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12 <title>ImageMagick: MagickCore, C API for ImageMagick: Dealing with Exceptions</title>
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158 <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>
160 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
161 _8c.html" target="source" name="AcquireExceptionInfo">AcquireExceptionInfo</a></h2>
162 <div class="doc-section">
164 <p>AcquireExceptionInfo() allocates the ExceptionInfo structure.</p></ol>
166 <p>The format of the AcquireExceptionInfo method is:</p>
169 ExceptionInfo *AcquireExceptionInfo(void)
173 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
174 _8c.html" target="source" name="ClearMagickException">ClearMagickException</a></h2>
175 <div class="doc-section">
177 <p>ClearMagickException() clears any exception that may not have been caught yet.</p></ol>
179 <p>The format of the ClearMagickException method is:</p>
182 ClearMagickException(ExceptionInfo *exception)
185 <p>A description of each parameter follows:</p></ol>
188 <ol><p>the exception info.</p></ol>
191 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
192 _8c.html" target="source" name="CatchException">CatchException</a></h2>
193 <div class="doc-section">
195 <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>
197 <p>The format of the CatchException method is:</p>
200 CatchException(ExceptionInfo *exception)
203 <p>A description of each parameter follows:</p></ol>
206 <ol><p>the exception info.</p></ol>
209 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
210 _8c.html" target="source" name="DestroyExceptionInfo">DestroyExceptionInfo</a></h2>
211 <div class="doc-section">
213 <p>DestroyExceptionInfo() deallocates memory associated with an exception.</p></ol>
215 <p>The format of the DestroyExceptionInfo method is:</p>
218 ExceptionInfo *DestroyExceptionInfo(ExceptionInfo *exception)
221 <p>A description of each parameter follows:</p></ol>
224 <ol><p>the exception info.</p></ol>
227 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
228 _8c.html" target="source" name="GetExceptionInfo">GetExceptionInfo</a></h2>
229 <div class="doc-section">
231 <p>GetExceptionInfo() initializes an exception to default values.</p></ol>
233 <p>The format of the GetExceptionInfo method is:</p>
236 GetExceptionInfo(ExceptionInfo *exception)
239 <p>A description of each parameter follows:</p></ol>
242 <ol><p>the exception info.</p></ol>
245 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
246 _8c.html" target="source" name="GetExceptionMessage">GetExceptionMessage</a></h2>
247 <div class="doc-section">
249 <p>GetExceptionMessage() returns the error message defined by the specified error code.</p></ol>
251 <p>The format of the GetExceptionMessage method is:</p>
254 char *GetExceptionMessage(const int error)
257 <p>A description of each parameter follows:</p></ol>
260 <ol><p>the error code.</p></ol>
263 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
264 _8c.html" target="source" name="GetLocaleExceptionMessage">GetLocaleExceptionMessage</a></h2>
265 <div class="doc-section">
267 <p>GetLocaleExceptionMessage() converts a enumerated exception severity and tag to a message in the current locale.</p></ol>
269 <p>The format of the GetLocaleExceptionMessage method is:</p>
272 const char *GetLocaleExceptionMessage(const ExceptionType severity,
276 <p>A description of each parameter follows:</p></ol>
279 <ol><p>the severity of the exception.</p></ol>
282 <ol><p>the message tag.</p></ol>
285 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
286 _8c.html" target="source" name="InheritException">InheritException</a></h2>
287 <div class="doc-section">
289 <p>InheritException() inherits an exception from a related exception.</p></ol>
291 <p>The format of the InheritException method is:</p>
294 InheritException(ExceptionInfo *exception,const ExceptionInfo *relative)
297 <p>A description of each parameter follows:</p></ol>
300 <ol><p>the exception info.</p></ol>
303 <ol><p>the related exception info.</p></ol>
306 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
307 _8c.html" target="source" name="MagickError">MagickError</a></h2>
308 <div class="doc-section">
310 <p>MagickError() calls the exception handler methods with an error reason.</p></ol>
312 <p>The format of the MagickError method is:</p>
315 void MagickError(const ExceptionType error,const char *reason,
316 const char *description)
319 <p>A description of each parameter follows:</p></ol>
322 <ol><p>Specifies the numeric error category.</p></ol>
325 <ol><p>Specifies the reason to display before terminating the program.</p></ol>
328 <ol><p>Specifies any description to the reason.</p></ol>
331 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
332 _8c.html" target="source" name="MagickFatalError">MagickFatalError</a></h2>
333 <div class="doc-section">
335 <p>MagickFatalError() calls the fatal exception handler methods with an error reason.</p></ol>
337 <p>The format of the MagickError method is:</p>
340 void MagickFatalError(const ExceptionType error,const char *reason,
341 const char *description)
344 <p>A description of each parameter follows:</p></ol>
347 <ol><p>Specifies the numeric error category.</p></ol>
350 <ol><p>Specifies the reason to display before terminating the program.</p></ol>
353 <ol><p>Specifies any description to the reason.</p></ol>
356 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
357 _8c.html" target="source" name="MagickWarning">MagickWarning</a></h2>
358 <div class="doc-section">
360 <p>MagickWarning() calls the warning handler methods with a warning reason.</p></ol>
362 <p>The format of the MagickWarning method is:</p>
365 void MagickWarning(const ExceptionType warning,const char *reason,
366 const char *description)
369 <p>A description of each parameter follows:</p></ol>
372 <ol><p>the warning severity.</p></ol>
375 <ol><p>Define the reason for the warning.</p></ol>
378 <ol><p>Describe the warning.</p></ol>
381 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
382 _8c.html" target="source" name="SetErrorHandler">SetErrorHandler</a></h2>
383 <div class="doc-section">
385 <p>SetErrorHandler() sets the exception handler to the specified method and returns the previous exception handler.</p></ol>
387 <p>The format of the SetErrorHandler method is:</p>
390 ErrorHandler SetErrorHandler(ErrorHandler handler)
393 <p>A description of each parameter follows:</p></ol>
396 <ol><p>the method to handle errors.</p></ol>
399 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
400 _8c.html" target="source" name="SetFatalErrorHandler">SetFatalErrorHandler</a></h2>
401 <div class="doc-section">
403 <p>SetFatalErrorHandler() sets the fatal exception handler to the specified method and returns the previous fatal exception handler.</p></ol>
405 <p>The format of the SetErrorHandler method is:</p>
408 ErrorHandler SetErrorHandler(ErrorHandler handler)
411 <p>A description of each parameter follows:</p></ol>
414 <ol><p>the method to handle errors.</p></ol>
417 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
418 _8c.html" target="source" name="SetWarningHandler">SetWarningHandler</a></h2>
419 <div class="doc-section">
421 <p>SetWarningHandler() sets the warning handler to the specified method and returns the previous warning handler.</p></ol>
423 <p>The format of the SetWarningHandler method is:</p>
426 ErrorHandler SetWarningHandler(ErrorHandler handler)
429 <p>A description of each parameter follows:</p></ol>
432 <ol><p>the method to handle warnings.</p></ol>
435 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
436 _8c.html" target="source" name="ThrowException">ThrowException</a></h2>
437 <div class="doc-section">
439 <p>ThrowException() throws an exception with the specified severity code, reason, and optional description.</p></ol>
441 <p>The format of the ThrowException method is:</p>
444 MagickBooleanType ThrowException(ExceptionInfo *exception,
445 const ExceptionType severity,const char *reason,
446 const char *description)
449 <p>A description of each parameter follows:</p></ol>
452 <ol><p>the exception info.</p></ol>
455 <ol><p>the severity of the exception.</p></ol>
458 <ol><p>the reason for the exception.</p></ol>
461 <ol><p>the exception description.</p></ol>
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