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regerror.c (2891B)


      1 /*
      2  * Changes by Gunnar Ritter, Freiburg i. Br., Germany, November 2002.
      3  *
      4  * Sccsid @(#)regerror.c	1.4 (gritter) 3/29/03
      5  */
      6 /*  UNIX(R) Regular Expresssion Library
      7  *
      8  *  Note: Code is released under the GNU LGPL
      9  *
     10  *  Copyright (C) 2001 Caldera International, Inc.
     11  *
     12  *  This library is free software; you can redistribute it and/or
     13  *  modify it under the terms of the GNU Lesser General Public
     14  *  License as published by the Free Software Foundation; either
     15  *  version 2 of the License, or (at your option) any later version.
     16  *
     17  *  This library is distributed in the hope that it will be useful,
     18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
     19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     20  *  Lesser General Public License for more details.
     21  *
     22  *  You should have received a copy of the GNU Lesser General Public
     23  *  License along with this library; if not, write to:
     24  *        Free Software Foundation, Inc.
     25  *        59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
     26  */
     27 
     28 /*	#include "synonyms.h"	*/
     29 #include <string.h>
     30 #include "re.h"
     31 /*	include "_locale.h"	*/
     32 
     33 /*	#pragma weak regerror = _regerror	*/
     34 
     35 size_t
     36 regerror(int err, const regex_t *ep, char *str, size_t max)
     37 {
     38 	const struct
     39 	{
     40 		int		index;
     41 		const char	*str;
     42 	} unk = 
     43 	{
     44 			88,  "unknown regular expression error"
     45 	}, msgs[] =
     46 	{
     47 	/*ENOSYS*/	{ 89,  "feature not implemented" },
     48 	/*0*/		{ 0,   "" },
     49 	/*NOMATCH*/	{ 90,  "regular expression failed to match" },
     50 	/*BADPAT*/	{ 91,  "invalid regular expression" },
     51 	/*ECOLLATE*/	{ 92,  "invalid collating element construct" },
     52 	/*ECTYPE*/	{ 93,  "invalid character class construct" },
     53 	/*EEQUIV*/	{ 94,  "invalid equivalence class construct" },
     54 	/*EBKTCHAR*/	{ 95,  "invalid character in '[ ]' construct" },
     55 	/*EESCAPE*/	{ 96,  "trailing \\ in pattern" },
     56 	/*ESUBREG*/	{ 97,  "'\\digit' out of range" },
     57 	/*EBRACK*/	{ 98,  "'[ ]' imbalance" },
     58 	/*EMPTYSUBBKT*/	{ 99,  "empty nested '[ ]' construct" },
     59 	/*EMPTYPAREN*/	{ 100, "empty '\\( \\)' or '( )'" },
     60 	/*NOPAT*/	{ 101, "empty pattern" },
     61 	/*EPAREN*/	{ 102, "'\\( \\)' or '( )' imbalance" },
     62 	/*EBRACE*/	{ 103, "'\\{ \\} or '{ }' imbalance" },
     63 	/*BADBR*/	{ 104, "invalid '\\{ \\}' or '{ }'" },
     64 	/*ERANGE*/	{ 105, "invalid endpoint in range" },
     65 	/*ESPACE*/	{ 106, "out of regular expression memory" },
     66 	/*BADRPT*/	{ 107, "invalid *, +, ?, \\{\\} or {} operator" },
     67 	/*BADESC*/	{ 108, "invalid escape sequence (e.g. \\0)" },
     68 	/*ILLSEQ*/	{ 109, "illegal byte sequence"}
     69 	};
     70 	const char *p;
     71 	size_t len;
     72 	int i;
     73 
     74 	if (err < REG_ENOSYS || REG_ILLSEQ < err)
     75 	{
     76 		i = unk.index;
     77 		p = unk.str;
     78 	}
     79 	else
     80 	{
     81 		i = msgs[err - REG_ENOSYS].index;
     82 		p = msgs[err - REG_ENOSYS].str;
     83 	}
     84 /*	p = __gtxt(_str_uxlibc, i, p);	*/
     85 	len = strlen(p) + 1;
     86 	if (max != 0)
     87 	{
     88 		if (max > len)
     89 			max = len;
     90 		else if (max < len)
     91 			str[--max] = '\0';
     92 		memcpy(str, p, max);
     93 	}
     94 	return len;
     95 }