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     {"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 /* read serialized state from the cache file */
 171 static char *
 172 FcCacheFileRead (FcFontSet * set, FcStrSet *dirs, char *cache_file)
 173 {
 174     FILE *file;
 175     int fd;
 176     char subdirName[FC_MAX_FILE_LEN + 1 + 12 + 1];
 177     static char name_buf[8192];
 178     FcChar8 * ls;
 179     char * buf;
 180     int i;
 181
 182     if (!cache_file)
 183         goto bail;
 184
 185     file = fopen(cache_file, "rb");
 186     if (file == NULL)
 187         goto bail;
 188
 189     if (!FcDirCacheConsume (file, set, dirs, NULL, name_buf))
 190         goto bail1;
 191
 192     fclose (file);
 193
 194     printf ("fc-cat: printing directory cache for cache which would be named %s\n",
 195             name_buf);
 196
 197     return name_buf;
 198
 199  bail1:
 200     fclose (file);
 201  bail:
 202     return 0;
 203 }
 204
 205 /*
 206  * return the path from the directory containing 'cache' to 'file'
 207  */
 208
 209 static const FcChar8 *
 210 FcFileBaseName (const char *cache, const FcChar8 *file)
 211 {
 212     const FcChar8   *cache_slash;
 213
 214     cache_slash = FcStrLastSlash ((const FcChar8 *)cache);
 215     if (cache_slash && !strncmp ((const char *) cache, (const char *) file,
 216                                  (cache_slash + 1) - (const FcChar8 *)cache))
 217         return file + ((cache_slash + 1) - (const FcChar8 *)cache);
 218     return file;
 219 }
 220
 221 FcBool
 222 FcCachePrintSet (FcFontSet *set, FcStrSet *dirs, char *base_name)
 223 {
 224     FcPattern       *font;
 225     FcChar8         *name, *dir;
 226     const FcChar8   *file, *base;
 227     int             ret;
 228     int             n;
 229     int             id;
 230     FcStrList       *list;
 231
 232     list = FcStrListCreate (dirs);
 233     if (!list)
 234         goto bail2;
 235
 236     while ((dir = FcStrListNext (list)))
 237     {
 238         base = FcFileBaseName (base_name, dir);
 239         if (!FcCacheWriteStringOld (stdout, base))
 240             goto bail3;
 241         if (PUTC (' ', stdout) == EOF)
 242             goto bail3;
 243         if (!FcCacheWriteInt (stdout, 0))
 244             goto bail3;
 245         if (PUTC (' ', stdout) == EOF)
 246             goto bail3;
 247         if (!FcCacheWriteStringOld (stdout, FC_FONT_FILE_DIR))
 248             goto bail3;
 249         if (PUTC ('\n', stdout) == EOF)
 250             goto bail3;
 251     }
 252
 253     for (n = 0; n < set->nfont; n++)
 254     {
 255         font = set->fonts[n];
 256         if (FcPatternGetString (font, FC_FILE, 0, (FcChar8 **) &file) != FcResultMatch)
 257             goto bail3;
 258         base = FcFileBaseName (base_name, file);
 259         if (FcPatternGetInteger (font, FC_INDEX, 0, &id) != FcResultMatch)
 260             goto bail3;
 261         if (FcDebug () & FC_DBG_CACHEV)
 262             printf (" write file \"%s\"\n", base);
 263         if (!FcCacheWriteStringOld (stdout, base))
 264             goto bail3;
 265         if (PUTC (' ', stdout) == EOF)
 266             goto bail3;
 267         if (!FcCacheWriteInt (stdout, id))
 268             goto bail3;
 269         if (PUTC (' ', stdout) == EOF)
 270             goto bail3;
 271         name = FcNameUnparse (font);
 272         if (!name)
 273             goto bail3;
 274         ret = FcCacheWriteStringOld (stdout, name);
 275         FcStrFree (name);
 276         if (!ret)
 277             goto bail3;
 278         if (PUTC ('\n', stdout) == EOF)
 279             goto bail3;
 280     }
 281
 282     FcStrListDone (list);
 283
 284     return FcTrue;
 285
 286 bail3:
 287     FcStrListDone (list);
 288 bail2:
 289     return FcFalse;
 290 }
 291
 292 int
 293 main (int argc, char **argv)
 294 {
 295     int         i;
 296 #if HAVE_GETOPT_LONG || HAVE_GETOPT
 297     int         c;
 298     FcFontSet   *fs = FcFontSetCreate();
 299     FcStrSet    *dirs = FcStrSetCreate();
 300     char        *name_buf;
 301     FcConfig    *config;
 302
 303 #if HAVE_GETOPT_LONG
 304     while ((c = getopt_long (argc, argv, "fsVv?", longopts, NULL)) != -1)
 305 #else
 306     while ((c = getopt (argc, argv, "fsVv?")) != -1)
 307 #endif
 308     {
 309         switch (c) {
 310         case 'V':
 311             fprintf (stderr, "fontconfig version %d.%d.%d\n",
 312                      FC_MAJOR, FC_MINOR, FC_REVISION);
 313             exit (0);
 314         default:
 315             usage (argv[0]);
 316         }
 317     }
 318     i = optind;
 319 #else
 320     i = 1;
 321 #endif
 322
 323     config = FcInitLoadConfig ();
 324     if (!config)
 325     {
 326         fprintf (stderr, "%s: Can't init font config library\n", argv[0]);
 327         return 1;
 328     }
 329     FcConfigSetCurrent (config);
 330
 331     if (i >= argc)
 332         usage (argv[0]);
 333
 334     if (FcFileIsDir ((const FcChar8 *)argv[i]))
 335     {
 336         char * dummy_name = (char *)FcStrPlus ((FcChar8 *)argv[i],
 337                                                (FcChar8 *)"/dummy");
 338         if (!FcDirScanConfig (fs, dirs, 0,
 339                               (const FcChar8 *)argv[i], FcFalse, config))
 340             fprintf (stderr, "couldn't load font dir %s\n", argv[i]);
 341         else
 342         {
 343             /* sorry, we can't tell you where the cache file is. */
 344             FcCachePrintSet (fs, dirs, dummy_name);
 345             FcStrFree ((FcChar8 *)dummy_name);
 346         }
 347     }
 348     else if ((name_buf = FcCacheFileRead (fs, dirs, argv[i])) != 0)
 349         FcCachePrintSet (fs, dirs, name_buf);
 350     else
 351     {
 352         printf ("nothing to do\n");
 353     }
 354
 355     FcStrSetDestroy (dirs);
 356     FcFontSetDestroy (fs);
 357
 358     return 0;
 359 }