/**
* Converts an environment to a string used by CreateProcess().
*
* Converts the environment's contents to the format used by the
* CreateProcess() system call. The returned char* string is
* allocated in dynamic memory; the caller must free it when not
* used any more. This is enforced by the use of a shared pointer.
*
* \return A dynamically allocated char* string that represents
* the environment's content. This string is of the form
* var1=value1\\0var2=value2\\0\\0.
*/
inline boost::shared_array<char> environment_to_win32_strings(const environment &env)
{
boost::shared_array<char> envp;
if (env.empty())
{
envp.reset(new char[2]);
::ZeroMemory(envp.get(), 2);
}
else
{
std::string s;
for (environment::const_iterator it = env.begin(); it != env.end(); ++it)
{
s += it->first + "=" + it->second;
s.push_back(0);
}
envp.reset(new char[s.size() + 1]);
#if defined(__CYGWIN__) || defined(_SCL_SECURE_NO_DEPRECATE)
::memcpy(envp.get(), s.c_str(), s.size() + 1);
#else
::memcpy_s(envp.get(), s.size() + 1, s.c_str(), s.size() + 1);
#endif
}
return envp;
}
