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, 1994 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Henry Spencer. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)regerror.c 8.4 (Berkeley) 3/20/94 36 */ 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_VER 49 #define snprintf _snprintf 50 #endif 51 52 static const char *regatoi(const llvm_regex_t *, char *, int); 53 54 static 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 numbers 80 = extern size_t llvm_regerror(int, const llvm_regex_t *, char *, size_t); 81 */ 82 /* ARGSUSED */ 83 size_t 84 llvm_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 */ 122 static const char * 123 regatoi(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