root/magick/magick.c

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DEFINITIONS

This source file includes following definitions.
  1. SignalHandler
  2. GetImageDecoder
  3. GetImageEncoder
  4. GetImageMagick
  5. GetMagickAdjoin
  6. GetMagickBlobSupport
  7. GetMagickDescription
  8. GetMagickEndianSupport
  9. GetMagickInfo
  10. GetMagickInfoList
  11. GetMagickList
  12. GetMagickMimeType
  13. GetMagickPrecision
  14. GetMagickRawSupport
  15. GetMagickSeekableStream
  16. GetMagickThreadSupport
  17. DestroyMagickNode
  18. InitializeMagickList
  19. IsMagickConflict
  20. ListMagickInfo
  21. IsMagickInstantiated
  22. MagickComponentGenesis
  23. MagickComponentTerminus
  24. SetMagickSignalHandler
  25. MagickSignalHandler
  26. RegisterMagickSignalHandler
  27. MagickCoreGenesis
  28. MagickCoreTerminus
  29. RegisterMagickInfo
  30. SetMagickInfo
  31. SetMagickPrecision
  32. UnregisterMagickInfo

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%                  M   M   AAA    GGGG  IIIII   CCCC  K   K                   %
%                  MM MM  A   A  G        I    C      K  K                    %
%                  M M M  AAAAA  G GGG    I    C      KKK                     %
%                  M   M  A   A  G   G    I    C      K  K                    %
%                  M   M  A   A   GGGG  IIIII   CCCC  K   K                   %
%                                                                             %
%                                                                             %
%               Methods to Read or List ImageMagick Image formats             %
%                                                                             %
%                            Software Design                                  %
%                            Bob Friesenhahn                                  %
%                              John Cristy                                    %
%                             November 1998                                   %
%                                                                             %
%                                                                             %
%  Copyright 1999-2013 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/annotate.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/cache.h"
#include "magick/coder.h"
#include "magick/client.h"
#include "magick/coder.h"
#include "magick/configure.h"
#include "magick/constitute.h"
#include "magick/delegate.h"
#include "magick/draw.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/locale_.h"
#include "magick/log.h"
#include "magick/magic.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/mime.h"
#include "magick/module.h"
#if defined(MAGICKCORE_WINDOWS_SUPPORT)
# include "magick/nt-feature.h"
#endif
#include "magick/random_.h"
#include "magick/registry.h"
#include "magick/resource_.h"
#include "magick/policy.h"
#include "magick/semaphore.h"
#include "magick/semaphore-private.h"
#include "magick/signature-private.h"
#include "magick/splay-tree.h"
#include "magick/string_.h"
#include "magick/string-private.h"
#include "magick/thread_.h"
#include "magick/thread-private.h"
#include "magick/token.h"
#include "magick/utility.h"
#include "magick/xwindow-private.h"

/*
  Define declarations.
*/
#if !defined(MAGICKCORE_RETSIGTYPE)
# define MAGICKCORE_RETSIGTYPE  void
#endif
#if !defined(SIG_DFL)
# define SIG_DFL  ((SignalHandler *) 0)
#endif
#if !defined(SIG_ERR)
# define SIG_ERR  ((SignalHandler *) -1)
#endif
#if !defined(SIGMAX)
#define SIGMAX  64
#endif

/*
  Typedef declarations.
*/
typedef MAGICKCORE_RETSIGTYPE
  SignalHandler(int);

/*
  Global declarations.
*/
static SemaphoreInfo
  *magick_semaphore = (SemaphoreInfo *) NULL;

static SignalHandler
  *signal_handlers[SIGMAX] = { (SignalHandler *) NULL };

static SplayTreeInfo
  *magick_list = (SplayTreeInfo *) NULL;

static volatile MagickBooleanType
  instantiate_magick = MagickFalse,
  instantiate_magickcore = MagickFalse;

/*
  Forward declarations.
*/
static MagickBooleanType
  InitializeMagickList(ExceptionInfo *);

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t I m a g e D e c o d e r                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetImageDecoder() returns the image decoder.
%
%  The format of the GetImageDecoder method is:
%
%      DecodeImageHandler *GetImageDecoder(const MagickInfo *magick_info)
%
%  A description of each parameter follows:
%
%    o magick_info:  The magick info.
%
*/
MagickExport DecodeImageHandler *GetImageDecoder(const MagickInfo *magick_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(magick_info != (MagickInfo *) NULL);
  assert(magick_info->signature == MagickSignature);
  return(magick_info->decoder);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t I m a g e E n c o d e r                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetImageEncoder() returns the image encoder.
%
%  The format of the GetImageEncoder method is:
%
%      EncodeImageHandler *GetImageEncoder(const MagickInfo *magick_info)
%
%  A description of each parameter follows:
%
%    o magick_info:  The magick info.
%
*/
MagickExport EncodeImageHandler *GetImageEncoder(const MagickInfo *magick_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(magick_info != (MagickInfo *) NULL);
  assert(magick_info->signature == MagickSignature);
  return(magick_info->encoder);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t I m a g e M a g i c k                                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetImageMagick() searches for an image format that matches the specified
%  magick string.  If one is found, MagickTrue is returned otherwise
%  MagickFalse.
%
%  The format of the GetImageMagick method is:
%
%      MagickBooleanType GetImageMagick(const unsigned char *magick,
%        const size_t length,char *format)
%
%  A description of each parameter follows:
%
%    o magick: the image format we are searching for.
%
%    o length: the length of the binary string.
%
%    o format: the image format as determined by the magick bytes.
%
*/
MagickExport MagickBooleanType GetImageMagick(const unsigned char *magick,
  const size_t length,char *format)
{
  ExceptionInfo
    *exception;

  MagickBooleanType
    status;

  register const MagickInfo
    *p;

  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(magick != (const unsigned char *) NULL);
  exception=AcquireExceptionInfo();
  p=GetMagickInfo("*",exception);
  exception=DestroyExceptionInfo(exception);
  if (p == (const MagickInfo *) NULL)
    return(MagickFalse);
  status=MagickFalse;
  LockSemaphoreInfo(magick_semaphore);
  ResetSplayTreeIterator(magick_list);
  p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
  while (p != (const MagickInfo *) NULL)
  {
    if ((p->magick != (IsImageFormatHandler *) NULL) &&
        (p->magick(magick,length) != 0))
      {
        status=MagickTrue;
        (void) CopyMagickString(format,p->name,MaxTextExtent);
        break;
      }
    p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
  }
  UnlockSemaphoreInfo(magick_semaphore);
  return(status);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t M a g i c k A d j o i n                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickAdjoin() returns MagickTrue if the magick adjoin is MagickTrue.
%
%  The format of the GetMagickAdjoin method is:
%
%      MagickBooleanType GetMagickAdjoin(const MagickInfo *magick_info)
%
%  A description of each parameter follows:
%
%    o magick_info:  The magick info.
%
*/
MagickExport MagickBooleanType GetMagickAdjoin(const MagickInfo *magick_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(magick_info != (MagickInfo *) NULL);
  assert(magick_info->signature == MagickSignature);
  return(magick_info->adjoin);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t M a g i c k B l o b S u p p o r t                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickBlobSupport() returns MagickTrue if the magick supports blobs.
%
%  The format of the GetMagickBlobSupport method is:
%
%      MagickBooleanType GetMagickBlobSupport(const MagickInfo *magick_info)
%
%  A description of each parameter follows:
%
%    o magick_info:  The magick info.
%
*/
MagickExport MagickBooleanType GetMagickBlobSupport(
  const MagickInfo *magick_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(magick_info != (MagickInfo *) NULL);
  assert(magick_info->signature == MagickSignature);
  return(magick_info->blob_support);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t M a g i c k D e s c r i p t i o n                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickDescription() returns the magick description.
%
%  The format of the GetMagickDescription method is:
%
%      const char *GetMagickDescription(const MagickInfo *magick_info)
%
%  A description of each parameter follows:
%
%    o magick_info:  The magick info.
%
*/
MagickExport const char *GetMagickDescription(const MagickInfo *magick_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(magick_info != (MagickInfo *) NULL);
  assert(magick_info->signature == MagickSignature);
  return(magick_info->description);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t M a g i c k E n d i a n S u p p o r t                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickEndianSupport() returns the MagickTrue if the coder respects
%  endianness other than MSBEndian.
%
%  The format of the GetMagickEndianSupport method is:
%
%      MagickBooleanType GetMagickEndianSupport(const MagickInfo *magick_info)
%
%  A description of each parameter follows:
%
%    o magick_info:  The magick info.
%
*/
MagickExport MagickBooleanType GetMagickEndianSupport(
  const MagickInfo *magick_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(magick_info != (MagickInfo *) NULL);
  assert(magick_info->signature == MagickSignature);
  return(magick_info->endian_support);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t M a g i c k I n f o                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickInfo() returns a pointer MagickInfo structure that matches
%  the specified name.  If name is NULL, the head of the image format list
%  is returned.
%
%  The format of the GetMagickInfo method is:
%
%      const MagickInfo *GetMagickInfo(const char *name,Exception *exception)
%
%  A description of each parameter follows:
%
%    o name: the image format we are looking for.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport const MagickInfo *GetMagickInfo(const char *name,
  ExceptionInfo *exception)
{
  register const MagickInfo
    *p;

  assert(exception != (ExceptionInfo *) NULL);
  if ((magick_list == (SplayTreeInfo *) NULL) ||
      (instantiate_magick == MagickFalse))
    if (InitializeMagickList(exception) == MagickFalse)
      return((const MagickInfo *) NULL);
  if ((name == (const char *) NULL) || (LocaleCompare(name,"*") == 0))
    {
#if defined(MAGICKCORE_MODULES_SUPPORT)
      if (LocaleCompare(name,"*") == 0)
        (void) OpenModules(exception);
#endif
      LockSemaphoreInfo(magick_semaphore);
      ResetSplayTreeIterator(magick_list);
      p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
      UnlockSemaphoreInfo(magick_semaphore);
      return(p);
    }
  /*
    Find name in list.
  */
  LockSemaphoreInfo(magick_semaphore);
  ResetSplayTreeIterator(magick_list);
  p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
  while (p != (const MagickInfo *) NULL)
  {
    if (LocaleCompare(p->name,name) == 0)
      break;
    p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
  }
#if defined(MAGICKCORE_MODULES_SUPPORT)
  if (p == (const MagickInfo *) NULL)
    {
      if (*name != '\0')
        (void) OpenModule(name,exception);
      ResetSplayTreeIterator(magick_list);
      p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
      while (p != (const MagickInfo *) NULL)
      {
        if (LocaleCompare(p->name,name) == 0)
          break;
        p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
      }
    }
#endif
  UnlockSemaphoreInfo(magick_semaphore);
  return(p);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t M a g i c k I n f o L i s t                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickInfoList() returns any image formats that match the specified
%  pattern.
%
%  The format of the GetMagickInfoList function is:
%
%      const MagickInfo **GetMagickInfoList(const char *pattern,
%        size_t *number_formats,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o pattern: Specifies a pointer to a text string containing a pattern.
%
%    o number_formats:  This integer returns the number of formats in the list.
%
%    o exception: return any errors or warnings in this structure.
%
*/

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

static int MagickInfoCompare(const void *x,const void *y)
{
  const MagickInfo
    **p,
    **q;

  p=(const MagickInfo **) x,
  q=(const MagickInfo **) y;
  return(LocaleCompare((*p)->name,(*q)->name));
}

#if defined(__cplusplus) || defined(c_plusplus)
}
#endif

MagickExport const MagickInfo **GetMagickInfoList(const char *pattern,
  size_t *number_formats,ExceptionInfo *exception)
{
  const MagickInfo
    **formats;

  register const MagickInfo
    *p;

  register ssize_t
    i;

  /*
    Allocate magick list.
  */
  assert(pattern != (char *) NULL);
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",pattern);
  assert(number_formats != (size_t *) NULL);
  *number_formats=0;
  p=GetMagickInfo("*",exception);
  if (p == (const MagickInfo *) NULL)
    return((const MagickInfo **) NULL);
  formats=(const MagickInfo **) AcquireQuantumMemory((size_t)
    GetNumberOfNodesInSplayTree(magick_list)+1UL,sizeof(*formats));
  if (formats == (const MagickInfo **) NULL)
    return((const MagickInfo **) NULL);
  /*
    Generate magick list.
  */
  LockSemaphoreInfo(magick_semaphore);
  ResetSplayTreeIterator(magick_list);
  p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
  for (i=0; p != (const MagickInfo *) NULL; )
  {
    if ((p->stealth == MagickFalse) &&
        (GlobExpression(p->name,pattern,MagickFalse) != MagickFalse))
      formats[i++]=p;
    p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
  }
  UnlockSemaphoreInfo(magick_semaphore);
  qsort((void *) formats,(size_t) i,sizeof(*formats),MagickInfoCompare);
  formats[i]=(MagickInfo *) NULL;
  *number_formats=(size_t) i;
  return(formats);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t M a g i c k L i s t                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickList() returns any image formats that match the specified pattern.
%
%  The format of the GetMagickList function is:
%
%      char **GetMagickList(const char *pattern,size_t *number_formats,
%        ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o pattern: Specifies a pointer to a text string containing a pattern.
%
%    o number_formats:  This integer returns the number of formats in the list.
%
%    o exception: return any errors or warnings in this structure.
%
*/

#if defined(__cplusplus) || defined(c_plusplus)
extern "C" {
#endif

static int MagickCompare(const void *x,const void *y)
{
  register 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 **GetMagickList(const char *pattern,
  size_t *number_formats,ExceptionInfo *exception)
{
  char
    **formats;

  register const MagickInfo
    *p;

  register ssize_t
    i;

  /*
    Allocate magick list.
  */
  assert(pattern != (char *) NULL);
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",pattern);
  assert(number_formats != (size_t *) NULL);
  *number_formats=0;
  p=GetMagickInfo("*",exception);
  if (p == (const MagickInfo *) NULL)
    return((char **) NULL);
  formats=(char **) AcquireQuantumMemory((size_t)
    GetNumberOfNodesInSplayTree(magick_list)+1UL,sizeof(*formats));
  if (formats == (char **) NULL)
    return((char **) NULL);
  LockSemaphoreInfo(magick_semaphore);
  ResetSplayTreeIterator(magick_list);
  p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
  for (i=0; p != (const MagickInfo *) NULL; )
  {
    if ((p->stealth == MagickFalse) &&
        (GlobExpression(p->name,pattern,MagickFalse) != MagickFalse))
      formats[i++]=ConstantString(p->name);
    p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
  }
  UnlockSemaphoreInfo(magick_semaphore);
  qsort((void *) formats,(size_t) i,sizeof(*formats),MagickCompare);
  formats[i]=(char *) NULL;
  *number_formats=(size_t) i;
  return(formats);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t M a g i c k M i m e T y p e                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickMimeType() returns the magick mime type.
%
%  The format of the GetMagickMimeType method is:
%
%      const char *GetMagickMimeType(const MagickInfo *magick_info)
%
%  A mime_type of each parameter follows:
%
%    o magick_info:  The magick info.
%
*/
MagickExport const char *GetMagickMimeType(const MagickInfo *magick_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(magick_info != (MagickInfo *) NULL);
  assert(magick_info->signature == MagickSignature);
  return(magick_info->mime_type);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   G e t M a g i c k P r e c i s i o n                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickPrecision() returns the maximum number of significant digits to be
%  printed.
%
%  The format of the GetMagickPrecision method is:
%
%      int GetMagickPrecision(void)
%
*/
MagickExport int GetMagickPrecision(void)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  return(SetMagickPrecision(0));
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t M a g i c k R a w S u p p o r t                                     %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickRawSupport() returns the MagickTrue if the coder is a raw format.
%
%  The format of the GetMagickRawSupport method is:
%
%      MagickBooleanType GetMagickRawSupport(const MagickInfo *magick_info)
%
%  A description of each parameter follows:
%
%    o magick_info:  The magick info.
%
*/
MagickExport MagickBooleanType GetMagickRawSupport(
  const MagickInfo *magick_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(magick_info != (MagickInfo *) NULL);
  assert(magick_info->signature == MagickSignature);
  return(magick_info->raw);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t M a g i c k S e e k a b l e S t r e a m                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickSeekableStream() returns MagickTrue if the magick supports a
%  seekable stream.
%
%  The format of the GetMagickSeekableStream method is:
%
%      MagickBooleanType GetMagickSeekableStream(const MagickInfo *magick_info)
%
%  A description of each parameter follows:
%
%    o magick_info:  The magick info.
%
*/
MagickExport MagickBooleanType GetMagickSeekableStream(
  const MagickInfo *magick_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(magick_info != (MagickInfo *) NULL);
  assert(magick_info->signature == MagickSignature);
  return(magick_info->seekable_stream);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   G e t M a g i c k T h r e a d S u p p o r t                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  GetMagickThreadSupport() returns MagickTrue if the magick supports threads.
%
%  The format of the GetMagickThreadSupport method is:
%
%      MagickStatusType GetMagickThreadSupport(const MagickInfo *magick_info)
%
%  A description of each parameter follows:
%
%    o magick_info:  The magick info.
%
*/
MagickExport MagickStatusType GetMagickThreadSupport(
  const MagickInfo *magick_info)
{
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  assert(magick_info != (MagickInfo *) NULL);
  assert(magick_info->signature == MagickSignature);
  return(magick_info->thread_support);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   I n i t i a l i z e M a g i c k L i s t                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  InitializeMagickList() initializes the magick list.
%
%  The format of the InitializeMagickList() method is:
%
%      InitializeMagickList(Exceptioninfo *exception)
%
%  A description of each parameter follows.
%
%    o exception: return any errors or warnings in this structure.
%
*/

static void *DestroyMagickNode(void *magick_info)
{
  register MagickInfo
    *p;

  p=(MagickInfo *) magick_info;
  if (p->module != (char *) NULL)
    p->module=DestroyString(p->module);
  if (p->note != (char *) NULL)
    p->note=DestroyString(p->note);
  if (p->mime_type != (char *) NULL)
    p->mime_type=DestroyString(p->mime_type);
  if (p->version != (char *) NULL)
    p->version=DestroyString(p->version);
  if (p->description != (char *) NULL)
    p->description=DestroyString(p->description);
  if (p->name != (char *) NULL)
    p->name=DestroyString(p->name);
  return(RelinquishMagickMemory(p));
}

static MagickBooleanType InitializeMagickList(ExceptionInfo *exception)
{
  (void) exception;
  if ((magick_list == (SplayTreeInfo *) NULL) &&
      (instantiate_magick == MagickFalse))
    {
      if (magick_semaphore == (SemaphoreInfo *) NULL)
        AcquireSemaphoreInfo(&magick_semaphore);
      LockSemaphoreInfo(magick_semaphore);
      if ((magick_list == (SplayTreeInfo *) NULL) &&
          (instantiate_magick == MagickFalse))
        {
          MagickBooleanType
            status;

          MagickInfo
            *magick_info;

          magick_list=NewSplayTree(CompareSplayTreeString,
            (void *(*)(void *)) NULL,DestroyMagickNode);
          if (magick_list == (SplayTreeInfo *) NULL)
            ThrowFatalException(ResourceLimitFatalError,
              "MemoryAllocationFailed");
          magick_info=SetMagickInfo("ephemeral");
          magick_info->stealth=MagickTrue;
          status=AddValueToSplayTree(magick_list,magick_info->name,magick_info);
          if (status == MagickFalse)
            ThrowFatalException(ResourceLimitFatalError,
              "MemoryAllocationFailed");
          magick_info=SetMagickInfo("clipmask");
          magick_info->stealth=MagickTrue;
          status=AddValueToSplayTree(magick_list,magick_info->name,magick_info);
          if (status == MagickFalse)
            {
              char
                *message;

              message=GetExceptionMessage(errno);
              ThrowFatalException(ResourceLimitFatalError,
                "MemoryAllocationFailed");
              message=DestroyString(message);
            }
#if defined(MAGICKCORE_MODULES_SUPPORT)
          (void) GetModuleInfo((char *) NULL,exception);
#endif
#if !defined(MAGICKCORE_BUILD_MODULES)
          RegisterStaticModules();
#endif
          instantiate_magick=MagickTrue;
        }
      UnlockSemaphoreInfo(magick_semaphore);
    }
  return(magick_list != (SplayTreeInfo *) NULL ? MagickTrue : MagickFalse);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   I s M a g i c k C o n f l i c t                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IsMagickConflict() returns MagickTrue if the image format conflicts with a
%  logical drive (.e.g. X:).
%
%  The format of the IsMagickConflict method is:
%
%      MagickBooleanType IsMagickConflict(const char *magick)
%
%  A description of each parameter follows:
%
%    o magick: Specifies the image format.
%
*/
MagickExport MagickBooleanType IsMagickConflict(const char *magick)
{
  assert(magick != (char *) NULL);
#if defined(macintosh)
  return(MACIsMagickConflict(magick));
#elif defined(vms)
  return(VMSIsMagickConflict(magick));
#elif defined(MAGICKCORE_WINDOWS_SUPPORT)
  return(NTIsMagickConflict(magick));
#else
  return(MagickFalse);
#endif
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+  L i s t M a g i c k I n f o                                                %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  ListMagickInfo() lists the image formats to a file.
%
%  The format of the ListMagickInfo method is:
%
%      MagickBooleanType ListMagickInfo(FILE *file,ExceptionInfo *exception)
%
%  A description of each parameter follows.
%
%    o file: A file handle.
%
%    o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType ListMagickInfo(FILE *file,
  ExceptionInfo *exception)
{
  const MagickInfo
    **magick_info;

  register ssize_t
    i;

  size_t
    number_formats;

  ssize_t
    j;

  if (file == (FILE *) NULL)
    file=stdout;
  magick_info=GetMagickInfoList("*",&number_formats,exception);
  if (magick_info == (const MagickInfo **) NULL)
    return(MagickFalse);
  ClearMagickException(exception);
#if !defined(MAGICKCORE_MODULES_SUPPORT)
  (void) FormatLocaleFile(file,"   Format  Mode  Description\n");
#else
  (void) FormatLocaleFile(file,"   Format  Module    Mode  Description\n");
#endif
  (void) FormatLocaleFile(file,
    "--------------------------------------------------------"
    "-----------------------\n");
  for (i=0; i < (ssize_t) number_formats; i++)
  {
    if (magick_info[i]->stealth != MagickFalse)
      continue;
    (void) FormatLocaleFile(file,"%9s%c ",
      magick_info[i]->name != (char *) NULL ? magick_info[i]->name : "",
      magick_info[i]->blob_support != MagickFalse ? '*' : ' ');
#if defined(MAGICKCORE_MODULES_SUPPORT)
    {
      char
        module[MaxTextExtent];

      *module='\0';
      if (magick_info[i]->module != (char *) NULL)
        (void) CopyMagickString(module,magick_info[i]->module,MaxTextExtent);
      (void) ConcatenateMagickString(module,"          ",MaxTextExtent);
      module[9]='\0';
      (void) FormatLocaleFile(file,"%9s ",module);
    }
#endif
    (void) FormatLocaleFile(file,"%c%c%c ",magick_info[i]->decoder ? 'r' : '-',
      magick_info[i]->encoder ? 'w' : '-',magick_info[i]->encoder != NULL &&
      magick_info[i]->adjoin != MagickFalse ? '+' : '-');
    if (magick_info[i]->description != (char *) NULL)
      (void) FormatLocaleFile(file,"  %s",magick_info[i]->description);
    if (magick_info[i]->version != (char *) NULL)
      (void) FormatLocaleFile(file," (%s)",magick_info[i]->version);
    (void) FormatLocaleFile(file,"\n");
    if (magick_info[i]->note != (char *) NULL)
      {
        char
          **text;

        text=StringToList(magick_info[i]->note);
        if (text != (char **) NULL)
          {
            for (j=0; text[j] != (char *) NULL; j++)
            {
              (void) FormatLocaleFile(file,"           %s\n",text[j]);
              text[j]=DestroyString(text[j]);
            }
            text=(char **) RelinquishMagickMemory(text);
          }
      }
  }
  (void) FormatLocaleFile(file,"\n* native blob support\n");
  (void) FormatLocaleFile(file,"r read support\n");
  (void) FormatLocaleFile(file,"w write support\n");
  (void) FormatLocaleFile(file,"+ support for multiple images\n");
  (void) fflush(file);
  magick_info=(const MagickInfo **) RelinquishMagickMemory((void *)
    magick_info);
  return(MagickTrue);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%  I s M a g i c k I n s t a n t i a t e d                                    %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  IsMagickInstantiated() returns MagickTrue if the ImageMagick environment
%  is currently instantiated:  MagickCoreGenesis() has been called but
%  MagickDestroy() has not.
%
%  The format of the IsMagickInstantiated method is:
%
%      MagickBooleanType IsMagickInstantiated(void)
%
*/
MagickExport MagickBooleanType IsMagickInstantiated(void)
{
  return(instantiate_magick);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   M a g i c k C o m p o n e n t G e n e s i s                               %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  MagickComponentGenesis() instantiates the magick component.
%
%  The format of the MagickComponentGenesis method is:
%
%      MagickBooleanType MagickComponentGenesis(void)
%
*/
MagickExport MagickBooleanType MagickComponentGenesis(void)
{
  AcquireSemaphoreInfo(&magick_semaphore);
  return(MagickTrue);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   M a g i c k C o m p o n e n t T e r m i n u s                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  MagickComponentTerminus() destroys the magick component.
%
%  The format of the MagickComponentTerminus method is:
%
%      void MagickComponentTerminus(void)
%
*/
MagickExport void MagickComponentTerminus(void)
{
  if (magick_semaphore == (SemaphoreInfo *) NULL)
    AcquireSemaphoreInfo(&magick_semaphore);
  LockSemaphoreInfo(magick_semaphore);
  if (magick_list != (SplayTreeInfo *) NULL)
    magick_list=DestroySplayTree(magick_list);
  instantiate_magick=MagickFalse;
  UnlockSemaphoreInfo(magick_semaphore);
  DestroySemaphoreInfo(&magick_semaphore);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   M a g i c k C o r e G e n e s i s                                         %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  MagickCoreGenesis() initializes the MagickCore environment.
%
%  The format of the MagickCoreGenesis function is:
%
%      MagickCoreGenesis(const char *path,
%        const MagickBooleanType establish_signal_handlers)
%
%  A description of each parameter follows:
%
%    o path: the execution path of the current ImageMagick client.
%
%    o establish_signal_handlers: set to MagickTrue to use MagickCore's own
%      signal handlers for common signals.
%
*/

static SignalHandler *SetMagickSignalHandler(int signal_number,
  SignalHandler *handler)
{
#if defined(MAGICKCORE_HAVE_SIGACTION) && defined(MAGICKCORE_HAVE_SIGEMPTYSET)
  int
    status;

  sigset_t
    mask;

  struct sigaction
    action,
    previous_action;

  sigemptyset(&mask);
  sigaddset(&mask,signal_number);
  sigprocmask(SIG_BLOCK,&mask,NULL);
  action.sa_mask=mask;
  action.sa_handler=handler;
  action.sa_flags=0;
#if defined(SA_INTERRUPT)
  action.sa_flags|=SA_INTERRUPT;
#endif
  status=sigaction(signal_number,&action,&previous_action);
  if (status < 0)
    return(SIG_ERR);
  sigprocmask(SIG_UNBLOCK,&mask,NULL);
  return(previous_action.sa_handler);
#else
  return(signal(signal_number,handler));
#endif
}

static void MagickSignalHandler(int signal_number)
{
#if !defined(MAGICKCORE_HAVE_SIGACTION)
  (void) signal(signal_number,SIG_IGN);
#endif
  AsynchronousResourceComponentTerminus();
  instantiate_magick=MagickFalse;
  (void) SetMagickSignalHandler(signal_number,signal_handlers[signal_number]);
#if defined(SIGQUIT)
  if (signal_number == SIGQUIT)
    abort();
#endif
#if defined(SIGABRT)
  if (signal_number == SIGABRT)
    abort();
#endif
#if defined(SIGFPE)
  if (signal_number == SIGFPE)
    abort();
#endif
#if defined(SIGXCPU)
  if (signal_number == SIGXCPU)
    abort();
#endif
#if defined(SIGXFSZ)
  if (signal_number == SIGXFSZ)
    abort();
#endif
#if defined(SIGSEGV)
  if (signal_number == SIGSEGV)
    abort();
#endif
#if !defined(MAGICKCORE_HAVE__EXIT)
  exit(signal_number);
#else
#if defined(SIGHUP)
  if (signal_number == SIGHUP)
    exit(signal_number);
#endif
#if defined(SIGINT) && !defined(MAGICKCORE_WINDOWS_SUPPORT)
  if (signal_number == SIGINT)
    exit(signal_number);
#endif
#if defined(SIGTERM)
  if (signal_number == SIGTERM)
    exit(signal_number);
#endif
#if defined(MAGICKCORE_HAVE_RAISE)
  if (signal_handlers[signal_number] != MagickSignalHandler)
    raise(signal_number);
#endif
  _exit(signal_number);  /* do not invoke registered atexit() methods */
#endif
}

static SignalHandler *RegisterMagickSignalHandler(int signal_number)
{
  SignalHandler
    *handler;

  handler=SetMagickSignalHandler(signal_number,MagickSignalHandler);
  if (handler == SIG_ERR)
    return(handler);
  if (handler != SIG_DFL)
    handler=SetMagickSignalHandler(signal_number,handler);
  else
    (void) LogMagickEvent(ConfigureEvent,GetMagickModule(),
      "Register handler for signal: %d",signal_number);
  return(handler);
}

MagickExport void MagickCoreGenesis(const char *path,
  const MagickBooleanType establish_signal_handlers)
{
  char
    *events,
    execution_path[MaxTextExtent],
    filename[MaxTextExtent];

  /*
    Initialize the Magick environment.
  */
  LockMagickMutex();
  if (instantiate_magickcore != MagickFalse)
    {
      UnlockMagickMutex();
      return;
    }
  (void) SemaphoreComponentGenesis();
  (void) LogComponentGenesis();
  (void) LocaleComponentGenesis();
  (void) RandomComponentGenesis();
  events=GetEnvironmentValue("MAGICK_DEBUG");
  if (events != (char *) NULL)
    {
      (void) SetLogEventMask(events);
      events=DestroyString(events);
    }
#if defined(MAGICKCORE_WINDOWS_SUPPORT)
#if defined(_DEBUG) && !defined(__BORLANDC__) && !defined(__MINGW32__) && !defined(__MINGW64__)
  if (IsEventLogging() != MagickFalse)
    {
      int
        debug;

      debug=_CrtSetDbgFlag(_CRTDBG_REPORT_FLAG);
      debug|=_CRTDBG_CHECK_ALWAYS_DF |_CRTDBG_DELAY_FREE_MEM_DF |
        _CRTDBG_LEAK_CHECK_DF;
      if (0)
        {
          debug=_CrtSetDbgFlag(debug);
          _ASSERTE(_CrtCheckMemory());
        }
    }
#endif
#endif
  /*
    Set client name and execution path.
  */
  (void) GetExecutionPath(execution_path,MaxTextExtent);
  if ((path != (const char *) NULL) && (*path == *DirectorySeparator) &&
      (IsPathAccessible(path) != MagickFalse))
    (void) CopyMagickString(execution_path,path,MaxTextExtent);
  GetPathComponent(execution_path,TailPath,filename);
  (void) SetClientName(filename);
  GetPathComponent(execution_path,HeadPath,execution_path);
  (void) SetClientPath(execution_path);
  if (establish_signal_handlers != MagickFalse)
    {
      /*
        Set signal handlers.
      */
#if defined(SIGABRT)
      if (signal_handlers[SIGABRT] == (SignalHandler *) NULL)
        signal_handlers[SIGABRT]=RegisterMagickSignalHandler(SIGABRT);
#endif
#if defined(SIGSEGV)
      if (signal_handlers[SIGSEGV] == (SignalHandler *) NULL)
        signal_handlers[SIGSEGV]=RegisterMagickSignalHandler(SIGSEGV);
#endif
#if defined(SIGFPE)
      if (signal_handlers[SIGFPE] == (SignalHandler *) NULL)
        signal_handlers[SIGFPE]=RegisterMagickSignalHandler(SIGFPE);
#endif
#if defined(SIGHUP)
      if (signal_handlers[SIGHUP] == (SignalHandler *) NULL)
        signal_handlers[SIGHUP]=RegisterMagickSignalHandler(SIGHUP);
#endif
#if defined(SIGINT) && !defined(MAGICKCORE_WINDOWS_SUPPORT)
      if (signal_handlers[SIGINT] == (SignalHandler *) NULL)
        signal_handlers[SIGINT]=RegisterMagickSignalHandler(SIGINT);
#endif
#if defined(SIGQUIT)
      if (signal_handlers[SIGQUIT] == (SignalHandler *) NULL)
        signal_handlers[SIGQUIT]=RegisterMagickSignalHandler(SIGQUIT);
#endif
#if defined(SIGTERM)
      if (signal_handlers[SIGTERM] == (SignalHandler *) NULL)
        signal_handlers[SIGTERM]=RegisterMagickSignalHandler(SIGTERM);
#endif
#if defined(SIGXCPU)
      if (signal_handlers[SIGXCPU] == (SignalHandler *) NULL)
        signal_handlers[SIGXCPU]=RegisterMagickSignalHandler(SIGXCPU);
#endif
#if defined(SIGXFSZ)
      if (signal_handlers[SIGXFSZ] == (SignalHandler *) NULL)
        signal_handlers[SIGXFSZ]=RegisterMagickSignalHandler(SIGXFSZ);
#endif
    }
  /*
    Instantiate magick resources.
  */
  (void) ConfigureComponentGenesis();
  (void) PolicyComponentGenesis();
  (void) CacheComponentGenesis();
  (void) RegistryComponentGenesis();
  (void) ResourceComponentGenesis();
  (void) CoderComponentGenesis();
  (void) MagickComponentGenesis();
#if defined(MAGICKCORE_MODULES_SUPPORT)
  (void) ModuleComponentGenesis();
#endif
  (void) DelegateComponentGenesis();
  (void) MagicComponentGenesis();
  (void) ColorComponentGenesis();
  (void) TypeComponentGenesis();
  (void) MimeComponentGenesis();
  (void) ConstituteComponentGenesis();
  (void) AnnotateComponentGenesis();
#if defined(MAGICKCORE_X11_DELEGATE)
  (void) XComponentGenesis();
#endif
  instantiate_magickcore=MagickTrue;
  UnlockMagickMutex();
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   M a g i c k C o r e T e r m i n u s                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  MagickCoreTerminus() destroys the MagickCore environment.
%
%  The format of the MagickCoreTerminus function is:
%
%      MagickCoreTerminus(void)
%
*/
MagickExport void MagickCoreTerminus(void)
{
  LockMagickMutex();
  if (instantiate_magickcore == MagickFalse)
    {
      UnlockMagickMutex();
      return;
    }
#if defined(MAGICKCORE_X11_DELEGATE)
  XComponentTerminus();
#endif
  AnnotateComponentTerminus();
  ConstituteComponentTerminus();
  MimeComponentTerminus();
  TypeComponentTerminus();
  ColorComponentTerminus();
#if defined(MAGICKCORE_WINDOWS_SUPPORT)
  NTGhostscriptUnLoadDLL();
#endif
  MagicComponentTerminus();
  DelegateComponentTerminus();
  MagickComponentTerminus();
#if !defined(MAGICKCORE_BUILD_MODULES)
  UnregisterStaticModules();
#endif
#if defined(MAGICKCORE_MODULES_SUPPORT)
  ModuleComponentTerminus();
#endif
  CoderComponentTerminus();
  ResourceComponentTerminus();
  RegistryComponentTerminus();
  CacheComponentTerminus();
  PolicyComponentTerminus();
  ConfigureComponentTerminus();
  RandomComponentTerminus();
  LocaleComponentTerminus();
  LogComponentTerminus();
  SemaphoreComponentTerminus();
  instantiate_magickcore=MagickFalse;
  UnlockMagickMutex();
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   R e g i s t e r M a g i c k I n f o                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  RegisterMagickInfo() adds attributes for a particular image format to the
%  list of supported formats.  The attributes include the image format name,
%  a method to read and/or write the format, whether the format supports the
%  saving of more than one frame to the same file or blob, whether the format
%  supports native in-memory I/O, and a brief description of the format.
%
%  The format of the RegisterMagickInfo method is:
%
%      MagickInfo *RegisterMagickInfo(MagickInfo *magick_info)
%
%  A description of each parameter follows:
%
%    o magick_info: the magick info.
%
*/
MagickExport MagickInfo *RegisterMagickInfo(MagickInfo *magick_info)
{
  MagickBooleanType
    status;

  /*
    Delete any existing name.
  */
  assert(magick_info != (MagickInfo *) NULL);
  assert(magick_info->signature == MagickSignature);
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",magick_info->name);
  if (magick_list == (SplayTreeInfo *) NULL)
    return((MagickInfo *) NULL);
  status=AddValueToSplayTree(magick_list,magick_info->name,magick_info);
  if (status == MagickFalse)
    ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
  return(magick_info);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   S e t M a g i c k I n f o                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  SetMagickInfo() allocates a MagickInfo structure and initializes the members
%  to default values.
%
%  The format of the SetMagickInfo method is:
%
%      MagickInfo *SetMagickInfo(const char *name)
%
%  A description of each parameter follows:
%
%    o magick_info: Method SetMagickInfo returns the allocated and initialized
%      MagickInfo structure.
%
%    o name: a character string that represents the image format associated
%      with the MagickInfo structure.
%
*/
MagickExport MagickInfo *SetMagickInfo(const char *name)
{
  MagickInfo
    *magick_info;

  assert(name != (const char *) NULL);
  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",name);
  magick_info=(MagickInfo *) AcquireMagickMemory(sizeof(*magick_info));
  if (magick_info == (MagickInfo *) NULL)
    ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
  (void) ResetMagickMemory(magick_info,0,sizeof(*magick_info));
  magick_info->name=ConstantString(name);
  magick_info->adjoin=MagickTrue;
  magick_info->blob_support=MagickTrue;
  magick_info->thread_support=(MagickStatusType) (DecoderThreadSupport |
    EncoderThreadSupport);
  magick_info->signature=MagickSignature;
  return(magick_info);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   S e t M a g i c k P r e c i s i o n                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  SetMagickPrecision() sets the maximum number of significant digits to be
%  printed.
%
%  An input argument of 0 returns the current precision setting.
%
%  A negative value forces the precision to reset to a default value according
%  to the environment variable "MAGICK_PRECISION", the current 'policy'
%  configuration setting, or the default value of '6', in that order.
%
%  The format of the SetMagickPrecision method is:
%
%      int SetMagickPrecision(const int precision)
%
%  A description of each parameter follows:
%
%    o precision: set the maximum number of significant digits to be printed.
%
*/
MagickExport int SetMagickPrecision(const int precision)
{
#define MagickPrecision  6

  static int
    magick_precision = 0;

  (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
  if (precision > 0)
    magick_precision=precision;
  if ((precision < 0) || (magick_precision == 0))
    {
      char
        *limit;

      /*
        Precision reset, or it has not been set yet.
      */
      magick_precision = MagickPrecision;
      limit=GetEnvironmentValue("MAGICK_PRECISION");
      if (limit == (char *) NULL)
        limit=GetPolicyValue("precision");
      if (limit != (char *) NULL)
        {
          magick_precision=StringToInteger(limit);
          limit=DestroyString(limit);
        }
    }
  return(magick_precision);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
+   U n r e g i s t e r M a g i c k I n f o                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  UnregisterMagickInfo() removes a name from the magick info list.  It returns
%  MagickFalse if the name does not exist in the list otherwise MagickTrue.
%
%  The format of the UnregisterMagickInfo method is:
%
%      MagickBooleanType UnregisterMagickInfo(const char *name)
%
%  A description of each parameter follows:
%
%    o name: a character string that represents the image format we are
%      looking for.
%
*/
MagickExport MagickBooleanType UnregisterMagickInfo(const char *name)
{
  register const MagickInfo
    *p;

  MagickBooleanType
    status;

  assert(name != (const char *) NULL);
  if (magick_list == (SplayTreeInfo *) NULL)
    return(MagickFalse);
  if (GetNumberOfNodesInSplayTree(magick_list) == 0)
    return(MagickFalse);
  LockSemaphoreInfo(magick_semaphore);
  ResetSplayTreeIterator(magick_list);
  p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
  while (p != (const MagickInfo *) NULL)
  {
    if (LocaleCompare(p->name,name) == 0)
      break;
    p=(const MagickInfo *) GetNextValueInSplayTree(magick_list);
  }
  status=DeleteNodeByValueFromSplayTree(magick_list,p);
  UnlockSemaphoreInfo(magick_semaphore);
  return(status);
}

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