regfronts.c
上传用户:rrhhcc
上传日期:2015-12-11
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文件大小:2k
- /*
- * regcomp and regexec - front ends to re_ routines
- *
- * Mostly for implementation of backward-compatibility kludges. Note
- * that these routines exist ONLY in char versions.
- *
- * Copyright (c) 1998, 1999 Henry Spencer. All rights reserved.
- *
- * Development of this software was funded, in part, by Cray Research Inc.,
- * UUNET Communications Services Inc., Sun Microsystems Inc., and Scriptics
- * Corporation, none of whom are responsible for the results. The author
- * thanks all of them.
- *
- * Redistribution and use in source and binary forms -- with or without
- * modification -- are permitted for any purpose, provided that
- * redistributions in source form retain this entire copyright notice and
- * indicate the origin and nature of any modifications.
- *
- * I'd appreciate being given credit for this package in the documentation
- * of software which uses it, but that is not a requirement.
- *
- * THIS SOFTWARE IS PROVIDED ``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
- * HENRY SPENCER 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.
- *
- */
- #include "regguts.h"
- /*
- - regcomp - compile regular expression
- */
- int
- regcomp(re, str, flags)
- regex_t *re;
- CONST char *str;
- int flags;
- {
- size_t len;
- int f = flags;
- if (f®_PEND) {
- len = re->re_endp - str;
- f &= ~REG_PEND;
- } else
- len = strlen(str);
- return re_comp(re, str, len, f);
- }
- /*
- - regexec - execute regular expression
- */
- int
- regexec(re, str, nmatch, pmatch, flags)
- regex_t *re;
- CONST char *str;
- size_t nmatch;
- regmatch_t pmatch[];
- int flags;
- {
- CONST char *start;
- size_t len;
- int f = flags;
- if (f®_STARTEND) {
- start = str + pmatch[0].rm_so;
- len = pmatch[0].rm_eo - pmatch[0].rm_so;
- f &= ~REG_STARTEND;
- } else {
- start = str;
- len = strlen(str);
- }
- return re_exec(re, start, len, nmatch, pmatch, f);
- }