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 1999-2013 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           {
2788             count=0;
2789             if (errno != EINTR)
2790               break;
2791           }
2792       }
2793       count=i;
2794       break;
2795     }
2796     case FileStream:
2797     case PipeStream:
2798     {
2799       switch (length)
2800       {
2801         default:
2802         {
2803           count=(ssize_t) fread(q,1,length,image->blob->file_info.file);
2804           break;
2805         }
2806         case 2:
2807         {
2808           c=getc(image->blob->file_info.file);
2809           if (c == EOF)
2810             break;
2811           *q++=(unsigned char) c;
2812           count++;
2813         }
2814         case 1:
2815         {
2816           c=getc(image->blob->file_info.file);
2817           if (c == EOF)
2818             break;
2819           *q++=(unsigned char) c;
2820           count++;
2821         }
2822         case 0:
2823           break;
2824       }
2825       break;
2826     }
2827     case ZipStream:
2828     {
2829 #if defined(MAGICKCORE_ZLIB_DELEGATE)
2830       switch (length)
2831       {
2832         default:
2833         {
2834           count=(ssize_t) gzread(image->blob->file_info.gzfile,q,
2835             (unsigned int) length);
2836           break;
2837         }
2838         case 2:
2839         {
2840           c=gzgetc(image->blob->file_info.gzfile);
2841           if (c == EOF)
2842             break;
2843           *q++=(unsigned char) c;
2844           count++;
2845         }
2846         case 1:
2847         {
2848           c=gzgetc(image->blob->file_info.gzfile);
2849           if (c == EOF)
2850             break;
2851           *q++=(unsigned char) c;
2852           count++;
2853         }
2854         case 0:
2855           break;
2856       }
2857 #endif
2858       break;
2859     }
2860     case BZipStream:
2861     {
2862 #if defined(MAGICKCORE_BZLIB_DELEGATE)
2863       count=(ssize_t) BZ2_bzread(image->blob->file_info.bzfile,q,
2864         (int) length);
2865 #endif
2866       break;
2867     }
2868     case FifoStream:
2869       break;
2870     case BlobStream:
2871     {
2872       register const unsigned char
2873         *p;
2874
2875       if (image->blob->offset >= (MagickOffsetType) image->blob->length)
2876         {
2877           image->blob->eof=MagickTrue;
2878           break;
2879         }
2880       p=image->blob->data+image->blob->offset;
2881       count=(ssize_t) MagickMin(length,(MagickSizeType) (image->blob->length-
2882         image->blob->offset));
2883       image->blob->offset+=count;
2884       if (count != (ssize_t) length)
2885         image->blob->eof=MagickTrue;
2886       (void) memcpy(q,p,(size_t) count);
2887       break;
2888     }
2889   }
2890   return(count);
2891 }
2892 \f
2893 /*
2894 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2895 %                                                                             %
2896 %                                                                             %
2897 %                                                                             %
2898 +  R e a d B l o b B y t e                                                    %
2899 %                                                                             %
2900 %                                                                             %
2901 %                                                                             %
2902 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2903 %
2904 %  ReadBlobByte() reads a single byte from the image file and returns it.
2905 %
2906 %  The format of the ReadBlobByte method is:
2907 %
2908 %      int ReadBlobByte(Image *image)
2909 %
2910 %  A description of each parameter follows.
2911 %
2912 %    o image: the image.
2913 %
2914 */
2915 MagickExport int ReadBlobByte(Image *image)
2916 {
2917   register const unsigned char
2918     *p;
2919
2920   ssize_t
2921     count;
2922
2923   unsigned char
2924     buffer[1];
2925
2926   assert(image != (Image *) NULL);
2927   assert(image->signature == MagickSignature);
2928   p=ReadBlobStream(image,1,buffer,&count);
2929   if (count != 1)
2930     return(EOF);
2931   return((int) (*p));
2932 }
2933 \f
2934 /*
2935 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2936 %                                                                             %
2937 %                                                                             %
2938 %                                                                             %
2939 +  R e a d B l o b D o u b l e                                                %
2940 %                                                                             %
2941 %                                                                             %
2942 %                                                                             %
2943 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2944 %
2945 %  ReadBlobDouble() reads a double value as a 64-bit quantity in the byte-order
2946 %  specified by the endian member of the image structure.
2947 %
2948 %  The format of the ReadBlobDouble method is:
2949 %
2950 %      double ReadBlobDouble(Image *image)
2951 %
2952 %  A description of each parameter follows.
2953 %
2954 %    o image: the image.
2955 %
2956 */
2957 MagickExport double ReadBlobDouble(Image *image)
2958 {
2959   union
2960   {
2961     MagickSizeType
2962       unsigned_value;
2963
2964     double
2965       double_value;
2966   } quantum;
2967
2968   quantum.double_value=0.0;
2969   quantum.unsigned_value=ReadBlobLongLong(image);
2970   return(quantum.double_value);
2971 }
2972 \f
2973 /*
2974 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2975 %                                                                             %
2976 %                                                                             %
2977 %                                                                             %
2978 +  R e a d B l o b F l o a t                                                  %
2979 %                                                                             %
2980 %                                                                             %
2981 %                                                                             %
2982 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
2983 %
2984 %  ReadBlobFloat() reads a float value as a 32-bit quantity in the byte-order
2985 %  specified by the endian member of the image structure.
2986 %
2987 %  The format of the ReadBlobFloat method is:
2988 %
2989 %      float ReadBlobFloat(Image *image)
2990 %
2991 %  A description of each parameter follows.
2992 %
2993 %    o image: the image.
2994 %
2995 */
2996 MagickExport float ReadBlobFloat(Image *image)
2997 {
2998   union
2999   {
3000     unsigned int
3001       unsigned_value;
3002
3003     float
3004       float_value;
3005   } quantum;
3006
3007   quantum.float_value=0.0;
3008   quantum.unsigned_value=ReadBlobLong(image);
3009   return(quantum.float_value);
3010 }
3011 \f
3012 /*
3013 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3014 %                                                                             %
3015 %                                                                             %
3016 %                                                                             %
3017 +  R e a d B l o b L o n g                                                    %
3018 %                                                                             %
3019 %                                                                             %
3020 %                                                                             %
3021 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3022 %
3023 %  ReadBlobLong() reads a ssize_t value as a 32-bit quantity in the byte-order
3024 %  specified by the endian member of the image structure.
3025 %
3026 %  The format of the ReadBlobLong method is:
3027 %
3028 %      unsigned int ReadBlobLong(Image *image)
3029 %
3030 %  A description of each parameter follows.
3031 %
3032 %    o image: the image.
3033 %
3034 */
3035 MagickExport unsigned int ReadBlobLong(Image *image)
3036 {
3037   register const unsigned char
3038     *p;
3039
3040   ssize_t
3041     count;
3042
3043   unsigned char
3044     buffer[4];
3045
3046   unsigned int
3047     value;
3048
3049   assert(image != (Image *) NULL);
3050   assert(image->signature == MagickSignature);
3051   *buffer='\0';
3052   p=ReadBlobStream(image,4,buffer,&count);
3053   if (count != 4)
3054     return(0UL);
3055   if (image->endian == LSBEndian)
3056     {
3057       value=(unsigned int) (*p++);
3058       value|=((unsigned int) (*p++)) << 8;
3059       value|=((unsigned int) (*p++)) << 16;
3060       value|=((unsigned int) (*p++)) << 24;
3061       return(value);
3062     }
3063   value=((unsigned int) (*p++)) << 24;
3064   value|=((unsigned int) (*p++)) << 16;
3065   value|=((unsigned int) (*p++)) << 8;
3066   value|=((unsigned int) (*p++));
3067   return(value);
3068 }
3069 \f
3070 /*
3071 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3072 %                                                                             %
3073 %                                                                             %
3074 %                                                                             %
3075 +  R e a d B l o b L o n g L o n g                                            %
3076 %                                                                             %
3077 %                                                                             %
3078 %                                                                             %
3079 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3080 %
3081 %  ReadBlobLongLong() reads a long long value as a 64-bit quantity in the
3082 %  byte-order specified by the endian member of the image structure.
3083 %
3084 %  The format of the ReadBlobLongLong method is:
3085 %
3086 %      MagickSizeType ReadBlobLongLong(Image *image)
3087 %
3088 %  A description of each parameter follows.
3089 %
3090 %    o image: the image.
3091 %
3092 */
3093 MagickExport MagickSizeType ReadBlobLongLong(Image *image)
3094 {
3095   MagickSizeType
3096     value;
3097
3098   register const unsigned char
3099     *p;
3100
3101   ssize_t
3102     count;
3103
3104   unsigned char
3105     buffer[8];
3106
3107   assert(image != (Image *) NULL);
3108   assert(image->signature == MagickSignature);
3109   *buffer='\0';
3110   p=ReadBlobStream(image,8,buffer,&count);
3111   if (count != 8)
3112     return(MagickULLConstant(0));
3113   if (image->endian == LSBEndian)
3114     {
3115       value=(MagickSizeType) (*p++);
3116       value|=((MagickSizeType) (*p++)) << 8;
3117       value|=((MagickSizeType) (*p++)) << 16;
3118       value|=((MagickSizeType) (*p++)) << 24;
3119       value|=((MagickSizeType) (*p++)) << 32;
3120       value|=((MagickSizeType) (*p++)) << 40;
3121       value|=((MagickSizeType) (*p++)) << 48;
3122       value|=((MagickSizeType) (*p++)) << 56;
3123       return(value & MagickULLConstant(0xffffffffffffffff));
3124     }
3125   value=((MagickSizeType) (*p++)) << 56;
3126   value|=((MagickSizeType) (*p++)) << 48;
3127   value|=((MagickSizeType) (*p++)) << 40;
3128   value|=((MagickSizeType) (*p++)) << 32;
3129   value|=((MagickSizeType) (*p++)) << 24;
3130   value|=((MagickSizeType) (*p++)) << 16;
3131   value|=((MagickSizeType) (*p++)) << 8;
3132   value|=((MagickSizeType) (*p++));
3133   return(value & MagickULLConstant(0xffffffffffffffff));
3134 }
3135 \f
3136 /*
3137 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3138 %                                                                             %
3139 %                                                                             %
3140 %                                                                             %
3141 +  R e a d B l o b S h o r t                                                  %
3142 %                                                                             %
3143 %                                                                             %
3144 %                                                                             %
3145 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3146 %
3147 %  ReadBlobShort() reads a short value as a 16-bit quantity in the byte-order
3148 %  specified by the endian member of the image structure.
3149 %
3150 %  The format of the ReadBlobShort method is:
3151 %
3152 %      unsigned short ReadBlobShort(Image *image)
3153 %
3154 %  A description of each parameter follows.
3155 %
3156 %    o image: the image.
3157 %
3158 */
3159 MagickExport unsigned short ReadBlobShort(Image *image)
3160 {
3161   register const unsigned char
3162     *p;
3163
3164   register unsigned int
3165     value;
3166
3167   ssize_t
3168     count;
3169
3170   unsigned char
3171     buffer[2];
3172
3173   assert(image != (Image *) NULL);
3174   assert(image->signature == MagickSignature);
3175   *buffer='\0';
3176   p=ReadBlobStream(image,2,buffer,&count);
3177   if (count != 2)
3178     return((unsigned short) 0U);
3179   if (image->endian == LSBEndian)
3180     {
3181       value=(unsigned int) (*p++);
3182       value|=((unsigned int) (*p++)) << 8;
3183       return((unsigned short) (value & 0xffff));
3184     }
3185   value=(unsigned int) ((*p++) << 8);
3186   value|=(unsigned int) (*p++);
3187   return((unsigned short) (value & 0xffff));
3188 }
3189 \f
3190 /*
3191 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3192 %                                                                             %
3193 %                                                                             %
3194 %                                                                             %
3195 +  R e a d B l o b L S B L o n g                                              %
3196 %                                                                             %
3197 %                                                                             %
3198 %                                                                             %
3199 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3200 %
3201 %  ReadBlobLSBLong() reads a ssize_t value as a 32-bit quantity in
3202 %  least-significant byte first order.
3203 %
3204 %  The format of the ReadBlobLSBLong method is:
3205 %
3206 %      unsigned int ReadBlobLSBLong(Image *image)
3207 %
3208 %  A description of each parameter follows.
3209 %
3210 %    o image: the image.
3211 %
3212 */
3213 MagickExport unsigned int ReadBlobLSBLong(Image *image)
3214 {
3215   register const unsigned char
3216     *p;
3217
3218   register unsigned int
3219     value;
3220
3221   ssize_t
3222     count;
3223
3224   unsigned char
3225     buffer[4];
3226
3227   assert(image != (Image *) NULL);
3228   assert(image->signature == MagickSignature);
3229   *buffer='\0';
3230   p=ReadBlobStream(image,4,buffer,&count);
3231   if (count != 4)
3232     return(0U);
3233   value=(unsigned int) (*p++);
3234   value|=((unsigned int) (*p++)) << 8;
3235   value|=((unsigned int) (*p++)) << 16;
3236   value|=((unsigned int) (*p++)) << 24;
3237   return(value);
3238 }
3239 \f
3240 /*
3241 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3242 %                                                                             %
3243 %                                                                             %
3244 %                                                                             %
3245 +  R e a d B l o b L S B S h o r t                                            %
3246 %                                                                             %
3247 %                                                                             %
3248 %                                                                             %
3249 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3250 %
3251 %  ReadBlobLSBShort() reads a short value as a 16-bit quantity in
3252 %  least-significant byte first order.
3253 %
3254 %  The format of the ReadBlobLSBShort method is:
3255 %
3256 %      unsigned short ReadBlobLSBShort(Image *image)
3257 %
3258 %  A description of each parameter follows.
3259 %
3260 %    o image: the image.
3261 %
3262 */
3263 MagickExport unsigned short ReadBlobLSBShort(Image *image)
3264 {
3265   register const unsigned char
3266     *p;
3267
3268   register unsigned int
3269     value;
3270
3271   ssize_t
3272     count;
3273
3274   unsigned char
3275     buffer[2];
3276
3277   assert(image != (Image *) NULL);
3278   assert(image->signature == MagickSignature);
3279   *buffer='\0';
3280   p=ReadBlobStream(image,2,buffer,&count);
3281   if (count != 2)
3282     return((unsigned short) 0U);
3283   value=(unsigned int) (*p++);
3284   value|=((unsigned int) ((*p++)) << 8);
3285   return((unsigned short) (value & 0xffff));
3286 }
3287 \f
3288 /*
3289 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3290 %                                                                             %
3291 %                                                                             %
3292 %                                                                             %
3293 +  R e a d B l o b M S B L o n g                                              %
3294 %                                                                             %
3295 %                                                                             %
3296 %                                                                             %
3297 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3298 %
3299 %  ReadBlobMSBLong() reads a ssize_t value as a 32-bit quantity in
3300 %  most-significant byte first order.
3301 %
3302 %  The format of the ReadBlobMSBLong method is:
3303 %
3304 %      unsigned int ReadBlobMSBLong(Image *image)
3305 %
3306 %  A description of each parameter follows.
3307 %
3308 %    o image: the image.
3309 %
3310 */
3311 MagickExport unsigned int ReadBlobMSBLong(Image *image)
3312 {
3313   register const unsigned char
3314     *p;
3315
3316   register unsigned int
3317     value;
3318
3319   ssize_t
3320     count;
3321
3322   unsigned char
3323     buffer[4];
3324
3325   assert(image != (Image *) NULL);
3326   assert(image->signature == MagickSignature);
3327   *buffer='\0';
3328   p=ReadBlobStream(image,4,buffer,&count);
3329   if (count != 4)
3330     return(0UL);
3331   value=((unsigned int) (*p++) << 24);
3332   value|=((unsigned int) (*p++) << 16);
3333   value|=((unsigned int) (*p++) << 8);
3334   value|=(unsigned int) (*p++);
3335   return(value);
3336 }
3337 \f
3338 /*
3339 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3340 %                                                                             %
3341 %                                                                             %
3342 %                                                                             %
3343 +  R e a d B l o b M S B L o n g L o n g                                      %
3344 %                                                                             %
3345 %                                                                             %
3346 %                                                                             %
3347 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3348 %
3349 %  ReadBlobMSBLongLong() reads a ssize_t value as a 64-bit quantity in
3350 %  most-significant byte first order.
3351 %
3352 %  The format of the ReadBlobMSBLongLong method is:
3353 %
3354 %      unsigned int ReadBlobMSBLongLong(Image *image)
3355 %
3356 %  A description of each parameter follows.
3357 %
3358 %    o image: the image.
3359 %
3360 */
3361 MagickExport MagickSizeType ReadBlobMSBLongLong(Image *image)
3362 {
3363   register const unsigned char
3364     *p;
3365
3366   register MagickSizeType
3367     value;
3368
3369   ssize_t
3370     count;
3371
3372   unsigned char
3373     buffer[8];
3374
3375   assert(image != (Image *) NULL);
3376   assert(image->signature == MagickSignature);
3377   *buffer='\0';
3378   p=ReadBlobStream(image,8,buffer,&count);
3379   if (count != 8)
3380     return(MagickULLConstant(0));
3381   value=((MagickSizeType) (*p++)) << 56;
3382   value|=((MagickSizeType) (*p++)) << 48;
3383   value|=((MagickSizeType) (*p++)) << 40;
3384   value|=((MagickSizeType) (*p++)) << 32;
3385   value|=((MagickSizeType) (*p++)) << 24;
3386   value|=((MagickSizeType) (*p++)) << 16;
3387   value|=((MagickSizeType) (*p++)) << 8;
3388   value|=((MagickSizeType) (*p++));
3389   return(value & MagickULLConstant(0xffffffffffffffff));
3390 }
3391 \f
3392 /*
3393 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3394 %                                                                             %
3395 %                                                                             %
3396 %                                                                             %
3397 +  R e a d B l o b M S B S h o r t                                            %
3398 %                                                                             %
3399 %                                                                             %
3400 %                                                                             %
3401 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3402 %
3403 %  ReadBlobMSBShort() reads a short value as a 16-bit quantity in
3404 %  most-significant byte first order.
3405 %
3406 %  The format of the ReadBlobMSBShort method is:
3407 %
3408 %      unsigned short ReadBlobMSBShort(Image *image)
3409 %
3410 %  A description of each parameter follows.
3411 %
3412 %    o image: the image.
3413 %
3414 */
3415 MagickExport unsigned short ReadBlobMSBShort(Image *image)
3416 {
3417   register const unsigned char
3418     *p;
3419
3420   register unsigned int
3421     value;
3422
3423   ssize_t
3424     count;
3425
3426   unsigned char
3427     buffer[2];
3428
3429   assert(image != (Image *) NULL);
3430   assert(image->signature == MagickSignature);
3431   *buffer='\0';
3432   p=ReadBlobStream(image,2,buffer,&count);
3433   if (count != 2)
3434     return((unsigned short) 0U);
3435   value=(unsigned int) ((*p++) << 8);
3436   value|=(unsigned int) (*p++);
3437   return((unsigned short) (value & 0xffff));
3438 }
3439 \f
3440 /*
3441 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3442 %                                                                             %
3443 %                                                                             %
3444 %                                                                             %
3445 +   R e a d B l o b S t r i n g                                               %
3446 %                                                                             %
3447 %                                                                             %
3448 %                                                                             %
3449 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3450 %
3451 %  ReadBlobString() reads characters from a blob or file until a newline
3452 %  character is read or an end-of-file condition is encountered.
3453 %
3454 %  The format of the ReadBlobString method is:
3455 %
3456 %      char *ReadBlobString(Image *image,char *string)
3457 %
3458 %  A description of each parameter follows:
3459 %
3460 %    o image: the image.
3461 %
3462 %    o string: the address of a character buffer.
3463 %
3464 */
3465 MagickExport char *ReadBlobString(Image *image,char *string)
3466 {
3467   register const unsigned char
3468     *p;
3469
3470   register ssize_t
3471     i;
3472
3473   ssize_t
3474     count;
3475
3476   unsigned char
3477     buffer[1];
3478
3479   assert(image != (Image *) NULL);
3480   assert(image->signature == MagickSignature);
3481   for (i=0; i < (MaxTextExtent-1L); i++)
3482   {
3483     p=ReadBlobStream(image,1,buffer,&count);
3484     if (count != 1)
3485       {
3486         if (i == 0)
3487           return((char *) NULL);
3488         break;
3489       }
3490     string[i]=(char) (*p);
3491     if ((string[i] == '\r') || (string[i] == '\n'))
3492       break;
3493   }
3494   if (string[i] == '\r')
3495     (void) ReadBlobStream(image,1,buffer,&count);
3496   string[i]='\0';
3497   return(string);
3498 }
3499 \f
3500 /*
3501 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3502 %                                                                             %
3503 %                                                                             %
3504 %                                                                             %
3505 +   R e f e r e n c e B l o b                                                 %
3506 %                                                                             %
3507 %                                                                             %
3508 %                                                                             %
3509 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3510 %
3511 %  ReferenceBlob() increments the reference count associated with the pixel
3512 %  blob returning a pointer to the blob.
3513 %
3514 %  The format of the ReferenceBlob method is:
3515 %
3516 %      BlobInfo ReferenceBlob(BlobInfo *blob_info)
3517 %
3518 %  A description of each parameter follows:
3519 %
3520 %    o blob_info: the blob_info.
3521 %
3522 */
3523 MagickExport BlobInfo *ReferenceBlob(BlobInfo *blob)
3524 {
3525   assert(blob != (BlobInfo *) NULL);
3526   assert(blob->signature == MagickSignature);
3527   if (blob->debug != MagickFalse)
3528     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
3529   LockSemaphoreInfo(blob->semaphore);
3530   blob->reference_count++;
3531   UnlockSemaphoreInfo(blob->semaphore);
3532   return(blob);
3533 }
3534 \f
3535 /*
3536 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3537 %                                                                             %
3538 %                                                                             %
3539 %                                                                             %
3540 +  S e e k B l o b                                                            %
3541 %                                                                             %
3542 %                                                                             %
3543 %                                                                             %
3544 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3545 %
3546 %  SeekBlob() sets the offset in bytes from the beginning of a blob or file
3547 %  and returns the resulting offset.
3548 %
3549 %  The format of the SeekBlob method is:
3550 %
3551 %      MagickOffsetType SeekBlob(Image *image,const MagickOffsetType offset,
3552 %        const int whence)
3553 %
3554 %  A description of each parameter follows:
3555 %
3556 %    o image: the image.
3557 %
3558 %    o offset:  Specifies an integer representing the offset in bytes.
3559 %
3560 %    o whence:  Specifies an integer representing how the offset is
3561 %      treated relative to the beginning of the blob as follows:
3562 %
3563 %        SEEK_SET  Set position equal to offset bytes.
3564 %        SEEK_CUR  Set position to current location plus offset.
3565 %        SEEK_END  Set position to EOF plus offset.
3566 %
3567 */
3568 MagickExport MagickOffsetType SeekBlob(Image *image,
3569   const MagickOffsetType offset,const int whence)
3570 {
3571   assert(image != (Image *) NULL);
3572   assert(image->signature == MagickSignature);
3573   if (image->debug != MagickFalse)
3574     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3575   assert(image->blob != (BlobInfo *) NULL);
3576   assert(image->blob->type != UndefinedStream);
3577   switch (image->blob->type)
3578   {
3579     case UndefinedStream:
3580       break;
3581     case StandardStream:
3582       return(-1);
3583     case FileStream:
3584     {
3585       if (fseek(image->blob->file_info.file,offset,whence) < 0)
3586         return(-1);
3587       image->blob->offset=TellBlob(image);
3588       break;
3589     }
3590     case PipeStream:
3591     case ZipStream:
3592     {
3593 #if defined(MAGICKCORE_ZLIB_DELEGATE)
3594       if (gzseek(image->blob->file_info.gzfile,(off_t) offset,whence) < 0)
3595         return(-1);
3596 #endif
3597       image->blob->offset=TellBlob(image);
3598       break;
3599     }
3600     case BZipStream:
3601       return(-1);
3602     case FifoStream:
3603       return(-1);
3604     case BlobStream:
3605     {
3606       switch (whence)
3607       {
3608         case SEEK_SET:
3609         default:
3610         {
3611           if (offset < 0)
3612             return(-1);
3613           image->blob->offset=offset;
3614           break;
3615         }
3616         case SEEK_CUR:
3617         {
3618           if ((image->blob->offset+offset) < 0)
3619             return(-1);
3620           image->blob->offset+=offset;
3621           break;
3622         }
3623         case SEEK_END:
3624         {
3625           if (((MagickOffsetType) image->blob->length+offset) < 0)
3626             return(-1);
3627           image->blob->offset=image->blob->length+offset;
3628           break;
3629         }
3630       }
3631       if (image->blob->offset <= (MagickOffsetType)
3632           ((off_t) image->blob->length))
3633         image->blob->eof=MagickFalse;
3634       else
3635         if (image->blob->mapped != MagickFalse)
3636           return(-1);
3637         else
3638           {
3639             image->blob->extent=(size_t) (image->blob->offset+
3640               image->blob->quantum);
3641             image->blob->data=(unsigned char *) ResizeQuantumMemory(
3642               image->blob->data,image->blob->extent+1,
3643               sizeof(*image->blob->data));
3644             (void) SyncBlob(image);
3645             if (image->blob->data == (unsigned char *) NULL)
3646               {
3647                 (void) DetachBlob(image->blob);
3648                 return(-1);
3649               }
3650           }
3651       break;
3652     }
3653   }
3654   return(image->blob->offset);
3655 }
3656 \f
3657 /*
3658 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3659 %                                                                             %
3660 %                                                                             %
3661 %                                                                             %
3662 +   S e t B l o b E x e m p t                                                 %
3663 %                                                                             %
3664 %                                                                             %
3665 %                                                                             %
3666 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3667 %
3668 %  SetBlobExempt() sets the blob exempt status.
3669 %
3670 %  The format of the SetBlobExempt method is:
3671 %
3672 %      MagickBooleanType SetBlobExempt(const Image *image,
3673 %        const MagickBooleanType exempt)
3674 %
3675 %  A description of each parameter follows:
3676 %
3677 %    o image: the image.
3678 %
3679 %    o exempt: Set to true if this blob is exempt from being closed.
3680 %
3681 */
3682 MagickPrivate void SetBlobExempt(Image *image,const MagickBooleanType exempt)
3683 {
3684   assert(image != (const Image *) NULL);
3685   assert(image->signature == MagickSignature);
3686   if (image->debug != MagickFalse)
3687     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3688   image->blob->exempt=exempt;
3689 }
3690 \f
3691 /*
3692 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3693 %                                                                             %
3694 %                                                                             %
3695 %                                                                             %
3696 +  S e t B l o b E x t e n t                                                  %
3697 %                                                                             %
3698 %                                                                             %
3699 %                                                                             %
3700 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3701 %
3702 %  SetBlobExtent() ensures enough space is allocated for the blob.  If the
3703 %  method is successful, subsequent writes to bytes in the specified range are
3704 %  guaranteed not to fail.
3705 %
3706 %  The format of the SetBlobExtent method is:
3707 %
3708 %      MagickBooleanType SetBlobExtent(Image *image,const MagickSizeType extent)
3709 %
3710 %  A description of each parameter follows:
3711 %
3712 %    o image: the image.
3713 %
3714 %    o extent:  the blob maximum extent.
3715 %
3716 */
3717 MagickPrivate MagickBooleanType SetBlobExtent(Image *image,
3718   const MagickSizeType extent)
3719 {
3720   assert(image != (Image *) NULL);
3721   assert(image->signature == MagickSignature);
3722   if (image->debug != MagickFalse)
3723     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3724   assert(image->blob != (BlobInfo *) NULL);
3725   assert(image->blob->type != UndefinedStream);
3726   switch (image->blob->type)
3727   {
3728     case UndefinedStream:
3729       break;
3730     case StandardStream:
3731       return(MagickFalse);
3732     case FileStream:
3733     {
3734       if (extent != (MagickSizeType) ((off_t) extent))
3735         return(MagickFalse);
3736 #if !defined(MAGICKCORE_HAVE_POSIX_FALLOCATE)
3737         return(MagickFalse);
3738 #else
3739       {
3740         int
3741           status;
3742
3743         MagickOffsetType
3744           offset;
3745
3746         offset=TellBlob(image);
3747         status=posix_fallocate(fileno(image->blob->file_info.file),offset,
3748           extent-offset);
3749         if (status != 0)
3750           return(MagickFalse);
3751       }
3752 #endif
3753       break;
3754     }
3755     case PipeStream:
3756     case ZipStream:
3757       return(MagickFalse);
3758     case BZipStream:
3759       return(MagickFalse);
3760     case FifoStream:
3761       return(MagickFalse);
3762     case BlobStream:
3763     {
3764       if (image->blob->mapped != MagickFalse)
3765         {
3766           if (image->blob->file_info.file == (FILE *) NULL)
3767             return(MagickFalse);
3768           (void) UnmapBlob(image->blob->data,image->blob->length);
3769 #if !defined(MAGICKCORE_HAVE_POSIX_FALLOCATE)
3770           return(MagickFalse);
3771 #else
3772           {
3773             int
3774               status;
3775
3776             MagickOffsetType
3777               offset;
3778
3779             offset=TellBlob(image);
3780             status=posix_fallocate(fileno(image->blob->file_info.file),offset,
3781               extent-offset);
3782             if (status != 0)
3783               return(MagickFalse);
3784           }
3785           image->blob->data=(unsigned char*) MapBlob(fileno(
3786             image->blob->file_info.file),WriteMode,0,(size_t) extent);
3787           image->blob->extent=(size_t) extent;
3788           image->blob->length=(size_t) extent;
3789           (void) SyncBlob(image);
3790           break;
3791 #endif
3792         }
3793       if (extent != (MagickSizeType) ((size_t) extent))
3794         return(MagickFalse);
3795       image->blob->extent=(size_t) extent;
3796       image->blob->data=(unsigned char *) ResizeQuantumMemory(image->blob->data,
3797         image->blob->extent+1,sizeof(*image->blob->data));
3798       (void) SyncBlob(image);
3799       if (image->blob->data == (unsigned char *) NULL)
3800         {
3801           (void) DetachBlob(image->blob);
3802           return(MagickFalse);
3803         }
3804       break;
3805     }
3806   }
3807   return(MagickTrue);
3808 }
3809 \f
3810 /*
3811 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3812 %                                                                             %
3813 %                                                                             %
3814 %                                                                             %
3815 +  S y n c B l o b                                                            %
3816 %                                                                             %
3817 %                                                                             %
3818 %                                                                             %
3819 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3820 %
3821 %  SyncBlob() flushes the datastream if it is a file or synchronizes the data
3822 %  attributes if it is an blob.
3823 %
3824 %  The format of the SyncBlob method is:
3825 %
3826 %      int SyncBlob(Image *image)
3827 %
3828 %  A description of each parameter follows:
3829 %
3830 %    o image: the image.
3831 %
3832 */
3833 static int SyncBlob(Image *image)
3834 {
3835   int
3836     status;
3837
3838   assert(image != (Image *) NULL);
3839   assert(image->signature == MagickSignature);
3840   if (image->debug != MagickFalse)
3841     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3842   assert(image->blob != (BlobInfo *) NULL);
3843   assert(image->blob->type != UndefinedStream);
3844   status=0;
3845   switch (image->blob->type)
3846   {
3847     case UndefinedStream:
3848     case StandardStream:
3849       break;
3850     case FileStream:
3851     case PipeStream:
3852     {
3853       status=fflush(image->blob->file_info.file);
3854       break;
3855     }
3856     case ZipStream:
3857     {
3858 #if defined(MAGICKCORE_ZLIB_DELEGATE)
3859       status=gzflush(image->blob->file_info.gzfile,Z_SYNC_FLUSH);
3860 #endif
3861       break;
3862     }
3863     case BZipStream:
3864     {
3865 #if defined(MAGICKCORE_BZLIB_DELEGATE)
3866       status=BZ2_bzflush(image->blob->file_info.bzfile);
3867 #endif
3868       break;
3869     }
3870     case FifoStream:
3871       break;
3872     case BlobStream:
3873     {
3874 #if defined(MAGICKCORE_HAVE_MMAP_FILEIO)
3875       if (image->blob->mapped != MagickFalse)
3876         status=msync(image->blob->data,image->blob->length,MS_SYNC);
3877 #endif
3878       break;
3879     }
3880   }
3881   return(status);
3882 }
3883 \f
3884 /*
3885 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3886 %                                                                             %
3887 %                                                                             %
3888 %                                                                             %
3889 +  T e l l B l o b                                                            %
3890 %                                                                             %
3891 %                                                                             %
3892 %                                                                             %
3893 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3894 %
3895 %  TellBlob() obtains the current value of the blob or file position.
3896 %
3897 %  The format of the TellBlob method is:
3898 %
3899 %      MagickOffsetType TellBlob(const Image *image)
3900 %
3901 %  A description of each parameter follows:
3902 %
3903 %    o image: the image.
3904 %
3905 */
3906 MagickExport MagickOffsetType TellBlob(const Image *image)
3907 {
3908   MagickOffsetType
3909     offset;
3910
3911   assert(image != (Image *) NULL);
3912   assert(image->signature == MagickSignature);
3913   if (image->debug != MagickFalse)
3914     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
3915   assert(image->blob != (BlobInfo *) NULL);
3916   assert(image->blob->type != UndefinedStream);
3917   offset=(-1);
3918   switch (image->blob->type)
3919   {
3920     case UndefinedStream:
3921     case StandardStream:
3922       break;
3923     case FileStream:
3924     {
3925       offset=ftell(image->blob->file_info.file);
3926       break;
3927     }
3928     case PipeStream:
3929       break;
3930     case ZipStream:
3931     {
3932 #if defined(MAGICKCORE_ZLIB_DELEGATE)
3933       offset=(MagickOffsetType) gztell(image->blob->file_info.gzfile);
3934 #endif
3935       break;
3936     }
3937     case BZipStream:
3938       break;
3939     case FifoStream:
3940       break;
3941     case BlobStream:
3942     {
3943       offset=image->blob->offset;
3944       break;
3945     }
3946   }
3947   return(offset);
3948 }
3949 \f
3950 /*
3951 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3952 %                                                                             %
3953 %                                                                             %
3954 %                                                                             %
3955 +  U n m a p B l o b                                                          %
3956 %                                                                             %
3957 %                                                                             %
3958 %                                                                             %
3959 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3960 %
3961 %  UnmapBlob() deallocates the binary large object previously allocated with
3962 %  the MapBlob method.
3963 %
3964 %  The format of the UnmapBlob method is:
3965 %
3966 %       MagickBooleanType UnmapBlob(void *map,const size_t length)
3967 %
3968 %  A description of each parameter follows:
3969 %
3970 %    o map: the address  of the binary large object.
3971 %
3972 %    o length: the length of the binary large object.
3973 %
3974 */
3975 MagickExport MagickBooleanType UnmapBlob(void *map,const size_t length)
3976 {
3977 #if defined(MAGICKCORE_HAVE_MMAP_FILEIO)
3978   int
3979     status;
3980
3981   status=munmap(map,length);
3982   return(status == -1 ? MagickFalse : MagickTrue);
3983 #else
3984   (void) map;
3985   (void) length;
3986   return(MagickFalse);
3987 #endif
3988 }
3989 \f
3990 /*
3991 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
3992 %                                                                             %
3993 %                                                                             %
3994 %                                                                             %
3995 +  W r i t e B l o b                                                          %
3996 %                                                                             %
3997 %                                                                             %
3998 %                                                                             %
3999 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4000 %
4001 %  WriteBlob() writes data to a blob or image file.  It returns the number of
4002 %  bytes written.
4003 %
4004 %  The format of the WriteBlob method is:
4005 %
4006 %      ssize_t WriteBlob(Image *image,const size_t length,
4007 %        const unsigned char *data)
4008 %
4009 %  A description of each parameter follows:
4010 %
4011 %    o image: the image.
4012 %
4013 %    o length:  Specifies an integer representing the number of bytes to
4014 %      write to the file.
4015 %
4016 %    o data:  The address of the data to write to the blob or file.
4017 %
4018 */
4019 MagickExport ssize_t WriteBlob(Image *image,const size_t length,
4020   const unsigned char *data)
4021 {
4022   int
4023     c;
4024
4025   register const unsigned char
4026     *p;
4027
4028   ssize_t
4029     count;
4030
4031   assert(image != (Image *) NULL);
4032   assert(image->signature == MagickSignature);
4033   assert(data != (const unsigned char *) NULL);
4034   assert(image->blob != (BlobInfo *) NULL);
4035   assert(image->blob->type != UndefinedStream);
4036   if (length == 0)
4037     return(0);
4038   count=0;
4039   p=data;
4040   switch (image->blob->type)
4041   {
4042     case UndefinedStream:
4043       break;
4044     case StandardStream:
4045     {
4046       register ssize_t
4047         i;
4048
4049       count=0;
4050       for (i=0; i < (MagickOffsetType) length; i+=count)
4051       {
4052         count=write(fileno(image->blob->file_info.file),data+i,(size_t)
4053           MagickMin(length-i,SSIZE_MAX));
4054         if (count <= 0)
4055           {
4056             count=0;
4057             if (errno != EINTR)
4058               break;
4059           }
4060       }
4061       count=i;
4062       break;
4063     }
4064     case FileStream:
4065     case PipeStream:
4066     {
4067       switch (length)
4068       {
4069         default:
4070         {
4071           count=(ssize_t) fwrite((const char *) data,1,length,
4072             image->blob->file_info.file);
4073           break;
4074         }
4075         case 2:
4076         {
4077           c=putc((int) *p++,image->blob->file_info.file);
4078           if (c == EOF)
4079             break;
4080           count++;
4081         }
4082         case 1:
4083         {
4084           c=putc((int) *p++,image->blob->file_info.file);
4085           if (c == EOF)
4086             break;
4087           count++;
4088         }
4089         case 0:
4090           break;
4091       }
4092       break;
4093     }
4094     case ZipStream:
4095     {
4096 #if defined(MAGICKCORE_ZLIB_DELEGATE)
4097       switch (length)
4098       {
4099         default:
4100         {
4101           count=(ssize_t) gzwrite(image->blob->file_info.gzfile,(void *) data,
4102             (unsigned int) length);
4103           break;
4104         }
4105         case 2:
4106         {
4107           c=gzputc(image->blob->file_info.gzfile,(int) *p++);
4108           if (c == EOF)
4109             break;
4110           count++;
4111         }
4112         case 1:
4113         {
4114           c=gzputc(image->blob->file_info.gzfile,(int) *p++);
4115           if (c == EOF)
4116             break;
4117           count++;
4118         }
4119         case 0:
4120           break;
4121       }
4122 #endif
4123       break;
4124     }
4125     case BZipStream:
4126     {
4127 #if defined(MAGICKCORE_BZLIB_DELEGATE)
4128       count=(ssize_t) BZ2_bzwrite(image->blob->file_info.bzfile,(void *) data,
4129         (int) length);
4130 #endif
4131       break;
4132     }
4133     case FifoStream:
4134     {
4135       count=(ssize_t) image->blob->stream(image,data,length);
4136       break;
4137     }
4138     case BlobStream:
4139     {
4140       register unsigned char
4141         *q;
4142
4143       if ((image->blob->offset+(MagickOffsetType) length) >=
4144           (MagickOffsetType) image->blob->extent)
4145         {
4146           if (image->blob->mapped != MagickFalse)
4147             return(0);
4148           image->blob->quantum<<=1;
4149           image->blob->extent+=length+image->blob->quantum;
4150           image->blob->data=(unsigned char *) ResizeQuantumMemory(
4151             image->blob->data,image->blob->extent+1,sizeof(*image->blob->data));
4152           (void) SyncBlob(image);
4153           if (image->blob->data == (unsigned char *) NULL)
4154             {
4155               (void) DetachBlob(image->blob);
4156               return(0);
4157             }
4158         }
4159       q=image->blob->data+image->blob->offset;
4160       (void) memcpy(q,p,length);
4161       image->blob->offset+=length;
4162       if (image->blob->offset >= (MagickOffsetType) image->blob->length)
4163         image->blob->length=(size_t) image->blob->offset;
4164       count=(ssize_t) length;
4165     }
4166   }
4167   return(count);
4168 }
4169 \f
4170 /*
4171 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4172 %                                                                             %
4173 %                                                                             %
4174 %                                                                             %
4175 +  W r i t e B l o b B y t e                                                  %
4176 %                                                                             %
4177 %                                                                             %
4178 %                                                                             %
4179 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4180 %
4181 %  WriteBlobByte() write an integer to a blob.  It returns the number of bytes
4182 %  written (either 0 or 1);
4183 %
4184 %  The format of the WriteBlobByte method is:
4185 %
4186 %      ssize_t WriteBlobByte(Image *image,const unsigned char value)
4187 %
4188 %  A description of each parameter follows.
4189 %
4190 %    o image: the image.
4191 %
4192 %    o value: Specifies the value to write.
4193 %
4194 */
4195 MagickExport ssize_t WriteBlobByte(Image *image,const unsigned char value)
4196 {
4197   assert(image != (Image *) NULL);
4198   assert(image->signature == MagickSignature);
4199   return(WriteBlobStream(image,1,&value));
4200 }
4201 \f
4202 /*
4203 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4204 %                                                                             %
4205 %                                                                             %
4206 %                                                                             %
4207 +  W r i t e B l o b F l o a t                                                %
4208 %                                                                             %
4209 %                                                                             %
4210 %                                                                             %
4211 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4212 %
4213 %  WriteBlobFloat() writes a float value as a 32-bit quantity in the byte-order
4214 %  specified by the endian member of the image structure.
4215 %
4216 %  The format of the WriteBlobFloat method is:
4217 %
4218 %      ssize_t WriteBlobFloat(Image *image,const float value)
4219 %
4220 %  A description of each parameter follows.
4221 %
4222 %    o image: the image.
4223 %
4224 %    o value: Specifies the value to write.
4225 %
4226 */
4227 MagickExport ssize_t WriteBlobFloat(Image *image,const float value)
4228 {
4229   union
4230   {
4231     unsigned int
4232       unsigned_value;
4233
4234     float
4235       float_value;
4236   } quantum;
4237
4238   quantum.unsigned_value=0U;
4239   quantum.float_value=value;
4240   return(WriteBlobLong(image,quantum.unsigned_value));
4241 }
4242 \f
4243 /*
4244 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4245 %                                                                             %
4246 %                                                                             %
4247 %                                                                             %
4248 +  W r i t e B l o b L o n g                                                  %
4249 %                                                                             %
4250 %                                                                             %
4251 %                                                                             %
4252 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4253 %
4254 %  WriteBlobLong() writes a ssize_t value as a 32-bit quantity in the byte-order
4255 %  specified by the endian member of the image structure.
4256 %
4257 %  The format of the WriteBlobLong method is:
4258 %
4259 %      ssize_t WriteBlobLong(Image *image,const unsigned int value)
4260 %
4261 %  A description of each parameter follows.
4262 %
4263 %    o image: the image.
4264 %
4265 %    o value: Specifies the value to write.
4266 %
4267 */
4268 MagickExport ssize_t WriteBlobLong(Image *image,const unsigned int value)
4269 {
4270   unsigned char
4271     buffer[4];
4272
4273   assert(image != (Image *) NULL);
4274   assert(image->signature == MagickSignature);
4275   if (image->endian == LSBEndian)
4276     {
4277       buffer[0]=(unsigned char) value;
4278       buffer[1]=(unsigned char) (value >> 8);
4279       buffer[2]=(unsigned char) (value >> 16);
4280       buffer[3]=(unsigned char) (value >> 24);
4281       return(WriteBlobStream(image,4,buffer));
4282     }
4283   buffer[0]=(unsigned char) (value >> 24);
4284   buffer[1]=(unsigned char) (value >> 16);
4285   buffer[2]=(unsigned char) (value >> 8);
4286   buffer[3]=(unsigned char) value;
4287   return(WriteBlobStream(image,4,buffer));
4288 }
4289 \f
4290 /*
4291 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4292 %                                                                             %
4293 %                                                                             %
4294 %                                                                             %
4295 +   W r i t e B l o b S h o r t                                               %
4296 %                                                                             %
4297 %                                                                             %
4298 %                                                                             %
4299 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4300 %
4301 %  WriteBlobShort() writes a short value as a 16-bit quantity in the
4302 %  byte-order specified by the endian member of the image structure.
4303 %
4304 %  The format of the WriteBlobShort method is:
4305 %
4306 %      ssize_t WriteBlobShort(Image *image,const unsigned short value)
4307 %
4308 %  A description of each parameter follows.
4309 %
4310 %    o image: the image.
4311 %
4312 %    o value:  Specifies the value to write.
4313 %
4314 */
4315 MagickExport ssize_t WriteBlobShort(Image *image,const unsigned short value)
4316 {
4317   unsigned char
4318     buffer[2];
4319
4320   assert(image != (Image *) NULL);
4321   assert(image->signature == MagickSignature);
4322   if (image->endian == LSBEndian)
4323     {
4324       buffer[0]=(unsigned char) value;
4325       buffer[1]=(unsigned char) (value >> 8);
4326       return(WriteBlobStream(image,2,buffer));
4327     }
4328   buffer[0]=(unsigned char) (value >> 8);
4329   buffer[1]=(unsigned char) value;
4330   return(WriteBlobStream(image,2,buffer));
4331 }
4332 \f
4333 /*
4334 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4335 %                                                                             %
4336 %                                                                             %
4337 %                                                                             %
4338 +  W r i t e B l o b L S B L o n g                                            %
4339 %                                                                             %
4340 %                                                                             %
4341 %                                                                             %
4342 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4343 %
4344 %  WriteBlobLSBLong() writes a ssize_t value as a 32-bit quantity in
4345 %  least-significant byte first order.
4346 %
4347 %  The format of the WriteBlobLSBLong method is:
4348 %
4349 %      ssize_t WriteBlobLSBLong(Image *image,const unsigned int value)
4350 %
4351 %  A description of each parameter follows.
4352 %
4353 %    o image: the image.
4354 %
4355 %    o value: Specifies the value to write.
4356 %
4357 */
4358 MagickExport ssize_t WriteBlobLSBLong(Image *image,const unsigned int value)
4359 {
4360   unsigned char
4361     buffer[4];
4362
4363   assert(image != (Image *) NULL);
4364   assert(image->signature == MagickSignature);
4365   buffer[0]=(unsigned char) value;
4366   buffer[1]=(unsigned char) (value >> 8);
4367   buffer[2]=(unsigned char) (value >> 16);
4368   buffer[3]=(unsigned char) (value >> 24);
4369   return(WriteBlobStream(image,4,buffer));
4370 }
4371 \f
4372 /*
4373 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4374 %                                                                             %
4375 %                                                                             %
4376 %                                                                             %
4377 +   W r i t e B l o b L S B S h o r t                                         %
4378 %                                                                             %
4379 %                                                                             %
4380 %                                                                             %
4381 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4382 %
4383 %  WriteBlobLSBShort() writes a ssize_t value as a 16-bit quantity in
4384 %  least-significant byte first order.
4385 %
4386 %  The format of the WriteBlobLSBShort method is:
4387 %
4388 %      ssize_t WriteBlobLSBShort(Image *image,const unsigned short value)
4389 %
4390 %  A description of each parameter follows.
4391 %
4392 %    o image: the image.
4393 %
4394 %    o value:  Specifies the value to write.
4395 %
4396 */
4397 MagickExport ssize_t WriteBlobLSBShort(Image *image,const unsigned short value)
4398 {
4399   unsigned char
4400     buffer[2];
4401
4402   assert(image != (Image *) NULL);
4403   assert(image->signature == MagickSignature);
4404   buffer[0]=(unsigned char) value;
4405   buffer[1]=(unsigned char) (value >> 8);
4406   return(WriteBlobStream(image,2,buffer));
4407 }
4408 \f
4409 /*
4410 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4411 %                                                                             %
4412 %                                                                             %
4413 %                                                                             %
4414 +  W r i t e B l o b M S B L o n g                                            %
4415 %                                                                             %
4416 %                                                                             %
4417 %                                                                             %
4418 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4419 %
4420 %  WriteBlobMSBLong() writes a ssize_t value as a 32-bit quantity in
4421 %  most-significant byte first order.
4422 %
4423 %  The format of the WriteBlobMSBLong method is:
4424 %
4425 %      ssize_t WriteBlobMSBLong(Image *image,const unsigned int value)
4426 %
4427 %  A description of each parameter follows.
4428 %
4429 %    o value:  Specifies the value to write.
4430 %
4431 %    o image: the image.
4432 %
4433 */
4434 MagickExport ssize_t WriteBlobMSBLong(Image *image,const unsigned int value)
4435 {
4436   unsigned char
4437     buffer[4];
4438
4439   assert(image != (Image *) NULL);
4440   assert(image->signature == MagickSignature);
4441   buffer[0]=(unsigned char) (value >> 24);
4442   buffer[1]=(unsigned char) (value >> 16);
4443   buffer[2]=(unsigned char) (value >> 8);
4444   buffer[3]=(unsigned char) value;
4445   return(WriteBlobStream(image,4,buffer));
4446 }
4447 \f
4448 /*
4449 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4450 %                                                                             %
4451 %                                                                             %
4452 %                                                                             %
4453 +  W r i t e B l o b M S B L o n g L o n g                                    %
4454 %                                                                             %
4455 %                                                                             %
4456 %                                                                             %
4457 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4458 %
4459 %  WriteBlobMSBLongLong() writes a long long value as a 64-bit quantity in
4460 %  most-significant byte first order.
4461 %
4462 %  The format of the WriteBlobMSBLongLong method is:
4463 %
4464 %      ssize_t WriteBlobMSBLongLong(Image *image,const MagickSizeType value)
4465 %
4466 %  A description of each parameter follows.
4467 %
4468 %    o value:  Specifies the value to write.
4469 %
4470 %    o image: the image.
4471 %
4472 */
4473 MagickExport ssize_t WriteBlobMSBLongLong(Image *image,
4474   const MagickSizeType value)
4475 {
4476   unsigned char
4477     buffer[8];
4478
4479   assert(image != (Image *) NULL);
4480   assert(image->signature == MagickSignature);
4481   buffer[0]=(unsigned char) (value >> 56);
4482   buffer[1]=(unsigned char) (value >> 48);
4483   buffer[2]=(unsigned char) (value >> 40);
4484   buffer[3]=(unsigned char) (value >> 32);
4485   buffer[4]=(unsigned char) (value >> 24);
4486   buffer[5]=(unsigned char) (value >> 16);
4487   buffer[6]=(unsigned char) (value >> 8);
4488   buffer[7]=(unsigned char) value;
4489   return(WriteBlobStream(image,8,buffer));
4490 }
4491 \f
4492 /*
4493 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4494 %                                                                             %
4495 %                                                                             %
4496 %                                                                             %
4497 +  W r i t e B l o b M S B S h o r t                                          %
4498 %                                                                             %
4499 %                                                                             %
4500 %                                                                             %
4501 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4502 %
4503 %  WriteBlobMSBShort() writes a ssize_t value as a 16-bit quantity in
4504 %  most-significant byte first order.
4505 %
4506 %  The format of the WriteBlobMSBShort method is:
4507 %
4508 %      ssize_t WriteBlobMSBShort(Image *image,const unsigned short value)
4509 %
4510 %  A description of each parameter follows.
4511 %
4512 %   o  value:  Specifies the value to write.
4513 %
4514 %   o  file:  Specifies the file to write the data to.
4515 %
4516 */
4517 MagickExport ssize_t WriteBlobMSBShort(Image *image,const unsigned short value)
4518 {
4519   unsigned char
4520     buffer[2];
4521
4522   assert(image != (Image *) NULL);
4523   assert(image->signature == MagickSignature);
4524   buffer[0]=(unsigned char) (value >> 8);
4525   buffer[1]=(unsigned char) value;
4526   return(WriteBlobStream(image,2,buffer));
4527 }
4528 \f
4529 /*
4530 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4531 %                                                                             %
4532 %                                                                             %
4533 %                                                                             %
4534 +  W r i t e B l o b S t r i n g                                              %
4535 %                                                                             %
4536 %                                                                             %
4537 %                                                                             %
4538 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
4539 %
4540 %  WriteBlobString() write a string to a blob.  It returns the number of
4541 %  characters written.
4542 %
4543 %  The format of the WriteBlobString method is:
4544 %
4545 %      ssize_t WriteBlobString(Image *image,const char *string)
4546 %
4547 %  A description of each parameter follows.
4548 %
4549 %    o image: the image.
4550 %
4551 %    o string: Specifies the string to write.
4552 %
4553 */
4554 MagickExport ssize_t WriteBlobString(Image *image,const char *string)
4555 {
4556   assert(image != (Image *) NULL);
4557   assert(image->signature == MagickSignature);
4558   assert(string != (const char *) NULL);
4559   return(WriteBlobStream(image,strlen(string),(const unsigned char *) string));
4560 }