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
|
------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME COMPONENTS --
-- --
-- A D A . S T R I N G S . U N B O U N D E D . T E X T _ I O --
-- --
-- B o d y --
-- --
-- Copyright (C) 1997-2009, 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 3, 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. --
-- --
-- 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/>. --
-- --
-- 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; use Ada.Text_IO;
package body Ada.Strings.Unbounded.Text_IO is
--------------
-- Get_Line --
--------------
function Get_Line return Unbounded_String is
Buffer : String (1 .. 1000);
Last : Natural;
Str1 : String_Access;
Str2 : String_Access;
Result : Unbounded_String;
begin
Get_Line (Buffer, Last);
Str1 := new String'(Buffer (1 .. Last));
while Last = Buffer'Last loop
Get_Line (Buffer, Last);
Str2 := new String (1 .. Str1'Last + Last);
Str2 (Str1'Range) := Str1.all;
Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last);
Free (Str1);
Str1 := Str2;
end loop;
Result.Reference := Str1;
Result.Last := Str1'Length;
return Result;
end Get_Line;
function Get_Line (File : Ada.Text_IO.File_Type) return Unbounded_String is
Buffer : String (1 .. 1000);
Last : Natural;
Str1 : String_Access;
Str2 : String_Access;
Result : Unbounded_String;
begin
Get_Line (File, Buffer, Last);
Str1 := new String'(Buffer (1 .. Last));
while Last = Buffer'Last loop
Get_Line (File, Buffer, Last);
Str2 := new String (1 .. Str1'Last + Last);
Str2 (Str1'Range) := Str1.all;
Str2 (Str1'Last + 1 .. Str2'Last) := Buffer (1 .. Last);
Free (Str1);
Str1 := Str2;
end loop;
Result.Reference := Str1;
Result.Last := Str1'Length;
return Result;
end Get_Line;
procedure Get_Line (Item : out Unbounded_String) is
begin
Get_Line (Current_Input, Item);
end Get_Line;
procedure Get_Line
(File : Ada.Text_IO.File_Type;
Item : out Unbounded_String)
is
begin
-- We are going to read into the string that is already there and
-- allocated. Hopefully it is big enough now, if not, we will extend
-- it in the usual manner using Realloc_For_Chunk.
-- Make sure we start with at least 80 characters
if Item.Reference'Last < 80 then
Realloc_For_Chunk (Item, 80);
end if;
-- Loop to read data, filling current string as far as possible.
-- Item.Last holds the number of characters read so far.
Item.Last := 0;
loop
Get_Line
(File,
Item.Reference (Item.Last + 1 .. Item.Reference'Last),
Item.Last);
-- If we hit the end of the line before the end of the buffer, then
-- we are all done, and the result length is properly set.
if Item.Last < Item.Reference'Last then
return;
end if;
-- If not enough room, double it and keep reading
Realloc_For_Chunk (Item, Item.Last);
end loop;
end Get_Line;
---------
-- Put --
---------
procedure Put (U : Unbounded_String) is
begin
Put (U.Reference (1 .. U.Last));
end Put;
procedure Put (File : File_Type; U : Unbounded_String) is
begin
Put (File, U.Reference (1 .. U.Last));
end Put;
--------------
-- Put_Line --
--------------
procedure Put_Line (U : Unbounded_String) is
begin
Put_Line (U.Reference (1 .. U.Last));
end Put_Line;
procedure Put_Line (File : File_Type; U : Unbounded_String) is
begin
Put_Line (File, U.Reference (1 .. U.Last));
end Put_Line;
end Ada.Strings.Unbounded.Text_IO;
|
