lib/standard/environ.nit

   1 # This file is part of NIT ( http://www.nitlanguage.org ).
   2 #
   3 # Copyright 2006 Floréal Morandat <morandat@lirmm.fr>
   4 # Copyright 2008 Jean Privat <jean@pryen.org>
   5 #
   6 # This file is free software, which comes along with NIT.  This software is
   7 # distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
   8 # without  even  the implied warranty of  MERCHANTABILITY or  FITNESS FOR A
   9 # PARTICULAR PURPOSE.  You can modify it is you want,  provided this header
  10 # is kept unaltered, and a notification of the changes is added.
  11 # You  are  allowed  to  redistribute it and sell it, alone or is a part of
  12 # another product.
  13
  14 # Access to the environment variables of the process
  15 module environ
  16
  17 import string
  18
  19 # TODO prevoir une structure pour recup tout un environ, le modifier et le passer a process
  20
  21 redef class String
  22         # Return environment value for the symbol.
  23         # If there is no such environment variable, then return ""
  24         #
  25         #     assert "PATH".environ     != ""
  26         #     assert "NIT %\n".environ  == ""
  27         fun environ: String
  28         do
  29                 var res = self.to_cstring.get_environ
  30                 # FIXME: There is no proper way to handle NULL C string yet. What a pitty.
  31                 var nulstr = once ("".to_cstring.get_environ)
  32                 if res != nulstr then
  33                         return res.to_s
  34                 else
  35                         return ""
  36                 end
  37         end
  38
  39         # Set the enviroment value of a variable.
  40         #
  41         #     "NITis".setenv("fun")
  42         #     assert "NITis".environ  == "fun"
  43         fun setenv(v: String) do to_cstring.setenv( v.to_cstring )
  44 end
  45
  46 redef class NativeString
  47         private fun get_environ: NativeString is extern "string_NativeString_NativeString_get_environ_0"
  48         private fun setenv( v : NativeString ) is extern "string_NativeString_NativeString_setenv_1"
  49 end