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11 <title>ImageMagick: MagickCore, C API for ImageMagick: Dealing with Exceptions</title>
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151 <p class="navigation-index">[<a href="#AcquireExceptionInfo">AcquireExceptionInfo</a> • <a href="#ClearMagickException">ClearMagickException</a> • <a href="#CatchException">CatchException</a> • <a href="#DestroyExceptionInfo">DestroyExceptionInfo</a> • <a href="#GetExceptionInfo">GetExceptionInfo</a> • <a href="#GetExceptionMessage">GetExceptionMessage</a> • <a href="#GetLocaleExceptionMessage">GetLocaleExceptionMessage</a> • <a href="#InheritException">InheritException</a> • <a href="#MagickError">MagickError</a> • <a href="#MagickFatalError">MagickFatalError</a> • <a href="#MagickWarning">MagickWarning</a> • <a href="#SetErrorHandler">SetErrorHandler</a> • <a href="#SetFatalErrorHandler">SetFatalErrorHandler</a> • <a href="#SetWarningHandler">SetWarningHandler</a> • <a href="#ThrowException">ThrowException</a>]</p>
153 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
154 _8c.html" target="source" name="AcquireExceptionInfo">AcquireExceptionInfo</a></h2>
155 <div class="doc-section">
157 <p>AcquireExceptionInfo() allocates the ExceptionInfo structure.</p></ol>
159 <p>The format of the AcquireExceptionInfo method is:</p>
162 ExceptionInfo *AcquireExceptionInfo(void)
166 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
167 _8c.html" target="source" name="ClearMagickException">ClearMagickException</a></h2>
168 <div class="doc-section">
170 <p>ClearMagickException() clears any exception that may not have been caught yet.</p></ol>
172 <p>The format of the ClearMagickException method is:</p>
175 ClearMagickException(ExceptionInfo *exception)
178 <p>A description of each parameter follows:</p></ol>
181 <ol><p>the exception info.</p></ol>
184 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
185 _8c.html" target="source" name="CatchException">CatchException</a></h2>
186 <div class="doc-section">
188 <p>CatchException() returns if no exceptions is found otherwise it reports the exception as a warning, error, or fatal depending on the severity.</p></ol>
190 <p>The format of the CatchException method is:</p>
193 CatchException(ExceptionInfo *exception)
196 <p>A description of each parameter follows:</p></ol>
199 <ol><p>the exception info.</p></ol>
202 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
203 _8c.html" target="source" name="DestroyExceptionInfo">DestroyExceptionInfo</a></h2>
204 <div class="doc-section">
206 <p>DestroyExceptionInfo() deallocates memory associated with an exception.</p></ol>
208 <p>The format of the DestroyExceptionInfo method is:</p>
211 ExceptionInfo *DestroyExceptionInfo(ExceptionInfo *exception)
214 <p>A description of each parameter follows:</p></ol>
217 <ol><p>the exception info.</p></ol>
220 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
221 _8c.html" target="source" name="GetExceptionInfo">GetExceptionInfo</a></h2>
222 <div class="doc-section">
224 <p>GetExceptionInfo() initializes an exception to default values.</p></ol>
226 <p>The format of the GetExceptionInfo method is:</p>
229 GetExceptionInfo(ExceptionInfo *exception)
232 <p>A description of each parameter follows:</p></ol>
235 <ol><p>the exception info.</p></ol>
238 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
239 _8c.html" target="source" name="GetExceptionMessage">GetExceptionMessage</a></h2>
240 <div class="doc-section">
242 <p>GetExceptionMessage() returns the error message defined by the specified error code.</p></ol>
244 <p>The format of the GetExceptionMessage method is:</p>
247 char *GetExceptionMessage(const int error)
250 <p>A description of each parameter follows:</p></ol>
253 <ol><p>the error code.</p></ol>
256 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
257 _8c.html" target="source" name="GetLocaleExceptionMessage">GetLocaleExceptionMessage</a></h2>
258 <div class="doc-section">
260 <p>GetLocaleExceptionMessage() converts a enumerated exception severity and tag to a message in the current locale.</p></ol>
262 <p>The format of the GetLocaleExceptionMessage method is:</p>
265 const char *GetLocaleExceptionMessage(const ExceptionType severity,
269 <p>A description of each parameter follows:</p></ol>
272 <ol><p>the severity of the exception.</p></ol>
275 <ol><p>the message tag.</p></ol>
278 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
279 _8c.html" target="source" name="InheritException">InheritException</a></h2>
280 <div class="doc-section">
282 <p>InheritException() inherits an exception from a related exception.</p></ol>
284 <p>The format of the InheritException method is:</p>
287 InheritException(ExceptionInfo *exception,const ExceptionInfo *relative)
290 <p>A description of each parameter follows:</p></ol>
293 <ol><p>the exception info.</p></ol>
296 <ol><p>the related exception info.</p></ol>
299 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
300 _8c.html" target="source" name="MagickError">MagickError</a></h2>
301 <div class="doc-section">
303 <p>MagickError() calls the exception handler methods with an error reason.</p></ol>
305 <p>The format of the MagickError method is:</p>
308 void MagickError(const ExceptionType error,const char *reason,
309 const char *description)
312 <p>A description of each parameter follows:</p></ol>
315 <ol><p>Specifies the numeric error category.</p></ol>
318 <ol><p>Specifies the reason to display before terminating the program.</p></ol>
321 <ol><p>Specifies any description to the reason.</p></ol>
324 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
325 _8c.html" target="source" name="MagickFatalError">MagickFatalError</a></h2>
326 <div class="doc-section">
328 <p>MagickFatalError() calls the fatal exception handler methods with an error reason.</p></ol>
330 <p>The format of the MagickError method is:</p>
333 void MagickFatalError(const ExceptionType error,const char *reason,
334 const char *description)
337 <p>A description of each parameter follows:</p></ol>
340 <ol><p>Specifies the numeric error category.</p></ol>
343 <ol><p>Specifies the reason to display before terminating the program.</p></ol>
346 <ol><p>Specifies any description to the reason.</p></ol>
349 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
350 _8c.html" target="source" name="MagickWarning">MagickWarning</a></h2>
351 <div class="doc-section">
353 <p>MagickWarning() calls the warning handler methods with a warning reason.</p></ol>
355 <p>The format of the MagickWarning method is:</p>
358 void MagickWarning(const ExceptionType warning,const char *reason,
359 const char *description)
362 <p>A description of each parameter follows:</p></ol>
365 <ol><p>the warning severity.</p></ol>
368 <ol><p>Define the reason for the warning.</p></ol>
371 <ol><p>Describe the warning.</p></ol>
374 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
375 _8c.html" target="source" name="SetErrorHandler">SetErrorHandler</a></h2>
376 <div class="doc-section">
378 <p>SetErrorHandler() sets the exception handler to the specified method and returns the previous exception handler.</p></ol>
380 <p>The format of the SetErrorHandler method is:</p>
383 ErrorHandler SetErrorHandler(ErrorHandler handler)
386 <p>A description of each parameter follows:</p></ol>
389 <ol><p>the method to handle errors.</p></ol>
392 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
393 _8c.html" target="source" name="SetFatalErrorHandler">SetFatalErrorHandler</a></h2>
394 <div class="doc-section">
396 <p>SetFatalErrorHandler() sets the fatal exception handler to the specified method and returns the previous fatal exception handler.</p></ol>
398 <p>The format of the SetErrorHandler method is:</p>
401 ErrorHandler SetErrorHandler(ErrorHandler handler)
404 <p>A description of each parameter follows:</p></ol>
407 <ol><p>the method to handle errors.</p></ol>
410 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
411 _8c.html" target="source" name="SetWarningHandler">SetWarningHandler</a></h2>
412 <div class="doc-section">
414 <p>SetWarningHandler() sets the warning handler to the specified method and returns the previous warning handler.</p></ol>
416 <p>The format of the SetWarningHandler method is:</p>
419 ErrorHandler SetWarningHandler(ErrorHandler handler)
422 <p>A description of each parameter follows:</p></ol>
425 <ol><p>the method to handle warnings.</p></ol>
428 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
429 _8c.html" target="source" name="ThrowException">ThrowException</a></h2>
430 <div class="doc-section">
432 <p>ThrowException() throws an exception with the specified severity code, reason, and optional description.</p></ol>
434 <p>The format of the ThrowException method is:</p>
437 MagickBooleanType ThrowException(ExceptionInfo *exception,
438 const ExceptionType severity,const char *reason,
439 const char *description)
442 <p>A description of each parameter follows:</p></ol>
445 <ol><p>the exception info.</p></ol>
448 <ol><p>the severity of the exception.</p></ol>
451 <ol><p>the reason for the exception.</p></ol>
454 <ol><p>the exception description.</p></ol>
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