# inttypes.m4 serial 29

dnl Copyright (C) 2006-2020 Free Software Foundation, Inc.

dnl This file is free software; the Free Software Foundation

dnl gives unlimited permission to copy and/or distribute it,

dnl with or without modifications, as long as this notice is preserved.

dnl From Derek Price, Bruno Haible.

dnl Test whether <inttypes.h> is supported or must be substituted.

AC_DEFUN([gl_INTTYPES_H],

[

  AC_REQUIRE([gl_INTTYPES_INCOMPLETE])

  gl_INTTYPES_PRI_SCN

])

AC_DEFUN_ONCE([gl_INTTYPES_INCOMPLETE],

[

  AC_REQUIRE([gl_STDINT_H])

  AC_CHECK_HEADERS_ONCE([inttypes.h])

  dnl Override <inttypes.h> always, so that the portability warnings work.

  AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])

  gl_CHECK_NEXT_HEADERS([inttypes.h])

  AC_REQUIRE([gl_MULTIARCH])

  dnl Check for declarations of anything we want to poison if the

  dnl corresponding gnulib module is not in use.

  gl_WARN_ON_USE_PREPARE([[#include <inttypes.h>

    ]], [imaxabs imaxdiv strtoimax strtoumax])

  AC_REQUIRE([AC_C_RESTRICT])

])

# Ensure that the PRI* and SCN* macros are defined appropriately.

AC_DEFUN([gl_INTTYPES_PRI_SCN],

[

  AC_REQUIRE([gt_INTTYPES_PRI])

  PRIPTR_PREFIX=

  if test -n "$STDINT_H"; then

    dnl Using the gnulib <stdint.h>. It always defines intptr_t to 'long'.

    PRIPTR_PREFIX='"l"'

  else

    dnl Using the system's <stdint.h>.

    for glpfx in '' l ll I64; do

      case $glpfx in

        '')  gltype1='int';;

        l)   gltype1='long int';;

        ll)  gltype1='long long int';;

        I64) gltype1='__int64';;

      esac

      AC_COMPILE_IFELSE(

        [AC_LANG_PROGRAM([[#include <stdint.h>

           extern intptr_t foo;

           extern $gltype1 foo;]])],

        [PRIPTR_PREFIX='"'$glpfx'"'])

      test -n "$PRIPTR_PREFIX" && break

    done

  fi

  AC_SUBST([PRIPTR_PREFIX])

  gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(

    [INT32_MAX_LT_INTMAX_MAX],

    [defined INT32_MAX && defined INTMAX_MAX],

    [INT32_MAX < INTMAX_MAX],

    [sizeof (int) < sizeof (long long int)])

  if test $APPLE_UNIVERSAL_BUILD = 0; then

    gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(

      [INT64_MAX_EQ_LONG_MAX],

      [defined INT64_MAX],

      [INT64_MAX == LONG_MAX],

      [sizeof (long long int) == sizeof (long int)])

  else

    INT64_MAX_EQ_LONG_MAX=-1

  fi

  gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(

    [UINT32_MAX_LT_UINTMAX_MAX],

    [defined UINT32_MAX && defined UINTMAX_MAX],

    [UINT32_MAX < UINTMAX_MAX],

    [sizeof (unsigned int) < sizeof (unsigned long long int)])

  if test $APPLE_UNIVERSAL_BUILD = 0; then

    gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION(

      [UINT64_MAX_EQ_ULONG_MAX],

      [defined UINT64_MAX],

      [UINT64_MAX == ULONG_MAX],

      [sizeof (unsigned long long int) == sizeof (unsigned long int)])

  else

    UINT64_MAX_EQ_ULONG_MAX=-1

  fi

])

# Define the symbol $1 to be 1 if the condition is true, 0 otherwise.

# If $2 is true, the condition is $3; otherwise if long long int is supported

# approximate the condition with $4; otherwise, assume the condition is false.

# The condition should work on all C99 platforms; the approximations should be

# good enough to work on all practical pre-C99 platforms.

# $2 is evaluated by the C preprocessor, $3 and $4 as compile-time constants.

AC_DEFUN([gl_INTTYPES_CHECK_LONG_LONG_INT_CONDITION],

[

  AC_CACHE_CHECK([whether $3],

    [gl_cv_test_$1],

    [AC_COMPILE_IFELSE(

       [AC_LANG_PROGRAM(

          [[/* Work also in C++ mode.  */

            #define __STDC_LIMIT_MACROS 1

            /* Work if build is not clean.  */

            #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H

            #include <limits.h>

            #if HAVE_STDINT_H

             #include <stdint.h>

            #endif

            #if $2

             #define CONDITION ($3)

            #else

             #define CONDITION ($4)

            #endif

            int test[CONDITION ? 1 : -1];]])],

       [gl_cv_test_$1=yes],

       [gl_cv_test_$1=no])])

  if test $gl_cv_test_$1 = yes; then

    $1=1;

  else

    $1=0;

  fi

  AC_SUBST([$1])

])

AC_DEFUN([gl_INTTYPES_MODULE_INDICATOR],

[

  dnl Use AC_REQUIRE here, so that the default settings are expanded once only.

  AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])

  gl_MODULE_INDICATOR_SET_VARIABLE([$1])

])

AC_DEFUN([gl_INTTYPES_H_DEFAULTS],

[

  GNULIB_IMAXABS=0;      AC_SUBST([GNULIB_IMAXABS])

  GNULIB_IMAXDIV=0;      AC_SUBST([GNULIB_IMAXDIV])

  GNULIB_STRTOIMAX=0;    AC_SUBST([GNULIB_STRTOIMAX])

  GNULIB_STRTOUMAX=0;    AC_SUBST([GNULIB_STRTOUMAX])

  dnl Assume proper GNU behavior unless another module says otherwise.

  HAVE_DECL_IMAXABS=1;   AC_SUBST([HAVE_DECL_IMAXABS])

  HAVE_DECL_IMAXDIV=1;   AC_SUBST([HAVE_DECL_IMAXDIV])

  HAVE_DECL_STRTOIMAX=1; AC_SUBST([HAVE_DECL_STRTOIMAX])

  HAVE_DECL_STRTOUMAX=1; AC_SUBST([HAVE_DECL_STRTOUMAX])

  HAVE_IMAXDIV_T=1;      AC_SUBST([HAVE_IMAXDIV_T])

  REPLACE_STRTOIMAX=0;   AC_SUBST([REPLACE_STRTOIMAX])

  REPLACE_STRTOUMAX=0;   AC_SUBST([REPLACE_STRTOUMAX])

  INT32_MAX_LT_INTMAX_MAX=1;  AC_SUBST([INT32_MAX_LT_INTMAX_MAX])

  INT64_MAX_EQ_LONG_MAX='defined _LP64';  AC_SUBST([INT64_MAX_EQ_LONG_MAX])

  PRI_MACROS_BROKEN=0;   AC_SUBST([PRI_MACROS_BROKEN])

  PRIPTR_PREFIX=__PRIPTR_PREFIX;  AC_SUBST([PRIPTR_PREFIX])

  UINT32_MAX_LT_UINTMAX_MAX=1;  AC_SUBST([UINT32_MAX_LT_UINTMAX_MAX])

  UINT64_MAX_EQ_ULONG_MAX='defined _LP64';  AC_SUBST([UINT64_MAX_EQ_ULONG_MAX])

])