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/*
* pcre.c - interface to the PCRE library
*
* This file is part of zsh, the Z shell.
*
* Copyright (c) 2001, 2002, 2003, 2004 Clint Adams
* All rights reserved.
*
* Permission is hereby granted, without written agreement and without
* license or royalty fees, to use, copy, modify, and distribute this
* software and to distribute modified versions of this software for any
* purpose, provided that the above copyright notice and the following
* two paragraphs appear in all copies of this software.
*
* In no event shall Clint Adams or the Zsh Development Group be liable
* to any party for direct, indirect, special, incidental, or consequential
* damages arising out of the use of this software and its documentation,
* even if Andrew Main and the Zsh Development Group have been advised of
* the possibility of such damage.
*
* Clint Adams and the Zsh Development Group specifically disclaim any
* warranties, including, but not limited to, the implied warranties of
* merchantability and fitness for a particular purpose. The software
* provided hereunder is on an "as is" basis, and Andrew Main and the
* Zsh Development Group have no obligation to provide maintenance,
* support, updates, enhancements, or modifications.
*
*/
#include "pcre.mdh"
#include "pcre.pro"
#define CPCRE_PLAIN 0
/**/
#if defined(HAVE_PCRE_COMPILE) && defined(HAVE_PCRE_EXEC)
#include <pcre.h>
static pcre *pcre_pattern;
static pcre_extra *pcre_hints;
/**/
static int
bin_pcre_compile(char *nam, char **args, Options ops, UNUSED(int func))
{
int pcre_opts = 0, pcre_errptr;
const char *pcre_error;
if(OPT_ISSET(ops,'a')) pcre_opts |= PCRE_ANCHORED;
if(OPT_ISSET(ops,'i')) pcre_opts |= PCRE_CASELESS;
if(OPT_ISSET(ops,'m')) pcre_opts |= PCRE_MULTILINE;
if(OPT_ISSET(ops,'x')) pcre_opts |= PCRE_EXTENDED;
pcre_hints = NULL; /* Is this necessary? */
pcre_pattern = pcre_compile(*args, pcre_opts, &pcre_error, &pcre_errptr, NULL);
if (pcre_pattern == NULL)
{
zwarnnam(nam, "error in regex: %s", pcre_error);
return 1;
}
return 0;
}
/**/
#ifdef HAVE_PCRE_STUDY
/**/
static int
bin_pcre_study(char *nam, UNUSED(char **args), UNUSED(Options ops), UNUSED(int func))
{
const char *pcre_error;
if (pcre_pattern == NULL)
{
zwarnnam(nam, "no pattern has been compiled for study");
return 1;
}
pcre_hints = pcre_study(pcre_pattern, 0, &pcre_error);
if (pcre_error != NULL)
{
zwarnnam(nam, "error while studying regex: %s", pcre_error);
return 1;
}
return 0;
}
/**/
#else /* !HAVE_PCRE_STUDY */
# define bin_pcre_study bin_notavail
/**/
#endif /* !HAVE_PCRE_STUDY */
/**/
static int
zpcre_get_substrings(char *arg, int *ovec, int ret, char *receptacle)
{
char **captures, **matches;
if(!pcre_get_substring_list(arg, ovec, ret, (const char ***)&captures)) {
matches = zarrdup(&captures[1]); /* first one would be entire string */
if (receptacle == NULL)
setaparam("match", matches);
else
setaparam(receptacle, matches);
pcre_free_substring_list((const char **)captures);
}
return 0;
}
/**/
static int
bin_pcre_match(char *nam, char **args, Options ops, UNUSED(int func))
{
int ret, capcount, *ovec, ovecsize;
char *receptacle = NULL;
if(OPT_ISSET(ops,'a')) {
receptacle = *args++;
if(!*args) {
zwarnnam(nam, "not enough arguments");
return 1;
}
}
if ((ret = pcre_fullinfo(pcre_pattern, pcre_hints, PCRE_INFO_CAPTURECOUNT, &capcount)))
{
zwarnnam(nam, "error %d in fullinfo", ret);
return 1;
}
ovecsize = (capcount+1)*3;
ovec = zalloc(ovecsize*sizeof(int));
ret = pcre_exec(pcre_pattern, pcre_hints, *args, strlen(*args), 0, 0, ovec, ovecsize);
if (ret==0) return 0;
else if (ret==PCRE_ERROR_NOMATCH) return 1; /* no match */
else if (ret>0) {
zpcre_get_substrings(*args, ovec, ret, receptacle);
return 0;
}
else {
zwarnnam(nam, "error in pcre_exec");
return 1;
}
return 1;
}
/**/
static int
cond_pcre_match(char **a, int id)
{
pcre *pcre_pat;
const char *pcre_err;
char *lhstr, *rhre;
int r = 0, pcre_opts = 0, pcre_errptr, capcnt, *ov, ovsize;
lhstr = cond_str(a,0,0);
rhre = cond_str(a,1,0);
switch(id) {
case CPCRE_PLAIN:
pcre_pat = pcre_compile(rhre, pcre_opts, &pcre_err, &pcre_errptr, NULL);
pcre_fullinfo(pcre_pat, NULL, PCRE_INFO_CAPTURECOUNT, &capcnt);
ovsize = (capcnt+1)*3;
ov = zalloc(ovsize*sizeof(int));
r = pcre_exec(pcre_pat, NULL, lhstr, strlen(lhstr), 0, 0, ov, ovsize);
if (r==0) return 1;
else if (r==PCRE_ERROR_NOMATCH) return 0; /* no match */
else if (r>0) {
zpcre_get_substrings(lhstr, ov, r, NULL);
return 1;
}
break;
}
return 0;
}
static struct conddef cotab[] = {
CONDDEF("pcre-match", CONDF_INFIX, cond_pcre_match, 0, 0, CPCRE_PLAIN)
};
/**/
#else /* !(HAVE_PCRE_COMPILE && HAVE_PCRE_EXEC) */
# define bin_pcre_compile bin_notavail
# define bin_pcre_study bin_notavail
# define bin_pcre_match bin_notavail
/**/
#endif /* !(HAVE_PCRE_COMPILE && HAVE_PCRE_EXEC) */
static struct builtin bintab[] = {
BUILTIN("pcre_compile", 0, bin_pcre_compile, 1, 1, 0, "aimx", NULL),
BUILTIN("pcre_study", 0, bin_pcre_study, 0, 0, 0, NULL, NULL),
BUILTIN("pcre_match", 0, bin_pcre_match, 1, 2, 0, "a", NULL)
};
/**/
int
setup_(UNUSED(Module m))
{
return 0;
}
/**/
int
boot_(Module m)
{
#if defined(HAVE_PCRE_COMPILE) && defined(HAVE_PCRE_EXEC)
return !addbuiltins(m->nam, bintab, sizeof(bintab)/sizeof(*bintab)) ||
!addconddefs(m->nam, cotab, sizeof(cotab)/sizeof(*cotab));
#else /* !(HAVE_PCRE_COMPILE && HAVE_PCRE_EXEC) */
return !addbuiltins(m->nam, bintab, sizeof(bintab)/sizeof(*bintab));
#endif /* !(HAVE_PCRE_COMPILE && HAVE_PCRE_EXEC) */
}
/**/
int
cleanup_(Module m)
{
deletebuiltins(m->nam, bintab, sizeof(bintab)/sizeof(*bintab));
#if defined(HAVE_PCRE_COMPILE) && defined(HAVE_PCRE_EXEC)
deleteconddefs(m->nam, cotab, sizeof(cotab)/sizeof(*cotab));
#endif /* !(HAVE_PCRE_COMPILE && HAVE_PCRE_EXEC) */
return 0;
}
/**/
int
finish_(UNUSED(Module m))
{
return 0;
}
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