1226584Sdim/*- 2226584Sdim * This code is derived from OpenBSD's libc/regex, original license follows: 3226584Sdim * 4226584Sdim * Copyright (c) 1992, 1993, 1994 Henry Spencer. 5226584Sdim * Copyright (c) 1992, 1993, 1994 6226584Sdim * The Regents of the University of California. All rights reserved. 7226584Sdim * 8226584Sdim * This code is derived from software contributed to Berkeley by 9226584Sdim * Henry Spencer. 10226584Sdim * 11226584Sdim * Redistribution and use in source and binary forms, with or without 12226584Sdim * modification, are permitted provided that the following conditions 13226584Sdim * are met: 14226584Sdim * 1. Redistributions of source code must retain the above copyright 15226584Sdim * notice, this list of conditions and the following disclaimer. 16226584Sdim * 2. Redistributions in binary form must reproduce the above copyright 17226584Sdim * notice, this list of conditions and the following disclaimer in the 18226584Sdim * documentation and/or other materials provided with the distribution. 19226584Sdim * 3. Neither the name of the University nor the names of its contributors 20226584Sdim * may be used to endorse or promote products derived from this software 21226584Sdim * without specific prior written permission. 22226584Sdim * 23234353Sdim * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24226584Sdim * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25226584Sdim * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26226584Sdim * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27226584Sdim * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28226584Sdim * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29226584Sdim * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30226584Sdim * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31226584Sdim * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32234353Sdim * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33234353Sdim * SUCH DAMAGE. 34226584Sdim * 35226584Sdim * @(#)regerror.c 8.4 (Berkeley) 3/20/94 36226584Sdim */ 37226584Sdim 38226584Sdim#include <sys/types.h> 39226584Sdim#include <stdio.h> 40226584Sdim#include <string.h> 41226584Sdim#include <ctype.h> 42226584Sdim#include <limits.h> 43226584Sdim#include <stdlib.h> 44226584Sdim#include "regex_impl.h" 45226584Sdim 46226584Sdim#include "regutils.h" 47226584Sdim 48226584Sdim#ifdef _MSC_VER 49226584Sdim#define snprintf _snprintf 50226584Sdim#endif 51234353Sdim 52226584Sdimstatic const char *regatoi(const llvm_regex_t *, char *, int); 53226584Sdim 54226584Sdimstatic struct rerr { 55226584Sdim int code; 56226584Sdim 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 numbers 80 = extern size_t llvm_regerror(int, const llvm_regex_t *, char *, size_t); 81 */ 82/* ARGSUSED */ 83size_t 84llvm_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 } else 104 (void)snprintf(convbuf, sizeof convbuf, 105 "REG_0x%x", target); 106 s = convbuf; 107 } else 108 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_ATOI 121 */ 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