types.m4

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     AC_DEFINE_UNQUOTED([intmax_t], [$ac_type],
       [Define to the widest signed integer type
	if <stdint.h> and <inttypes.h> do not define.])])
])


# AC_TYPE_UINTMAX_T
# -----------------
AC_DEFUN([AC_TYPE_UINTMAX_T],
[
  AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])
  AC_CHECK_TYPE([uintmax_t],
    [AC_DEFINE([HAVE_UINTMAX_T], 1,
       [Define to 1 if the system has the type `uintmax_t'.])],
    [test $ac_cv_type_unsigned_long_long_int = yes \
       && ac_type='unsigned long long int' \
       || ac_type='unsigned long int'
     AC_DEFINE_UNQUOTED([uintmax_t], [$ac_type],
       [Define to the widest unsigned integer type
	if <stdint.h> and <inttypes.h> do not define.])])
])


# AC_TYPE_INTPTR_T
# -----------------
AC_DEFUN([AC_TYPE_INTPTR_T],
[
  AC_CHECK_TYPE([intptr_t],
    [AC_DEFINE([HAVE_INTPTR_T], 1,
       [Define to 1 if the system has the type `intptr_t'.])],
    [for ac_type in 'int' 'long int' 'long long int'; do
       AC_COMPILE_IFELSE(
	 [AC_LANG_BOOL_COMPILE_TRY(
	    [AC_INCLUDES_DEFAULT],
	    [[sizeof (void *) <= sizeof ($ac_type)]])],
	 [AC_DEFINE_UNQUOTED([intptr_t], [$ac_type],
	    [Define to the type of a signed integer type wide enough to
	     hold a pointer, if such a type exists, and if the system
	     does not define it.])
	  ac_type=])
       test -z "$ac_type" && break
     done])
])


# AC_TYPE_UINTPTR_T
# -----------------
AC_DEFUN([AC_TYPE_UINTPTR_T],
[
  AC_CHECK_TYPE([uintptr_t],
    [AC_DEFINE([HAVE_UINTPTR_T], 1,
       [Define to 1 if the system has the type `uintptr_t'.])],
    [for ac_type in 'unsigned int' 'unsigned long int' \
	'unsigned long long int'; do
       AC_COMPILE_IFELSE(
	 [AC_LANG_BOOL_COMPILE_TRY(
	    [AC_INCLUDES_DEFAULT],
	    [[sizeof (void *) <= sizeof ($ac_type)]])],
	 [AC_DEFINE_UNQUOTED([uintptr_t], [$ac_type],
	    [Define to the type of an unsigned integer type wide enough to
	     hold a pointer, if such a type exists, and if the system
	     does not define it.])
	  ac_type=])
       test -z "$ac_type" && break
     done])
])


# AC_TYPE_LONG_DOUBLE
# -------------------
AC_DEFUN([AC_TYPE_LONG_DOUBLE],
[
  AC_CACHE_CHECK([for long double], [ac_cv_type_long_double],
    [if test "$GCC" = yes; then
       ac_cv_type_long_double=yes
     else
       AC_COMPILE_IFELSE(
	 [AC_LANG_BOOL_COMPILE_TRY(
	    [[/* The Stardent Vistra knows sizeof (long double), but does
		 not support it.  */
	      long double foo = 0.0L;]],
	    [[/* On Ultrix 4.3 cc, long double is 4 and double is 8.  */
	      sizeof (double) <= sizeof (long double)]])],
	 [ac_cv_type_long_double=yes],
	 [ac_cv_type_long_double=no])
     fi])
  if test $ac_cv_type_long_double = yes; then
    AC_DEFINE([HAVE_LONG_DOUBLE], 1,
      [Define to 1 if the system has the type `long double'.])
  fi
])


# AC_TYPE_LONG_DOUBLE_WIDER
# -------------------------
AC_DEFUN([AC_TYPE_LONG_DOUBLE_WIDER],
[
  AC_CACHE_CHECK(
    [for long double with more range or precision than double],
    [ac_cv_type_long_double_wider],
    [AC_COMPILE_IFELSE(
       [AC_LANG_BOOL_COMPILE_TRY(
	  [[#include <float.h>
	    long double const a[] =
	      {
		 0.0L, DBL_MIN, DBL_MAX, DBL_EPSILON,
		 LDBL_MIN, LDBL_MAX, LDBL_EPSILON
	      };
	    long double
	    f (long double x)
	    {
	       return ((x + (unsigned long int) 10) * (-1 / x) + a[0]
			+ (x ? f (x) : 'c'));
	    }
	  ]],
	  [[(0 < ((DBL_MAX_EXP < LDBL_MAX_EXP)
		   + (DBL_MANT_DIG < LDBL_MANT_DIG)
		   - (LDBL_MAX_EXP < DBL_MAX_EXP)
		   - (LDBL_MANT_DIG < DBL_MANT_DIG)))
	    && (int) LDBL_EPSILON == 0
	  ]])],
       ac_cv_type_long_double_wider=yes,
       ac_cv_type_long_double_wider=no)])
  if test $ac_cv_type_long_double_wider = yes; then
    AC_DEFINE([HAVE_LONG_DOUBLE_WIDER], 1,
      [Define to 1 if the type `long double' works and has more range or
       precision than `double'.])
  fi
])# AC_TYPE_LONG_DOUBLE_WIDER


# AC_C_LONG_DOUBLE
# ----------------
AU_DEFUN([AC_C_LONG_DOUBLE],
  [
    AC_TYPE_LONG_DOUBLE_WIDER
    ac_cv_c_long_double=$ac_cv_type_long_double_wider
    if test $ac_cv_c_long_double = yes; then
      AC_DEFINE([HAVE_LONG_DOUBLE], 1,
	[Define to 1 if the type `long double' works and has more range or
	 precision than `double'.])
    fi
  ],
  [The macro `AC_C_LONG_DOUBLE' is obsolete.
You should use `AC_TYPE_LONG_DOUBLE' or `AC_TYPE_LONG_DOUBLE_WIDER' instead.]
)


# AC_TYPE_LONG_LONG_INT
# ---------------------
AC_DEFUN([AC_TYPE_LONG_LONG_INT],
[
  AC_CACHE_CHECK([for long long int], [ac_cv_type_long_long_int],
    [AC_LINK_IFELSE(
       [AC_LANG_PROGRAM(
	  [long long int ll = 1LL; int i = 63;],
	  [long long int llmax = (long long int) -1;
	   return ll << i | ll >> i | llmax / ll | llmax % ll;])],
       [ac_cv_type_long_long_int=yes],
       [ac_cv_type_long_long_int=no])])
  if test $ac_cv_type_long_long_int = yes; then
    AC_DEFINE([HAVE_LONG_LONG_INT], 1,
      [Define to 1 if the system has the type `long long int'.])
  fi
])


# AC_TYPE_UNSIGNED_LONG_LONG_INT
# ------------------------------
AC_DEFUN([AC_TYPE_UNSIGNED_LONG_LONG_INT],
[
  AC_CACHE_CHECK([for unsigned long long int],
    [ac_cv_type_unsigned_long_long_int],
    [AC_LINK_IFELSE(
       [AC_LANG_PROGRAM(
	  [unsigned long long int ull = 1ULL; int i = 63;],
	  [unsigned long long int ullmax = (unsigned long long int) -1;
	   return ull << i | ull >> i | ullmax / ull | ullmax % ull;])],
       [ac_cv_type_unsigned_long_long_int=yes],
       [ac_cv_type_unsigned_long_long_int=no])])
  if test $ac_cv_type_unsigned_long_long_int = yes; then
    AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], 1,
      [Define to 1 if the system has the type `unsigned long long int'.])
  fi
])


# AC_TYPE_MBSTATE_T
# -----------------
AC_DEFUN([AC_TYPE_MBSTATE_T],
  [AC_CACHE_CHECK([for mbstate_t], ac_cv_type_mbstate_t,
     [AC_COMPILE_IFELSE(
	[AC_LANG_PROGRAM(
	   [AC_INCLUDES_DEFAULT
#	    include <wchar.h>],
	   [mbstate_t x; return sizeof x;])],
	[ac_cv_type_mbstate_t=yes],
	[ac_cv_type_mbstate_t=no])])
   if test $ac_cv_type_mbstate_t = yes; then
     AC_DEFINE([HAVE_MBSTATE_T], 1,
	       [Define to 1 if <wchar.h> declares mbstate_t.])
   else
     AC_DEFINE([mbstate_t], int,
	       [Define to a type if <wchar.h> does not define.])
   fi])


# AC_TYPE_UID_T
# -------------
# FIXME: Rewrite using AC_CHECK_TYPE.
AN_IDENTIFIER([gid_t], [AC_TYPE_UID_T])
AN_IDENTIFIER([uid_t], [AC_TYPE_UID_T])
AC_DEFUN([AC_TYPE_UID_T],
[AC_CACHE_CHECK(for uid_t in sys/types.h, ac_cv_type_uid_t,
[AC_EGREP_HEADER(uid_t, sys/types.h,
  ac_cv_type_uid_t=yes, ac_cv_type_uid_t=no)])
if test $ac_cv_type_uid_t = no; then
  AC_DEFINE(uid_t, int, [Define to `int' if <sys/types.h> doesn't define.])
  AC_DEFINE(gid_t, int, [Define to `int' if <sys/types.h> doesn't define.])
fi
])


AN_IDENTIFIER([size_t], [AC_TYPE_SIZE_T])
AC_DEFUN([AC_TYPE_SIZE_T], [AC_CHECK_TYPE(size_t, unsigned int)])

AN_IDENTIFIER([ssize_t], [AC_TYPE_SSIZE_T])
AC_DEFUN([AC_TYPE_SSIZE_T], [AC_CHECK_TYPE(ssize_t, int)])

AN_IDENTIFIER([pid_t], [AC_TYPE_PID_T])
AC_DEFUN([AC_TYPE_PID_T],  [AC_CHECK_TYPE(pid_t,  int)])

AN_IDENTIFIER([off_t], [AC_TYPE_OFF_T])
AC_DEFUN([AC_TYPE_OFF_T],  [AC_CHECK_TYPE(off_t,  long int)])

AN_IDENTIFIER([mode_t], [AC_TYPE_MODE_T])
AC_DEFUN([AC_TYPE_MODE_T], [AC_CHECK_TYPE(mode_t, int)])

AN_IDENTIFIER([int8_t], [AC_TYPE_INT8_T])
AN_IDENTIFIER([int16_t], [AC_TYPE_INT16_T])
AN_IDENTIFIER([int32_t], [AC_TYPE_INT32_T])
AN_IDENTIFIER([int64_t], [AC_TYPE_INT64_T])
AN_IDENTIFIER([uint8_t], [AC_TYPE_UINT8_T])
AN_IDENTIFIER([uint16_t], [AC_TYPE_UINT16_T])
AN_IDENTIFIER([uint32_t], [AC_TYPE_UINT32_T])
AN_IDENTIFIER([uint64_t], [AC_TYPE_UINT64_T])
AC_DEFUN([AC_TYPE_INT8_T], [_AC_TYPE_INT(8)])
AC_DEFUN([AC_TYPE_INT16_T], [_AC_TYPE_INT(16)])
AC_DEFUN([AC_TYPE_INT32_T], [_AC_TYPE_INT(32)])
AC_DEFUN([AC_TYPE_INT64_T], [_AC_TYPE_INT(64)])
AC_DEFUN([AC_TYPE_UINT8_T], [_AC_TYPE_UNSIGNED_INT(8)])
AC_DEFUN([AC_TYPE_UINT16_T], [_AC_TYPE_UNSIGNED_INT(16)])
AC_DEFUN([AC_TYPE_UINT32_T], [_AC_TYPE_UNSIGNED_INT(32)])
AC_DEFUN([AC_TYPE_UINT64_T], [_AC_TYPE_UNSIGNED_INT(64)])

# _AC_TYPE_INT(NBITS)
# -------------------
AC_DEFUN([_AC_TYPE_INT],
[
  AC_CACHE_CHECK([for int$1_t], [ac_cv_c_int$1_t],
    [ac_cv_c_int$1_t=no
     for ac_type in 'int$1_t' 'int' 'long int' \
	 'long long int' 'short int' 'signed char'; do
       AC_COMPILE_IFELSE(
	 [AC_LANG_BOOL_COMPILE_TRY(
	    [AC_INCLUDES_DEFAULT],
	    [[0 < ($ac_type) (((($ac_type) 1 << ($1 - 2)) - 1) * 2 + 1)]])],
	 [AC_COMPILE_IFELSE(
	    [AC_LANG_BOOL_COMPILE_TRY(
	       [AC_INCLUDES_DEFAULT],
	       [[($ac_type) (((($ac_type) 1 << ($1 - 2)) - 1) * 2 + 1)
	         < ($ac_type) (((($ac_type) 1 << ($1 - 2)) - 1) * 2 + 2)]])],
	    [],
	    [AS_CASE([$ac_type], [int$1_t],
	       [ac_cv_c_int$1_t=yes],
	       [ac_cv_c_int$1_t=$ac_type])])])
       test "$ac_cv_c_int$1_t" != no && break
     done])
  case $ac_cv_c_int$1_t in #(
  no|yes) ;; #(
  *)
    AC_DEFINE_UNQUOTED([int$1_t], [$ac_cv_c_int$1_t],
      [Define to the type of a signed integer type of width exactly $1 bits
       if such a type exists and the standard includes do not define it.]);;
  esac
])# _AC_TYPE_INT

# _AC_TYPE_UNSIGNED_INT(NBITS)
# ----------------------------
AC_DEFUN([_AC_TYPE_UNSIGNED_INT],
[
  AC_CACHE_CHECK([for uint$1_t], [ac_cv_c_uint$1_t],
    [ac_cv_c_uint$1_t=no
     for ac_type in 'uint$1_t' 'unsigned int' 'unsigned long int' \
	 'unsigned long long int' 'unsigned short int' 'unsigned char'; do
       AC_COMPILE_IFELSE(
	 [AC_LANG_BOOL_COMPILE_TRY(
	    [AC_INCLUDES_DEFAULT],
	    [[($ac_type) -1 >> ($1 - 1) == 1]])],
	 [AS_CASE([$ac_type], [uint$1_t],
	    [ac_cv_c_uint$1_t=yes],
	    [ac_cv_c_uint$1_t=$ac_type])])
       test "$ac_cv_c_uint$1_t" != no && break
     done])
  case $ac_cv_c_uint$1_t in #(
  no|yes) ;; #(
  *)
    m4_bmatch([$1], [^\(8\|32\|64\)$],
      [AC_DEFINE([_UINT$1_T], 1,
	 [Define for Solaris 2.5.1 so the uint$1_t typedef from
	  <sys/synch.h>, <pthread.h>, or <semaphore.h> is not used.
	  If the typedef was allowed, the #define below would cause a
	  syntax error.])])
    AC_DEFINE_UNQUOTED([uint$1_t], [$ac_cv_c_uint$1_t],
      [Define to the type of an unsigned integer type of width exactly $1 bits
       if such a type exists and the standard includes do not define it.]);;
  esac
])# _AC_TYPE_UNSIGNED_INT