1/*	$OpenBSD: mtherr.c,v 1.1 2011/07/02 18:11:01 martynas Exp $	*/
2
3/*
4 * Copyright (c) 2008 Stephen L. Moshier <steve@moshier.net>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19/*							mtherr.c
20 *
21 *	Library common error handling routine
22 *
23 *
24 *
25 * SYNOPSIS:
26 *
27 * char *fctnam;
28 * int code;
29 * int mtherr();
30 *
31 * mtherr( fctnam, code );
32 *
33 *
34 *
35 * DESCRIPTION:
36 *
37 * This routine may be called to report one of the following
38 * error conditions (in the include file mconf.h).
39 *
40 *   Mnemonic        Value          Significance
41 *
42 *    DOMAIN            1       argument domain error
43 *    SING              2       function singularity
44 *    OVERFLOW          3       overflow range error
45 *    UNDERFLOW         4       underflow range error
46 *    TLOSS             5       total loss of precision
47 *    PLOSS             6       partial loss of precision
48 *    EDOM             33       Unix domain error code
49 *    ERANGE           34       Unix range error code
50 *
51 * The default version of the file prints the function name,
52 * passed to it by the pointer fctnam, followed by the
53 * error condition.  The display is directed to the standard
54 * output device.  The routine then returns to the calling
55 * program.  Users may wish to modify the program to abort by
56 * calling exit() under severe error conditions such as domain
57 * errors.
58 *
59 * Since all error conditions pass control to this function,
60 * the display may be easily changed, eliminated, or directed
61 * to an error logging device.
62 *
63 * SEE ALSO:
64 *
65 * mconf.h
66 *
67 */
68
69#include <stdio.h>
70#include "mconf.h"
71
72int merror = 0;
73
74/* Notice: the order of appearance of the following
75 * messages is bound to the error codes defined
76 * in mconf.h.
77 */
78static char *ermsg[7] = {
79"unknown",      /* error code 0 */
80"domain",       /* error code 1 */
81"singularity",  /* et seq.      */
82"overflow",
83"underflow",
84"total loss of precision",
85"partial loss of precision"
86};
87
88
89int mtherr( name, code )
90char *name;
91int code;
92{
93
94/* Display string passed by calling program,
95 * which is supposed to be the name of the
96 * function in which the error occurred:
97 */
98printf( "\n%s ", name );
99
100/* Set global error message word */
101merror = code;
102
103/* Display error message defined
104 * by the code argument.
105 */
106if( (code <= 0) || (code >= 7) )
107	code = 0;
108printf( "%s error\n", ermsg[code] );
109
110/* Return to calling
111 * program
112 */
113return( 0 );
114}
115