/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % EEEEE X X CCCC EEEEE PPPP TTTTT IIIII OOO N N % % E X X C E P P T I O O NN N % % EEE X C EEE PPPP T I O O N N N % % E X X C E P T I O O N NN % % EEEEE X X CCCC EEEEE P T IIIII OOO N N % % % % % % MagickCore Exception Methods % % % % Software Design % % John Cristy % % July 1993 % % % % % % Copyright 1999-2010 ImageMagick Studio LLC, a non-profit organization % % dedicated to making software imaging solutions freely available. % % % % You may not use this file except in compliance with the License. You may % % obtain a copy of the License at % % % % http://www.imagemagick.org/script/license.php % % % % Unless required by applicable law or agreed to in writing, software % % distributed under the License is distributed on an "AS IS" BASIS, % % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % % See the License for the specific language governing permissions and % % limitations under the License. % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % */ /* Include declarations. */ #include "magick/studio.h" #include "magick/client.h" #include "magick/exception.h" #include "magick/exception-private.h" #include "magick/hashmap.h" #include "magick/locale_.h" #include "magick/log.h" #include "magick/magick.h" #include "magick/memory_.h" #include "magick/string_.h" #include "magick/utility.h" /* Forward declarations. */ #if defined(__cplusplus) || defined(c_plusplus) extern "C" { #endif static void DefaultErrorHandler(const ExceptionType,const char *,const char *), DefaultFatalErrorHandler(const ExceptionType,const char *,const char *), DefaultWarningHandler(const ExceptionType,const char *,const char *); #if defined(__cplusplus) || defined(c_plusplus) } #endif /* Global declarations. */ static ErrorHandler error_handler = DefaultErrorHandler; static FatalErrorHandler fatal_error_handler = DefaultFatalErrorHandler; static WarningHandler warning_handler = DefaultWarningHandler; /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % A c q u i r e E x c e p t i o n I n f o % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % AcquireExceptionInfo() allocates the ExceptionInfo structure. % % The format of the AcquireExceptionInfo method is: % % ExceptionInfo *AcquireExceptionInfo(void) % */ MagickExport ExceptionInfo *AcquireExceptionInfo(void) { ExceptionInfo *exception; exception=(ExceptionInfo *) AcquireAlignedMemory(1,sizeof(*exception)); if (exception == (ExceptionInfo *) NULL) ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed"); GetExceptionInfo(exception); exception->relinquish=MagickTrue; return(exception); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % C l e a r M a g i c k E x c e p t i o n % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ClearMagickException() clears any exception that may not have been caught % yet. % % The format of the ClearMagickException method is: % % ClearMagickException(ExceptionInfo *exception) % % A description of each parameter follows: % % o exception: the exception info. % */ static void *DestroyExceptionElement(void *exception) { register ExceptionInfo *p; p=(ExceptionInfo *) exception; if (p->reason != (char *) NULL) p->reason=DestroyString(p->reason); if (p->description != (char *) NULL) p->description=DestroyString(p->description); p=(ExceptionInfo *) RelinquishMagickMemory(p); return((void *) NULL); } MagickExport void ClearMagickException(ExceptionInfo *exception) { register ExceptionInfo *p; assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); if (exception->exceptions == (void *) NULL) return; LockSemaphoreInfo(exception->semaphore); p=(ExceptionInfo *) RemoveLastElementFromLinkedList((LinkedListInfo *) exception->exceptions); while (p != (ExceptionInfo *) NULL) { (void) DestroyExceptionElement(p); p=(ExceptionInfo *) RemoveLastElementFromLinkedList((LinkedListInfo *) exception->exceptions); } exception->severity=UndefinedException; exception->reason=(char *) NULL; exception->description=(char *) NULL; UnlockSemaphoreInfo(exception->semaphore); errno=0; } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % C a t c h E x c e p t i o n % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % CatchException() returns if no exceptions is found otherwise it reports % the exception as a warning, error, or fatal depending on the severity. % % The format of the CatchException method is: % % CatchException(ExceptionInfo *exception) % % A description of each parameter follows: % % o exception: the exception info. % */ MagickExport void CatchException(ExceptionInfo *exception) { register const ExceptionInfo *p; assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); if (exception->exceptions == (void *) NULL) return; LockSemaphoreInfo(exception->semaphore); ResetLinkedListIterator((LinkedListInfo *) exception->exceptions); p=(const ExceptionInfo *) GetNextValueInLinkedList((LinkedListInfo *) exception->exceptions); while (p != (const ExceptionInfo *) NULL) { if ((p->severity >= WarningException) && (p->severity < ErrorException)) MagickWarning(p->severity,p->reason,p->description); if ((p->severity >= ErrorException) && (p->severity < FatalErrorException)) MagickError(p->severity,p->reason,p->description); if (p->severity >= FatalErrorException) MagickFatalError(p->severity,p->reason,p->description); p=(const ExceptionInfo *) GetNextValueInLinkedList((LinkedListInfo *) exception->exceptions); } UnlockSemaphoreInfo(exception->semaphore); ClearMagickException(exception); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % + D e f a u l t E r r o r H a n d l e r % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % DefaultErrorHandler() displays an error reason. % % The format of the DefaultErrorHandler method is: % % void MagickError(const ExceptionType severity,const char *reason, % const char *description) % % A description of each parameter follows: % % o severity: Specifies the numeric error category. % % o reason: Specifies the reason to display before terminating the % program. % % o description: Specifies any description to the reason. % */ static void DefaultErrorHandler(const ExceptionType magick_unused(severity), const char *reason,const char *description) { if (reason == (char *) NULL) return; (void) fprintf(stderr,"%s: %s",GetClientName(),reason); if (description != (char *) NULL) (void) fprintf(stderr," (%s)",description); (void) fprintf(stderr,".\n"); (void) fflush(stderr); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % + D e f a u l t F a t a l E r r o r H a n d l e r % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % DefaultFatalErrorHandler() displays an error reason and then terminates the % program. % % The format of the DefaultFatalErrorHandler method is: % % void MagickFatalError(const ExceptionType severity,const char *reason, % const char *description) % % A description of each parameter follows: % % o severity: Specifies the numeric error category. % % o reason: Specifies the reason to display before terminating the % program. % % o description: Specifies any description to the reason. % */ static void DefaultFatalErrorHandler( const ExceptionType magick_unused(severity), const char *reason,const char *description) { if (reason == (char *) NULL) return; (void) fprintf(stderr,"%s: %s",GetClientName(),reason); if (description != (char *) NULL) (void) fprintf(stderr," (%s)",description); (void) fprintf(stderr,".\n"); (void) fflush(stderr); MagickCoreTerminus(); exit(1); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % + D e f a u l t W a r n i n g H a n d l e r % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % DefaultWarningHandler() displays a warning reason. % % The format of the DefaultWarningHandler method is: % % void DefaultWarningHandler(const ExceptionType severity, % const char *reason,const char *description) % % A description of each parameter follows: % % o severity: Specifies the numeric warning category. % % o reason: Specifies the reason to display before terminating the % program. % % o description: Specifies any description to the reason. % */ static void DefaultWarningHandler(const ExceptionType magick_unused(severity), const char *reason,const char *description) { if (reason == (char *) NULL) return; (void) fprintf(stderr,"%s: %s",GetClientName(),reason); if (description != (char *) NULL) (void) fprintf(stderr," (%s)",description); (void) fprintf(stderr,".\n"); (void) fflush(stderr); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % D e s t r o y E x c e p t i o n I n f o % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % DestroyExceptionInfo() deallocates memory associated with an exception. % % The format of the DestroyExceptionInfo method is: % % ExceptionInfo *DestroyExceptionInfo(ExceptionInfo *exception) % % A description of each parameter follows: % % o exception: the exception info. % */ MagickExport ExceptionInfo *DestroyExceptionInfo(ExceptionInfo *exception) { MagickBooleanType relinquish; assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); if (exception->semaphore == (SemaphoreInfo *) NULL) AcquireSemaphoreInfo(&exception->semaphore); LockSemaphoreInfo(exception->semaphore); exception->severity=UndefinedException; if (exception->exceptions != (void *) NULL) exception->exceptions=(void *) DestroyLinkedList((LinkedListInfo *) exception->exceptions,DestroyExceptionElement); relinquish=exception->relinquish; if (exception->relinquish != MagickFalse) exception->signature=(~MagickSignature); UnlockSemaphoreInfo(exception->semaphore); DestroySemaphoreInfo(&exception->semaphore); if (relinquish != MagickFalse) exception=(ExceptionInfo *) RelinquishMagickMemory(exception); return(exception); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % G e t E x c e p t i o n I n f o % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % GetExceptionInfo() initializes an exception to default values. % % The format of the GetExceptionInfo method is: % % GetExceptionInfo(ExceptionInfo *exception) % % A description of each parameter follows: % % o exception: the exception info. % */ MagickExport void GetExceptionInfo(ExceptionInfo *exception) { assert(exception != (ExceptionInfo *) NULL); (void) ResetMagickMemory(exception,0,sizeof(*exception)); exception->severity=UndefinedException; exception->exceptions=(void *) NewLinkedList(0); exception->semaphore=AllocateSemaphoreInfo(); exception->signature=MagickSignature; } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % G e t E x c e p t i o n M e s s a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % GetExceptionMessage() returns the error message defined by the specified % error code. % % The format of the GetExceptionMessage method is: % % char *GetExceptionMessage(const int error) % % A description of each parameter follows: % % o error: the error code. % */ MagickExport char *GetExceptionMessage(const int error) { char exception[MaxTextExtent]; *exception='\0'; #if defined(MAGICKCORE_HAVE_STRERROR_R) (void) strerror_r(error,exception,sizeof(exception)); #else (void) CopyMagickString(exception,strerror(error),sizeof(exception)); #endif return(ConstantString(exception)); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % G e t L o c a l e E x c e p t i o n M e s s a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % GetLocaleExceptionMessage() converts a enumerated exception severity and tag % to a message in the current locale. % % The format of the GetLocaleExceptionMessage method is: % % const char *GetLocaleExceptionMessage(const ExceptionType severity, % const char *tag) % % A description of each parameter follows: % % o severity: the severity of the exception. % % o tag: the message tag. % */ static const char *ExceptionSeverityToTag(const ExceptionType severity) { switch (severity) { case ResourceLimitWarning: return("Resource/Limit/Warning/"); case TypeWarning: return("Type/Warning/"); case OptionWarning: return("Option/Warning/"); case DelegateWarning: return("Delegate/Warning/"); case MissingDelegateWarning: return("Missing/Delegate/Warning/"); case CorruptImageWarning: return("Corrupt/Image/Warning/"); case FileOpenWarning: return("File/Open/Warning/"); case BlobWarning: return("Blob/Warning/"); case StreamWarning: return("Stream/Warning/"); case CacheWarning: return("Cache/Warning/"); case CoderWarning: return("Coder/Warning/"); case FilterWarning: return("Filter/Warning/"); case ModuleWarning: return("Module/Warning/"); case DrawWarning: return("Draw/Warning/"); case ImageWarning: return("Image/Warning/"); case WandWarning: return("Wand/Warning/"); case XServerWarning: return("XServer/Warning/"); case MonitorWarning: return("Monitor/Warning/"); case RegistryWarning: return("Registry/Warning/"); case ConfigureWarning: return("Configure/Warning/"); case PolicyWarning: return("Policy/Warning/"); case ResourceLimitError: return("Resource/Limit/Error/"); case TypeError: return("Type/Error/"); case OptionError: return("Option/Error/"); case DelegateError: return("Delegate/Error/"); case MissingDelegateError: return("Missing/Delegate/Error/"); case CorruptImageError: return("Corrupt/Image/Error/"); case FileOpenError: return("File/Open/Error/"); case BlobError: return("Blob/Error/"); case StreamError: return("Stream/Error/"); case CacheError: return("Cache/Error/"); case CoderError: return("Coder/Error/"); case FilterError: return("Filter/Error/"); case ModuleError: return("Module/Error/"); case DrawError: return("Draw/Error/"); case ImageError: return("Image/Error/"); case WandError: return("Wand/Error/"); case XServerError: return("XServer/Error/"); case MonitorError: return("Monitor/Error/"); case RegistryError: return("Registry/Error/"); case ConfigureError: return("Configure/Error/"); case PolicyError: return("Policy/Error/"); case ResourceLimitFatalError: return("Resource/Limit/FatalError/"); case TypeFatalError: return("Type/FatalError/"); case OptionFatalError: return("Option/FatalError/"); case DelegateFatalError: return("Delegate/FatalError/"); case MissingDelegateFatalError: return("Missing/Delegate/FatalError/"); case CorruptImageFatalError: return("Corrupt/Image/FatalError/"); case FileOpenFatalError: return("File/Open/FatalError/"); case BlobFatalError: return("Blob/FatalError/"); case StreamFatalError: return("Stream/FatalError/"); case CacheFatalError: return("Cache/FatalError/"); case CoderFatalError: return("Coder/FatalError/"); case FilterFatalError: return("Filter/FatalError/"); case ModuleFatalError: return("Module/FatalError/"); case DrawFatalError: return("Draw/FatalError/"); case ImageFatalError: return("Image/FatalError/"); case WandFatalError: return("Wand/FatalError/"); case XServerFatalError: return("XServer/FatalError/"); case MonitorFatalError: return("Monitor/FatalError/"); case RegistryFatalError: return("Registry/FatalError/"); case ConfigureFatalError: return("Configure/FatalError/"); case PolicyFatalError: return("Policy/FatalError/"); default: break; } return(""); } MagickExport const char *GetLocaleExceptionMessage(const ExceptionType severity, const char *tag) { char message[MaxTextExtent]; const char *locale_message; assert(tag != (const char *) NULL); (void) FormatMagickString(message,MaxTextExtent,"Exception/%s%s", ExceptionSeverityToTag(severity),tag); locale_message=GetLocaleMessage(message); if (locale_message == (const char *) NULL) return(tag); if (locale_message == message) return(tag); return(locale_message); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % I n h e r i t E x c e p t i o n % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % InheritException() inherits an exception from a related exception. % % The format of the InheritException method is: % % InheritException(ExceptionInfo *exception,const ExceptionInfo *relative) % % A description of each parameter follows: % % o exception: the exception info. % % o relative: the related exception info. % */ MagickExport void InheritException(ExceptionInfo *exception, const ExceptionInfo *relative) { register const ExceptionInfo *p; assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); assert(relative != (ExceptionInfo *) NULL); assert(relative->signature == MagickSignature); if (relative->exceptions == (void *) NULL) return; LockSemaphoreInfo(exception->semaphore); ResetLinkedListIterator((LinkedListInfo *) relative->exceptions); p=(const ExceptionInfo *) GetNextValueInLinkedList((LinkedListInfo *) relative->exceptions); while (p != (const ExceptionInfo *) NULL) { (void) ThrowException(exception,p->severity,p->reason,p->description); p=(const ExceptionInfo *) GetNextValueInLinkedList((LinkedListInfo *) relative->exceptions); } UnlockSemaphoreInfo(exception->semaphore); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % M a g i c k E r r o r % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % MagickError() calls the exception handler methods with an error reason. % % The format of the MagickError method is: % % void MagickError(const ExceptionType error,const char *reason, % const char *description) % % A description of each parameter follows: % % o exception: Specifies the numeric error category. % % o reason: Specifies the reason to display before terminating the % program. % % o description: Specifies any description to the reason. % */ MagickExport void MagickError(const ExceptionType error,const char *reason, const char *description) { if (error_handler != (ErrorHandler) NULL) (*error_handler)(error,reason,description); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % M a g i c k F a t al E r r o r % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % MagickFatalError() calls the fatal exception handler methods with an error % reason. % % The format of the MagickError method is: % % void MagickFatalError(const ExceptionType error,const char *reason, % const char *description) % % A description of each parameter follows: % % o exception: Specifies the numeric error category. % % o reason: Specifies the reason to display before terminating the % program. % % o description: Specifies any description to the reason. % */ MagickExport void MagickFatalError(const ExceptionType error,const char *reason, const char *description) { if (fatal_error_handler != (ErrorHandler) NULL) (*fatal_error_handler)(error,reason,description); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % M a g i c k W a r n i n g % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % MagickWarning() calls the warning handler methods with a warning reason. % % The format of the MagickWarning method is: % % void MagickWarning(const ExceptionType warning,const char *reason, % const char *description) % % A description of each parameter follows: % % o warning: the warning severity. % % o reason: Define the reason for the warning. % % o description: Describe the warning. % */ MagickExport void MagickWarning(const ExceptionType warning,const char *reason, const char *description) { if (warning_handler != (WarningHandler) NULL) (*warning_handler)(warning,reason,description); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % S e t E r r o r H a n d l e r % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % SetErrorHandler() sets the exception handler to the specified method % and returns the previous exception handler. % % The format of the SetErrorHandler method is: % % ErrorHandler SetErrorHandler(ErrorHandler handler) % % A description of each parameter follows: % % o handler: the method to handle errors. % */ MagickExport ErrorHandler SetErrorHandler(ErrorHandler handler) { ErrorHandler previous_handler; previous_handler=error_handler; error_handler=handler; return(previous_handler); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % S e t F a t a l E r r o r H a n d l e r % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % SetFatalErrorHandler() sets the fatal exception handler to the specified % method and returns the previous fatal exception handler. % % The format of the SetErrorHandler method is: % % ErrorHandler SetErrorHandler(ErrorHandler handler) % % A description of each parameter follows: % % o handler: the method to handle errors. % */ MagickExport FatalErrorHandler SetFatalErrorHandler(FatalErrorHandler handler) { FatalErrorHandler previous_handler; previous_handler=fatal_error_handler; fatal_error_handler=handler; return(previous_handler); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % S e t W a r n i n g H a n d l e r % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % SetWarningHandler() sets the warning handler to the specified method % and returns the previous warning handler. % % The format of the SetWarningHandler method is: % % ErrorHandler SetWarningHandler(ErrorHandler handler) % % A description of each parameter follows: % % o handler: the method to handle warnings. % */ MagickExport WarningHandler SetWarningHandler(WarningHandler handler) { WarningHandler previous_handler; previous_handler=warning_handler; warning_handler=handler; return(previous_handler); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % T h r o w E x c e p t i o n % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ThrowException() throws an exception with the specified severity code, % reason, and optional description. % % The format of the ThrowException method is: % % MagickBooleanType ThrowException(ExceptionInfo *exception, % const ExceptionType severity,const char *reason, % const char *description) % % A description of each parameter follows: % % o exception: the exception info. % % o severity: the severity of the exception. % % o reason: the reason for the exception. % % o description: the exception description. % */ MagickExport MagickBooleanType ThrowException(ExceptionInfo *exception, const ExceptionType severity,const char *reason,const char *description) { register ExceptionInfo *p; assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); p=(ExceptionInfo *) GetLastValueInLinkedList((LinkedListInfo *) exception->exceptions); if ((p != (ExceptionInfo *) NULL) && (p->severity == severity) && (LocaleCompare(exception->reason,reason) == 0) && (LocaleCompare(exception->description,description) == 0)) return(MagickTrue); p=(ExceptionInfo *) AcquireAlignedMemory(1,sizeof(*p)); if (p == (ExceptionInfo *) NULL) ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed"); (void) ResetMagickMemory(p,0,sizeof(*p)); p->severity=severity; if (reason != (const char *) NULL) p->reason=ConstantString(reason); if (description != (const char *) NULL) p->description=ConstantString(description); p->signature=MagickSignature; (void) AppendValueToLinkedList((LinkedListInfo *) exception->exceptions,p); exception->severity=p->severity; exception->reason=p->reason; exception->description=p->description; return(MagickTrue); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % T h r o w M a g i c k E x c e p t i o n % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ThrowMagickException logs an exception as determined by the log configuration % file. If an error occurs, MagickFalse is returned otherwise MagickTrue. % % The format of the ThrowMagickException method is: % % MagickBooleanType ThrowFileException(ExceptionInfo *exception, % const char *module,const char *function,const unsigned long line, % const ExceptionType severity,const char *tag,const char *format,...) % % A description of each parameter follows: % % o exception: the exception info. % % o filename: the source module filename. % % o function: the function name. % % o line: the line number of the source module. % % o severity: Specifies the numeric error category. % % o tag: the locale tag. % % o format: the output format. % */ MagickExport MagickBooleanType ThrowMagickExceptionList( ExceptionInfo *exception,const char *module,const char *function, const unsigned long line,const ExceptionType severity,const char *tag, const char *format,va_list operands) { char message[MaxTextExtent], path[MaxTextExtent], reason[MaxTextExtent]; const char *locale, *type; int n; MagickBooleanType status; size_t length; assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); locale=GetLocaleExceptionMessage(severity,tag); (void) CopyMagickString(reason,locale,MaxTextExtent); (void) ConcatenateMagickString(reason," ",MaxTextExtent); length=strlen(reason); #if defined(MAGICKCORE_HAVE_VSNPRINTF) n=vsnprintf(reason+length,MaxTextExtent-length,format,operands); #else n=vsprintf(reason+length,format,operands); #endif if (n < 0) reason[MaxTextExtent-1]='\0'; status=LogMagickEvent(ExceptionEvent,module,function,line,"%s",reason); GetPathComponent(module,TailPath,path); type="undefined"; if ((severity >= WarningException) && (severity < ErrorException)) type="warning"; if ((severity >= ErrorException) && (severity < FatalErrorException)) type="error"; if (severity >= FatalErrorException) type="fatal"; (void) FormatMagickString(message,MaxTextExtent,"%s @ %s/%s/%s/%ld",reason, type,path,function,line); (void) ThrowException(exception,severity,message,(char *) NULL); return(status); } MagickExport MagickBooleanType ThrowMagickException(ExceptionInfo *exception, const char *module,const char *function,const unsigned long line, const ExceptionType severity,const char *tag,const char *format,...) { MagickBooleanType status; va_list operands; va_start(operands,format); status=ThrowMagickExceptionList(exception,module,function,line,severity,tag, format,operands); va_end(operands); return(status); }