/* type_s32.h

  Define 32-bit integer data types, basec on user-supplied options of
  compiler-supplied #defines if available.

Here is a partial list of compiler defines that can be used to figure
out the size of pointer and long. They are used like this:
#if (defined(__foo__) && defined(__bar__))

  width  defines
     64  _AIX && __64BIT__
     64  __hpux && __LP64__
  32     __linux__ && __i386__
     64  __linux__ && __ia64__
     64  __linux__ && __x86_64__
  32     __linux__ && __powerpc__
     64  __linux__ && __powerpc64__
  32     __linux__ && __s390__
     64  __linux__ && __s390x__
     64  __osf__
     64  sinix && __LP64__
     64  _WIN64
  32     _WIN32

In the cases when long is 64-bit, int is 32-bit.

More notes about this are in type_s64.h

 */

/* First check user-supplied options */
#ifdef INT_IS_S32
  typedef   signed int s32;
  typedef unsigned int u32;
# define HAVE_S32
#elif LONG_IS_S32
  typedef   signed long s32;
  typedef unsigned long u32;
# define HAVE_S32
#endif

/* If our compiler is GCC, int is almost certainly 32-bit. */
#ifdef __GNUC__
  typedef   signed int s32;
  typedef unsigned int u32;
# define HAVE_S32
#endif

/* %%% Perhaps I can MSFT and use something like __int32 */

/* Defaults */
#ifndef HAVE_S32
  typedef   signed int s32;
  typedef unsigned int u32;
# define HAVE_S32
#endif

/* This macro provides code that you can use at runtime (e.g. at the beginning
   of your main) to make sure s32 is actually 32 bits. It assumes <stdio.h>
   is already included. We don't include stdio for you because perhaps you
   don't want to use this macro. */
#ifndef TYPE_S32_CHECK_SIZE
# define TYPE_S32_CHECK_SIZE(procname) \
  if (sizeof(s32) != 4) { \
    printf("%s: s32 is not 4 bytes (got %d).\n", \
      (procname), (int) sizeof(s32)); \
    if (sizeof(int) == 4) { \
      printf( \
        "  To fix this error, recompile with the flag -DINT_IS_S32\n"); \
    } else if (sizeof(long) == 4) { \
      printf( \
        "  To fix this error, recompile with the flag -DLONG_IS_S32\n"); \
    } else { \
      printf( \
        "  (presently, sizeof(int)==%d and sizeof(long)==%d)\n", \
        (int) sizeof(int), (int) sizeof(long)); \
    } \
    exit(-1); \
  }
#endif