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 | -- ----------------------------------------------------------------------------
--
-- Copyright (C) 2009 Stephe Leake
-- Copyright (C) 1999 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
-- ----------------------------------------------------------------------------
with Ada.Characters.Latin_1;
with Ada.Strings.Maps;
with Ada.Strings.Maps.Constants;
use type Ada.Strings.Maps.Character_Set;
-- --------------------------------------------------------------------------
-- This package implements a token recognizer for
-- comma-separated-value (CSV) fields of any type. Due to its general
-- nature, it should be declared later in the syntax than more
-- specific CSV field recognizers, so that it will work as a default
-- match. To facilitate that, it does not match any leading or
-- trailing whitespace.
-- --------------------------------------------------------------------------
package body OpenToken.Recognizer.CSV_Field is
-- Characters that can be inside the field, but not at the ends
Inner_Characters : constant Ada.Strings.Maps.Character_Set :=
Ada.Strings.Maps.To_Set (Ada.Characters.Latin_1.HT &
Ada.Characters.Latin_1.Space);
-- Characters that may appear anywhere in the field
Match_Characters : constant Ada.Strings.Maps.Character_Set :=
(Ada.Strings.Maps.Constants.Graphic_Set - Inner_Characters) -
Ada.Strings.Maps.To_Set (',');
overriding procedure Clear (The_Token : in out Instance)
is begin
The_Token.State := First_Char;
end Clear;
overriding procedure Analyze
(The_Token : in out Instance;
Next_Char : in Character;
Verdict : out Analysis_Verdict)
is begin
case The_Token.State is
when First_Char =>
if Ada.Strings.Maps.Is_In (Element => Next_Char, Set => Match_Characters) then
Verdict := Matches;
The_Token.State := Text;
else
Verdict := Failed;
The_Token.State := Done;
end if;
when Text =>
if Ada.Strings.Maps.Is_In (Element => Next_Char, Set => Match_Characters) then
Verdict := Matches;
elsif Ada.Strings.Maps.Is_In (Element => Next_Char, Set => Inner_Characters) then
Verdict := So_Far_So_Good;
else
Verdict := Failed;
The_Token.State := Done;
end if;
when Done =>
-- We shouldn't get called from here.
Verdict := Failed;
end case;
end Analyze;
function Get return Instance
is begin
return (Report => True, State => First_Char);
end Get;
end OpenToken.Recognizer.CSV_Field;
|