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 72 int 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 */ 78 static 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 89 int mtherr( name, code ) 90 char *name; 91 int 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 */ 98 printf( "\n%s ", name ); 99 100 /* Set global error message word */ 101 merror = code; 102 103 /* Display error message defined 104 * by the code argument. 105 */ 106 if( (code <= 0) || (code >= 7) ) 107 code = 0; 108 printf( "%s error\n", ermsg[code] ); 109 110 /* Return to calling 111 * program 112 */ 113 return( 0 ); 114 } 115