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1/*-2 * This code is derived from OpenBSD's libc/regex, original license follows:3 *4 * Copyright (c) 1992, 1993, 1994 Henry Spencer.5 * Copyright (c) 1992, 1993, 19946 * The Regents of the University of California. All rights reserved.7 *8 * This code is derived from software contributed to Berkeley by9 * Henry Spencer.10 *11 * Redistribution and use in source and binary forms, with or without12 * modification, are permitted provided that the following conditions13 * are met:14 * 1. Redistributions of source code must retain the above copyright15 * notice, this list of conditions and the following disclaimer.16 * 2. Redistributions in binary form must reproduce the above copyright17 * notice, this list of conditions and the following disclaimer in the18 * documentation and/or other materials provided with the distribution.19 * 3. Neither the name of the University nor the names of its contributors20 * may be used to endorse or promote products derived from this software21 * without specific prior written permission.22 *23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF33 * SUCH DAMAGE.34 *35 * @(#)regerror.c 8.4 (Berkeley) 3/20/9436 */37 38#include <sys/types.h>39#include <stdio.h>40#include <string.h>41#include <ctype.h>42#include <limits.h>43#include <stdlib.h>44#include "regex_impl.h"45 46#include "regutils.h"47 48#ifdef _MSC_VER49#define snprintf _snprintf50#endif51 52static const char *regatoi(const llvm_regex_t *, char *, int);53 54static struct rerr {55 int code;56 const char *name;57 const char *explain;58} rerrs[] = {59 { REG_NOMATCH, "REG_NOMATCH", "llvm_regexec() failed to match" },60 { REG_BADPAT, "REG_BADPAT", "invalid regular expression" },61 { REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element" },62 { REG_ECTYPE, "REG_ECTYPE", "invalid character class" },63 { REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)" },64 { REG_ESUBREG, "REG_ESUBREG", "invalid backreference number" },65 { REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced" },66 { REG_EPAREN, "REG_EPAREN", "parentheses not balanced" },67 { REG_EBRACE, "REG_EBRACE", "braces not balanced" },68 { REG_BADBR, "REG_BADBR", "invalid repetition count(s)" },69 { REG_ERANGE, "REG_ERANGE", "invalid character range" },70 { REG_ESPACE, "REG_ESPACE", "out of memory" },71 { REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid" },72 { REG_EMPTY, "REG_EMPTY", "empty (sub)expression" },73 { REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug" },74 { REG_INVARG, "REG_INVARG", "invalid argument to regex routine" },75 { 0, "", "*** unknown regexp error code ***" }76};77 78/*79 - llvm_regerror - the interface to error numbers80 = extern size_t llvm_regerror(int, const llvm_regex_t *, char *, size_t);81 */82/* ARGSUSED */83size_t84llvm_regerror(int errcode, const llvm_regex_t *preg, char *errbuf, size_t errbuf_size)85{86 struct rerr *r;87 size_t len;88 int target = errcode &~ REG_ITOA;89 const char *s;90 char convbuf[50];91 92 if (errcode == REG_ATOI)93 s = regatoi(preg, convbuf, sizeof convbuf);94 else {95 for (r = rerrs; r->code != 0; r++)96 if (r->code == target)97 break;98 99 if (errcode®_ITOA) {100 if (r->code != 0) {101 assert(strlen(r->name) < sizeof(convbuf));102 (void) llvm_strlcpy(convbuf, r->name, sizeof convbuf);103 } else104 (void)snprintf(convbuf, sizeof convbuf,105 "REG_0x%x", target);106 s = convbuf;107 } else108 s = r->explain;109 }110 111 len = strlen(s) + 1;112 if (errbuf_size > 0) {113 llvm_strlcpy(errbuf, s, errbuf_size);114 }115 116 return(len);117}118 119/*120 - regatoi - internal routine to implement REG_ATOI121 */122static const char *123regatoi(const llvm_regex_t *preg, char *localbuf, int localbufsize)124{125 struct rerr *r;126 127 for (r = rerrs; r->code != 0; r++)128 if (strcmp(r->name, preg->re_endp) == 0)129 break;130 if (r->code == 0)131 return("0");132 133 (void)snprintf(localbuf, localbufsize, "%d", r->code);134 return(localbuf);135}136