You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
352 lines
10 KiB
352 lines
10 KiB
// filesystem path_traits.hpp --------------------------------------------------------// |
|
|
|
// Copyright Beman Dawes 2009 |
|
|
|
// Distributed under the Boost Software License, Version 1.0. |
|
// See http://www.boost.org/LICENSE_1_0.txt |
|
|
|
// Library home page: http://www.boost.org/libs/filesystem |
|
|
|
#ifndef BOOST_FILESYSTEM_PATH_TRAITS_HPP |
|
#define BOOST_FILESYSTEM_PATH_TRAITS_HPP |
|
|
|
#include <boost/config.hpp> |
|
|
|
# if defined( BOOST_NO_STD_WSTRING ) |
|
# error Configuration not supported: Boost.Filesystem V3 and later requires std::wstring support |
|
# endif |
|
|
|
#include <boost/filesystem/config.hpp> |
|
#include <boost/type_traits/is_array.hpp> |
|
#include <boost/type_traits/decay.hpp> |
|
#include <boost/system/error_code.hpp> |
|
#include <boost/core/enable_if.hpp> |
|
#include <cwchar> // for mbstate_t |
|
#include <string> |
|
#include <vector> |
|
#include <list> |
|
#include <iterator> |
|
#include <locale> |
|
#include <boost/assert.hpp> |
|
// #include <iostream> //**** comment me out **** |
|
|
|
#include <boost/config/abi_prefix.hpp> // must be the last #include |
|
|
|
namespace boost { namespace filesystem { |
|
|
|
BOOST_FILESYSTEM_DECL const system::error_category& codecvt_error_category(); |
|
// uses std::codecvt_base::result used for error codes: |
|
// |
|
// ok: Conversion successful. |
|
// partial: Not all source characters converted; one or more additional source |
|
// characters are needed to produce the final target character, or the |
|
// size of the target intermediate buffer was too small to hold the result. |
|
// error: A character in the source could not be converted to the target encoding. |
|
// noconv: The source and target characters have the same type and encoding, so no |
|
// conversion was necessary. |
|
|
|
class directory_entry; |
|
|
|
namespace path_traits { |
|
|
|
typedef std::codecvt<wchar_t, char, std::mbstate_t> codecvt_type; |
|
|
|
// is_pathable type trait; allows disabling over-agressive class path member templates |
|
|
|
template <class T> |
|
struct is_pathable { static const bool value = false; }; |
|
|
|
template<> struct is_pathable<char*> { static const bool value = true; }; |
|
template<> struct is_pathable<const char*> { static const bool value = true; }; |
|
template<> struct is_pathable<wchar_t*> { static const bool value = true; }; |
|
template<> struct is_pathable<const wchar_t*> { static const bool value = true; }; |
|
template<> struct is_pathable<std::string> { static const bool value = true; }; |
|
template<> struct is_pathable<std::wstring> { static const bool value = true; }; |
|
template<> struct is_pathable<std::vector<char> > { static const bool value = true; }; |
|
template<> struct is_pathable<std::vector<wchar_t> > { static const bool value = true; }; |
|
template<> struct is_pathable<std::list<char> > { static const bool value = true; }; |
|
template<> struct is_pathable<std::list<wchar_t> > { static const bool value = true; }; |
|
template<> struct is_pathable<directory_entry> { static const bool value = true; }; |
|
|
|
// Pathable empty |
|
|
|
template <class Container> inline |
|
// disable_if aids broken compilers (IBM, old GCC, etc.) and is harmless for |
|
// conforming compilers. Replace by plain "bool" at some future date (2012?) |
|
typename boost::disable_if<boost::is_array<Container>, bool>::type |
|
empty(const Container & c) |
|
{ return c.begin() == c.end(); } |
|
|
|
template <class T> inline |
|
bool empty(T * const & c_str) |
|
{ |
|
BOOST_ASSERT(c_str); |
|
return !*c_str; |
|
} |
|
|
|
template <typename T, size_t N> inline |
|
bool empty(T (&x)[N]) |
|
{ return !x[0]; } |
|
|
|
// value types differ ---------------------------------------------------------------// |
|
// |
|
// A from_end argument of 0 is less efficient than a known end, so use only if needed |
|
|
|
// with codecvt |
|
|
|
BOOST_FILESYSTEM_DECL |
|
void convert(const char* from, |
|
const char* from_end, // 0 for null terminated MBCS |
|
std::wstring & to, |
|
const codecvt_type& cvt); |
|
|
|
BOOST_FILESYSTEM_DECL |
|
void convert(const wchar_t* from, |
|
const wchar_t* from_end, // 0 for null terminated MBCS |
|
std::string & to, |
|
const codecvt_type& cvt); |
|
|
|
inline |
|
void convert(const char* from, |
|
std::wstring & to, |
|
const codecvt_type& cvt) |
|
{ |
|
BOOST_ASSERT(from); |
|
convert(from, 0, to, cvt); |
|
} |
|
|
|
inline |
|
void convert(const wchar_t* from, |
|
std::string & to, |
|
const codecvt_type& cvt) |
|
{ |
|
BOOST_ASSERT(from); |
|
convert(from, 0, to, cvt); |
|
} |
|
|
|
// without codecvt |
|
|
|
inline |
|
void convert(const char* from, |
|
const char* from_end, // 0 for null terminated MBCS |
|
std::wstring & to); |
|
|
|
inline |
|
void convert(const wchar_t* from, |
|
const wchar_t* from_end, // 0 for null terminated MBCS |
|
std::string & to); |
|
|
|
inline |
|
void convert(const char* from, |
|
std::wstring & to); |
|
|
|
inline |
|
void convert(const wchar_t* from, |
|
std::string & to); |
|
|
|
// value types same -----------------------------------------------------------------// |
|
|
|
// char with codecvt |
|
|
|
inline |
|
void convert(const char* from, const char* from_end, std::string & to, |
|
const codecvt_type&) |
|
{ |
|
BOOST_ASSERT(from); |
|
BOOST_ASSERT(from_end); |
|
to.append(from, from_end); |
|
} |
|
|
|
inline |
|
void convert(const char* from, |
|
std::string & to, |
|
const codecvt_type&) |
|
{ |
|
BOOST_ASSERT(from); |
|
to += from; |
|
} |
|
|
|
// wchar_t with codecvt |
|
|
|
inline |
|
void convert(const wchar_t* from, const wchar_t* from_end, std::wstring & to, |
|
const codecvt_type&) |
|
{ |
|
BOOST_ASSERT(from); |
|
BOOST_ASSERT(from_end); |
|
to.append(from, from_end); |
|
} |
|
|
|
inline |
|
void convert(const wchar_t* from, |
|
std::wstring & to, |
|
const codecvt_type&) |
|
{ |
|
BOOST_ASSERT(from); |
|
to += from; |
|
} |
|
|
|
// char without codecvt |
|
|
|
inline |
|
void convert(const char* from, const char* from_end, std::string & to) |
|
{ |
|
BOOST_ASSERT(from); |
|
BOOST_ASSERT(from_end); |
|
to.append(from, from_end); |
|
} |
|
|
|
inline |
|
void convert(const char* from, std::string & to) |
|
{ |
|
BOOST_ASSERT(from); |
|
to += from; |
|
} |
|
|
|
// wchar_t without codecvt |
|
|
|
inline |
|
void convert(const wchar_t* from, const wchar_t* from_end, std::wstring & to) |
|
{ |
|
BOOST_ASSERT(from); |
|
BOOST_ASSERT(from_end); |
|
to.append(from, from_end); |
|
} |
|
|
|
inline |
|
void convert(const wchar_t* from, std::wstring & to) |
|
{ |
|
BOOST_ASSERT(from); |
|
to += from; |
|
} |
|
|
|
// Source dispatch -----------------------------------------------------------------// |
|
|
|
// contiguous containers with codecvt |
|
template <class U> inline |
|
void dispatch(const std::string& c, U& to, const codecvt_type& cvt) |
|
{ |
|
if (c.size()) |
|
convert(&*c.begin(), &*c.begin() + c.size(), to, cvt); |
|
} |
|
template <class U> inline |
|
void dispatch(const std::wstring& c, U& to, const codecvt_type& cvt) |
|
{ |
|
if (c.size()) |
|
convert(&*c.begin(), &*c.begin() + c.size(), to, cvt); |
|
} |
|
template <class U> inline |
|
void dispatch(const std::vector<char>& c, U& to, const codecvt_type& cvt) |
|
{ |
|
if (c.size()) |
|
convert(&*c.begin(), &*c.begin() + c.size(), to, cvt); |
|
} |
|
template <class U> inline |
|
void dispatch(const std::vector<wchar_t>& c, U& to, const codecvt_type& cvt) |
|
{ |
|
if (c.size()) |
|
convert(&*c.begin(), &*c.begin() + c.size(), to, cvt); |
|
} |
|
|
|
// contiguous containers without codecvt |
|
template <class U> inline |
|
void dispatch(const std::string& c, U& to) |
|
{ |
|
if (c.size()) |
|
convert(&*c.begin(), &*c.begin() + c.size(), to); |
|
} |
|
template <class U> inline |
|
void dispatch(const std::wstring& c, U& to) |
|
{ |
|
if (c.size()) |
|
convert(&*c.begin(), &*c.begin() + c.size(), to); |
|
} |
|
template <class U> inline |
|
void dispatch(const std::vector<char>& c, U& to) |
|
{ |
|
if (c.size()) |
|
convert(&*c.begin(), &*c.begin() + c.size(), to); |
|
} |
|
template <class U> inline |
|
void dispatch(const std::vector<wchar_t>& c, U& to) |
|
{ |
|
if (c.size()) |
|
convert(&*c.begin(), &*c.begin() + c.size(), to); |
|
} |
|
|
|
// non-contiguous containers with codecvt |
|
template <class Container, class U> inline |
|
// disable_if aids broken compilers (IBM, old GCC, etc.) and is harmless for |
|
// conforming compilers. Replace by plain "void" at some future date (2012?) |
|
typename boost::disable_if<boost::is_array<Container>, void>::type |
|
dispatch(const Container & c, U& to, const codecvt_type& cvt) |
|
{ |
|
if (c.size()) |
|
{ |
|
std::basic_string<typename Container::value_type> s(c.begin(), c.end()); |
|
convert(s.c_str(), s.c_str()+s.size(), to, cvt); |
|
} |
|
} |
|
|
|
// c_str |
|
template <class T, class U> inline |
|
void dispatch(T * const & c_str, U& to, const codecvt_type& cvt) |
|
{ |
|
// std::cout << "dispatch() const T *\n"; |
|
BOOST_ASSERT(c_str); |
|
convert(c_str, to, cvt); |
|
} |
|
|
|
// Note: there is no dispatch on C-style arrays because the array may |
|
// contain a string smaller than the array size. |
|
|
|
BOOST_FILESYSTEM_DECL |
|
void dispatch(const directory_entry & de, |
|
# ifdef BOOST_WINDOWS_API |
|
std::wstring & to, |
|
# else |
|
std::string & to, |
|
# endif |
|
const codecvt_type&); |
|
|
|
// non-contiguous containers without codecvt |
|
template <class Container, class U> inline |
|
// disable_if aids broken compilers (IBM, old GCC, etc.) and is harmless for |
|
// conforming compilers. Replace by plain "void" at some future date (2012?) |
|
typename boost::disable_if<boost::is_array<Container>, void>::type |
|
dispatch(const Container & c, U& to) |
|
{ |
|
if (c.size()) |
|
{ |
|
std::basic_string<typename Container::value_type> seq(c.begin(), c.end()); |
|
convert(seq.c_str(), seq.c_str()+seq.size(), to); |
|
} |
|
} |
|
|
|
// c_str |
|
template <class T, class U> inline |
|
void dispatch(T * const & c_str, U& to) |
|
{ |
|
// std::cout << "dispatch() const T *\n"; |
|
BOOST_ASSERT(c_str); |
|
convert(c_str, to); |
|
} |
|
|
|
// Note: there is no dispatch on C-style arrays because the array may |
|
// contain a string smaller than the array size. |
|
|
|
BOOST_FILESYSTEM_DECL |
|
void dispatch(const directory_entry & de, |
|
# ifdef BOOST_WINDOWS_API |
|
std::wstring & to |
|
# else |
|
std::string & to |
|
# endif |
|
); |
|
|
|
|
|
}}} // namespace boost::filesystem::path_traits |
|
|
|
#include <boost/config/abi_suffix.hpp> // pops abi_prefix.hpp pragmas |
|
|
|
#endif // BOOST_FILESYSTEM_PATH_TRAITS_HPP
|
|
|