66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
/* NetHack 3.7 cppregex.cpp */
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/* $NHDT-Date: 1596498279 2020/08/03 23:44:39 $ $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.9 $ */
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/* Copyright (c) Sean Hunt 2015. */
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/* NetHack may be freely redistributed. See license for details. */
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#include <regex>
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#include <memory>
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/* nhregex interface documented in sys/share/posixregex.c */
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extern "C" {
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#include <hack.h>
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extern const char regex_id[] = "cppregex";
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static char *cppregex_static_buffer = (char *) 0;
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struct nhregex {
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std::unique_ptr<std::regex> re;
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std::unique_ptr<std::regex_error> err;
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};
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struct nhregex *regex_init(void) {
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return new nhregex;
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}
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boolean regex_compile(const char *s, struct nhregex *re) {
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if (!re)
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return FALSE;
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try {
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re->re.reset(new std::regex(s, (std::regex::extended
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| std::regex::nosubs
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| std::regex::optimize)));
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re->err.reset(nullptr);
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return TRUE;
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} catch (const std::regex_error& err) {
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re->err.reset(new std::regex_error(err));
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re->re.reset(nullptr);
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return FALSE;
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}
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}
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const char *regex_error_desc(struct nhregex *re) {
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if (re->err) {
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if (cppregex_static_buffer != 0)
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free(cppregex_static_buffer);
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cppregex_static_buffer = dupstr(re->err->what());
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return cppregex_static_buffer;
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} else
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return nullptr;
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}
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boolean regex_match(const char *s, struct nhregex *re) {
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if (!re->re)
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return false;
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try {
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return regex_search(s, *re->re, std::regex_constants::match_any);
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} catch (const std::regex_error& err) {
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return false;
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}
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}
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void regex_free(struct nhregex *re) {
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delete re;
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}
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}
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