mirror of git://anongit.mindrot.org/openssh.git
79 lines
1.9 KiB
C
79 lines
1.9 KiB
C
/*
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match.c
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Author: Tatu Ylonen <ylo@cs.hut.fi>
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Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
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All rights reserved
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Created: Thu Jun 22 01:17:50 1995 ylo
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Simple pattern matching, with '*' and '?' as wildcards.
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*/
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#include "includes.h"
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RCSID("$Id: match.c,v 1.1 1999/10/27 03:42:44 damien Exp $");
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#include "ssh.h"
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/* Returns true if the given string matches the pattern (which may contain
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? and * as wildcards), and zero if it does not match. */
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int match_pattern(const char *s, const char *pattern)
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{
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while (1)
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{
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/* If at end of pattern, accept if also at end of string. */
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if (!*pattern)
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return !*s;
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/* Process '*'. */
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if (*pattern == '*')
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{
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/* Skip the asterisk. */
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pattern++;
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/* If at end of pattern, accept immediately. */
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if (!*pattern)
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return 1;
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/* If next character in pattern is known, optimize. */
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if (*pattern != '?' && *pattern != '*')
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{
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/* Look instances of the next character in pattern, and try
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to match starting from those. */
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for (; *s; s++)
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if (*s == *pattern &&
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match_pattern(s + 1, pattern + 1))
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return 1;
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/* Failed. */
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return 0;
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}
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/* Move ahead one character at a time and try to match at each
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position. */
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for (; *s; s++)
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if (match_pattern(s, pattern))
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return 1;
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/* Failed. */
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return 0;
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}
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/* There must be at least one more character in the string. If we are
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at the end, fail. */
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if (!*s)
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return 0;
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/* Check if the next character of the string is acceptable. */
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if (*pattern != '?' && *pattern != *s)
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return 0;
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/* Move to the next character, both in string and in pattern. */
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s++;
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pattern++;
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}
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/*NOTREACHED*/
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}
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