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138 lines
2.8 KiB
C
138 lines
2.8 KiB
C
/*
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* Copyright (c) 2000-2001 Sendmail, Inc. and its suppliers.
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* All rights reserved.
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*
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* By using this file, you agree to the terms and conditions set
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* forth in the LICENSE file which can be found at the top level of
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* the sendmail distribution.
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*
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*/
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#include <sm/gen.h>
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SM_RCSID("@(#)$Id: match.c,v 1.10 2001/09/11 04:04:48 gshapiro Exp $")
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#include <sm/string.h>
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/*
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** SM_MATCH -- Match a character string against a glob pattern.
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**
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** Parameters:
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** str -- string.
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** par -- pattern to find in str.
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**
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** Returns:
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** true on match, false on non-match.
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**
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** A pattern consists of normal characters, which match themselves,
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** and meta-sequences. A * matches any sequence of characters.
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** A ? matches any single character. A [ introduces a character class.
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** A ] marks the end of a character class; if the ] is missing then
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** the [ matches itself rather than introducing a character class.
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** A character class matches any of the characters between the brackets.
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** The range of characters from X to Y inclusive is written X-Y.
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** If the first character after the [ is ! then the character class is
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** complemented.
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**
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** To include a ] in a character class, make it the first character
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** listed (after the !, if any). To include a -, make it the first
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** character listed (after the !, if any) or the last character.
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** It is impossible for a ] to be the final character in a range.
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** For glob patterns that literally match "*", "?" or "[",
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** use [*], [?] or [[].
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*/
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bool
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sm_match(str, pat)
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const char *str;
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const char *pat;
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{
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bool ccnot, ccmatch, ccfirst;
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const char *ccstart;
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char c, c2;
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for (;;)
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{
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switch (*pat)
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{
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case '\0':
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return *str == '\0';
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case '?':
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if (*str == '\0')
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return false;
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++pat;
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++str;
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continue;
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case '*':
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++pat;
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if (*pat == '\0')
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{
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/* optimize case of trailing '*' */
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return true;
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}
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for (;;)
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{
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if (sm_match(pat, str))
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return true;
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if (*str == '\0')
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return false;
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++str;
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}
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/* NOTREACHED */
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case '[':
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ccstart = pat++;
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ccnot = false;
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if (*pat == '!')
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{
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ccnot = true;
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++pat;
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}
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ccmatch = false;
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ccfirst = true;
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for (;;)
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{
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if (*pat == '\0')
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{
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pat = ccstart;
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goto defl;
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}
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if (*pat == ']' && !ccfirst)
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break;
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c = *pat++;
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ccfirst = false;
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if (*pat == '-' && pat[1] != ']')
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{
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++pat;
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if (*pat == '\0')
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{
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pat = ccstart;
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goto defl;
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}
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c2 = *pat++;
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if (*str >= c && *str <= c2)
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ccmatch = true;
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}
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else
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{
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if (*str == c)
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ccmatch = true;
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}
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}
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if (ccmatch ^ ccnot)
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{
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++pat;
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++str;
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}
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else
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return false;
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continue;
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default:
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defl:
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if (*pat != *str)
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return false;
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++pat;
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++str;
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continue;
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}
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}
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}
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