GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: lib/libc/regex/regerror.c Lines: 0 23 0.0 %
Date: 2017-11-07 Branches: 0 18 0.0 %

Line Branch Exec Source
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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&REG_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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}