mirror of
https://github.com/ImageMagick/ImageMagick.git
synced 2026-05-25 11:24:54 +02:00
Dirk Lemstra
824 lines
27 KiB
C
824 lines
27 KiB
C
/*
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% %
|
|
% %
|
|
% %
|
|
% M M AAA GGGG IIIII CCCC %
|
|
% MM MM A A G I C %
|
|
% M M M AAAAA G GGG I C %
|
|
% M M A A G G I C %
|
|
% M M A A GGGG IIIII CCCC %
|
|
% %
|
|
% %
|
|
% MagickCore Image Magic Methods %
|
|
% %
|
|
% Software Design %
|
|
% Bob Friesenhahn %
|
|
% July 2000 %
|
|
% %
|
|
% %
|
|
% Copyright @ 1999 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 %
|
|
% %
|
|
% https://imagemagick.org/license/ %
|
|
% %
|
|
% 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 "MagickCore/studio.h"
|
|
#include "MagickCore/blob.h"
|
|
#include "MagickCore/client.h"
|
|
#include "MagickCore/configure.h"
|
|
#include "MagickCore/configure-private.h"
|
|
#include "MagickCore/exception.h"
|
|
#include "MagickCore/exception-private.h"
|
|
#include "MagickCore/linked-list.h"
|
|
#include "MagickCore/linked-list-private.h"
|
|
#include "MagickCore/magic.h"
|
|
#include "MagickCore/magic-private.h"
|
|
#include "MagickCore/memory_.h"
|
|
#include "MagickCore/memory-private.h"
|
|
#include "MagickCore/semaphore.h"
|
|
#include "MagickCore/string_.h"
|
|
#include "MagickCore/string-private.h"
|
|
#include "MagickCore/token.h"
|
|
#include "MagickCore/utility.h"
|
|
#include "MagickCore/utility-private.h"
|
|
#include "coders/coders.h"
|
|
|
|
/*
|
|
Define declarations.
|
|
*/
|
|
#define AddMagickCoder(coder) Magick ## coder ## Headers
|
|
|
|
/*
|
|
Typedef declarations.
|
|
*/
|
|
typedef struct _MagicMapInfo
|
|
{
|
|
const char
|
|
name[10];
|
|
|
|
const MagickOffsetType
|
|
offset;
|
|
|
|
const unsigned char
|
|
*const magic;
|
|
|
|
const size_t
|
|
length;
|
|
|
|
const MagickBooleanType
|
|
skip_spaces;
|
|
} MagicMapInfo;
|
|
|
|
struct _MagicInfo
|
|
{
|
|
char
|
|
*name;
|
|
|
|
unsigned char
|
|
*magic;
|
|
|
|
size_t
|
|
length;
|
|
|
|
MagickOffsetType
|
|
offset;
|
|
|
|
MagickBooleanType
|
|
skip_spaces;
|
|
|
|
size_t
|
|
signature;
|
|
};
|
|
|
|
/*
|
|
Static declarations.
|
|
*/
|
|
static const MagicMapInfo
|
|
MagicMap[] =
|
|
{
|
|
#include "coders/coders-list.h"
|
|
MagickCoderHeader("CGM", 0, "BEGMF")
|
|
MagickCoderHeader("FIG", 0, "#FIG")
|
|
MagickCoderHeader("HPGL", 0, "IN;")
|
|
MagickCoderHeader("ILBM", 8, "ILBM")
|
|
};
|
|
|
|
static LinkedListInfo
|
|
*magic_cache = (LinkedListInfo *) NULL,
|
|
*magic_list = (LinkedListInfo *) NULL;
|
|
|
|
static SemaphoreInfo
|
|
*magic_cache_semaphore = (SemaphoreInfo *) NULL,
|
|
*magic_list_semaphore = (SemaphoreInfo *) NULL;
|
|
|
|
/*
|
|
Forward declarations.
|
|
*/
|
|
static MagickBooleanType
|
|
IsMagicListInstantiated(ExceptionInfo *);
|
|
|
|
/*
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% %
|
|
% %
|
|
% %
|
|
% A c q u i r e M a g i c L i s t %
|
|
% %
|
|
% %
|
|
% %
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% AcquireMagicList() caches one or more magic configurations which provides a
|
|
% mapping between magic attributes and a magic name.
|
|
%
|
|
% The format of the AcquireMagicList method is:
|
|
%
|
|
% LinkedListInfo *AcquireMagicList(ExceptionInfo *exception)
|
|
%
|
|
% A description of each parameter follows:
|
|
%
|
|
% o filename: the font file name.
|
|
%
|
|
% o exception: return any errors or warnings in this structure.
|
|
%
|
|
*/
|
|
|
|
static int CompareMagickInfoExtent(const void *a,const void *b)
|
|
{
|
|
MagicInfo
|
|
*ma,
|
|
*mb;
|
|
|
|
MagickOffsetType
|
|
delta;
|
|
|
|
ma=(MagicInfo *) a;
|
|
mb=(MagicInfo *) b;
|
|
delta=(MagickOffsetType) mb->length-(MagickOffsetType) ma->length;
|
|
if (ma->offset != mb->offset)
|
|
{
|
|
/*
|
|
Offset is near the start? Let's search a bit further in the stream.
|
|
*/
|
|
delta=ma->offset-mb->offset;
|
|
if ((ma->offset > mb->offset ? ma->offset : mb->offset) <= 10)
|
|
delta=mb->offset-ma->offset;
|
|
}
|
|
return(delta > INT_MAX ? 0 : (int) delta);
|
|
}
|
|
|
|
static LinkedListInfo *AcquireMagicList(ExceptionInfo *exception)
|
|
{
|
|
LinkedListInfo
|
|
*list;
|
|
|
|
MagickStatusType
|
|
status;
|
|
|
|
ssize_t
|
|
i;
|
|
|
|
list=NewLinkedList(0);
|
|
status=MagickTrue;
|
|
/*
|
|
Load built-in magic map.
|
|
*/
|
|
for (i=0; i < (ssize_t) (sizeof(MagicMap)/sizeof(*MagicMap)); i++)
|
|
{
|
|
MagicInfo
|
|
*magic_info;
|
|
|
|
const MagicMapInfo
|
|
*p;
|
|
|
|
p=MagicMap+i;
|
|
magic_info=(MagicInfo *) AcquireMagickMemory(sizeof(*magic_info));
|
|
if (magic_info == (MagicInfo *) NULL)
|
|
{
|
|
(void) ThrowMagickException(exception,GetMagickModule(),
|
|
ResourceLimitError,"MemoryAllocationFailed","`%s'",p->name);
|
|
continue;
|
|
}
|
|
(void) memset(magic_info,0,sizeof(*magic_info));
|
|
magic_info->name=(char *) p->name;
|
|
magic_info->offset=p->offset;
|
|
magic_info->magic=(unsigned char *) p->magic;
|
|
magic_info->length=p->length;
|
|
magic_info->skip_spaces=p->skip_spaces;
|
|
magic_info->signature=MagickCoreSignature;
|
|
status&=(MagickStatusType) InsertValueInSortedLinkedList(list,
|
|
CompareMagickInfoExtent,NULL,magic_info);
|
|
if (status == MagickFalse)
|
|
(void) ThrowMagickException(exception,GetMagickModule(),
|
|
ResourceLimitError,"MemoryAllocationFailed","`%s'",magic_info->name);
|
|
}
|
|
return(list);
|
|
}
|
|
|
|
/*
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% %
|
|
% %
|
|
% %
|
|
% G e t M a g i c I n f o %
|
|
% %
|
|
% %
|
|
% %
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% GetMagicInfo() searches the magic list for the specified name and if found
|
|
% returns attributes for that magic.
|
|
%
|
|
% The format of the GetMagicInfo method is:
|
|
%
|
|
% const MagicInfo *GetMagicInfo(const unsigned char *magic,
|
|
% const size_t length,ExceptionInfo *exception)
|
|
%
|
|
% A description of each parameter follows:
|
|
%
|
|
% o magic: A binary string generally representing the first few characters
|
|
% of the image file or blob.
|
|
%
|
|
% o length: the length of the binary signature.
|
|
%
|
|
% o exception: return any errors or warnings in this structure.
|
|
%
|
|
*/
|
|
|
|
static inline MagickBooleanType CompareMagic(const unsigned char *magic,
|
|
const size_t length,const MagicInfo *magic_info)
|
|
{
|
|
const unsigned char
|
|
*q;
|
|
|
|
MagickOffsetType
|
|
remaining;
|
|
|
|
assert(magic_info->offset >= 0);
|
|
q=magic+magic_info->offset;
|
|
remaining=(MagickOffsetType) length-magic_info->offset;
|
|
if (magic_info->skip_spaces != MagickFalse)
|
|
while ((remaining > 0) && (isspace(*q) != 0))
|
|
{
|
|
q++;
|
|
remaining--;
|
|
}
|
|
if ((remaining >= (MagickOffsetType) magic_info->length) &&
|
|
(memcmp(q,magic_info->magic,magic_info->length) == 0))
|
|
return(MagickTrue);
|
|
return(MagickFalse);
|
|
}
|
|
|
|
static MagickBooleanType IsMagicCacheInstantiated(void)
|
|
{
|
|
if (magic_cache == (LinkedListInfo *) NULL)
|
|
{
|
|
if (magic_cache_semaphore == (SemaphoreInfo *) NULL)
|
|
ActivateSemaphoreInfo(&magic_cache_semaphore);
|
|
LockSemaphoreInfo(magic_cache_semaphore);
|
|
if (magic_cache == (LinkedListInfo *) NULL)
|
|
magic_cache=NewLinkedList(0);
|
|
UnlockSemaphoreInfo(magic_cache_semaphore);
|
|
}
|
|
return(magic_cache != (LinkedListInfo *) NULL ? MagickTrue : MagickFalse);
|
|
}
|
|
|
|
MagickExport const MagicInfo *GetMagicInfo(const unsigned char *magic,
|
|
const size_t length,ExceptionInfo *exception)
|
|
{
|
|
const MagicInfo *
|
|
magic_info;
|
|
|
|
ElementInfo
|
|
*p;
|
|
|
|
assert(exception != (ExceptionInfo *) NULL);
|
|
if (IsMagicListInstantiated(exception) == MagickFalse)
|
|
return((const MagicInfo *) NULL);
|
|
if (IsMagicCacheInstantiated() == MagickFalse)
|
|
return((const MagicInfo *) NULL);
|
|
/*
|
|
Search for cached entries.
|
|
*/
|
|
magic_info=(const MagicInfo *) NULL;
|
|
if (magic != (const unsigned char *) NULL)
|
|
{
|
|
LockSemaphoreInfo(magic_cache_semaphore);
|
|
p=GetHeadElementInLinkedList(magic_cache);
|
|
while (p != (ElementInfo *) NULL)
|
|
{
|
|
magic_info=(const MagicInfo *) p->value;
|
|
if (CompareMagic(magic,length,magic_info) != MagickFalse)
|
|
break;
|
|
p=p->next;
|
|
}
|
|
UnlockSemaphoreInfo(magic_cache_semaphore);
|
|
if (p != (ElementInfo *) NULL)
|
|
return(magic_info);
|
|
}
|
|
/*
|
|
Search for magic tag.
|
|
*/
|
|
LockSemaphoreInfo(magic_list_semaphore);
|
|
p=GetHeadElementInLinkedList(magic_list);
|
|
if (magic == (const unsigned char *) NULL)
|
|
{
|
|
UnlockSemaphoreInfo(magic_list_semaphore);
|
|
if (p != (ElementInfo *) NULL)
|
|
magic_info=(const MagicInfo *) p->value;
|
|
return(magic_info);
|
|
}
|
|
while (p != (ElementInfo *) NULL)
|
|
{
|
|
magic_info=(const MagicInfo *) p->value;
|
|
if (CompareMagic(magic,length,magic_info) != MagickFalse)
|
|
break;
|
|
p=p->next;
|
|
}
|
|
UnlockSemaphoreInfo(magic_list_semaphore);
|
|
if (p == (ElementInfo *) NULL)
|
|
magic_info=(const MagicInfo *) NULL;
|
|
else
|
|
{
|
|
LockSemaphoreInfo(magic_cache_semaphore);
|
|
(void) InsertValueInSortedLinkedList(magic_cache,CompareMagickInfoExtent,
|
|
NULL,magic_info);
|
|
UnlockSemaphoreInfo(magic_cache_semaphore);
|
|
}
|
|
return(magic_info);
|
|
}
|
|
|
|
/*
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% %
|
|
% %
|
|
% %
|
|
% G e t M a g i c P a t t e r n E x t e n t %
|
|
% %
|
|
% %
|
|
% %
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% GetMagicPatternExtent() returns the extent of the buffer that is
|
|
% required to check all the MagickInfos. It returns zero if the list is empty.
|
|
%
|
|
% The format of the GetMagicPatternExtent method is:
|
|
%
|
|
% size_t GetMagicPatternExtent(ExceptionInfo *exception)
|
|
%
|
|
% A description of each parameter follows:
|
|
%
|
|
% o exception: return any errors or warnings in this structure.
|
|
%
|
|
*/
|
|
MagickExport size_t GetMagicPatternExtent(ExceptionInfo *exception)
|
|
{
|
|
ElementInfo
|
|
*p;
|
|
|
|
MagickOffsetType
|
|
max_offset,
|
|
offset;
|
|
|
|
static size_t
|
|
extent = 0;
|
|
|
|
assert(exception != (ExceptionInfo *) NULL);
|
|
if ((extent != 0) || (IsMagicListInstantiated(exception) == MagickFalse))
|
|
return(extent);
|
|
LockSemaphoreInfo(magic_list_semaphore);
|
|
p=GetHeadElementInLinkedList(magic_list);
|
|
for (max_offset=0; p != (ElementInfo *) NULL; )
|
|
{
|
|
const MagicInfo
|
|
*magic_info;
|
|
|
|
magic_info=(const MagicInfo *) p->value;
|
|
offset=magic_info->offset+(MagickOffsetType) magic_info->length;
|
|
if (offset > max_offset)
|
|
max_offset=offset;
|
|
p=p->next;
|
|
}
|
|
UnlockSemaphoreInfo(magic_list_semaphore);
|
|
if (max_offset > (MagickOffsetType) (MAGICK_SSIZE_MAX/2))
|
|
return(0);
|
|
extent=(size_t) max_offset;
|
|
return(extent);
|
|
}
|
|
|
|
/*
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% %
|
|
% %
|
|
% %
|
|
% G e t M a g i c I n f o L i s t %
|
|
% %
|
|
% %
|
|
% %
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% GetMagicInfoList() returns any image aliases that match the specified
|
|
% pattern.
|
|
%
|
|
% The magic of the GetMagicInfoList function is:
|
|
%
|
|
% const MagicInfo **GetMagicInfoList(const char *pattern,
|
|
% size_t *number_aliases,ExceptionInfo *exception)
|
|
%
|
|
% A description of each parameter follows:
|
|
%
|
|
% o pattern: Specifies a pointer to a text string containing a pattern.
|
|
%
|
|
% o number_aliases: This integer returns the number of aliases in the list.
|
|
%
|
|
% o exception: return any errors or warnings in this structure.
|
|
%
|
|
*/
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
static int MagicInfoCompare(const void *x,const void *y)
|
|
{
|
|
const MagicInfo
|
|
**p,
|
|
**q;
|
|
|
|
p=(const MagicInfo **) x,
|
|
q=(const MagicInfo **) y;
|
|
return(LocaleCompare((*p)->name,(*q)->name));
|
|
}
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
}
|
|
#endif
|
|
|
|
MagickExport const MagicInfo **GetMagicInfoList(const char *pattern,
|
|
size_t *number_aliases,ExceptionInfo *exception)
|
|
{
|
|
const MagicInfo
|
|
**aliases;
|
|
|
|
ElementInfo
|
|
*p;
|
|
|
|
ssize_t
|
|
i;
|
|
|
|
magick_unreferenced(exception);
|
|
assert(pattern != (char *) NULL);
|
|
assert(number_aliases != (size_t *) NULL);
|
|
if (IsEventLogging() != MagickFalse)
|
|
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",pattern);
|
|
*number_aliases=0;
|
|
if (IsMagicListInstantiated(exception) == MagickFalse)
|
|
return((const MagicInfo **) NULL);
|
|
aliases=(const MagicInfo **) AcquireQuantumMemory((size_t)
|
|
GetNumberOfElementsInLinkedList(magic_list)+1UL,sizeof(*aliases));
|
|
if (aliases == (const MagicInfo **) NULL)
|
|
return((const MagicInfo **) NULL);
|
|
LockSemaphoreInfo(magic_list_semaphore);
|
|
p=GetHeadElementInLinkedList(magic_list);
|
|
for (i=0; p != (ElementInfo *) NULL; )
|
|
{
|
|
const MagicInfo
|
|
*magic_info;
|
|
|
|
magic_info=(const MagicInfo *) p->value;
|
|
if (GlobExpression(magic_info->name,pattern,MagickFalse) != MagickFalse)
|
|
aliases[i++]=magic_info;
|
|
p=p->next;
|
|
}
|
|
UnlockSemaphoreInfo(magic_list_semaphore);
|
|
if (i == 0)
|
|
aliases=(const MagicInfo **) RelinquishMagickMemory((void*) aliases);
|
|
else
|
|
{
|
|
qsort((void *) aliases,(size_t) i,sizeof(*aliases),MagicInfoCompare);
|
|
aliases[i]=(MagicInfo *) NULL;
|
|
}
|
|
*number_aliases=(size_t) i;
|
|
return(aliases);
|
|
}
|
|
|
|
/*
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% %
|
|
% %
|
|
% %
|
|
% G e t M a g i c L i s t %
|
|
% %
|
|
% %
|
|
% %
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% GetMagicList() returns any image format aliases that match the specified
|
|
% pattern.
|
|
%
|
|
% The format of the GetMagicList function is:
|
|
%
|
|
% char **GetMagicList(const char *pattern,size_t *number_aliases,
|
|
% ExceptionInfo *exception)
|
|
%
|
|
% A description of each parameter follows:
|
|
%
|
|
% o pattern: Specifies a pointer to a text string containing a pattern.
|
|
%
|
|
% o number_aliases: This integer returns the number of image format aliases
|
|
% in the list.
|
|
%
|
|
% o exception: return any errors or warnings in this structure.
|
|
%
|
|
*/
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
extern "C" {
|
|
#endif
|
|
|
|
static int MagicCompare(const void *x,const void *y)
|
|
{
|
|
const char
|
|
*p,
|
|
*q;
|
|
|
|
p=(const char *) x;
|
|
q=(const char *) y;
|
|
return(LocaleCompare(p,q));
|
|
}
|
|
|
|
#if defined(__cplusplus) || defined(c_plusplus)
|
|
}
|
|
#endif
|
|
|
|
MagickExport char **GetMagicList(const char *pattern,size_t *number_aliases,
|
|
ExceptionInfo *exception)
|
|
{
|
|
char
|
|
**aliases;
|
|
|
|
ElementInfo
|
|
*p;
|
|
|
|
ssize_t
|
|
i;
|
|
|
|
magick_unreferenced(exception);
|
|
assert(pattern != (char *) NULL);
|
|
assert(number_aliases != (size_t *) NULL);
|
|
if (IsEventLogging() != MagickFalse)
|
|
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",pattern);
|
|
*number_aliases=0;
|
|
if (IsMagicListInstantiated(exception) == MagickFalse)
|
|
return((char **) NULL);
|
|
aliases=(char **) AcquireQuantumMemory((size_t)
|
|
GetNumberOfElementsInLinkedList(magic_list)+1UL,sizeof(*aliases));
|
|
if (aliases == (char **) NULL)
|
|
return((char **) NULL);
|
|
LockSemaphoreInfo(magic_list_semaphore);
|
|
p=GetHeadElementInLinkedList(magic_list);
|
|
for (i=0; p != (ElementInfo *) NULL; )
|
|
{
|
|
const MagicInfo
|
|
*magic_info;
|
|
|
|
magic_info=(const MagicInfo *) p->value;
|
|
if (GlobExpression(magic_info->name,pattern,MagickFalse) != MagickFalse)
|
|
aliases[i++]=ConstantString(magic_info->name);
|
|
p=p->next;
|
|
}
|
|
UnlockSemaphoreInfo(magic_list_semaphore);
|
|
if (i == 0)
|
|
aliases=(char **) RelinquishMagickMemory(aliases);
|
|
else
|
|
{
|
|
qsort((void *) aliases,(size_t) i,sizeof(*aliases),MagicCompare);
|
|
aliases[i]=(char *) NULL;
|
|
}
|
|
*number_aliases=(size_t) i;
|
|
return(aliases);
|
|
}
|
|
|
|
/*
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% %
|
|
% %
|
|
% %
|
|
% G e t M a g i c N a m e %
|
|
% %
|
|
% %
|
|
% %
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% GetMagicName() returns the name associated with the magic.
|
|
%
|
|
% The format of the GetMagicName method is:
|
|
%
|
|
% const char *GetMagicName(const MagicInfo *magic_info)
|
|
%
|
|
% A description of each parameter follows:
|
|
%
|
|
% o magic_info: The magic info.
|
|
%
|
|
*/
|
|
MagickExport const char *GetMagicName(const MagicInfo *magic_info)
|
|
{
|
|
assert(magic_info != (MagicInfo *) NULL);
|
|
assert(magic_info->signature == MagickCoreSignature);
|
|
if (IsEventLogging() != MagickFalse)
|
|
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
|
|
return(magic_info->name);
|
|
}
|
|
|
|
/*
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% %
|
|
% %
|
|
% %
|
|
+ I s M a g i c L i s t I n s t a n t i a t e d %
|
|
% %
|
|
% %
|
|
% %
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% IsMagicListInstantiated() determines if the magic list is instantiated.
|
|
% If not, it instantiates the list and returns it.
|
|
%
|
|
% The format of the IsMagicListInstantiated method is:
|
|
%
|
|
% MagickBooleanType IsMagicListInstantiated(ExceptionInfo *exception)
|
|
%
|
|
% A description of each parameter follows.
|
|
%
|
|
% o exception: return any errors or warnings in this structure.
|
|
%
|
|
*/
|
|
static MagickBooleanType IsMagicListInstantiated(ExceptionInfo *exception)
|
|
{
|
|
if (magic_list == (LinkedListInfo *) NULL)
|
|
{
|
|
if (magic_list_semaphore == (SemaphoreInfo *) NULL)
|
|
ActivateSemaphoreInfo(&magic_list_semaphore);
|
|
LockSemaphoreInfo(magic_list_semaphore);
|
|
if (magic_list == (LinkedListInfo *) NULL)
|
|
magic_list=AcquireMagicList(exception);
|
|
UnlockSemaphoreInfo(magic_list_semaphore);
|
|
}
|
|
return(magic_list != (LinkedListInfo *) NULL ? MagickTrue : MagickFalse);
|
|
}
|
|
|
|
/*
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% %
|
|
% %
|
|
% %
|
|
% L i s t M a g i c I n f o %
|
|
% %
|
|
% %
|
|
% %
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% ListMagicInfo() lists the magic info to a file.
|
|
%
|
|
% The format of the ListMagicInfo method is:
|
|
%
|
|
% MagickBooleanType ListMagicInfo(FILE *file,ExceptionInfo *exception)
|
|
%
|
|
% A description of each parameter follows.
|
|
%
|
|
% o file: An pointer to a FILE.
|
|
%
|
|
% o exception: return any errors or warnings in this structure.
|
|
%
|
|
*/
|
|
MagickExport MagickBooleanType ListMagicInfo(FILE *file,
|
|
ExceptionInfo *exception)
|
|
{
|
|
const MagicInfo
|
|
**magic_info;
|
|
|
|
ssize_t
|
|
i;
|
|
|
|
size_t
|
|
number_aliases;
|
|
|
|
ssize_t
|
|
j;
|
|
|
|
if (file == (const FILE *) NULL)
|
|
file=stdout;
|
|
magic_info=GetMagicInfoList("*",&number_aliases,exception);
|
|
if (magic_info == (const MagicInfo **) NULL)
|
|
return(MagickFalse);
|
|
(void) FormatLocaleFile(file,"Name Offset Target\n");
|
|
(void) FormatLocaleFile(file,
|
|
"-------------------------------------------------"
|
|
"------------------------------\n");
|
|
for (i=0; i < (ssize_t) number_aliases; i++)
|
|
{
|
|
(void) FormatLocaleFile(file,"%s",magic_info[i]->name);
|
|
for (j=(ssize_t) strlen(magic_info[i]->name); j <= 9; j++)
|
|
(void) FormatLocaleFile(file," ");
|
|
(void) FormatLocaleFile(file,"%6ld ",(long) magic_info[i]->offset);
|
|
if (magic_info[i]->magic != (unsigned char *) NULL)
|
|
{
|
|
for (j=0; magic_info[i]->magic[j] != '\0'; j++)
|
|
if (isprint((int) (magic_info[i]->magic[j])) != 0)
|
|
(void) FormatLocaleFile(file,"%c",magic_info[i]->magic[j]);
|
|
else
|
|
(void) FormatLocaleFile(file,"\\%03o",(unsigned int)
|
|
((unsigned char) magic_info[i]->magic[j]));
|
|
}
|
|
(void) FormatLocaleFile(file,"\n");
|
|
}
|
|
(void) fflush(file);
|
|
magic_info=(const MagicInfo **) RelinquishMagickMemory((void *) magic_info);
|
|
return(MagickTrue);
|
|
}
|
|
|
|
/*
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% %
|
|
% %
|
|
% %
|
|
+ M a g i c C o m p o n e n t G e n e s i s %
|
|
% %
|
|
% %
|
|
% %
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% MagicComponentGenesis() instantiates the magic component.
|
|
%
|
|
% The format of the MagicComponentGenesis method is:
|
|
%
|
|
% MagickBooleanType MagicComponentGenesis(void)
|
|
%
|
|
*/
|
|
MagickPrivate MagickBooleanType MagicComponentGenesis(void)
|
|
{
|
|
if (magic_list_semaphore == (SemaphoreInfo *) NULL)
|
|
magic_list_semaphore=AcquireSemaphoreInfo();
|
|
return(MagickTrue);
|
|
}
|
|
|
|
/*
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
% %
|
|
% %
|
|
% %
|
|
+ M a g i c C o m p o n e n t T e r m i n u s %
|
|
% %
|
|
% %
|
|
% %
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
%
|
|
% MagicComponentTerminus() destroys the magic component.
|
|
%
|
|
% The format of the MagicComponentTerminus method is:
|
|
%
|
|
% MagicComponentTerminus(void)
|
|
%
|
|
*/
|
|
|
|
static void *DestroyMagicElement(void *magic_info)
|
|
{
|
|
(void) RelinquishMagickMemory((MagicInfo *) magic_info);
|
|
return((void *) NULL);
|
|
}
|
|
|
|
MagickPrivate void MagicComponentTerminus(void)
|
|
{
|
|
if (magic_list_semaphore == (SemaphoreInfo *) NULL)
|
|
ActivateSemaphoreInfo(&magic_list_semaphore);
|
|
LockSemaphoreInfo(magic_list_semaphore);
|
|
if (magic_list != (LinkedListInfo *) NULL)
|
|
magic_list=DestroyLinkedList(magic_list,DestroyMagicElement);
|
|
UnlockSemaphoreInfo(magic_list_semaphore);
|
|
RelinquishSemaphoreInfo(&magic_list_semaphore);
|
|
if (magic_cache_semaphore == (SemaphoreInfo *) NULL)
|
|
ActivateSemaphoreInfo(&magic_cache_semaphore);
|
|
LockSemaphoreInfo(magic_cache_semaphore);
|
|
if (magic_cache != (LinkedListInfo *) NULL)
|
|
magic_cache=DestroyLinkedList(magic_cache,(void *(*)(void *)) NULL);
|
|
UnlockSemaphoreInfo(magic_cache_semaphore);
|
|
RelinquishSemaphoreInfo(&magic_cache_semaphore);
|
|
}
|