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errorCallBack - handle error output in OpenMaple
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Calling Sequence
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errorCallBack(data, offset, msg)
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Parameters
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data
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user_data pointer passed to StartMaple (void*)
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offset
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integer
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msg
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error message (char*)
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Description
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The errorCallBack function is called when an error occurs during parsing or processing.
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The prototype for the function you can assign to the entry in the MCallBackVector must look like the following.
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void M_DECL errorCallBack( void *data, M_INT offset, char *msg );
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The offset parameter indicates the location of a parsing error. If offset >= 0, the error was detected at the specified offset in the string passed to EvalMapleStatement. If offset < 0, the error is not a parsing error; it is a computation error.
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The msg parameter contains the text of the error message.
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The data parameter contains the same data as passed to StartMaple in the user_data parameter.
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If an errorCallBack function is not specified, error messages are sent to the textCallBack function, with the MAPLE_TEXT_ERROR tag.
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Source code for an errorCallBack example is provided in the samples/OpenMaple/HelpExamples subdirectory of your Maple installation.
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See Also
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callBackCallBack, CustomWrapper, OpenMaple, OpenMaple/C/API, OpenMaple/C/Examples, queryInterrupt, readLineCallBack, redirectCallBack, StartMaple, statusCallBack, streamCallBack, textCallBack
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Download Help Document
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