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12 <title>ImageMagick: MagickCore, C API for ImageMagick: Dealing with Exceptions</title>
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155 <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>
157 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
158 _8c.html" target="source" name="AcquireExceptionInfo">AcquireExceptionInfo</a></h2>
159 <div class="doc-section">
161 <p>AcquireExceptionInfo() allocates the ExceptionInfo structure.</p></ol>
163 <p>The format of the AcquireExceptionInfo method is:</p>
166 ExceptionInfo *AcquireExceptionInfo(void)
170 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
171 _8c.html" target="source" name="ClearMagickException">ClearMagickException</a></h2>
172 <div class="doc-section">
174 <p>ClearMagickException() clears any exception that may not have been caught yet.</p></ol>
176 <p>The format of the ClearMagickException method is:</p>
179 ClearMagickException(ExceptionInfo *exception)
182 <p>A description of each parameter follows:</p></ol>
185 <ol><p>the exception info.</p></ol>
188 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
189 _8c.html" target="source" name="CatchException">CatchException</a></h2>
190 <div class="doc-section">
192 <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>
194 <p>The format of the CatchException method is:</p>
197 CatchException(ExceptionInfo *exception)
200 <p>A description of each parameter follows:</p></ol>
203 <ol><p>the exception info.</p></ol>
206 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
207 _8c.html" target="source" name="DestroyExceptionInfo">DestroyExceptionInfo</a></h2>
208 <div class="doc-section">
210 <p>DestroyExceptionInfo() deallocates memory associated with an exception.</p></ol>
212 <p>The format of the DestroyExceptionInfo method is:</p>
215 ExceptionInfo *DestroyExceptionInfo(ExceptionInfo *exception)
218 <p>A description of each parameter follows:</p></ol>
221 <ol><p>the exception info.</p></ol>
224 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
225 _8c.html" target="source" name="GetExceptionInfo">GetExceptionInfo</a></h2>
226 <div class="doc-section">
228 <p>GetExceptionInfo() initializes an exception to default values.</p></ol>
230 <p>The format of the GetExceptionInfo method is:</p>
233 GetExceptionInfo(ExceptionInfo *exception)
236 <p>A description of each parameter follows:</p></ol>
239 <ol><p>the exception info.</p></ol>
242 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
243 _8c.html" target="source" name="GetExceptionMessage">GetExceptionMessage</a></h2>
244 <div class="doc-section">
246 <p>GetExceptionMessage() returns the error message defined by the specified error code.</p></ol>
248 <p>The format of the GetExceptionMessage method is:</p>
251 char *GetExceptionMessage(const int error)
254 <p>A description of each parameter follows:</p></ol>
257 <ol><p>the error code.</p></ol>
260 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
261 _8c.html" target="source" name="GetLocaleExceptionMessage">GetLocaleExceptionMessage</a></h2>
262 <div class="doc-section">
264 <p>GetLocaleExceptionMessage() converts a enumerated exception severity and tag to a message in the current locale.</p></ol>
266 <p>The format of the GetLocaleExceptionMessage method is:</p>
269 const char *GetLocaleExceptionMessage(const ExceptionType severity,
273 <p>A description of each parameter follows:</p></ol>
276 <ol><p>the severity of the exception.</p></ol>
279 <ol><p>the message tag.</p></ol>
282 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
283 _8c.html" target="source" name="InheritException">InheritException</a></h2>
284 <div class="doc-section">
286 <p>InheritException() inherits an exception from a related exception.</p></ol>
288 <p>The format of the InheritException method is:</p>
291 InheritException(ExceptionInfo *exception,const ExceptionInfo *relative)
294 <p>A description of each parameter follows:</p></ol>
297 <ol><p>the exception info.</p></ol>
300 <ol><p>the related exception info.</p></ol>
303 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
304 _8c.html" target="source" name="MagickError">MagickError</a></h2>
305 <div class="doc-section">
307 <p>MagickError() calls the exception handler methods with an error reason.</p></ol>
309 <p>The format of the MagickError method is:</p>
312 void MagickError(const ExceptionType error,const char *reason,
313 const char *description)
316 <p>A description of each parameter follows:</p></ol>
319 <ol><p>Specifies the numeric error category.</p></ol>
322 <ol><p>Specifies the reason to display before terminating the program.</p></ol>
325 <ol><p>Specifies any description to the reason.</p></ol>
328 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
329 _8c.html" target="source" name="MagickFatalError">MagickFatalError</a></h2>
330 <div class="doc-section">
332 <p>MagickFatalError() calls the fatal exception handler methods with an error reason.</p></ol>
334 <p>The format of the MagickError method is:</p>
337 void MagickFatalError(const ExceptionType error,const char *reason,
338 const char *description)
341 <p>A description of each parameter follows:</p></ol>
344 <ol><p>Specifies the numeric error category.</p></ol>
347 <ol><p>Specifies the reason to display before terminating the program.</p></ol>
350 <ol><p>Specifies any description to the reason.</p></ol>
353 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
354 _8c.html" target="source" name="MagickWarning">MagickWarning</a></h2>
355 <div class="doc-section">
357 <p>MagickWarning() calls the warning handler methods with a warning reason.</p></ol>
359 <p>The format of the MagickWarning method is:</p>
362 void MagickWarning(const ExceptionType warning,const char *reason,
363 const char *description)
366 <p>A description of each parameter follows:</p></ol>
369 <ol><p>the warning severity.</p></ol>
372 <ol><p>Define the reason for the warning.</p></ol>
375 <ol><p>Describe the warning.</p></ol>
378 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
379 _8c.html" target="source" name="SetErrorHandler">SetErrorHandler</a></h2>
380 <div class="doc-section">
382 <p>SetErrorHandler() sets the exception handler to the specified method and returns the previous exception handler.</p></ol>
384 <p>The format of the SetErrorHandler method is:</p>
387 ErrorHandler SetErrorHandler(ErrorHandler handler)
390 <p>A description of each parameter follows:</p></ol>
393 <ol><p>the method to handle errors.</p></ol>
396 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
397 _8c.html" target="source" name="SetFatalErrorHandler">SetFatalErrorHandler</a></h2>
398 <div class="doc-section">
400 <p>SetFatalErrorHandler() sets the fatal exception handler to the specified method and returns the previous fatal exception handler.</p></ol>
402 <p>The format of the SetErrorHandler method is:</p>
405 ErrorHandler SetErrorHandler(ErrorHandler handler)
408 <p>A description of each parameter follows:</p></ol>
411 <ol><p>the method to handle errors.</p></ol>
414 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
415 _8c.html" target="source" name="SetWarningHandler">SetWarningHandler</a></h2>
416 <div class="doc-section">
418 <p>SetWarningHandler() sets the warning handler to the specified method and returns the previous warning handler.</p></ol>
420 <p>The format of the SetWarningHandler method is:</p>
423 ErrorHandler SetWarningHandler(ErrorHandler handler)
426 <p>A description of each parameter follows:</p></ol>
429 <ol><p>the method to handle warnings.</p></ol>
432 <h2><a href="http://www.imagemagick.org/api/MagickCore/exception
433 _8c.html" target="source" name="ThrowException">ThrowException</a></h2>
434 <div class="doc-section">
436 <p>ThrowException() throws an exception with the specified severity code, reason, and optional description.</p></ol>
438 <p>The format of the ThrowException method is:</p>
441 MagickBooleanType ThrowException(ExceptionInfo *exception,
442 const ExceptionType severity,const char *reason,
443 const char *description)
446 <p>A description of each parameter follows:</p></ol>
449 <ol><p>the exception info.</p></ol>
452 <ol><p>the severity of the exception.</p></ol>
455 <ol><p>the reason for the exception.</p></ol>
458 <ol><p>the exception description.</p></ol>
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