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-- GHDL Run Time (GRT) - 'image subprograms.
-- 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 System; use System;
with System.Storage_Elements; -- Work around GNAT bug.
with Ada.Unchecked_Conversion;
with Grt.Processes; use Grt.Processes;
with Grt.Vstrings; use Grt.Vstrings;
package body Grt.Images is
function To_Std_String_Basep is new Ada.Unchecked_Conversion
(Source => System.Address, Target => Std_String_Basep);
function To_Std_String_Boundp is new Ada.Unchecked_Conversion
(Source => System.Address, Target => Std_String_Boundp);
procedure Return_String (Res : Std_String_Ptr; Str : String)
is
begin
Res.Base := To_Std_String_Basep (Ghdl_Stack2_Allocate (Str'Length));
Res.Bounds := To_Std_String_Boundp
(Ghdl_Stack2_Allocate (Std_String_Bound'Size / System.Storage_Unit));
for I in 0 .. Str'Length - 1 loop
Res.Base (Ghdl_Index_Type (I)) := Str (Str'First + I);
end loop;
Res.Bounds.Dim_1 := (Left => 1,
Right => Str'Length,
Dir => Dir_To,
Length => Str'Length);
end Return_String;
procedure Return_Enum
(Res : Std_String_Ptr; Rti : Ghdl_Rti_Access; Index : Ghdl_Index_Type)
is
Enum_Rti : Ghdl_Rtin_Type_Enum_Acc;
Str : Ghdl_C_String;
begin
Enum_Rti := To_Ghdl_Rtin_Type_Enum_Acc (Rti);
Str := Enum_Rti.Names (Index);
Return_String (Res, Str (1 .. strlen (Str)));
end Return_Enum;
procedure Ghdl_Image_B2
(Res : Std_String_Ptr; Val : Ghdl_B2; Rti : Ghdl_Rti_Access)
is
begin
Return_Enum (Res, Rti, Ghdl_B2'Pos (Val));
end Ghdl_Image_B2;
procedure Ghdl_Image_E8
(Res : Std_String_Ptr; Val : Ghdl_E8; Rti : Ghdl_Rti_Access)
is
begin
Return_Enum (Res, Rti, Ghdl_E8'Pos (Val));
end Ghdl_Image_E8;
procedure Ghdl_Image_I32 (Res : Std_String_Ptr; Val : Ghdl_I32)
is
Str : String (1 .. 11);
First : Natural;
begin
To_String (Str, First, Val);
Return_String (Res, Str (First .. Str'Last));
end Ghdl_Image_I32;
procedure Ghdl_Image_P64
(Res : Std_String_Ptr; Val : Ghdl_I64; Rti : Ghdl_Rti_Access)
is
Str : String (1 .. 21);
First : Natural;
Unit : Ghdl_C_String;
Phys : Ghdl_Rtin_Type_Physical_Acc;
Unit_Len : Natural;
begin
To_String (Str, First, Val);
Phys := To_Ghdl_Rtin_Type_Physical_Acc (Rti);
Unit := To_Ghdl_Rtin_Unit_Acc (Phys.Units (0)).Name;
Unit_Len := strlen (Unit);
declare
L : Natural := Str'Last + 1 - First;
Str2 : String (1 .. L + 1 + Unit_Len);
begin
Str2 (1 .. L) := Str (First .. Str'Last);
Str2 (L + 1) := ' ';
Str2 (L + 2 .. Str2'Last) := Unit (1 .. Unit_Len);
Return_String (Res, Str2);
end;
end Ghdl_Image_P64;
procedure Ghdl_Image_P32
(Res : Std_String_Ptr; Val : Ghdl_I32; Rti : Ghdl_Rti_Access)
is
Str : String (1 .. 11);
First : Natural;
Unit : Ghdl_C_String;
Phys : Ghdl_Rtin_Type_Physical_Acc;
Unit_Len : Natural;
begin
To_String (Str, First, Val);
Phys := To_Ghdl_Rtin_Type_Physical_Acc (Rti);
Unit := To_Ghdl_Rtin_Unit_Acc (Phys.Units (0)).Name;
Unit_Len := strlen (Unit);
declare
L : Natural := Str'Last + 1 - First;
Str2 : String (1 .. L + 1 + Unit_Len);
begin
Str2 (1 .. L) := Str (First .. Str'Last);
Str2 (L + 1) := ' ';
Str2 (L + 2 .. Str2'Last) := Unit (1 .. Unit_Len);
Return_String (Res, Str2);
end;
end Ghdl_Image_P32;
procedure Ghdl_Image_F64 (Res : Std_String_Ptr; Val : Ghdl_F64)
is
function Trunc (V : Ghdl_F64) return Ghdl_F64;
pragma Import (C, Trunc);
-- Sign (1) + digit (1) + dot (1) + digits (15) + exp (1) + sign (1)
-- + exp_digits (4) -> 24.
Str : String (1 .. 25);
P : Natural;
V : Ghdl_F64;
Vmax : Ghdl_F64;
Vd : Ghdl_F64;
Exp : Integer;
D : Integer;
B : Boolean;
begin
-- Handle sign.
if Val < 0.0 then
Str (1) := '-';
P := 1;
V := -Val;
else
P := 0;
V := Val;
end if;
-- Compute the mantissa.
-- and normalize V in [0 .. 10.0[
-- FIXME: should do a dichotomy.
if V = 0.0 then
Exp := 0;
elsif V < 1.0 then
Exp := 0;
loop
exit when V >= 1.0;
Exp := Exp - 1;
V := V * 10.0;
end loop;
else
Exp := 0;
loop
exit when V < 10.0;
Exp := Exp + 1;
V := V / 10.0;
end loop;
end if;
Vmax := 10.0 ** (1 - 15);
for I in 0 .. 15 loop
-- Vd := Ghdl_F64'Truncation (V);
Vd := Trunc (V);
P := P + 1;
Str (P) := Character'Val (48 + Integer (Vd));
V := (V - Vd) * 10.0;
if I = 0 then
P := P + 1;
Str (P) := '.';
end if;
exit when I > 0 and V < Vmax;
Vmax := Vmax * 10.0;
end loop;
if Exp /= 0 then
-- LRM93 14.3
-- if the exponent is present, the `e' is written as a lower case
-- character.
P := P + 1;
Str (P) := 'e';
if Exp < 0 then
P := P + 1;
Str (P) := '-';
Exp := -Exp;
end if;
B := False;
for I in 0 .. 4 loop
D := (Exp / 10000) mod 10;
if D /= 0 or B or I = 4 then
P := P + 1;
Str (P) := Character'Val (48 + D);
B := True;
end if;
Exp := (Exp - D * 10000) * 10;
end loop;
end if;
Return_String (Res, Str (1 .. P));
end Ghdl_Image_F64;
-- procedure Ghdl_Image_F64 (Res : Std_String_Ptr; Val : Ghdl_F64)
-- is
-- -- Sign (1) + digit (1) + dot (1) + digits (15) + exp (1) + sign (1)
-- -- + exp_digits (4) -> 24.
-- Str : String (1 .. 25);
-- procedure Snprintf_G (Str : System.Address;
-- Size : Integer;
-- Arg : Ghdl_F64);
-- pragma Import (C, Snprintf_G, "__ghdl_snprintf_g");
-- function strlen (Str : System.Address) return Integer;
-- pragma Import (C, strlen);
-- begin
-- Snprintf_G (Str'Address, Str'Length, Val);
-- Return_String (Res, Str (1 .. strlen (Str'Address)));
-- end Ghdl_Image_F64;
end Grt.Images;
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