b08153975c
and in several cases, code examples. Solves issue raised on fltk.general (12/30/09) by Alvin. git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@6986 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
128 lines
3.6 KiB
C++
128 lines
3.6 KiB
C++
//
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// "$Id$"
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//
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// Pattern matching routines for the Fast Light Tool Kit (FLTK).
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//
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// Copyright 1998-2009 by Bill Spitzak and others.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Library General Public
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// License as published by the Free Software Foundation; either
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// version 2 of the License, or (at your option) any later version.
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//
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// Library General Public License for more details.
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//
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// You should have received a copy of the GNU Library General Public
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// License along with this library; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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// USA.
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//
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// Please report all bugs and problems on the following page:
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//
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// http://www.fltk.org/str.php
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//
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/* Adapted from Rich Salz. */
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#include <FL/filename.H>
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#include <ctype.h>
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/**
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Checks if a string \p s matches a pattern \p p.
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The following syntax is used for the pattern:
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- * matches any sequence of 0 or more characters.
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- ? matches any single character.
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- [set] matches any character in the set. Set can contain any single characters, or a-z to represent a range.
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To match ] or - they must be the first characters. To match ^ or ! they must not be the first characters.
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- [^set] or [!set] matches any character not in the set.
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- {X|Y|Z} or {X,Y,Z} matches any one of the subexpressions literally.
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- \\x quotes the character x so it has no special meaning.
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- x all other characters must be matched exactly.
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\b Include:
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\code
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#include <FL/filename.H>
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\endcode
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\param[in] s the string to check for a match
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\param[in] p the string pattern
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\return non zero if the string matches the pattern
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*/
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int fl_filename_match(const char *s, const char *p) {
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int matched;
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for (;;) {
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switch(*p++) {
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case '?' : // match any single character
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if (!*s++) return 0;
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break;
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case '*' : // match 0-n of any characters
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if (!*p) return 1; // do trailing * quickly
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while (!fl_filename_match(s, p)) if (!*s++) return 0;
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return 1;
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case '[': { // match one character in set of form [abc-d] or [^a-b]
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if (!*s) return 0;
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int reverse = (*p=='^' || *p=='!'); if (reverse) p++;
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matched = 0;
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char last = 0;
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while (*p) {
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if (*p=='-' && last) {
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if (*s <= *++p && *s >= last ) matched = 1;
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last = 0;
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} else {
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if (*s == *p) matched = 1;
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}
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last = *p++;
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if (*p==']') break;
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}
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if (matched == reverse) return 0;
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s++; p++;}
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break;
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case '{' : // {pattern1|pattern2|pattern3}
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NEXTCASE:
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if (fl_filename_match(s,p)) return 1;
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for (matched = 0;;) {
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switch (*p++) {
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case '\\': if (*p) p++; break;
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case '{': matched++; break;
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case '}': if (!matched--) return 0; break;
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case '|': case ',': if (matched==0) goto NEXTCASE;
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case 0: return 0;
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}
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}
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case '|': // skip rest of |pattern|pattern} when called recursively
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case ',':
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for (matched = 0; *p && matched >= 0;) {
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switch (*p++) {
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case '\\': if (*p) p++; break;
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case '{': matched++; break;
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case '}': matched--; break;
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}
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}
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break;
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case '}':
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break;
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case 0: // end of pattern
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return !*s;
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case '\\': // quote next character
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if (*p) p++;
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default:
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if (tolower(*s) != tolower(*(p-1))) return 0;
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s++;
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break;
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}
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}
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}
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//
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// End of "$Id$".
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//
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