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     off_t current_arch_start = 0;
 178
 179     if (!cache_file)
 180         goto bail;
 181
 182     current_arch_machine_name = FcCacheMachineSignature();
 183     fd = open(cache_file, O_RDONLY);
 184     if (fd == -1)
 185         goto bail;
 186
 187     current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
 188     if (current_arch_start < 0)
 189         goto bail1;
 190
 191     lseek (fd, current_arch_start, SEEK_SET);
 192     if (FcCacheReadString (fd, candidate_arch_machine_name,
 193                            sizeof (candidate_arch_machine_name)) == 0)
 194         goto bail1;
 195
 196     while (1)
 197     {
 198         char * dir, * ls;
 199         FcCacheReadString (fd, name_buf, sizeof (name_buf));
 200         if (!strlen(name_buf))
 201             break;
 202         printf ("fc-cat: printing global cache contents for dir %s\n",
 203                 name_buf);
 204
 205         if (!FcDirCacheConsume (fd, name_buf, set))
 206             goto bail1;
 207
 208         dir = strdup(name_buf);
 209         strcat (dir, "/");
 210
 211         FcCachePrintSet (set, dirs, dir);
 212         free (dir);
 213
 214         FcFontSetDestroy (set);
 215         set = FcFontSetCreate();
 216     }
 217
 218  bail1:
 219     close (fd);
 220  bail:
 221     return FcFalse;
 222 }
 223
 224 /* read serialized state from the cache file */
 225 static char *
 226 FcCacheFileRead (FcFontSet * set, FcStrSet *dirs, char *cache_file)
 227 {
 228     int fd;
 229     char * current_arch_machine_name;
 230     char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE];
 231     off_t current_arch_start = 0;
 232     char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1];
 233     static char name_buf[8192], *dir;
 234     FcChar8 * ls;
 235
 236     if (!cache_file)
 237         goto bail;
 238
 239     current_arch_machine_name = FcCacheMachineSignature();
 240     fd = open(cache_file, O_RDONLY);
 241     if (fd == -1)
 242         goto bail;
 243
 244     FcCacheReadString (fd, name_buf, sizeof (name_buf));
 245     if (!strlen (name_buf))
 246         goto bail;
 247     if (strcmp (name_buf, FC_GLOBAL_MAGIC_COOKIE) == 0)
 248         goto bail;
 249     printf ("fc-cat: printing directory cache for cache which would be named %s\n",
 250             name_buf);
 251
 252     current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
 253     if (current_arch_start < 0)
 254         goto bail1;
 255
 256     while (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0)
 257         FcStrSetAdd (dirs, (FcChar8 *)subdirName);
 258
 259     dir = strdup(name_buf);
 260     ls = FcStrLastSlash ((FcChar8 *)dir);
 261     if (ls)
 262         *ls = 0;
 263
 264     if (!FcDirCacheConsume (fd, dir, set))
 265         goto bail2;
 266     free (dir);
 267
 268     close(fd);
 269     return name_buf;
 270
 271  bail2:
 272     free (dir);
 273
 274  bail1:
 275     close (fd);
 276  bail:
 277     return 0;
 278 }
 279
 280 /*
 281  * return the path from the directory containing 'cache' to 'file'
 282  */
 283
 284 static const FcChar8 *
 285 FcFileBaseName (const char *cache, const FcChar8 *file)
 286 {
 287     const FcChar8   *cache_slash;
 288
 289     cache_slash = FcStrLastSlash ((const FcChar8 *)cache);
 290     if (cache_slash && !strncmp ((const char *) cache, (const char *) file,
 291                                  (cache_slash + 1) - (const FcChar8 *)cache))
 292         return file + ((cache_slash + 1) - (const FcChar8 *)cache);
 293     return file;
 294 }
 295
 296 FcBool
 297 FcCachePrintSet (FcFontSet *set, FcStrSet *dirs, char *base_name)
 298 {
 299     FcPattern       *font;
 300     FcChar8         *name, *dir;
 301     const FcChar8   *file, *base;
 302     int             ret;
 303     int             n;
 304     int             id;
 305     FcStrList       *list;
 306
 307     list = FcStrListCreate (dirs);
 308     if (!list)
 309         goto bail2;
 310
 311     while ((dir = FcStrListNext (list)))
 312     {
 313         base = FcFileBaseName (base_name, dir);
 314         if (!FcCacheWriteStringOld (stdout, base))
 315             goto bail3;
 316         if (PUTC (' ', stdout) == EOF)
 317             goto bail3;
 318         if (!FcCacheWriteInt (stdout, 0))
 319             goto bail3;
 320         if (PUTC (' ', stdout) == EOF)
 321             goto bail3;
 322         if (!FcCacheWriteStringOld (stdout, FC_FONT_FILE_DIR))
 323             goto bail3;
 324         if (PUTC ('\n', stdout) == EOF)
 325             goto bail3;
 326     }
 327
 328     for (n = 0; n < set->nfont; n++)
 329     {
 330         font = set->fonts[n];
 331         if (FcPatternGetString (font, FC_FILE, 0, (FcChar8 **) &file) != FcResultMatch)
 332             goto bail3;
 333         base = FcFileBaseName (base_name, file);
 334         if (FcPatternGetInteger (font, FC_INDEX, 0, &id) != FcResultMatch)
 335             goto bail3;
 336         if (FcDebug () & FC_DBG_CACHEV)
 337             printf (" write file \"%s\"\n", base);
 338         if (!FcCacheWriteStringOld (stdout, base))
 339             goto bail3;
 340         if (PUTC (' ', stdout) == EOF)
 341             goto bail3;
 342         if (!FcCacheWriteInt (stdout, id))
 343             goto bail3;
 344         if (PUTC (' ', stdout) == EOF)
 345             goto bail3;
 346         name = FcNameUnparse (font);
 347         if (!name)
 348             goto bail3;
 349         ret = FcCacheWriteStringOld (stdout, name);
 350         FcStrFree (name);
 351         if (!ret)
 352             goto bail3;
 353         if (PUTC ('\n', stdout) == EOF)
 354             goto bail3;
 355     }
 356
 357     FcStrListDone (list);
 358
 359     return FcTrue;
 360
 361 bail3:
 362     FcStrListDone (list);
 363 bail2:
 364     return FcFalse;
 365 }
 366
 367 int
 368 main (int argc, char **argv)
 369 {
 370     int         i;
 371 #if HAVE_GETOPT_LONG || HAVE_GETOPT
 372     int         c;
 373     FcFontSet   *fs = FcFontSetCreate();
 374     FcStrSet    *dirs = FcStrSetCreate();
 375     char        *name_buf;
 376
 377 #if HAVE_GETOPT_LONG
 378     while ((c = getopt_long (argc, argv, "fsVv?", longopts, NULL)) != -1)
 379 #else
 380     while ((c = getopt (argc, argv, "fsVv?")) != -1)
 381 #endif
 382     {
 383         switch (c) {
 384         case 'V':
 385             fprintf (stderr, "fontconfig version %d.%d.%d\n",
 386                      FC_MAJOR, FC_MINOR, FC_REVISION);
 387             exit (0);
 388         default:
 389             usage (argv[0]);
 390         }
 391     }
 392     i = optind;
 393 #else
 394     i = 1;
 395 #endif
 396
 397     if (i >= argc)
 398         usage (argv[0]);
 399
 400     if (name_buf = FcCacheFileRead (fs, dirs, argv[i]))
 401         FcCachePrintSet (fs, dirs, name_buf);
 402     else
 403     {
 404         FcStrSetDestroy (dirs);
 405         dirs = FcStrSetCreate ();
 406         if (FcCacheGlobalFileReadAndPrint (fs, dirs, argv[i]))
 407             ;
 408     }
 409
 410     FcStrSetDestroy (dirs);
 411     FcFontSetDestroy (fs);
 412
 413     return 0;
 414 }