regerror.c revision 1573
11573Srgrimes/*- 21573Srgrimes * Copyright (c) 1992, 1993, 1994 Henry Spencer. 31573Srgrimes * Copyright (c) 1992, 1993, 1994 41573Srgrimes * The Regents of the University of California. All rights reserved. 51573Srgrimes * 61573Srgrimes * This code is derived from software contributed to Berkeley by 71573Srgrimes * Henry Spencer. 81573Srgrimes * 91573Srgrimes * Redistribution and use in source and binary forms, with or without 101573Srgrimes * modification, are permitted provided that the following conditions 111573Srgrimes * are met: 121573Srgrimes * 1. Redistributions of source code must retain the above copyright 131573Srgrimes * notice, this list of conditions and the following disclaimer. 141573Srgrimes * 2. Redistributions in binary form must reproduce the above copyright 151573Srgrimes * notice, this list of conditions and the following disclaimer in the 161573Srgrimes * documentation and/or other materials provided with the distribution. 171573Srgrimes * 3. All advertising materials mentioning features or use of this software 181573Srgrimes * must display the following acknowledgement: 191573Srgrimes * This product includes software developed by the University of 201573Srgrimes * California, Berkeley and its contributors. 211573Srgrimes * 4. Neither the name of the University nor the names of its contributors 221573Srgrimes * may be used to endorse or promote products derived from this software 231573Srgrimes * without specific prior written permission. 241573Srgrimes * 251573Srgrimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 261573Srgrimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 271573Srgrimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 281573Srgrimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 291573Srgrimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 301573Srgrimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 311573Srgrimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 321573Srgrimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 331573Srgrimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 341573Srgrimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 351573Srgrimes * SUCH DAMAGE. 361573Srgrimes * 371573Srgrimes * @(#)regerror.c 8.4 (Berkeley) 3/20/94 381573Srgrimes */ 391573Srgrimes 401573Srgrimes#if defined(LIBC_SCCS) && !defined(lint) 411573Srgrimesstatic char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94"; 421573Srgrimes#endif /* LIBC_SCCS and not lint */ 431573Srgrimes 441573Srgrimes#include <sys/types.h> 451573Srgrimes#include <stdio.h> 461573Srgrimes#include <string.h> 471573Srgrimes#include <ctype.h> 481573Srgrimes#include <limits.h> 491573Srgrimes#include <stdlib.h> 501573Srgrimes#include <regex.h> 511573Srgrimes 521573Srgrimes#include "utils.h" 531573Srgrimes 541573Srgrimes/* ========= begin header generated by ./mkh ========= */ 551573Srgrimes#ifdef __cplusplus 561573Srgrimesextern "C" { 571573Srgrimes#endif 581573Srgrimes 591573Srgrimes/* === regerror.c === */ 601573Srgrimesstatic char *regatoi __P((const regex_t *preg, char *localbuf)); 611573Srgrimes 621573Srgrimes#ifdef __cplusplus 631573Srgrimes} 641573Srgrimes#endif 651573Srgrimes/* ========= end header generated by ./mkh ========= */ 661573Srgrimes/* 671573Srgrimes = #define REG_NOMATCH 1 681573Srgrimes = #define REG_BADPAT 2 691573Srgrimes = #define REG_ECOLLATE 3 701573Srgrimes = #define REG_ECTYPE 4 711573Srgrimes = #define REG_EESCAPE 5 721573Srgrimes = #define REG_ESUBREG 6 731573Srgrimes = #define REG_EBRACK 7 741573Srgrimes = #define REG_EPAREN 8 751573Srgrimes = #define REG_EBRACE 9 761573Srgrimes = #define REG_BADBR 10 771573Srgrimes = #define REG_ERANGE 11 781573Srgrimes = #define REG_ESPACE 12 791573Srgrimes = #define REG_BADRPT 13 801573Srgrimes = #define REG_EMPTY 14 811573Srgrimes = #define REG_ASSERT 15 821573Srgrimes = #define REG_INVARG 16 831573Srgrimes = #define REG_ATOI 255 // convert name to number (!) 841573Srgrimes = #define REG_ITOA 0400 // convert number to name (!) 851573Srgrimes */ 861573Srgrimesstatic struct rerr { 871573Srgrimes int code; 881573Srgrimes char *name; 891573Srgrimes char *explain; 901573Srgrimes} rerrs[] = { 911573Srgrimes REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match", 921573Srgrimes REG_BADPAT, "REG_BADPAT", "invalid regular expression", 931573Srgrimes REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element", 941573Srgrimes REG_ECTYPE, "REG_ECTYPE", "invalid character class", 951573Srgrimes REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)", 961573Srgrimes REG_ESUBREG, "REG_ESUBREG", "invalid backreference number", 971573Srgrimes REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced", 981573Srgrimes REG_EPAREN, "REG_EPAREN", "parentheses not balanced", 991573Srgrimes REG_EBRACE, "REG_EBRACE", "braces not balanced", 1001573Srgrimes REG_BADBR, "REG_BADBR", "invalid repetition count(s)", 1011573Srgrimes REG_ERANGE, "REG_ERANGE", "invalid character range", 1021573Srgrimes REG_ESPACE, "REG_ESPACE", "out of memory", 1031573Srgrimes REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid", 1041573Srgrimes REG_EMPTY, "REG_EMPTY", "empty (sub)expression", 1051573Srgrimes REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug", 1061573Srgrimes REG_INVARG, "REG_INVARG", "invalid argument to regex routine", 1071573Srgrimes 0, "", "*** unknown regexp error code ***", 1081573Srgrimes}; 1091573Srgrimes 1101573Srgrimes/* 1111573Srgrimes - regerror - the interface to error numbers 1121573Srgrimes = extern size_t regerror(int, const regex_t *, char *, size_t); 1131573Srgrimes */ 1141573Srgrimes/* ARGSUSED */ 1151573Srgrimessize_t 1161573Srgrimesregerror(errcode, preg, errbuf, errbuf_size) 1171573Srgrimesint errcode; 1181573Srgrimesconst regex_t *preg; 1191573Srgrimeschar *errbuf; 1201573Srgrimessize_t errbuf_size; 1211573Srgrimes{ 1221573Srgrimes register struct rerr *r; 1231573Srgrimes register size_t len; 1241573Srgrimes register int target = errcode &~ REG_ITOA; 1251573Srgrimes register char *s; 1261573Srgrimes char convbuf[50]; 1271573Srgrimes 1281573Srgrimes if (errcode == REG_ATOI) 1291573Srgrimes s = regatoi(preg, convbuf); 1301573Srgrimes else { 1311573Srgrimes for (r = rerrs; r->code != 0; r++) 1321573Srgrimes if (r->code == target) 1331573Srgrimes break; 1341573Srgrimes 1351573Srgrimes if (errcode®_ITOA) { 1361573Srgrimes if (r->code != 0) 1371573Srgrimes (void) strcpy(convbuf, r->name); 1381573Srgrimes else 1391573Srgrimes sprintf(convbuf, "REG_0x%x", target); 1401573Srgrimes assert(strlen(convbuf) < sizeof(convbuf)); 1411573Srgrimes s = convbuf; 1421573Srgrimes } else 1431573Srgrimes s = r->explain; 1441573Srgrimes } 1451573Srgrimes 1461573Srgrimes len = strlen(s) + 1; 1471573Srgrimes if (errbuf_size > 0) { 1481573Srgrimes if (errbuf_size > len) 1491573Srgrimes (void) strcpy(errbuf, s); 1501573Srgrimes else { 1511573Srgrimes (void) strncpy(errbuf, s, errbuf_size-1); 1521573Srgrimes errbuf[errbuf_size-1] = '\0'; 1531573Srgrimes } 1541573Srgrimes } 1551573Srgrimes 1561573Srgrimes return(len); 1571573Srgrimes} 1581573Srgrimes 1591573Srgrimes/* 1601573Srgrimes - regatoi - internal routine to implement REG_ATOI 1611573Srgrimes == static char *regatoi(const regex_t *preg, char *localbuf); 1621573Srgrimes */ 1631573Srgrimesstatic char * 1641573Srgrimesregatoi(preg, localbuf) 1651573Srgrimesconst regex_t *preg; 1661573Srgrimeschar *localbuf; 1671573Srgrimes{ 1681573Srgrimes register struct rerr *r; 1691573Srgrimes register size_t siz; 1701573Srgrimes register char *p; 1711573Srgrimes 1721573Srgrimes for (r = rerrs; r->code != 0; r++) 1731573Srgrimes if (strcmp(r->name, preg->re_endp) == 0) 1741573Srgrimes break; 1751573Srgrimes if (r->code == 0) 1761573Srgrimes return("0"); 1771573Srgrimes 1781573Srgrimes sprintf(localbuf, "%d", r->code); 1791573Srgrimes return(localbuf); 1801573Srgrimes} 181