regerror.c revision 302408
1178481Sjb/*- 2178481Sjb * Copyright (c) 1992, 1993, 1994 Henry Spencer. 3178481Sjb * Copyright (c) 1992, 1993, 1994 4178481Sjb * The Regents of the University of California. All rights reserved. 5178481Sjb * 6178481Sjb * This code is derived from software contributed to Berkeley by 7178481Sjb * Henry Spencer. 8178481Sjb * 9178481Sjb * Redistribution and use in source and binary forms, with or without 10178481Sjb * modification, are permitted provided that the following conditions 11178481Sjb * are met: 12178481Sjb * 1. Redistributions of source code must retain the above copyright 13178481Sjb * notice, this list of conditions and the following disclaimer. 14178481Sjb * 2. Redistributions in binary form must reproduce the above copyright 15178481Sjb * notice, this list of conditions and the following disclaimer in the 16178481Sjb * documentation and/or other materials provided with the distribution. 17178481Sjb * 4. Neither the name of the University nor the names of its contributors 18178481Sjb * may be used to endorse or promote products derived from this software 19178481Sjb * without specific prior written permission. 20178481Sjb * 21178481Sjb * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22178481Sjb * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23178481Sjb * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24178481Sjb * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25178481Sjb * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26178481Sjb * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27178481Sjb * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28178481Sjb * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29178481Sjb * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30178481Sjb * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31178481Sjb * SUCH DAMAGE. 32178481Sjb * 33178481Sjb * @(#)regerror.c 8.4 (Berkeley) 3/20/94 34178481Sjb */ 35178481Sjb 36178481Sjb#if defined(LIBC_SCCS) && !defined(lint) 37178481Sjbstatic char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94"; 38178481Sjb#endif /* LIBC_SCCS and not lint */ 39178481Sjb#include <sys/cdefs.h> 40277551Sdelphij__FBSDID("$FreeBSD: stable/11/lib/libc/regex/regerror.c 170528 2007-06-11 03:05:54Z delphij $"); 41277551Sdelphij 42178481Sjb#include <sys/types.h> 43178481Sjb#include <stdio.h> 44178481Sjb#include <string.h> 45178481Sjb#include <limits.h> 46178481Sjb#include <stdlib.h> 47178481Sjb#include <regex.h> 48178481Sjb 49178481Sjb#include "utils.h" 50178481Sjb 51178481Sjb/* ========= begin header generated by ./mkh ========= */ 52178481Sjb#ifdef __cplusplus 53178481Sjbextern "C" { 54178481Sjb#endif 55178481Sjb 56178481Sjb/* === regerror.c === */ 57178481Sjbstatic char *regatoi(const regex_t *preg, char *localbuf); 58178481Sjb 59178481Sjb#ifdef __cplusplus 60178481Sjb} 61178481Sjb#endif 62178481Sjb/* ========= end header generated by ./mkh ========= */ 63178481Sjb/* 64178481Sjb = #define REG_NOMATCH 1 65178481Sjb = #define REG_BADPAT 2 66178481Sjb = #define REG_ECOLLATE 3 67178481Sjb = #define REG_ECTYPE 4 68178481Sjb = #define REG_EESCAPE 5 69178481Sjb = #define REG_ESUBREG 6 70178481Sjb = #define REG_EBRACK 7 71178481Sjb = #define REG_EPAREN 8 72178481Sjb = #define REG_EBRACE 9 73178481Sjb = #define REG_BADBR 10 74178481Sjb = #define REG_ERANGE 11 75178481Sjb = #define REG_ESPACE 12 76178481Sjb = #define REG_BADRPT 13 77178481Sjb = #define REG_EMPTY 14 78178481Sjb = #define REG_ASSERT 15 79178481Sjb = #define REG_INVARG 16 80178481Sjb = #define REG_ILLSEQ 17 81178481Sjb = #define REG_ATOI 255 // convert name to number (!) 82178481Sjb = #define REG_ITOA 0400 // convert number to name (!) 83178481Sjb */ 84178481Sjbstatic struct rerr { 85178481Sjb int code; 86178481Sjb char *name; 87178481Sjb char *explain; 88178481Sjb} rerrs[] = { 89178481Sjb {REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match"}, 90178481Sjb {REG_BADPAT, "REG_BADPAT", "invalid regular expression"}, 91178481Sjb {REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element"}, 92178481Sjb {REG_ECTYPE, "REG_ECTYPE", "invalid character class"}, 93178481Sjb {REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)"}, 94178546Sjb {REG_ESUBREG, "REG_ESUBREG", "invalid backreference number"}, 95178481Sjb {REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced"}, 96178481Sjb {REG_EPAREN, "REG_EPAREN", "parentheses not balanced"}, 97178481Sjb {REG_EBRACE, "REG_EBRACE", "braces not balanced"}, 98178481Sjb {REG_BADBR, "REG_BADBR", "invalid repetition count(s)"}, 99178481Sjb {REG_ERANGE, "REG_ERANGE", "invalid character range"}, 100178481Sjb {REG_ESPACE, "REG_ESPACE", "out of memory"}, 101178481Sjb {REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid"}, 102178481Sjb {REG_EMPTY, "REG_EMPTY", "empty (sub)expression"}, 103178481Sjb {REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug"}, 104178481Sjb {REG_INVARG, "REG_INVARG", "invalid argument to regex routine"}, 105178481Sjb {REG_ILLSEQ, "REG_ILLSEQ", "illegal byte sequence"}, 106178481Sjb {0, "", "*** unknown regexp error code ***"} 107178481Sjb}; 108178481Sjb 109178481Sjb/* 110178481Sjb - regerror - the interface to error numbers 111178481Sjb = extern size_t regerror(int, const regex_t *, char *, size_t); 112178481Sjb */ 113178481Sjb/* ARGSUSED */ 114178481Sjbsize_t 115178481Sjbregerror(int errcode, 116178481Sjb const regex_t * __restrict preg, 117178481Sjb char * __restrict errbuf, 118178481Sjb size_t errbuf_size) 119178481Sjb{ 120178481Sjb struct rerr *r; 121178481Sjb size_t len; 122178481Sjb int target = errcode &~ REG_ITOA; 123178481Sjb char *s; 124178481Sjb char convbuf[50]; 125178481Sjb 126178481Sjb if (errcode == REG_ATOI) 127178481Sjb s = regatoi(preg, convbuf); 128178481Sjb else { 129178481Sjb for (r = rerrs; r->code != 0; r++) 130178481Sjb if (r->code == target) 131178481Sjb break; 132178481Sjb 133178481Sjb if (errcode®_ITOA) { 134178481Sjb if (r->code != 0) 135178481Sjb (void) strcpy(convbuf, r->name); 136178481Sjb else 137178481Sjb sprintf(convbuf, "REG_0x%x", target); 138178481Sjb assert(strlen(convbuf) < sizeof(convbuf)); 139178481Sjb s = convbuf; 140178481Sjb } else 141178481Sjb s = r->explain; 142178481Sjb } 143178481Sjb 144178481Sjb len = strlen(s) + 1; 145178481Sjb if (errbuf_size > 0) { 146178481Sjb if (errbuf_size > len) 147178481Sjb (void) strcpy(errbuf, s); 148178481Sjb else { 149178481Sjb (void) strncpy(errbuf, s, errbuf_size-1); 150178481Sjb errbuf[errbuf_size-1] = '\0'; 151178481Sjb } 152178481Sjb } 153178481Sjb 154178481Sjb return(len); 155178481Sjb} 156178481Sjb 157178481Sjb/* 158178481Sjb - regatoi - internal routine to implement REG_ATOI 159178481Sjb == static char *regatoi(const regex_t *preg, char *localbuf); 160178481Sjb */ 161178481Sjbstatic char * 162253661Spfgregatoi(const regex_t *preg, char *localbuf) 163178481Sjb{ 164178481Sjb struct rerr *r; 165178481Sjb 166178481Sjb for (r = rerrs; r->code != 0; r++) 167178481Sjb if (strcmp(r->name, preg->re_endp) == 0) 168178481Sjb break; 169178481Sjb if (r->code == 0) 170178481Sjb return("0"); 171178481Sjb 172178481Sjb sprintf(localbuf, "%d", r->code); 173178481Sjb return(localbuf); 174178481Sjb} 175178481Sjb