src/fcdir.c

   1 /*
   2  * $RCSId: xc/lib/fontconfig/src/fcdir.c,v 1.9 2002/08/31 22:17:32 keithp Exp $
   3  *
   4  * Copyright © 2000 Keith Packard
   5  *
   6  * Permission to use, copy, modify, distribute, and sell this software and its
   7  * documentation for any purpose is hereby granted without fee, provided that
   8  * the above copyright notice appear in all copies and that both that
   9  * copyright notice and this permission notice appear in supporting
  10  * documentation, and that the name of Keith Packard not be used in
  11  * advertising or publicity pertaining to distribution of the software without
  12  * specific, written prior permission.  Keith Packard makes no
  13  * representations about the suitability of this software for any purpose.  It
  14  * is provided "as is" without express or implied warranty.
  15  *
  16  * KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  17  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  18  * EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  19  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  20  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  21  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
  22  * PERFORMANCE OF THIS SOFTWARE.
  23  */
  24
  25 #include "fcint.h"
  26 #include <dirent.h>
  27
  28 FcBool
  29 FcFileIsDir (const FcChar8 *file)
  30 {
  31     struct stat     statb;
  32
  33     if (stat ((const char *) file, &statb) != 0)
  34         return FcFalse;
  35     return S_ISDIR(statb.st_mode);
  36 }
  37
  38 static FcBool
  39 FcFileScanFontConfig (FcFontSet         *set,
  40                       FcBlanks          *blanks,
  41                       const FcChar8     *file,
  42                       FcConfig          *config)
  43 {
  44     FcPattern   *font;
  45     FcBool      ret = FcTrue;
  46     int         id;
  47     int         count = 0;
  48
  49     id = 0;
  50     do
  51     {
  52         font = 0;
  53         /*
  54          * Nothing in the cache, scan the file
  55          */
  56         if (FcDebug () & FC_DBG_SCAN)
  57         {
  58             printf ("\tScanning file %s...", file);
  59             fflush (stdout);
  60         }
  61         font = FcFreeTypeQuery (file, id, blanks, &count);
  62         if (FcDebug () & FC_DBG_SCAN)
  63             printf ("done\n");
  64         /*
  65          * Add the font
  66          */
  67         if (font && (!config || FcConfigAcceptFont (config, font)))
  68         {
  69             if (!FcFontSetAdd (set, font))
  70             {
  71                 FcPatternDestroy (font);
  72                 font = 0;
  73                 ret = FcFalse;
  74             }
  75         }
  76         else if (font)
  77             FcPatternDestroy (font);
  78         id++;
  79     } while (font && ret && id < count);
  80     return ret;
  81 }
  82
  83 FcBool
  84 FcFileScanConfig (FcFontSet     *set,
  85                   FcStrSet      *dirs,
  86                   FcBlanks      *blanks,
  87                   const FcChar8 *file,
  88                   FcConfig      *config)
  89 {
  90     if (FcFileIsDir (file))
  91         return FcStrSetAdd (dirs, file);
  92     else
  93         return FcFileScanFontConfig (set, blanks, file, config);
  94 }
  95
  96 FcBool
  97 FcFileScan (FcFontSet       *set,
  98             FcStrSet        *dirs,
  99             FcFileCache     *cache, /* XXX unused */
 100             FcBlanks        *blanks,
 101             const FcChar8   *file,
 102             FcBool          force)
 103 {
 104     return FcFileScanConfig (set, dirs, blanks, file, NULL);
 105 }
 106
 107 /*
 108  * Strcmp helper that takes pointers to pointers, copied from qsort(3) manpage
 109  */
 110 static int
 111 cmpstringp(const void *p1, const void *p2)
 112 {
 113     return strcmp(* (char **) p1, * (char **) p2);
 114 }
 115
 116 /*
 117  * Scan the specified directory and construct a cache of its contents
 118  */
 119 FcCache *
 120 FcDirCacheScan (const FcChar8 *dir, FcConfig *config)
 121 {
 122     DIR                 *d;
 123     struct dirent       *e;
 124     FcStrSet            *files;
 125     FcStrSet            *dirs;
 126     FcChar8             *file;
 127     FcChar8             *base;
 128     FcBool              ret = FcTrue;
 129     FcFontSet           *set;
 130     int                 i;
 131     FcBlanks            *blanks = FcConfigGetBlanks (config);
 132     FcCache             *cache = NULL;
 133
 134     if (FcDebug () & FC_DBG_FONTSET)
 135         printf ("cache scan dir %s\n", dir);
 136
 137     /* freed below */
 138     file = (FcChar8 *) malloc (strlen ((char *) dir) + 1 + FC_MAX_FILE_LEN + 1);
 139     if (!file) {
 140         ret = FcFalse;
 141         goto bail;
 142     }
 143
 144     strcpy ((char *) file, (char *) dir);
 145     strcat ((char *) file, "/");
 146     base = file + strlen ((char *) file);
 147
 148     if (FcDebug () & FC_DBG_SCAN)
 149         printf ("\tScanning dir %s\n", dir);
 150
 151     d = opendir ((char *) dir);
 152     if (!d)
 153     {
 154         /* Don't complain about missing directories */
 155         if (errno == ENOENT)
 156             ret = FcTrue;
 157         else
 158             ret = FcFalse;
 159         goto bail_1;
 160     }
 161
 162     set = FcFontSetCreate();
 163     if (!set)
 164     {
 165         ret = FcFalse;
 166         goto bail0;
 167     }
 168
 169     files = FcStrSetCreate ();
 170     if (!files)
 171     {
 172         ret = FcFalse;
 173         goto bail1;
 174     }
 175     while ((e = readdir (d)))
 176     {
 177         if (e->d_name[0] != '.' && strlen (e->d_name) < FC_MAX_FILE_LEN)
 178         {
 179             strcpy ((char *) base, (char *) e->d_name);
 180             if (!FcStrSetAdd (files, file)) {
 181                 ret = FcFalse;
 182                 goto bail2;
 183             }
 184         }
 185     }
 186
 187     /*
 188      * Sort files to make things prettier
 189      */
 190     qsort(files->strs, files->num, sizeof(FcChar8 *), cmpstringp);
 191
 192     dirs = FcStrSetCreate ();
 193     if (!dirs)
 194         goto bail2;
 195
 196     /*
 197      * Scan file files to build font patterns
 198      */
 199     for (i = 0; i < files->num; i++)
 200         FcFileScanConfig (set, dirs, blanks, files->strs[i], config);
 201
 202     /*
 203      * Build the cache object
 204      */
 205     cache = FcDirCacheBuild (set, dir, dirs);
 206     if (!cache)
 207         goto bail3;
 208
 209     /*
 210      * Write out the cache file, ignoring any troubles
 211      */
 212     FcDirCacheWrite (cache, config);
 213
 214  bail3:
 215     FcStrSetDestroy (dirs);
 216  bail2:
 217     FcStrSetDestroy (files);
 218  bail1:
 219     FcFontSetDestroy (set);
 220
 221  bail0:
 222     closedir (d);
 223
 224  bail_1:
 225     free (file);
 226  bail:
 227     return cache;
 228 }
 229
 230 /*
 231  * Read (or construct) the cache for a directory
 232  */
 233 FcCache *
 234 FcDirCacheRead (const FcChar8 *dir, FcBool force, FcConfig *config)
 235 {
 236     FcCache             *cache = NULL;
 237
 238     if (config && !FcConfigAcceptFilename (config, dir))
 239         return NULL;
 240
 241     /* Try to use existing cache file */
 242     if (!force)
 243         cache = FcDirCacheLoad (dir, config, NULL);
 244
 245     /* Not using existing cache file, construct new cache */
 246     if (!cache)
 247         cache = FcDirCacheScan (dir, config);
 248
 249     return cache;
 250 }
 251
 252 FcBool
 253 FcDirScanConfig (FcFontSet      *set,
 254                  FcStrSet       *dirs,
 255                  FcBlanks       *blanks,
 256                  const FcChar8  *dir,
 257                  FcBool         force,
 258                  FcConfig       *config)
 259 {
 260     return FcFalse; /* XXX fixme */
 261 }
 262
 263 FcBool
 264 FcDirScan (FcFontSet        *set,
 265            FcStrSet         *dirs,
 266            FcFileCache      *cache, /* XXX unused */
 267            FcBlanks         *blanks,
 268            const FcChar8    *dir,
 269            FcBool           force)
 270 {
 271     return FcDirScanConfig (set, dirs, blanks, dir, force, NULL);
 272 }
 273
 274 FcBool
 275 FcDirSave (FcFontSet *set, FcStrSet * dirs, const FcChar8 *dir)
 276 {
 277     return FcFalse; /* XXX deprecated */
 278 }