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 static FcBool
  82 FcCacheWriteChars (FILE *f, const FcChar8 *chars)
  83 {
  84     FcChar8    c;
  85     while ((c = *chars++))
  86     {
  87         switch (c) {
  88         case '"':
  89         case '\\':
  90             if (PUTC ('\\', f) == EOF)
  91                 return FcFalse;
  92             /* fall through */
  93         default:
  94             if (PUTC (c, f) == EOF)
  95                 return FcFalse;
  96         }
  97     }
  98     return FcTrue;
  99 }
 100
 101 static FcBool
 102 FcCacheWriteUlong (FILE *f, unsigned long t)
 103 {
 104     int     pow;
 105     unsigned long   temp, digit;
 106
 107     temp = t;
 108     pow = 1;
 109     while (temp >= 10)
 110     {
 111         temp /= 10;
 112         pow *= 10;
 113     }
 114     temp = t;
 115     while (pow)
 116     {
 117         digit = temp / pow;
 118         if (PUTC ((char) digit + '0', f) == EOF)
 119             return FcFalse;
 120         temp = temp - pow * digit;
 121         pow = pow / 10;
 122     }
 123     return FcTrue;
 124 }
 125
 126 static FcBool
 127 FcCacheWriteInt (FILE *f, int i)
 128 {
 129     return FcCacheWriteUlong (f, (unsigned long) i);
 130 }
 131
 132 static FcBool
 133 FcCacheWriteStringOld (FILE *f, const FcChar8 *string)
 134 {
 135
 136     if (PUTC ('"', f) == EOF)
 137         return FcFalse;
 138     if (!FcCacheWriteChars (f, string))
 139         return FcFalse;
 140     if (PUTC ('"', f) == EOF)
 141         return FcFalse;
 142     return FcTrue;
 143 }
 144
 145 static void
 146 usage (char *program)
 147 {
 148 #if HAVE_GETOPT_LONG
 149     fprintf (stderr, "usage: %s [-V?] [--version] [--help] <fonts.cache-2>\n",
 150              program);
 151 #else
 152     fprintf (stderr, "usage: %s [-fsvV?] <fonts.cache-2>\n",
 153              program);
 154 #endif
 155     fprintf (stderr, "Reads font information caches in <fonts.cache-2>\n");
 156     fprintf (stderr, "\n");
 157 #if HAVE_GETOPT_LONG
 158     fprintf (stderr, "  -V, --version        display font config version and exit\n");
 159     fprintf (stderr, "  -?, --help           display this help and exit\n");
 160 #else
 161     fprintf (stderr, "  -V         (version) display font config version and exit\n");
 162     fprintf (stderr, "  -?         (help)    display this help and exit\n");
 163 #endif
 164     exit (1);
 165 }
 166
 167 static FcBool
 168 FcCacheGlobalFileReadAndPrint (FcFontSet * set, FcStrSet *dirs, char * dir, char *cache_file)
 169 {
 170     char                name_buf[8192];
 171     int fd;
 172     FcGlobalCacheDir    *d, *next;
 173     char * current_arch_machine_name;
 174     char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE];
 175     off_t current_arch_start = 0;
 176     char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1];
 177
 178     if (!cache_file)
 179         goto bail;
 180
 181     current_arch_machine_name = FcCacheMachineSignature();
 182     fd = open(cache_file, O_RDONLY);
 183     if (fd == -1)
 184         goto bail;
 185
 186     current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
 187     if (current_arch_start < 0)
 188         goto bail1;
 189
 190     lseek (fd, current_arch_start, SEEK_SET);
 191     if (FcCacheReadString (fd, candidate_arch_machine_name,
 192                            sizeof (candidate_arch_machine_name)) == 0)
 193         goto bail1;
 194
 195     while (1)
 196     {
 197         off_t targ;
 198
 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, dir, set))
 206             goto bail1;
 207
 208         FcCachePrintSet (set, dirs, name_buf);
 209
 210         FcFontSetDestroy (set);
 211         set = FcFontSetCreate();
 212     }
 213
 214  bail1:
 215     close (fd);
 216  bail:
 217     return FcFalse;
 218 }
 219
 220 /* read serialized state from the cache file */
 221 static FcBool
 222 FcCacheFileRead (FcFontSet * set, FcStrSet *dirs, char * dir, char *cache_file)
 223 {
 224     int fd;
 225     char * current_arch_machine_name;
 226     char candidate_arch_machine_name[9+MACHINE_SIGNATURE_SIZE];
 227     off_t current_arch_start = 0;
 228     char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1];
 229
 230     if (!cache_file)
 231         goto bail;
 232
 233     current_arch_machine_name = FcCacheMachineSignature();
 234     fd = open(cache_file, O_RDONLY);
 235     if (fd == -1)
 236         goto bail;
 237
 238     current_arch_start = FcCacheSkipToArch(fd, current_arch_machine_name);
 239     if (current_arch_start < 0)
 240         goto bail1;
 241
 242     lseek (fd, current_arch_start, SEEK_SET);
 243     if (FcCacheReadString (fd, candidate_arch_machine_name,
 244                            sizeof (candidate_arch_machine_name)) == 0)
 245         goto bail1;
 246
 247     while (strlen(FcCacheReadString (fd, subdirName, sizeof (subdirName))) > 0)
 248         FcStrSetAdd (dirs, (FcChar8 *)subdirName);
 249
 250     if (!FcDirCacheConsume (fd, dir, set))
 251         goto bail1;
 252
 253     close(fd);
 254     return FcTrue;
 255
 256  bail1:
 257     close (fd);
 258  bail:
 259     return FcFalse;
 260 }
 261
 262 /*
 263  * return the path from the directory containing 'cache' to 'file'
 264  */
 265
 266 static const FcChar8 *
 267 FcFileBaseName (const char *cache, const FcChar8 *file)
 268 {
 269     const FcChar8   *cache_slash;
 270
 271     cache_slash = FcStrLastSlash ((const FcChar8 *)cache);
 272     if (cache_slash && !strncmp ((const char *) cache, (const char *) file,
 273                                  (cache_slash + 1) - (const FcChar8 *)cache))
 274         return file + ((cache_slash + 1) - (const FcChar8 *)cache);
 275     return file;
 276 }
 277
 278 FcBool
 279 FcCachePrintSet (FcFontSet *set, FcStrSet *dirs, char *cache_file)
 280 {
 281     FcPattern       *font;
 282     FcChar8         *name, *dir;
 283     const FcChar8   *file, *base;
 284     int             ret;
 285     int             n;
 286     int             id;
 287     FcStrList       *list;
 288
 289     list = FcStrListCreate (dirs);
 290     if (!list)
 291         goto bail2;
 292
 293     while ((dir = FcStrListNext (list)))
 294     {
 295         base = FcFileBaseName (cache_file, dir);
 296         if (!FcCacheWriteStringOld (stdout, base))
 297             goto bail3;
 298         if (PUTC (' ', stdout) == EOF)
 299             goto bail3;
 300         if (!FcCacheWriteInt (stdout, 0))
 301             goto bail3;
 302         if (PUTC (' ', stdout) == EOF)
 303             goto bail3;
 304         if (!FcCacheWriteStringOld (stdout, FC_FONT_FILE_DIR))
 305             goto bail3;
 306         if (PUTC ('\n', stdout) == EOF)
 307             goto bail3;
 308     }
 309
 310     for (n = 0; n < set->nfont; n++)
 311     {
 312         font = set->fonts[n];
 313         if (FcPatternGetString (font, FC_FILE, 0, (FcChar8 **) &file) != FcResultMatch)
 314             goto bail3;
 315         base = FcFileBaseName (cache_file, file);
 316         if (FcPatternGetInteger (font, FC_INDEX, 0, &id) != FcResultMatch)
 317             goto bail3;
 318         if (FcDebug () & FC_DBG_CACHEV)
 319             printf (" write file \"%s\"\n", base);
 320         if (!FcCacheWriteStringOld (stdout, base))
 321             goto bail3;
 322         if (PUTC (' ', stdout) == EOF)
 323             goto bail3;
 324         if (!FcCacheWriteInt (stdout, id))
 325             goto bail3;
 326         if (PUTC (' ', stdout) == EOF)
 327             goto bail3;
 328         name = FcNameUnparse (font);
 329         if (!name)
 330             goto bail3;
 331         ret = FcCacheWriteStringOld (stdout, name);
 332         FcStrFree (name);
 333         if (!ret)
 334             goto bail3;
 335         if (PUTC ('\n', stdout) == EOF)
 336             goto bail3;
 337     }
 338
 339     FcStrListDone (list);
 340
 341     return FcTrue;
 342
 343 bail3:
 344     FcStrListDone (list);
 345 bail2:
 346 bail1:
 347 bail0:
 348     return FcFalse;
 349 }
 350
 351 int
 352 main (int argc, char **argv)
 353 {
 354     int         i;
 355 #if HAVE_GETOPT_LONG || HAVE_GETOPT
 356     int         c;
 357     FcFontSet   *fs = FcFontSetCreate();
 358     FcStrSet    *dirs = FcStrSetCreate();
 359
 360 #if HAVE_GETOPT_LONG
 361     while ((c = getopt_long (argc, argv, "fsVv?", longopts, NULL)) != -1)
 362 #else
 363     while ((c = getopt (argc, argv, "fsVv?")) != -1)
 364 #endif
 365     {
 366         switch (c) {
 367         case 'V':
 368             fprintf (stderr, "fontconfig version %d.%d.%d\n",
 369                      FC_MAJOR, FC_MINOR, FC_REVISION);
 370             exit (0);
 371         default:
 372             usage (argv[0]);
 373         }
 374     }
 375     i = optind;
 376 #else
 377     i = 1;
 378 #endif
 379
 380     if (i >= argc)
 381         usage (argv[0]);
 382
 383     if (FcCacheFileRead (fs, dirs, dirname (strdup(argv[i])), argv[i]))
 384         FcCachePrintSet (fs, dirs, argv[i]);
 385     else
 386     {
 387         FcStrSetDestroy (dirs);
 388         dirs = FcStrSetCreate ();
 389         if (FcCacheGlobalFileReadAndPrint (fs, dirs, dirname (strdup (argv[i])),
 390                                            argv[i]))
 391             ;
 392     }
 393
 394     FcStrSetDestroy (dirs);
 395     FcFontSetDestroy (fs);
 396
 397     return 0;
 398 }