130 lines
4.3 KiB
C
130 lines
4.3 KiB
C
/* $OpenBSD: regerror.c,v 1.15 2020/12/30 08:56:38 tb 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 const char *regatoi(const regex_t *, char *, int);
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static const struct rerr {
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int code;
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const char *name;
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const 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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cli_regerror(int errcode, const regex_t *preg, char *errbuf, size_t errbuf_size)
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{
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const struct rerr *r;
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size_t len;
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int target = errcode &~ REG_ITOA;
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const 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) cli_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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if (errbuf_size != 0)
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len = cli_strlcpy(errbuf, s, errbuf_size);
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else
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len = strlen(s);
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return len + 1;
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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 const char *
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regatoi(const regex_t *preg, char *localbuf, int localbufsize)
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{
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const 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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}
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