# vsnprintf-posix.m4 serial 15

dnl Copyright (C) 2007-2018 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_VSNPRINTF_POSIX],

[

  AC_REQUIRE([gl_PRINTF_SIZES_C99])

  AC_REQUIRE([gl_PRINTF_LONG_DOUBLE])

  AC_REQUIRE([gl_PRINTF_INFINITE])

  AC_REQUIRE([gl_PRINTF_INFINITE_LONG_DOUBLE])

  AC_REQUIRE([gl_PRINTF_DIRECTIVE_A])

  AC_REQUIRE([gl_PRINTF_DIRECTIVE_F])

  AC_REQUIRE([gl_PRINTF_DIRECTIVE_N])

  AC_REQUIRE([gl_PRINTF_DIRECTIVE_LS])

  AC_REQUIRE([gl_PRINTF_POSITIONS])

  AC_REQUIRE([gl_PRINTF_FLAG_GROUPING])

  AC_REQUIRE([gl_PRINTF_FLAG_LEFTADJUST])

  AC_REQUIRE([gl_PRINTF_FLAG_ZERO])

  AC_REQUIRE([gl_PRINTF_PRECISION])

  AC_REQUIRE([gl_PRINTF_ENOMEM])

  gl_cv_func_vsnprintf_posix=no

  AC_CHECK_FUNCS([vsnprintf])

  if test $ac_cv_func_vsnprintf = yes; then

    dnl These tests use vsnprintf() if snprintf() does not exist.

    gl_SNPRINTF_TRUNCATION_C99

    gl_SNPRINTF_RETVAL_C99

    gl_SNPRINTF_DIRECTIVE_N

    gl_SNPRINTF_SIZE1

    gl_VSNPRINTF_ZEROSIZE_C99

    case "$gl_cv_func_printf_sizes_c99" in

      *yes)

        case "$gl_cv_func_printf_long_double" in

          *yes)

            case "$gl_cv_func_printf_infinite" in

              *yes)

                case "$gl_cv_func_printf_infinite_long_double" in

                  *yes)

                    case "$gl_cv_func_printf_directive_a" in

                      *yes)

                        case "$gl_cv_func_printf_directive_f" in

                          *yes)

                            case "$gl_cv_func_printf_directive_n" in

                              *yes)

                                case "$gl_cv_func_printf_directive_ls" in

                                  *yes)

                                    case "$gl_cv_func_printf_positions" in

                                      *yes)

                                        case "$gl_cv_func_printf_flag_grouping" in

                                          *yes)

                                            case "$gl_cv_func_printf_flag_leftadjust" in

                                              *yes)

                                                case "$gl_cv_func_printf_flag_zero" in

                                                  *yes)

                                                    case "$gl_cv_func_printf_precision" in

                                                      *yes)

                                                        case "$gl_cv_func_printf_enomem" in

                                                          *yes)

                                                            case "$gl_cv_func_snprintf_truncation_c99" in

                                                              *yes)

                                                                case "$gl_cv_func_snprintf_retval_c99" in

                                                                  *yes)

                                                                    case "$gl_cv_func_snprintf_directive_n" in

                                                                      *yes)

                                                                        case "$gl_cv_func_snprintf_size1" in

                                                                          *yes)

                                                                            case "$gl_cv_func_vsnprintf_zerosize_c99" in

                                                                              *yes)

                                                                                # vsnprintf exists and is

                                                                                # already POSIX compliant.

                                                                                gl_cv_func_vsnprintf_posix=yes

                                                                                ;;

                                                                            esac

                                                                            ;;

                                                                        esac

                                                                        ;;

                                                                    esac

                                                                    ;;

                                                                esac

                                                                ;;

                                                            esac

                                                            ;;

                                                        esac

                                                        ;;

                                                    esac

                                                    ;;

                                                esac

                                                ;;

                                            esac

                                            ;;

                                        esac

                                        ;;

                                    esac

                                    ;;

                                esac

                                ;;

                            esac

                            ;;

                        esac

                        ;;

                    esac

                    ;;

                esac

                ;;

            esac

            ;;

        esac

        ;;

    esac

  fi

  if test $gl_cv_func_vsnprintf_posix = no; then

    gl_PREREQ_VASNPRINTF_LONG_DOUBLE

    gl_PREREQ_VASNPRINTF_INFINITE_DOUBLE

    gl_PREREQ_VASNPRINTF_INFINITE_LONG_DOUBLE

    gl_PREREQ_VASNPRINTF_DIRECTIVE_A

    gl_PREREQ_VASNPRINTF_DIRECTIVE_F

    gl_PREREQ_VASNPRINTF_DIRECTIVE_LS

    gl_PREREQ_VASNPRINTF_FLAG_GROUPING

    gl_PREREQ_VASNPRINTF_FLAG_LEFTADJUST

    gl_PREREQ_VASNPRINTF_FLAG_ZERO

    gl_PREREQ_VASNPRINTF_PRECISION

    gl_PREREQ_VASNPRINTF_ENOMEM

    gl_REPLACE_VASNPRINTF

    gl_REPLACE_VSNPRINTF

  fi

])