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