| ------------------------------------------------------------------------------ |
| -- -- |
| -- 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) 2015-2022, 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; |
