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-- GHDL Run Time (GRT) - variable strings.
-- Copyright (C) 2002 - 2014 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.
--
-- 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 System.Storage_Elements; -- Work around GNAT bug.
pragma Unreferenced (System.Storage_Elements);
with Grt.Errors; use Grt.Errors;
with Grt.C; use Grt.C;
package body Grt.Vstrings is
procedure Free (Fs : Fat_String_Acc);
pragma Import (C, Free);
function Malloc (Len : Natural) return Fat_String_Acc;
pragma Import (C, Malloc);
function Realloc (Ptr : Fat_String_Acc; Len : Natural)
return Fat_String_Acc;
pragma Import (C, Realloc);
procedure Free (Vstr : in out Vstring) is
begin
Free (Vstr.Str);
Vstr := (Str => null,
Max => 0,
Len => 0);
end Free;
procedure Grow (Vstr : in out Vstring; Sum : Natural)
is
Nlen : constant Natural := Vstr.Len + Sum;
Nmax : Natural;
begin
Vstr.Len := Nlen;
if Nlen <= Vstr.Max then
return;
end if;
if Vstr.Max = 0 then
Nmax := 32;
else
Nmax := Vstr.Max;
end if;
while Nmax < Nlen loop
Nmax := Nmax * 2;
end loop;
Vstr.Str := Realloc (Vstr.Str, Nmax);
if Vstr.Str = null then
Internal_Error ("grt.vstrings.grow: memory exhausted");
end if;
Vstr.Max := Nmax;
end Grow;
procedure Append (Vstr : in out Vstring; C : Character)
is
begin
Grow (Vstr, 1);
Vstr.Str (Vstr.Len) := C;
end Append;
procedure Append (Vstr : in out Vstring; Str : String)
is
S : constant Natural := Vstr.Len;
begin
Grow (Vstr, Str'Length);
Vstr.Str (S + 1 .. S + Str'Length) := Str;
end Append;
procedure Append (Vstr : in out Vstring; Str : Ghdl_C_String)
is
S : constant Natural := Vstr.Len;
L : constant Natural := strlen (Str);
begin
Grow (Vstr, L);
Vstr.Str (S + 1 .. S + L) := Str (1 .. L);
end Append;
function Length (Vstr : Vstring) return Natural is
begin
return Vstr.Len;
end Length;
procedure Truncate (Vstr : in out Vstring; Len : Natural) is
begin
if Len > Vstr.Len then
Internal_Error ("grt.vstrings.truncate: bad len");
end if;
Vstr.Len := Len;
end Truncate;
procedure Put (Stream : FILEs; Vstr : Vstring)
is
S : size_t;
begin
S := size_t (Vstr.Len);
if S > 0 then
S := fwrite (Vstr.Str (1)'Address, S, 1, Stream);
end if;
end Put;
procedure Free (Rstr : in out Rstring) is
begin
Free (Rstr.Str);
Rstr := (Str => null,
Max => 0,
First => 0);
end Free;
function Length (Rstr : Rstring) return Natural is
begin
return Rstr.Max + 1 - Rstr.First;
end Length;
procedure Grow (Rstr : in out Rstring; Min : Natural)
is
Len : constant Natural := Length (Rstr);
Nlen : constant Natural := Len + Min;
Nstr : Fat_String_Acc;
Nfirst : Natural;
Nmax : Natural;
begin
if Nlen <= Rstr.Max then
return;
end if;
if Rstr.Max = 0 then
Nmax := 32;
else
Nmax := Rstr.Max;
end if;
while Nmax < Nlen loop
Nmax := Nmax * 2;
end loop;
Nstr := Malloc (Nmax);
Nfirst := Nmax + 1 - Len;
if Rstr.Str /= null then
Nstr (Nfirst .. Nmax) := Rstr.Str (Rstr.First .. Rstr.Max);
Free (Rstr.Str);
end if;
Rstr := (Str => Nstr,
Max => Nmax,
First => Nfirst);
end Grow;
procedure Prepend (Rstr : in out Rstring; C : Character)
is
begin
Grow (Rstr, 1);
Rstr.First := Rstr.First - 1;
Rstr.Str (Rstr.First) := C;
end Prepend;
procedure Prepend (Rstr : in out Rstring; Str : String)
is
begin
Grow (Rstr, Str'Length);
Rstr.First := Rstr.First - Str'Length;
Rstr.Str (Rstr.First .. Rstr.First + Str'Length - 1) := Str;
end Prepend;
procedure Prepend (Rstr : in out Rstring; Str : Ghdl_C_String)
is
L : constant Natural := strlen (Str);
begin
Grow (Rstr, L);
Rstr.First := Rstr.First - L;
Rstr.Str (Rstr.First .. Rstr.First + L - 1) := Str (1 .. L);
end Prepend;
function Get_Address (Rstr : Rstring) return Address
is
begin
return Rstr.Str (Rstr.First)'Address;
end Get_Address;
procedure Copy (Rstr : Rstring; Str : in out String; Len : out Natural)
is
begin
Len := Length (Rstr);
if Len > Str'Length then
Str := Rstr.Str (Rstr.First .. Rstr.First + Str'Length - 1);
else
Str (Str'First .. Str'First + Len - 1) :=
Rstr.Str (Rstr.First .. Rstr.First + Len - 1);
end if;
end Copy;
procedure Put (Stream : FILEs; Rstr : Rstring)
is
S : size_t;
pragma Unreferenced (S);
begin
S := fwrite (Get_Address (Rstr), size_t (Length (Rstr)), 1, Stream);
end Put;
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;
end Grt.Vstrings;
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