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
 150     if (FcDebug () & FC_DBG_FONTSET)
 151         printf ("cache scan dir %s\n", dir);
 152
 153     /* freed below */
 154     file = (FcChar8 *) malloc (strlen ((char *) dir) + 1 + FC_MAX_FILE_LEN + 1);
 155     if (!file) {
 156         ret = FcFalse;
 157         goto bail;
 158     }
 159
 160     strcpy ((char *) file, (char *) dir);
 161     strcat ((char *) file, "/");
 162     base = file + strlen ((char *) file);
 163
 164     if (FcDebug () & FC_DBG_SCAN)
 165         printf ("\tScanning dir %s\n", dir);
 166
 167     d = opendir ((char *) dir);
 168     if (!d)
 169     {
 170         /* Don't complain about missing directories */
 171         if (errno == ENOENT)
 172             ret = FcTrue;
 173         else
 174             ret = FcFalse;
 175         goto bail_1;
 176     }
 177
 178     set = FcFontSetCreate();
 179     if (!set)
 180     {
 181         ret = FcFalse;
 182         goto bail0;
 183     }
 184
 185     files = FcStrSetCreate ();
 186     if (!files)
 187     {
 188         ret = FcFalse;
 189         goto bail1;
 190     }
 191     while ((e = readdir (d)))
 192     {
 193         if (e->d_name[0] != '.' && strlen (e->d_name) < FC_MAX_FILE_LEN)
 194         {
 195             strcpy ((char *) base, (char *) e->d_name);
 196             if (!FcStrSetAdd (files, file)) {
 197                 ret = FcFalse;
 198                 goto bail2;
 199             }
 200         }
 201     }
 202
 203     /*
 204      * Sort files to make things prettier
 205      */
 206     qsort(files->strs, files->num, sizeof(FcChar8 *), cmpstringp);
 207
 208     dirs = FcStrSetCreate ();
 209     if (!dirs)
 210         goto bail2;
 211
 212     /*
 213      * Scan file files to build font patterns
 214      */
 215     for (i = 0; i < files->num; i++)
 216         FcFileScanConfig (set, dirs, blanks, files->strs[i], config);
 217
 218     /*
 219      * Build the cache object
 220      */
 221     cache = FcDirCacheBuild (set, dir, dirs);
 222     if (!cache)
 223         goto bail3;
 224
 225     /*
 226      * Write out the cache file, ignoring any troubles
 227      */
 228     FcDirCacheWrite (cache, config);
 229
 230  bail3:
 231     FcStrSetDestroy (dirs);
 232  bail2:
 233     FcStrSetDestroy (files);
 234  bail1:
 235     FcFontSetDestroy (set);
 236
 237  bail0:
 238     closedir (d);
 239
 240  bail_1:
 241     free (file);
 242  bail:
 243     return cache;
 244 }
 245
 246 /*
 247  * Read (or construct) the cache for a directory
 248  */
 249 FcCache *
 250 FcDirCacheRead (const FcChar8 *dir, FcBool force, FcConfig *config)
 251 {
 252     FcCache             *cache = NULL;
 253
 254     if (config && !FcConfigAcceptFilename (config, dir))
 255         return NULL;
 256
 257     /* Try to use existing cache file */
 258     if (!force)
 259         cache = FcDirCacheLoad (dir, config, NULL);
 260
 261     /* Not using existing cache file, construct new cache */
 262     if (!cache)
 263         cache = FcDirCacheScan (dir, config);
 264
 265     return cache;
 266 }
 267
 268 FcBool
 269 FcDirScanConfig (FcFontSet      *set,
 270                  FcStrSet       *dirs,
 271                  FcBlanks       *blanks,
 272                  const FcChar8  *dir,
 273                  FcBool         force,
 274                  FcConfig       *config)
 275 {
 276     return FcFalse; /* XXX deprecated */
 277 }
 278
 279 FcBool
 280 FcDirScan (FcFontSet        *set,
 281            FcStrSet         *dirs,
 282            FcFileCache      *cache, /* XXX unused */
 283            FcBlanks         *blanks,
 284            const FcChar8    *dir,
 285            FcBool           force)
 286 {
 287     return FcFalse; /* XXX deprecated */
 288 }
 289
 290 FcBool
 291 FcDirSave (FcFontSet *set, FcStrSet * dirs, const FcChar8 *dir)
 292 {
 293     return FcFalse; /* XXX deprecated */
 294 }
 295 #define __fcdir__
 296 #include "fcaliastail.h"
 297 #undef __fcdir__