fc-cat/fc-cat.c

   1 /*
   2  * $RCSId: xc/lib/fontconfig/fc-cache/fc-cache.c,v 1.8tsi Exp $
   3  *
   4  * Copyright © 2002 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 #ifdef HAVE_CONFIG_H
  26 #include <config.h>
  27 #else
  28 #ifdef linux
  29 #define HAVE_GETOPT_LONG 1
  30 #endif
  31 #define HAVE_GETOPT 1
  32 #endif
  33
  34 #include <fontconfig/fontconfig.h>
  35 #include <../src/fccache.c>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <unistd.h>
  39 #include <sys/types.h>
  40 #include <sys/stat.h>
  41 #include <errno.h>
  42
  43 #ifndef HAVE_GETOPT
  44 #define HAVE_GETOPT 0
  45 #endif
  46 #ifndef HAVE_GETOPT_LONG
  47 #define HAVE_GETOPT_LONG 0
  48 #endif
  49
  50 #if HAVE_GETOPT_LONG
  51 #undef  _GNU_SOURCE
  52 #define _GNU_SOURCE
  53 #include <getopt.h>
  54 const struct option longopts[] = {
  55     {"version", 0, 0, 'V'},
  56     {"verbose", 0, 0, 'v'},
  57     {"help", 0, 0, '?'},
  58     {NULL,0,0,0},
  59 };
  60 #else
  61 #if HAVE_GETOPT
  62 extern char *optarg;
  63 extern int optind, opterr, optopt;
  64 #endif
  65 #endif
  66
  67 /*
  68  * POSIX has broken stdio so that getc must do thread-safe locking,
  69  * this is a serious performance problem for applications doing large
  70  * amounts of IO with getc (as is done here).  If available, use
  71  * the getc_unlocked varient instead.
  72  */
  73
  74 #if defined(getc_unlocked) || defined(_IO_getc_unlocked)
  75 #define GETC(f) getc_unlocked(f)
  76 #define PUTC(c,f) putc_unlocked(c,f)
  77 #else
  78 #define GETC(f) getc(f)
  79 #define PUTC(c,f) putc(c,f)
  80 #endif
  81
  82 FcBool
  83 FcCachePrintSet (FcFontSet *set, FcStrSet *dirs, char *base_name);
  84
  85 static FcBool
  86 FcCacheWriteChars (FILE *f, const FcChar8 *chars)
  87 {
  88     FcChar8    c;
  89     while ((c = *chars++))
  90     {
  91         switch (c) {
  92         case '"':
  93         case '\\':
  94             if (PUTC ('\\', f) == EOF)
  95                 return FcFalse;
  96             /* fall through */
  97         default:
  98             if (PUTC (c, f) == EOF)
  99                 return FcFalse;
 100         }
 101     }
 102     return FcTrue;
 103 }
 104
 105 static FcBool
 106 FcCacheWriteUlong (FILE *f, unsigned long t)
 107 {
 108     int     pow;
 109     unsigned long   temp, digit;
 110
 111     temp = t;
 112     pow = 1;
 113     while (temp >= 10)
 114     {
 115         temp /= 10;
 116         pow *= 10;
 117     }
 118     temp = t;
 119     while (pow)
 120     {
 121         digit = temp / pow;
 122         if (PUTC ((char) digit + '0', f) == EOF)
 123             return FcFalse;
 124         temp = temp - pow * digit;
 125         pow = pow / 10;
 126     }
 127     return FcTrue;
 128 }
 129
 130 static FcBool
 131 FcCacheWriteInt (FILE *f, int i)
 132 {
 133     return FcCacheWriteUlong (f, (unsigned long) i);
 134 }
 135
 136 static FcBool
 137 FcCacheWriteStringOld (FILE *f, const FcChar8 *string)
 138 {
 139
 140     if (PUTC ('"', f) == EOF)
 141         return FcFalse;
 142     if (!FcCacheWriteChars (f, string))
 143         return FcFalse;
 144     if (PUTC ('"', f) == EOF)
 145         return FcFalse;
 146     return FcTrue;
 147 }
 148
 149 static void
 150 usage (char *program)
 151 {
 152 #if HAVE_GETOPT_LONG
 153     fprintf (stderr, "usage: %s [-V?] [--version] [--help] <fonts.cache-2>\n",
 154              program);
 155 #else
 156     fprintf (stderr, "usage: %s [-fsvV?] <fonts.cache-2>\n",
 157              program);
 158 #endif
 159     fprintf (stderr, "Reads font information caches in <fonts.cache-2>\n");
 160     fprintf (stderr, "\n");
 161 #if HAVE_GETOPT_LONG
 162     fprintf (stderr, "  -V, --version        display font config version and exit\n");
 163     fprintf (stderr, "  -?, --help           display this help and exit\n");
 164 #else
 165     fprintf (stderr, "  -V         (version) display font config version and exit\n");
 166     fprintf (stderr, "  -?         (help)    display this help and exit\n");
 167 #endif
 168     exit (1);
 169 }
 170
 171 static int
 172 FcCacheFileOpen (char *cache_file, off_t *size)
 173 {
 174     int fd;
 175     struct stat file_stat;
 176
 177     fd = open(cache_file, O_RDONLY | O_BINARY);
 178     if (fd < 0)
 179         return -1;
 180
 181     if (fstat (fd, &file_stat) < 0) {
 182         close (fd);
 183         return -1;
 184     }
 185     *size = file_stat.st_size;
 186     return fd;
 187 }
 188
 189 /*
 190  * return the path from the directory containing 'cache' to 'file'
 191  */
 192
 193 static const FcChar8 *
 194 FcFileBaseName (const char *cache, const FcChar8 *file)
 195 {
 196     const FcChar8   *cache_slash;
 197     int             cache_len = strlen (cache);
 198
 199     if (!strncmp (cache, file, cache_len) && file[cache_len] == '/')
 200         return file + cache_len + 1;
 201     return file;
 202 }
 203
 204 FcBool
 205 FcCachePrintSet (FcFontSet *set, FcStrSet *dirs, char *base_name)
 206 {
 207     FcPattern       *font;
 208     FcChar8         *name, *dir;
 209     const FcChar8   *file, *base;
 210     int             ret;
 211     int             n;
 212     int             id;
 213     FcStrList       *list;
 214
 215     list = FcStrListCreate (dirs);
 216     if (!list)
 217         goto bail2;
 218
 219     while ((dir = FcStrListNext (list)))
 220     {
 221         base = FcFileBaseName (base_name, dir);
 222         if (!FcCacheWriteStringOld (stdout, base))
 223             goto bail3;
 224         if (PUTC (' ', stdout) == EOF)
 225             goto bail3;
 226         if (!FcCacheWriteInt (stdout, 0))
 227             goto bail3;
 228         if (PUTC (' ', stdout) == EOF)
 229             goto bail3;
 230         if (!FcCacheWriteStringOld (stdout, FC_FONT_FILE_DIR))
 231             goto bail3;
 232         if (PUTC ('\n', stdout) == EOF)
 233             goto bail3;
 234     }
 235
 236     for (n = 0; n < set->nfont; n++)
 237     {
 238         FcPattern   **fonts = FcFontSetFonts (set);
 239         FcPattern   *encoded_font = fonts[n];
 240         FcPattern   *font = FcEncodedOffsetToPtr (set, encoded_font, FcPattern);
 241
 242         if (FcPatternGetString (font, FC_FILE, 0, (FcChar8 **) &file) != FcResultMatch)
 243             goto bail3;
 244         base = FcFileBaseName (base_name, file);
 245         if (FcPatternGetInteger (font, FC_INDEX, 0, &id) != FcResultMatch)
 246             goto bail3;
 247         if (!FcCacheWriteStringOld (stdout, base))
 248             goto bail3;
 249         if (PUTC (' ', stdout) == EOF)
 250             goto bail3;
 251         if (!FcCacheWriteInt (stdout, id))
 252             goto bail3;
 253         if (PUTC (' ', stdout) == EOF)
 254             goto bail3;
 255         name = FcNameUnparse (font);
 256         if (!name)
 257             goto bail3;
 258         ret = FcCacheWriteStringOld (stdout, name);
 259         FcStrFree (name);
 260         if (!ret)
 261             goto bail3;
 262         if (PUTC ('\n', stdout) == EOF)
 263             goto bail3;
 264     }
 265
 266     FcStrListDone (list);
 267
 268     return FcTrue;
 269
 270 bail3:
 271     FcStrListDone (list);
 272 bail2:
 273     return FcFalse;
 274 }
 275
 276 FcCache *
 277 FcCacheFileMap (const FcChar8 *file)
 278 {
 279     FcCache *cache;
 280     int     fd;
 281     struct stat file_stat;
 282
 283     fd = open (file, O_RDONLY | O_BINARY);
 284     if (fd < 0)
 285         return NULL;
 286     if (fstat (fd, &file_stat) < 0) {
 287         close (fd);
 288         return NULL;
 289     }
 290     if (FcCacheLoad (fd, file_stat.st_size, &cache)) {
 291         close (fd);
 292         return cache;
 293     }
 294     close (fd);
 295     return NULL;
 296 }
 297
 298 int
 299 main (int argc, char **argv)
 300 {
 301     int         i;
 302     int         ret = 0;
 303     FcFontSet   *fs;
 304     FcStrSet    *dirs;
 305     FcCache     *cache;
 306     FcConfig    *config;
 307     int         verbose = 0;
 308 #if HAVE_GETOPT_LONG || HAVE_GETOPT
 309     int         c;
 310
 311 #if HAVE_GETOPT_LONG
 312     while ((c = getopt_long (argc, argv, "Vv?", longopts, NULL)) != -1)
 313 #else
 314     while ((c = getopt (argc, argv, "Vv?")) != -1)
 315 #endif
 316     {
 317         switch (c) {
 318         case 'V':
 319             fprintf (stderr, "fontconfig version %d.%d.%d\n",
 320                      FC_MAJOR, FC_MINOR, FC_REVISION);
 321             exit (0);
 322         case 'v':
 323             verbose++;
 324             break;
 325         default:
 326             usage (argv[0]);
 327         }
 328     }
 329     i = optind;
 330 #else
 331     i = 1;
 332 #endif
 333
 334     config = FcInitLoadConfig ();
 335     if (!config)
 336     {
 337         fprintf (stderr, "%s: Can't init font config library\n", argv[0]);
 338         return 1;
 339     }
 340     FcConfigSetCurrent (config);
 341
 342     if (i >= argc)
 343         usage (argv[0]);
 344
 345     for (; i < argc; i++)
 346     {
 347         int     j;
 348         off_t   size;
 349         intptr_t        *cache_dirs;
 350
 351         if (FcFileIsDir ((const FcChar8 *)argv[i]))
 352             cache = FcDirCacheMap ((const FcChar8 *) argv[i], config);
 353         else
 354             cache = FcCacheFileMap (argv[i]);
 355         if (!cache)
 356         {
 357             perror (argv[i]);
 358             ret++;
 359             continue;
 360         }
 361
 362         dirs = FcStrSetCreate ();
 363         fs = FcCacheSet (cache);
 364         cache_dirs = FcCacheDirs (cache);
 365         for (j = 0; j < cache->dirs_count; j++)
 366             FcStrSetAdd (dirs, FcOffsetToPtr (cache_dirs,
 367                                               cache_dirs[j],
 368                                               FcChar8));
 369
 370         if (verbose)
 371             printf ("Name: %s\nDirectory: %s\n", argv[i], FcCacheDir(cache));
 372         FcCachePrintSet (fs, dirs, FcCacheDir (cache));
 373
 374         FcStrSetDestroy (dirs);
 375
 376         FcDirCacheUnmap (cache);
 377     }
 378
 379     return 0;
 380 }