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-- Common types.
-- Copyright (C) 2002, 2003, 2004, 2005 Tristan Gingold
--
-- GHDL is free software; you can redistribute it and/or modify it under
-- the terms of the GNU General Public License as published by the Free
-- Software Foundation; either version 2, or (at your option) any later
-- version.
--
-- GHDL is distributed in the hope that it will be useful, but WITHOUT 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
-- along with GCC; see the file COPYING. If not, write to the Free
-- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
-- 02111-1307, USA.
with Interfaces;
package Types is
pragma Preelaborate (Types);
-- List of vhdl standards.
-- VHDL_93c is vhdl_93 with backward compatibility with 87 (file).
type Vhdl_Std_Type is (Vhdl_87, Vhdl_93c, Vhdl_93, Vhdl_00, Vhdl_02);
-- A tri state type.
type Tri_State_Type is (Unknown, False, True);
-- 32 bits integer.
type Int32 is range -2**31 .. 2**31 - 1;
for Int32'Size use 32;
subtype Nat32 is Int32 range 0 .. Int32'Last;
type Uns32 is new Interfaces.Unsigned_32;
type Fp64 is new Interfaces.IEEE_Float_64;
-- iir_int32 is aimed at containing integer literal values.
type Iir_Int32 is new Interfaces.Integer_32;
-- iir_int64 is aimed at containing units values.
type Iir_Int64 is new Interfaces.Integer_64;
-- iir_fp32 is aimed at containing floating point values.
type Iir_Fp32 is new Interfaces.IEEE_Float_32;
-- iir_fp64 is aimed at containing floating point values.
subtype Iir_Fp64 is Fp64;
-- iir_index32 is aimed at containing an array index.
type Iir_Index32 is new Nat32;
-- Useful type.
type String_Acc is access String;
type String_Cst is access constant String;
type String_Acc_Array is array (Natural range <>) of String_Acc;
subtype String_Fat is String (Positive);
type String_Fat_Acc is access String_Fat;
-- Array of iir_int32.
-- Used by recording feature of scan.
type Iir_Int32_Array is array (Natural range <>) of Iir_Int32;
type Iir_Int32_Array_Acc is access Iir_Int32_Array;
-- Type of a name table element.
-- The name table is defined in the name_table package.
type Name_Id is new Nat32;
-- null entry in the name table.
-- It is sure that this entry is never allocated.
Null_Identifier: constant Name_Id := 0;
-- Type of a string stored into the string table.
type String_Id is new Nat32;
for String_Id'Size use 32;
Null_String : constant String_Id := 0;
-- Index type is the source file table.
-- This table is defined in the files_map package.
type Source_File_Entry is new Nat32;
No_Source_File_Entry: constant Source_File_Entry := 0;
-- FIXME: additional source file entries to create:
-- *std.standard*: for those created in std.standard
-- *error*: for erroneous one
-- *command-line*: used for identifiers from command line
-- (eg: unit to elab)
-- Index into a file buffer.
type Source_Ptr is new Int32;
-- Lower boundary of any file buffer.
Source_Ptr_Org : constant Source_Ptr := 0;
-- Bad file buffer index (used to mark no line).
Source_Ptr_Bad : constant Source_Ptr := -1;
-- This type contains everything necessary to get a file name, a line
-- number and a column number.
type Location_Type is new Nat32;
for Location_Type'Size use 32;
Location_Nil : constant Location_Type := 0;
-- Type of a file buffer.
type File_Buffer is array (Source_Ptr range <>) of Character;
type File_Buffer_Acc is access File_Buffer;
-- Indentation.
-- This is used by all packages that display vhdl code or informations.
Indentation : constant := 2;
-- String representing a date/time (format is YYYYMMDDHHmmSS.sss).
subtype Time_Stamp_String is String (1 .. 18);
type Time_Stamp_Id is new String_Id;
Null_Time_Stamp : constant Time_Stamp_Id := 0;
-- Self-explaining: raised when an internal error (such as consistency)
-- is detected.
Internal_Error: exception;
-- In some case, a low level subprogram can't handle error
-- (e.g eval_pos). In this case it is easier to raise an exception and
-- let upper level subprograms handle the case.
Node_Error : exception;
end Types;
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