RE.c++
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- /* $Id: RE.c++,v 1.3 2008/12/08 21:14:33 faxguy Exp $ */
- /*
- * Copyright (c) 1994-1996 Sam Leffler
- * Copyright (c) 1994-1996 Silicon Graphics, Inc.
- * HylaFAX is a trademark of Silicon Graphics
- *
- * Permission to use, copy, modify, distribute, and sell this software and
- * its documentation for any purpose is hereby granted without fee, provided
- * that (i) the above copyright notices and this permission notice appear in
- * all copies of the software and related documentation, and (ii) the names of
- * Sam Leffler and Silicon Graphics may not be used in any advertising or
- * publicity relating to the software without the specific, prior written
- * permission of Sam Leffler and Silicon Graphics.
- *
- * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
- * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
- * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
- *
- * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR
- * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND,
- * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
- * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF
- * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
- * OF THIS SOFTWARE.
- */
- /*
- * Regular expression support.
- */
- #include "RE.h"
- RE::RE(const char* pat, int len, int flags)
- : _pattern(pat, len == 0 ? strlen(pat) : len)
- {
- init(flags);
- }
- RE::RE(const fxStr& pat, int flags) : _pattern(pat)
- {
- init(flags);
- }
- RE::RE(const RE& other, int flags)
- : fxObj(other)
- , _pattern(other._pattern)
- {
- init(flags);
- }
- RE::~RE()
- {
- regfree(&c_pattern);
- delete [] matches;
- }
- void
- RE::init(int flags)
- {
- memset(&c_pattern, 0, sizeof(c_pattern));
- compResult = regcomp(&c_pattern, _pattern, flags);
- if (compResult == 0) {
- matches = new regmatch_t[c_pattern.re_nsub+1];
- execResult = REG_NOMATCH;
- } else {
- matches = NULL;
- execResult = compResult;
- }
- }
- bool
- RE::Find(const char* text, u_int length, u_int off)
- {
- if (compResult == 0) {
- /*
- * These two checks are for compatibility with the old
- * InterViews code; yech (but the DialRules logic needs it).
- */
- if (((off || length) && off >= length) || (off && _pattern[0] == '^'))
- execResult = REG_NOMATCH;
- else {
- matches[0].rm_so = off;
- matches[0].rm_eo = length;
- execResult = regexec(&c_pattern, text, c_pattern.re_nsub+1,
- matches, REG_STARTEND);
- }
- }
- return (execResult == 0);
- }
- void
- RE::getError(fxStr& emsg) const
- {
- char buf[1024];
- (void) regerror(execResult, &c_pattern, buf, sizeof (buf));
- emsg = buf;
- }
- int
- RE::StartOfMatch(u_int ix) const
- {
- if (execResult != 0)
- return (execResult);
- return (ix <= c_pattern.re_nsub ? matches[ix].rm_so : -1);
- }
- int
- RE::EndOfMatch(u_int ix) const
- {
- if (execResult != 0)
- return (execResult);
- return (ix <= c_pattern.re_nsub ? matches[ix].rm_eo : -1);
- }
- REPtr::~REPtr() { destroy(); }
- void REPtr::destroy() { if (p) p->dec(); }
- REPtr&
- REPtr::operator=(const REPtr& other)
- {
- if (p != other.p) {
- destroy();
- p = other.p ? (other.p->inc(),other.p) : 0;
- }
- return *this;
- }
- REPtr&
- REPtr::operator=(RE* tp)
- {
- if (p != tp) {
- destroy();
- p = tp ? (tp->inc(),tp) : 0;
- }
- return *this;
- }