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- /* File-name wildcard pattern matching for GNU.
- Copyright (C) 1985, 1988, 1989, 1990 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 1, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /* To whomever it may concern: I have never seen the code which most
- Unix programs use to perform this function. I wrote this from scratch
- based on specifications for the pattern matching. --RMS. */
-
- static int glob_match_after_star ();
-
- /* Return nonzero if PATTERN has any special globbing chars in it. */
-
- int
- glob_pattern_p (pattern)
- char *pattern;
- {
- register char *p = pattern;
- register char c;
-
- while ((c = *p++) != '\0')
- switch (c)
- {
- case '?':
- case '[':
- case '*':
- return 1;
-
- case '\\':
- if (*p++ == '\0')
- return 0;
- }
-
- return 0;
- }
-
-
- /* Match the pattern PATTERN against the string TEXT;
- return 1 if it matches, 0 otherwise.
-
- A match means the entire string TEXT is used up in matching.
-
- In the pattern string, `*' matches any sequence of characters,
- `?' matches any character, [SET] matches any character in the specified set,
- [!SET] matches any character not in the specified set.
-
- A set is composed of characters or ranges; a range looks like
- character hyphen character (as in 0-9 or A-Z).
- [0-9a-zA-Z_] is the set of characters allowed in C identifiers.
- Any other character in the pattern must be matched exactly.
-
- To suppress the special syntactic significance of any of `[]*?!-\',
- and match the character exactly, precede it with a `\'.
-
- If DOT_SPECIAL is nonzero,
- `*' and `?' do not match `.' at the beginning of TEXT. */
-
- int
- glob_match (pattern, text, dot_special)
- char *pattern, *text;
- int dot_special;
- {
- register char *p = pattern, *t = text;
- register char c;
-
- while ((c = *p++) != '\0')
- switch (c)
- {
- case '?':
- if (*t == '\0' || (dot_special && t == text && *t == '.'))
- return 0;
- else
- ++t;
- break;
-
- case '\\':
- if (*p++ != *t++)
- return 0;
- break;
-
- case '*':
- if (dot_special && t == text && *t == '.')
- return 0;
- return glob_match_after_star (p, t);
-
- case '[':
- {
- register char c1 = *t++;
- int invert;
-
- if (c1 == '\0')
- return 0;
-
- invert = (*p == '!');
-
- if (invert)
- p++;
-
- c = *p++;
- while (1)
- {
- register char cstart = c, cend = c;
-
- if (c == '\\')
- {
- cstart = *p++;
- cend = cstart;
- }
-
- if (cstart == '\0')
- return 0; /* Missing ']'. */
-
- c = *p++;
-
- if (c == '-')
- {
- cend = *p++;
- if (cend == '\\')
- cend = *p++;
- if (cend == '\0')
- return 0;
- c = *p++;
- }
- if (c1 >= cstart && c1 <= cend)
- goto match;
- if (c == ']')
- break;
- }
- if (!invert)
- return 0;
- break;
-
- match:
- /* Skip the rest of the [...] construct that already matched. */
- while (c != ']')
- {
- if (c == '\0')
- return 0;
- c = *p++;
- if (c == '\0')
- return 0;
- if (c == '\\')
- p++;
- }
- if (invert)
- return 0;
- break;
- }
-
- default:
- if (c != *t++)
- return 0;
- }
-
- return *t == '\0';
- }
-
- /* Like glob_match, but match PATTERN against any final segment of TEXT. */
-
- static int
- glob_match_after_star (pattern, text)
- char *pattern, *text;
- {
- register char *p = pattern, *t = text;
- register char c, c1;
-
- while ((c = *p++) == '?' || c == '*')
- if (c == '?' && *t++ == '\0')
- return 0;
-
- if (c == '\0')
- return 1;
-
- if (c == '\\')
- c1 = *p;
- else
- c1 = c;
-
- --p;
- while (1)
- {
- if ((c == '[' || *t == c1) && glob_match (p, t, 0))
- return 1;
- if (*t++ == '\0')
- return 0;
- }
- }
-