fc-arch/fc-arch.c

   1 /*
   2  * Copyright © 2006 Keith Packard
   3  * Copyright © 2005 Patrick Lam
   4  *
   5  * Permission to use, copy, modify, distribute, and sell this software and its
   6  * documentation for any purpose is hereby granted without fee, provided that
   7  * the above copyright notice appear in all copies and that both that copyright
   8  * notice and this permission notice appear in supporting documentation, and
   9  * that the name of the copyright holders not be used in advertising or
  10  * publicity pertaining to distribution of the software without specific,
  11  * written prior permission.  The copyright holders make no representations
  12  * about the suitability of this software for any purpose.  It is provided "as
  13  * is" without express or implied warranty.
  14  *
  15  * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  16  * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
  17  * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
  18  * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
  19  * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
  20  * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
  21  * OF THIS SOFTWARE.
  22  */
  23
  24 #include "fcint.h"
  25 #include <ctype.h>
  26
  27 #define ENDIAN_TEST 0x12345678
  28 #define MACHINE_SIGNATURE_SIZE (9*21 + 1)
  29
  30 static char *
  31 FcCacheMachineSignature (void)
  32 {
  33     static char buf[MACHINE_SIGNATURE_SIZE];
  34     int32_t magic = ENDIAN_TEST;
  35     char * m = (char *)&magic;
  36
  37     sprintf (buf, "%2x%2x%2x%2x_"
  38              "%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x_"
  39              "%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x",
  40              m[0], m[1], m[2], m[3],
  41              (unsigned int)sizeof (char),
  42              (unsigned int)sizeof (char *),
  43              (unsigned int)sizeof (int),
  44              (unsigned int)sizeof (intptr_t),
  45              (unsigned int)sizeof (FcPattern),
  46              (unsigned int)sizeof (FcPatternEltPtr),
  47              (unsigned int)sizeof (struct  FcPatternElt *),
  48              (unsigned int)sizeof (FcPatternElt),
  49              (unsigned int)sizeof (FcObject),
  50              (unsigned int)sizeof (FcValueListPtr),
  51              (unsigned int)sizeof (FcValue),
  52              (unsigned int)sizeof (FcValueBinding),
  53              (unsigned int)sizeof (struct  FcValueList *),
  54              (unsigned int)sizeof (FcCharSet),
  55              (unsigned int)sizeof (FcCharLeaf **),
  56              (unsigned int)sizeof (FcChar16 *),
  57              (unsigned int)sizeof (FcChar16),
  58              (unsigned int)sizeof (FcCharLeaf),
  59              (unsigned int)sizeof (FcChar32),
  60              (unsigned int)sizeof (FcCache));
  61
  62     return buf;
  63 }
  64
  65 int
  66 main (int argc, char **argv)
  67 {
  68     static char         line[1024];
  69     char                *signature;
  70     int                 signature_length;
  71     char                *space;
  72     char                *arch = NULL;
  73     int                 lineno = 0;
  74
  75     if (argc != 2)
  76         fprintf (stderr, "Usage: %s <architecture>|auto < fcarch.tmpl.h > fcarch.h\n",
  77                  argv[0]);
  78     arch = argv[1];
  79     /*
  80      * Scan the input until the marker is found
  81      */
  82
  83     while (fgets (line, sizeof (line), stdin))
  84     {
  85         lineno++;
  86         if (!strncmp (line, "@@@", 3))
  87             break;
  88         fputs (line, stdout);
  89     }
  90     signature = FcCacheMachineSignature();
  91     signature_length = strlen (signature);
  92
  93     if (strcmp (arch, "auto") == 0)
  94     {
  95         arch = NULL;
  96         /*
  97          * Search for signature
  98          */
  99         while (fgets (line, sizeof (line), stdin))
 100         {
 101             lineno++;
 102             /*
 103              * skip comments
 104              */
 105             if (!strncmp (line, "@@@", 3))
 106                 continue;
 107             space = line;
 108             while (*space && !isspace (*space))
 109                 space++;
 110             if (!space)
 111             {
 112                 fprintf (stderr, "%s: malformed input on line %d\n",
 113                          argv[0], lineno);
 114                 exit (1);
 115             }
 116             *space++ = '\0';
 117             while (isspace (*space))
 118                 space++;
 119             if (!strncmp (space, signature, signature_length))
 120             {
 121                 arch = line;
 122                 break;
 123             }
 124         }
 125     }
 126     if (!arch)
 127     {
 128         fprintf (stderr, "%s: unknown signature \"%s\"\n", argv[0], signature);
 129         fprintf (stderr, "\tPlease update fcarch.tmpl.h and rebuild\n");
 130         exit (1);
 131     }
 132     printf ("#define FC_ARCHITECTURE \"%s\"\n", arch);
 133     fflush (stdout);
 134     exit (ferror (stdout));
 135 }
 136