601 lines
15 KiB
C++
601 lines
15 KiB
C++
// tuple_io.hpp --------------------------------------------------------------
|
|
|
|
// Copyright (C) 2001 Jaakko Jarvi (jaakko.jarvi@cs.utu.fi)
|
|
// 2001 Gary Powell (gary.powell@sierra.com)
|
|
//
|
|
// 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)
|
|
// For more information, see http://www.boost.org
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
#ifndef BOOST_TUPLE_IO_HPP
|
|
#define BOOST_TUPLE_IO_HPP
|
|
|
|
|
|
// add to boost/config.hpp
|
|
// for now
|
|
# if defined __GNUC__
|
|
# if (__GNUC__ == 2 && __GNUC_MINOR__ <= 97)
|
|
#define BOOST_NO_TEMPLATED_STREAMS
|
|
#endif
|
|
#endif // __GNUC__
|
|
|
|
#if defined BOOST_NO_TEMPLATED_STREAMS
|
|
#include <iostream>
|
|
#else
|
|
#include <istream>
|
|
#include <ostream>
|
|
#endif
|
|
|
|
#include <sstream>
|
|
|
|
#include "boost/tuple/tuple.hpp"
|
|
|
|
// This is ugly: one should be using twoargument isspace since whitspace can
|
|
// be locale dependent, in theory at least.
|
|
// not all libraries implement have the two-arg version, so we need to
|
|
// use the one-arg one, which one should get with <cctype> but there seem
|
|
// to be exceptions to this.
|
|
|
|
#if !defined (BOOST_NO_STD_LOCALE)
|
|
|
|
#include <locale> // for two-arg isspace
|
|
|
|
#else
|
|
|
|
#include <cctype> // for one-arg (old) isspace
|
|
#include <ctype.h> // Metrowerks does not find one-arg isspace from cctype
|
|
|
|
#endif
|
|
|
|
namespace boost {
|
|
namespace tuples {
|
|
|
|
namespace detail {
|
|
|
|
class format_info {
|
|
public:
|
|
|
|
enum manipulator_type { open, close, delimiter };
|
|
BOOST_STATIC_CONSTANT(int, number_of_manipulators = delimiter + 1);
|
|
private:
|
|
|
|
static int get_stream_index (int m)
|
|
{
|
|
static const int stream_index[number_of_manipulators]
|
|
= { std::ios::xalloc(), std::ios::xalloc(), std::ios::xalloc() };
|
|
|
|
return stream_index[m];
|
|
}
|
|
|
|
format_info(const format_info&);
|
|
format_info();
|
|
|
|
|
|
public:
|
|
|
|
#if defined (BOOST_NO_TEMPLATED_STREAMS)
|
|
static char get_manipulator(std::ios& i, manipulator_type m) {
|
|
char c = static_cast<char>(i.iword(get_stream_index(m)));
|
|
|
|
// parentheses and space are the default manipulators
|
|
if (!c) {
|
|
switch(m) {
|
|
case detail::format_info::open : c = '('; break;
|
|
case detail::format_info::close : c = ')'; break;
|
|
case detail::format_info::delimiter : c = ' '; break;
|
|
}
|
|
}
|
|
return c;
|
|
}
|
|
|
|
static void set_manipulator(std::ios& i, manipulator_type m, char c) {
|
|
i.iword(get_stream_index(m)) = static_cast<long>(c);
|
|
}
|
|
#else
|
|
template<class CharType, class CharTrait>
|
|
static CharType get_manipulator(std::basic_ios<CharType, CharTrait>& i,
|
|
manipulator_type m) {
|
|
// The manipulators are stored as long.
|
|
// A valid instanitation of basic_stream allows CharType to be any POD,
|
|
// hence, the static_cast may fail (it fails if long is not convertible
|
|
// to CharType
|
|
CharType c = static_cast<CharType>(i.iword(get_stream_index(m)) );
|
|
// parentheses and space are the default manipulators
|
|
if (!c) {
|
|
switch(m) {
|
|
case detail::format_info::open : c = i.widen('('); break;
|
|
case detail::format_info::close : c = i.widen(')'); break;
|
|
case detail::format_info::delimiter : c = i.widen(' '); break;
|
|
}
|
|
}
|
|
return c;
|
|
}
|
|
|
|
|
|
template<class CharType, class CharTrait>
|
|
static void set_manipulator(std::basic_ios<CharType, CharTrait>& i,
|
|
manipulator_type m, CharType c) {
|
|
// The manipulators are stored as long.
|
|
// A valid instanitation of basic_stream allows CharType to be any POD,
|
|
// hence, the static_cast may fail (it fails if CharType is not
|
|
// convertible long.
|
|
i.iword(get_stream_index(m)) = static_cast<long>(c);
|
|
}
|
|
#endif // BOOST_NO_TEMPLATED_STREAMS
|
|
};
|
|
|
|
} // end of namespace detail
|
|
|
|
template<class CharType>
|
|
class tuple_manipulator {
|
|
const detail::format_info::manipulator_type mt;
|
|
CharType f_c;
|
|
public:
|
|
explicit tuple_manipulator(detail::format_info::manipulator_type m,
|
|
const char c = 0)
|
|
: mt(m), f_c(c) {}
|
|
|
|
#if defined (BOOST_NO_TEMPLATED_STREAMS)
|
|
void set(std::ios &io) const {
|
|
detail::format_info::set_manipulator(io, mt, f_c);
|
|
}
|
|
#else
|
|
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
|
template<class CharType2, class CharTrait>
|
|
void set(std::basic_ios<CharType2, CharTrait> &io) const {
|
|
detail::format_info::set_manipulator(io, mt, f_c);
|
|
}
|
|
#else
|
|
template<class CharTrait>
|
|
void set(std::basic_ios<CharType, CharTrait> &io) const {
|
|
detail::format_info::set_manipulator(io, mt, f_c);
|
|
}
|
|
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
#endif // BOOST_NO_TEMPLATED_STREAMS
|
|
};
|
|
|
|
#if defined (BOOST_NO_TEMPLATED_STREAMS)
|
|
inline std::ostream&
|
|
operator<<(std::ostream& o, const tuple_manipulator<char>& m) {
|
|
m.set(o);
|
|
return o;
|
|
}
|
|
|
|
inline std::istream&
|
|
operator>>(std::istream& i, const tuple_manipulator<char>& m) {
|
|
m.set(i);
|
|
return i;
|
|
}
|
|
|
|
#else
|
|
|
|
template<class CharType, class CharTrait>
|
|
inline std::basic_ostream<CharType, CharTrait>&
|
|
operator<<(std::basic_ostream<CharType, CharTrait>& o, const tuple_manipulator<CharType>& m) {
|
|
m.set(o);
|
|
return o;
|
|
}
|
|
|
|
template<class CharType, class CharTrait>
|
|
inline std::basic_istream<CharType, CharTrait>&
|
|
operator>>(std::basic_istream<CharType, CharTrait>& i, const tuple_manipulator<CharType>& m) {
|
|
m.set(i);
|
|
return i;
|
|
}
|
|
|
|
#endif // BOOST_NO_TEMPLATED_STREAMS
|
|
|
|
template<class CharType>
|
|
inline tuple_manipulator<CharType> set_open(const CharType c) {
|
|
return tuple_manipulator<CharType>(detail::format_info::open, c);
|
|
}
|
|
|
|
template<class CharType>
|
|
inline tuple_manipulator<CharType> set_close(const CharType c) {
|
|
return tuple_manipulator<CharType>(detail::format_info::close, c);
|
|
}
|
|
|
|
template<class CharType>
|
|
inline tuple_manipulator<CharType> set_delimiter(const CharType c) {
|
|
return tuple_manipulator<CharType>(detail::format_info::delimiter, c);
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
// -------------------------------------------------------------
|
|
// printing tuples to ostream in format (a b c)
|
|
// parentheses and space are defaults, but can be overriden with manipulators
|
|
// set_open, set_close and set_delimiter
|
|
|
|
namespace detail {
|
|
|
|
// Note: The order of the print functions is critical
|
|
// to let a conforming compiler find and select the correct one.
|
|
|
|
#if defined (BOOST_NO_TEMPLATED_STREAMS)
|
|
|
|
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
|
template<class T1>
|
|
inline std::ostream& print(std::ostream& o, const cons<T1, null_type>& t) {
|
|
return o << t.head;
|
|
}
|
|
#endif // BOOST_NO_TEMPLATED_STREAMS
|
|
|
|
inline std::ostream& print(std::ostream& o, const null_type&) { return o; }
|
|
|
|
template<class T1, class T2>
|
|
inline std::ostream&
|
|
print(std::ostream& o, const cons<T1, T2>& t) {
|
|
|
|
const char d = format_info::get_manipulator(o, format_info::delimiter);
|
|
|
|
o << t.head;
|
|
|
|
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
|
if (tuples::length<T2>::value == 0)
|
|
return o;
|
|
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
o << d;
|
|
|
|
return print(o, t.tail );
|
|
|
|
}
|
|
|
|
template<class T>
|
|
inline bool handle_width(std::ostream& o, const T& t) {
|
|
std::streamsize width = o.width();
|
|
if(width == 0) return false;
|
|
|
|
std::ostringstream ss;
|
|
|
|
ss.copyfmt(o);
|
|
ss.tie(0);
|
|
ss.width(0);
|
|
|
|
ss << t;
|
|
o << ss.str();
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
#else
|
|
|
|
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
|
template<class CharType, class CharTrait, class T1>
|
|
inline std::basic_ostream<CharType, CharTrait>&
|
|
print(std::basic_ostream<CharType, CharTrait>& o, const cons<T1, null_type>& t) {
|
|
return o << t.head;
|
|
}
|
|
#endif // !BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
|
|
|
|
template<class CharType, class CharTrait>
|
|
inline std::basic_ostream<CharType, CharTrait>&
|
|
print(std::basic_ostream<CharType, CharTrait>& o, const null_type&) {
|
|
return o;
|
|
}
|
|
|
|
template<class CharType, class CharTrait, class T1, class T2>
|
|
inline std::basic_ostream<CharType, CharTrait>&
|
|
print(std::basic_ostream<CharType, CharTrait>& o, const cons<T1, T2>& t) {
|
|
|
|
const CharType d = format_info::get_manipulator(o, format_info::delimiter);
|
|
|
|
o << t.head;
|
|
|
|
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
|
if (tuples::length<T2>::value == 0)
|
|
return o;
|
|
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
o << d;
|
|
|
|
return print(o, t.tail);
|
|
}
|
|
|
|
template<class CharT, class Traits, class T>
|
|
inline bool handle_width(std::basic_ostream<CharT, Traits>& o, const T& t) {
|
|
std::streamsize width = o.width();
|
|
if(width == 0) return false;
|
|
|
|
std::basic_ostringstream<CharT, Traits> ss;
|
|
|
|
ss.copyfmt(o);
|
|
ss.tie(0);
|
|
ss.width(0);
|
|
|
|
ss << t;
|
|
o << ss.str();
|
|
|
|
return true;
|
|
}
|
|
|
|
#endif // BOOST_NO_TEMPLATED_STREAMS
|
|
|
|
} // namespace detail
|
|
|
|
#if defined (BOOST_NO_TEMPLATED_STREAMS)
|
|
|
|
inline std::ostream& operator<<(std::ostream& o, const null_type& t) {
|
|
if (!o.good() ) return o;
|
|
if (detail::handle_width(o, t)) return o;
|
|
|
|
const char l =
|
|
detail::format_info::get_manipulator(o, detail::format_info::open);
|
|
const char r =
|
|
detail::format_info::get_manipulator(o, detail::format_info::close);
|
|
|
|
o << l;
|
|
o << r;
|
|
|
|
return o;
|
|
}
|
|
|
|
template<class T1, class T2>
|
|
inline std::ostream& operator<<(std::ostream& o, const cons<T1, T2>& t) {
|
|
if (!o.good() ) return o;
|
|
if (detail::handle_width(o, t)) return o;
|
|
|
|
const char l =
|
|
detail::format_info::get_manipulator(o, detail::format_info::open);
|
|
const char r =
|
|
detail::format_info::get_manipulator(o, detail::format_info::close);
|
|
|
|
o << l;
|
|
|
|
detail::print(o, t);
|
|
|
|
o << r;
|
|
|
|
return o;
|
|
}
|
|
|
|
#else
|
|
|
|
template<class CharType, class CharTrait>
|
|
inline std::basic_ostream<CharType, CharTrait>&
|
|
operator<<(std::basic_ostream<CharType, CharTrait>& o,
|
|
const null_type& t) {
|
|
if (!o.good() ) return o;
|
|
if (detail::handle_width(o, t)) return o;
|
|
|
|
const CharType l =
|
|
detail::format_info::get_manipulator(o, detail::format_info::open);
|
|
const CharType r =
|
|
detail::format_info::get_manipulator(o, detail::format_info::close);
|
|
|
|
o << l;
|
|
o << r;
|
|
|
|
return o;
|
|
}
|
|
|
|
template<class CharType, class CharTrait, class T1, class T2>
|
|
inline std::basic_ostream<CharType, CharTrait>&
|
|
operator<<(std::basic_ostream<CharType, CharTrait>& o,
|
|
const cons<T1, T2>& t) {
|
|
if (!o.good() ) return o;
|
|
if (detail::handle_width(o, t)) return o;
|
|
|
|
const CharType l =
|
|
detail::format_info::get_manipulator(o, detail::format_info::open);
|
|
const CharType r =
|
|
detail::format_info::get_manipulator(o, detail::format_info::close);
|
|
|
|
o << l;
|
|
|
|
detail::print(o, t);
|
|
|
|
o << r;
|
|
|
|
return o;
|
|
}
|
|
#endif // BOOST_NO_TEMPLATED_STREAMS
|
|
|
|
|
|
// -------------------------------------------------------------
|
|
// input stream operators
|
|
|
|
namespace detail {
|
|
|
|
#if defined (BOOST_NO_TEMPLATED_STREAMS)
|
|
|
|
inline std::istream&
|
|
extract_and_check_delimiter(
|
|
std::istream& is, format_info::manipulator_type del)
|
|
{
|
|
const char d = format_info::get_manipulator(is, del);
|
|
|
|
#if defined (BOOST_NO_STD_LOCALE)
|
|
const bool is_delimiter = !isspace(d);
|
|
#else
|
|
const bool is_delimiter = (!std::isspace(d, is.getloc()) );
|
|
#endif
|
|
|
|
char c;
|
|
if (is_delimiter) {
|
|
is >> c;
|
|
if (is.good() && c!=d) {
|
|
is.setstate(std::ios::failbit);
|
|
}
|
|
} else {
|
|
is >> std::ws;
|
|
}
|
|
return is;
|
|
}
|
|
|
|
|
|
// Note: The order of the read functions is critical to let a
|
|
// (conforming?) compiler find and select the correct one.
|
|
|
|
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
|
template<class T1>
|
|
inline std::istream &
|
|
read (std::istream &is, cons<T1, null_type>& t1) {
|
|
|
|
if (!is.good()) return is;
|
|
|
|
return is >> t1.head ;
|
|
}
|
|
#else
|
|
inline std::istream& read(std::istream& i, const null_type&) { return i; }
|
|
#endif // !BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
|
|
template<class T1, class T2>
|
|
inline std::istream&
|
|
read(std::istream &is, cons<T1, T2>& t1) {
|
|
|
|
if (!is.good()) return is;
|
|
|
|
is >> t1.head;
|
|
|
|
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
|
if (tuples::length<T2>::value == 0)
|
|
return is;
|
|
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
|
|
extract_and_check_delimiter(is, format_info::delimiter);
|
|
|
|
return read(is, t1.tail);
|
|
}
|
|
|
|
} // end namespace detail
|
|
|
|
inline std::istream&
|
|
operator>>(std::istream &is, null_type&) {
|
|
|
|
if (!is.good() ) return is;
|
|
|
|
detail::extract_and_check_delimiter(is, detail::format_info::open);
|
|
detail::extract_and_check_delimiter(is, detail::format_info::close);
|
|
|
|
return is;
|
|
}
|
|
|
|
|
|
template<class T1, class T2>
|
|
inline std::istream&
|
|
operator>>(std::istream& is, cons<T1, T2>& t1) {
|
|
|
|
if (!is.good() ) return is;
|
|
|
|
detail::extract_and_check_delimiter(is, detail::format_info::open);
|
|
|
|
detail::read(is, t1);
|
|
|
|
detail::extract_and_check_delimiter(is, detail::format_info::close);
|
|
|
|
return is;
|
|
}
|
|
|
|
|
|
|
|
#else
|
|
|
|
template<class CharType, class CharTrait>
|
|
inline std::basic_istream<CharType, CharTrait>&
|
|
extract_and_check_delimiter(
|
|
std::basic_istream<CharType, CharTrait> &is, format_info::manipulator_type del)
|
|
{
|
|
const CharType d = format_info::get_manipulator(is, del);
|
|
|
|
#if defined (BOOST_NO_STD_LOCALE)
|
|
const bool is_delimiter = !isspace(d);
|
|
#elif defined ( __BORLANDC__ )
|
|
const bool is_delimiter = !std::use_facet< std::ctype< CharType > >
|
|
(is.getloc() ).is( std::ctype_base::space, d);
|
|
#else
|
|
const bool is_delimiter = (!std::isspace(d, is.getloc()) );
|
|
#endif
|
|
|
|
CharType c;
|
|
if (is_delimiter) {
|
|
is >> c;
|
|
if (is.good() && c!=d) {
|
|
is.setstate(std::ios::failbit);
|
|
}
|
|
} else {
|
|
is >> std::ws;
|
|
}
|
|
return is;
|
|
}
|
|
|
|
|
|
#if !defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
|
template<class CharType, class CharTrait, class T1>
|
|
inline std::basic_istream<CharType, CharTrait> &
|
|
read (std::basic_istream<CharType, CharTrait> &is, cons<T1, null_type>& t1) {
|
|
|
|
if (!is.good()) return is;
|
|
|
|
return is >> t1.head;
|
|
}
|
|
#else
|
|
template<class CharType, class CharTrait>
|
|
inline std::basic_istream<CharType, CharTrait>&
|
|
read(std::basic_istream<CharType, CharTrait>& i, const null_type&) { return i; }
|
|
|
|
#endif // !BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
|
|
template<class CharType, class CharTrait, class T1, class T2>
|
|
inline std::basic_istream<CharType, CharTrait>&
|
|
read(std::basic_istream<CharType, CharTrait> &is, cons<T1, T2>& t1) {
|
|
|
|
if (!is.good()) return is;
|
|
|
|
is >> t1.head;
|
|
|
|
#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION)
|
|
if (tuples::length<T2>::value == 0)
|
|
return is;
|
|
#endif // BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION
|
|
|
|
extract_and_check_delimiter(is, format_info::delimiter);
|
|
|
|
return read(is, t1.tail);
|
|
}
|
|
|
|
} // end namespace detail
|
|
|
|
|
|
template<class CharType, class CharTrait>
|
|
inline std::basic_istream<CharType, CharTrait>&
|
|
operator>>(std::basic_istream<CharType, CharTrait> &is, null_type&) {
|
|
|
|
if (!is.good() ) return is;
|
|
|
|
detail::extract_and_check_delimiter(is, detail::format_info::open);
|
|
detail::extract_and_check_delimiter(is, detail::format_info::close);
|
|
|
|
return is;
|
|
}
|
|
|
|
template<class CharType, class CharTrait, class T1, class T2>
|
|
inline std::basic_istream<CharType, CharTrait>&
|
|
operator>>(std::basic_istream<CharType, CharTrait>& is, cons<T1, T2>& t1) {
|
|
|
|
if (!is.good() ) return is;
|
|
|
|
detail::extract_and_check_delimiter(is, detail::format_info::open);
|
|
|
|
detail::read(is, t1);
|
|
|
|
detail::extract_and_check_delimiter(is, detail::format_info::close);
|
|
|
|
return is;
|
|
}
|
|
|
|
#endif // BOOST_NO_TEMPLATED_STREAMS
|
|
|
|
} // end of namespace tuples
|
|
} // end of namespace boost
|
|
|
|
#endif // BOOST_TUPLE_IO_HPP
|
|
|
|
|