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*22 + 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_%08x",
  40              m[0], m[1], m[2], m[3],
  41              (unsigned int)sizeof (FcAlign),
  42              (unsigned int)sizeof (char),
  43              (unsigned int)sizeof (char *),
  44              (unsigned int)sizeof (int),
  45              (unsigned int)sizeof (intptr_t),
  46              (unsigned int)sizeof (FcPattern),
  47              (unsigned int)sizeof (FcPatternEltPtr),
  48              (unsigned int)sizeof (struct  FcPatternElt *),
  49              (unsigned int)sizeof (FcPatternElt),
  50              (unsigned int)sizeof (FcObject),
  51              (unsigned int)sizeof (FcValueListPtr),
  52              (unsigned int)sizeof (FcValue),
  53              (unsigned int)sizeof (FcValueBinding),
  54              (unsigned int)sizeof (struct  FcValueList *),
  55              (unsigned int)sizeof (FcCharSet),
  56              (unsigned int)sizeof (FcCharLeaf **),
  57              (unsigned int)sizeof (FcChar16 *),
  58              (unsigned int)sizeof (FcChar16),
  59              (unsigned int)sizeof (FcCharLeaf),
  60              (unsigned int)sizeof (FcChar32),
  61              (unsigned int)sizeof (FcCache));
  62
  63     return buf;
  64 }
  65
  66 int
  67 main (int argc, char **argv)
  68 {
  69     static char         line[1024];
  70     char                *signature;
  71     int                 signature_length;
  72     char                *space;
  73     char                *arch = NULL;
  74     int                 lineno = 0;
  75
  76     if (argc != 2)
  77         fprintf (stderr, "Usage: %s <architecture>|auto < fcarch.tmpl.h > fcarch.h\n",
  78                  argv[0]);
  79     arch = argv[1];
  80     /*
  81      * Scan the input until the marker is found
  82      */
  83
  84     while (fgets (line, sizeof (line), stdin))
  85     {
  86         lineno++;
  87         if (!strncmp (line, "@@@", 3))
  88             break;
  89         fputs (line, stdout);
  90     }
  91     signature = FcCacheMachineSignature();
  92     signature_length = strlen (signature);
  93
  94     if (strcmp (arch, "auto") == 0)
  95     {
  96         arch = NULL;
  97         /*
  98          * Search for signature
  99          */
 100         while (fgets (line, sizeof (line), stdin))
 101         {
 102             lineno++;
 103             /*
 104              * skip comments
 105              */
 106             if (!strncmp (line, "@@@", 3))
 107                 continue;
 108             space = line;
 109             while (*space && !isspace (*space))
 110                 space++;
 111             if (!space)
 112             {
 113                 fprintf (stderr, "%s: malformed input on line %d\n",
 114                          argv[0], lineno);
 115                 exit (1);
 116             }
 117             *space++ = '\0';
 118             while (isspace (*space))
 119                 space++;
 120             if (!strncmp (space, signature, signature_length))
 121             {
 122                 arch = line;
 123                 break;
 124             }
 125         }
 126     }
 127     if (!arch)
 128     {
 129         fprintf (stderr, "%s: unknown signature \"%s\"\n", argv[0], signature);
 130         fprintf (stderr, "\tPlease update fcarch.tmpl.h and rebuild\n");
 131         exit (1);
 132     }
 133     printf ("#define FC_ARCHITECTURE \"%s\"\n", arch);
 134     fflush (stdout);
 135     exit (ferror (stdout));
 136 }
 137