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128 lines
3.7 KiB
C
128 lines
3.7 KiB
C
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/* mtherr.c
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*
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* Library common error handling routine
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*
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*
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*
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* SYNOPSIS:
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*
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* char *fctnam;
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* int code;
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* int mtherr();
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*
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* mtherr( fctnam, code );
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*
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*
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*
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* DESCRIPTION:
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*
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* This routine may be called to report one of the following
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* error conditions (in the include file mconf.h).
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*
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* Mnemonic Value Significance
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*
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* DOMAIN 1 argument domain error
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* SING 2 function singularity
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* OVERFLOW 3 overflow range error
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* UNDERFLOW 4 underflow range error
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* TLOSS 5 total loss of precision
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* PLOSS 6 partial loss of precision
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* EDOM 33 Unix domain error code
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* ERANGE 34 Unix range error code
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*
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* The default version of the file prints the function name,
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* passed to it by the pointer fctnam, followed by the
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* error condition. The display is directed to the standard
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* output device. The routine then returns to the calling
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* program. Users may wish to modify the program to abort by
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* calling exit() under severe error conditions such as domain
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* errors.
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*
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* Since all error conditions pass control to this function,
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* the display may be easily changed, eliminated, or directed
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* to an error logging device.
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*
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* SEE ALSO:
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*
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* mconf.h
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*
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*/
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/*
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Cephes Math Library Release 2.0: April, 1987
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Copyright 1984, 1987 by Stephen L. Moshier
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. Neither the name of the <ORGANIZATION> nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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Direct inquiries to 30 Frost Street, Cambridge, MA 02140
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*/
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#include <stdio.h>
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#include "mconf.h"
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int merror = 0;
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/* Notice: the order of appearance of the following
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* messages is bound to the error codes defined
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* in mconf.h.
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*/
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static char *ermsg[7] = {
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"unknown", /* error code 0 */
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"domain", /* error code 1 */
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"singularity", /* et seq. */
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"overflow",
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"underflow",
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"total loss of precision",
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"partial loss of precision"
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};
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int mtherr( name, code )
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char *name;
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int code;
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{
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/* Display string passed by calling program,
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* which is supposed to be the name of the
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* function in which the error occurred:
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*/
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printf( "\n%s ", name );
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/* Set global error message word */
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merror = code;
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/* Display error message defined
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* by the code argument.
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*/
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if( (code <= 0) || (code >= 7) )
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code = 0;
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printf( "%s error\n", ermsg[code] );
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/* Return to calling
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* program
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*/
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return( 0 );
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}
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