68 lines
1.5 KiB
C
68 lines
1.5 KiB
C
/* NetHack 3.7 pmatchregex.c $NHDT-Date: 1596498285 2020/08/03 23:44:45 $ $NHDT-Branch: NetHack-3.7 $:$NHDT-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 "hack.h"
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/* Implementation of the regex engine using pmatch().
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* [Switched to pmatchi() so as to ignore case.]
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*
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* This is a fallback ONLY and should be avoided where possible, as it results
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* in regexes not behaving as POSIX extended regular expressions. As a result,
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* configuration files for NetHacks built with this engine will not be
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* portable to ones built with an alternate regex engine.
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*/
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const char regex_id[] = "pmatchregex";
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struct nhregex {
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const char *pat;
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};
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struct nhregex *
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regex_init(void)
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{
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struct nhregex *re;
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re = (struct nhregex *) alloc(sizeof (struct nhregex));
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re->pat = (const char *) 0;
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return re;
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}
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boolean
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regex_compile(const char *s, struct nhregex *re)
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{
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if (!re)
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return FALSE;
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if (re->pat)
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free((genericptr_t) re->pat);
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re->pat = dupstr(s);
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return TRUE;
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}
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const char *
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regex_error_desc(struct nhregex *re UNUSED)
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{
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return "pattern match compilation error";
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}
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boolean
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regex_match(const char *s, struct nhregex *re)
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{
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if (!re || !re->pat || !s)
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return FALSE;
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return pmatchi(re->pat, s);
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}
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void
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regex_free(struct nhregex *re)
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{
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if (re) {
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if (re->pat)
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free((genericptr_t) re->pat);
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free((genericptr_t) re);
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}
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}
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