lib/art/gen_art_config.c

   1 #include <stdio.h>
   2 #include "config.h"
   3 #include <stdlib.h>
   4
   5 /**
   6  * A little utility function to generate header info.
   7  *
   8  * Yes, it would be possible to do this using more "native" autoconf
   9  * features, but I personally find this approach to be cleaner.
  10  *
  11  * The output of this program is generally written to art_config.h,
  12  * which is installed in libart's include dir.
  13  **/
  14
  15 static void
  16 die (char *why)
  17 {
  18   fprintf (stderr, "gen_art_config: %s\n", why);
  19   exit (1);
  20 }
  21
  22 int
  23 main (int argc, char **argv)
  24 {
  25   printf ("/* Automatically generated by gen_art_config.c */\n"
  26           "\n"
  27           "#define ART_SIZEOF_CHAR %d\n"
  28           "#define ART_SIZEOF_SHORT %d\n"
  29           "#define ART_SIZEOF_INT %d\n"
  30           "#define ART_SIZEOF_LONG %d\n"
  31           "\n",
  32           (int)sizeof(char), (int)sizeof(short), (int)sizeof(int), (int)sizeof(long));
  33
  34   if (sizeof(char) == 1)
  35     printf ("typedef unsigned char art_u8;\n");
  36   else
  37     die ("sizeof(char) != 1");
  38
  39   if (sizeof(short) == 2)
  40     printf ("typedef unsigned short art_u16;\n");
  41   else
  42     die ("sizeof(short) != 2");
  43
  44   if (sizeof(int) == 4)
  45     printf ("typedef unsigned int art_u32;\n");
  46   else if (sizeof(long) == 4)
  47     printf ("typedef unsigned long art_u32;\n");
  48   else
  49     die ("sizeof(int) != 4 and sizeof(long) != 4");
  50
  51   return 0;
  52 }