src/shared/envvars.pas

   1 (* Copyright (C)  Doom 2D: Forever Developers
   2  *
   3  * This program is free software: you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License as published by
   5  * the Free Software Foundation, either version 3 of the License, or
   6  * (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License
  14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  15  *)
  16 {$INCLUDE a_modes.inc}
  17 {.$MODE OBJFPC}
  18 unit envvars;
  19
  20 interface
  21
  22 uses SysUtils, CTypes;
  23
  24 function SetEnvVar(const VarName: AnsiString; const VarVal: AnsiString): Boolean;
  25
  26 implementation
  27
  28 {$IFDEF WINDOWS}
  29 uses Windows;
  30 function setenv(const VarStr: PChar; const VarVal: PChar; Repl: cint): cint;
  31 begin
  32   if (SetEnvironmentVariable(VarStr, VarVal)) then
  33     Result := 0
  34   else
  35     Result := -1;
  36 end;
  37 {$ELSE}
  38 {$LINKLIB c}
  39 const clib = 'c';
  40 function setenv(const VarStr: PChar; const VarVal: PChar; Repl: cint): cint;
  41 cdecl; external clib name 'setenv';
  42 {$ENDIF}
  43
  44 function SetEnvVar(const VarName: AnsiString; const VarVal: AnsiString): Boolean;
  45 begin
  46   Result := (setenv(PChar(VarName), PChar(VarVal), 1) = 0);
  47 end;
  48
  49 end.