/usr/share/ada/adainclude/opentoken/opentoken-recognizer-integer.adb is in libopentoken5-dev 6.0b-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 | -------------------------------------------------------------------------------
--
-- Copyright (C) 2002, 2003, 2014 Stephen Leake
-- Copyright (C) 1999, 2000 FlightSafety International and 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.
--
-- This software was originally developed by the following company, and was
-- released as open-source software as a service to the community:
--
-- FlightSafety International Simulation Systems Division
-- Broken Arrow, OK USA 918-259-4000
--
-------------------------------------------------------------------------------
-------------------------------------------------------------------------------
-- This package implements a token recognizer for a token of an integer.
-------------------------------------------------------------------------------
package body OpenToken.Recognizer.Integer is
overriding procedure Clear (The_Token : in out Instance)
is begin
Extended_Digits.Clear (The_Token.Decimal_Recognizer);
The_Token.Last_Verdict := Failed;
The_Token.State := First_Char;
end Clear;
overriding procedure Analyze
(The_Token : in out Instance;
Next_Char : in Character;
Verdict : out Analysis_Verdict)
is
Decimal_Verdict : Analysis_Verdict := Failed;
begin
case The_Token.State is
when First_Char =>
case Next_Char is
when '-' | '+' =>
if The_Token.Allow_Signs then
The_Token.State := First_Numeral;
Verdict := So_Far_So_Good;
else
The_Token.State := Done;
Verdict := Failed;
end if;
when others =>
Extended_Digits.Analyze
(The_Token => The_Token.Decimal_Recognizer,
Next_Char => Next_Char,
Verdict => Decimal_Verdict);
if Decimal_Verdict = Matches then
The_Token.Check_Zero := Next_Char = '0' and not The_Token.Allow_Leading_Zero;
Verdict := Matches;
The_Token.State := Numeral;
else
Verdict := Failed;
The_Token.State := Done;
end if;
end case;
when First_Numeral =>
Extended_Digits.Analyze
(The_Token => The_Token.Decimal_Recognizer,
Next_Char => Next_Char,
Verdict => Decimal_Verdict);
if Decimal_Verdict = Matches then
The_Token.Check_Zero := Next_Char = '0' and not The_Token.Allow_Leading_Zero;
Verdict := Matches;
The_Token.State := Numeral;
else
Verdict := Failed;
The_Token.State := Done;
end if;
when Numeral =>
-- If the numeral is a decimal integer, it matches.
Extended_Digits.Analyze (The_Token.Decimal_Recognizer, Next_Char, Decimal_Verdict);
case Decimal_Verdict is
when So_Far_So_Good | -- Next_Char is '_'
Matches => -- or decimal digit
if The_Token.Check_Zero then -- The string in question is not "0".
Verdict := Failed;
The_Token.State := Done;
else
Verdict := Decimal_Verdict;
end if;
when Failed =>
if The_Token.Last_Verdict = Matches and
(Next_Char = 'e' or Next_Char = 'E') and
The_Token.Allow_Exponent
then
Verdict := So_Far_So_Good;
The_Token.State := Exponent_Sign;
else
Verdict := Failed;
The_Token.State := Done;
end if;
end case;
when Exponent_Sign =>
-- If it is a digit, it matches.
-- If it is a sign , so-far-so-good...
Extended_Digits.Clear (The_Token.Decimal_Recognizer);
if Next_Char = '+' then
Verdict := So_Far_So_Good;
The_Token.State := Exponent;
else
Extended_Digits.Analyze (The_Token.Decimal_Recognizer, Next_Char, Decimal_Verdict);
if Decimal_Verdict = Matches then -- a decimal digit
Verdict := Matches;
The_Token.State := Exponent;
else
Verdict := Failed;
The_Token.State := Done;
end if;
end if;
when Exponent =>
-- If the exponent is a decimal integer, it matches.
Extended_Digits.Analyze (The_Token.Decimal_Recognizer, Next_Char, Decimal_Verdict);
case Decimal_Verdict is
when So_Far_So_Good | -- Next_Char is '_'
Matches => -- or decimal digit
Verdict := Decimal_Verdict;
when Failed =>
Verdict := Failed;
The_Token.State := Done;
end case;
when Done =>
-- We shouldn't get called from here.
Verdict := Failed;
end case;
The_Token.Last_Verdict := Decimal_Verdict;
end Analyze;
----------------------------------------------------------------------------
-- This procedure will be called to create an integer token
----------------------------------------------------------------------------
function Get (Allow_Underscores : Boolean := True;
Allow_Exponent : Boolean := True;
Allow_Leading_Zero : Boolean := True;
Allow_Signs : Boolean := True) return Instance is
begin
return (Report => True,
Allow_Exponent => Allow_Exponent,
Allow_Leading_Zero => Allow_Leading_Zero,
Allow_Signs => Allow_Signs,
Decimal_Recognizer => Extended_Digits.Get (Allow_Underscores => Allow_Underscores,
For_Base => 10),
Last_Verdict => Failed,
Check_Zero => True,
State => First_Char);
end Get;
end OpenToken.Recognizer.Integer;
|