regerror.c
上传用户:nvosite88
上传日期:2007-01-17
资源大小:4983k
文件大小:7k
- /* regerror.c - regular expression handling */
- /*
- modification history
- --------------------
- 01e,13apr98,wmd changed name of regerror to wtxRegError.
- 01d,30sep96,elp put in share, adapted to be compiled on target side
- (SPR# 6775).
- 01c,10jul96,pad undefined redefinition of malloc (AIX specific).
- 01b,20mar95,p_m moved #include "host.h" on top of includes list, this is
- necessary on Windows platforms.
- changed #include <regex.h> to #include "regex.h".
- 01a,10jan95,jcf created.
- */
- /*
- DESCRIPTION
- This library is *not* the original BSD distribution. Though the changes
- were completely cosmetic (file naming, and such), the user of this library
- is forewarned.
- AUTHOR: Henry Spencer
- */
- /*-
- * Copyright (c) 1992, 1993, 1994 Henry Spencer.
- * Copyright (c) 1992, 1993, 1994
- * The Regents of the University of California. All rights reserved.
- *
- * This code is derived from software contributed to Berkeley by
- * Henry Spencer.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- *
- * @(#)regerror.c 8.4 (Berkeley) 3/20/94
- */
- #if defined(LIBC_SCCS) && !defined(lint)
- static char sccsid[] = "@(#)regerror.c 8.4 (Berkeley) 3/20/94";
- #endif /* LIBC_SCCS and not lint */
- #ifdef HOST
- #include "host.h"
- #if defined(RS6000_AIX4) || defined (RS6000_AIX3)
- #undef malloc
- #endif
- #include <sys/types.h>
- #include <stdio.h>
- #include <string.h>
- #include <ctype.h>
- #include <limits.h>
- #include <stdlib.h>
- #else
- #include "vxWorks.h"
- #include "stdio.h"
- #include "string.h"
- #include "ctype.h"
- #include "limits.h"
- #include "stdlib.h"
- #endif /* HOST */
- #include "regex.h"
- #include "regex2.h"
- /* ========= begin header generated by ./mkh ========= */
- #ifdef __cplusplus
- extern "C" {
- #endif
- /* === regerror.c === */
- static char *regatoi __P((const regex_t *preg, char *localbuf));
- #ifdef __cplusplus
- }
- #endif
- /* ========= end header generated by ./mkh ========= */
- /*
- = #define REG_NOMATCH 1
- = #define REG_BADPAT 2
- = #define REG_ECOLLATE 3
- = #define REG_ECTYPE 4
- = #define REG_EESCAPE 5
- = #define REG_ESUBREG 6
- = #define REG_EBRACK 7
- = #define REG_EPAREN 8
- = #define REG_EBRACE 9
- = #define REG_BADBR 10
- = #define REG_ERANGE 11
- = #define REG_ESPACE 12
- = #define REG_BADRPT 13
- = #define REG_EMPTY 14
- = #define REG_ASSERT 15
- = #define REG_INVARG 16
- = #define REG_ATOI 255 // convert name to number (!)
- = #define REG_ITOA 0400 // convert number to name (!)
- */
- static struct rerr {
- int code;
- char *name;
- char *explain;
- } rerrs[] = {
- {REG_NOMATCH, "REG_NOMATCH", "regexec() failed to match"},
- {REG_BADPAT, "REG_BADPAT", "invalid regular expression"},
- {REG_ECOLLATE, "REG_ECOLLATE", "invalid collating element"},
- {REG_ECTYPE, "REG_ECTYPE", "invalid character class"},
- {REG_EESCAPE, "REG_EESCAPE", "trailing backslash (\)"},
- {REG_ESUBREG, "REG_ESUBREG", "invalid backreference number"},
- {REG_EBRACK, "REG_EBRACK", "brackets ([ ]) not balanced"},
- {REG_EPAREN, "REG_EPAREN", "parentheses not balanced"},
- {REG_EBRACE, "REG_EBRACE", "braces not balanced"},
- {REG_BADBR, "REG_BADBR", "invalid repetition count(s)"},
- {REG_ERANGE, "REG_ERANGE", "invalid character range"},
- {REG_ESPACE, "REG_ESPACE", "out of memory"},
- {REG_BADRPT, "REG_BADRPT", "repetition-operator operand invalid"},
- {REG_EMPTY, "REG_EMPTY", "empty (sub)expression"},
- {REG_ASSERT, "REG_ASSERT", ""can't happen" -- you found a bug"},
- {REG_INVARG, "REG_INVARG", "invalid argument to regex routine"},
- {0, "", "*** unknown regexp error code ***"}
- };
- /*
- - regerror - the interface to error numbers
- = extern size_t regerror(int, const regex_t *, char *, size_t);
- */
- /* ARGSUSED */
- size_t
- #ifdef HOST
- wtxRegError(errcode, preg, errbuf, errbuf_size)
- #else
- regerror(errcode, preg, errbuf, errbuf_size)
- #endif /* HOST */
- int errcode;
- const regex_t *preg;
- char *errbuf;
- size_t errbuf_size;
- {
- register struct rerr *r;
- register size_t len;
- register int target = errcode &~ REG_ITOA;
- register char *s;
- char convbuf[50];
- if (errcode == REG_ATOI)
- s = regatoi(preg, convbuf);
- else {
- for (r = rerrs; r->code != 0; r++)
- if (r->code == target)
- break;
-
- if (errcode®_ITOA) {
- if (r->code != 0)
- (void) strcpy(convbuf, r->name);
- else
- sprintf(convbuf, "REG_0x%x", target);
- assert(strlen(convbuf) < sizeof(convbuf));
- s = convbuf;
- } else
- s = r->explain;
- }
- len = strlen(s) + 1;
- if (errbuf_size > 0) {
- if (errbuf_size > len)
- (void) strcpy(errbuf, s);
- else {
- (void) strncpy(errbuf, s, errbuf_size-1);
- errbuf[errbuf_size-1] = ' ';
- }
- }
- return(len);
- }
- /*
- - regatoi - internal routine to implement REG_ATOI
- == static char *regatoi(const regex_t *preg, char *localbuf);
- */
- static char *
- regatoi(preg, localbuf)
- const regex_t *preg;
- char *localbuf;
- {
- register struct rerr *r;
- /* register size_t siz; XXX jcf: not used */
- /* register char *p; XXX jcf: not used */
- for (r = rerrs; r->code != 0; r++)
- if (strcmp(r->name, preg->re_endp) == 0)
- break;
- if (r->code == 0)
- return("0");
- sprintf(localbuf, "%d", r->code);
- return(localbuf);
- }