regexp.c

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// SPDX-FileCopyrightText: 2008-2020 pancake <pancake@nopcode.org>
// SPDX-FileCopyrightText: 2008-2020 LemonBoy <thatlemon@gmail.com>
// SPDX-License-Identifier: LGPL-3.0-only
 
#include "rz_search.h"
#include <rz_regex.h>
 
RZ_API int rz_search_regexp_update(RzSearch *s, ut64 from, const ut8 *buf, int len) {
    RzSearchKeyword *kw;
    RzListIter *iter;
    RzRegexMatch match;
    RzRegex compiled = { 0 };
    const int old_nhits = s->nhits;
    int ret = 0;
 
    rz_list_foreach (s->kws, iter, kw) {
        int reflags = RZ_REGEX_EXTENDED;
 
        if (kw->icase) {
            reflags |= RZ_REGEX_ICASE;
        }
 
        if (rz_regex_comp(&compiled, (char *)kw->bin_keyword, reflags)) {
            eprintf("Cannot compile '%s' regexp\n", kw->bin_keyword);
            return -1;
        }
 
        match.rm_so = 0;
        match.rm_eo = len;
 
        while (!rz_regex_exec(&compiled, (char *)buf, 1, &match, RZ_REGEX_STARTEND)) {
            int t = rz_search_hit_new(s, kw, from + match.rm_so);
            if (!t) {
                ret = -1;
                goto beach;
            }
            if (t > 1) {
                goto beach;
            }
            /* Setup the boundaries for RZ_REGEX_STARTEND */
            match.rm_so = match.rm_eo;
            match.rm_eo = len;
        }
    }
 
beach:
    rz_regex_fini(&compiled);
    if (!ret) {
        ret = s->nhits - old_nhits;
    }
    return ret;
}