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 #define MACHINE_ARCH_SIZE   32
  30 /* for when we don't have sysconf: */
  31 #define FC_HARDCODED_PAGESIZE 8192
  32
  33 static char *
  34 FcCacheMachineSignature (void)
  35 {
  36     static char buf[MACHINE_SIGNATURE_SIZE];
  37     int32_t magic = ENDIAN_TEST;
  38     char * m = (char *)&magic;
  39
  40     sprintf (buf, "%2x%2x%2x%2x_"
  41              "%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x_"
  42              "%08x_%08x_%08x_%08x_%08x_%08x_%08x_%08x",
  43              m[0], m[1], m[2], m[3],
  44              (unsigned int)sizeof (char),
  45              (unsigned int)sizeof (char *),
  46              (unsigned int)sizeof (int),
  47              (unsigned int)sizeof (FcPattern),
  48              (unsigned int)sizeof (FcPatternEltPtr),
  49              (unsigned int)sizeof (struct  FcPatternElt *),
  50              (unsigned int)sizeof (FcPatternElt),
  51              (unsigned int)sizeof (FcObjectPtr),
  52              (unsigned int)sizeof (FcValueListPtr),
  53              (unsigned int)sizeof (FcValue),
  54              (unsigned int)sizeof (FcValueBinding),
  55              (unsigned int)sizeof (struct  FcValueList *),
  56              (unsigned int)sizeof (FcCharSet),
  57              (unsigned int)sizeof (FcCharLeaf **),
  58              (unsigned int)sizeof (FcChar16 *),
  59              (unsigned int)sizeof (FcChar16),
  60              (unsigned int)sizeof (FcCharLeaf),
  61              (unsigned int)sizeof (FcChar32),
  62              (unsigned int)sizeof (FcCache),
  63 #if defined (HAVE_SYSCONF)
  64              (unsigned int)sysconf(_SC_PAGESIZE)
  65 #else
  66              (unsigned int)FC_HARDCODED_PAGESIZE
  67 #endif
  68              );
  69
  70     return buf;
  71 }
  72
  73 int
  74 main (int argc, char **argv)
  75 {
  76     static char         line[1024];
  77     char                *signature;
  78     int                 signature_length;
  79     char                *space;
  80     char                *arch = NULL;
  81     int                 lineno = 0;
  82
  83     if (argc != 2)
  84         fprintf (stderr, "Usage: %s <architecture>|auto < fcarch.tmpl.h > fcarch.h\n",
  85                  argv[0]);
  86     arch = argv[1];
  87     /*
  88      * Scan the input until the marker is found
  89      */
  90
  91     while (fgets (line, sizeof (line), stdin))
  92     {
  93         lineno++;
  94         if (!strncmp (line, "@@@", 3))
  95             break;
  96         fputs (line, stdout);
  97     }
  98     signature = FcCacheMachineSignature();
  99     signature_length = strlen (signature);
 100
 101     if (strcmp (arch, "auto") == 0)
 102     {
 103         arch = NULL;
 104         /*
 105          * Search for signature
 106          */
 107         while (fgets (line, sizeof (line), stdin))
 108         {
 109             lineno++;
 110             /*
 111              * skip comments
 112              */
 113             if (!strncmp (line, "@@@", 3))
 114                 continue;
 115             space = line;
 116             while (*space && !isspace (*space))
 117                 space++;
 118             if (!space)
 119             {
 120                 fprintf (stderr, "%s: malformed input on line %d\n",
 121                          argv[0], lineno);
 122                 exit (1);
 123             }
 124             *space++ = '\0';
 125             while (isspace (*space))
 126                 space++;
 127             if (!strncmp (space, signature, signature_length))
 128             {
 129                 arch = line;
 130                 break;
 131             }
 132         }
 133     }
 134     if (!arch)
 135     {
 136         fprintf (stderr, "%s: unknown signature \"%s\"\n", argv[0], signature);
 137         fprintf (stderr, "\tPlease update fcarch.tmpl.h and rebuild\n");
 138         exit (1);
 139     }
 140     printf ("#define FC_ARCHITECTURE \"%s\"\n", arch);
 141     fflush (stdout);
 142     exit (ferror (stdout));
 143 }
 144