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         /*
  66          * Edit pattern with user-defined rules
  67          */
  68         if (font && config && !FcConfigSubstituteWithPat (config, font, NULL, FcMatchScan))
  69         {
  70             FcPatternDestroy (font);
  71             font = NULL;
  72             ret = FcFalse;
  73         }
  74
  75         /*
  76          * Add the font
  77          */
  78         if (font && (!config || FcConfigAcceptFont (config, font)))
  79         {
  80             if (FcDebug() & FC_DBG_SCANV)
  81             {
  82                 printf ("Final font pattern:\n");
  83                 FcPatternPrint (font);
  84             }
  85             if (!FcFontSetAdd (set, font))
  86             {
  87                 FcPatternDestroy (font);
  88                 font = NULL;
  89                 ret = FcFalse;
  90             }
  91         }
  92         else if (font)
  93             FcPatternDestroy (font);
  94         id++;
  95     } while (font && ret && id < count);
  96     return ret;
  97 }
  98
  99 FcBool
 100 FcFileScanConfig (FcFontSet     *set,
 101                   FcStrSet      *dirs,
 102                   FcBlanks      *blanks,
 103                   const FcChar8 *file,
 104                   FcConfig      *config)
 105 {
 106     if (FcFileIsDir (file))
 107         return FcStrSetAdd (dirs, file);
 108     else
 109         return FcFileScanFontConfig (set, blanks, file, config);
 110 }
 111
 112 FcBool
 113 FcFileScan (FcFontSet       *set,
 114             FcStrSet        *dirs,
 115             FcFileCache     *cache, /* XXX unused */
 116             FcBlanks        *blanks,
 117             const FcChar8   *file,
 118             FcBool          force)
 119 {
 120     return FcFileScanConfig (set, dirs, blanks, file, NULL);
 121 }
 122
 123 /*
 124  * Strcmp helper that takes pointers to pointers, copied from qsort(3) manpage
 125  */
 126 static int
 127 cmpstringp(const void *p1, const void *p2)
 128 {
 129     return strcmp(* (char **) p1, * (char **) p2);
 130 }
 131
 132 /*
 133  * Scan the specified directory and construct a cache of its contents
 134  */
 135 FcCache *
 136 FcDirCacheScan (const FcChar8 *dir, FcConfig *config)
 137 {
 138     DIR                 *d;
 139     struct dirent       *e;
 140     FcStrSet            *files;
 141     FcStrSet            *dirs;
 142     FcChar8             *file;
 143     FcChar8             *base;
 144     FcBool              ret = FcTrue;
 145     FcFontSet           *set;
 146     int                 i;
 147     FcBlanks            *blanks = FcConfigGetBlanks (config);
 148     FcCache             *cache = NULL;
 149     struct stat         dir_stat;
 150
 151     if (FcDebug () & FC_DBG_FONTSET)
 152         printf ("cache scan dir %s\n", dir);
 153
 154     /* freed below */
 155     file = (FcChar8 *) malloc (strlen ((char *) dir) + 1 + FC_MAX_FILE_LEN + 1);
 156     if (!file) {
 157         ret = FcFalse;
 158         goto bail;
 159     }
 160
 161     strcpy ((char *) file, (char *) dir);
 162     strcat ((char *) file, "/");
 163     base = file + strlen ((char *) file);
 164
 165     if (FcDebug () & FC_DBG_SCAN)
 166         printf ("\tScanning dir %s\n", dir);
 167
 168     d = opendir ((char *) dir);
 169     if (!d)
 170     {
 171         /* Don't complain about missing directories */
 172         if (errno == ENOENT)
 173             ret = FcTrue;
 174         else
 175             ret = FcFalse;
 176         goto bail_1;
 177     }
 178     if (stat ((char *) dir, &dir_stat) < 0)
 179     {
 180         ret = FcFalse;
 181         goto bail_1;
 182     }
 183
 184     set = FcFontSetCreate();
 185     if (!set)
 186     {
 187         ret = FcFalse;
 188         goto bail0;
 189     }
 190
 191     files = FcStrSetCreate ();
 192     if (!files)
 193     {
 194         ret = FcFalse;
 195         goto bail1;
 196     }
 197     while ((e = readdir (d)))
 198     {
 199         if (e->d_name[0] != '.' && strlen (e->d_name) < FC_MAX_FILE_LEN)
 200         {
 201             strcpy ((char *) base, (char *) e->d_name);
 202             if (!FcStrSetAdd (files, file)) {
 203                 ret = FcFalse;
 204                 goto bail2;
 205             }
 206         }
 207     }
 208
 209     /*
 210      * Sort files to make things prettier
 211      */
 212     qsort(files->strs, files->num, sizeof(FcChar8 *), cmpstringp);
 213
 214     dirs = FcStrSetCreate ();
 215     if (!dirs)
 216         goto bail2;
 217
 218     /*
 219      * Scan file files to build font patterns
 220      */
 221     for (i = 0; i < files->num; i++)
 222         FcFileScanConfig (set, dirs, blanks, files->strs[i], config);
 223
 224     /*
 225      * Build the cache object
 226      */
 227     cache = FcDirCacheBuild (set, dir, &dir_stat, dirs);
 228     if (!cache)
 229         goto bail3;
 230
 231     /*
 232      * Write out the cache file, ignoring any troubles
 233      */
 234     FcDirCacheWrite (cache, config);
 235
 236  bail3:
 237     FcStrSetDestroy (dirs);
 238  bail2:
 239     FcStrSetDestroy (files);
 240  bail1:
 241     FcFontSetDestroy (set);
 242
 243  bail0:
 244     closedir (d);
 245
 246  bail_1:
 247     free (file);
 248  bail:
 249     return cache;
 250 }
 251
 252 /*
 253  * Read (or construct) the cache for a directory
 254  */
 255 FcCache *
 256 FcDirCacheRead (const FcChar8 *dir, FcBool force, FcConfig *config)
 257 {
 258     FcCache             *cache = NULL;
 259
 260     if (config && !FcConfigAcceptFilename (config, dir))
 261         return NULL;
 262
 263     /* Try to use existing cache file */
 264     if (!force)
 265         cache = FcDirCacheLoad (dir, config, NULL);
 266
 267     /* Not using existing cache file, construct new cache */
 268     if (!cache)
 269         cache = FcDirCacheScan (dir, config);
 270
 271     return cache;
 272 }
 273
 274 FcBool
 275 FcDirScanConfig (FcFontSet      *set,
 276                  FcStrSet       *dirs,
 277                  FcBlanks       *blanks,
 278                  const FcChar8  *dir,
 279                  FcBool         force,
 280                  FcConfig       *config)
 281 {
 282     return FcFalse; /* XXX deprecated */
 283 }
 284
 285 FcBool
 286 FcDirScan (FcFontSet        *set,
 287            FcStrSet         *dirs,
 288            FcFileCache      *cache, /* XXX unused */
 289            FcBlanks         *blanks,
 290            const FcChar8    *dir,
 291            FcBool           force)
 292 {
 293     return FcFalse; /* XXX deprecated */
 294 }
 295
 296 FcBool
 297 FcDirSave (FcFontSet *set, FcStrSet * dirs, const FcChar8 *dir)
 298 {
 299     return FcFalse; /* XXX deprecated */
 300 }
 301 #define __fcdir__
 302 #include "fcaliastail.h"
 303 #undef __fcdir__