1 /* 2 * Copyright (c) 1997 - 2002 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 1.18 2002/03/10 23:07:01 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 if (code < 0) 54 sprintf(msg, "Unknown error %ld", code); 55 else 56 p = strerror(code); 57 } 58 if (p != NULL && *p != '\0') { 59 strncpy(msg, p, sizeof(msg) - 1); 60 msg[sizeof(msg) - 1] = 0; 61 } else 62 sprintf(msg, "Unknown error %ld", code); 63 return msg; 64 } 65 66 int 67 init_error_table(const char **msgs, long base, int count) 68 { 69 initialize_error_table_r(&_et_list, msgs, count, base); 70 return 0; 71 } 72 73 static void 74 default_proc (const char *whoami, long code, const char *fmt, va_list args) 75 __attribute__((__format__(__printf__, 3, 0))); 76 77 static void 78 default_proc (const char *whoami, long code, const char *fmt, va_list args) 79 { 80 if (whoami) 81 fprintf(stderr, "%s: ", whoami); 82 if (code) 83 fprintf(stderr, "%s ", error_message(code)); 84 if (fmt) 85 vfprintf(stderr, fmt, args); 86 fprintf(stderr, "\r\n"); /* ??? */ 87 } 88 89 static errf com_err_hook = default_proc; 90 91 void 92 com_err_va (const char *whoami, 93 long code, 94 const char *fmt, 95 va_list args) 96 { 97 (*com_err_hook) (whoami, code, fmt, args); 98 } 99 100 void 101 com_err (const char *whoami, 102 long code, 103 const char *fmt, 104 ...) 105 { 106 va_list ap; 107 va_start(ap, fmt); 108 com_err_va (whoami, code, fmt, ap); 109 va_end(ap); 110 } 111 112 errf 113 set_com_err_hook (errf new) 114 { 115 errf old = com_err_hook; 116 117 if (new) 118 com_err_hook = new; 119 else 120 com_err_hook = default_proc; 121 122 return old; 123 } 124 125 errf 126 reset_com_err_hook (void) 127 { 128 return set_com_err_hook(NULL); 129 } 130 131 #define ERRCODE_RANGE 8 /* # of bits to shift table number */ 132 #define BITS_PER_CHAR 6 /* # bits to shift per character in name */ 133 134 static const char char_set[] = 135 "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_"; 136 137 static char buf[6]; 138 139 const char * 140 error_table_name(int num) 141 { 142 int ch; 143 int i; 144 char *p; 145 146 /* num = aa aaa abb bbb bcc ccc cdd ddd d?? ??? ??? */ 147 p = buf; 148 num >>= ERRCODE_RANGE; 149 /* num = ?? ??? ??? aaa aaa bbb bbb ccc ccc ddd ddd */ 150 num &= 077777777; 151 /* num = 00 000 000 aaa aaa bbb bbb ccc ccc ddd ddd */ 152 for (i = 4; i >= 0; i--) { 153 ch = (num >> BITS_PER_CHAR * i) & ((1 << BITS_PER_CHAR) - 1); 154 if (ch != 0) 155 *p++ = char_set[ch-1]; 156 } 157 *p = '\0'; 158 return(buf); 159 } 160 161 void 162 add_to_error_table(struct et_list *new_table) 163 { 164 struct et_list *et; 165 166 for (et = _et_list; et; et = et->next) { 167 if (et->table->base == new_table->table->base) 168 return; 169 } 170 171 new_table->next = _et_list; 172 _et_list = new_table; 173 } 174