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//
// Copyright (c) 2012 Artyom Beilis (Tonkikh)
//
// Distributed under the Boost Software License, Version 1.0. (See
// accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt)
//
#ifndef BOOST_NOWIDE_ARGS_HPP_INCLUDED
#define BOOST_NOWIDE_ARGS_HPP_INCLUDED
#include <boost/config.hpp>
#include <boost/nowide/stackstring.hpp>
#include <vector>
#ifdef BOOST_WINDOWS
#include <boost/nowide/windows.hpp>
#endif
namespace boost {
namespace nowide {
#if !defined(BOOST_WINDOWS) && !defined(BOOST_NOWIDE_DOXYGEN)
class args {
public:
args(int &,char **&) {}
args(int &,char **&,char **&){}
~args() {}
};
#else
///
/// \brief args is a class that fixes standard main() function arguments and changes them to UTF-8 under
/// Microsoft Windows.
///
/// The class uses \c GetCommandLineW(), \c CommandLineToArgvW() and \c GetEnvironmentStringsW()
/// in order to obtain the information. It does not relates to actual values of argc,argv and env
/// under Windows.
///
/// It restores the original values in its destructor
///
/// \note the class owns the memory of the newly allocated strings
///
class args {
public:
///
/// Fix command line agruments
///
args(int &argc,char **&argv) :
old_argc_(argc),
old_argv_(argv),
old_env_(0),
old_argc_ptr_(&argc),
old_argv_ptr_(&argv),
old_env_ptr_(0)
{
fix_args(argc,argv);
}
///
/// Fix command line agruments and environment
///
args(int &argc,char **&argv,char **&en) :
old_argc_(argc),
old_argv_(argv),
old_env_(en),
old_argc_ptr_(&argc),
old_argv_ptr_(&argv),
old_env_ptr_(&en)
{
fix_args(argc,argv);
fix_env(en);
}
///
/// Restore original argc,argv,env values, if changed
///
~args()
{
if(old_argc_ptr_)
*old_argc_ptr_ = old_argc_;
if(old_argv_ptr_)
*old_argv_ptr_ = old_argv_;
if(old_env_ptr_)
*old_env_ptr_ = old_env_;
}
private:
void fix_args(int &argc,char **&argv)
{
int wargc;
wchar_t **wargv = CommandLineToArgvW(GetCommandLineW(),&wargc);
if(!wargv) {
argc = 0;
static char *dummy = 0;
argv = &dummy;
return;
}
try{
args_.resize(wargc+1,0);
arg_values_.resize(wargc);
for(int i=0;i<wargc;i++) {
if(!arg_values_[i].convert(wargv[i])) {
wargc = i;
break;
}
args_[i] = arg_values_[i].c_str();
}
argc = wargc;
argv = &args_[0];
}
catch(...) {
LocalFree(wargv);
throw;
}
LocalFree(wargv);
}
void fix_env(char **&en)
{
static char *dummy = 0;
en = &dummy;
wchar_t *wstrings = GetEnvironmentStringsW();
if(!wstrings)
return;
try {
wchar_t *wstrings_end = 0;
int count = 0;
for(wstrings_end = wstrings;*wstrings_end;wstrings_end+=wcslen(wstrings_end)+1)
count++;
if(env_.convert(wstrings,wstrings_end)) {
envp_.resize(count+1,0);
char *p=env_.c_str();
int pos = 0;
for(int i=0;i<count;i++) {
if(*p!='=')
envp_[pos++] = p;
p+=strlen(p)+1;
}
en = &envp_[0];
}
}
catch(...) {
FreeEnvironmentStringsW(wstrings);
throw;
}
FreeEnvironmentStringsW(wstrings);
}
std::vector<char *> args_;
std::vector<short_stackstring> arg_values_;
stackstring env_;
std::vector<char *> envp_;
int old_argc_;
char **old_argv_;
char **old_env_;
int *old_argc_ptr_;
char ***old_argv_ptr_;
char ***old_env_ptr_;
};
#endif
} // nowide
} // namespace boost
#endif
///
// vim: tabstop=4 expandtab shiftwidth=4 softtabstop=4
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