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products/Sources/formale Sprachen/C/Cephes/cmath/ (Cephes Mathematical Library ^©) Datei vom 12.5.2026 mit Größe 2 kB

Quelle mtherr.c

Sprache: C

/* mtherr.c
*
* Library common error handling routine
*
*
*
* SYNOPSIS:
*
* char *fctnam;
* int code;
* int mtherr();
*
* mtherr( fctnam, code );
*
*
*
* DESCRIPTION:
*
* This routine may be called to report one of the following
* error conditions (in the include file mconf.h).
*
*   Mnemonic        Value          Significance
*
*    DOMAIN            1       argument domain error
*    SING              2       function singularity
*    OVERFLOW          3       overflow range error
*    UNDERFLOW         4       underflow range error
*    TLOSS             5       total loss of precision
*    PLOSS             6       partial loss of precision
*    EDOM             33       Unix domain error code
*    ERANGE           34       Unix range error code
*
* The default version of the file prints the function name,
* passed to it by the pointer fctnam, followed by the
* error condition.  The display is directed to the standard
* output device.  The routine then returns to the calling
* program.  Users may wish to modify the program to abort by
* calling exit() under severe error conditions such as domain
* errors.
*
* Since all error conditions pass control to this function,
* the display may be easily changed, eliminated, or directed
* to an error logging device.
*
* SEE ALSO:
*
* mconf.h
*
*/

/*
Cephes Math Library Release 2.0:  April, 1987
Copyright 1984, 1987 by Stephen L. Moshier
Direct inquiries to 30 Frost Street, Cambridge, MA 02140
*/

#include <stdio.h>
#include "mconf.h"

int merror = 0;

/* Notice: the order of appearance of the following
* messages is bound to the error codes defined
* in mconf.h.
*/
static char *ermsg[7] = {
"unknown",      /* error code 0 */
"domain",       /* error code 1 */
"singularity",  /* et seq.      */
"overflow",
"underflow",
"total loss of precision",
"partial loss of precision"
};

int mtherr( name, code )
char *name;
int code;
{

/* Display string passed by calling program,
* which is supposed to be the name of the
* function in which the error occurred:
*/
printf( "\n%s ", name );

/* Set global error message word */
merror = code;

/* Display error message defined
* by the code argument.
*/
if( (code <= 0) || (code >= 7) )
code = 0;
printf( "%s error\n", ermsg[code] );

/* Return to calling
* program
*/
return( 0 );
}

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