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