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-- GHDL Run Time (GRT) - Misc subprograms for characters and strings
-- Copyright (C) 2016 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.
package body Grt.Strings is
function Is_Whitespace (C : in Character) return Boolean is
use ASCII;
begin
return C = ' ' or C = NBSP or C = HT;
end Is_Whitespace;
function First_Non_Whitespace_Pos (Str : String) return Integer is
begin
for I in Str'Range loop
if not Is_Whitespace (Str (I)) then
return I;
end if;
end loop;
return -1;
end First_Non_Whitespace_Pos;
function Last_Non_Whitespace_Pos (Str : String) return Integer is
begin
for Index in reverse Str'Range loop
if not Is_Whitespace (Str (Index)) then
return Index;
end if;
end loop;
return -1;
end Last_Non_Whitespace_Pos;
function New_Line_Pos (Line : String) return Integer is
begin
return Find (Line, ASCII.LF);
end New_Line_Pos;
function Find (Str : String; Char : Character) return Integer is
begin
for Index in Str'Range loop
if Str (Index) = Char then
return Index;
end if;
end loop;
return -1;
end Find;
function Find (Str : String; Char : Character; Start : Positive)
return Integer is
begin
return Find (Str (Start .. Str'Last), Char);
end Find;
function To_Lower (C : Character) return Character is
begin
if C in 'A' .. 'Z' then
return Character'Val (Character'Pos (C) + 32);
else
return C;
end if;
end To_Lower;
function Value (Str : String) return Integer
is
Decimal : Positive;
Value_Tmp : Natural;
Digit : Integer;
begin
Decimal := 1;
Value_Tmp := 0;
for Index in reverse Str'Range loop
Digit := Value (Str (Index));
if Digit = -1 then
return -1;
end if;
Value_Tmp := Value_Tmp + Digit * Decimal;
Decimal := Decimal * 10;
end loop;
return Value_Tmp;
end Value;
function Value (Char : Character) return Integer is
begin
case Char is
when '0' .. '9' =>
return Character'Pos (Char) - Character'Pos ('0');
when others =>
return -1;
end case;
end Value;
end Grt.Strings;
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