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/*
make_pcre - PCRE plugin for GNU make.
Copyright (C) 2014 Dmitry Mikhirev
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdio.h>
#include <string.h>
#include <gnumake.h>
#include <pcre.h>
int plugin_is_GPL_compatible;
const int MAX_CAP = 256;
char *match(const char *name, int argc, char **argv)
{
char *pat = NULL;
char *p;
int co = 0;
pcre *re;
const char *err;
int erroffset;
char *str = NULL;
int ncap = 0;
int ovec[MAX_CAP*3];
char *retstr = NULL;
int i;
if (argc > 2) {
for (p = argv[2]; *p != '\0'; p++) {
switch (*p) {
case 'E':
pat = gmk_expand(argv[0]);
break;
case 'i':
co |= PCRE_CASELESS;
break;
case 'm':
co |= PCRE_MULTILINE;
break;
case 's':
co |= PCRE_DOTALL;
break;
case 'u':
co |= PCRE_UCP;
break;
case 'U':
co |= PCRE_UNGREEDY;
break;
case 'x':
co |= PCRE_EXTENDED;
break;
case 'X':
co |= PCRE_EXTRA;
break;
case '8':
co |= PCRE_UTF8;
break;
default:
fprintf(stderr, "%s: unknown option `%c'\n",
name, *p);
break;
}
}
}
if (pat == NULL) {
re = pcre_compile(argv[0], 0, &err, &erroffset, NULL);
} else {
re = pcre_compile(pat, 0, &err, &erroffset, NULL);
gmk_free(pat);
}
if (re == NULL) {
fprintf(stderr, "%s: %d: %s\n", name, erroffset, err);
goto end_match;
}
str = gmk_expand(argv[1]);
ncap = pcre_exec(re, NULL, str, strlen(str), 0, 0, ovec, MAX_CAP*3);
pcre_free(re);
end_match:
if (ncap) {
int len = ovec[1] - ovec[0];
retstr = gmk_alloc(len + 1);
strncpy(retstr, str + ovec[0], len);
retstr[len] = '\0';
}
for (i = 0; i < ncap; i++) {
char c = *(str + ovec[i*2 + 1]);
*(str + ovec[i*2 + 1]) = '\0';
int len = ovec[i*2 + 1] - ovec[i];
char mk_set[len + 18];
sprintf(mk_set, "define %d\n%s\nendef\n", i, str + ovec[i*2]);
*(str + ovec[i*2 + 1]) = c;
gmk_eval(mk_set, NULL);
}
for (; i < MAX_CAP; i++) {
char mk_set[14];
sprintf(mk_set, "undefine %d\n", i);
gmk_eval(mk_set, NULL);
}
if (str != NULL) {
gmk_free(str);
}
return retstr;
}
int pcre_gmk_setup()
{
gmk_add_function("pcre_find", (gmk_func_ptr)match, 2, 3, GMK_FUNC_NOEXPAND);
gmk_add_function("m", (gmk_func_ptr)match, 2, 3, GMK_FUNC_NOEXPAND);
return 1;
}
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