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/* $OpenBSD: regerror.c,v 1.14 2015/11/01 03:45:29 guenther Exp $ */ |
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/*- |
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* Copyright (c) 1992, 1993, 1994 Henry Spencer. |
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* Copyright (c) 1992, 1993, 1994 |
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* The Regents of the University of California. All rights reserved. |
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* |
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* This code is derived from software contributed to Berkeley by |
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* Henry Spencer. |
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* |
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* Redistribution and use in source and binary forms, with or without |
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* modification, are permitted provided that the following conditions |
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* are met: |
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* 1. Redistributions of source code must retain the above copyright |
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* notice, this list of conditions and the following disclaimer. |
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* 2. Redistributions in binary form must reproduce the above copyright |
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* notice, this list of conditions and the following disclaimer in the |
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* documentation and/or other materials provided with the distribution. |
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* 3. Neither the name of the University nor the names of its contributors |
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* may be used to endorse or promote products derived from this software |
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* without specific prior written permission. |
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* |
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
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* SUCH DAMAGE. |
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* |
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* @(#)regerror.c 8.4 (Berkeley) 3/20/94 |
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*/ |
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#include <sys/types.h> |
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#include <stdio.h> |
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#include <string.h> |
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#include <ctype.h> |
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#include <limits.h> |
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#include <stdlib.h> |
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#include <regex.h> |
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#include "utils.h" |
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static char *regatoi(const regex_t *, char *, int); |
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static struct rerr { |
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int code; |
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char *name; |
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char *explain; |
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} rerrs[] = { |
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{ REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match" }, |
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{ REG_BADPAT, "REG_BADPAT", "invalid regular expression" }, |
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{ REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element" }, |
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{ REG_ECTYPE, "REG_ECTYPE", "invalid character class" }, |
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{ REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\\)" }, |
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{ REG_ESUBREG, "REG_ESUBREG", "invalid backreference number" }, |
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{ REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced" }, |
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{ REG_EPAREN, "REG_EPAREN", "parentheses not balanced" }, |
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{ REG_EBRACE, "REG_EBRACE", "braces not balanced" }, |
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{ REG_BADBR, "REG_BADBR", "invalid repetition count(s)" }, |
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{ REG_ERANGE, "REG_ERANGE", "invalid character range" }, |
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{ REG_ESPACE, "REG_ESPACE", "out of memory" }, |
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{ REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid" }, |
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{ REG_EMPTY, "REG_EMPTY", "empty (sub)expression" }, |
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{ REG_ASSERT, "REG_ASSERT", "\"can't happen\" -- you found a bug" }, |
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{ REG_INVARG, "REG_INVARG", "invalid argument to regex routine" }, |
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{ 0, "", "*** unknown regexp error code ***" } |
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}; |
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/* |
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- regerror - the interface to error numbers |
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= extern size_t regerror(int, const regex_t *, char *, size_t); |
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*/ |
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size_t |
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regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size) |
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{ |
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struct rerr *r; |
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size_t len; |
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int target = errcode &~ REG_ITOA; |
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char *s; |
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char convbuf[50]; |
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if (errcode == REG_ATOI) |
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s = regatoi(preg, convbuf, sizeof convbuf); |
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else { |
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for (r = rerrs; r->code != 0; r++) |
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if (r->code == target) |
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break; |
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if (errcode®_ITOA) { |
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if (r->code != 0) { |
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assert(strlen(r->name) < sizeof(convbuf)); |
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(void) strlcpy(convbuf, r->name, sizeof convbuf); |
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} else |
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(void)snprintf(convbuf, sizeof convbuf, |
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"REG_0x%x", target); |
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s = convbuf; |
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} else |
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s = r->explain; |
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} |
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len = strlen(s) + 1; |
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if (errbuf_size > 0) { |
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strlcpy(errbuf, s, errbuf_size); |
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} |
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return(len); |
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} |
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/* |
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- regatoi - internal routine to implement REG_ATOI |
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*/ |
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static char * |
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regatoi(const regex_t *preg, char *localbuf, int localbufsize) |
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{ |
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struct rerr *r; |
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for (r = rerrs; r->code != 0; r++) |
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if (strcmp(r->name, preg->re_endp) == 0) |
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break; |
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if (r->code == 0) |
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return("0"); |
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(void)snprintf(localbuf, localbufsize, "%d", r->code); |
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return(localbuf); |
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} |