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199 | ------------------------------------------------------------------------------
-- --
-- GNOGA - The GNU Omnificent GUI for Ada --
-- --
-- G N O G A _ D O C . T O K E N --
-- --
-- B o d y --
-- --
-- --
-- Copyright (C) 2014 David Botton --
-- --
-- This library is free software; you can redistribute it and/or modify --
-- it under terms of the GNU General Public License as published by the --
-- Free Software Foundation; either version 3, or (at your option) any --
-- later version. This library 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. --
-- --
-- As a special exception under Section 7 of GPL version 3, you are --
-- granted additional permissions described in the GCC Runtime Library --
-- Exception, version 3.1, as published by the Free Software Foundation. --
-- --
-- You should have received a copy of the GNU General Public License and --
-- a copy of the GCC Runtime Library Exception along with this program; --
-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
-- <http://www.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. --
-- --
-- For more information please go to http://www.gnoga.com --
------------------------------------------------------------------------------
with Ada.Characters.Latin_1;
with Ada.Strings.Maps.Constants;
with Strings_Edit;
package body Gnoga_Doc.Token is
function Is_EOT_Character (C : Character) return Boolean is
use Ada.Characters;
begin
if C = Latin_1.Space or
C = Latin_1.HT or
C = '-' or
C = ':' or
C = ';' or
C = ',' or
C = Latin_1.CR or
C = Latin_1.LF
then
return True;
else
return False;
end if;
end Is_EOT_Character;
function Is_EOL (S : in String; P : Integer) return Boolean is
use Ada.Characters;
C : constant Character := S (P);
begin
if C = Latin_1.CR or C = Latin_1.LF then
return True;
else
return False;
end if;
end Is_EOL;
function Is_Prefix (Prefix, S : in String; P : Integer) return Boolean is
use Ada.Strings.Maps.Constants;
begin
return Strings_Edit.Is_Prefix (Prefix => Prefix,
Source => S,
Pointer => P,
Map => Lower_Case_Map);
end Is_Prefix;
procedure Get_To_Character (C : in Character;
S : in String;
P : in out Integer)
is
begin
while P <= S'Last loop
if S (P) = C then
exit;
else
P := P + 1;
end if;
end loop;
end Get_To_Character;
procedure Get_To_Semicolon (S : in String; P : in out Integer) is
Par_Count : Natural := 0;
begin
while P <= S'Last loop
if S (P) = '(' then
Par_Count := Par_Count + 1;
elsif S (P) = ')' then
Par_Count := Par_Count - 1;
end if;
P := P + 1;
if Par_Count = 0 then
exit when S (P) = ';';
end if;
end loop;
end Get_To_Semicolon;
procedure Get_To_EOS (S : in String; P : in out Integer) is
use Ada.Characters;
use Ada.Strings.Maps;
use Ada.Strings.Maps.Constants;
TabAndSpace : constant Ada.Strings.Maps.Character_Set :=
To_Set (Sequence => Latin_1.Space &
Latin_1.HT &
Latin_1.CR &
Latin_1.LF);
begin
Strings_Edit.Get (S, P, TabAndSpace);
end Get_To_EOS;
procedure Get_To_EOL (S : String; P : in out Integer) is
use Ada.Characters;
begin
while P <= S'Last and S (P) /= Latin_1.LF loop
P := P + 1;
end loop;
end Get_To_EOL;
procedure Get_To_EOT (S : String; P : in out Integer) is
use Ada.Characters;
-- (' ', HT, ':', ';', ',', CR, LF)
begin
while P <= S'Last and not Is_EOT_Character (S (P)) loop
P := P + 1;
end loop;
end Get_To_EOT;
procedure Get_To_EOR (S : in String; P : in out Integer) is
begin
while P <= S'Last loop
if Is_Token ("end", S, P) then
exit;
end if;
P := P + 1;
end loop;
end Get_To_EOR;
procedure Get_To_Next_Token (S : in String; P : in out Integer) is
begin
Get_To_EOT (S, P);
Get_To_EOS (S, P);
end Get_To_Next_Token;
function Token_Name (S : String; P : Integer) return String is
T : Integer := P;
begin
Get_To_EOT (S, T);
return S (P .. T - 1);
end Token_Name;
function Is_Token (Token, S : String; P : Integer) return Boolean is
use Ada.Characters;
use Ada.Strings.Maps.Constants;
L : Integer;
begin
if not Strings_Edit.Is_Prefix (Prefix => Token,
Source => S,
Pointer => P,
Map => Lower_Case_Map)
then
return False;
end if;
L := P + Token'Length;
if not Is_EOT_Character (S (L)) then
return False;
else
if S'First = P then
return True;
else
L := P - 1;
return Is_EOT_Character (S (L));
end if;
end if;
end Is_Token;
end Gnoga_Doc.Token;
|