#ifndef BOOST_PROGRAM_OPTIONS_SOURCE

# define BOOST_PROGRAM_OPTIONS_SOURCE

#endif

#include <boost/program_options/parsers.hpp>

#include <cctype>

using std::size_t;

#ifdef _WIN32

namespace boost { namespace program_options {

// Take a command line string and splits in into tokens, according

// to the rules windows command line processor uses.

//

// The rules are pretty funny, see

// http://article.gmane.org/gmane.comp.lib.boost.user/3005

// http://msdn.microsoft.com/library/en-us/vccelng/htm/progs_12.asp

BOOST_PROGRAM_OPTIONS_DECL

std::vector<std::string> split_winmain(const std::string& input)

{

std::vector<std::string> result;

std::string::const_iterator i = input.begin(), e = input.end();

for(;i != e; ++i)

if (!isspace((unsigned char)*i))

break;

if (i != e) {

std::string current;

bool inside_quoted = false;

bool empty_quote = false;

int backslash_count = 0;

for(; i != e; ++i) {

if (*i == '"') {

// '"' preceded by even number (n) of backslashes generates

// n/2 backslashes and is a quoted block delimiter

if (backslash_count % 2 == 0) {

current.append(backslash_count / 2, '\\');

empty_quote = inside_quoted && current.empty();

inside_quoted = !inside_quoted;

// '"' preceded by odd number (n) of backslashes generates

// (n-1)/2 backslashes and is literal quote.

} else {

current.append(backslash_count / 2, '\\');

current += '"';

}

backslash_count = 0;

} else if (*i == '\\') {

++backslash_count;

} else {

// Not quote or backslash. All accumulated backslashes should be

// added

if (backslash_count) {

current.append(backslash_count, '\\');

backslash_count = 0;

}

if (isspace((unsigned char)*i) && !inside_quoted) {

// Space outside quoted section terminate the current argument

result.push_back(current);

current.resize(0);

empty_quote = false;

for(;i != e && isspace((unsigned char)*i); ++i)

;

--i;

} else {

current += *i;

}

}

}

// If we have trailing backslashes, add them

if (backslash_count)

current.append(backslash_count, '\\');

// If we have non-empty 'current' or we're still in quoted

// section (even if 'current' is empty), add the last token.

if (!current.empty() || inside_quoted || empty_quote)

result.push_back(current);

}

return result;

}

#ifndef BOOST_NO_STD_WSTRING

BOOST_PROGRAM_OPTIONS_DECL std::vector<std::wstring>

split_winmain(const std::wstring& cmdline)

{

std::vector<std::wstring> result;

std::vector<std::string> aux = split_winmain(to_internal(cmdline));

for (size_t i = 0, e = aux.size(); i < e; ++i)

result.push_back(from_utf8(aux[i]));

return result;

}

#endif

}}

#endif