1 /* 2 * Copyright (c) 1997 - 2001 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #ifdef HAVE_CONFIG_H 35 #include <config.h> 36 RCSID("$Id: com_err.c,v 1.17 2001/05/11 20:02:34 assar Exp $"); 37 #endif 38 #include <stdio.h> 39 #include <stdlib.h> 40 #include <string.h> 41 #include <roken.h> 42 #include "com_err.h" 43 44 struct et_list *_et_list = NULL; 45 46 47 const char * 48 error_message (long code) 49 { 50 static char msg[128]; 51 const char *p = com_right(_et_list, code); 52 if (p == NULL) 53 p = strerror(code); 54 if (p != NULL && *p != '\0') { 55 strncpy(msg, p, sizeof(msg) - 1); 56 msg[sizeof(msg) - 1] = 0; 57 } else 58 sprintf(msg, "Unknown error %ld", code); 59 return msg; 60 } 61 62 int 63 init_error_table(const char **msgs, long base, int count) 64 { 65 initialize_error_table_r(&_et_list, msgs, count, base); 66 return 0; 67 } 68 69 static void 70 default_proc (const char *whoami, long code, const char *fmt, va_list args) 71 __attribute__((__format__(__printf__, 3, 0))); 72 73 static void 74 default_proc (const char *whoami, long code, const char *fmt, va_list args) 75 { 76 if (whoami) 77 fprintf(stderr, "%s: ", whoami); 78 if (code) 79 fprintf(stderr, "%s ", error_message(code)); 80 if (fmt) 81 vfprintf(stderr, fmt, args); 82 fprintf(stderr, "\r\n"); /* ??? */ 83 } 84 85 static errf com_err_hook = default_proc; 86 87 void 88 com_err_va (const char *whoami, 89 long code, 90 const char *fmt, 91 va_list args) 92 { 93 (*com_err_hook) (whoami, code, fmt, args); 94 } 95 96 void 97 com_err (const char *whoami, 98 long code, 99 const char *fmt, 100 ...) 101 { 102 va_list ap; 103 va_start(ap, fmt); 104 com_err_va (whoami, code, fmt, ap); 105 va_end(ap); 106 } 107 108 errf 109 set_com_err_hook (errf new) 110 { 111 errf old = com_err_hook; 112 113 if (new) 114 com_err_hook = new; 115 else 116 com_err_hook = default_proc; 117 118 return old; 119 } 120 121 errf 122 reset_com_err_hook (void) 123 { 124 return set_com_err_hook(NULL); 125 } 126 127 #define ERRCODE_RANGE 8 /* # of bits to shift table number */ 128 #define BITS_PER_CHAR 6 /* # bits to shift per character in name */ 129 130 static const char char_set[] = 131 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"; 132 133 static char buf[6]; 134 135 const char * 136 error_table_name(int num) 137 { 138 int ch; 139 int i; 140 char *p; 141 142 /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */ 143 p = buf; 144 num >>= ERRCODE_RANGE; 145 /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */ 146 num &= 077777777; 147 /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */ 148 for (i = 4; i >= 0; i--) { 149 ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1); 150 if (ch != 0) 151 *p++ = char_set[ch-1]; 152 } 153 *p = '\0'; 154 return(buf); 155 } 156 157 void 158 add_to_error_table(struct et_list *new_table) 159 { 160 struct et_list *et; 161 162 for (et = _et_list; et; et = et->next) { 163 if (et->table->base == new_table->table->base) 164 return; 165 } 166 167 new_table->next = _et_list; 168 _et_list = new_table; 169 } 170