ceph/src/boost/boost/nowide/cstdlib.hpp

   1 //
   2 //  Copyright (c) 2012 Artyom Beilis (Tonkikh)
   3 //
   4 //  Distributed under the Boost Software License, Version 1.0. (See
   5 //  accompanying file LICENSE or copy at
   6 //  http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8 #ifndef BOOST_NOWIDE_CSTDLIB_HPP_INCLUDED
   9 #define BOOST_NOWIDE_CSTDLIB_HPP_INCLUDED
  10
  11 #include <boost/nowide/config.hpp>
  12 #if !defined(BOOST_WINDOWS)
  13 #include <cstdlib>
  14 #endif
  15
  16 namespace boost {
  17 namespace nowide {
  18 #if !defined(BOOST_WINDOWS) && !defined(BOOST_NOWIDE_DOXYGEN)
  19     using std::getenv;
  20     using std::system;
  21 #else
  22     ///
  23     /// \brief UTF-8 aware getenv. Returns 0 if the variable is not set.
  24     ///
  25     /// This function is not thread safe or reenterable as defined by the standard library
  26     ///
  27     BOOST_NOWIDE_DECL char* getenv(const char* key);
  28
  29     ///
  30     /// Same as std::system but cmd is UTF-8.
  31     ///
  32     BOOST_NOWIDE_DECL int system(const char* cmd);
  33
  34 #endif
  35     ///
  36     /// \brief Set environment variable \a key to \a value
  37     ///
  38     /// if overwrite is not 0, that the old value is always overwritten, otherwise,
  39     /// if the variable exists it remains unchanged
  40     ///
  41     /// \a key and \a value are UTF-8 on Windows
  42     /// \return zero on success, else nonzero
  43     ///
  44     BOOST_NOWIDE_DECL int setenv(const char* key, const char* value, int overwrite);
  45
  46     ///
  47     /// \brief Remove environment variable \a key
  48     ///
  49     /// \a key is UTF-8 on Windows
  50     /// \return zero on success, else nonzero
  51     ///
  52     BOOST_NOWIDE_DECL int unsetenv(const char* key);
  53
  54     ///
  55     /// \brief Adds or changes an environment variable, \a string must be in format KEY=VALUE
  56     ///
  57     /// \a string MAY become part of the environment, hence changes to the value MAY change
  58     /// the environment. For portability it is hence recommended NOT to change it.
  59     /// \a string is UTF-8 on Windows
  60     /// \return zero on success, else nonzero
  61     ///
  62     BOOST_NOWIDE_DECL int putenv(char* string);
  63
  64 } // namespace nowide
  65 } // namespace boost
  66
  67 #endif