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/*
* jerror.c
*
* Copyright (C) 1991, Thomas G. Lane.
* This file is part of the Independent JPEG Group's software.
* For conditions of distribution and use, see the accompanying README file.
*
* This file contains simple error-reporting and trace-message routines.
* These are suitable for Unix-like systems and others where writing to
* stderr is the right thing to do. If the JPEG software is integrated
* into a larger application, you may well need to replace these.
*
* The error_exit() routine should not return to its caller. Within a
* larger application, you might want to have it do a longjmp() to return
* control to the outer user interface routine. This should work since
* the portable JPEG code doesn't use setjmp/longjmp. However, this won't
* release allocated memory or close temp files --- some bookkeeping would
* need to be added to the memory manager module to make that work.
*
* These routines are used by both the compression and decompression code.
*/
#include "jinclude.h"
#ifdef __STDC__
#include <stdlib.h> /* to declare exit() */
#endif
static external_methods_ptr methods; /* saved for access to message_parm */
METHODDEF void
trace_message (char *msgtext)
{
fprintf(stderr, msgtext,
methods->message_parm[0], methods->message_parm[1],
methods->message_parm[2], methods->message_parm[3],
methods->message_parm[4], methods->message_parm[5],
methods->message_parm[6], methods->message_parm[7]);
fprintf(stderr, "\n");
}
METHODDEF void
error_exit (char *msgtext)
{
trace_message(msgtext);
exit(1);
}
/*
* The method selection routine for simple error handling.
* The system-dependent setup routine should call this routine
* to install the necessary method pointers in the supplied struct.
*/
GLOBAL void
jselerror (external_methods_ptr emethods)
{
methods = emethods; /* save struct addr for msg parm access */
emethods->error_exit = error_exit;
emethods->trace_message = trace_message;
emethods->trace_level = 0; /* default = no tracing */
}
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