138 lines
4.9 KiB
Ada
138 lines
4.9 KiB
Ada
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------------------------------------------------------------------------------
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-- --
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-- GNAT RUN-TIME COMPONENTS --
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-- --
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-- A D A . T E X T _ I O . E N U M E R A T I O N _ I O --
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-- --
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-- B o d y --
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-- --
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-- Copyright (C) 1992-2015, Free Software Foundation, Inc. --
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-- --
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-- GNAT is free software; you can redistribute it and/or modify it under --
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-- terms of the GNU General Public License as published by the Free Soft- --
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-- ware Foundation; either version 3, or (at your option) any later ver- --
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-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
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-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
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-- or FITNESS FOR A PARTICULAR PURPOSE. --
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-- --
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-- As a special exception under Section 7 of GPL version 3, you are granted --
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-- additional permissions described in the GCC Runtime Library Exception, --
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-- version 3.1, as published by the Free Software Foundation. --
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-- --
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-- You should have received a copy of the GNU General Public License and --
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-- a copy of the GCC Runtime Library Exception along with this program; --
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-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
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-- <http://www.gnu.org/licenses/>. --
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-- --
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-- GNAT was originally developed by the GNAT team at New York University. --
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-- Extensive contributions were provided by Ada Core Technologies Inc. --
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-- --
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------------------------------------------------------------------------------
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with Ada.Text_IO.Enumeration_Aux;
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package body Ada.Text_IO.Enumeration_IO is
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package Aux renames Ada.Text_IO.Enumeration_Aux;
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---------
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-- Get --
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---------
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procedure Get (File : File_Type; Item : out Enum) is
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Buf : String (1 .. Enum'Width + 1);
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Buflen : Natural;
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begin
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Aux.Get_Enum_Lit (File, Buf, Buflen);
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declare
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Buf_Str : String renames Buf (1 .. Buflen);
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pragma Unsuppress (Range_Check);
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begin
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Item := Enum'Value (Buf_Str);
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end;
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exception
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when Constraint_Error => raise Data_Error;
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end Get;
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procedure Get (Item : out Enum) is
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pragma Unsuppress (Range_Check);
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begin
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Get (Current_In, Item);
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end Get;
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procedure Get
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(From : String;
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Item : out Enum;
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Last : out Positive)
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is
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Start : Natural;
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begin
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Aux.Scan_Enum_Lit (From, Start, Last);
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declare
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From_Str : String renames From (Start .. Last);
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pragma Unsuppress (Range_Check);
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begin
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Item := Enum'Value (From_Str);
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end;
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exception
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when Constraint_Error => raise Data_Error;
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end Get;
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---------
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-- Put --
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---------
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procedure Put
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(File : File_Type;
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Item : Enum;
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Width : Field := Default_Width;
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Set : Type_Set := Default_Setting)
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is
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begin
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-- Ensure that Item is valid before attempting to retrieve the Image, to
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-- prevent the possibility of out-of-bounds addressing of index or image
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-- tables. Units in the run-time library are normally compiled with
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-- checks suppressed, which includes instantiated generics.
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if not Item'Valid then
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raise Constraint_Error with "invalid enumeration value";
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end if;
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Aux.Put (File, Enum'Image (Item), Width, Set);
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end Put;
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procedure Put
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(Item : Enum;
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Width : Field := Default_Width;
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Set : Type_Set := Default_Setting)
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is
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begin
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Put (Current_Out, Item, Width, Set);
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end Put;
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procedure Put
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(To : out String;
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Item : Enum;
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Set : Type_Set := Default_Setting)
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is
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begin
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-- Ensure that Item is valid before attempting to retrieve the Image, to
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-- prevent the possibility of out-of-bounds addressing of index or image
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-- tables. Units in the run-time library are normally compiled with
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-- checks suppressed, which includes instantiated generics.
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if not Item'Valid then
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raise Constraint_Error with "invalid enumeration value";
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end if;
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Aux.Puts (To, Enum'Image (Item), Set);
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end Put;
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end Ada.Text_IO.Enumeration_IO;
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