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336 lines
9.0 KiB
C++
336 lines
9.0 KiB
C++
// Copyright Vladimir Prus 2004.
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// Distributed under the Boost Software License, Version 1.0.
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// (See accompanying file LICENSE_1_0.txt
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// or copy at http://www.boost.org/LICENSE_1_0.txt)
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#define BOOST_PROGRAM_OPTIONS_SOURCE
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#include <boost/program_options/config.hpp>
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#include <boost/program_options/value_semantic.hpp>
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#include <boost/program_options/detail/convert.hpp>
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#include <cctype>
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namespace boost { namespace program_options {
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using namespace std;
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void
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value_semantic_codecvt_helper<char>::
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parse(boost::any& value_store,
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const std::vector<std::string>& new_tokens,
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bool utf8) const
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{
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if (utf8) {
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#ifndef BOOST_NO_STD_WSTRING
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// Need to convert to local encoding.
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std::vector<string> local_tokens;
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for (unsigned i = 0; i < new_tokens.size(); ++i) {
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std::wstring w = from_utf8(new_tokens[i]);
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local_tokens.push_back(to_local_8_bit(w));
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}
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xparse(value_store, local_tokens);
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#else
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boost::throw_exception(
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std::runtime_error("UTF-8 conversion not supported."));
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#endif
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} else {
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// Already in local encoding, pass unmodified
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xparse(value_store, new_tokens);
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}
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}
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#ifndef BOOST_NO_STD_WSTRING
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void
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value_semantic_codecvt_helper<wchar_t>::
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parse(boost::any& value_store,
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const std::vector<std::string>& new_tokens,
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bool utf8) const
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{
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std::vector<wstring> tokens;
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if (utf8) {
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// Convert from utf8
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for (unsigned i = 0; i < new_tokens.size(); ++i) {
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tokens.push_back(from_utf8(new_tokens[i]));
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}
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} else {
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// Convert from local encoding
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for (unsigned i = 0; i < new_tokens.size(); ++i) {
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tokens.push_back(from_local_8_bit(new_tokens[i]));
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}
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}
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xparse(value_store, tokens);
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}
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#endif
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BOOST_PROGRAM_OPTIONS_DECL std::string arg("arg");
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std::string
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untyped_value::name() const
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{
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return arg;
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}
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unsigned
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untyped_value::min_tokens() const
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{
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if (m_zero_tokens)
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return 0;
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else
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return 1;
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}
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unsigned
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untyped_value::max_tokens() const
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{
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if (m_zero_tokens)
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return 0;
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else
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return 1;
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}
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void
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untyped_value::xparse(boost::any& value_store,
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const std::vector<std::string>& new_tokens) const
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{
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if (!value_store.empty())
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boost::throw_exception(
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multiple_occurrences());
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if (new_tokens.size() > 1)
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boost::throw_exception(multiple_values());
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value_store = new_tokens.empty() ? std::string("") : new_tokens.front();
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}
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BOOST_PROGRAM_OPTIONS_DECL typed_value<bool>*
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bool_switch()
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{
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return bool_switch(0);
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}
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BOOST_PROGRAM_OPTIONS_DECL typed_value<bool>*
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bool_switch(bool* v)
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{
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typed_value<bool>* r = new typed_value<bool>(v);
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r->default_value(0);
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r->zero_tokens();
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return r;
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}
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/* Validates bool value.
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Any of "1", "true", "yes", "on" will be converted to "1".<br>
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Any of "0", "false", "no", "off" will be converted to "0".<br>
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Case is ignored. The 'xs' vector can either be empty, in which
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case the value is 'true', or can contain explicit value.
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*/
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BOOST_PROGRAM_OPTIONS_DECL void validate(any& v, const vector<string>& xs,
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bool*, int)
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{
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check_first_occurrence(v);
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string s(get_single_string(xs, true));
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for (size_t i = 0; i < s.size(); ++i)
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s[i] = char(tolower(s[i]));
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if (s.empty() || s == "on" || s == "yes" || s == "1" || s == "true")
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v = any(true);
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else if (s == "off" || s == "no" || s == "0" || s == "false")
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v = any(false);
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else
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boost::throw_exception(validation_error(validation_error::invalid_bool_value, s));
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}
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// This is blatant copy-paste. However, templating this will cause a problem,
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// since wstring can't be constructed/compared with char*. We'd need to
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// create auxiliary 'widen' routine to convert from char* into
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// needed string type, and that's more work.
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#if !defined(BOOST_NO_STD_WSTRING)
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BOOST_PROGRAM_OPTIONS_DECL
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void validate(any& v, const vector<wstring>& xs, bool*, int)
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{
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check_first_occurrence(v);
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wstring s(get_single_string(xs, true));
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for (size_t i = 0; i < s.size(); ++i)
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s[i] = wchar_t(tolower(s[i]));
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if (s.empty() || s == L"on" || s == L"yes" || s == L"1" || s == L"true")
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v = any(true);
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else if (s == L"off" || s == L"no" || s == L"0" || s == L"false")
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v = any(false);
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else
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boost::throw_exception(validation_error(validation_error::invalid_bool_value));
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}
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#endif
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BOOST_PROGRAM_OPTIONS_DECL
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void validate(any& v, const vector<string>& xs, std::string*, int)
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{
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check_first_occurrence(v);
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v = any(get_single_string(xs));
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}
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#if !defined(BOOST_NO_STD_WSTRING)
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BOOST_PROGRAM_OPTIONS_DECL
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void validate(any& v, const vector<wstring>& xs, std::string*, int)
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{
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check_first_occurrence(v);
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v = any(get_single_string(xs));
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}
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#endif
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namespace validators {
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BOOST_PROGRAM_OPTIONS_DECL
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void check_first_occurrence(const boost::any& value)
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{
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if (!value.empty())
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boost::throw_exception(
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multiple_occurrences());
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}
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}
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invalid_option_value::
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invalid_option_value(const std::string& bad_value)
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: validation_error(validation_error::invalid_option_value, bad_value)
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{}
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#ifndef BOOST_NO_STD_WSTRING
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namespace
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{
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std::string convert_value(const std::wstring& s)
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{
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try {
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return to_local_8_bit(s);
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}
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catch(const std::exception&) {
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return "<unrepresentable unicode string>";
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}
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}
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}
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invalid_option_value::
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invalid_option_value(const std::wstring& bad_value)
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: validation_error(validation_error::invalid_option_value, convert_value(bad_value))
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{}
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#endif
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const std::string&
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unknown_option::get_option_name() const throw()
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{
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return m_option_name;
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}
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const std::string&
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ambiguous_option::get_option_name() const throw()
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{
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return m_option_name;
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}
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const std::vector<std::string>&
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ambiguous_option::alternatives() const throw()
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{
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return m_alternatives;
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}
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void
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multiple_values::set_option_name(const std::string& option_name)
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{
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m_option_name = option_name;
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}
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const std::string&
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multiple_values::get_option_name() const throw()
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{
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return m_option_name;
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}
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void
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multiple_occurrences::set_option_name(const std::string& option_name)
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{
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m_option_name = option_name;
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}
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const std::string&
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multiple_occurrences::get_option_name() const throw()
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{
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return m_option_name;
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}
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validation_error::
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validation_error(kind_t kind,
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const std::string& option_value,
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const std::string& option_name)
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: error("")
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, m_kind(kind)
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, m_option_name(option_name)
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, m_option_value(option_value)
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, m_message(error_message(kind))
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{
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if (!option_value.empty())
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{
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m_message.append(std::string("'") + option_value + std::string("'"));
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}
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}
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void
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validation_error::set_option_name(const std::string& option_name)
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{
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m_option_name = option_name;
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}
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const std::string&
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validation_error::get_option_name() const throw()
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{
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return m_option_name;
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}
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std::string
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validation_error::error_message(kind_t kind)
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{
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// Initially, store the message in 'const char*' variable,
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// to avoid conversion to std::string in all cases.
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const char* msg;
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switch(kind)
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{
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case multiple_values_not_allowed:
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msg = "multiple values not allowed";
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break;
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case at_least_one_value_required:
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msg = "at least one value required";
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break;
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case invalid_bool_value:
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msg = "invalid bool value";
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break;
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case invalid_option_value:
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msg = "invalid option value";
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break;
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case invalid_option:
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msg = "invalid option";
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break;
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default:
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msg = "unknown error";
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}
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return msg;
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}
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const char*
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validation_error::what() const throw()
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{
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if (!m_option_name.empty())
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{
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m_message = "in option '" + m_option_name + "': "
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+ error_message(m_kind);
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}
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return m_message.c_str();
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}
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const std::string&
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required_option::get_option_name() const throw()
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{
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return m_option_name;
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}
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}}
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