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
|
------------------------------------------------------------------------------
-- --
-- GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS --
-- --
-- G N A T . B I N D _ E N V I R O N M E N T --
-- --
-- B o d y --
-- --
-- Copyright (C) 2015-2023, 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/>. --
-- --
-- GNARL was developed by the GNARL team at Florida State University. --
-- Extensive contributions were provided by AdaCore. --
-- --
------------------------------------------------------------------------------
with System;
package body GNAT.Bind_Environment is
---------
-- Get --
---------
function Get (Key : String) return String is
use type System.Address;
Bind_Env_Addr : constant System.Address;
pragma Import (C, Bind_Env_Addr, "__gl_bind_env_addr");
-- Variable provided by init.c/s-init.ads, and initialized by
-- the binder generated file.
Bind_Env : String (Positive);
for Bind_Env'Address use Bind_Env_Addr;
pragma Import (Ada, Bind_Env);
-- Import Bind_Env string from binder file. Note that we import
-- it here as a string with maximum boundaries. The "real" end
-- of the string is indicated by a NUL byte.
Index, KLen, VLen : Integer;
begin
if Bind_Env_Addr = System.Null_Address then
return "";
end if;
Index := Bind_Env'First;
loop
-- Index points to key length
VLen := 0;
KLen := Character'Pos (Bind_Env (Index));
exit when KLen = 0;
Index := Index + KLen + 1;
-- Index points to value length
VLen := Character'Pos (Bind_Env (Index));
exit when Bind_Env (Index - KLen .. Index - 1) = Key;
Index := Index + VLen + 1;
end loop;
return Bind_Env (Index + 1 .. Index + VLen);
end Get;
end GNAT.Bind_Environment;
|
