# vsnprintf.m4 serial 7

dnl Copyright (C) 2002-2004, 2007-2020 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 Libintl 0.17 will replace vsnprintf only if it does not support %1$s,

dnl but defers to any gnulib vsnprintf replacements.  Therefore, gnulib

dnl must guarantee that the decision for replacing vsnprintf is a superset

dnl of the reasons checked by libintl.

AC_DEFUN([gl_FUNC_VSNPRINTF],

[

  AC_REQUIRE([gl_STDIO_H_DEFAULTS])

  gl_cv_func_vsnprintf_usable=no

  AC_CHECK_FUNCS([vsnprintf])

  if test $ac_cv_func_vsnprintf = yes; then

    gl_SNPRINTF_SIZE1

    case "$gl_cv_func_snprintf_size1" in

      *yes)

        gl_SNPRINTF_RETVAL_C99

        case "$gl_cv_func_snprintf_retval_c99" in

          *yes)

            gl_PRINTF_POSITIONS

            case "$gl_cv_func_printf_positions" in

              *yes)

                gl_cv_func_vsnprintf_usable=yes

                ;;

            esac

            ;;

        esac

        ;;

    esac

  fi

  if test $gl_cv_func_vsnprintf_usable = no; then

    gl_REPLACE_VSNPRINTF

  fi

  AC_CHECK_DECLS_ONCE([vsnprintf])

  if test $ac_cv_have_decl_vsnprintf = no; then

    HAVE_DECL_VSNPRINTF=0

  fi

])

AC_DEFUN([gl_REPLACE_VSNPRINTF],

[

  AC_REQUIRE([gl_STDIO_H_DEFAULTS])

  AC_LIBOBJ([vsnprintf])

  if test $ac_cv_func_vsnprintf = yes; then

    REPLACE_VSNPRINTF=1

  else

    AC_CHECK_DECLS_ONCE([vsnprintf])

    if test $ac_cv_have_decl_vsnprintf = yes; then

      dnl If the function is declared but does not appear to exist, it may be

      dnl defined as an inline function. In order to avoid a conflict, we have

      dnl to define rpl_vsnprintf, not vsnprintf.

      REPLACE_VSNPRINTF=1

    fi

  fi

  gl_PREREQ_VSNPRINTF

])

# Prerequisites of lib/vsnprintf.c.

AC_DEFUN([gl_PREREQ_VSNPRINTF], [:])