b86ad06d6b
The intent is to look for platform-specific facilities for regex matching, to provide portable MENUCOLORS configuration files. This is a prototype implementation being committed to see if Windows can use the POSIX regex implementation provided with the C++11 standard library. If this works, I will write a harness for POSIX regexes and for pmatch(), and those can be linked in by platforms as appropriate. pmatch() should be used only as a very last resort, because it breaks compatibility between platforms.
52 lines
1.3 KiB
C++
52 lines
1.3 KiB
C++
/* NetHack 3.5 cppregex.cpp $NHDT-Date$ $NHDT-Branch$:$NHDT-Revision$ */
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/* NetHack 3.5 cppregex.cpp $Date: 2009/05/06 10:44:33 $ $Revision: 1.4 $ */
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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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extern "C" {
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#include <nhregex.h>
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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 | std::regex::nosubs | 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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return re->err->what();
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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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return regex_search(s, *re->re, std::regex_constants::match_any);
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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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