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
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
|
------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . T E X T _ I O . E N U M E R A T I O N _ A U X --
-- --
-- B o d y --
-- --
-- Copyright (C) 1992-2006, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
-- ware Foundation; either version 2, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT 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 GNAT; see file COPYING. If not, write --
-- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
-- Boston, MA 02110-1301, 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. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
with Ada.Text_IO.Generic_Aux; use Ada.Text_IO.Generic_Aux;
with Ada.Characters.Handling; use Ada.Characters.Handling;
-- Note: this package does not yet deal properly with wide characters ???
package body Ada.Text_IO.Enumeration_Aux is
------------------
-- Get_Enum_Lit --
------------------
procedure Get_Enum_Lit
(File : File_Type;
Buf : out String;
Buflen : out Natural)
is
ch : Integer;
C : Character;
begin
Buflen := 0;
Load_Skip (File);
ch := Getc (File);
C := Character'Val (ch);
-- Character literal case. If the initial character is a quote, then
-- we read as far as we can without backup (see ACVC test CE3905L)
if C = ''' then
Store_Char (File, ch, Buf, Buflen);
ch := Getc (File);
if ch in 16#20# .. 16#7E# or else ch >= 16#80# then
Store_Char (File, ch, Buf, Buflen);
ch := Getc (File);
if ch = Character'Pos (''') then
Store_Char (File, ch, Buf, Buflen);
else
Ungetc (ch, File);
end if;
else
Ungetc (ch, File);
end if;
-- Similarly for identifiers, read as far as we can, in particular,
-- do read a trailing underscore (again see ACVC test CE3905L to
-- understand why we do this, although it seems somewhat peculiar).
else
-- Identifier must start with a letter
if not Is_Letter (C) then
Ungetc (ch, File);
return;
end if;
-- If we do have a letter, loop through the characters quitting on
-- the first non-identifier character (note that this includes the
-- cases of hitting a line mark or page mark).
loop
C := Character'Val (ch);
Store_Char (File, Character'Pos (To_Upper (C)), Buf, Buflen);
ch := Getc (File);
exit when ch = EOF_Char;
C := Character'Val (ch);
exit when not Is_Letter (C)
and then not Is_Digit (C)
and then C /= '_';
exit when C = '_'
and then Buf (Buflen) = '_';
end loop;
Ungetc (ch, File);
end if;
end Get_Enum_Lit;
---------
-- Put --
---------
procedure Put
(File : File_Type;
Item : String;
Width : Field;
Set : Type_Set)
is
Actual_Width : constant Count := Count'Max (Count (Width), Item'Length);
begin
if Set = Lower_Case and then Item (Item'First) /= ''' then
declare
Iteml : String (Item'First .. Item'Last);
begin
for J in Item'Range loop
Iteml (J) := To_Lower (Item (J));
end loop;
Put_Item (File, Iteml);
end;
else
Put_Item (File, Item);
end if;
for J in 1 .. Actual_Width - Item'Length loop
Put (File, ' ');
end loop;
end Put;
----------
-- Puts --
----------
procedure Puts
(To : out String;
Item : String;
Set : Type_Set)
is
Ptr : Natural;
begin
if Item'Length > To'Length then
raise Layout_Error;
else
Ptr := To'First;
for J in Item'Range loop
if Set = Lower_Case and then Item (Item'First) /= ''' then
To (Ptr) := To_Lower (Item (J));
else
To (Ptr) := Item (J);
end if;
Ptr := Ptr + 1;
end loop;
while Ptr <= To'Last loop
To (Ptr) := ' ';
Ptr := Ptr + 1;
end loop;
end if;
end Puts;
-------------------
-- Scan_Enum_Lit --
-------------------
procedure Scan_Enum_Lit
(From : String;
Start : out Natural;
Stop : out Natural)
is
C : Character;
-- Processing for Scan_Enum_Lit
begin
String_Skip (From, Start);
-- Character literal case. If the initial character is a quote, then
-- we read as far as we can without backup (see ACVC test CE3905L
-- which is for the analogous case for reading from a file).
if From (Start) = ''' then
Stop := Start;
if Stop = From'Last then
raise Data_Error;
else
Stop := Stop + 1;
end if;
if From (Stop) in ' ' .. '~'
or else From (Stop) >= Character'Val (16#80#)
then
if Stop = From'Last then
raise Data_Error;
else
Stop := Stop + 1;
if From (Stop) = ''' then
return;
end if;
end if;
end if;
raise Data_Error;
-- Similarly for identifiers, read as far as we can, in particular,
-- do read a trailing underscore (again see ACVC test CE3905L to
-- understand why we do this, although it seems somewhat peculiar).
else
-- Identifier must start with a letter
if not Is_Letter (From (Start)) then
raise Data_Error;
end if;
-- If we do have a letter, loop through the characters quitting on
-- the first non-identifier character (note that this includes the
-- cases of hitting a line mark or page mark).
Stop := Start;
while Stop < From'Last loop
C := From (Stop + 1);
exit when not Is_Letter (C)
and then not Is_Digit (C)
and then C /= '_';
exit when C = '_'
and then From (Stop) = '_';
Stop := Stop + 1;
end loop;
end if;
end Scan_Enum_Lit;
end Ada.Text_IO.Enumeration_Aux;
|
