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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)
#include <boost/config.hpp>
#ifndef BOOST_PROGRAM_OPTIONS_SOURCE
# define BOOST_PROGRAM_OPTIONS_SOURCE
#endif
#include <boost/program_options/config.hpp>
#include <boost/program_options/parsers.hpp>
#include <boost/program_options/options_description.hpp>
#include <boost/program_options/positional_options.hpp>
#include <boost/program_options/detail/cmdline.hpp>
#include <boost/program_options/detail/config_file.hpp>
#include <boost/program_options/environment_iterator.hpp>
#include <boost/program_options/detail/convert.hpp>
#include <boost/bind/bind.hpp>
#include <boost/throw_exception.hpp>
#include <cctype>
#include <fstream>
#if !defined(__GNUC__) || __GNUC__ < 3
#include <iostream>
#else
#include <istream>
#endif
#ifdef _WIN32
#include <stdlib.h>
#else
#include <unistd.h>
#endif
// The 'environ' should be declared in some cases. E.g. Linux man page says:
// (This variable must be declared in the user program, but is declared in
// the header file unistd.h in case the header files came from libc4 or libc5,
// and in case they came from glibc and _GNU_SOURCE was defined.)
// To be safe, declare it here.
// It appears that on Mac OS X the 'environ' variable is not
// available to dynamically linked libraries.
// See: http://article.gmane.org/gmane.comp.lib.boost.devel/103843
// See: http://lists.gnu.org/archive/html/bug-guile/2004-01/msg00013.html
#if defined(__APPLE__) && defined(__DYNAMIC__)
// The proper include for this is crt_externs.h, however it's not
// available on iOS. The right replacement is not known. See
// https://svn.boost.org/trac/boost/ticket/5053
extern "C" { extern char ***_NSGetEnviron(void); }
#define environ (*_NSGetEnviron())
#else
#if defined(__MWERKS__)
#include <crtl.h>
#else
#if !defined(_WIN32) || defined(__COMO_VERSION__)
extern char** environ;
#endif
#endif
#endif
using namespace std;
using namespace boost::placeholders;
namespace boost { namespace program_options {
#ifndef BOOST_NO_STD_WSTRING
namespace {
woption woption_from_option(const option& opt)
{
woption result;
result.string_key = opt.string_key;
result.position_key = opt.position_key;
result.unregistered = opt.unregistered;
std::transform(opt.value.begin(), opt.value.end(),
back_inserter(result.value),
boost::bind(from_utf8, _1));
std::transform(opt.original_tokens.begin(),
opt.original_tokens.end(),
back_inserter(result.original_tokens),
boost::bind(from_utf8, _1));
return result;
}
}
basic_parsed_options<wchar_t>
::basic_parsed_options(const parsed_options& po)
: description(po.description),
utf8_encoded_options(po),
m_options_prefix(po.m_options_prefix)
{
for (unsigned i = 0; i < po.options.size(); ++i)
options.push_back(woption_from_option(po.options[i]));
}
#endif
template<class charT>
basic_parsed_options<charT>
parse_config_file(std::basic_istream<charT>& is,
const options_description& desc,
bool allow_unregistered)
{
set<string> allowed_options;
const vector<shared_ptr<option_description> >& options = desc.options();
for (unsigned i = 0; i < options.size(); ++i)
{
const option_description& d = *options[i];
if (d.long_name().empty())
boost::throw_exception(
error("abbreviated option names are not permitted in options configuration files"));
allowed_options.insert(d.long_name());
}
// Parser return char strings
parsed_options result(&desc);
copy(detail::basic_config_file_iterator<charT>(
is, allowed_options, allow_unregistered),
detail::basic_config_file_iterator<charT>(),
back_inserter(result.options));
// Convert char strings into desired type.
return basic_parsed_options<charT>(result);
}
template
BOOST_PROGRAM_OPTIONS_DECL basic_parsed_options<char>
parse_config_file(std::basic_istream<char>& is,
const options_description& desc,
bool allow_unregistered);
#ifndef BOOST_NO_STD_WSTRING
template
BOOST_PROGRAM_OPTIONS_DECL basic_parsed_options<wchar_t>
parse_config_file(std::basic_istream<wchar_t>& is,
const options_description& desc,
bool allow_unregistered);
#endif
template<class charT>
basic_parsed_options<charT>
parse_config_file(const char* filename,
const options_description& desc,
bool allow_unregistered)
{
// Parser return char strings
std::basic_ifstream< charT > strm(filename);
if (!strm)
{
boost::throw_exception(reading_file(filename));
}
basic_parsed_options<charT> result
= parse_config_file(strm, desc, allow_unregistered);
if (strm.bad())
{
boost::throw_exception(reading_file(filename));
}
return result;
}
template
BOOST_PROGRAM_OPTIONS_DECL basic_parsed_options<char>
parse_config_file(const char* filename,
const options_description& desc,
bool allow_unregistered);
#ifndef BOOST_NO_STD_WSTRING
template
BOOST_PROGRAM_OPTIONS_DECL basic_parsed_options<wchar_t>
parse_config_file(const char* filename,
const options_description& desc,
bool allow_unregistered);
#endif
// This versio, which accepts any options without validation, is disabled,
// in the hope that nobody will need it and we cant drop it altogether.
// Besides, probably the right way to handle all options is the '*' name.
#if 0
BOOST_PROGRAM_OPTIONS_DECL parsed_options
parse_config_file(std::istream& is)
{
detail::config_file_iterator cf(is, false);
parsed_options result(0);
copy(cf, detail::config_file_iterator(),
back_inserter(result.options));
return result;
}
#endif
BOOST_PROGRAM_OPTIONS_DECL parsed_options
parse_environment(const options_description& desc,
const function1<std::string, std::string>& name_mapper)
{
parsed_options result(&desc);
for(environment_iterator i(environ), e; i != e; ++i) {
string option_name = name_mapper(i->first);
if (!option_name.empty()) {
option n;
n.string_key = option_name;
n.value.push_back(i->second);
result.options.push_back(n);
}
}
return result;
}
namespace detail {
class prefix_name_mapper {
public:
prefix_name_mapper(const std::string& prefix)
: prefix(prefix)
{}
std::string operator()(const std::string& s)
{
string result;
if (s.find(prefix) == 0) {
for(string::size_type n = prefix.size(); n < s.size(); ++n)
{
// Intel-Win-7.1 does not understand
// push_back on string.
result += static_cast<char>(tolower(s[n]));
}
}
return result;
}
private:
std::string prefix;
};
}
BOOST_PROGRAM_OPTIONS_DECL parsed_options
parse_environment(const options_description& desc,
const std::string& prefix)
{
return parse_environment(desc, detail::prefix_name_mapper(prefix));
}
BOOST_PROGRAM_OPTIONS_DECL parsed_options
parse_environment(const options_description& desc, const char* prefix)
{
return parse_environment(desc, string(prefix));
}
}}
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