ltt/branches/poly/lttv/modules/gui/lttvwindow/lttvwindow/fnmatch.c

   1 /* Copyright (C) 1991, 1992, 1993 Free Software Foundation, Inc.
   2  *
   3  * This library is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU Lesser General Public
   5  * License as published by the Free Software Foundation; either
   6  * version 2 of the License, or (at your option) any later version.
   7  *
   8  * This library is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * Lesser General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU Lesser General Public
  14  * License along with this library; if not, write to the
  15  * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  16  * Boston, MA 02111-1307, USA.
  17  */
  18
  19 /*
  20  * Modified by the GTK+ Team and others 1997-2000.  See the AUTHORS
  21  * file for a list of people on the GTK+ Team.  See the ChangeLog
  22  * files for a list of changes.  These files are distributed with
  23  * GTK+ at ftp://ftp.gtk.org/pub/gtk/.
  24  */
  25
  26 /*
  27  * Stripped down, converted to UTF-8 and test cases added
  28  *
  29  *                    Owen Taylor, 13 December 2002;
  30  */
  31
  32 #include <config.h>
  33 #include <string.h>
  34
  35 #include <glib.h>
  36
  37 /* We need to make sure that all constants are defined
  38  * to properly compile this file
  39  */
  40 #ifndef _GNU_SOURCE
  41 #define _GNU_SOURCE
  42 #endif
  43
  44 static gunichar
  45 get_char (const char **str)
  46 {
  47   gunichar c = g_utf8_get_char (*str);
  48   *str = g_utf8_next_char (*str);
  49
  50 #ifdef G_PLATFORM_WIN32
  51   c = g_unichar_tolower (c);
  52 #endif
  53
  54   return c;
  55 }
  56
  57 #if defined(G_OS_WIN32) || defined(G_WITH_CYGWIN)
  58 #define DO_ESCAPE 0
  59 #else
  60 #define DO_ESCAPE 1
  61 #endif
  62
  63 static gunichar
  64 get_unescaped_char (const char **str,
  65                     gboolean    *was_escaped)
  66 {
  67   gunichar c = get_char (str);
  68
  69   *was_escaped = DO_ESCAPE && c == '\\';
  70   if (*was_escaped)
  71     c = get_char (str);
  72
  73   return c;
  74 }
  75
  76 /* Match STRING against the filename pattern PATTERN, returning zero if
  77    it matches, nonzero if not.  */
  78
  79 static gboolean
  80 gtk_fnmatch_intern (const char *pattern,
  81                     const char *string,
  82                     gboolean    component_start,
  83                     gboolean    no_leading_period)
  84 {
  85   const char *p = pattern, *n = string;
  86
  87   while (*p)
  88     {
  89       const char *last_n = n;
  90
  91       gunichar c = get_char (&p);
  92       gunichar nc = get_char (&n);
  93
  94       switch (c)
  95         {
  96         case '?':
  97           if (nc == '\0')
  98             return FALSE;
  99           else if (nc == G_DIR_SEPARATOR)
 100             return FALSE;
 101           else if (nc == '.' && component_start && no_leading_period)
 102             return FALSE;
 103           break;
 104         case '\\':
 105           if (DO_ESCAPE)
 106             c = get_char (&p);
 107           if (nc != c)
 108             return FALSE;
 109           break;
 110         case '*':
 111           if (nc == '.' && component_start && no_leading_period)
 112             return FALSE;
 113
 114           {
 115             const char *last_p = p;
 116
 117             for (last_p = p, c = get_char (&p);
 118                  c == '?' || c == '*';
 119                  last_p = p, c = get_char (&p))
 120               {
 121                 if (c == '?')
 122                   {
 123                     if (nc == '\0')
 124                       return FALSE;
 125                     else if (nc == G_DIR_SEPARATOR)
 126                       return FALSE;
 127                     else
 128                       {
 129                         last_n = n; nc = get_char (&n);
 130                       }
 131                   }
 132               }
 133
 134             /* If the pattern ends with wildcards, we have a
 135              * guaranteed match unless there is a dir separator
 136              * in the remainder of the string.
 137              */
 138             if (c == '\0')
 139               {
 140                 if (strchr (last_n, G_DIR_SEPARATOR) != NULL)
 141                   return FALSE;
 142                 else
 143                   return TRUE;
 144               }
 145
 146             if (DO_ESCAPE && c == '\\')
 147               c = get_char (&p);
 148
 149             for (p = last_p; nc != '\0';)
 150               {
 151                 if ((c == '[' || nc == c) &&
 152                     gtk_fnmatch_intern (p, last_n, component_start, no_leading_period))
 153                   return TRUE;
 154
 155                 component_start = (nc == G_DIR_SEPARATOR);
 156                 last_n = n;
 157                 nc = get_char (&n);
 158               }
 159
 160             return FALSE;
 161           }
 162
 163         case '[':
 164           {
 165             /* Nonzero if the sense of the character class is inverted.  */
 166             gboolean not;
 167             gboolean was_escaped;
 168
 169             if (nc == '\0' || nc == G_DIR_SEPARATOR)
 170               return FALSE;
 171
 172             if (nc == '.' && component_start && no_leading_period)
 173               return FALSE;
 174
 175             not = (*p == '!' || *p == '^');
 176             if (not)
 177               ++p;
 178
 179             c = get_unescaped_char (&p, &was_escaped);
 180             for (;;)
 181               {
 182                 register gunichar cstart = c, cend = c;
 183                 if (c == '\0')
 184                   /* [ (unterminated) loses.  */
 185                   return FALSE;
 186
 187                 c = get_unescaped_char (&p, &was_escaped);
 188
 189                 if (!was_escaped && c == '-' && *p != ']')
 190                   {
 191                     cend = get_unescaped_char (&p, &was_escaped);
 192                     if (cend == '\0')
 193                       return FALSE;
 194
 195                     c = get_char (&p);
 196                   }
 197
 198                 if (nc >= cstart && nc <= cend)
 199                   goto matched;
 200
 201                 if (!was_escaped && c == ']')
 202                   break;
 203               }
 204             if (!not)
 205               return FALSE;
 206             break;
 207
 208           matched:;
 209             /* Skip the rest of the [...] that already matched.  */
 210             /* XXX 1003.2d11 is unclear if was_escaped is right.  */
 211             while (was_escaped || c != ']')
 212               {
 213                 if (c == '\0')
 214                   /* [... (unterminated) loses.  */
 215                   return FALSE;
 216
 217                 c = get_unescaped_char (&p, &was_escaped);
 218               }
 219             if (not)
 220               return FALSE;
 221           }
 222           break;
 223
 224         default:
 225           if (c != nc)
 226             return FALSE;
 227         }
 228
 229       component_start = (nc == G_DIR_SEPARATOR);
 230     }
 231
 232   if (*n == '\0')
 233     return TRUE;
 234
 235   return FALSE;
 236 }
 237
 238 /* Match STRING against the filename pattern PATTERN, returning zero if
 239  *  it matches, nonzero if not.
 240  *
 241  * GTK+ used to use a old version of GNU fnmatch() that was buggy
 242  * in various ways and didn't handle UTF-8. The following is
 243  * converted to UTF-8. To simplify the process of making it
 244  * correct, this is special-cased to the combinations of flags
 245  * that gtkfilesel.c uses.
 246  *
 247  *   FNM_FILE_NAME   - always set
 248  *   FNM_LEADING_DIR - never set
 249  *   FNM_NOESCAPE    - set only on windows
 250  *   FNM_CASEFOLD    - set only on windows
 251  */
 252 gboolean
 253 _gtk_fnmatch (const char *pattern,
 254               const char *string,
 255               gboolean no_leading_period)
 256 {
 257   return gtk_fnmatch_intern (pattern, string, TRUE, no_leading_period);
 258 }
 259
 260 #undef FNMATCH_TEST_CASES
 261 #ifdef FNMATCH_TEST_CASES
 262
 263 #define TEST(pat, str, no_leading_period, result) \
 264   g_assert (_gtk_fnmatch ((pat), (str), (no_leading_period)) == result)
 265
 266 int main (int argc, char **argv)
 267 {
 268   TEST ("[a-]", "-", TRUE, TRUE);
 269
 270   TEST ("a", "a", TRUE, TRUE);
 271   TEST ("a", "b", TRUE, FALSE);
 272
 273   /* Test what ? matches */
 274   TEST ("?", "a", TRUE, TRUE);
 275   TEST ("?", ".", TRUE, FALSE);
 276   TEST ("a?", "a.", TRUE, TRUE);
 277   TEST ("a/?", "a/b", TRUE, TRUE);
 278   TEST ("a/?", "a/.", TRUE, FALSE);
 279   TEST ("?", "/", TRUE, FALSE);
 280
 281   /* Test what * matches */
 282   TEST ("*", "a", TRUE, TRUE);
 283   TEST ("*", ".", TRUE, FALSE);
 284   TEST ("a*", "a.", TRUE, TRUE);
 285   TEST ("a/*", "a/b", TRUE, TRUE);
 286   TEST ("a/*", "a/.", TRUE, FALSE);
 287   TEST ("*", "/", TRUE, FALSE);
 288
 289   /* Range tests */
 290   TEST ("[ab]", "a", TRUE, TRUE);
 291   TEST ("[ab]", "c", TRUE, FALSE);
 292   TEST ("[^ab]", "a", TRUE, FALSE);
 293   TEST ("[!ab]", "a", TRUE, FALSE);
 294   TEST ("[^ab]", "c", TRUE, TRUE);
 295   TEST ("[!ab]", "c", TRUE, TRUE);
 296   TEST ("[a-c]", "b", TRUE, TRUE);
 297   TEST ("[a-c]", "d", TRUE, FALSE);
 298   TEST ("[a-]", "-", TRUE, TRUE);
 299   TEST ("[]]", "]", TRUE, TRUE);
 300   TEST ("[^]]", "a", TRUE, TRUE);
 301   TEST ("[!]]", "a", TRUE, TRUE);
 302
 303   /* Various unclosed ranges */
 304   TEST ("[ab", "a", TRUE, FALSE);
 305   TEST ("[a-", "a", TRUE, FALSE);
 306   TEST ("[ab", "c", TRUE, FALSE);
 307   TEST ("[a-", "c", TRUE, FALSE);
 308   TEST ("[^]", "a", TRUE, FALSE);
 309
 310   /* Ranges and special no-wildcard matches */
 311   TEST ("[.]", ".", TRUE, FALSE);
 312   TEST ("a[.]", "a.", TRUE, TRUE);
 313   TEST ("a/[.]", "a/.", TRUE, FALSE);
 314   TEST ("[/]", "/", TRUE, FALSE);
 315   TEST ("[^/]", "a", TRUE, TRUE);
 316
 317   /* Basic tests of * (and combinations of * and ?) */
 318   TEST ("a*b", "ab", TRUE, TRUE);
 319   TEST ("a*b", "axb", TRUE, TRUE);
 320   TEST ("a*b", "axxb", TRUE, TRUE);
 321   TEST ("a**b", "ab", TRUE, TRUE);
 322   TEST ("a**b", "axb", TRUE, TRUE);
 323   TEST ("a**b", "axxb", TRUE, TRUE);
 324   TEST ("a*?*b", "ab", TRUE, FALSE);
 325   TEST ("a*?*b", "axb", TRUE, TRUE);
 326   TEST ("a*?*b", "axxb", TRUE, TRUE);
 327
 328   /* Test of  *[range] */
 329   TEST ("a*[cd]", "ac", TRUE, TRUE);
 330   TEST ("a*[cd]", "axc", TRUE, TRUE);
 331   TEST ("a*[cd]", "axx", TRUE, FALSE);
 332
 333   TEST ("a/[.]", "a/.", TRUE, FALSE);
 334   TEST ("a*[.]", "a/.", TRUE, FALSE);
 335
 336   /* Test of UTF-8 */
 337
 338   TEST ("ä", "ä", TRUE, TRUE);      /* TEST ("ä", "ä", TRUE); */
 339   TEST ("?", "ä", TRUE, TRUE);       /* TEST ("?", "ä", TRUE); */
 340   TEST ("*ö", "äö", TRUE, TRUE);   /* TEST ("*ö", "äö", TRUE); */
 341   TEST ("*ö", "ääö", TRUE, TRUE); /* TEST ("*ö", "ääö", TRUE); */
 342   TEST ("[ä]", "ä", TRUE, TRUE);    /* TEST ("[ä]", "ä", TRUE); */
 343   TEST ("[ä-ö]", "é", TRUE, TRUE); /* TEST ("[ä-ö]", "é", TRUE); */
 344   TEST ("[ä-ö]", "a", TRUE, FALSE); /* TEST ("[ä-ö]", "a", FALSE); */
 345
 346 #ifdef DO_ESCAPE
 347   /* Tests of escaping */
 348   TEST ("\\\\", "\\", TRUE, TRUE);
 349   TEST ("\\?", "?", TRUE, TRUE);
 350   TEST ("\\?", "a", TRUE, FALSE);
 351   TEST ("\\*", "*", TRUE, TRUE);
 352   TEST ("\\*", "a", TRUE, FALSE);
 353   TEST ("\\[a-b]", "[a-b]", TRUE, TRUE);
 354   TEST ("[\\\\]", "\\", TRUE, TRUE);
 355   TEST ("[\\^a]", "a", TRUE, TRUE);
 356   TEST ("[a\\-c]", "b", TRUE, FALSE);
 357   TEST ("[a\\-c]", "-", TRUE, TRUE);
 358   TEST ("[a\\]", "a", TRUE, FALSE);
 359 #endif /* DO_ESCAPE */
 360
 361   return 0;
 362 }
 363
 364 #endif /* FNMATCH_TEST_CASES */