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// Copyright Vladimir Prus 2002-2004.
// 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_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
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