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 #include <fontconfig/fontconfig.h>
  26 #include <../src/fccache.c>
  27 #include <stdio.h>
  28 #include <stdlib.h>
  29 #include <unistd.h>
  30 #include <libgen.h>
  31 #include <sys/types.h>
  32 #include <sys/stat.h>
  33 #include <errno.h>
  34 #ifdef HAVE_CONFIG_H
  35 #include <config.h>
  36 #else
  37 #ifdef linux
  38 #define HAVE_GETOPT_LONG 1
  39 #endif
  40 #define HAVE_GETOPT 1
  41 #endif
  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     {"help", 0, 0, '?'},
  57     {NULL,0,0,0},
  58 };
  59 #else
  60 #if HAVE_GETOPT
  61 extern char *optarg;
  62 extern int optind, opterr, optopt;
  63 #endif
  64 #endif
  65
  66 /*
  67  * POSIX has broken stdio so that getc must do thread-safe locking,
  68  * this is a serious performance problem for applications doing large
  69  * amounts of IO with getc (as is done here).  If available, use
  70  * the getc_unlocked varient instead.
  71  */
  72
  73 #if defined(getc_unlocked) || defined(_IO_getc_unlocked)
  74 #define GETC(f) getc_unlocked(f)
  75 #define PUTC(c,f) putc_unlocked(c,f)
  76 #else
  77 #define GETC(f) getc(f)
  78 #define PUTC(c,f) putc(c,f)
  79 #endif
  80
  81 FcBool
  82 FcCachePrintSet (FcFontSet *set, FcStrSet *dirs, char *base_name);
  83
  84 static FcBool
  85 FcCacheWriteChars (FILE *f, const FcChar8 *chars)
  86 {
  87     FcChar8    c;
  88     while ((c = *chars++))
  89     {
  90         switch (c) {
  91         case '"':
  92         case '\\':
  93             if (PUTC ('\\', f) == EOF)
  94                 return FcFalse;
  95             /* fall through */
  96         default:
  97             if (PUTC (c, f) == EOF)
  98                 return FcFalse;
  99         }
 100     }
 101     return FcTrue;
 102 }
 103
 104 static FcBool
 105 FcCacheWriteUlong (FILE *f, unsigned long t)
 106 {
 107     int     pow;
 108     unsigned long   temp, digit;
 109
 110     temp = t;
 111     pow = 1;
 112     while (temp >= 10)
 113     {
 114         temp /= 10;
 115         pow *= 10;
 116     }
 117     temp = t;
 118     while (pow)
 119     {
 120         digit = temp / pow;
 121         if (PUTC ((char) digit + '0', f) == EOF)
 122             return FcFalse;
 123         temp = temp - pow * digit;
 124         pow = pow / 10;
 125     }
 126     return FcTrue;
 127 }
 128
 129 static FcBool
 130 FcCacheWriteInt (FILE *f, int i)
 131 {
 132     return FcCacheWriteUlong (f, (unsigned long) i);
 133 }
 134
 135 static FcBool
 136 FcCacheWriteStringOld (FILE *f, const FcChar8 *string)
 137 {
 138
 139     if (PUTC ('"', f) == EOF)
 140         return FcFalse;
 141     if (!FcCacheWriteChars (f, string))
 142         return FcFalse;
 143     if (PUTC ('"', f) == EOF)
 144         return FcFalse;
 145     return FcTrue;
 146 }
 147
 148 static void
 149 usage (char *program)
 150 {
 151 #if HAVE_GETOPT_LONG
 152     fprintf (stderr, "usage: %s [-V?] [--version] [--help] <fonts.cache-2>\n",
 153              program);
 154 #else
 155     fprintf (stderr, "usage: %s [-fsvV?] <fonts.cache-2>\n",
 156              program);
 157 #endif
 158     fprintf (stderr, "Reads font information caches in <fonts.cache-2>\n");
 159     fprintf (stderr, "\n");
 160 #if HAVE_GETOPT_LONG
 161     fprintf (stderr, "  -V, --version        display font config version and exit\n");
 162     fprintf (stderr, "  -?, --help           display this help and exit\n");
 163 #else
 164     fprintf (stderr, "  -V         (version) display font config version and exit\n");
 165     fprintf (stderr, "  -?         (help)    display this help and exit\n");
 166 #endif
 167     exit (1);
 168 }
 169
 170 static FcBool
 171 FcCacheGlobalFileReadAndPrint (FcFontSet * set, FcStrSet *dirs, char *cache_file)
 172 {
 173     char                name_buf[8192];
 174     int fd;
 175     char * current_arch_machine_name;
 176     char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE];
 177     char                subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1];
 178     off_t current_arch_start = 0;
 179
 180     if (!cache_file)
 181         goto bail;
 182
 183     current_arch_machine_name = FcCacheMachineSignature();
 184     fd = open(cache_file, O_RDONLY);
 185     if (fd == -1)
 186         goto bail;
 187
 188     current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
 189     if (current_arch_start < 0)
 190         goto bail1;
 191
 192     lseek (fd, current_arch_start, SEEK_SET);
 193     if (FcCacheReadString (fd, candidate_arch_machine_name,
 194                            sizeof (candidate_arch_machine_name)) == 0)
 195         goto bail1;
 196
 197     while (1)
 198     {
 199         char * dir;
 200         FcCacheReadString (fd, name_buf, sizeof (name_buf));
 201         if (!strlen(name_buf))
 202             break;
 203         printf ("fc-cat: printing global cache contents for dir %s\n",
 204                 name_buf);
 205
 206         do
 207         {
 208             if (!FcCacheReadString (fd, subdirName,
 209                                     sizeof (subdirName)) ||
 210                 !strlen (subdirName))
 211                 break;
 212             /* then don't do anything with subdirName. */
 213         } while (1);
 214
 215         if (!FcDirCacheConsume (fd, name_buf, set, 0))
 216             goto bail1;
 217
 218         dir = malloc (strlen (name_buf) + 2);
 219         if (!dir)
 220             goto bail1;
 221
 222         strcpy (dir, name_buf);
 223         strcat (dir, "/");
 224
 225         FcCachePrintSet (set, dirs, dir);
 226         free (dir);
 227
 228         FcFontSetDestroy (set);
 229         set = FcFontSetCreate();
 230     }
 231
 232  bail1:
 233     close (fd);
 234  bail:
 235     return FcFalse;
 236 }
 237
 238 /* read serialized state from the cache file */
 239 static char *
 240 FcCacheFileRead (FcFontSet * set, FcStrSet *dirs, char *cache_file)
 241 {
 242     int fd;
 243     char * current_arch_machine_name;
 244     off_t current_arch_start = 0;
 245     char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1];
 246     static char name_buf[8192], *dir;
 247     FcChar8 * ls;
 248
 249     if (!cache_file)
 250         goto bail;
 251
 252     current_arch_machine_name = FcCacheMachineSignature();
 253     fd = open(cache_file, O_RDONLY);
 254     if (fd == -1)
 255         goto bail;
 256
 257     FcCacheReadString (fd, name_buf, sizeof (name_buf));
 258     if (!strlen (name_buf))
 259         goto bail;
 260     if (strcmp (name_buf, FC_GLOBAL_MAGIC_COOKIE) == 0)
 261         goto bail;
 262     printf ("fc-cat: printing directory cache for cache which would be named %s\n",
 263             name_buf);
 264
 265     current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
 266     if (current_arch_start < 0)
 267         goto bail1;
 268
 269     while (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0)
 270         FcStrSetAdd (dirs, (FcChar8 *)subdirName);
 271
 272     dir = strdup(name_buf);
 273     ls = FcStrLastSlash ((FcChar8 *)dir);
 274     if (ls)
 275         *ls = 0;
 276
 277     if (!FcDirCacheConsume (fd, dir, set, 0))
 278         goto bail2;
 279     free (dir);
 280
 281     close(fd);
 282     return name_buf;
 283
 284  bail2:
 285     free (dir);
 286
 287  bail1:
 288     close (fd);
 289  bail:
 290     return 0;
 291 }
 292
 293 /*
 294  * return the path from the directory containing 'cache' to 'file'
 295  */
 296
 297 static const FcChar8 *
 298 FcFileBaseName (const char *cache, const FcChar8 *file)
 299 {
 300     const FcChar8   *cache_slash;
 301
 302     cache_slash = FcStrLastSlash ((const FcChar8 *)cache);
 303     if (cache_slash && !strncmp ((const char *) cache, (const char *) file,
 304                                  (cache_slash + 1) - (const FcChar8 *)cache))
 305         return file + ((cache_slash + 1) - (const FcChar8 *)cache);
 306     return file;
 307 }
 308
 309 FcBool
 310 FcCachePrintSet (FcFontSet *set, FcStrSet *dirs, char *base_name)
 311 {
 312     FcPattern       *font;
 313     FcChar8         *name, *dir;
 314     const FcChar8   *file, *base;
 315     int             ret;
 316     int             n;
 317     int             id;
 318     FcStrList       *list;
 319
 320     list = FcStrListCreate (dirs);
 321     if (!list)
 322         goto bail2;
 323
 324     while ((dir = FcStrListNext (list)))
 325     {
 326         base = FcFileBaseName (base_name, dir);
 327         if (!FcCacheWriteStringOld (stdout, base))
 328             goto bail3;
 329         if (PUTC (' ', stdout) == EOF)
 330             goto bail3;
 331         if (!FcCacheWriteInt (stdout, 0))
 332             goto bail3;
 333         if (PUTC (' ', stdout) == EOF)
 334             goto bail3;
 335         if (!FcCacheWriteStringOld (stdout, FC_FONT_FILE_DIR))
 336             goto bail3;
 337         if (PUTC ('\n', stdout) == EOF)
 338             goto bail3;
 339     }
 340
 341     for (n = 0; n < set->nfont; n++)
 342     {
 343         font = set->fonts[n];
 344         if (FcPatternGetString (font, FC_FILE, 0, (FcChar8 **) &file) != FcResultMatch)
 345             goto bail3;
 346         base = FcFileBaseName (base_name, file);
 347         if (FcPatternGetInteger (font, FC_INDEX, 0, &id) != FcResultMatch)
 348             goto bail3;
 349         if (FcDebug () & FC_DBG_CACHEV)
 350             printf (" write file \"%s\"\n", base);
 351         if (!FcCacheWriteStringOld (stdout, base))
 352             goto bail3;
 353         if (PUTC (' ', stdout) == EOF)
 354             goto bail3;
 355         if (!FcCacheWriteInt (stdout, id))
 356             goto bail3;
 357         if (PUTC (' ', stdout) == EOF)
 358             goto bail3;
 359         name = FcNameUnparse (font);
 360         if (!name)
 361             goto bail3;
 362         ret = FcCacheWriteStringOld (stdout, name);
 363         FcStrFree (name);
 364         if (!ret)
 365             goto bail3;
 366         if (PUTC ('\n', stdout) == EOF)
 367             goto bail3;
 368     }
 369
 370     FcStrListDone (list);
 371
 372     return FcTrue;
 373
 374 bail3:
 375     FcStrListDone (list);
 376 bail2:
 377     return FcFalse;
 378 }
 379
 380 int
 381 main (int argc, char **argv)
 382 {
 383     int         i;
 384 #if HAVE_GETOPT_LONG || HAVE_GETOPT
 385     int         c;
 386     FcFontSet   *fs = FcFontSetCreate();
 387     FcStrSet    *dirs = FcStrSetCreate();
 388     char        *name_buf;
 389
 390 #if HAVE_GETOPT_LONG
 391     while ((c = getopt_long (argc, argv, "fsVv?", longopts, NULL)) != -1)
 392 #else
 393     while ((c = getopt (argc, argv, "fsVv?")) != -1)
 394 #endif
 395     {
 396         switch (c) {
 397         case 'V':
 398             fprintf (stderr, "fontconfig version %d.%d.%d\n",
 399                      FC_MAJOR, FC_MINOR, FC_REVISION);
 400             exit (0);
 401         default:
 402             usage (argv[0]);
 403         }
 404     }
 405     i = optind;
 406 #else
 407     i = 1;
 408 #endif
 409
 410     if (i >= argc)
 411         usage (argv[0]);
 412
 413     if ((name_buf = FcCacheFileRead (fs, dirs, argv[i])) != 0)
 414         FcCachePrintSet (fs, dirs, name_buf);
 415     else
 416     {
 417         FcStrSetDestroy (dirs);
 418         dirs = FcStrSetCreate ();
 419         if (FcCacheGlobalFileReadAndPrint (fs, dirs, argv[i]))
 420             ;
 421     }
 422
 423     FcStrSetDestroy (dirs);
 424     FcFontSetDestroy (fs);
 425
 426     return 0;
 427 }