/usr/share/ada/adainclude/opentoken/opentoken-recognizer-string.ads is in libopentoken4-dev 5.0a-1.
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--
-- Copyright (C) 2009 Stephen Leake. All Rights Reserved.
-- Copyright (C) 1999 Ted Dennison
--
-- This file is part of the OpenToken package.
--
-- The OpenToken package 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 3, or (at your option)
-- any later version. The OpenToken package 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 distributed with the OpenToken
-- package; see file GPL.txt. 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 Ada.Strings.Maps;
with Ada.Characters.Latin_1;
-----------------------------------------------------------------------------
-- This package implements a token recognizer for a string literal.
-- It can optionally use an escape character to introduce special
-- character mappings, and can thus be used to recognize Ada, C or Java
-- strings.
-----------------------------------------------------------------------------
package OpenToken.Recognizer.String is
-- \n mapping is operating system dependent; we pick the Unix
-- convention here.
C_Style_Escape_Code_Map : constant Ada.Strings.Maps.Character_Mapping :=
Ada.Strings.Maps.To_Mapping
(From => "abfnrtv""'\",
To =>
Ada.Characters.Latin_1.BEL &
Ada.Characters.Latin_1.BS &
Ada.Characters.Latin_1.FF &
Ada.Characters.Latin_1.LF &
Ada.Characters.Latin_1.CR &
Ada.Characters.Latin_1.HT &
Ada.Characters.Latin_1.VT &
'"' & ''' & '\');
Java_Style_Escape_Code_Map : constant Ada.Strings.Maps.Character_Mapping :=
Ada.Strings.Maps.To_Mapping
(From => "bfnrt""'\",
To =>
Ada.Characters.Latin_1.BS &
Ada.Characters.Latin_1.FF &
Ada.Characters.Latin_1.LF &
Ada.Characters.Latin_1.CR &
Ada.Characters.Latin_1.HT &
'"' & ''' & '\');
type Instance is new OpenToken.Recognizer.Instance with private;
--------------------------------------------------------------------------
-- This procedure will be called to create a String literal token.
-- If Escapeable is set to False, the string will treat the Escape
-- character as any other character.
--
-- If all parameters are defaulted, an Ada-style string token will
-- be created.
--
-- If Escapeable is set to True, Double_Delimiter set to false,
-- and all other parameters are defaulted, a C-style string token
-- will be created.
--
-- If Escapeable is set to True, Double_Delimiter set to false,
-- Escape_Mapping to Java_Style_Escape_Code_Map, the remaining
-- parameters are defaulted, a Java-style string token will be
-- created.
--------------------------------------------------------------------------
function Get
(Delimiter : in Character := '"';
Double_Delimiter : in Boolean := True;
Escapeable : in Boolean := False;
Escape : in Character := '\';
Escape_Mapping : in Ada.Strings.Maps.Character_Mapping := C_Style_Escape_Code_Map)
return Instance;
--------------------------------------------------------------------------
-- Return the translated value of the recognized string. This will
-- not include any quotation characters. The escape mapping will
-- have been applied, and internal sets of double quotes will
-- appear as a single double-quote character.
--------------------------------------------------------------------------
function Value (Recognized_String : in Instance) return Standard.String;
private
type State_ID is
(Delimit, Text, Escaped_Text, Escaped_Octal_Number, First_Hex_Digit, Escaped_Hex_Number, Double_Delimit, Done);
type Instance is new OpenToken.Recognizer.Instance with record
-- The finite state machine state
State : State_ID := Delimit;
Esc_Code : Natural;
-- The token settings
Delimiter : Character;
Double_Delimiter : Boolean;
Escapeable : Boolean;
Escape : Character;
Escape_Mapping : Ada.Strings.Maps.Character_Mapping;
-- The translated string value
Value : Standard.String (1 .. Max_String_Length);
Value_Length : Natural := 0;
Good_Length : Natural := 0;
end record;
overriding procedure Clear (The_Token : in out Instance);
overriding procedure Analyze
(The_Token : in out Instance;
Next_Char : in Character;
Verdict : out Analysis_Verdict);
end OpenToken.Recognizer.String;
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