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<title>ImageMagick - MagickCore, C API: Dealing with Exceptions</title>
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<p class="text-center"><a href="exception.html#AcquireExceptionInfo">AcquireExceptionInfo</a> • <a href="exception.html#ClearMagickException">ClearMagickException</a> • <a href="exception.html#CatchException">CatchException</a> • <a href="exception.html#CloneExceptionInfo">CloneExceptionInfo</a> • <a href="exception.html#DestroyExceptionInfo">DestroyExceptionInfo</a> • <a href="exception.html#GetExceptionMessage">GetExceptionMessage</a> • <a href="exception.html#GetLocaleExceptionMessage">GetLocaleExceptionMessage</a> • <a href="exception.html#InheritException">InheritException</a> • <a href="exception.html#InitializeExceptionInfo">InitializeExceptionInfo</a> • <a href="exception.html#MagickError">MagickError</a> • <a href="exception.html#MagickFatalError">MagickFatalError</a> • <a href="exception.html#MagickWarning">MagickWarning</a> • <a href="exception.html#SetErrorHandler">SetErrorHandler</a> • <a href="exception.html#SetFatalErrorHandler">SetFatalErrorHandler</a> • <a href="exception.html#SetWarningHandler">SetWarningHandler</a> • <a href="exception.html#ThrowException">ThrowException</a></p>
<h2><a href="../../api/MagickCore/exception_8c.html" id="AcquireExceptionInfo">AcquireExceptionInfo</a></h2>
<p>AcquireExceptionInfo() allocates the ExceptionInfo structure.</p>
<p>The format of the AcquireExceptionInfo method is:</p>
<pre class="text">
ExceptionInfo *AcquireExceptionInfo(void)
</pre>
<h2><a href="../../api/MagickCore/exception_8c.html" id="ClearMagickException">ClearMagickException</a></h2>
<p>ClearMagickException() clears any exception that may not have been caught yet.</p>
<p>The format of the ClearMagickException method is:</p>
<pre class="text">
ClearMagickException(ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>exception</dt>
<dd>the exception info. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="CatchException">CatchException</a></h2>
<p>CatchException() returns if no exceptions is found otherwise it reports the exception as a warning, error, or fatal depending on the severity.</p>
<p>The format of the CatchException method is:</p>
<pre class="text">
CatchException(ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>exception</dt>
<dd>the exception info. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="CloneExceptionInfo">CloneExceptionInfo</a></h2>
<p>CloneExceptionInfo() clones the ExceptionInfo structure.</p>
<p>The format of the CloneExceptionInfo method is:</p>
<pre class="text">
ExceptionInfo *CloneException(ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>exception</dt>
<dd>the exception info. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="DestroyExceptionInfo">DestroyExceptionInfo</a></h2>
<p>DestroyExceptionInfo() deallocates memory associated with an exception.</p>
<p>The format of the DestroyExceptionInfo method is:</p>
<pre class="text">
ExceptionInfo *DestroyExceptionInfo(ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>exception</dt>
<dd>the exception info. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="GetExceptionMessage">GetExceptionMessage</a></h2>
<p>GetExceptionMessage() returns the error message defined by the specified error code.</p>
<p>The format of the GetExceptionMessage method is:</p>
<pre class="text">
char *GetExceptionMessage(const int error)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>error</dt>
<dd>the error code. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="GetLocaleExceptionMessage">GetLocaleExceptionMessage</a></h2>
<p>GetLocaleExceptionMessage() converts a enumerated exception severity and tag to a message in the current locale.</p>
<p>The format of the GetLocaleExceptionMessage method is:</p>
<pre class="text">
const char *GetLocaleExceptionMessage(const ExceptionType severity,
const char *tag)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>severity</dt>
<dd>the severity of the exception. </dd>
<dd> </dd>
<dt>tag</dt>
<dd>the message tag. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="InheritException">InheritException</a></h2>
<p>InheritException() inherits an exception from a related exception.</p>
<p>The format of the InheritException method is:</p>
<pre class="text">
InheritException(ExceptionInfo *exception,const ExceptionInfo *relative)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>exception</dt>
<dd>the exception info. </dd>
<dd> </dd>
<dt>relative</dt>
<dd>the related exception info. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="InitializeExceptionInfo">InitializeExceptionInfo</a></h2>
<p>InitializeExceptionInfo() initializes an exception to default values.</p>
<p>The format of the InitializeExceptionInfo method is:</p>
<pre class="text">
InitializeExceptionInfo(ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>exception</dt>
<dd>the exception info. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="MagickError">MagickError</a></h2>
<p>MagickError() calls the exception handler methods with an error reason.</p>
<p>The format of the MagickError method is:</p>
<pre class="text">
void MagickError(const ExceptionType error,const char *reason,
const char *description)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>exception</dt>
<dd>Specifies the numeric error category. </dd>
<dd> </dd>
<dt>reason</dt>
<dd>Specifies the reason to display before terminating the program. </dd>
<dd> </dd>
<dt>description</dt>
<dd>Specifies any description to the reason. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="MagickFatalError">MagickFatalError</a></h2>
<p>MagickFatalError() calls the fatal exception handler methods with an error reason.</p>
<p>The format of the MagickError method is:</p>
<pre class="text">
void MagickFatalError(const ExceptionType error,const char *reason,
const char *description)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>exception</dt>
<dd>Specifies the numeric error category. </dd>
<dd> </dd>
<dt>reason</dt>
<dd>Specifies the reason to display before terminating the program. </dd>
<dd> </dd>
<dt>description</dt>
<dd>Specifies any description to the reason. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="MagickWarning">MagickWarning</a></h2>
<p>MagickWarning() calls the warning handler methods with a warning reason.</p>
<p>The format of the MagickWarning method is:</p>
<pre class="text">
void MagickWarning(const ExceptionType warning,const char *reason,
const char *description)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>warning</dt>
<dd>the warning severity. </dd>
<dd> </dd>
<dt>reason</dt>
<dd>Define the reason for the warning. </dd>
<dd> </dd>
<dt>description</dt>
<dd>Describe the warning. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="SetErrorHandler">SetErrorHandler</a></h2>
<p>SetErrorHandler() sets the exception handler to the specified method and returns the previous exception handler.</p>
<p>The format of the SetErrorHandler method is:</p>
<pre class="text">
ErrorHandler SetErrorHandler(ErrorHandler handler)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>handler</dt>
<dd>the method to handle errors. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="SetFatalErrorHandler">SetFatalErrorHandler</a></h2>
<p>SetFatalErrorHandler() sets the fatal exception handler to the specified method and returns the previous fatal exception handler.</p>
<p>The format of the SetErrorHandler method is:</p>
<pre class="text">
ErrorHandler SetErrorHandler(ErrorHandler handler)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>handler</dt>
<dd>the method to handle errors. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="SetWarningHandler">SetWarningHandler</a></h2>
<p>SetWarningHandler() sets the warning handler to the specified method and returns the previous warning handler.</p>
<p>The format of the SetWarningHandler method is:</p>
<pre class="text">
ErrorHandler SetWarningHandler(ErrorHandler handler)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>handler</dt>
<dd>the method to handle warnings. </dd>
<dd> </dd>
</dl>
<h2><a href="../../api/MagickCore/exception_8c.html" id="ThrowException">ThrowException</a></h2>
<p>ThrowException() throws an exception with the specified severity code, reason, and optional description.</p>
<p>The format of the ThrowException method is:</p>
<pre class="text">
MagickBooleanType ThrowException(ExceptionInfo *exception,
const ExceptionType severity,const char *reason,
const char *description)
</pre>
<p>A description of each parameter follows:</p>
<dd>
</dd>
<dd> </dd>
<dl class="dl-horizontal">
<dt>exception</dt>
<dd>the exception info. </dd>
<dd> </dd>
<dt>severity</dt>
<dd>the severity of the exception. </dd>
<dd> </dd>
<dt>reason</dt>
<dd>the reason for the exception. </dd>
<dd> </dd>
<dt>description</dt>
<dd>the exception description. </dd>
<dd> </dd>
</dl>
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