2221 %
2222 %   o  buffer:  Specifies a pointer to a buffer of integers.
2223 %
2224 %   o  length:  Specifies the length of the buffer.
2225 %
2226 */
2227 MagickExport void MSBOrderLong(unsigned char *buffer,const size_t length)
2228 {
2229   int
2230     c;
2231
2232   register unsigned char
2233     *p,
2234     *q;
2235
2236   assert(buffer != (unsigned char *) NULL);
2237   q=buffer+length;
2238   while (buffer < q)
2239   {
2240     p=buffer+3;
2241     c=(int) (*p);
2242     *p=(*buffer);
2243     *buffer++=(unsigned char) c;
2244     p=buffer+1;
2245     c=(int) (*p);
2246     *p=(*buffer);
2247     *buffer++=(unsigned char) c;
2248     buffer+=2;
2249   }
2250 }
2251 \f
2252 /*
2253 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2254 %                                                                             %
2255 %                                                                             %
2256 %                                                                             %
2257 +  M S B O r d e r S h o r t                                                  %
2258 %                                                                             %
2259 %                                                                             %
2260 %                                                                             %
2261 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2262 %
2263 %  MSBOrderShort() converts a least-significant byte first buffer of integers
2264 %  to most-significant byte first.
2265 %
2266 %  The format of the MSBOrderShort method is:
2267 %
2268 %      void MSBOrderShort(unsigned char *p,const size_t length)
2269 %
2270 %  A description of each parameter follows.
2271 %
2272 %   o  p:  Specifies a pointer to a buffer of integers.
2273 %
2274 %   o  length:  Specifies the length of the buffer.
2275 %
2276 */
2277 MagickExport void MSBOrderShort(unsigned char *p,const size_t length)
2278 {
2279   int
2280     c;
2281
2282   register unsigned char
2283     *q;
2284
2285   assert(p != (unsigned char *) NULL);
2286   q=p+length;
2287   while (p < q)
2288   {
2289     c=(int) (*p);
2290     *p=(*(p+1));
2291     p++;
2292     *p++=(unsigned char) c;
2293   }
2294 }
2295 \f
2296 /*
2297 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2298 %                                                                             %
2299 %                                                                             %
2300 %                                                                             %
2301 +   O p e n B l o b                                                           %
2302 %                                                                             %
2303 %                                                                             %
2304 %                                                                             %
2305 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2306 %
2307 %  OpenBlob() opens a file associated with the image.  A file name of '-' sets
2308 %  the file to stdin for type 'r' and stdout for type 'w'.  If the filename
2309 %  suffix is '.gz' or '.Z', the image is decompressed for type 'r' and
2310 %  compressed for type 'w'.  If the filename prefix is '|', it is piped to or
2311 %  from a system command.
2312 %
2313 %  The format of the OpenBlob method is:
2314 %
2315 %       MagickBooleanType OpenBlob(const ImageInfo *image_info,Image *image,
2316 %        const BlobMode mode,ExceptionInfo *exception)
2317 %
2318 %  A description of each parameter follows:
2319 %
2320 %    o image_info: the image info.
2321 %
2322 %    o image: the image.
2323 %
2324 %    o mode: the mode for opening the file.
2325 %
2326 */
2327 MagickExport MagickBooleanType OpenBlob(const ImageInfo *image_info,
2328   Image *image,const BlobMode mode,ExceptionInfo *exception)
2329 {
2330   char
2331     extension[MaxTextExtent],
2332     filename[MaxTextExtent];
2333
2334   const char
2335     *type;
2336
2337   MagickBooleanType
2338     status;
2339
2340   PolicyRights
2341     rights;
2342
2343   assert(image_info != (ImageInfo *) NULL);
2344   assert(image_info->signature == MagickSignature);
2345   if (image_info->debug != MagickFalse)
2346     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
2347       image_info->filename);
2348   assert(image != (Image *) NULL);
2349   assert(image->signature == MagickSignature);
2350   if (image_info->blob != (void *) NULL)
2351     {
2352       if (image_info->stream != (StreamHandler) NULL)
2353         image->blob->stream=(StreamHandler) image_info->stream;
2354       AttachBlob(image->blob,image_info->blob,image_info->length);
2355       return(MagickTrue);
2356     }
2357   (void) DetachBlob(image->blob);
2358   switch (mode)
2359   {
2360     default: type="r"; break;
2361     case ReadBlobMode: type="r"; break;
2362     case ReadBinaryBlobMode: type="rb"; break;
2363     case WriteBlobMode: type="w"; break;
2364     case WriteBinaryBlobMode: type="w+b"; break;
2365     case AppendBlobMode: type="a"; break;
2366     case AppendBinaryBlobMode: type="a+b"; break;
2367   }
2368   if (*type != 'r')
2369     image->blob->synchronize=image_info->synchronize;
2370   if (image_info->stream != (StreamHandler) NULL)
2371     {
2372       image->blob->stream=(StreamHandler) image_info->stream;
2373       if (*type == 'w')
2374         {
2375           image->blob->type=FifoStream;
2376           return(MagickTrue);
2377         }
2378     }
2379   /*
2380     Open image file.
2381   */
2382   *filename='\0';
2383   (void) CopyMagickString(filename,image->filename,MaxTextExtent);
2384   rights=ReadPolicyRights;
2385   if (*type == 'w')
2386     rights=WritePolicyRights;
2387   if (IsRightsAuthorized(PathPolicyDomain,rights,filename) == MagickFalse)
2388     {
2389       errno=EPERM;
2390       (void) ThrowMagickException(exception,GetMagickModule(),PolicyError,
2391         "NotAuthorized","'%s'",filename);
2392       return(MagickFalse);
2393     }
2394   if ((LocaleCompare(filename,"-") == 0) ||
2395       ((*filename == '\0') && (image_info->file == (FILE *) NULL)))
2396     {
2397       image->blob->file_info.file=(*type == 'r') ? stdin : stdout;
2398 #if defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__OS2__)
2399       if (strchr(type,'b') != (char *) NULL)
2400         setmode(_fileno(image->blob->file_info.file),_O_BINARY);
2401 #endif
2402       image->blob->type=StandardStream;
2403       image->blob->exempt=MagickTrue;
2404       return(MagickTrue);
2405     }
2406   if (LocaleNCompare(filename,"fd:",3) == 0)
2407     {
2408       char
2409         mode[MaxTextExtent];
2410
2411       *mode=(*type);
2412       mode[1]='\0';
2413       image->blob->file_info.file=fdopen(StringToLong(filename+3),mode);
2414 #if defined(MAGICKCORE_WINDOWS_SUPPORT) || defined(__OS2__)
2415       if (strchr(type,'b') != (char *) NULL)
2416         setmode(_fileno(image->blob->file_info.file),_O_BINARY);
2417 #endif
2418       image->blob->type=StandardStream;
2419       image->blob->exempt=MagickTrue;
2420       return(MagickTrue);
2421     }
2422 #if defined(MAGICKCORE_HAVE_POPEN)
2423   if (*filename == '|')
2424     {
2425       char
2426         mode[MaxTextExtent];
2427
2428       /*
2429         Pipe image to or from a system command.
2430       */
2431 #if defined(SIGPIPE)
2432       if (*type == 'w')
2433         (void) signal(SIGPIPE,SIG_IGN);
2434 #endif
2435       *mode=(*type);
2436       mode[1]='\0';
2437       image->blob->file_info.file=(FILE *) popen_utf8(filename+1,mode);
2438       if (image->blob->file_info.file == (FILE *) NULL)
2439         {
2440           ThrowFileException(exception,BlobError,"UnableToOpenBlob",filename);
2441           return(MagickFalse);
2442         }
2443       image->blob->type=PipeStream;
2444       image->blob->exempt=MagickTrue;
2445       return(MagickTrue);
2446     }
2447 #endif
2448   status=GetPathAttributes(filename,&image->blob->properties);
2449 #if defined(S_ISFIFO)
2450   if ((status == MagickTrue) && S_ISFIFO(image->blob->properties.st_mode))
2451     {
2452       image->blob->file_info.file=(FILE *) fopen_utf8(filename,type);
2453       if (image->blob->file_info.file == (FILE *) NULL)
2454         {
2455           ThrowFileException(exception,BlobError,"UnableToOpenBlob",filename);
2456           return(MagickFalse);
2457         }
2458       image->blob->type=FileStream;
2459       image->blob->exempt=MagickTrue;
2460       return(MagickTrue);
2461     }
2462 #endif
2463   GetPathComponent(image->filename,ExtensionPath,extension);
2464   if (*type == 'w')
2465     {
2466       (void) CopyMagickString(filename,image->filename,MaxTextExtent);
2467       if ((image_info->adjoin == MagickFalse) ||
2468           (strchr(filename,'%') != (char *) NULL))
2469         {
2470           /*
2471             Form filename for multi-part images.
2472           */
2473           (void) InterpretImageFilename(image_info,image,image->filename,(int)
2474             image->scene,filename,exception);
2475           if ((LocaleCompare(filename,image->filename) == 0) &&
2476               ((GetPreviousImageInList(image) != (Image *) NULL) ||
2477                (GetNextImageInList(image) != (Image *) NULL)))
2478             {
2479               char
2480                 path[MaxTextExtent];
2481
2482               GetPathComponent(image->filename,RootPath,path);
2483               if (*extension == '\0')
2484                 (void) FormatLocaleString(filename,MaxTextExtent,"%s-%.20g",
2485                   path,(double) image->scene);
2486               else
2487                 (void) FormatLocaleString(filename,MaxTextExtent,"%s-%.20g.%s",
2488                   path,(double) image->scene,extension);
2489             }
2490           (void) CopyMagickString(image->filename,filename,MaxTextExtent);
2491 #if defined(macintosh)
2492           SetApplicationType(filename,image_info->magick,'8BIM');
2493 #endif
2494         }
2495     }
2496   if (image_info->file != (FILE *) NULL)
2497     {
2498       image->blob->file_info.file=image_info->file;
2499       image->blob->type=FileStream;
2500       image->blob->exempt=MagickTrue;
2501     }
2502   else
2503     if (*type == 'r')
2504       {
2505         image->blob->file_info.file=(FILE *) fopen_utf8(filename,type);
2506         if (image->blob->file_info.file != (FILE *) NULL)
2507           {
2508             size_t
2509               count;
2510
2511             unsigned char
2512               magick[3];
2513
2514             image->blob->type=FileStream;
2515 #if defined(MAGICKCORE_HAVE_SETVBUF)
2516             (void) setvbuf(image->blob->file_info.file,(char *) NULL,
2517               (int) _IOFBF,16384);
2518 #endif
2519             (void) ResetMagickMemory(magick,0,sizeof(magick));
2520             count=fread(magick,1,sizeof(magick),image->blob->file_info.file);
2521             (void) rewind(image->blob->file_info.file);
2522             (void) LogMagickEvent(BlobEvent,GetMagickModule(),
2523                "  read %.20g magic header bytes",(double) count);
2524 #if defined(MAGICKCORE_ZLIB_DELEGATE)
2525             if (((int) magick[0] == 0x1F) && ((int) magick[1] == 0x8B) &&
2526                 ((int) magick[2] == 0x08))
2527               {
2528                 (void) fclose(image->blob->file_info.file);
2529                 image->blob->file_info.gzfile=gzopen(filename,type);
2530                 if (image->blob->file_info.gzfile != (gzFile) NULL)
2531                   image->blob->type=ZipStream;
2532                }
2533 #endif
2534 #if defined(MAGICKCORE_BZLIB_DELEGATE)
2535             if (strncmp((char *) magick,"BZh",3) == 0)
2536               {
2537                 (void) fclose(image->blob->file_info.file);
2538                 image->blob->file_info.bzfile=BZ2_bzopen(filename,type);
2539                 if (image->blob->file_info.bzfile != (BZFILE *) NULL)
2540                   image->blob->type=BZipStream;
2541               }
2542 #endif
2543             if (image->blob->type == FileStream)
2544               {
2545                 const MagickInfo
2546                   *magick_info;
2547
2548                 ExceptionInfo
2549                   *sans_exception;
2550
2551                 struct stat
2552                   *properties;
2553
2554                 sans_exception=AcquireExceptionInfo();
2555                 magick_info=GetMagickInfo(image_info->magick,sans_exception);
2556                 sans_exception=DestroyExceptionInfo(sans_exception);
2557                 properties=(&image->blob->properties);
2558                 if ((magick_info != (const MagickInfo *) NULL) &&
2559                     (GetMagickBlobSupport(magick_info) != MagickFalse) &&
2560                     (properties->st_size <= MagickMaxBufferExtent))
2561                   {
2562                     size_t
2563                       length;
2564
2565                     void
2566                       *blob;
2567
2568                     length=(size_t) properties->st_size;
2569                     blob=MapBlob(fileno(image->blob->file_info.file),ReadMode,
2570                       0,length);
2571                     if (blob != (void *) NULL)
2572                       {
2573                         /*
2574                           Format supports blobs-- use memory-mapped I/O.
2575                         */
2576                         if (image_info->file != (FILE *) NULL)
2577                           image->blob->exempt=MagickFalse;
2578                         else
2579                           {
2580                             (void) fclose(image->blob->file_info.file);
2581                             image->blob->file_info.file=(FILE *) NULL;
2582                           }
2583                         AttachBlob(image->blob,blob,length);
2584                         image->blob->mapped=MagickTrue;
2585                       }
2586                   }
2587               }
2588           }
2589         }
2590       else
2591 #if defined(MAGICKCORE_ZLIB_DELEGATE)
2592         if ((LocaleCompare(extension,"Z") == 0) ||
2593             (LocaleCompare(extension,"gz") == 0) ||
2594             (LocaleCompare(extension,"wmz") == 0) ||
2595             (LocaleCompare(extension,"svgz") == 0))
2596           {
2597             if (mode == WriteBinaryBlobMode)
2598               type="wb";
2599             image->blob->file_info.gzfile=gzopen(filename,type);
2600             if (image->blob->file_info.gzfile != (gzFile) NULL)
2601               image->blob->type=ZipStream;
2602           }
2603         else
2604 #endif
2605 #if defined(MAGICKCORE_BZLIB_DELEGATE)
2606           if (LocaleCompare(extension,"bz2") == 0)
2607             {
2608               image->blob->file_info.bzfile=BZ2_bzopen(filename,type);
2609               if (image->blob->file_info.bzfile != (BZFILE *) NULL)
2610                 image->blob->type=BZipStream;
2611             }
2612           else
2613 #endif
2614             {
2615               image->blob->file_info.file=(FILE *) fopen_utf8(filename,type);
2616               if (image->blob->file_info.file != (FILE *) NULL)
2617                 {
2618                   image->blob->type=FileStream;
2619 #if defined(MAGICKCORE_HAVE_SETVBUF)
2620                   (void) setvbuf(image->blob->file_info.file,(char *) NULL,(int) _IOFBF,
2621                     16384);
2622 #endif
2623                 }
2624        }
2625   image->blob->status=MagickFalse;
2626   if (image->blob->type != UndefinedStream)
2627     image->blob->size=GetBlobSize(image);
2628   else
2629     {
2630       ThrowFileException(exception,BlobError,"UnableToOpenBlob",filename);
2631       return(MagickFalse);
2632     }
2633   return(MagickTrue);
2634 }
2635 \f
2636 /*
2637 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2638 %                                                                             %
2639 %                                                                             %
2640 %                                                                             %
2641 +   P i n g B l o b                                                           %
2642 %                                                                             %
2643 %                                                                             %
2644 %                                                                             %
2645 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2646 %
2647 %  PingBlob() returns all the attributes of an image or image sequence except
2648 %  for the pixels.  It is much faster and consumes far less memory than
2649 %  BlobToImage().  On failure, a NULL image is returned and exception
2650 %  describes the reason for the failure.
2651 %
2652 %  The format of the PingBlob method is:
2653 %
2654 %      Image *PingBlob(const ImageInfo *image_info,const void *blob,
2655 %        const size_t length,ExceptionInfo *exception)
2656 %
2657 %  A description of each parameter follows:
2658 %
2659 %    o image_info: the image info.
2660 %
2661 %    o blob: the address of a character stream in one of the image formats
2662 %      understood by ImageMagick.
2663 %
2664 %    o length: This size_t integer reflects the length in bytes of the blob.
2665 %
2666 %    o exception: return any errors or warnings in this structure.
2667 %
2668 */
2669
2670 #if defined(__cplusplus) || defined(c_plusplus)
2671 extern "C" {
2672 #endif
2673
2674 static size_t PingStream(const Image *magick_unused(image),
2675   const void *magick_unused(pixels),const size_t columns)
2676 {
2677   return(columns);
2678 }
2679
2680 #if defined(__cplusplus) || defined(c_plusplus)
2681 }
2682 #endif
2683
2684 MagickExport Image *PingBlob(const ImageInfo *image_info,const void *blob,
2685   const size_t length,ExceptionInfo *exception)
2686 {
2687   Image
2688     *image;
2689
2690   ImageInfo
2691     *ping_info;
2692
2693   assert(image_info != (ImageInfo *) NULL);
2694   assert(image_info->signature == MagickSignature);
2695   if (image_info->debug != MagickFalse)
2696     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
2697       image_info->filename);
2698   assert(exception != (ExceptionInfo *) NULL);
2699   if ((blob == (const void *) NULL) || (length == 0))
2700     {
2701       (void) ThrowMagickException(exception,GetMagickModule(),BlobError,
2702         "UnrecognizedImageFormat","'%s'",image_info->magick);
2703       return((Image *) NULL);
2704     }
2705   ping_info=CloneImageInfo(image_info);
2706   ping_info->blob=(void *) AcquireQuantumMemory(length,sizeof(unsigned char));
2707   if (ping_info->blob == (const void *) NULL)
2708     {
2709       (void) ThrowMagickException(exception,GetMagickModule(),
2710         ResourceLimitFatalError,"MemoryAllocationFailed","'%s'","");
2711       return((Image *) NULL);
2712     }
2713   (void) memcpy(ping_info->blob,blob,length);
2714   ping_info->length=length;
2715   ping_info->ping=MagickTrue;
2716   image=ReadStream(ping_info,&PingStream,exception);
2717   ping_info->blob=(void *) RelinquishMagickMemory(ping_info->blob);
2718   ping_info=DestroyImageInfo(ping_info);
2719   return(image);
2720 }
2721 \f
2722 /*
2723 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2724 %                                                                             %
2725 %                                                                             %
2726 %                                                                             %
2727 +  R e a d B l o b                                                            %
2728 %                                                                             %
2729 %                                                                             %
2730 %                                                                             %
2731 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2732 %
2733 %  ReadBlob() reads data from the blob or image file and returns it.  It
2734 %  returns the number of bytes read.
2735 %
2736 %  The format of the ReadBlob method is:
2737 %
2738 %      ssize_t ReadBlob(Image *image,const size_t length,unsigned char *data)
2739 %
2740 %  A description of each parameter follows:
2741 %
2742 %    o image: the image.
2743 %
2744 %    o length:  Specifies an integer representing the number of bytes to read
2745 %      from the file.
2746 %
2747 %    o data:  Specifies an area to place the information requested from the
2748 %      file.
2749 %
2750 */
2751 MagickExport ssize_t ReadBlob(Image *image,const size_t length,
2752   unsigned char *data)
2753 {
2754   int
2755     c;
2756
2757   register unsigned char
2758     *q;
2759
2760   ssize_t
2761     count;
2762
2763   assert(image != (Image *) NULL);
2764   assert(image->signature == MagickSignature);
2765   assert(image->blob != (BlobInfo *) NULL);
2766   assert(image->blob->type != UndefinedStream);
2767   if (length == 0)
2768     return(0);
2769   assert(data != (void *) NULL);
2770   count=0;
2771   q=data;
2772   switch (image->blob->type)
2773   {
2774     case UndefinedStream:
2775       break;
2776     case StandardStream:
2777     {
2778       register ssize_t
2779         i;
2780
2781       count=0;
2782       for (i=0; i < (ssize_t) length; i+=count)
2783       {
2784         count=read(fileno(image->blob->file_info.file),q+i,(size_t) MagickMin(
2785           length-i,SSIZE_MAX));
2786         if (count > 0)
2787           continue;
2788         count=0;
2789         if (errno != EINTR)
2790           {
2791             i=0;
2792             break;
2793           }
2794       }
2795       count=i;
2796       break;
2797     }
2798     case FileStream:
2799     case PipeStream:
2800     {
2801       switch (length)
2802       {
2803         default:
2804         {
2805           count=(ssize_t) fread(q,1,length,image->blob->file_info.file);
2806           break;
2807         }
2808         case 2:
2809         {
2810           c=getc(image->blob->file_info.file);
2811           if (c == EOF)
2812             break;
2813           *q++=(unsigned char) c;
2814           count++;
2815         }
2816         case 1:
2817         {
2818           c=getc(image->blob->file_info.file);
2819           if (c == EOF)
2820             break;
2821           *q++=(unsigned char) c;
2822           count++;
2823         }
2824         case 0:
2825           break;
2826       }
2827       break;
2828     }
2829     case ZipStream:
2830     {
2831 #if defined(MAGICKCORE_ZLIB_DELEGATE)
2832       switch (length)
2833       {
2834         default:
2835         {
2836           count=(ssize_t) gzread(image->blob->file_info.gzfile,q,
2837             (unsigned int) length);
2838           break;
2839         }
2840         case 2:
2841         {
2842           c=gzgetc(image->blob->file_info.gzfile);
2843           if (c == EOF)
2844             break;
2845           *q++=(unsigned char) c;
2846           count++;
2847         }
2848         case 1:
2849         {
2850           c=gzgetc(image->blob->file_info.gzfile);
2851           if (c == EOF)
2852             break;
2853           *q++=(unsigned char) c;
2854           count++;
2855         }
2856         case 0:
2857           break;
2858       }
2859 #endif
2860       break;
2861     }
2862     case BZipStream:
2863     {
2864 #if defined(MAGICKCORE_BZLIB_DELEGATE)
2865       count=(ssize_t) BZ2_bzread(image->blob->file_info.bzfile,q,
2866         (int) length);
2867 #endif
2868       break;
2869     }
2870     case FifoStream:
2871       break;
2872     case BlobStream:
2873     {
2874       register const unsigned char
2875         *p;
2876
2877       if (image->blob->offset >= (MagickOffsetType) image->blob->length)
2878         {
2879           image->blob->eof=MagickTrue;
2880           break;
2881         }
2882       p=image->blob->data+image->blob->offset;
2883       count=(ssize_t) MagickMin(length,(MagickSizeType) (image->blob->length-
2884         image->blob->offset));
2885       image->blob->offset+=count;
2886       if (count != (ssize_t) length)
2887         image->blob->eof=MagickTrue;
2888       (void) memcpy(q,p,(size_t) count);
2889       break;
2890     }
2891   }
2892   return(count);
2893 }
2894 \f
2895 /*
2896 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2897 %                                                                             %
2898 %                                                                             %
2899 %                                                                             %
2900 +  R e a d B l o b B y t e                                                    %
2901 %                                                                             %
2902 %                                                                             %
2903 %                                                                             %
2904 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2905 %
2906 %  ReadBlobByte() reads a single byte from the image file and returns it.
2907 %
2908 %  The format of the ReadBlobByte method is:
2909 %
2910 %      int ReadBlobByte(Image *image)
2911 %
2912 %  A description of each parameter follows.
2913 %
2914 %    o image: the image.
2915 %
2916 */
2917 MagickExport int ReadBlobByte(Image *image)
2918 {
2919   register const unsigned char
2920     *p;
2921
2922   ssize_t
2923     count;
2924
2925   unsigned char
2926     buffer[1];
2927
2928   assert(image != (Image *) NULL);
2929   assert(image->signature == MagickSignature);
2930   p=ReadBlobStream(image,1,buffer,&count);
2931   if (count != 1)
2932     return(EOF);
2933   return((int) (*p));
2934 }
2935 \f
2936 /*
2937 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2938 %                                                                             %
2939 %                                                                             %
2940 %                                                                             %
2941 +  R e a d B l o b D o u b l e                                                %
2942 %                                                                             %
2943 %                                                                             %
2944 %                                                                             %
2945 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2946 %
2947 %  ReadBlobDouble() reads a double value as a 64-bit quantity in the byte-order
2948 %  specified by the endian member of the image structure.
2949 %
2950 %  The format of the ReadBlobDouble method is:
2951 %
2952 %      double ReadBlobDouble(Image *image)
2953 %
2954 %  A description of each parameter follows.
2955 %
2956 %    o image: the image.
2957 %
2958 */
2959 MagickExport double ReadBlobDouble(Image *image)
2960 {
2961   union
2962   {
2963     MagickSizeType
2964       unsigned_value;
2965
2966     double
2967       double_value;
2968   } quantum;
2969
2970   quantum.double_value=0.0;
2971   quantum.unsigned_value=ReadBlobLongLong(image);
2972   return(quantum.double_value);
2973 }
2974 \f
2975 /*
2976 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2977 %                                                                             %
2978 %                                                                             %
2979 %                                                                             %
2980 +  R e a d B l o b F l o a t                                                  %
2981 %                                                                             %
2982 %                                                                             %
2983 %                                                                             %
2984 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2985 %
2986 %  ReadBlobFloat() reads a float value as a 32-bit quantity in the byte-order
2987 %  specified by the endian member of the image structure.
2988 %
2989 %  The format of the ReadBlobFloat method is:
2990 %
2991 %      float ReadBlobFloat(Image *image)
2992 %
2993 %  A description of each parameter follows.
2994 %
2995 %    o image: the image.
2996 %
2997 */
2998 MagickExport float ReadBlobFloat(Image *image)
2999 {
3000   union
3001   {
3002     unsigned int
3003       unsigned_value;
3004
3005     float
3006       float_value;
3007   } quantum;
3008
3009   quantum.float_value=0.0;
3010   quantum.unsigned_value=ReadBlobLong(image);
3011   return(quantum.float_value);
3012 }
3013 \f
3014 /*
3015 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3016 %                                                                             %
3017 %                                                                             %
3018 %                                                                             %
3019 +  R e a d B l o b L o n g                                                    %
3020 %                                                                             %
3021 %                                                                             %
3022 %                                                                             %
3023 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3024 %
3025 %  ReadBlobLong() reads a ssize_t value as a 32-bit quantity in the byte-order
3026 %  specified by the endian member of the image structure.
3027 %
3028 %  The format of the ReadBlobLong method is:
3029 %
3030 %      unsigned int ReadBlobLong(Image *image)
3031 %
3032 %  A description of each parameter follows.
3033 %
3034 %    o image: the image.
3035 %
3036 */
3037 MagickExport unsigned int ReadBlobLong(Image *image)
3038 {
3039   register const unsigned char
3040     *p;
3041
3042   ssize_t
3043     count;
3044
3045   unsigned char
3046     buffer[4];
3047
3048   unsigned int
3049     value;
3050
3051   assert(image != (Image *) NULL);
3052   assert(image->signature == MagickSignature);
3053   *buffer='\0';
3054   p=ReadBlobStream(image,4,buffer,&count);
3055   if (count != 4)
3056     return(0UL);
3057   if (image->endian == LSBEndian)
3058     {
3059       value=(unsigned int) (*p++);
3060       value|=((unsigned int) (*p++)) << 8;
3061       value|=((unsigned int) (*p++)) << 16;
3062       value|=((unsigned int) (*p++)) << 24;
3063       return(value);
3064     }
3065   value=((unsigned int) (*p++)) << 24;
3066   value|=((unsigned int) (*p++)) << 16;
3067   value|=((unsigned int) (*p++)) << 8;
3068   value|=((unsigned int) (*p++));
3069   return(value);
3070 }
3071 \f
3072 /*
3073 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3074 %                                                                             %
3075 %                                                                             %
3076 %                                                                             %
3077 +  R e a d B l o b L o n g L o n g                                            %
3078 %                                                                             %
3079 %                                                                             %
3080 %                                                                             %
3081 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3082 %
3083 %  ReadBlobLongLong() reads a long long value as a 64-bit quantity in the
3084 %  byte-order specified by the endian member of the image structure.
3085 %
3086 %  The format of the ReadBlobLongLong method is:
3087 %
3088 %      MagickSizeType ReadBlobLongLong(Image *image)
3089 %
3090 %  A description of each parameter follows.
3091 %
3092 %    o image: the image.
3093 %
3094 */
3095 MagickExport MagickSizeType ReadBlobLongLong(Image *image)
3096 {
3097   MagickSizeType
3098     value;
3099
3100   register const unsigned char
3101     *p;
3102
3103   ssize_t
3104     count;
3105
3106   unsigned char
3107     buffer[8];
3108
3109   assert(image != (Image *) NULL);
3110   assert(image->signature == MagickSignature);
3111   *buffer='\0';
3112   p=ReadBlobStream(image,8,buffer,&count);
3113   if (count != 8)
3114     return(MagickULLConstant(0));
3115   if (image->endian == LSBEndian)
3116     {
3117       value=(MagickSizeType) (*p++);
3118       value|=((MagickSizeType) (*p++)) << 8;
3119       value|=((MagickSizeType) (*p++)) << 16;
3120       value|=((MagickSizeType) (*p++)) << 24;
3121       value|=((MagickSizeType) (*p++)) << 32;
3122       value|=((MagickSizeType) (*p++)) << 40;
3123       value|=((MagickSizeType) (*p++)) << 48;
3124       value|=((MagickSizeType) (*p++)) << 56;
3125       return(value & MagickULLConstant(0xffffffffffffffff));
3126     }
3127   value=((MagickSizeType) (*p++)) << 56;
3128   value|=((MagickSizeType) (*p++)) << 48;
3129   value|=((MagickSizeType) (*p++)) << 40;
3130   value|=((MagickSizeType) (*p++)) << 32;
3131   value|=((MagickSizeType) (*p++)) << 24;
3132   value|=((MagickSizeType) (*p++)) << 16;
3133   value|=((MagickSizeType) (*p++)) << 8;
3134   value|=((MagickSizeType) (*p++));
3135   return(value & MagickULLConstant(0xffffffffffffffff));
3136 }
3137 \f
3138 /*
3139 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3140 %                                                                             %
3141 %                                                                             %
3142 %                                                                             %
3143 +  R e a d B l o b S h o r t                                                  %
3144 %                                                                             %
3145 %                                                                             %
3146 %                                                                             %
3147 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3148 %
3149 %  ReadBlobShort() reads a short value as a 16-bit quantity in the byte-order
3150 %  specified by the endian member of the image structure.
3151 %
3152 %  The format of the ReadBlobShort method is:
3153 %
3154 %      unsigned short ReadBlobShort(Image *image)
3155 %
3156 %  A description of each parameter follows.
3157 %
3158 %    o image: the image.
3159 %
3160 */
3161 MagickExport unsigned short ReadBlobShort(Image *image)
3162 {
3163   register const unsigned char
3164     *p;
3165
3166   register unsigned int
3167     value;
3168
3169   ssize_t
3170     count;
3171
3172   unsigned char
3173     buffer[2];
3174
3175   assert(image != (Image *) NULL);
3176   assert(image->signature == MagickSignature);
3177   *buffer='\0';
3178   p=ReadBlobStream(image,2,buffer,&count);
3179   if (count != 2)
3180     return((unsigned short) 0U);
3181   if (image->endian == LSBEndian)
3182     {
3183       value=(unsigned int) (*p++);
3184       value|=((unsigned int) (*p++)) << 8;
3185       return((unsigned short) (value & 0xffff));
3186     }
3187   value=(unsigned int) ((*p++) << 8);
3188   value|=(unsigned int) (*p++);
3189   return((unsigned short) (value & 0xffff));
3190 }
3191 \f
3192 /*
3193 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3194 %                                                                             %
3195 %                                                                             %
3196 %                                                                             %
3197 +  R e a d B l o b L S B L o n g                                              %
3198 %                                                                             %
3199 %                                                                             %
3200 %                                                                             %
3201 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3202 %
3203 %  ReadBlobLSBLong() reads a ssize_t value as a 32-bit quantity in
3204 %  least-significant byte first order.
3205 %
3206 %  The format of the ReadBlobLSBLong method is:
3207 %
3208 %      unsigned int ReadBlobLSBLong(Image *image)
3209 %
3210 %  A description of each parameter follows.
3211 %
3212 %    o image: the image.
3213 %
3214 */
3215 MagickExport unsigned int ReadBlobLSBLong(Image *image)
3216 {
3217   register const unsigned char
3218     *p;
3219
3220   register unsigned int
3221     value;
3222
3223   ssize_t
3224     count;
3225
3226   unsigned char
3227     buffer[4];
3228
3229   assert(image != (Image *) NULL);
3230   assert(image->signature == MagickSignature);
3231   *buffer='\0';
3232   p=ReadBlobStream(image,4,buffer,&count);
3233   if (count != 4)
3234     return(0U);
3235   value=(unsigned int) (*p++);
3236   value|=((unsigned int) (*p++)) << 8;
3237   value|=((unsigned int) (*p++)) << 16;
3238   value|=((unsigned int) (*p++)) << 24;
3239   return(value);
3240 }
3241 \f
3242 /*
3243 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3244 %                                                                             %
3245 %                                                                             %
3246 %                                                                             %
3247 +  R e a d B l o b L S B S h o r t                                            %
3248 %                                                                             %
3249 %                                                                             %
3250 %                                                                             %
3251 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3252 %
3253 %  ReadBlobLSBShort() reads a short value as a 16-bit quantity in
3254 %  least-significant byte first order.
3255 %
3256 %  The format of the ReadBlobLSBShort method is:
3257 %
3258 %      unsigned short ReadBlobLSBShort(Image *image)
3259 %
3260 %  A description of each parameter follows.
3261 %
3262 %    o image: the image.
3263 %
3264 */
3265 MagickExport unsigned short ReadBlobLSBShort(Image *image)
3266 {
3267   register const unsigned char
3268     *p;
3269
3270   register unsigned int
3271     value;
3272
3273   ssize_t
3274     count;
3275
3276   unsigned char
3277     buffer[2];
3278
3279   assert(image != (Image *) NULL);
3280   assert(image->signature == MagickSignature);
3281   *buffer='\0';
3282   p=ReadBlobStream(image,2,buffer,&count);
3283   if (count != 2)
3284     return((unsigned short) 0U);
3285   value=(unsigned int) (*p++);
3286   value|=((unsigned int) ((*p++)) << 8);
3287   return((unsigned short) (value & 0xffff));
3288 }
3289 \f
3290 /*
3291 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3292 %                                                                             %
3293 %                                                                             %
3294 %                                                                             %
3295 +  R e a d B l o b M S B L o n g                                              %
3296 %                                                                             %
3297 %                                                                             %
3298 %                                                                             %
3299 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3300 %
3301 %  ReadBlobMSBLong() reads a ssize_t value as a 32-bit quantity in
3302 %  most-significant byte first order.
3303 %
3304 %  The format of the ReadBlobMSBLong method is:
3305 %
3306 %      unsigned int ReadBlobMSBLong(Image *image)
3307 %
3308 %  A description of each parameter follows.
3309 %
3310 %    o image: the image.
3311 %
3312 */
3313 MagickExport unsigned int ReadBlobMSBLong(Image *image)
3314 {
3315   register const unsigned char
3316     *p;
3317
3318   register unsigned int
3319     value;
3320
3321   ssize_t
3322     count;
3323
3324   unsigned char
3325     buffer[4];
3326
3327   assert(image != (Image *) NULL);
3328   assert(image->signature == MagickSignature);
3329   *buffer='\0';
3330   p=ReadBlobStream(image,4,buffer,&count);
3331   if (count != 4)
3332     return(0UL);
3333   value=((unsigned int) (*p++) << 24);
3334   value|=((unsigned int) (*p++) << 16);
3335   value|=((unsigned int) (*p++) << 8);
3336   value|=(unsigned int) (*p++);
3337   return(value);
3338 }
3339 \f
3340 /*
3341 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3342 %                                                                             %
3343 %                                                                             %
3344 %                                                                             %
3345 +  R e a d B l o b M S B L o n g L o n g                                      %
3346 %                                                                             %
3347 %                                                                             %
3348 %                                                                             %
3349 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3350 %
3351 %  ReadBlobMSBLongLong() reads a ssize_t value as a 64-bit quantity in
3352 %  most-significant byte first order.
3353 %
3354 %  The format of the ReadBlobMSBLongLong method is:
3355 %
3356 %      unsigned int ReadBlobMSBLongLong(Image *image)
3357 %
3358 %  A description of each parameter follows.
3359 %
3360 %    o image: the image.
3361 %
3362 */
3363 MagickExport MagickSizeType ReadBlobMSBLongLong(Image *image)
3364 {
3365   register const unsigned char
3366     *p;
3367
3368   register MagickSizeType
3369     value;
3370
3371   ssize_t
3372     count;
3373
3374   unsigned char
3375     buffer[8];
3376
3377   assert(image != (Image *) NULL);
3378   assert(image->signature == MagickSignature);
3379   *buffer='\0';
3380   p=ReadBlobStream(image,8,buffer,&count);
3381   if (count != 8)
3382     return(MagickULLConstant(0));
3383   value=((MagickSizeType) (*p++)) << 56;
3384   value|=((MagickSizeType) (*p++)) << 48;
3385   value|=((MagickSizeType) (*p++)) << 40;
3386   value|=((MagickSizeType) (*p++)) << 32;
3387   value|=((MagickSizeType) (*p++)) << 24;
3388   value|=((MagickSizeType) (*p++)) << 16;
3389   value|=((MagickSizeType) (*p++)) << 8;
3390   value|=((MagickSizeType) (*p++));
3391   return(value & MagickULLConstant(0xffffffffffffffff));
3392 }
3393 \f
3394 /*
3395 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3396 %                                                                             %
3397 %                                                                             %
3398 %                                                                             %
3399 +  R e a d B l o b M S B S h o r t                                            %
3400 %                                                                             %
3401 %                                                                             %
3402 %                                                                             %
3403 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3404 %
3405 %  ReadBlobMSBShort() reads a short value as a 16-bit quantity in
3406 %  most-significant byte first order.
3407 %
3408 %  The format of the ReadBlobMSBShort method is:
3409 %
3410 %      unsigned short ReadBlobMSBShort(Image *image)
3411 %
3412 %  A description of each parameter follows.
3413 %
3414 %    o image: the image.
3415 %
3416 */
3417 MagickExport unsigned short ReadBlobMSBShort(Image *image)
3418 {
3419   register const unsigned char
3420     *p;
3421
3422   register unsigned int
3423     value;
3424
3425   ssize_t
3426     count;
3427
3428   unsigned char
3429     buffer[2];
3430
3431   assert(image != (Image *) NULL);
3432   assert(image->signature == MagickSignature);
3433   *buffer='\0';
3434   p=ReadBlobStream(image,2,buffer,&count);
3435   if (count != 2)
3436     return((unsigned short) 0U);
3437   value=(unsigned int) ((*p++) << 8);
3438   value|=(unsigned int) (*p++);
3439   return((unsigned short) (value & 0xffff));
3440 }
3441 \f
3442 /*
3443 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3444 %                                                                             %
3445 %                                                                             %
3446 %                                                                             %
3447 +   R e a d B l o b S t r i n g                                               %
3448 %                                                                             %
3449 %                                                                             %
3450 %                                                                             %
3451 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3452 %
3453 %  ReadBlobString() reads characters from a blob or file until a newline
3454 %  character is read or an end-of-file condition is encountered.
3455 %
3456 %  The format of the ReadBlobString method is:
3457 %
3458 %      char *ReadBlobString(Image *image,char *string)
3459 %
3460 %  A description of each parameter follows:
3461 %
3462 %    o image: the image.
3463 %
3464 %    o string: the address of a character buffer.
3465 %
3466 */
3467 MagickExport char *ReadBlobString(Image *image,char *string)
3468 {
3469   register const unsigned char
3470     *p;
3471
3472   register ssize_t
3473     i;
3474
3475   ssize_t
3476     count;
3477
3478   unsigned char
3479     buffer[1];
3480
3481   assert(image != (Image *) NULL);
3482   assert(image->signature == MagickSignature);
3483   for (i=0; i < (MaxTextExtent-1L); i++)
3484   {
3485     p=ReadBlobStream(image,1,buffer,&count);
3486     if (count != 1)
3487       {
3488         if (i == 0)
3489           return((char *) NULL);
3490         break;
3491       }
3492     string[i]=(char) (*p);
3493     if ((string[i] == '\r') || (string[i] == '\n'))
3494       break;
3495   }
3496   if (string[i] == '\r')
3497     (void) ReadBlobStream(image,1,buffer,&count);
3498   string[i]='\0';
3499   return(string);
3500 }
3501 \f
3502 /*
3503 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3504 %                                                                             %
3505 %                                                                             %
3506 %                                                                             %
3507 +   R e f e r e n c e B l o b                                                 %
3508 %                                                                             %
3509 %                                                                             %
3510 %                                                                             %
3511 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3512 %
3513 %  ReferenceBlob() increments the reference count associated with the pixel
3514 %  blob returning a pointer to the blob.
3515 %
3516 %  The format of the ReferenceBlob method is:
3517 %
3518 %      BlobInfo ReferenceBlob(BlobInfo *blob_info)
3519 %
3520 %  A description of each parameter follows:
3521 %
3522 %    o blob_info: the blob_info.
3523 %
3524 */
3525 MagickExport BlobInfo *ReferenceBlob(BlobInfo *blob)
3526 {
3527   assert(blob != (BlobInfo *) NULL);
3528   assert(blob->signature == MagickSignature);
3529   if (blob->debug != MagickFalse)
3530     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
3531   LockSemaphoreInfo(blob->semaphore);
3532   blob->reference_count++;
3533   UnlockSemaphoreInfo(blob->semaphore);
3534   return(blob);
3535 }
3536 \f
3537 /*
3538 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3539 %                                                                             %
3540 %                                                                             %
3541 %                                                                             %
3542 +  S e e k B l o b                                                            %
3543 %                                                                             %
3544 %                                                                             %
3545 %                                                                             %
3546 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3547 %
3548 %  SeekBlob() sets the offset in bytes from the beginning of a blob or file
3549 %  and returns the resulting offset.
3550 %
3551 %  The format of the SeekBlob method is:
3552 %
3553 %      MagickOffsetType SeekBlob(Image *image,const MagickOffsetType offset,
3554 %        const int whence)
3555 %
3556 %  A description of each parameter follows:
3557 %
3558 %    o image: the image.
3559 %
3560 %    o offset:  Specifies an integer representing the offset in bytes.
3561 %
3562 %    o whence:  Specifies an integer representing how the offset is
3563 %      treated relative to the beginning of the blob as follows:
3564 %
3565 %        SEEK_SET  Set position equal to offset bytes.
3566 %        SEEK_CUR  Set position to current location plus offset.
3567 %        SEEK_END  Set position to EOF plus offset.
3568 %
3569 */
3570 MagickExport MagickOffsetType SeekBlob(Image *image,
3571   const MagickOffsetType offset,const int whence)
3572 {
3573   assert(image != (Image *) NULL);
3574   assert(image->signature == MagickSignature);
3575   if (image->debug != MagickFalse)
3576     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3577   assert(image->blob != (BlobInfo *) NULL);
3578   assert(image->blob->type != UndefinedStream);
3579   switch (image->blob->type)
3580   {
3581     case UndefinedStream:
3582       break;
3583     case StandardStream:
3584       return(-1);
3585     case FileStream:
3586     {
3587       if (fseek(image->blob->file_info.file,offset,whence) < 0)
3588         return(-1);
3589       image->blob->offset=TellBlob(image);
3590       break;
3591     }
3592     case PipeStream:
3593     case ZipStream:
3594     {
3595 #if defined(MAGICKCORE_ZLIB_DELEGATE)
3596       if (gzseek(image->blob->file_info.gzfile,(off_t) offset,whence) < 0)
3597         return(-1);
3598 #endif
3599       image->blob->offset=TellBlob(image);
3600       break;
3601     }
3602     case BZipStream:
3603       return(-1);
3604     case FifoStream:
3605       return(-1);
3606     case BlobStream:
3607     {
3608       switch (whence)
3609       {
3610         case SEEK_SET:
3611         default:
3612         {
3613           if (offset < 0)
3614             return(-1);
3615           image->blob->offset=offset;
3616           break;
3617         }
3618         case SEEK_CUR:
3619         {
3620           if ((image->blob->offset+offset) < 0)
3621             return(-1);
3622           image->blob->offset+=offset;
3623           break;
3624         }
3625         case SEEK_END:
3626         {
3627           if (((MagickOffsetType) image->blob->length+offset) < 0)
3628             return(-1);
3629           image->blob->offset=image->blob->length+offset;
3630           break;
3631         }
3632       }
3633       if (image->blob->offset <= (MagickOffsetType)
3634           ((off_t) image->blob->length))
3635         image->blob->eof=MagickFalse;
3636       else
3637         if (image->blob->mapped != MagickFalse)
3638           return(-1);
3639         else
3640           {
3641             image->blob->extent=(size_t) (image->blob->offset+
3642               image->blob->quantum);
3643             image->blob->data=(unsigned char *) ResizeQuantumMemory(
3644               image->blob->data,image->blob->extent+1,
3645               sizeof(*image->blob->data));
3646             (void) SyncBlob(image);
3647             if (image->blob->data == (unsigned char *) NULL)
3648               {
3649                 (void) DetachBlob(image->blob);
3650                 return(-1);
3651               }
3652           }
3653       break;
3654     }
3655   }
3656   return(image->blob->offset);
3657 }
3658 \f
3659 /*
3660 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3661 %                                                                             %
3662 %                                                                             %
3663 %                                                                             %
3664 +   S e t B l o b E x e m p t                                                 %
3665 %                                                                             %
3666 %                                                                             %
3667 %                                                                             %
3668 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3669 %
3670 %  SetBlobExempt() sets the blob exempt status.
3671 %
3672 %  The format of the SetBlobExempt method is:
3673 %
3674 %      MagickBooleanType SetBlobExempt(const Image *image,
3675 %        const MagickBooleanType exempt)
3676 %
3677 %  A description of each parameter follows:
3678 %
3679 %    o image: the image.
3680 %
3681 %    o exempt: Set to true if this blob is exempt from being closed.
3682 %
3683 */
3684 MagickPrivate void SetBlobExempt(Image *image,const MagickBooleanType exempt)
3685 {
3686   assert(image != (const Image *) NULL);
3687   assert(image->signature == MagickSignature);
3688   if (image->debug != MagickFalse)
3689     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3690   image->blob->exempt=exempt;
3691 }
3692 \f
3693 /*
3694 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3695 %                                                                             %
3696 %                                                                             %
3697 %                                                                             %
3698 +  S e t B l o b E x t e n t                                                  %
3699 %                                                                             %
3700 %                                                                             %
3701 %                                                                             %
3702 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3703 %
3704 %  SetBlobExtent() ensures enough space is allocated for the blob.  If the
3705 %  method is successful, subsequent writes to bytes in the specified range are
3706 %  guaranteed not to fail.
3707 %
3708 %  The format of the SetBlobExtent method is:
3709 %
3710 %      MagickBooleanType SetBlobExtent(Image *image,const MagickSizeType extent)
3711 %
3712 %  A description of each parameter follows:
3713 %
3714 %    o image: the image.
3715 %
3716 %    o extent:  the blob maximum extent.
3717 %
3718 */
3719 MagickPrivate MagickBooleanType SetBlobExtent(Image *image,
3720   const MagickSizeType extent)
3721 {
3722   assert(image != (Image *) NULL);
3723   assert(image->signature == MagickSignature);
3724   if (image->debug != MagickFalse)
3725     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3726   assert(image->blob != (BlobInfo *) NULL);
3727   assert(image->blob->type != UndefinedStream);
3728   switch (image->blob->type)
3729   {
3730     case UndefinedStream:
3731       break;
3732     case StandardStream:
3733       return(MagickFalse);
3734     case FileStream:
3735     {
3736       if (extent != (MagickSizeType) ((off_t) extent))
3737         return(MagickFalse);
3738 #if !defined(MAGICKCORE_HAVE_POSIX_FALLOCATE)
3739         return(MagickFalse);
3740 #else
3741       {
3742         int
3743           status;
3744
3745         MagickOffsetType
3746           offset;
3747
3748         offset=TellBlob(image);
3749         status=posix_fallocate(fileno(image->blob->file_info.file),offset,
3750           extent-offset);
3751         if (status != 0)
3752           return(MagickFalse);
3753       }
3754 #endif
3755       break;
3756     }
3757     case PipeStream:
3758     case ZipStream:
3759       return(MagickFalse);
3760     case BZipStream:
3761       return(MagickFalse);
3762     case FifoStream:
3763       return(MagickFalse);
3764     case BlobStream:
3765     {
3766       if (image->blob->mapped != MagickFalse)
3767         {
3768           if (image->blob->file_info.file == (FILE *) NULL)
3769             return(MagickFalse);
3770           (void) UnmapBlob(image->blob->data,image->blob->length);
3771 #if !defined(MAGICKCORE_HAVE_POSIX_FALLOCATE)
3772           return(MagickFalse);
3773 #else
3774           {
3775             int
3776               status;
3777
3778             MagickOffsetType
3779               offset;
3780
3781             offset=TellBlob(image);
3782             status=posix_fallocate(fileno(image->blob->file_info.file),offset,
3783               extent-offset);
3784             if (status != 0)
3785               return(MagickFalse);
3786           }
3787           image->blob->data=(unsigned char*) MapBlob(fileno(
3788             image->blob->file_info.file),WriteMode,0,(size_t) extent);
3789           image->blob->extent=(size_t) extent;
3790           image->blob->length=(size_t) extent;
3791           (void) SyncBlob(image);
3792           break;
3793 #endif
3794         }
3795       if (extent != (MagickSizeType) ((size_t) extent))
3796         return(MagickFalse);
3797       image->blob->extent=(size_t) extent;
3798       image->blob->data=(unsigned char *) ResizeQuantumMemory(image->blob->data,
3799         image->blob->extent+1,sizeof(*image->blob->data));
3800       (void) SyncBlob(image);
3801       if (image->blob->data == (unsigned char *) NULL)
3802         {
3803           (void) DetachBlob(image->blob);
3804           return(MagickFalse);
3805         }
3806       break;
3807     }
3808   }
3809   return(MagickTrue);
3810 }
3811 \f
3812 /*
3813 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3814 %                                                                             %
3815 %                                                                             %
3816 %                                                                             %
3817 +  S y n c B l o b                                                            %
3818 %                                                                             %
3819 %                                                                             %
3820 %                                                                             %
3821 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3822 %
3823 %  SyncBlob() flushes the datastream if it is a file or synchronizes the data
3824 %  attributes if it is an blob.
3825 %
3826 %  The format of the SyncBlob method is:
3827 %
3828 %      int SyncBlob(Image *image)
3829 %
3830 %  A description of each parameter follows:
3831 %
3832 %    o image: the image.
3833 %
3834 */
3835 static int SyncBlob(Image *image)
3836 {
3837   int
3838     status;
3839
3840   assert(image != (Image *) NULL);
3841   assert(image->signature == MagickSignature);
3842   if (image->debug != MagickFalse)
3843     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3844   assert(image->blob != (BlobInfo *) NULL);
3845   assert(image->blob->type != UndefinedStream);
3846   status=0;
3847   switch (image->blob->type)
3848   {
3849     case UndefinedStream:
3850     case StandardStream:
3851       break;
3852     case FileStream:
3853     case PipeStream:
3854     {
3855       status=fflush(image->blob->file_info.file);
3856       break;
3857     }
3858     case ZipStream:
3859     {
3860 #if defined(MAGICKCORE_ZLIB_DELEGATE)
3861       status=gzflush(image->blob->file_info.gzfile,Z_SYNC_FLUSH);
3862 #endif
3863       break;
3864     }
3865     case BZipStream:
3866     {
3867 #if defined(MAGICKCORE_BZLIB_DELEGATE)
3868       status=BZ2_bzflush(image->blob->file_info.bzfile);
3869 #endif
3870       break;
3871     }
3872     case FifoStream:
3873       break;
3874     case BlobStream:
3875     {
3876 #if defined(MAGICKCORE_HAVE_MMAP_FILEIO)
3877       if (image->blob->mapped != MagickFalse)
3878         status=msync(image->blob->data,image->blob->length,MS_SYNC);
3879 #endif
3880       break;
3881     }
3882   }
3883   return(status);
3884 }
3885 \f
3886 /*
3887 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3888 %                                                                             %
3889 %                                                                             %
3890 %                                                                             %
3891 +  T e l l B l o b                                                            %
3892 %                                                                             %
3893 %                                                                             %
3894 %                                                                             %
3895 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3896 %
3897 %  TellBlob() obtains the current value of the blob or file position.
3898 %
3899 %  The format of the TellBlob method is:
3900 %
3901 %      MagickOffsetType TellBlob(const Image *image)
3902 %
3903 %  A description of each parameter follows:
3904 %
3905 %    o image: the image.
3906 %
3907 */
3908 MagickExport MagickOffsetType TellBlob(const Image *image)
3909 {
3910   MagickOffsetType
3911     offset;
3912
3913   assert(image != (Image *) NULL);
3914   assert(image->signature == MagickSignature);
3915   if (image->debug != MagickFalse)
3916     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3917   assert(image->blob != (BlobInfo *) NULL);
3918   assert(image->blob->type != UndefinedStream);
3919   offset=(-1);
3920   switch (image->blob->type)
3921   {
3922     case UndefinedStream:
3923     case StandardStream:
3924       break;
3925     case FileStream:
3926     {
3927       offset=ftell(image->blob->file_info.file);
3928       break;
3929     }
3930     case PipeStream:
3931       break;
3932     case ZipStream:
3933     {
3934 #if defined(MAGICKCORE_ZLIB_DELEGATE)
3935       offset=(MagickOffsetType) gztell(image->blob->file_info.gzfile);
3936 #endif
3937       break;
3938     }
3939     case BZipStream:
3940       break;
3941     case FifoStream:
3942       break;
3943     case BlobStream:
3944     {
3945       offset=image->blob->offset;
3946       break;
3947     }
3948   }
3949   return(offset);
3950 }
3951 \f
3952 /*
3953 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3954 %                                                                             %
3955 %                                                                             %
3956 %                                                                             %
3957 +  U n m a p B l o b                                                          %
3958 %                                                                             %
3959 %                                                                             %
3960 %                                                                             %
3961 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3962 %
3963 %  UnmapBlob() deallocates the binary large object previously allocated with
3964 %  the MapBlob method.
3965 %
3966 %  The format of the UnmapBlob method is:
3967 %
3968 %       MagickBooleanType UnmapBlob(void *map,const size_t length)
3969 %
3970 %  A description of each parameter follows:
3971 %
3972 %    o map: the address  of the binary large object.
3973 %
3974 %    o length: the length of the binary large object.
3975 %
3976 */
3977 MagickExport MagickBooleanType UnmapBlob(void *map,const size_t length)
3978 {
3979 #if defined(MAGICKCORE_HAVE_MMAP_FILEIO)
3980   int
3981     status;
3982
3983   status=munmap(map,length);
3984   return(status == -1 ? MagickFalse : MagickTrue);
3985 #else
3986   (void) map;
3987   (void) length;
3988   return(MagickFalse);
3989 #endif
3990 }
3991 \f
3992 /*
3993 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3994 %                                                                             %
3995 %                                                                             %
3996 %                                                                             %
3997 +  W r i t e B l o b                                                          %
3998 %                                                                             %
3999 %                                                                             %
4000 %                                                                             %
4001 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4002 %
4003 %  WriteBlob() writes data to a blob or image file.  It returns the number of
4004 %  bytes written.
4005 %
4006 %  The format of the WriteBlob method is:
4007 %
4008 %      ssize_t WriteBlob(Image *image,const size_t length,
4009 %        const unsigned char *data)
4010 %
4011 %  A description of each parameter follows:
4012 %
4013 %    o image: the image.
4014 %
4015 %    o length:  Specifies an integer representing the number of bytes to
4016 %      write to the file.
4017 %
4018 %    o data:  The address of the data to write to the blob or file.
4019 %
4020 */
4021 MagickExport ssize_t WriteBlob(Image *image,const size_t length,
4022   const unsigned char *data)
4023 {
4024   int
4025     c;
4026
4027   register const unsigned char
4028     *p;
4029
4030   ssize_t
4031     count;
4032
4033   assert(image != (Image *) NULL);
4034   assert(image->signature == MagickSignature);
4035   assert(data != (const unsigned char *) NULL);
4036   assert(image->blob != (BlobInfo *) NULL);
4037   assert(image->blob->type != UndefinedStream);
4038   if (length == 0)
4039     return(0);
4040   count=0;
4041   p=data;
4042   switch (image->blob->type)
4043   {
4044     case UndefinedStream:
4045       break;
4046     case StandardStream:
4047     {
4048       register ssize_t
4049         i;
4050
4051       count=0;
4052       for (i=0; i < (MagickOffsetType) length; i+=count)
4053       {
4054         count=write(fileno(image->blob->file_info.file),data+i,(size_t)
4055           MagickMin(length-i,SSIZE_MAX));
4056         if (count > 0)
4057           continue;
4058         count=0;
4059         if (errno != EINTR)
4060           {
4061             i=0;
4062             break;
4063           }
4064       }
4065       count=i;
4066       break;
4067     }
4068     case FileStream:
4069     case PipeStream:
4070     {
4071       switch (length)
4072       {
4073         default:
4074         {
4075           count=(ssize_t) fwrite((const char *) data,1,length,
4076             image->blob->file_info.file);
4077           break;
4078         }
4079         case 2:
4080         {
4081           c=putc((int) *p++,image->blob->file_info.file);
4082           if (c == EOF)
4083             break;
4084           count++;
4085         }
4086         case 1:
4087         {
4088           c=putc((int) *p++,image->blob->file_info.file);
4089           if (c == EOF)
4090             break;
4091           count++;
4092         }
4093         case 0:
4094           break;
4095       }
4096       break;
4097     }
4098     case ZipStream:
4099     {
4100 #if defined(MAGICKCORE_ZLIB_DELEGATE)
4101       switch (length)
4102       {
4103         default:
4104         {
4105           count=(ssize_t) gzwrite(image->blob->file_info.gzfile,(void *) data,
4106             (unsigned int) length);
4107           break;
4108         }
4109         case 2:
4110         {
4111           c=gzputc(image->blob->file_info.gzfile,(int) *p++);
4112           if (c == EOF)
4113             break;
4114           count++;
4115         }
4116         case 1:
4117         {
4118           c=gzputc(image->blob->file_info.gzfile,(int) *p++);
4119           if (c == EOF)
4120             break;
4121           count++;
4122         }
4123         case 0:
4124           break;
4125       }
4126 #endif
4127       break;
4128     }
4129     case BZipStream:
4130     {
4131 #if defined(MAGICKCORE_BZLIB_DELEGATE)
4132       count=(ssize_t) BZ2_bzwrite(image->blob->file_info.bzfile,(void *) data,
4133         (int) length);
4134 #endif
4135       break;
4136     }
4137     case FifoStream:
4138     {
4139       count=(ssize_t) image->blob->stream(image,data,length);
4140       break;
4141     }
4142     case BlobStream:
4143     {
4144       register unsigned char
4145         *q;
4146
4147       if ((image->blob->offset+(MagickOffsetType) length) >=
4148           (MagickOffsetType) image->blob->extent)
4149         {
4150           if (image->blob->mapped != MagickFalse)
4151             return(0);
4152           image->blob->quantum<<=1;
4153           image->blob->extent+=length+image->blob->quantum;
4154           image->blob->data=(unsigned char *) ResizeQuantumMemory(
4155             image->blob->data,image->blob->extent+1,sizeof(*image->blob->data));
4156           (void) SyncBlob(image);
4157           if (image->blob->data == (unsigned char *) NULL)
4158             {
4159               (void) DetachBlob(image->blob);
4160               return(0);
4161             }
4162         }
4163       q=image->blob->data+image->blob->offset;
4164       (void) memcpy(q,p,length);
4165       image->blob->offset+=length;
4166       if (image->blob->offset >= (MagickOffsetType) image->blob->length)
4167         image->blob->length=(size_t) image->blob->offset;
4168       count=(ssize_t) length;
4169     }
4170   }
4171   return(count);
4172 }
4173 \f
4174 /*
4175 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4176 %                                                                             %
4177 %                                                                             %
4178 %                                                                             %
4179 +  W r i t e B l o b B y t e                                                  %
4180 %                                                                             %
4181 %                                                                             %
4182 %                                                                             %
4183 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4184 %
4185 %  WriteBlobByte() write an integer to a blob.  It returns the number of bytes
4186 %  written (either 0 or 1);
4187 %
4188 %  The format of the WriteBlobByte method is:
4189 %
4190 %      ssize_t WriteBlobByte(Image *image,const unsigned char value)
4191 %
4192 %  A description of each parameter follows.
4193 %
4194 %    o image: the image.
4195 %
4196 %    o value: Specifies the value to write.
4197 %
4198 */
4199 MagickExport ssize_t WriteBlobByte(Image *image,const unsigned char value)
4200 {
4201   assert(image != (Image *) NULL);
4202   assert(image->signature == MagickSignature);
4203   return(WriteBlobStream(image,1,&value));
4204 }
4205 \f
4206 /*
4207 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4208 %                                                                             %
4209 %                                                                             %
4210 %                                                                             %
4211 +  W r i t e B l o b F l o a t                                                %
4212 %                                                                             %
4213 %                                                                             %
4214 %                                                                             %
4215 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4216 %
4217 %  WriteBlobFloat() writes a float value as a 32-bit quantity in the byte-order
4218 %  specified by the endian member of the image structure.
4219 %
4220 %  The format of the WriteBlobFloat method is:
4221 %
4222 %      ssize_t WriteBlobFloat(Image *image,const float value)
4223 %
4224 %  A description of each parameter follows.
4225 %
4226 %    o image: the image.
4227 %
4228 %    o value: Specifies the value to write.
4229 %
4230 */
4231 MagickExport ssize_t WriteBlobFloat(Image *image,const float value)
4232 {
4233   union
4234   {
4235     unsigned int
4236       unsigned_value;
4237
4238     float
4239       float_value;
4240   } quantum;
4241
4242   quantum.unsigned_value=0U;
4243   quantum.float_value=value;
4244   return(WriteBlobLong(image,quantum.unsigned_value));
4245 }
4246 \f
4247 /*
4248 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4249 %                                                                             %
4250 %                                                                             %
4251 %                                                                             %
4252 +  W r i t e B l o b L o n g                                                  %
4253 %                                                                             %
4254 %                                                                             %
4255 %                                                                             %
4256 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4257 %
4258 %  WriteBlobLong() writes a ssize_t value as a 32-bit quantity in the byte-order
4259 %  specified by the endian member of the image structure.
4260 %
4261 %  The format of the WriteBlobLong method is:
4262 %
4263 %      ssize_t WriteBlobLong(Image *image,const unsigned int value)
4264 %
4265 %  A description of each parameter follows.
4266 %
4267 %    o image: the image.
4268 %
4269 %    o value: Specifies the value to write.
4270 %
4271 */
4272 MagickExport ssize_t WriteBlobLong(Image *image,const unsigned int value)
4273 {
4274   unsigned char
4275     buffer[4];
4276
4277   assert(image != (Image *) NULL);
4278   assert(image->signature == MagickSignature);
4279   if (image->endian == LSBEndian)
4280     {
4281       buffer[0]=(unsigned char) value;
4282       buffer[1]=(unsigned char) (value >> 8);
4283       buffer[2]=(unsigned char) (value >> 16);
4284       buffer[3]=(unsigned char) (value >> 24);
4285       return(WriteBlobStream(image,4,buffer));
4286     }
4287   buffer[0]=(unsigned char) (value >> 24);
4288   buffer[1]=(unsigned char) (value >> 16);
4289   buffer[2]=(unsigned char) (value >> 8);
4290   buffer[3]=(unsigned char) value;
4291   return(WriteBlobStream(image,4,buffer));
4292 }
4293 \f
4294 /*
4295 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4296 %                                                                             %
4297 %                                                                             %
4298 %                                                                             %
4299 +   W r i t e B l o b S h o r t                                               %
4300 %                                                                             %
4301 %                                                                             %
4302 %                                                                             %
4303 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4304 %
4305 %  WriteBlobShort() writes a short value as a 16-bit quantity in the
4306 %  byte-order specified by the endian member of the image structure.
4307 %
4308 %  The format of the WriteBlobShort method is:
4309 %
4310 %      ssize_t WriteBlobShort(Image *image,const unsigned short value)
4311 %
4312 %  A description of each parameter follows.
4313 %
4314 %    o image: the image.
4315 %
4316 %    o value:  Specifies the value to write.
4317 %
4318 */
4319 MagickExport ssize_t WriteBlobShort(Image *image,const unsigned short value)
4320 {
4321   unsigned char
4322     buffer[2];
4323
4324   assert(image != (Image *) NULL);
4325   assert(image->signature == MagickSignature);
4326   if (image->endian == LSBEndian)
4327     {
4328       buffer[0]=(unsigned char) value;
4329       buffer[1]=(unsigned char) (value >> 8);
4330       return(WriteBlobStream(image,2,buffer));
4331     }
4332   buffer[0]=(unsigned char) (value >> 8);
4333   buffer[1]=(unsigned char) value;
4334   return(WriteBlobStream(image,2,buffer));
4335 }
4336 \f
4337 /*
4338 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4339 %                                                                             %
4340 %                                                                             %
4341 %                                                                             %
4342 +  W r i t e B l o b L S B L o n g                                            %
4343 %                                                                             %
4344 %                                                                             %
4345 %                                                                             %
4346 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4347 %
4348 %  WriteBlobLSBLong() writes a ssize_t value as a 32-bit quantity in
4349 %  least-significant byte first order.
4350 %
4351 %  The format of the WriteBlobLSBLong method is:
4352 %
4353 %      ssize_t WriteBlobLSBLong(Image *image,const unsigned int value)
4354 %
4355 %  A description of each parameter follows.
4356 %
4357 %    o image: the image.
4358 %
4359 %    o value: Specifies the value to write.
4360 %
4361 */
4362 MagickExport ssize_t WriteBlobLSBLong(Image *image,const unsigned int value)
4363 {
4364   unsigned char
4365     buffer[4];
4366
4367   assert(image != (Image *) NULL);
4368   assert(image->signature == MagickSignature);
4369   buffer[0]=(unsigned char) value;
4370   buffer[1]=(unsigned char) (value >> 8);
4371   buffer[2]=(unsigned char) (value >> 16);
4372   buffer[3]=(unsigned char) (value >> 24);
4373   return(WriteBlobStream(image,4,buffer));
4374 }
4375 \f
4376 /*
4377 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4378 %                                                                             %
4379 %                                                                             %
4380 %                                                                             %
4381 +   W r i t e B l o b L S B S h o r t                                         %
4382 %                                                                             %
4383 %                                                                             %
4384 %                                                                             %
4385 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4386 %
4387 %  WriteBlobLSBShort() writes a ssize_t value as a 16-bit quantity in
4388 %  least-significant byte first order.
4389 %
4390 %  The format of the WriteBlobLSBShort method is:
4391 %
4392 %      ssize_t WriteBlobLSBShort(Image *image,const unsigned short value)
4393 %
4394 %  A description of each parameter follows.
4395 %
4396 %    o image: the image.
4397 %
4398 %    o value:  Specifies the value to write.
4399 %
4400 */
4401 MagickExport ssize_t WriteBlobLSBShort(Image *image,const unsigned short value)
4402 {
4403   unsigned char
4404     buffer[2];
4405
4406   assert(image != (Image *) NULL);
4407   assert(image->signature == MagickSignature);
4408   buffer[0]=(unsigned char) value;
4409   buffer[1]=(unsigned char) (value >> 8);
4410   return(WriteBlobStream(image,2,buffer));
4411 }
4412 \f
4413 /*
4414 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4415 %                                                                             %
4416 %                                                                             %
4417 %                                                                             %
4418 +  W r i t e B l o b M S B L o n g                                            %
4419 %                                                                             %
4420 %                                                                             %
4421 %                                                                             %
4422 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4423 %
4424 %  WriteBlobMSBLong() writes a ssize_t value as a 32-bit quantity in
4425 %  most-significant byte first order.
4426 %
4427 %  The format of the WriteBlobMSBLong method is:
4428 %
4429 %      ssize_t WriteBlobMSBLong(Image *image,const unsigned int value)
4430 %
4431 %  A description of each parameter follows.
4432 %
4433 %    o value:  Specifies the value to write.
4434 %
4435 %    o image: the image.
4436 %
4437 */
4438 MagickExport ssize_t WriteBlobMSBLong(Image *image,const unsigned int value)
4439 {
4440   unsigned char
4441     buffer[4];
4442
4443   assert(image != (Image *) NULL);
4444   assert(image->signature == MagickSignature);
4445   buffer[0]=(unsigned char) (value >> 24);
4446   buffer[1]=(unsigned char) (value >> 16);
4447   buffer[2]=(unsigned char) (value >> 8);
4448   buffer[3]=(unsigned char) value;
4449   return(WriteBlobStream(image,4,buffer));
4450 }
4451 \f
4452 /*
4453 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4454 %                                                                             %
4455 %                                                                             %
4456 %                                                                             %
4457 +  W r i t e B l o b M S B L o n g L o n g                                    %
4458 %                                                                             %
4459 %                                                                             %
4460 %                                                                             %
4461 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4462 %
4463 %  WriteBlobMSBLongLong() writes a long long value as a 64-bit quantity in
4464 %  most-significant byte first order.
4465 %
4466 %  The format of the WriteBlobMSBLongLong method is:
4467 %
4468 %      ssize_t WriteBlobMSBLongLong(Image *image,const MagickSizeType value)
4469 %
4470 %  A description of each parameter follows.
4471 %
4472 %    o value:  Specifies the value to write.
4473 %
4474 %    o image: the image.
4475 %
4476 */
4477 MagickExport ssize_t WriteBlobMSBLongLong(Image *image,
4478   const MagickSizeType value)
4479 {
4480   unsigned char
4481     buffer[8];
4482
4483   assert(image != (Image *) NULL);
4484   assert(image->signature == MagickSignature);
4485   buffer[0]=(unsigned char) (value >> 56);
4486   buffer[1]=(unsigned char) (value >> 48);
4487   buffer[2]=(unsigned char) (value >> 40);
4488   buffer[3]=(unsigned char) (value >> 32);
4489   buffer[4]=(unsigned char) (value >> 24);
4490   buffer[5]=(unsigned char) (value >> 16);
4491   buffer[6]=(unsigned char) (value >> 8);
4492   buffer[7]=(unsigned char) value;
4493   return(WriteBlobStream(image,8,buffer));
4494 }
4495 \f
4496 /*
4497 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4498 %                                                                             %
4499 %                                                                             %
4500 %                                                                             %
4501 +  W r i t e B l o b M S B S h o r t                                          %
4502 %                                                                             %
4503 %                                                                             %
4504 %                                                                             %
4505 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4506 %
4507 %  WriteBlobMSBShort() writes a ssize_t value as a 16-bit quantity in
4508 %  most-significant byte first order.
4509 %
4510 %  The format of the WriteBlobMSBShort method is:
4511 %
4512 %      ssize_t WriteBlobMSBShort(Image *image,const unsigned short value)
4513 %
4514 %  A description of each parameter follows.
4515 %
4516 %   o  value:  Specifies the value to write.
4517 %
4518 %   o  file:  Specifies the file to write the data to.
4519 %
4520 */
4521 MagickExport ssize_t WriteBlobMSBShort(Image *image,const unsigned short value)
4522 {
4523   unsigned char
4524     buffer[2];
4525
4526   assert(image != (Image *) NULL);
4527   assert(image->signature == MagickSignature);
4528   buffer[0]=(unsigned char) (value >> 8);
4529   buffer[1]=(unsigned char) value;
4530   return(WriteBlobStream(image,2,buffer));
4531 }
4532 \f
4533 /*
4534 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4535 %                                                                             %
4536 %                                                                             %
4537 %                                                                             %
4538 +  W r i t e B l o b S t r i n g                                              %
4539 %                                                                             %
4540 %                                                                             %
4541 %                                                                             %
4542 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4543 %
4544 %  WriteBlobString() write a string to a blob.  It returns the number of
4545 %  characters written.
4546 %
4547 %  The format of the WriteBlobString method is:
4548 %
4549 %      ssize_t WriteBlobString(Image *image,const char *string)
4550 %
4551 %  A description of each parameter follows.
4552 %
4553 %    o image: the image.
4554 %
4555 %    o string: Specifies the string to write.
4556 %
4557 */
4558 MagickExport ssize_t WriteBlobString(Image *image,const char *string)
4559 {
4560   assert(image != (Image *) NULL);
4561   assert(image->signature == MagickSignature);
4562   assert(string != (const char *) NULL);
4563   return(WriteBlobStream(image,strlen(string),(const unsigned char *) string));
4564 }