# strtoimax.m4 serial 14

dnl Copyright (C) 2002-2004, 2006, 2009-2017 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.

AC_DEFUN([gl_FUNC_STRTOIMAX],

[

  AC_REQUIRE([gl_INTTYPES_H_DEFAULTS])

  dnl On OSF/1 5.1 with cc, this function is declared but not defined.

  AC_CHECK_FUNCS_ONCE([strtoimax])

  AC_CHECK_DECLS_ONCE([strtoimax])

  if test "$ac_cv_have_decl_strtoimax" != yes; then

    HAVE_DECL_STRTOIMAX=0

  fi

  if test "$ac_cv_func_strtoimax" = yes; then

    HAVE_STRTOIMAX=1

    dnl On AIX 5.1, strtoimax() fails for values outside the 'int' range.

    AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles

    AC_CACHE_CHECK([whether strtoimax works], [gl_cv_func_strtoimax],

      [AC_RUN_IFELSE(

         [AC_LANG_SOURCE([[

#include <errno.h>

#include <string.h>

#include <inttypes.h>

int main ()

{

  if (sizeof (intmax_t) > sizeof (int))

    {

      const char *s = "4294967295";

      char *p;

      intmax_t res;

      errno = 0;

      res = strtoimax (s, &p, 10);

      if (p != s + strlen (s))

        return 1;

      if (errno != 0)

        return 2;

      if (res != (intmax_t) 65535 * (intmax_t) 65537)

        return 3;

    }

  else

    {

      const char *s = "2147483647";

      char *p;

      intmax_t res;

      errno = 0;

      res = strtoimax (s, &p, 10);

      if (p != s + strlen (s))

        return 1;

      if (errno != 0)

        return 2;

      if (res != 2147483647)

        return 3;

    }

  return 0;

}

]])],

         [gl_cv_func_strtoimax=yes],

         [gl_cv_func_strtoimax=no],

         [case "$host_os" in

                   # Guess no on AIX 5.

            aix5*) gl_cv_func_strtoimax="guessing no" ;;

                   # Guess yes otherwise.

            *)     gl_cv_func_strtoimax="guessing yes" ;;

          esac

         ])

      ])

    case "$gl_cv_func_strtoimax" in

      *no) REPLACE_STRTOIMAX=1 ;;

    esac

  else

    if test "$ac_cv_have_decl_strtoimax" = yes; then

      # HP-UX 11.11 has "#define strtoimax(...) ..." but no function.

      REPLACE_STRTOIMAX=1

    fi

    HAVE_STRTOIMAX=0

  fi

])

# Prerequisites of lib/strtoimax.c.

AC_DEFUN([gl_PREREQ_STRTOIMAX], [

  AC_CHECK_DECLS([strtoll])

  AC_REQUIRE([AC_TYPE_LONG_LONG_INT])

])