MagickWand/wandcli.c

/*
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%                W     W  AA  N   N DDD   CCC L    III                        %
%                W     W A  A NN  N D  D C    L     I                         %
%                W  W  W AAAA N N N D  D C    L     I                         %
%                 W W W  A  A N  NN D  D C    L     I                         %
%                  W W   A  A N   N DDD   CCC LLLL III                        %
%                                                                             %
%                         WandCLI Structure Methods                           %
%                                                                             %
%                              Dragon Computing                               %
%                              Anthony Thyssen                                %
%                                 April 2011                                  %
%                                                                             %
%  Copyright 1999-2016 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.                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% General methds for handling the WandCLI structure used for Command Line.
%
% Anthony Thyssen, April 2011
*/

/*
  Include declarations.
*/
#include "MagickWand/studio.h"
#include "MagickWand/MagickWand.h"
#include "MagickWand/wand.h"
#include "MagickWand/magick-wand-private.h"
#include "MagickWand/wandcli.h"
#include "MagickWand/wandcli-private.h"
#include "MagickCore/exception.h"

/*
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+   A c q u i r e W a n d C L I                                               %
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%
%  AcquireMagickCLI() creates a new CLI wand (an expanded form of Magick
%  Wand). The given image_info and exception is included as is if provided.
%
%  Use DestroyMagickCLI() to dispose of the CLI wand when it is no longer
%  needed.
%
%  The format of the NewMagickWand method is:
%
%      MagickCLI *AcquireMagickCLI(ImageInfo *image_info,
%           ExceptionInfo *exception)
%
*/
WandExport MagickCLI *AcquireMagickCLI(ImageInfo *image_info,
    ExceptionInfo *exception)
{
  MagickCLI
    *cli_wand;

  /* precaution - as per NewMagickWand() */
  {
     size_t depth = MAGICKCORE_QUANTUM_DEPTH;
     const char *quantum = GetMagickQuantumDepth(&depth);
     if (depth != MAGICKCORE_QUANTUM_DEPTH)
       ThrowWandFatalException(WandError,"QuantumDepthMismatch",quantum);
  }

  /* allocate memory for MgaickCLI */
  cli_wand=(MagickCLI *) AcquireMagickMemory(sizeof(*cli_wand));
  if (cli_wand == (MagickCLI *) NULL)
    ThrowWandFatalException(ResourceLimitFatalError,"MemoryAllocationFailed",
      GetExceptionMessage(errno));

  /* Initialize Wand Part of MagickCLI
     FUTURE: this is a repeat of code from NewMagickWand()
     However some parts may be given fro man external source!
  */
  cli_wand->wand.id=AcquireWandId();
  (void) FormatLocaleString(cli_wand->wand.name,MagickPathExtent,
           "%s-%.20g","MagickWandCLI", (double) cli_wand->wand.id);
  cli_wand->wand.images=NewImageList();
  if ( image_info == (ImageInfo *) NULL)
    cli_wand->wand.image_info=AcquireImageInfo();
  else
    cli_wand->wand.image_info=image_info;
  if ( exception == (ExceptionInfo *) NULL)
    cli_wand->wand.exception=AcquireExceptionInfo();
  else
    cli_wand->wand.exception=exception;
  cli_wand->wand.debug=IsEventLogging();
  cli_wand->wand.signature=MagickWandSignature;

  /* Initialize CLI Part of MagickCLI */
  cli_wand->draw_info=CloneDrawInfo(cli_wand->wand.image_info,(DrawInfo *) NULL);
  cli_wand->quantize_info=AcquireQuantizeInfo(cli_wand->wand.image_info);
  cli_wand->process_flags=MagickCommandOptionFlags;  /* assume "magick" CLI */
  cli_wand->command=(const OptionInfo *) NULL;     /* no option at this time */
  cli_wand->image_list_stack=(Stack *) NULL;
  cli_wand->image_info_stack=(Stack *) NULL;

  /* default exception location...
     EG: sprintf(locaiton, filename, line, column);
  */
  cli_wand->location="from \"%s\"";   /* location format using arguments: */
                                      /*      filename, line, column */
  cli_wand->filename="unknown";       /* script filename, unknown source */
  cli_wand->line=0;                   /* line from script OR CLI argument */
  cli_wand->column=0;                 /* column from script */

  cli_wand->signature=MagickWandSignature;
  if (IfMagickTrue(cli_wand->wand.debug))
    (void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",cli_wand->wand.name);
  return(cli_wand);
}

/*
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%                                                                             %
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+   D e s t r o y W a n d C L I                                               %
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%
%  DestroyMagickCLI() destorys everything in a CLI wand, including image_info
%  and any exceptions, if still present in the wand.
%
%  The format of the NewMagickWand method is:
%
%    MagickWand *DestroyMagickCLI()
%            Exception *exception)
%
*/
WandExport MagickCLI *DestroyMagickCLI(MagickCLI *cli_wand)
{
  Stack
    *node;

  assert(cli_wand != (MagickCLI *) NULL);
  assert(cli_wand->signature == MagickWandSignature);
  assert(cli_wand->wand.signature == MagickWandSignature);
  if (IfMagickTrue(cli_wand->wand.debug))
    (void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",cli_wand->wand.name);

  /* Destroy CLI part of MagickCLI */
  if (cli_wand->draw_info != (DrawInfo *) NULL )
    cli_wand->draw_info=DestroyDrawInfo(cli_wand->draw_info);
  if (cli_wand->quantize_info != (QuantizeInfo *) NULL )
    cli_wand->quantize_info=DestroyQuantizeInfo(cli_wand->quantize_info);
  while(cli_wand->image_list_stack != (Stack *) NULL)
    {
      node=cli_wand->image_list_stack;
      cli_wand->image_list_stack=node->next;
      (void) DestroyImageList((Image *)node->data);
      (void) RelinquishMagickMemory(node);
    }
  while(cli_wand->image_info_stack != (Stack *) NULL)
    {
      node=cli_wand->image_info_stack;
      cli_wand->image_info_stack=node->next;
      (void) DestroyImageInfo((ImageInfo *)node->data);
      (void) RelinquishMagickMemory(node);
    }
  cli_wand->signature=(~MagickWandSignature);

  /* Destroy Wand part MagickCLI */
  cli_wand->wand.images=DestroyImageList(cli_wand->wand.images);
  if (cli_wand->wand.image_info != (ImageInfo *) NULL )
    cli_wand->wand.image_info=DestroyImageInfo(cli_wand->wand.image_info);
  if (cli_wand->wand.exception != (ExceptionInfo *) NULL )
    cli_wand->wand.exception=DestroyExceptionInfo(cli_wand->wand.exception);
  RelinquishWandId(cli_wand->wand.id);
  cli_wand->wand.signature=(~MagickWandSignature);
  cli_wand=(MagickCLI *) RelinquishMagickMemory(cli_wand);
  return((MagickCLI *) NULL);
}

/*
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%                                                                             %
%                                                                             %
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+   C L I C a t c h E x c e p t i o n                                         %
%                                                                             %
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%
%  CLICatchException() will report exceptions, either just non-fatal warnings
%  only, or all errors, according to 'all_execeptions' boolean argument.
%
%  The function returns true if errors are fatal, in which case the caller
%  should abort and re-call with an 'all_exceptions' argument of true before
%  quitting.
%
%  The cut-off level between fatal and non-fatal may be controlled by options
%  (FUTURE), but defaults to 'Error' exceptions.
%
%  The format of the CLICatchException method is:
%
%    MagickBooleanType CLICatchException(MagickCLI *cli_wand,
%              const MagickBooleanType all_exceptions );
%
%  Arguments are
%
%    o cli_wand:   The Wand CLI that holds the exception Information
%
%    o all_exceptions:   Report all exceptions, including the fatal one
%
*/
WandExport MagickBooleanType CLICatchException(MagickCLI *cli_wand,
  const MagickBooleanType all_exceptions)
{
  MagickBooleanType
    status;

  assert(cli_wand != (MagickCLI *) NULL);
  assert(cli_wand->signature == MagickWandSignature);
  assert(cli_wand->wand.signature == MagickWandSignature);
  if (cli_wand->wand.debug != MagickFalse)
    (void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",cli_wand->wand.name);

  // FUTURE: '-regard_warning' should make this more sensitive.
  // Note pipelined options may like more control over this level

  status=cli_wand->wand.exception->severity > ErrorException ? MagickTrue :
    MagickFalse;

  if ((status == MagickFalse) || (all_exceptions != MagickFalse))
    CatchException(cli_wand->wand.exception); /* output and clear exceptions */

  return(status);
}

/*
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+   C L I L o g E v e n t                                                     %
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%
% CLILogEvent() is a wrapper around LogMagickEvent(), adding to it the
% location of the option that is (about) to be executed.
%
*/
WandExport MagickBooleanType CLILogEvent(MagickCLI *cli_wand,
     const LogEventType type,const char *module,const char *function,
     const size_t line,const char *format,...)
{
  char
    new_format[MagickPathExtent];

  MagickBooleanType
    status;

  va_list
    operands;

  /* HACK - prepend the CLI location to format string.
     The better way would be add more arguments to to the 'va' oparands
     list, but that does not appear to be possible! So we do some
     pre-formating of the location info here.
  */
  (void) FormatLocaleString(new_format,MagickPathExtent,cli_wand->location,
       cli_wand->filename, cli_wand->line, cli_wand->column);
  (void) ConcatenateMagickString(new_format," ",MagickPathExtent);
  (void) ConcatenateMagickString(new_format,format,MagickPathExtent);

  va_start(operands,format);
  status=LogMagickEventList(type,module,function,line,new_format,operands);
  va_end(operands);

  return(status);
}

/*
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+   C L I T h r o w E x c e p t i o n                                         %
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%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% CLIThrowException() is a wrapper around ThrowMagickException(), adding to
% it the location of the option that caused the exception to occur.
*/
WandExport MagickBooleanType CLIThrowException(MagickCLI *cli_wand,
  const char *module,const char *function,const size_t line,
  const ExceptionType severity,const char *tag,const char *format,...)
{
  char
    new_format[MagickPathExtent];

  size_t
    len;

  MagickBooleanType
    status;

  va_list
    operands;

  /* HACK - append location to format string.
     The better way would be add more arguments to to the 'va' oparands
     list, but that does not appear to be possible! So we do some
     pre-formating of the location info here.
  */
  (void) CopyMagickString(new_format,format,MagickPathExtent);
  (void) ConcatenateMagickString(new_format," ",MagickPathExtent);

  len=strlen(new_format);
  (void) FormatLocaleString(new_format+len,MagickPathExtent-len,
    cli_wand->location,cli_wand->filename,cli_wand->line,cli_wand->column);

  va_start(operands,format);
  status=ThrowMagickExceptionList(cli_wand->wand.exception,module,function,
    line,severity,tag,new_format,operands);
  va_end(operands);
  return(status);
}