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8
Libraries
through the error handler. Therefore, if you redefine either of these functions,
the MCR will use your version of the function for all the output that falls into
class for which it invokes that handler.
The default print handler takes the following form.
static int mclDefaultPrintHandler(const char *s)
The implementation is straightforward; it takes a string, prints it on standard
output, and returns the number of characters printed. If you override or
replace this function, your version must also take a string and return the
number of characters “handled.” The MCR calls the print handler when an
executing MATLAB file makes a request for printed output, e.g., via the
MATLAB function disp. The print handler does not terminate the output
with a carriage return or line feed.
The default error handler has the same form as the print handler.
static int mclDefaultErrorHandler(const char *s)
However, the default implementation of the print handler is slightly different.
It sends the output to the standard error output stream, but if the string does
not end with carriage return, the error handler adds one. If you replace the
default error handler with one of your own, you should perform this check as
well, or some of the error messages printed by the MCR will not be properly
formatted.
Caution The error handler, despite its name, does not handle the actual
errors, but rather the message produced after the errors have been caught
and handled inside the MCR. You cannot use this function to modify the error
handling behavior of the MCR -- use the try and catch statements in your
MATLAB files if you want to control how a MATLAB Compiler generated
application responds to an error condition.
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