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-- GHDL Run Time (GRT) - 'image subprograms.
-- Copyright (C) 2002 - 2014 Tristan Gingold
--
-- This program 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 of the License, or
-- (at your option) any later version.
--
-- This program 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 this program. If not, see <gnu.org/licenses>.
--
-- 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.
with Interfaces;
with Grt.Fcvt;
package body Grt.To_Strings is
generic
type Ntype is range <>;
--Max_Len : Natural;
procedure Gen_To_String (Str : out String; First : out Natural; N : Ntype);
procedure Gen_To_String (Str : out String; First : out Natural; N : Ntype)
is
subtype R_Type is String (1 .. Str'Length);
S : R_Type renames Str;
P : Natural := S'Last;
V : Ntype;
begin
if N > 0 then
V := -N;
else
V := N;
end if;
loop
S (P) := Character'Val (48 - (V rem 10));
V := V / 10;
exit when V = 0;
P := P - 1;
end loop;
if N < 0 then
P := P - 1;
S (P) := '-';
end if;
First := P;
end Gen_To_String;
procedure To_String_I32 is new Gen_To_String (Ntype => Ghdl_I32);
procedure To_String (Str : out String; First : out Natural; N : Ghdl_I32)
renames To_String_I32;
procedure To_String_I64 is new Gen_To_String (Ntype => Ghdl_I64);
procedure To_String (Str : out String; First : out Natural; N : Ghdl_I64)
renames To_String_I64;
procedure To_String (Str : out String; Last : out Natural; N : Ghdl_F64) is
begin
Grt.Fcvt.Format_Image (Str, Last, Interfaces.IEEE_Float_64 (N));
end To_String;
procedure To_String (Str : out String;
Last : out Natural;
N : Ghdl_F64;
Nbr_Digits : Ghdl_I32) is
begin
Grt.Fcvt.Format_Digits
(Str, Last, Interfaces.IEEE_Float_64 (N), Natural (Nbr_Digits));
end To_String;
procedure To_String (Str : out String_Real_Format;
Last : out Natural;
N : Ghdl_F64;
Format : Ghdl_C_String)
is
procedure Snprintf_Fmtf (Str : in out String;
Len : Natural;
Format : Ghdl_C_String;
V : Ghdl_F64);
pragma Import (C, Snprintf_Fmtf, "__ghdl_snprintf_fmtf");
begin
-- FIXME: check format ('%', f/g/e/a)
Snprintf_Fmtf (Str, Str'Length, Format, N);
Last := strlen (To_Ghdl_C_String (Str'Address));
end To_String;
procedure To_String (Str : out String_Time_Unit;
First : out Natural;
Value : Ghdl_I64;
Unit : Ghdl_I64)
is
V, U : Ghdl_I64;
D : Natural;
P : Natural := Str'Last;
Has_Digits : Boolean;
begin
-- Always work on negative values.
if Value > 0 then
V := -Value;
else
V := Value;
end if;
Has_Digits := False;
U := Unit;
loop
if U = 1 then
if Has_Digits then
Str (P) := '.';
P := P - 1;
else
Has_Digits := True;
end if;
end if;
D := Natural (-(V rem 10));
if D /= 0 or else Has_Digits then
Str (P) := Character'Val (48 + D);
P := P - 1;
Has_Digits := True;
end if;
U := U / 10;
V := V / 10;
exit when V = 0 and then U = 0;
end loop;
if not Has_Digits then
Str (P) := '0';
else
P := P + 1;
end if;
if Value < 0 then
P := P - 1;
Str (P) := '-';
end if;
First := P;
end To_String;
end Grt.To_Strings;
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