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gerrit-public.fairphone.software / platform / external / ImageMagick / 6de4bc2b04dcfeb7df8e58efc57f124a6fdc256a / . / magick / blob.c
blob: 9d8cccc2b9a9fa0f8f9860db9ebd7390553bbdb7 [file] [log] [blame]
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% BBBB L OOO BBBB %
% B B L O O B B %
% BBBB L O O BBBB %
% B B L O O B B %
% BBBB LLLLL OOO BBBB %
% %
% %
% MagickCore Binary Large OBjectS Methods %
% %
% Software Design %
% John Cristy %
% July 1999 %
% %
% %
% Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization %
% dedicated to making software imaging solutions freely available. %
% %
% You may not use this file except in compliance with the License. You may %
% obtain a copy of the License at %
% %
% http://www.imagemagick.org/script/license.php %
% %
% Unless required by applicable law or agreed to in writing, software %
% distributed under the License is distributed on an "AS IS" BASIS, %
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
% See the License for the specific language governing permissions and %
% limitations under the License. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/cache.h"
#include "magick/client.h"
#include "magick/constitute.h"
#include "magick/delegate.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/log.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/policy.h"
#include "magick/resource_.h"
#include "magick/semaphore.h"
#include "magick/string_.h"
#include "magick/string-private.h"
#include "magick/utility.h"
#if defined(MAGICKCORE_HAVE_MMAP_FILEIO) && !defined(__WINDOWS__)
# include <sys/mman.h>
#endif
#if defined(MAGICKCORE_ZLIB_DELEGATE)
#include "zlib.h"
#endif
#if defined(MAGICKCORE_BZLIB_DELEGATE)
#include "bzlib.h"
#endif
/*
Define declarations.
*/
#define MagickMaxBlobExtent 65541
#if defined(MAGICKCORE_HAVE_FSEEKO)
# define fseek fseeko
# define ftell ftello
#endif
#if !defined(MAP_ANONYMOUS) && defined(MAP_ANON)
# define MAP_ANONYMOUS MAP_ANON
#endif
#if !defined(MAP_FAILED)
#define MAP_FAILED ((void *) -1)
#endif
#if !defined(MS_SYNC)
#define MS_SYNC 0x04
#endif
#if defined(__OS2__)
#include <io.h>
#define _O_BINARY O_BINARY
#endif
/*
Typedef declarations.
*/
struct _BlobInfo
{
size_t
length,
extent,
quantum;
MagickBooleanType
mapped,
eof;
MagickOffsetType
offset;
MagickSizeType
size;
MagickBooleanType
exempt,
synchronize,
status,
temporary;
StreamType
type;
FILE
*file;
struct stat
properties;
StreamHandler
stream;
unsigned char
*data;
MagickBooleanType
debug;
SemaphoreInfo
*semaphore;
long
reference_count;
unsigned long
signature;
};
/*
Forward declarations.
*/
static int
SyncBlob(Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ A t t a c h B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AttachBlob() attaches a blob to the BlobInfo structure.
%
% The format of the AttachBlob method is:
%
% void AttachBlob(BlobInfo *blob_info,const void *blob,const size_t length)
%
% A description of each parameter follows:
%
% o blob_info: Specifies a pointer to a BlobInfo structure.
%
% o blob: the address of a character stream in one of the image formats
% understood by ImageMagick.
%
% o length: This size_t integer reflects the length in bytes of the blob.
%
*/
MagickExport void AttachBlob(BlobInfo *blob_info,const void *blob,
const size_t length)
{
assert(blob_info != (BlobInfo *) NULL);
if (blob_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
blob_info->length=length;
blob_info->extent=length;
blob_info->quantum=(size_t) MagickMaxBlobExtent;
blob_info->offset=0;
blob_info->type=BlobStream;
blob_info->file=(FILE *) NULL;
blob_info->data=(unsigned char *) blob;
blob_info->mapped=MagickFalse;
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ B l o b T o F i l e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% BlobToFile() writes a blob to a file. It returns MagickFalse if an error
% occurs otherwise MagickTrue.
%
% The format of the BlobToFile method is:
%
% MagickBooleanType BlobToFile(char *filename,const void *blob,
% const size_t length,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o filename: Write the blob to this file.
%
% o blob: the address of a blob.
%
% o length: This length in bytes of the blob.
%
% o exception: return any errors or warnings in this structure.
%
*/
static inline size_t MagickMin(const size_t x,const size_t y)
{
if (x < y)
return(x);
return(y);
}
MagickExport MagickBooleanType BlobToFile(char *filename,const void *blob,
const size_t length,ExceptionInfo *exception)
{
int
file;
register size_t
i;
ssize_t
count;
assert(filename != (const char *) NULL);
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",filename);
assert(blob != (const void *) NULL);
if (*filename == '\0')
file=AcquireUniqueFileResource(filename);
else
file=open(filename,O_RDWR | O_CREAT | O_EXCL | O_BINARY,S_MODE);
if (file == -1)
{
ThrowFileException(exception,BlobError,"UnableToWriteBlob",filename);
return(MagickFalse);
}
for (i=0; i < length; i+=count)
{
count=(ssize_t) write(file,(const char *) blob+i,MagickMin(length-i,(size_t)
SSIZE_MAX));
if (count <= 0)
{
count=0;
if (errno != EINTR)
break;
}
}
file=close(file)-1;
if (i < length)
{
ThrowFileException(exception,BlobError,"UnableToWriteBlob",filename);
return(MagickFalse);
}
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% B l o b T o I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% BlobToImage() implements direct to memory image formats. It returns the
% blob as an image.
%
% The format of the BlobToImage method is:
%
% Image *BlobToImage(const ImageInfo *image_info,const void *blob,
% const size_t length,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o blob: the address of a character stream in one of the image formats
% understood by ImageMagick.
%
% o length: This size_t integer reflects the length in bytes of the blob.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport Image *BlobToImage(const ImageInfo *image_info,const void *blob,
const size_t length,ExceptionInfo *exception)
{
const MagickInfo
*magick_info;
Image
*image;
ImageInfo
*blob_info,
*clone_info;
MagickBooleanType
status;
assert(image_info != (ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
if ((blob == (const void *) NULL) || (length == 0))
{
(void) ThrowMagickException(exception,GetMagickModule(),BlobError,
"ZeroLengthBlobNotPermitted","`%s'",image_info->filename);
return((Image *) NULL);
}
blob_info=CloneImageInfo(image_info);
blob_info->blob=(void *) blob;
blob_info->length=length;
if (*blob_info->magick == '\0')
(void) SetImageInfo(blob_info,MagickFalse,exception);
magick_info=GetMagickInfo(blob_info->magick,exception);
if (magick_info == (const MagickInfo *) NULL)
{
blob_info=DestroyImageInfo(blob_info);
(void) ThrowMagickException(exception,GetMagickModule(),
MissingDelegateError,"NoDecodeDelegateForThisImageFormat","`%s'",
image_info->filename);
return((Image *) NULL);
}
if (GetMagickBlobSupport(magick_info) != MagickFalse)
{
/*
Native blob support for this image format.
*/
(void) CopyMagickString(blob_info->filename,image_info->filename,
MaxTextExtent);
(void) CopyMagickString(blob_info->magick,image_info->magick,
MaxTextExtent);
image=ReadImage(blob_info,exception);
if (image != (Image *) NULL)
(void) DetachBlob(image->blob);
blob_info=DestroyImageInfo(blob_info);
return(image);
}
/*
Write blob to a temporary file on disk.
*/
blob_info->blob=(void *) NULL;
blob_info->length=0;
*blob_info->filename='\0';
status=BlobToFile(blob_info->filename,blob,length,exception);
if (status == MagickFalse)
{
(void) RelinquishUniqueFileResource(blob_info->filename);
blob_info=DestroyImageInfo(blob_info);
return((Image *) NULL);
}
clone_info=CloneImageInfo(blob_info);
(void) FormatMagickString(clone_info->filename,MaxTextExtent,"%s:%s",
blob_info->magick,blob_info->filename);
image=ReadImage(clone_info,exception);
clone_info=DestroyImageInfo(clone_info);
(void) RelinquishUniqueFileResource(blob_info->filename);
blob_info=DestroyImageInfo(blob_info);
return(image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ C l o n e B l o b I n f o %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% CloneBlobInfo() makes a duplicate of the given blob info structure, or if
% blob info is NULL, a new one.
%
% The format of the CloneBlobInfo method is:
%
% BlobInfo *CloneBlobInfo(const BlobInfo *blob_info)
%
% A description of each parameter follows:
%
% o blob_info: the blob info.
%
*/
MagickExport BlobInfo *CloneBlobInfo(const BlobInfo *blob_info)
{
BlobInfo
*clone_info;
clone_info=(BlobInfo *) AcquireAlignedMemory(1,sizeof(*clone_info));
if (clone_info == (BlobInfo *) NULL)
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
GetBlobInfo(clone_info);
if (blob_info == (BlobInfo *) NULL)
return(clone_info);
clone_info->length=blob_info->length;
clone_info->extent=blob_info->extent;
clone_info->synchronize=blob_info->synchronize;
clone_info->quantum=blob_info->quantum;
clone_info->mapped=blob_info->mapped;
clone_info->eof=blob_info->eof;
clone_info->offset=blob_info->offset;
clone_info->size=blob_info->size;
clone_info->exempt=blob_info->exempt;
clone_info->status=blob_info->status;
clone_info->temporary=blob_info->temporary;
clone_info->type=blob_info->type;
clone_info->file=blob_info->file;
clone_info->properties=blob_info->properties;
clone_info->stream=blob_info->stream;
clone_info->data=blob_info->data;
clone_info->debug=IsEventLogging();
clone_info->reference_count=1;
return(clone_info);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ C l o s e B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% CloseBlob() closes a stream associated with the image.
%
% The format of the CloseBlob method is:
%
% MagickBooleanType CloseBlob(Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport MagickBooleanType CloseBlob(Image *image)
{
int
status;
/*
Close image file.
*/
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(image->blob != (BlobInfo *) NULL);
if (image->blob->type == UndefinedStream)
return(MagickTrue);
if (image->blob->synchronize != MagickFalse)
SyncBlob(image);
image->blob->size=GetBlobSize(image);
image->blob->eof=MagickFalse;
if (image->blob->exempt != MagickFalse)
{
image->blob->type=UndefinedStream;
return(MagickTrue);
}
status=0;
switch (image->blob->type)
{
case UndefinedStream:
break;
case FileStream:
case StandardStream:
case PipeStream:
{
status=ferror(image->blob->file);
break;
}
case ZipStream:
{
#if defined(MAGICKCORE_ZLIB_DELEGATE)
(void) gzerror(image->blob->file,&status);
#endif
break;
}
case BZipStream:
{
#if defined(MAGICKCORE_BZLIB_DELEGATE)
(void) BZ2_bzerror((BZFILE *) image->blob->file,&status);
#endif
break;
}
case FifoStream:
case BlobStream:
break;
}
image->blob->status=status < 0 ? MagickTrue : MagickFalse;
switch (image->blob->type)
{
case UndefinedStream:
break;
case FileStream:
case StandardStream:
{
if (image->blob->synchronize != MagickFalse)
status=fsync(fileno(image->blob->file));
status=fclose(image->blob->file);
break;
}
case PipeStream:
{
#if defined(MAGICKCORE_HAVE_PCLOSE)
status=pclose(image->blob->file);
#endif
break;
}
case ZipStream:
{
#if defined(MAGICKCORE_ZLIB_DELEGATE)
status=gzclose(image->blob->file);
#endif
break;
}
case BZipStream:
{
#if defined(MAGICKCORE_BZLIB_DELEGATE)
BZ2_bzclose((BZFILE *) image->blob->file);
#endif
break;
}
case FifoStream:
case BlobStream:
break;
}
(void) DetachBlob(image->blob);
image->blob->status=status < 0 ? MagickTrue : MagickFalse;
return(image->blob->status);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ D e s t r o y B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% DestroyBlob() deallocates memory associated with a blob.
%
% The format of the DestroyBlob method is:
%
% void DestroyBlob(Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport void DestroyBlob(Image *image)
{
MagickBooleanType
destroy;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(image->blob != (BlobInfo *) NULL);
assert(image->blob->signature == MagickSignature);
destroy=MagickFalse;
LockSemaphoreInfo(image->blob->semaphore);
image->blob->reference_count--;
assert(image->blob->reference_count >= 0);
if (image->blob->reference_count == 0)
destroy=MagickTrue;
UnlockSemaphoreInfo(image->blob->semaphore);
if (destroy == MagickFalse)
return;
(void) CloseBlob(image);
if (image->blob->mapped != MagickFalse)
(void) UnmapBlob(image->blob->data,image->blob->length);
if (image->blob->semaphore != (SemaphoreInfo *) NULL)
DestroySemaphoreInfo(&image->blob->semaphore);
image->blob->signature=(~MagickSignature);
image->blob=(BlobInfo *) RelinquishMagickMemory(image->blob);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ D e t a c h B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% DetachBlob() detaches a blob from the BlobInfo structure.
%
% The format of the DetachBlob method is:
%
% unsigned char *DetachBlob(BlobInfo *blob_info)
%
% A description of each parameter follows:
%
% o blob_info: Specifies a pointer to a BlobInfo structure.
%
*/
MagickExport unsigned char *DetachBlob(BlobInfo *blob_info)
{
unsigned char
*data;
assert(blob_info != (BlobInfo *) NULL);
if (blob_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
if (blob_info->mapped != MagickFalse)
(void) UnmapBlob(blob_info->data,blob_info->length);
blob_info->mapped=MagickFalse;
blob_info->length=0;
blob_info->offset=0;
blob_info->eof=MagickFalse;
blob_info->exempt=MagickFalse;
blob_info->type=UndefinedStream;
blob_info->file=(FILE *) NULL;
data=blob_info->data;
blob_info->data=(unsigned char *) NULL;
blob_info->stream=(StreamHandler) NULL;
return(data);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ D u p l i c a t e s B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% DuplicateBlob() duplicates a blob descriptor.
%
% The format of the DuplicateBlob method is:
%
% void DuplicateBlob(Image *image,const Image *duplicate)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o duplicate: the duplicate image.
%
*/
MagickExport void DuplicateBlob(Image *image,const Image *duplicate)
{
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(duplicate != (Image *) NULL);
assert(duplicate->signature == MagickSignature);
DestroyBlob(image);
image->blob=ReferenceBlob(duplicate->blob);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ E O F B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% EOFBlob() returns a non-zero value when EOF has been detected reading from
% a blob or file.
%
% The format of the EOFBlob method is:
%
% int EOFBlob(const Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport int EOFBlob(const Image *image)
{
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
assert(image->blob != (BlobInfo *) NULL);
assert(image->blob->type != UndefinedStream);
switch (image->blob->type)
{
case UndefinedStream:
break;
case FileStream:
case StandardStream:
case PipeStream:
{
image->blob->eof=feof(image->blob->file) != 0 ? MagickTrue : MagickFalse;
break;
}
case ZipStream:
{
image->blob->eof=MagickFalse;
break;
}
case BZipStream:
{
#if defined(MAGICKCORE_BZLIB_DELEGATE)
int
status;
status=0;
(void) BZ2_bzerror((BZFILE *) image->blob->file,&status);
image->blob->eof=status == BZ_UNEXPECTED_EOF ? MagickTrue : MagickFalse;
#endif
break;
}
case FifoStream:
{
image->blob->eof=MagickFalse;
break;
}
case BlobStream:
break;
}
return((int) image->blob->eof);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ F i l e T o B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% FileToBlob() returns the contents of a file as a blob. It returns the
% file as a blob and its length. If an error occurs, NULL is returned.
%
% The format of the FileToBlob method is:
%
% unsigned char *FileToBlob(const char *filename,const size_t extent,
% size_t *length,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o blob: FileToBlob() returns the contents of a file as a blob. If
% an error occurs NULL is returned.
%
% o filename: the filename.
%
% o extent: The maximum length of the blob.
%
% o length: On return, this reflects the actual length of the blob.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport unsigned char *FileToBlob(const char *filename,const size_t extent,
size_t *length,ExceptionInfo *exception)
{
int
file;
MagickOffsetType
offset;
register size_t
i;
ssize_t
count;
unsigned char
*blob;
void
*map;
assert(filename != (const char *) NULL);
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",filename);
assert(exception != (ExceptionInfo *) NULL);
*length=0;
file=fileno(stdin);
if (LocaleCompare(filename,"-") != 0)
file=open(filename,O_RDONLY | O_BINARY);
if (file == -1)
{
ThrowFileException(exception,BlobError,"UnableToOpenFile",filename);
return((unsigned char *) NULL);
}
offset=(MagickOffsetType) MagickSeek(file,0,SEEK_END);
count=0;
if ((offset < 0) || (offset != (MagickOffsetType) ((ssize_t) offset)))
{
size_t
quantum;
struct stat
file_info;
/*
Stream is not seekable.
*/
quantum=(size_t) MagickMaxBufferExtent;
if ((fstat(file,&file_info) == 0) && (file_info.st_size != 0))
quantum=MagickMin((size_t) file_info.st_size,MagickMaxBufferExtent);
blob=(unsigned char *) AcquireQuantumMemory(quantum,sizeof(*blob));
for (i=0; blob != (unsigned char *) NULL; i+=count)
{
count=(ssize_t) read(file,blob+i,quantum);
if (count <= 0)
{
count=0;
if (errno != EINTR)
break;
}
if (~(1UL*i) < (quantum+1))
{
blob=(unsigned char *) RelinquishMagickMemory(blob);
break;
}
blob=(unsigned char *) ResizeQuantumMemory(blob,i+quantum+1,
sizeof(*blob));
if ((size_t) (i+count) >= extent)
break;
}
file=close(file)-1;
if (blob == (unsigned char *) NULL)
{
(void) ThrowMagickException(exception,GetMagickModule(),
ResourceLimitError,"MemoryAllocationFailed","`%s'",filename);
return((unsigned char *) NULL);
}
*length=MagickMin(i+count,extent);
blob[*length]='\0';
return(blob);
}
*length=MagickMin((size_t) offset,extent);
blob=(unsigned char *) NULL;
if (~(*length) >= MaxTextExtent)
blob=(unsigned char *) AcquireQuantumMemory(*length+MaxTextExtent,
sizeof(*blob));
if (blob == (unsigned char *) NULL)
{
file=close(file)-1;
(void) ThrowMagickException(exception,GetMagickModule(),
ResourceLimitError,"MemoryAllocationFailed","`%s'",filename);
return((unsigned char *) NULL);
}
map=MapBlob(file,ReadMode,0,*length);
if (map != (unsigned char *) NULL)
{
(void) CopyMagickMemory(blob,map,*length);
(void) UnmapBlob(map,*length);
}
else
{
(void) MagickSeek(file,0,SEEK_SET);
for (i=0; i < *length; i+=count)
{
count=(ssize_t) read(file,blob+i,MagickMin(*length-i,(size_t)
SSIZE_MAX));
if (count <= 0)
{
count=0;
if (errno != EINTR)
break;
}
}
if (i < *length)
{
file=close(file)-1;
blob=(unsigned char *) RelinquishMagickMemory(blob);
ThrowFileException(exception,BlobError,"UnableToReadBlob",filename);
return((unsigned char *) NULL);
}
}
file=close(file)-1;
blob[*length]='\0';
return(blob);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% F i l e T o I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% FileToImage() write the contents of a file to an image.
%
% The format of the FileToImage method is:
%
% MagickBooleanType FileToImage(Image *,const char *filename)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o filename: the filename.
%
*/
static inline ssize_t WriteBlobStream(Image *image,const size_t length,
const unsigned char *data)
{
MagickSizeType
extent;
register unsigned char
*q;
assert(image->blob != (BlobInfo *) NULL);
if (image->blob->type != BlobStream)
return(WriteBlob(image,length,data));
assert(image->blob->type != UndefinedStream);
assert(data != (void *) NULL);
extent=(MagickSizeType) (image->blob->offset+(MagickOffsetType) length);
if (extent >= image->blob->extent)
{
image->blob->quantum<<=1;
extent=image->blob->extent+image->blob->quantum+length;
if (SetBlobExtent(image,extent) == MagickFalse)
return(0);
}
q=image->blob->data+image->blob->offset;
(void) CopyMagickMemory(q,data,length);
image->blob->offset+=length;
if (image->blob->offset >= (MagickOffsetType) image->blob->length)
image->blob->length=(size_t) image->blob->offset;
return((ssize_t) length);
}
MagickExport MagickBooleanType FileToImage(Image *image,const char *filename)
{
int
file;
size_t
length,
quantum;
ssize_t
count;
struct stat
file_info;
unsigned char
*blob;
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
assert(filename != (const char *) NULL);
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",filename);
file=open(filename,O_RDONLY | O_BINARY);
if (file == -1)
{
ThrowFileException(&image->exception,BlobError,"UnableToOpenBlob",
filename);
return(MagickFalse);
}
quantum=(size_t) MagickMaxBufferExtent;
if ((fstat(file,&file_info) == 0) && (file_info.st_size != 0))
quantum=MagickMin((size_t) file_info.st_size,MagickMaxBufferExtent);
blob=(unsigned char *) AcquireQuantumMemory(quantum,sizeof(*blob));
if (blob == (unsigned char *) NULL)
{
ThrowFileException(&image->exception,ResourceLimitError,
"MemoryAllocationFailed",filename);
return(MagickFalse);
}
for ( ; ; )
{
count=(ssize_t) read(file,blob,quantum);
if (count <= 0)
{
count=0;
if (errno != EINTR)
break;
}
length=(size_t) count;
count=WriteBlobStream(image,length,blob);
if (count != (ssize_t) length)
{
ThrowFileException(&image->exception,BlobError,"UnableToWriteBlob",
filename);
break;
}
}
file=close(file)-1;
blob=(unsigned char *) RelinquishMagickMemory(blob);
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ G e t B l o b E r r o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetBlobError() returns MagickTrue if the blob associated with the specified
% image encountered an error.
%
% The format of the GetBlobError method is:
%
% MagickBooleanType GetBlobError(const Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport MagickBooleanType GetBlobError(const Image *image)
{
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
return(image->blob->status);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ G e t B l o b F i l e H a n d l e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetBlobFileHandle() returns the file handle associated with the image blob.
%
% The format of the GetBlobFile method is:
%
% FILE *GetBlobFileHandle(const Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport FILE *GetBlobFileHandle(const Image *image)
{
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
return(image->blob->file);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ G e t B l o b I n f o %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetBlobInfo() initializes the BlobInfo structure.
%
% The format of the GetBlobInfo method is:
%
% void GetBlobInfo(BlobInfo *blob_info)
%
% A description of each parameter follows:
%
% o blob_info: Specifies a pointer to a BlobInfo structure.
%
*/
MagickExport void GetBlobInfo(BlobInfo *blob_info)
{
assert(blob_info != (BlobInfo *) NULL);
(void) ResetMagickMemory(blob_info,0,sizeof(*blob_info));
blob_info->type=UndefinedStream;
blob_info->quantum=(size_t) MagickMaxBlobExtent;
blob_info->properties.st_mtime=time((time_t *) NULL);
blob_info->properties.st_ctime=time((time_t *) NULL);
blob_info->debug=IsEventLogging();
blob_info->reference_count=1;
blob_info->semaphore=AllocateSemaphoreInfo();
blob_info->signature=MagickSignature;
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t B l o b P r o p e r t i e s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetBlobProperties() returns information about an image blob.
%
% The format of the GetBlobProperties method is:
%
% const struct stat *GetBlobProperties(const Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport const struct stat *GetBlobProperties(const Image *image)
{
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
return(&image->blob->properties);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ G e t B l o b S i z e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetBlobSize() returns the current length of the image file or blob; zero is
% returned if the size cannot be determined.
%
% The format of the GetBlobSize method is:
%
% MagickSizeType GetBlobSize(const Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport MagickSizeType GetBlobSize(const Image *image)
{
MagickSizeType
length;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(image->blob != (BlobInfo *) NULL);
length=0;
switch (image->blob->type)
{
case UndefinedStream:
{
length=image->blob->size;
break;
}
case FileStream:
{
if (fstat(fileno(image->blob->file),&image->blob->properties) == 0)
length=(MagickSizeType) image->blob->properties.st_size;
break;
}
case StandardStream:
case PipeStream:
{
length=image->blob->size;
break;
}
case ZipStream:
case BZipStream:
{
MagickBooleanType
status;
status=GetPathAttributes(image->filename,&image->blob->properties);
if (status != MagickFalse)
length=(MagickSizeType) image->blob->properties.st_size;
break;
}
case FifoStream:
break;
case BlobStream:
{
length=(MagickSizeType) image->blob->length;
break;
}
}
return(length);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ G e t B l o b S t r e a m D a t a %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetBlobStreamData() returns the stream data for the image.
%
% The format of the GetBlobStreamData method is:
%
% unsigned char *GetBlobStreamData(const Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport unsigned char *GetBlobStreamData(const Image *image)
{
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
return(image->blob->data);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ G e t B l o b S t r e a m H a n d l e r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetBlobStreamHandler() returns the stream handler for the image.
%
% The format of the GetBlobStreamHandler method is:
%
% StreamHandler GetBlobStreamHandler(const Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport StreamHandler GetBlobStreamHandler(const Image *image)
{
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
return(image->blob->stream);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I m a g e T o B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ImageToBlob() implements direct to memory image formats. It returns the
% image as a blob and its length. The magick member of the ImageInfo structure
% determines the format of the returned blob (GIF, JPEG, PNG, etc.)
%
% The format of the ImageToBlob method is:
%
% unsigned char *ImageToBlob(const ImageInfo *image_info,Image *image,
% size_t *length,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o image: the image.
%
% o length: This pointer to a size_t integer sets the initial length of the
% blob. On return, it reflects the actual length of the blob.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport unsigned char *ImageToBlob(const ImageInfo *image_info,
Image *image,size_t *length,ExceptionInfo *exception)
{
const MagickInfo
*magick_info;
ImageInfo
*blob_info;
MagickBooleanType
status;
unsigned char
*blob;
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
assert(exception != (ExceptionInfo *) NULL);
*length=0;
blob=(unsigned char *) NULL;
blob_info=CloneImageInfo(image_info);
blob_info->adjoin=MagickFalse;
(void) SetImageInfo(blob_info,MagickTrue,exception);
if (*blob_info->magick != '\0')
(void) CopyMagickString(image->magick,blob_info->magick,MaxTextExtent);
magick_info=GetMagickInfo(image->magick,exception);
if (magick_info == (const MagickInfo *) NULL)
{
(void) ThrowMagickException(exception,GetMagickModule(),
MissingDelegateError,"NoDecodeDelegateForThisImageFormat","`%s'",
image->filename);
return(blob);
}
(void) CopyMagickString(blob_info->magick,image->magick,MaxTextExtent);
if (GetMagickBlobSupport(magick_info) != MagickFalse)
{
/*
Native blob support for this image format.
*/
blob_info->length=0;
blob_info->blob=(void *) AcquireQuantumMemory(MagickMaxBlobExtent,
sizeof(unsigned char));
if (blob_info->blob == (void *) NULL)
(void) ThrowMagickException(exception,GetMagickModule(),
ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
else
{
(void) CloseBlob(image);
image->blob->exempt=MagickTrue;
*image->filename='\0';
status=WriteImage(blob_info,image);
if ((status == MagickFalse) || (image->blob->length == 0))
InheritException(exception,&image->exception);
else
{
*length=image->blob->length;
blob=DetachBlob(image->blob);
blob=(unsigned char *) ResizeQuantumMemory(blob,*length,
sizeof(*blob));
}
}
}
else
{
char
unique[MaxTextExtent];
int
file;
/*
Write file to disk in blob image format.
*/
file=AcquireUniqueFileResource(unique);
if (file == -1)
{
ThrowFileException(exception,BlobError,"UnableToWriteBlob",
image_info->filename);
}
else
{
blob_info->file=fdopen(file,"wb");
if (blob_info->file != (FILE *) NULL)
{
(void) FormatMagickString(image->filename,MaxTextExtent,"%s:%s",
image->magick,unique);
status=WriteImage(blob_info,image);
(void) fclose(blob_info->file);
if (status == MagickFalse)
InheritException(exception,&image->exception);
else
blob=FileToBlob(image->filename,~0UL,length,exception);
}
(void) RelinquishUniqueFileResource(unique);
}
}
blob_info=DestroyImageInfo(blob_info);
return(blob);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I m a g e T o F i l e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ImageToFile() writes an image to a file. It returns MagickFalse if an error
% occurs otherwise MagickTrue.
%
% The format of the ImageToFile method is:
%
% MagickBooleanType ImageToFile(Image *image,char *filename,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o filename: Write the image to this file.
%
% o exception: return any errors or warnings in this structure.
%
*/
static inline const unsigned char *ReadBlobStream(Image *image,
const size_t length,unsigned char *data,ssize_t *count)
{
assert(count != (ssize_t *) NULL);
assert(image->blob != (BlobInfo *) NULL);
if (image->blob->type != BlobStream)
{
*count=ReadBlob(image,length,data);
return(data);
}
if (image->blob->offset >= (MagickOffsetType) image->blob->length)
{
*count=0;
image->blob->eof=MagickTrue;
return(data);
}
data=image->blob->data+image->blob->offset;
*count=(ssize_t) MagickMin(length,(size_t) (image->blob->length-
image->blob->offset));
image->blob->offset+=(*count);
if (*count != (ssize_t) length)
image->blob->eof=MagickTrue;
return(data);
}
MagickExport MagickBooleanType ImageToFile(Image *image,char *filename,
ExceptionInfo *exception)
{
int
file;
register const unsigned char
*p;
register size_t
i;
size_t
length,
quantum;
ssize_t
count;
struct stat
file_info;
unsigned char
*buffer;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
assert(image->blob != (BlobInfo *) NULL);
assert(image->blob->type != UndefinedStream);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",filename);
assert(filename != (const char *) NULL);
if (*filename == '\0')
file=AcquireUniqueFileResource(filename);
else
if (LocaleCompare(filename,"-") == 0)
file=fileno(stdout);
else
file=open(filename,O_RDWR | O_CREAT | O_EXCL | O_BINARY,S_MODE);
if (file == -1)
{
ThrowFileException(exception,BlobError,"UnableToWriteBlob",filename);
return(MagickFalse);
}
quantum=(size_t) MagickMaxBufferExtent;
if ((fstat(file,&file_info) == 0) && (file_info.st_size != 0))
quantum=MagickMin((size_t) file_info.st_size,MagickMaxBufferExtent);
buffer=(unsigned char *) AcquireQuantumMemory(quantum,sizeof(*buffer));
if (buffer == (unsigned char *) NULL)
{
file=close(file)-1;
(void) ThrowMagickException(exception,GetMagickModule(),
ResourceLimitError,"MemoryAllocationError","`%s'",filename);
return(MagickFalse);
}
length=0;
p=ReadBlobStream(image,quantum,buffer,&count);
for (i=0; count > 0; p=ReadBlobStream(image,quantum,buffer,&count))
{
length=(size_t) count;
for (i=0; i < length; i+=count)
{
count=write(file,p+i,(size_t) (length-i));
if (count <= 0)
{
count=0;
if (errno != EINTR)
break;
}
}
if (i < length)
break;
}
file=close(file)-1;
buffer=(unsigned char *) RelinquishMagickMemory(buffer);
if (i < length)
{
ThrowFileException(exception,BlobError,"UnableToWriteBlob",filename);
return(MagickFalse);
}
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I m a g e s T o B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ImagesToBlob() implements direct to memory image formats. It returns the
% image sequence as a blob and its length. The magick member of the ImageInfo
% structure determines the format of the returned blob (GIF, JPEG, PNG, etc.)
%
% Note, some image formats do not permit multiple images to the same image
% stream (e.g. JPEG). in this instance, just the first image of the
% sequence is returned as a blob.
%
% The format of the ImagesToBlob method is:
%
% unsigned char *ImagesToBlob(const ImageInfo *image_info,Image *images,
% size_t *length,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o images: the image list.
%
% o length: This pointer to a size_t integer sets the initial length of the
% blob. On return, it reflects the actual length of the blob.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport unsigned char *ImagesToBlob(const ImageInfo *image_info,
Image *images,size_t *length,ExceptionInfo *exception)
{
const MagickInfo
*magick_info;
ImageInfo
*blob_info;
MagickBooleanType
status;
unsigned char
*blob;
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(images != (Image *) NULL);
assert(images->signature == MagickSignature);
assert(exception != (ExceptionInfo *) NULL);
*length=0;
blob=(unsigned char *) NULL;
blob_info=CloneImageInfo(image_info);
(void) SetImageInfo(blob_info,MagickTrue,exception);
if (*blob_info->magick != '\0')
(void) CopyMagickString(images->magick,blob_info->magick,MaxTextExtent);
if (blob_info->adjoin == MagickFalse)
{
blob_info=DestroyImageInfo(blob_info);
return(ImageToBlob(image_info,images,length,exception));
}
magick_info=GetMagickInfo(images->magick,exception);
if (magick_info == (const MagickInfo *) NULL)
{
(void) ThrowMagickException(exception,GetMagickModule(),
MissingDelegateError,"NoDecodeDelegateForThisImageFormat","`%s'",
images->filename);
return(blob);
}
(void) CopyMagickString(blob_info->magick,images->magick,MaxTextExtent);
if (GetMagickBlobSupport(magick_info) != MagickFalse)
{
/*
Native blob support for this images format.
*/
blob_info->length=0;
blob_info->blob=(void *) AcquireQuantumMemory(MagickMaxBlobExtent,
sizeof(unsigned char));
if (blob_info->blob == (void *) NULL)
(void) ThrowMagickException(exception,GetMagickModule(),
ResourceLimitError,"MemoryAllocationFailed","`%s'",images->filename);
else
{
images->blob->exempt=MagickTrue;
*images->filename='\0';
status=WriteImages(blob_info,images,images->filename,exception);
if ((status == MagickFalse) || (images->blob->length == 0))
InheritException(exception,&images->exception);
else
{
*length=images->blob->length;
blob=DetachBlob(images->blob);
blob=(unsigned char *) ResizeQuantumMemory(blob,*length,
sizeof(*blob));
}
}
}
else
{
char
filename[MaxTextExtent],
unique[MaxTextExtent];
int
file;
/*
Write file to disk in blob images format.
*/
file=AcquireUniqueFileResource(unique);
if (file == -1)
{
ThrowFileException(exception,FileOpenError,"UnableToWriteBlob",
image_info->filename);
}
else
{
blob_info->file=fdopen(file,"wb");
if (blob_info->file != (FILE *) NULL)
{
(void) FormatMagickString(filename,MaxTextExtent,"%s:%s",
images->magick,unique);
status=WriteImages(blob_info,images,filename,exception);
(void) fclose(blob_info->file);
if (status == MagickFalse)
InheritException(exception,&images->exception);
else
blob=FileToBlob(images->filename,~0UL,length,exception);
}
(void) RelinquishUniqueFileResource(unique);
}
}
blob_info=DestroyImageInfo(blob_info);
return(blob);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I n j e c t I m a g e B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% InjectImageBlob() injects the image with a copy of itself in the specified
% format (e.g. inject JPEG into a PDF image).
%
% The format of the InjectImageBlob method is:
%
% MagickBooleanType InjectImageBlob(const ImageInfo *image_info,
% Image *image,Image *inject_image,const char *format,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info..
%
% o image: the image.
%
% o inject_image: inject into the image stream.
%
% o format: the image format.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType InjectImageBlob(const ImageInfo *image_info,
Image *image,Image *inject_image,const char *format,ExceptionInfo *exception)
{
char
filename[MaxTextExtent];
FILE
*unique_file;
Image
*byte_image;
ImageInfo
*write_info;
int
file;
MagickBooleanType
status;
register long
i;
size_t
quantum;
ssize_t
count;
struct stat
file_info;
unsigned char
*buffer;
/*
Write inject image to a temporary file.
*/
assert(image_info != (ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(inject_image != (Image *) NULL);
assert(inject_image->signature == MagickSignature);
assert(exception != (ExceptionInfo *) NULL);
unique_file=(FILE *) NULL;
file=AcquireUniqueFileResource(filename);
if (file != -1)
unique_file=fdopen(file,"wb");
if ((file == -1) || (unique_file == (FILE *) NULL))
{
(void) CopyMagickString(image->filename,filename,MaxTextExtent);
ThrowFileException(exception,FileOpenError,"UnableToCreateTemporaryFile",
image->filename);
return(MagickFalse);
}
byte_image=CloneImage(inject_image,0,0,MagickFalse,exception);
if (byte_image == (Image *) NULL)
{
(void) fclose(unique_file);
(void) RelinquishUniqueFileResource(filename);
return(MagickFalse);
}
(void) FormatMagickString(byte_image->filename,MaxTextExtent,"%s:%s",format,
filename);
DestroyBlob(byte_image);
byte_image->blob=CloneBlobInfo((BlobInfo *) NULL);
write_info=CloneImageInfo(image_info);
SetImageInfoFile(write_info,unique_file);
status=WriteImage(write_info,byte_image);
write_info=DestroyImageInfo(write_info);
byte_image=DestroyImage(byte_image);
(void) fclose(unique_file);
if (status == MagickFalse)
{
(void) RelinquishUniqueFileResource(filename);
return(MagickFalse);
}
/*
Inject into image stream.
*/
file=open(filename,O_RDONLY | O_BINARY);
if (file == -1)
{
(void) RelinquishUniqueFileResource(filename);
ThrowFileException(exception,FileOpenError,"UnableToOpenFile",
image_info->filename);
return(MagickFalse);
}
quantum=(size_t) MagickMaxBufferExtent;
if ((fstat(file,&file_info) == 0) && (file_info.st_size != 0))
quantum=MagickMin((size_t) file_info.st_size,MagickMaxBufferExtent);
buffer=(unsigned char *) AcquireQuantumMemory(quantum,sizeof(*buffer));
if (buffer == (unsigned char *) NULL)
{
(void) RelinquishUniqueFileResource(filename);
ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
image->filename);
}
for (i=0; ; i+=count)
{
count=(ssize_t) read(file,buffer,quantum);
if (count <= 0)
{
count=0;
if (errno != EINTR)
break;
}
status=WriteBlobStream(image,(size_t) count,buffer) == count ? MagickTrue :
MagickFalse;
}
file=close(file)-1;
(void) RelinquishUniqueFileResource(filename);
buffer=(unsigned char *) RelinquishMagickMemory(buffer);
return(status);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ I s B l o b E x e m p t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsBlobExempt() returns true if the blob is exempt.
%
% The format of the IsBlobExempt method is:
%
% MagickBooleanType IsBlobExempt(const Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport MagickBooleanType IsBlobExempt(const Image *image)
{
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
return(image->blob->exempt);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ I s B l o b S e e k a b l e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsBlobSeekable() returns true if the blob is seekable.
%
% The format of the IsBlobSeekable method is:
%
% MagickBooleanType IsBlobSeekable(const Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport MagickBooleanType IsBlobSeekable(const Image *image)
{
MagickBooleanType
seekable;
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
seekable=(image->blob->type == FileStream) ||
(image->blob->type == BlobStream) ? MagickTrue : MagickFalse;
return(seekable);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ I s B l o b T e m p o r a r y %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsBlobTemporary() returns true if the blob is temporary.
%
% The format of the IsBlobTemporary method is:
%
% MagickBooleanType IsBlobTemporary(const Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport MagickBooleanType IsBlobTemporary(const Image *image)
{
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
return(image->blob->temporary);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ M a p B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% MapBlob() creates a mapping from a file to a binary large object.
%
% The format of the MapBlob method is:
%
% unsigned char *MapBlob(int file,const MapMode mode,
% const MagickOffsetType offset,const size_t length)
%
% A description of each parameter follows:
%
% o file: map this file descriptor.
%
% o mode: ReadMode, WriteMode, or IOMode.
%
% o offset: starting at this offset within the file.
%
% o length: the length of the mapping is returned in this pointer.
%
*/
MagickExport unsigned char *MapBlob(int file,const MapMode mode,
const MagickOffsetType offset,const size_t length)
{
#if defined(MAGICKCORE_HAVE_MMAP_FILEIO)
int
flags,
protection;
unsigned char
*map;
/*
Map file.
*/
flags=0;
if (file == -1)
#if defined(MAP_ANONYMOUS)
flags|=MAP_ANONYMOUS;
#else
return((unsigned char *) NULL);
#endif
switch (mode)
{
case ReadMode:
default:
{
protection=PROT_READ;
flags|=MAP_PRIVATE;
map=(unsigned char *) mmap((char *) NULL,length,protection,flags,file,
(off_t) offset);
break;
}
case WriteMode:
{
protection=PROT_WRITE;
flags|=MAP_SHARED;
map=(unsigned char *) mmap((char *) NULL,length,protection,flags,file,
(off_t) offset);
break;
}
case IOMode:
{
protection=PROT_READ | PROT_WRITE;
flags|=MAP_SHARED;
map=(unsigned char *) mmap((char *) NULL,length,protection,flags,file,
(off_t) offset);
break;
}
}
if (map == (unsigned char *) MAP_FAILED)
return((unsigned char *) NULL);
return(map);
#else
(void) file;
(void) mode;
(void) offset;
(void) length;
return((unsigned char *) NULL);
#endif
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ M S B O r d e r L o n g %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% MSBOrderLong() converts a least-significant byte first buffer of integers to
% most-significant byte first.
%
% The format of the MSBOrderLong method is:
%
% void MSBOrderLong(unsigned char *buffer,const size_t length)
%
% A description of each parameter follows.
%
% o buffer: Specifies a pointer to a buffer of integers.
%
% o length: Specifies the length of the buffer.
%
*/
MagickExport void MSBOrderLong(unsigned char *buffer,const size_t length)
{
int
c;
register unsigned char
*p,
*q;
assert(buffer != (unsigned char *) NULL);
q=buffer+length;
while (buffer < q)
{
p=buffer+3;
c=(int) (*p);
*p=(*buffer);
*buffer++=(unsigned char) c;
p=buffer+1;
c=(int) (*p);
*p=(*buffer);
*buffer++=(unsigned char) c;
buffer+=2;
}
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ M S B O r d e r S h o r t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% MSBOrderShort() converts a least-significant byte first buffer of integers
% to most-significant byte first.
%
% The format of the MSBOrderShort method is:
%
% void MSBOrderShort(unsigned char *p,const size_t length)
%
% A description of each parameter follows.
%
% o p: Specifies a pointer to a buffer of integers.
%
% o length: Specifies the length of the buffer.
%
*/
MagickExport void MSBOrderShort(unsigned char *p,const size_t length)
{
int
c;
register unsigned char
*q;
assert(p != (unsigned char *) NULL);
q=p+length;
while (p < q)
{
c=(int) (*p);
*p=(*(p+1));
p++;
*p++=(unsigned char) c;
}
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ O p e n B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% OpenBlob() opens a file associated with the image. A file name of '-' sets
% the file to stdin for type 'r' and stdout for type 'w'. If the filename
% suffix is '.gz' or '.Z', the image is decompressed for type 'r' and
% compressed for type 'w'. If the filename prefix is '|', it is piped to or
% from a system command.
%
% The format of the OpenBlob method is:
%
% MagickBooleanType OpenBlob(const ImageInfo *image_info,Image *image,
% const BlobMode mode,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o image: the image.
%
% o mode: the mode for opening the file.
%
*/
MagickExport MagickBooleanType OpenBlob(const ImageInfo *image_info,
Image *image,const BlobMode mode,ExceptionInfo *exception)
{
char
filename[MaxTextExtent];
const char
*type;
MagickBooleanType
status;
PolicyRights
rights;
assert(image_info != (ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image_info->blob != (void *) NULL)
{
if (image_info->stream != (StreamHandler) NULL)
image->blob->stream=(StreamHandler) image_info->stream;
AttachBlob(image->blob,image_info->blob,image_info->length);
return(MagickTrue);
}
(void) DetachBlob(image->blob);
switch (mode)
{
default: type="r"; break;
case ReadBlobMode: type="r"; break;
case ReadBinaryBlobMode: type="rb"; break;
case WriteBlobMode: type="w"; break;
case WriteBinaryBlobMode: type="w+b"; break;
case AppendBlobMode: type="a"; break;
case AppendBinaryBlobMode: type="a+b"; break;
}
if (*type != 'r')
image->blob->synchronize=image_info->synchronize;
if (image_info->stream != (StreamHandler) NULL)
{
image->blob->stream=(StreamHandler) image_info->stream;
if (*type == 'w')
{
image->blob->type=FifoStream;
return(MagickTrue);
}
}
/*
Open image file.
*/
*filename='\0';
(void) CopyMagickString(filename,image->filename,MaxTextExtent);
rights=ReadPolicyRights;
if (*type == 'w')
rights=WritePolicyRights;
if (IsRightsAuthorized(PathPolicyDomain,rights,filename) == MagickFalse)
{
errno=EPERM;
(void) ThrowMagickException(exception,GetMagickModule(),PolicyError,
"NotAuthorized","`%s'",filename);
return(MagickFalse);
}
if ((LocaleCompare(filename,"-") == 0) ||
((*filename == '\0') && (image_info->file == (FILE *) NULL)))
{
image->blob->file=(*type == 'r') ? stdin : stdout;
#if defined(__WINDOWS__) || defined(__OS2__)
if (strchr(type,'b') != (char *) NULL)
setmode(_fileno(image->blob->file),_O_BINARY);
#endif
image->blob->type=StandardStream;
image->blob->exempt=MagickTrue;
return(MagickTrue);
}
if (LocaleNCompare(filename,"fd:",3) == 0)
{
char
mode[MaxTextExtent];
*mode=(*type);
mode[1]='\0';
image->blob->file=fdopen(StringToLong(filename+3),mode);
#if defined(__WINDOWS__) || defined(__OS2__)
if (strchr(type,'b') != (char *) NULL)
setmode(_fileno(image->blob->file),_O_BINARY);
#endif
image->blob->type=StandardStream;
image->blob->exempt=MagickTrue;
return(MagickTrue);
}
#if defined(MAGICKCORE_HAVE_POPEN)
if (*filename == '|')
{
char
mode[MaxTextExtent];
/*
Pipe image to or from a system command.
*/
#if defined(SIGPIPE)
if (*type == 'w')
(void) signal(SIGPIPE,SIG_IGN);
#endif
*mode=(*type);
mode[1]='\0';
image->blob->file=(FILE *) popen(filename+1,mode);
if (image->blob->file == (FILE *) NULL)
{
ThrowFileException(exception,BlobError,"UnableToOpenBlob",filename);
return(MagickFalse);
}
image->blob->type=PipeStream;
image->blob->exempt=MagickTrue;
return(MagickTrue);
}
#endif
status=GetPathAttributes(filename,&image->blob->properties);
#if defined(S_ISFIFO)
if ((status == MagickTrue) && S_ISFIFO(image->blob->properties.st_mode))
{
image->blob->file=(FILE *) OpenMagickStream(filename,type);
if (image->blob->file == (FILE *) NULL)
{
ThrowFileException(exception,BlobError,"UnableToOpenBlob",filename);
return(MagickFalse);
}
image->blob->type=FileStream;
image->blob->exempt=MagickTrue;
return(MagickTrue);
}
#endif
if (*type == 'w')
{
/*
Form filename for multi-part images.
*/
(void) InterpretImageFilename(image_info,image,image->filename,(int)
image->scene,filename);
if (image_info->adjoin == MagickFalse)
if ((image->previous != (Image *) NULL) ||
(GetNextImageInList(image) != (Image *) NULL))
{
if (LocaleCompare(filename,image->filename) == 0)
{
char
extension[MaxTextExtent],
path[MaxTextExtent];
GetPathComponent(image->filename,RootPath,path);
GetPathComponent(image->filename,ExtensionPath,extension);
if (*extension == '\0')
(void) FormatMagickString(filename,MaxTextExtent,"%s-%lu",
path,image->scene);
else
(void) FormatMagickString(filename,MaxTextExtent,"%s-%lu.%s",
path,image->scene,extension);
}
}
(void) CopyMagickString(image->filename,filename,MaxTextExtent);
#if defined(macintosh)
SetApplicationType(filename,image_info->magick,'8BIM');
#endif
}
#if defined(MAGICKCORE_ZLIB_DELEGATE)
if (((strlen(filename) > 2) &&
(LocaleCompare(filename+strlen(filename)-2,".Z") == 0)) ||
((strlen(filename) > 3) &&
(LocaleCompare(filename+strlen(filename)-3,".gz") == 0)) ||
((strlen(filename) > 4) &&
(LocaleCompare(filename+strlen(filename)-4,".wmz") == 0)) ||
((strlen(filename) > 5) &&
(LocaleCompare(filename+strlen(filename)-5,".svgz") == 0)))
{
image->blob->file=(FILE *) gzopen(filename,type);
if (image->blob->file != (FILE *) NULL)
image->blob->type=ZipStream;
}
else
#endif
#if defined(MAGICKCORE_BZLIB_DELEGATE)
if ((strlen(filename) > 4) &&
(LocaleCompare(filename+strlen(filename)-4,".bz2") == 0))
{
image->blob->file=(FILE *) BZ2_bzopen(filename,type);
if (image->blob->file != (FILE *) NULL)
image->blob->type=BZipStream;
}
else
#endif
if (image_info->file != (FILE *) NULL)
{
image->blob->file=image_info->file;
image->blob->type=FileStream;
image->blob->exempt=MagickTrue;
}
else
{
image->blob->file=(FILE *) OpenMagickStream(filename,type);
if (image->blob->file != (FILE *) NULL)
{
image->blob->type=FileStream;
#if defined(MAGICKCORE_HAVE_SETVBUF)
(void) setvbuf(image->blob->file,(char *) NULL,(int) _IOFBF,
16384);
#endif
if (*type == 'r')
{
size_t
count;
unsigned char
magick[3];
(void) ResetMagickMemory(magick,0,sizeof(magick));
count=fread(magick,1,sizeof(magick),image->blob->file);
(void) rewind(image->blob->file);
(void) LogMagickEvent(BlobEvent,GetMagickModule(),
" read %ld magic header bytes",(long) count);
#if defined(MAGICKCORE_ZLIB_DELEGATE)
if (((int) magick[0] == 0x1F) && ((int) magick[1] == 0x8B) &&
((int) magick[2] == 0x08))
{
(void) fclose(image->blob->file);
image->blob->file=(FILE *) gzopen(filename,type);
if (image->blob->file != (FILE *) NULL)
image->blob->type=ZipStream;
}
#endif
#if defined(MAGICKCORE_BZLIB_DELEGATE)
if (strncmp((char *) magick,"BZh",3) == 0)
{
(void) fclose(image->blob->file);
image->blob->file=(FILE *) BZ2_bzopen(filename,type);
if (image->blob->file != (FILE *) NULL)
image->blob->type=BZipStream;
}
#endif
}
}
}
if ((image->blob->type == FileStream) && (*type == 'r'))
{
const MagickInfo
*magick_info;
ExceptionInfo
*sans_exception;
struct stat
*properties;
sans_exception=AcquireExceptionInfo();
magick_info=GetMagickInfo(image_info->magick,sans_exception);
sans_exception=DestroyExceptionInfo(sans_exception);
properties=(&image->blob->properties);
if ((magick_info != (const MagickInfo *) NULL) &&
(GetMagickBlobSupport(magick_info) != MagickFalse) &&
(properties->st_size <= MagickMaxBufferExtent))
{
size_t
length;
void
*blob;
length=(size_t) properties->st_size;
blob=MapBlob(fileno(image->blob->file),ReadMode,0,length);
if (blob != (void *) NULL)
{
/*
Format supports blobs-- use memory-mapped I/O.
*/
if (image_info->file != (FILE *) NULL)
image->blob->exempt=MagickFalse;
else
{
(void) fclose(image->blob->file);
image->blob->file=(FILE *) NULL;
}
AttachBlob(image->blob,blob,length);
image->blob->mapped=MagickTrue;
}
}
}
image->blob->status=MagickFalse;
if (image->blob->type != UndefinedStream)
image->blob->size=GetBlobSize(image);
else
{
ThrowFileException(exception,BlobError,"UnableToOpenBlob",filename);
return(MagickFalse);
}
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ P i n g B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PingBlob() returns all the attributes of an image or image sequence except
% for the pixels. It is much faster and consumes far less memory than
% BlobToImage(). On failure, a NULL image is returned and exception
% describes the reason for the failure.
%
% The format of the PingBlob method is:
%
% Image *PingBlob(const ImageInfo *image_info,const void *blob,
% const size_t length,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o blob: the address of a character stream in one of the image formats
% understood by ImageMagick.
%
% o length: This size_t integer reflects the length in bytes of the blob.
%
% o exception: return any errors or warnings in this structure.
%
*/
#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif
static size_t PingStream(const Image *magick_unused(image),
const void *magick_unused(pixels),const size_t columns)
{
return(columns);
}
#if defined(__cplusplus) || defined(c_plusplus)
}
#endif
MagickExport Image *PingBlob(const ImageInfo *image_info,const void *blob,
const size_t length,ExceptionInfo *exception)
{
Image
*image;
ImageInfo
*ping_info;
assert(image_info != (ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
if ((blob == (const void *) NULL) || (length == 0))
{
(void) ThrowMagickException(exception,GetMagickModule(),BlobError,
"UnrecognizedImageFormat","`%s'",image_info->magick);
return((Image *) NULL);
}
ping_info=CloneImageInfo(image_info);
ping_info->blob=(void *) AcquireQuantumMemory(length,sizeof(unsigned char));
if (ping_info->blob == (const void *) NULL)
{
(void) ThrowMagickException(exception,GetMagickModule(),
ResourceLimitFatalError,"MemoryAllocationFailed","`%s'","");
return((Image *) NULL);
}
(void) CopyMagickMemory(ping_info->blob,blob,length);
ping_info->length=length;
ping_info->ping=MagickTrue;
image=ReadStream(ping_info,&PingStream,exception);
ping_info->blob=(void *) RelinquishMagickMemory(ping_info->blob);
ping_info=DestroyImageInfo(ping_info);
return(image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlob() reads data from the blob or image file and returns it. It
% returns the number of bytes read.
%
% The format of the ReadBlob method is:
%
% ssize_t ReadBlob(Image *image,const size_t length,unsigned char *data)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o length: Specifies an integer representing the number of bytes to read
% from the file.
%
% o data: Specifies an area to place the information requested from the
% file.
%
*/
MagickExport ssize_t ReadBlob(Image *image,const size_t length,
unsigned char *data)
{
int
c;
register unsigned char
*q;
ssize_t
count;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
assert(image->blob != (BlobInfo *) NULL);
assert(image->blob->type != UndefinedStream);
if (length == 0)
return(0);
assert(data != (void *) NULL);
count=0;
q=data;
switch (image->blob->type)
{
case UndefinedStream:
break;
case FileStream:
case StandardStream:
case PipeStream:
{
switch (length)
{
default:
{
count=(ssize_t) fread(q,1,length,image->blob->file);
break;
}
case 2:
{
c=getc(image->blob->file);
if (c == EOF)
break;
*q++=(unsigned char) c;
count++;
}
case 1:
{
c=getc(image->blob->file);
if (c == EOF)
break;
*q++=(unsigned char) c;
count++;
}
case 0:
break;
}
break;
}
case ZipStream:
{
#if defined(MAGICKCORE_ZLIB_DELEGATE)
switch (length)
{
default:
{
count=(ssize_t) gzread(image->blob->file,q,(unsigned int) length);
break;
}
case 2:
{
c=gzgetc(image->blob->file);
if (c == EOF)
break;
*q++=(unsigned char) c;
count++;
}
case 1:
{
c=gzgetc(image->blob->file);
if (c == EOF)
break;
*q++=(unsigned char) c;
count++;
}
case 0:
break;
}
#endif
break;
}
case BZipStream:
{
#if defined(MAGICKCORE_BZLIB_DELEGATE)
count=(ssize_t) BZ2_bzread((BZFILE *) image->blob->file,q,(int) length);
#endif
break;
}
case FifoStream:
break;
case BlobStream:
{
register const unsigned char
*p;
if (image->blob->offset >= (MagickOffsetType) image->blob->length)
{
image->blob->eof=MagickTrue;
break;
}
p=image->blob->data+image->blob->offset;
count=(ssize_t) MagickMin(length,(size_t) (image->blob->length-
image->blob->offset));
image->blob->offset+=count;
if (count != (ssize_t) length)
image->blob->eof=MagickTrue;
(void) CopyMagickMemory(q,p,(size_t) count);
break;
}
}
return(count);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b B y t e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobByte() reads a single byte from the image file and returns it.
%
% The format of the ReadBlobByte method is:
%
% int ReadBlobByte(Image *image)
%
% A description of each parameter follows.
%
% o image: the image.
%
*/
MagickExport int ReadBlobByte(Image *image)
{
register const unsigned char
*p;
ssize_t
count;
unsigned char
buffer[1];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
p=ReadBlobStream(image,1,buffer,&count);
if (count != 1)
return(EOF);
return((int) (*p));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b D o u b l e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobDouble() reads a double value as a 64-bit quantity in the byte-order
% specified by the endian member of the image structure.
%
% The format of the ReadBlobDouble method is:
%
% double ReadBlobDouble(Image *image)
%
% A description of each parameter follows.
%
% o image: the image.
%
*/
MagickExport double ReadBlobDouble(Image *image)
{
union
{
MagickSizeType
unsigned_value;
double
double_value;
} quantum;
quantum.double_value=0.0;
quantum.unsigned_value=ReadBlobLongLong(image);
return(quantum.double_value);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b F l o a t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobFloat() reads a float value as a 32-bit quantity in the byte-order
% specified by the endian member of the image structure.
%
% The format of the ReadBlobFloat method is:
%
% float ReadBlobFloat(Image *image)
%
% A description of each parameter follows.
%
% o image: the image.
%
*/
MagickExport float ReadBlobFloat(Image *image)
{
union
{
unsigned int
unsigned_value;
float
float_value;
} quantum;
quantum.float_value=0.0;
quantum.unsigned_value=ReadBlobLong(image);
return(quantum.float_value);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b L o n g %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobLong() reads a long value as a 32-bit quantity in the byte-order
% specified by the endian member of the image structure.
%
% The format of the ReadBlobLong method is:
%
% unsigned int ReadBlobLong(Image *image)
%
% A description of each parameter follows.
%
% o image: the image.
%
*/
MagickExport unsigned int ReadBlobLong(Image *image)
{
register const unsigned char
*p;
ssize_t
count;
unsigned char
buffer[4];
unsigned int
value;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
*buffer='\0';
p=ReadBlobStream(image,4,buffer,&count);
if (count != 4)
return(0UL);
if (image->endian == LSBEndian)
{
value=(unsigned int) (*p++);
value|=((unsigned int) (*p++)) << 8;
value|=((unsigned int) (*p++)) << 16;
value|=((unsigned int) (*p++)) << 24;
return(value);
}
value=((unsigned int) (*p++)) << 24;
value|=((unsigned int) (*p++)) << 16;
value|=((unsigned int) (*p++)) << 8;
value|=((unsigned int) (*p++));
return(value);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b L o n g L o n g %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobLongLong() reads a long value as a 64-bit quantity in the byte-order
% specified by the endian member of the image structure.
%
% The format of the ReadBlobLong method is:
%
% MagickSizeType ReadBlobLong(Image *image)
%
% A description of each parameter follows.
%
% o image: the image.
%
*/
MagickExport MagickSizeType ReadBlobLongLong(Image *image)
{
register const unsigned char
*p;
ssize_t
count;
unsigned char
buffer[8];
MagickSizeType
value;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
*buffer='\0';
p=ReadBlobStream(image,8,buffer,&count);
if (count != 8)
return(MagickULLConstant(0));
if (image->endian == LSBEndian)
{
value=(MagickSizeType) (*p++);
value|=((MagickSizeType) (*p++)) << 8;
value|=((MagickSizeType) (*p++)) << 16;
value|=((MagickSizeType) (*p++)) << 24;
value|=((MagickSizeType) (*p++)) << 32;
value|=((MagickSizeType) (*p++)) << 40;
value|=((MagickSizeType) (*p++)) << 48;
value|=((MagickSizeType) (*p++)) << 56;
return(value & MagickULLConstant(0xffffffffffffffff));
}
value=((MagickSizeType) (*p++)) << 56;
value|=((MagickSizeType) (*p++)) << 48;
value|=((MagickSizeType) (*p++)) << 40;
value|=((MagickSizeType) (*p++)) << 32;
value|=((MagickSizeType) (*p++)) << 24;
value|=((MagickSizeType) (*p++)) << 16;
value|=((MagickSizeType) (*p++)) << 8;
value|=((MagickSizeType) (*p++));
return(value & MagickULLConstant(0xffffffffffffffff));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b S h o r t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobShort() reads a short value as a 16-bit quantity in the byte-order
% specified by the endian member of the image structure.
%
% The format of the ReadBlobShort method is:
%
% unsigned short ReadBlobShort(Image *image)
%
% A description of each parameter follows.
%
% o image: the image.
%
*/
MagickExport unsigned short ReadBlobShort(Image *image)
{
register const unsigned char
*p;
register unsigned int
value;
ssize_t
count;
unsigned char
buffer[2];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
*buffer='\0';
p=ReadBlobStream(image,2,buffer,&count);
if (count != 2)
return((unsigned short) 0U);
if (image->endian == LSBEndian)
{
value=(unsigned int) (*p++);
value|=((unsigned int) (*p++)) << 8;
return((unsigned short) (value & 0xffff));
}
value=(unsigned int) ((*p++) << 8);
value|=(unsigned int) (*p++);
return((unsigned short) (value & 0xffff));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b L S B L o n g %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobLSBLong() reads a long value as a 32-bit quantity in
% least-significant byte first order.
%
% The format of the ReadBlobLSBLong method is:
%
% unsigned int ReadBlobLSBLong(Image *image)
%
% A description of each parameter follows.
%
% o image: the image.
%
*/
MagickExport unsigned int ReadBlobLSBLong(Image *image)
{
register const unsigned char
*p;
register unsigned int
value;
ssize_t
count;
unsigned char
buffer[4];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
*buffer='\0';
p=ReadBlobStream(image,4,buffer,&count);
if (count != 4)
return(0U);
value=(unsigned int) (*p++);
value|=((unsigned int) (*p++)) << 8;
value|=((unsigned int) (*p++)) << 16;
value|=((unsigned int) (*p++)) << 24;
return(value);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b L S B S h o r t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobLSBShort() reads a short value as a 16-bit quantity in
% least-significant byte first order.
%
% The format of the ReadBlobLSBShort method is:
%
% unsigned short ReadBlobLSBShort(Image *image)
%
% A description of each parameter follows.
%
% o image: the image.
%
*/
MagickExport unsigned short ReadBlobLSBShort(Image *image)
{
register const unsigned char
*p;
register unsigned int
value;
ssize_t
count;
unsigned char
buffer[2];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
*buffer='\0';
p=ReadBlobStream(image,2,buffer,&count);
if (count != 2)
return((unsigned short) 0U);
value=(unsigned int) (*p++);
value|=((unsigned int) ((*p++)) << 8);
return((unsigned short) (value & 0xffff));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b M S B L o n g %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobMSBLong() reads a long value as a 32-bit quantity in
% most-significant byte first order.
%
% The format of the ReadBlobMSBLong method is:
%
% unsigned int ReadBlobMSBLong(Image *image)
%
% A description of each parameter follows.
%
% o image: the image.
%
*/
MagickExport unsigned int ReadBlobMSBLong(Image *image)
{
register const unsigned char
*p;
register unsigned int
value;
ssize_t
count;
unsigned char
buffer[4];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
*buffer='\0';
p=ReadBlobStream(image,4,buffer,&count);
if (count != 4)
return(0UL);
value=((unsigned int) (*p++) << 24);
value|=((unsigned int) (*p++) << 16);
value|=((unsigned int) (*p++) << 8);
value|=(unsigned int) (*p++);
return(value);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b M S B S h o r t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobMSBShort() reads a short value as a 16-bit quantity in
% most-significant byte first order.
%
% The format of the ReadBlobMSBShort method is:
%
% unsigned short ReadBlobMSBShort(Image *image)
%
% A description of each parameter follows.
%
% o image: the image.
%
*/
MagickExport unsigned short ReadBlobMSBShort(Image *image)
{
register const unsigned char
*p;
register unsigned int
value;
ssize_t
count;
unsigned char
buffer[2];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
*buffer='\0';
p=ReadBlobStream(image,2,buffer,&count);
if (count != 2)
return((unsigned short) 0U);
value=(unsigned int) ((*p++) << 8);
value|=(unsigned int) (*p++);
return((unsigned short) (value & 0xffff));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e a d B l o b S t r i n g %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadBlobString() reads characters from a blob or file until a newline
% character is read or an end-of-file condition is encountered.
%
% The format of the ReadBlobString method is:
%
% char *ReadBlobString(Image *image,char *string)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o string: the address of a character buffer.
%
*/
MagickExport char *ReadBlobString(Image *image,char *string)
{
register const unsigned char
*p;
register long
i;
ssize_t
count;
unsigned char
buffer[1];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
for (i=0; i < (MaxTextExtent-1L); i++)
{
p=ReadBlobStream(image,1,buffer,&count);
if (count != 1)
{
if (i == 0)
return((char *) NULL);
break;
}
string[i]=(char) (*p);
if ((string[i] == '\n') || (string[i] == '\r'))
break;
}
string[i]='\0';
return(string);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ R e f e r e n c e B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReferenceBlob() increments the reference count associated with the pixel
% blob returning a pointer to the blob.
%
% The format of the ReferenceBlob method is:
%
% BlobInfo ReferenceBlob(BlobInfo *blob_info)
%
% A description of each parameter follows:
%
% o blob_info: the blob_info.
%
*/
MagickExport BlobInfo *ReferenceBlob(BlobInfo *blob)
{
assert(blob != (BlobInfo *) NULL);
assert(blob->signature == MagickSignature);
if (blob->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
LockSemaphoreInfo(blob->semaphore);
blob->reference_count++;
UnlockSemaphoreInfo(blob->semaphore);
return(blob);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ S e e k B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% SeekBlob() sets the offset in bytes from the beginning of a blob or file
% and returns the resulting offset.
%
% The format of the SeekBlob method is:
%
% MagickOffsetType SeekBlob(Image *image,const MagickOffsetType offset,
% const int whence)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o offset: Specifies an integer representing the offset in bytes.
%
% o whence: Specifies an integer representing how the offset is
% treated relative to the beginning of the blob as follows:
%
% SEEK_SET Set position equal to offset bytes.
% SEEK_CUR Set position to current location plus offset.
% SEEK_END Set position to EOF plus offset.
%
*/
MagickExport MagickOffsetType SeekBlob(Image *image,
const MagickOffsetType offset,const int whence)
{
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(image->blob != (BlobInfo *) NULL);
assert(image->blob->type != UndefinedStream);
switch (image->blob->type)
{
case UndefinedStream:
break;
case FileStream:
{
if (fseek(image->blob->file,offset,whence) < 0)
return(-1);
image->blob->offset=TellBlob(image);
break;
}
case StandardStream:
case PipeStream:
case ZipStream:
{
#if defined(MAGICKCORE_ZLIB_DELEGATE)
if (gzseek(image->blob->file,(off_t) offset,whence) < 0)
return(-1);
#endif
image->blob->offset=TellBlob(image);
break;
}
case BZipStream:
return(-1);
case FifoStream:
return(-1);
case BlobStream:
{
switch (whence)
{
case SEEK_SET:
default:
{
if (offset < 0)
return(-1);
image->blob->offset=offset;
break;
}
case SEEK_CUR:
{
if ((image->blob->offset+offset) < 0)
return(-1);
image->blob->offset+=offset;
break;
}
case SEEK_END:
{
if (((MagickOffsetType) image->blob->length+offset) < 0)
return(-1);
image->blob->offset=image->blob->length+offset;
break;
}
}
if (image->blob->offset <= (MagickOffsetType)
((off_t) image->blob->length))
image->blob->eof=MagickFalse;
else
if (image->blob->mapped != MagickFalse)
return(-1);
else
{
image->blob->extent=(size_t) (image->blob->offset+
image->blob->quantum);
image->blob->data=(unsigned char *) ResizeQuantumMemory(
image->blob->data,image->blob->extent+1,
sizeof(*image->blob->data));
(void) SyncBlob(image);
if (image->blob->data == (unsigned char *) NULL)
{
(void) DetachBlob(image->blob);
return(-1);
}
}
break;
}
}
return(image->blob->offset);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ S e t B l o b E x e m p t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% SetBlobExempt() sets the blob exempt status.
%
% The format of the SetBlobExempt method is:
%
% MagickBooleanType SetBlobExempt(const Image *image,
% const MagickBooleanType exempt)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o exempt: Set to true if this blob is exempt from being closed.
%
*/
MagickExport void SetBlobExempt(Image *image,const MagickBooleanType exempt)
{
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
image->blob->exempt=exempt;
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ S e t B l o b E x t e n t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% SetBlobExtent() ensures enough space is allocated for the blob. If the
% method is successful, subsequent writes to bytes in the specified range are
% guaranteed not to fail.
%
% The format of the SetBlobExtent method is:
%
% MagickBooleanType SetBlobExtent(Image *image,const MagickSizeType extent)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o extent: the blob maximum extent.
%
*/
MagickExport MagickBooleanType SetBlobExtent(Image *image,
const MagickSizeType extent)
{
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(image->blob != (BlobInfo *) NULL);
assert(image->blob->type != UndefinedStream);
switch (image->blob->type)
{
case UndefinedStream:
break;
case FileStream:
{
if (extent != (MagickSizeType) ((off_t) extent))
return(MagickFalse);
#if !defined(MAGICKCORE_POSIX_FALLOCATE)
return(MagickFalse);
#else
{
int
status;
MagickOffsetType
offset;
offset=TellBlob(image);
status=posix_fallocate(fileno(image->blob->file),(off_t) offset,
(off_t) (extent-offset));
if (status != 0)
return(MagickFalse);
}
#endif
break;
}
case StandardStream:
case PipeStream:
case ZipStream:
return(MagickFalse);
case BZipStream:
return(MagickFalse);
case FifoStream:
return(MagickFalse);
case BlobStream:
{
if (image->blob->mapped != MagickFalse)
{
if (image->blob->file == (FILE *) NULL)
return(MagickFalse);
(void) UnmapBlob(image->blob->data,image->blob->length);
#if !defined(MAGICKCORE_POSIX_FALLOCATE)
return(MagickFalse);
#else
{
int
status;
MagickOffsetType
offset;
offset=TellBlob(image);
status=posix_fallocate(fileno(image->blob->file),(off_t) offset,
(off_t) (extent-offset));
if (status != 0)
return(MagickFalse);
}
image->blob->data=(unsigned char*) MapBlob(fileno(image->blob->file),
WriteMode,0,(size_t) extent);
image->blob->extent=(size_t) extent;
image->blob->length=(size_t) extent;
(void) SyncBlob(image);
break;
#endif
}
if (extent != (MagickSizeType) ((size_t) extent))
return(MagickFalse);
image->blob->extent=(size_t) extent;
image->blob->data=(unsigned char *) ResizeQuantumMemory(image->blob->data,
image->blob->extent+1,sizeof(*image->blob->data));
(void) SyncBlob(image);
if (image->blob->data == (unsigned char *) NULL)
{
(void) DetachBlob(image->blob);
return(MagickFalse);
}
break;
}
}
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ S y n c B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% SyncBlob() flushes the datastream if it is a file or synchronizes the data
% attributes if it is an blob.
%
% The format of the SyncBlob method is:
%
% int SyncBlob(Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
static int SyncBlob(Image *image)
{
int
status;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(image->blob != (BlobInfo *) NULL);
assert(image->blob->type != UndefinedStream);
status=0;
switch (image->blob->type)
{
case UndefinedStream:
break;
case FileStream:
case StandardStream:
case PipeStream:
{
status=fflush(image->blob->file);
break;
}
case ZipStream:
{
#if defined(MAGICKCORE_ZLIB_DELEGATE)
status=gzflush(image->blob->file,Z_SYNC_FLUSH);
#endif
break;
}
case BZipStream:
{
#if defined(MAGICKCORE_BZLIB_DELEGATE)
status=BZ2_bzflush((BZFILE *) image->blob->file);
#endif
break;
}
case FifoStream:
break;
case BlobStream:
{
#if defined(MAGICKCORE_HAVE_MMAP_FILEIO)
if (image->blob->mapped != MagickFalse)
status=msync(image->blob->data,image->blob->length,MS_SYNC);
#endif
break;
}
}
return(status);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ T e l l B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% TellBlob() obtains the current value of the blob or file position.
%
% The format of the TellBlob method is:
%
% MagickOffsetType TellBlob(const Image *image)
%
% A description of each parameter follows:
%
% o image: the image.
%
*/
MagickExport MagickOffsetType TellBlob(const Image *image)
{
MagickOffsetType
offset;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(image->blob != (BlobInfo *) NULL);
assert(image->blob->type != UndefinedStream);
offset=(-1);
switch (image->blob->type)
{
case UndefinedStream:
break;
case FileStream:
{
offset=ftell(image->blob->file);
break;
}
case StandardStream:
case PipeStream:
break;
case ZipStream:
{
#if defined(MAGICKCORE_ZLIB_DELEGATE)
offset=(MagickOffsetType) gztell(image->blob->file);
#endif
break;
}
case BZipStream:
break;
case FifoStream:
break;
case BlobStream:
{
offset=image->blob->offset;
break;
}
}
return(offset);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ U n m a p B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnmapBlob() deallocates the binary large object previously allocated with
% the MapBlob method.
%
% The format of the UnmapBlob method is:
%
% MagickBooleanType UnmapBlob(void *map,const size_t length)
%
% A description of each parameter follows:
%
% o map: the address of the binary large object.
%
% o length: the length of the binary large object.
%
*/
MagickExport MagickBooleanType UnmapBlob(void *map,const size_t length)
{
#if defined(MAGICKCORE_HAVE_MMAP_FILEIO)
int
status;
status=munmap(map,length);
return(status == -1 ? MagickFalse : MagickTrue);
#else
(void) map;
(void) length;
return(MagickFalse);
#endif
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ W r i t e B l o b %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteBlob() writes data to a blob or image file. It returns the number of
% bytes written.
%
% The format of the WriteBlob method is:
%
% ssize_t WriteBlob(Image *image,const size_t length,
% const unsigned char *data)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o length: Specifies an integer representing the number of bytes to
% write to the file.
%
% o data: The address of the data to write to the blob or file.
%
*/
MagickExport ssize_t WriteBlob(Image *image,const size_t length,
const unsigned char *data)
{
int
c;
register const unsigned char
*p;
ssize_t
count;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
assert(data != (const unsigned char *) NULL);
assert(image->blob != (BlobInfo *) NULL);
assert(image->blob->type != UndefinedStream);
if (length == 0)
return(0);
count=0;
p=data;
switch (image->blob->type)
{
case UndefinedStream:
break;
case FileStream:
case StandardStream:
case PipeStream:
{
switch (length)
{
default:
{
count=(ssize_t) fwrite((const char *) data,1,length,
image->blob->file);
break;
}
case 2:
{
c=putc((int) *p++,image->blob->file);
if (c == EOF)
break;
count++;
}
case 1:
{
c=putc((int) *p++,image->blob->file);
if (c == EOF)
break;
count++;
}
case 0:
break;
}
break;
}
case ZipStream:
{
#if defined(MAGICKCORE_ZLIB_DELEGATE)
switch (length)
{
default:
{
count=(ssize_t) gzwrite(image->blob->file,(void *) data,
(unsigned int) length);
break;
}
case 2:
{
c=gzputc(image->blob->file,(int) *p++);
if (c == EOF)
break;
count++;
}
case 1:
{
c=gzputc(image->blob->file,(int) *p++);
if (c == EOF)
break;
count++;
}
case 0:
break;
}
#endif
break;
}
case BZipStream:
{
#if defined(MAGICKCORE_BZLIB_DELEGATE)
count=(ssize_t) BZ2_bzwrite((BZFILE *) image->blob->file,(void *) data,
(int) length);
#endif
break;
}
case FifoStream:
{
count=(ssize_t) image->blob->stream(image,data,length);
break;
}
case BlobStream:
{
register unsigned char
*q;
if ((image->blob->offset+(MagickOffsetType) length) >=
(MagickOffsetType) image->blob->extent)
{
if (image->blob->mapped != MagickFalse)
return(0);
image->blob->quantum<<=1;
image->blob->extent+=length+image->blob->quantum;
image->blob->data=(unsigned char *) ResizeQuantumMemory(
image->blob->data,image->blob->extent+1,sizeof(*image->blob->data));
(void) SyncBlob(image);
if (image->blob->data == (unsigned char *) NULL)
{
(void) DetachBlob(image->blob);
return(0);
}
}
q=image->blob->data+image->blob->offset;
(void) CopyMagickMemory(q,p,length);
image->blob->offset+=length;
if (image->blob->offset >= (MagickOffsetType) image->blob->length)
image->blob->length=(size_t) image->blob->offset;
count=(ssize_t) length;
}
}
return(count);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ W r i t e B l o b B y t e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteBlobByte() write an integer to a blob. It returns the number of bytes
% written (either 0 or 1);
%
% The format of the WriteBlobByte method is:
%
% ssize_t WriteBlobByte(Image *image,const unsigned char value)
%
% A description of each parameter follows.
%
% o image: the image.
%
% o value: Specifies the value to write.
%
*/
MagickExport ssize_t WriteBlobByte(Image *image,const unsigned char value)
{
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
return(WriteBlobStream(image,1,&value));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ W r i t e B l o b F l o a t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteBlobFloat() writes a float value as a 32-bit quantity in the byte-order
% specified by the endian member of the image structure.
%
% The format of the WriteBlobFloat method is:
%
% ssize_t WriteBlobFloat(Image *image,const float value)
%
% A description of each parameter follows.
%
% o image: the image.
%
% o value: Specifies the value to write.
%
*/
MagickExport ssize_t WriteBlobFloat(Image *image,const float value)
{
union
{
unsigned int
unsigned_value;
float
float_value;
} quantum;
quantum.unsigned_value=0U;
quantum.float_value=value;
return(WriteBlobLong(image,quantum.unsigned_value));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ W r i t e B l o b L o n g %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteBlobLong() writes a long value as a 32-bit quantity in the byte-order
% specified by the endian member of the image structure.
%
% The format of the WriteBlobLong method is:
%
% ssize_t WriteBlobLong(Image *image,const unsigned int value)
%
% A description of each parameter follows.
%
% o image: the image.
%
% o value: Specifies the value to write.
%
*/
MagickExport ssize_t WriteBlobLong(Image *image,const unsigned int value)
{
unsigned char
buffer[4];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->endian == LSBEndian)
{
buffer[0]=(unsigned char) value;
buffer[1]=(unsigned char) (value >> 8);
buffer[2]=(unsigned char) (value >> 16);
buffer[3]=(unsigned char) (value >> 24);
return(WriteBlobStream(image,4,buffer));
}
buffer[0]=(unsigned char) (value >> 24);
buffer[1]=(unsigned char) (value >> 16);
buffer[2]=(unsigned char) (value >> 8);
buffer[3]=(unsigned char) value;
return(WriteBlobStream(image,4,buffer));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ W r i t e B l o b S h o r t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteBlobShort() writes a short value as a 16-bit quantity in the
% byte-order specified by the endian member of the image structure.
%
% The format of the WriteBlobShort method is:
%
% ssize_t WriteBlobShort(Image *image,const unsigned short value)
%
% A description of each parameter follows.
%
% o image: the image.
%
% o value: Specifies the value to write.
%
*/
MagickExport ssize_t WriteBlobShort(Image *image,const unsigned short value)
{
unsigned char
buffer[2];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->endian == LSBEndian)
{
buffer[0]=(unsigned char) value;
buffer[1]=(unsigned char) (value >> 8);
return(WriteBlobStream(image,2,buffer));
}
buffer[0]=(unsigned char) (value >> 8);
buffer[1]=(unsigned char) value;
return(WriteBlobStream(image,2,buffer));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ W r i t e B l o b L S B L o n g %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteBlobLSBLong() writes a long value as a 32-bit quantity in
% least-significant byte first order.
%
% The format of the WriteBlobLSBLong method is:
%
% ssize_t WriteBlobLSBLong(Image *image,const unsigned int value)
%
% A description of each parameter follows.
%
% o image: the image.
%
% o value: Specifies the value to write.
%
*/
MagickExport ssize_t WriteBlobLSBLong(Image *image,const unsigned int value)
{
unsigned char
buffer[4];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
buffer[0]=(unsigned char) value;
buffer[1]=(unsigned char) (value >> 8);
buffer[2]=(unsigned char) (value >> 16);
buffer[3]=(unsigned char) (value >> 24);
return(WriteBlobStream(image,4,buffer));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ W r i t e B l o b L S B S h o r t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteBlobLSBShort() writes a long value as a 16-bit quantity in
% least-significant byte first order.
%
% The format of the WriteBlobLSBShort method is:
%
% ssize_t WriteBlobLSBShort(Image *image,const unsigned short value)
%
% A description of each parameter follows.
%
% o image: the image.
%
% o value: Specifies the value to write.
%
*/
MagickExport ssize_t WriteBlobLSBShort(Image *image,const unsigned short value)
{
unsigned char
buffer[2];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
buffer[0]=(unsigned char) value;
buffer[1]=(unsigned char) (value >> 8);
return(WriteBlobStream(image,2,buffer));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ W r i t e B l o b M S B L o n g %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteBlobMSBLong() writes a long value as a 32-bit quantity in
% most-significant byte first order.
%
% The format of the WriteBlobMSBLong method is:
%
% ssize_t WriteBlobMSBLong(Image *image,const unsigned int value)
%
% A description of each parameter follows.
%
% o value: Specifies the value to write.
%
% o image: the image.
%
*/
MagickExport ssize_t WriteBlobMSBLong(Image *image,const unsigned int value)
{
unsigned char
buffer[4];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
buffer[0]=(unsigned char) (value >> 24);
buffer[1]=(unsigned char) (value >> 16);
buffer[2]=(unsigned char) (value >> 8);
buffer[3]=(unsigned char) value;
return(WriteBlobStream(image,4,buffer));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ W r i t e B l o b M S B S h o r t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteBlobMSBShort() writes a long value as a 16-bit quantity in
% most-significant byte first order.
%
% The format of the WriteBlobMSBShort method is:
%
% ssize_t WriteBlobMSBShort(Image *image,const unsigned short value)
%
% A description of each parameter follows.
%
% o value: Specifies the value to write.
%
% o file: Specifies the file to write the data to.
%
*/
MagickExport ssize_t WriteBlobMSBShort(Image *image,const unsigned short value)
{
unsigned char
buffer[2];
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
buffer[0]=(unsigned char) (value >> 8);
buffer[1]=(unsigned char) value;
return(WriteBlobStream(image,2,buffer));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ W r i t e B l o b S t r i n g %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteBlobString() write a string to a blob. It returns the number of
% characters written.
%
% The format of the WriteBlobString method is:
%
% ssize_t WriteBlobString(Image *image,const char *string)
%
% A description of each parameter follows.
%
% o image: the image.
%
% o string: Specifies the string to write.
%
*/
MagickExport ssize_t WriteBlobString(Image *image,const char *string)
{
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
assert(string != (const char *) NULL);
return(WriteBlobStream(image,strlen(string),(const unsigned char *) string));
}