-- --
-- B o d y --
-- --
--- Copyright (C) 1992-2002 Free Software Foundation, Inc. --
+-- Copyright (C) 1992-2009, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
--- ware Foundation; either version 2, or (at your option) any later ver- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
--- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 59 Temple Place - Suite 330, Boston, --
--- MA 02111-1307, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
--- The body of Interfaces.COBOL is implementation independent (i.e. the
--- same version is used with all versions of GNAT). The specialization
--- to a particular COBOL format is completely contained in the private
--- part ot the spec.
+-- The body of Interfaces.COBOL is implementation independent (i.e. the same
+-- version is used with all versions of GNAT). The specialization to a
+-- particular COBOL format is completely contained in the private part of
+-- the spec.
with Interfaces; use Interfaces;
with System; use System;
-with Unchecked_Conversion;
+with Ada.Unchecked_Conversion;
package body Interfaces.COBOL is
subtype B8 is Byte_Array (1 .. 8);
-- Representations for 1,2,4,8 byte binary values
- function To_B1 is new Unchecked_Conversion (Integer_8, B1);
- function To_B2 is new Unchecked_Conversion (Integer_16, B2);
- function To_B4 is new Unchecked_Conversion (Integer_32, B4);
- function To_B8 is new Unchecked_Conversion (Integer_64, B8);
+ function To_B1 is new Ada.Unchecked_Conversion (Integer_8, B1);
+ function To_B2 is new Ada.Unchecked_Conversion (Integer_16, B2);
+ function To_B4 is new Ada.Unchecked_Conversion (Integer_32, B4);
+ function To_B8 is new Ada.Unchecked_Conversion (Integer_64, B8);
-- Conversions from native binary to external binary
- function From_B1 is new Unchecked_Conversion (B1, Integer_8);
- function From_B2 is new Unchecked_Conversion (B2, Integer_16);
- function From_B4 is new Unchecked_Conversion (B4, Integer_32);
- function From_B8 is new Unchecked_Conversion (B8, Integer_64);
+ function From_B1 is new Ada.Unchecked_Conversion (B1, Integer_8);
+ function From_B2 is new Ada.Unchecked_Conversion (B2, Integer_16);
+ function From_B4 is new Ada.Unchecked_Conversion (B4, Integer_32);
+ function From_B8 is new Ada.Unchecked_Conversion (B8, Integer_64);
-- Conversions from external binary to signed native binary
- function From_B1U is new Unchecked_Conversion (B1, Unsigned_8);
- function From_B2U is new Unchecked_Conversion (B2, Unsigned_16);
- function From_B4U is new Unchecked_Conversion (B4, Unsigned_32);
- function From_B8U is new Unchecked_Conversion (B8, Unsigned_64);
+ function From_B1U is new Ada.Unchecked_Conversion (B1, Unsigned_8);
+ function From_B2U is new Ada.Unchecked_Conversion (B2, Unsigned_16);
+ function From_B4U is new Ada.Unchecked_Conversion (B4, Unsigned_32);
+ function From_B8U is new Ada.Unchecked_Conversion (B8, Unsigned_64);
-- Conversions from external binary to unsigned native binary
-----------------------
function Binary_To_Decimal
(Item : Byte_Array;
- Format : Binary_Format)
- return Integer_64;
+ Format : Binary_Format) return Integer_64;
-- This function converts a numeric value in the given format to its
-- corresponding integer value. This is the non-generic implementation
-- of Decimal_Conversions.To_Decimal. The generic routine does the
function Numeric_To_Decimal
(Item : Numeric;
- Format : Display_Format)
- return Integer_64;
+ Format : Display_Format) return Integer_64;
-- This function converts a numeric value in the given format to its
-- corresponding integer value. This is the non-generic implementation
-- of Decimal_Conversions.To_Decimal. The generic routine does the
function Packed_To_Decimal
(Item : Packed_Decimal;
- Format : Packed_Format)
- return Integer_64;
+ Format : Packed_Format) return Integer_64;
-- This function converts a packed value in the given format to its
-- corresponding integer value. This is the non-generic implementation
-- of Decimal_Conversions.To_Decimal. The generic routine does the
function To_Display
(Item : Integer_64;
Format : Display_Format;
- Length : Natural)
- return Numeric;
+ Length : Natural) return Numeric;
-- This function converts the given integer value into display format,
-- using the given format, with the length in bytes of the result given
-- by the last parameter. This is the non-generic implementation of
function To_Packed
(Item : Integer_64;
Format : Packed_Format;
- Length : Natural)
- return Packed_Decimal;
+ Length : Natural) return Packed_Decimal;
-- This function converts the given integer value into packed format,
-- using the given format, with the length in digits of the result given
-- by the last parameter. This is the non-generic implementation of
function Valid_Numeric
(Item : Numeric;
- Format : Display_Format)
- return Boolean;
+ Format : Display_Format) return Boolean;
-- This is the non-generic implementation of Decimal_Conversions.Valid
-- for the display case.
function Valid_Packed
(Item : Packed_Decimal;
- Format : Packed_Format)
- return Boolean;
+ Format : Packed_Format) return Boolean;
-- This is the non-generic implementation of Decimal_Conversions.Valid
-- for the packed case.
function Binary_To_Decimal
(Item : Byte_Array;
- Format : Binary_Format)
- return Integer_64
+ Format : Binary_Format) return Integer_64
is
Len : constant Natural := Item'Length;
-- Numeric_To_Decimal --
------------------------
- -- The following assumptions are made in the coding of this routine
+ -- The following assumptions are made in the coding of this routine:
-- The range of COBOL_Digits is compact and the ten values
-- represent the digits 0-9 in sequence
-- The COBOL_Minus_Digits set is disjoint from COBOL_Digits
- -- These assumptions are true for all COBOL representations we know of.
+ -- These assumptions are true for all COBOL representations we know of
function Numeric_To_Decimal
(Item : Numeric;
- Format : Display_Format)
- return Integer_64
+ Format : Display_Format) return Integer_64
is
pragma Unsuppress (Range_Check);
Sign : COBOL_Character := COBOL_Plus;
function Packed_To_Decimal
(Item : Packed_Decimal;
- Format : Packed_Format)
- return Integer_64
+ Format : Packed_Format) return Integer_64
is
pragma Unsuppress (Range_Check);
Result : Integer_64 := 0;
-- Here a swap is needed
declare
- Len : constant Natural := B'Length;
+ Len : constant Natural := B'Length;
begin
for J in 1 .. Len / 2 loop
function To_Display
(Item : Integer_64;
Format : Display_Format;
- Length : Natural)
- return Numeric
+ Length : Natural) return Numeric
is
Result : Numeric (1 .. Length);
Val : Integer_64 := Item;
-- Used for the nonseparate formats to embed the appropriate sign
-- at the specified location (i.e. at Result (Loc))
+ -------------
+ -- Convert --
+ -------------
+
procedure Convert (First, Last : Natural) is
- J : Natural := Last;
+ J : Natural;
begin
+ J := Last;
while J >= First loop
Result (J) :=
COBOL_Character'Val
raise Conversion_Error;
end Convert;
+ ----------------
+ -- Embed_Sign --
+ ----------------
+
procedure Embed_Sign (Loc : Natural) is
Digit : Natural range 0 .. 9;
function To_Packed
(Item : Integer_64;
Format : Packed_Format;
- Length : Natural)
- return Packed_Decimal
+ Length : Natural) return Packed_Decimal
is
Result : Packed_Decimal (1 .. Length);
Val : Integer_64;
-- storing the result in Result (First .. Last). Raise Conversion_Error
-- if the value is too large to fit.
+ -------------
+ -- Convert --
+ -------------
+
procedure Convert (First, Last : Natural) is
J : Natural := Last;
function Valid_Numeric
(Item : Numeric;
- Format : Display_Format)
- return Boolean
+ Format : Display_Format) return Boolean
is
begin
+ if Item'Length = 0 then
+ return False;
+ end if;
+
-- All character positions except first and last must be Digits.
-- This is true for all the formats.
function Valid_Packed
(Item : Packed_Decimal;
- Format : Packed_Format)
- return Boolean
+ Format : Packed_Format) return Boolean
is
begin
case Packed_Representation is
-- Note that the tests here are all compile time tests
function Length (Format : Binary_Format) return Natural is
- pragma Warnings (Off, Format);
-
+ pragma Unreferenced (Format);
begin
if Num'Digits <= 2 then
return 1;
-
elsif Num'Digits <= 4 then
return 2;
-
elsif Num'Digits <= 9 then
return 4;
-
else -- Num'Digits in 10 .. 18
return 8;
end if;
-- Note that the tests here are all compile time checks
function Length
- (Format : Packed_Format)
- return Natural
+ (Format : Packed_Format) return Natural
is
- pragma Warnings (Off, Format);
-
+ pragma Unreferenced (Format);
begin
case Packed_Representation is
when IBM =>
function To_Binary
(Item : Num;
- Format : Binary_Format)
- return Byte_Array
+ Format : Binary_Format) return Byte_Array
is
begin
-- Note: all these tests are compile time tests
pragma Unsuppress (Range_Check);
begin
return Binary'Integer_Value (Item);
-
exception
when Constraint_Error =>
raise Conversion_Error;
function To_Decimal
(Item : Byte_Array;
- Format : Binary_Format)
- return Num
+ Format : Binary_Format) return Num
is
pragma Unsuppress (Range_Check);
-
begin
return Num'Fixed_Value (Binary_To_Decimal (Item, Format));
-
exception
when Constraint_Error =>
raise Conversion_Error;
function To_Decimal (Item : Binary) return Num is
pragma Unsuppress (Range_Check);
-
begin
return Num'Fixed_Value (Item);
-
exception
when Constraint_Error =>
raise Conversion_Error;
function To_Decimal
(Item : Numeric;
- Format : Display_Format)
- return Num
+ Format : Display_Format) return Num
is
pragma Unsuppress (Range_Check);
begin
return Num'Fixed_Value (Numeric_To_Decimal (Item, Format));
-
exception
when Constraint_Error =>
raise Conversion_Error;
function To_Decimal (Item : Long_Binary) return Num is
pragma Unsuppress (Range_Check);
-
begin
return Num'Fixed_Value (Item);
-
exception
when Constraint_Error =>
raise Conversion_Error;
function To_Decimal
(Item : Packed_Decimal;
- Format : Packed_Format)
- return Num
+ Format : Packed_Format) return Num
is
pragma Unsuppress (Range_Check);
-
begin
return Num'Fixed_Value (Packed_To_Decimal (Item, Format));
-
exception
when Constraint_Error =>
raise Conversion_Error;
function To_Display
(Item : Num;
- Format : Display_Format)
- return Numeric
+ Format : Display_Format) return Numeric
is
pragma Unsuppress (Range_Check);
-
begin
return
To_Display
(Integer_64'Integer_Value (Item),
Format,
Length (Format));
-
exception
when Constraint_Error =>
raise Conversion_Error;
function To_Long_Binary (Item : Num) return Long_Binary is
pragma Unsuppress (Range_Check);
-
begin
return Long_Binary'Integer_Value (Item);
-
exception
when Constraint_Error =>
raise Conversion_Error;
function To_Packed
(Item : Num;
- Format : Packed_Format)
- return Packed_Decimal
+ Format : Packed_Format) return Packed_Decimal
is
pragma Unsuppress (Range_Check);
-
begin
return
To_Packed
(Integer_64'Integer_Value (Item),
Format,
Length (Format));
-
exception
when Constraint_Error =>
raise Conversion_Error;
function Valid
(Item : Byte_Array;
- Format : Binary_Format)
- return Boolean
+ Format : Binary_Format) return Boolean
is
Val : Num;
pragma Unreferenced (Val);
-
begin
Val := To_Decimal (Item, Format);
return True;
-
exception
when Conversion_Error =>
return False;
function Valid
(Item : Numeric;
- Format : Display_Format)
- return Boolean
+ Format : Display_Format) return Boolean
is
begin
return Valid_Numeric (Item, Format);
function Valid
(Item : Packed_Decimal;
- Format : Packed_Format)
- return Boolean
+ Format : Packed_Format) return Boolean
is
begin
return Valid_Packed (Item, Format);
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