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Diffstat (limited to '3rdParty/Boost/src/libs/filesystem/v3/src/path.cpp')
| -rw-r--r-- | 3rdParty/Boost/src/libs/filesystem/v3/src/path.cpp | 807 |
1 files changed, 807 insertions, 0 deletions
diff --git a/3rdParty/Boost/src/libs/filesystem/v3/src/path.cpp b/3rdParty/Boost/src/libs/filesystem/v3/src/path.cpp new file mode 100644 index 0000000..53a4cc6 --- /dev/null +++ b/3rdParty/Boost/src/libs/filesystem/v3/src/path.cpp @@ -0,0 +1,807 @@ +// filesystem path.cpp ------------------------------------------------------------- // + +// Copyright Beman Dawes 2008 + +// 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 + +#include <boost/config.hpp> +#if !defined( BOOST_NO_STD_WSTRING ) +// Boost.Filesystem V3 and later requires std::wstring support. +// During the transition to V3, libraries are compiled with both V2 and V3 sources. +// On old compilers that don't support V3 anyhow, we just skip everything so the compile +// will succeed and the library can be built. + +// define BOOST_FILESYSTEM_SOURCE so that <boost/system/config.hpp> knows +// the library is being built (possibly exporting rather than importing code) +#define BOOST_FILESYSTEM_SOURCE + +#ifndef BOOST_SYSTEM_NO_DEPRECATED +# define BOOST_SYSTEM_NO_DEPRECATED +#endif + +#include <boost/filesystem/v3/config.hpp> +#include <boost/filesystem/v3/path.hpp> +#include <boost/scoped_array.hpp> +#include <boost/system/error_code.hpp> +#include <boost/assert.hpp> +#include <cstddef> +#include <cstring> +#include <cassert> + +#ifdef BOOST_WINDOWS_API +# include "windows_file_codecvt.hpp" +# include <windows.h> +#elif defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__) +# include <boost/filesystem/detail/utf8_codecvt_facet.hpp> +#endif + +#ifdef BOOST_FILESYSTEM_DEBUG +# include <iostream> +# include <iomanip> +#endif + +namespace fs = boost::filesystem3; + +using boost::filesystem3::path; + +using std::string; +using std::wstring; + +using boost::system::error_code; + +#ifndef BOOST_FILESYSTEM_CODECVT_BUF_SIZE +# define BOOST_FILESYSTEM_CODECVT_BUF_SIZE 256 +#endif + +//--------------------------------------------------------------------------------------// +// // +// class path helpers // +// // +//--------------------------------------------------------------------------------------// + +namespace +{ + //------------------------------------------------------------------------------------// + // miscellaneous class path helpers // + //------------------------------------------------------------------------------------// + + typedef path::value_type value_type; + typedef path::string_type string_type; + typedef string_type::size_type size_type; + + const std::size_t default_codecvt_buf_size = BOOST_FILESYSTEM_CODECVT_BUF_SIZE; + +# ifdef BOOST_WINDOWS_API + + const wchar_t separator = L'/'; + const wchar_t preferred_separator = L'\\'; + const wchar_t* const separators = L"/\\"; + const wchar_t* separator_string = L"/"; + const wchar_t* preferred_separator_string = L"\\"; + const wchar_t colon = L':'; + const wchar_t dot = L'.'; + const fs::path dot_path(L"."); + const fs::path dot_dot_path(L".."); + +# else + + const char separator = '/'; + const char preferred_separator = '/'; + const char* const separators = "/"; + const char* separator_string = "/"; + const char* preferred_separator_string = "/"; + const char colon = ':'; + const char dot = '.'; + const fs::path dot_path("."); + const fs::path dot_dot_path(".."); + +# endif + + inline bool is_separator(fs::path::value_type c) + { + return c == separator +# ifdef BOOST_WINDOWS_API + || c == preferred_separator +# endif + ; + } + + bool is_non_root_separator(const string_type& str, size_type pos); + // pos is position of the separator + + size_type filename_pos(const string_type& str, + size_type end_pos); // end_pos is past-the-end position + // Returns: 0 if str itself is filename (or empty) + + size_type root_directory_start(const string_type& path, size_type size); + // Returns: npos if no root_directory found + + void first_element( + const string_type& src, + size_type& element_pos, + size_type& element_size, +# if !BOOST_WORKAROUND(BOOST_MSVC, <= 1310) // VC++ 7.1 + size_type size = string_type::npos +# else + size_type size = -1 +# endif + ); + +} // unnamed namespace + +//--------------------------------------------------------------------------------------// +// // +// class path implementation // +// // +//--------------------------------------------------------------------------------------// + +namespace boost +{ +namespace filesystem3 +{ + + path & path::operator/=(const path & p) + { + if (p.empty()) + return *this; + if (!is_separator(*p.m_pathname.begin())) + m_append_separator_if_needed(); + m_pathname += p.m_pathname; + return *this; + } + +# ifdef BOOST_WINDOWS_API + + void path::m_portable() + { + for (string_type::iterator it = m_pathname.begin(); + it != m_pathname.end(); ++it) + { + if (*it == L'\\') + *it = L'/'; + } + } + + const std::string path::generic_string(const codecvt_type& cvt) const + { + path tmp(*this); + tmp.m_portable(); + return tmp.string(cvt); + } + + const std::wstring path::generic_wstring() const + { + path tmp(*this); + tmp.m_portable(); + return tmp.wstring(); + } + +# endif // BOOST_WINDOWS_API + + // m_append_separator_if_needed ----------------------------------------------------// + + path::string_type::size_type path::m_append_separator_if_needed() + { + if (!m_pathname.empty() && +# ifdef BOOST_WINDOWS_API + *(m_pathname.end()-1) != colon && +# endif + !is_separator(*(m_pathname.end()-1))) + { + string_type::size_type tmp(m_pathname.size()); + m_pathname += preferred_separator; + return tmp; + } + return 0; + } + + // m_erase_redundant_separator -----------------------------------------------------// + + void path::m_erase_redundant_separator(string_type::size_type sep_pos) + { + if (sep_pos // a separator was added + && sep_pos < m_pathname.size() // and something was appended + && (m_pathname[sep_pos+1] == separator // and it was also separator +# ifdef BOOST_WINDOWS_API + || m_pathname[sep_pos+1] == preferred_separator // or preferred_separator +# endif +)) { m_pathname.erase(sep_pos, 1); } // erase the added separator + } + + // modifiers -----------------------------------------------------------------------// + +# ifdef BOOST_WINDOWS_API + path & path::make_preferred() + { + for (string_type::iterator it = m_pathname.begin(); + it != m_pathname.end(); ++it) + { + if (*it == L'/') + *it = L'\\'; + } + return *this; + } +# endif + + path& path::remove_filename() + { + m_pathname.erase(m_parent_path_end()); + return *this; + } + + path & path::replace_extension(const path & source) + { + // erase existing extension if any + size_type pos(m_pathname.rfind(dot)); + if (pos != string_type::npos && pos >= filename_pos(m_pathname, m_pathname.size())) + m_pathname.erase(pos); + + // append source extension if any + pos = source.m_pathname.rfind(dot); + if (pos != string_type::npos) + m_pathname += source.c_str() + pos; + + return *this; + } + + // decomposition -------------------------------------------------------------------// + + path path::root_path() const + { + path temp(root_name()); + if (!root_directory().empty()) temp.m_pathname += root_directory().c_str(); + return temp; + } + + path path::root_name() const + { + iterator itr(begin()); + + return (itr.m_pos != m_pathname.size() + && ( + (itr.m_element.m_pathname.size() > 1 + && is_separator(itr.m_element.m_pathname[0]) + && is_separator(itr.m_element.m_pathname[1]) + ) +# ifdef BOOST_WINDOWS_API + || itr.m_element.m_pathname[itr.m_element.m_pathname.size()-1] == colon +# endif + )) + ? itr.m_element + : path(); + } + + path path::root_directory() const + { + size_type pos(root_directory_start(m_pathname, m_pathname.size())); + + return pos == string_type::npos + ? path() + : path(m_pathname.c_str() + pos, m_pathname.c_str() + pos + 1); + } + + path path::relative_path() const + { + iterator itr(begin()); + + for (; itr.m_pos != m_pathname.size() + && (is_separator(itr.m_element.m_pathname[0]) +# ifdef BOOST_WINDOWS_API + || itr.m_element.m_pathname[itr.m_element.m_pathname.size()-1] == colon +# endif + ); ++itr) {} + + return path(m_pathname.c_str() + itr.m_pos); + } + + string_type::size_type path::m_parent_path_end() const + { + size_type end_pos(filename_pos(m_pathname, m_pathname.size())); + + bool filename_was_separator(m_pathname.size() + && is_separator(m_pathname[end_pos])); + + // skip separators unless root directory + size_type root_dir_pos(root_directory_start(m_pathname, end_pos)); + for (; + end_pos > 0 + && (end_pos-1) != root_dir_pos + && is_separator(m_pathname[end_pos-1]) + ; + --end_pos) {} + + return (end_pos == 1 && root_dir_pos == 0 && filename_was_separator) + ? string_type::npos + : end_pos; + } + + path path::parent_path() const + { + size_type end_pos(m_parent_path_end()); + return end_pos == string_type::npos + ? path() + : path(m_pathname.c_str(), m_pathname.c_str() + end_pos); + } + + path path::filename() const + { + size_type pos(filename_pos(m_pathname, m_pathname.size())); + return (m_pathname.size() + && pos + && is_separator(m_pathname[pos]) + && is_non_root_separator(m_pathname, pos)) + ? dot_path + : path(m_pathname.c_str() + pos); + } + + path path::stem() const + { + path name(filename()); + if (name == dot_path || name == dot_dot_path) return name; + size_type pos(name.m_pathname.rfind(dot)); + return pos == string_type::npos + ? name + : path(name.m_pathname.c_str(), name.m_pathname.c_str() + pos); + } + + path path::extension() const + { + path name(filename()); + if (name == dot_path || name == dot_dot_path) return path(); + size_type pos(name.m_pathname.rfind(dot)); + return pos == string_type::npos + ? path() + : path(name.m_pathname.c_str() + pos); + } + + // m_normalize ----------------------------------------------------------------------// + + path& path::m_normalize() + { + if (m_pathname.empty()) return *this; + + path temp; + iterator start(begin()); + iterator last(end()); + iterator stop(last--); + for (iterator itr(start); itr != stop; ++itr) + { + // ignore "." except at start and last + if (itr->native().size() == 1 + && (itr->native())[0] == dot + && itr != start + && itr != last) continue; + + // ignore a name and following ".." + if (!temp.empty() + && itr->native().size() == 2 + && (itr->native())[0] == dot + && (itr->native())[1] == dot) // dot dot + { + string_type lf(temp.filename().native()); + if (lf.size() > 0 + && (lf.size() != 1 + || (lf[0] != dot + && lf[0] != separator)) + && (lf.size() != 2 + || (lf[0] != dot + && lf[1] != dot +# ifdef BOOST_WINDOWS_API + && lf[1] != colon +# endif + ) + ) + ) + { + temp.remove_filename(); + // if not root directory, must also remove "/" if any + if (temp.m_pathname.size() > 0 + && temp.m_pathname[temp.m_pathname.size()-1] + == separator) + { + string_type::size_type rds( + root_directory_start(temp.m_pathname, temp.m_pathname.size())); + if (rds == string_type::npos + || rds != temp.m_pathname.size()-1) + { temp.m_pathname.erase(temp.m_pathname.size()-1); } + } + + iterator next(itr); + if (temp.empty() && ++next != stop + && next == last && *last == dot_path) temp /= dot_path; + continue; + } + } + + temp /= *itr; + }; + + if (temp.empty()) temp /= dot_path; + m_pathname = temp.m_pathname; + return *this; + } + +} // namespace filesystem3 +} // namespace boost + +//--------------------------------------------------------------------------------------// +// // +// class path helpers implementation // +// // +//--------------------------------------------------------------------------------------// + +namespace +{ + + // is_non_root_separator -------------------------------------------------// + + bool is_non_root_separator(const string_type & str, size_type pos) + // pos is position of the separator + { + BOOST_ASSERT(!str.empty() && is_separator(str[pos]) + && "precondition violation"); + + // subsequent logic expects pos to be for leftmost slash of a set + while (pos > 0 && is_separator(str[pos-1])) + --pos; + + return pos != 0 + && (pos <= 2 || !is_separator(str[1]) + || str.find_first_of(separators, 2) != pos) +# ifdef BOOST_WINDOWS_API + && (pos !=2 || str[1] != colon) +# endif + ; + } + + // filename_pos --------------------------------------------------------------------// + + size_type filename_pos(const string_type & str, + size_type end_pos) // end_pos is past-the-end position + // return 0 if str itself is filename (or empty) + { + // case: "//" + if (end_pos == 2 + && is_separator(str[0]) + && is_separator(str[1])) return 0; + + // case: ends in "/" + if (end_pos && is_separator(str[end_pos-1])) + return end_pos-1; + + // set pos to start of last element + size_type pos(str.find_last_of(separators, end_pos-1)); + +# ifdef BOOST_WINDOWS_API + if (pos == string_type::npos) + pos = str.find_last_of(colon, end_pos-2); +# endif + + return (pos == string_type::npos // path itself must be a filename (or empty) + || (pos == 1 && is_separator(str[0]))) // or net + ? 0 // so filename is entire string + : pos + 1; // or starts after delimiter + } + + // root_directory_start ------------------------------------------------------------// + + size_type root_directory_start(const string_type & path, size_type size) + // return npos if no root_directory found + { + +# ifdef BOOST_WINDOWS_API + // case "c:/" + if (size > 2 + && path[1] == colon + && is_separator(path[2])) return 2; +# endif + + // case "//" + if (size == 2 + && is_separator(path[0]) + && is_separator(path[1])) return string_type::npos; + + // case "//net {/}" + if (size > 3 + && is_separator(path[0]) + && is_separator(path[1]) + && !is_separator(path[2])) + { + string_type::size_type pos(path.find_first_of(separators, 2)); + return pos < size ? pos : string_type::npos; + } + + // case "/" + if (size > 0 && is_separator(path[0])) return 0; + + return string_type::npos; + } + + // first_element --------------------------------------------------------------------// + // sets pos and len of first element, excluding extra separators + // if src.empty(), sets pos,len, to 0,0. + + void first_element( + const string_type & src, + size_type & element_pos, + size_type & element_size, + size_type size +) + { + if (size == string_type::npos) size = src.size(); + element_pos = 0; + element_size = 0; + if (src.empty()) return; + + string_type::size_type cur(0); + + // deal with // [network] + if (size >= 2 && is_separator(src[0]) + && is_separator(src[1]) + && (size == 2 + || !is_separator(src[2]))) + { + cur += 2; + element_size += 2; + } + + // leading (not non-network) separator + else if (is_separator(src[0])) + { + ++element_size; + // bypass extra leading separators + while (cur+1 < size + && is_separator(src[cur+1])) + { + ++cur; + ++element_pos; + } + return; + } + + // at this point, we have either a plain name, a network name, + // or (on Windows only) a device name + + // find the end + while (cur < size +# ifdef BOOST_WINDOWS_API + && src[cur] != colon +# endif + && !is_separator(src[cur])) + { + ++cur; + ++element_size; + } + +# ifdef BOOST_WINDOWS_API + if (cur == size) return; + // include device delimiter + if (src[cur] == colon) + { ++element_size; } +# endif + + return; + } + +} // unnammed namespace + +//--------------------------------------------------------------------------------------// +// // +// class path::iterator implementation // +// // +//--------------------------------------------------------------------------------------// + +namespace boost +{ +namespace filesystem3 +{ + + path::iterator path::begin() const + { + iterator itr; + itr.m_path_ptr = this; + size_type element_size; + first_element(m_pathname, itr.m_pos, element_size); + itr.m_element = m_pathname.substr(itr.m_pos, element_size); + if (itr.m_element.m_pathname == preferred_separator_string) + itr.m_element.m_pathname = separator_string; // needed for Windows, harmless on POSIX + return itr; + } + + path::iterator path::end() const + { + iterator itr; + itr.m_path_ptr = this; + itr.m_pos = m_pathname.size(); + return itr; + } + + void path::m_path_iterator_increment(path::iterator & it) + { + BOOST_ASSERT(it.m_pos < it.m_path_ptr->m_pathname.size() && "path::basic_iterator increment past end()"); + + // increment to position past current element + it.m_pos += it.m_element.m_pathname.size(); + + // if end reached, create end basic_iterator + if (it.m_pos == it.m_path_ptr->m_pathname.size()) + { + it.m_element.clear(); + return; + } + + // both POSIX and Windows treat paths that begin with exactly two separators specially + bool was_net(it.m_element.m_pathname.size() > 2 + && is_separator(it.m_element.m_pathname[0]) + && is_separator(it.m_element.m_pathname[1]) + && !is_separator(it.m_element.m_pathname[2])); + + // process separator (Windows drive spec is only case not a separator) + if (is_separator(it.m_path_ptr->m_pathname[it.m_pos])) + { + // detect root directory + if (was_net +# ifdef BOOST_WINDOWS_API + // case "c:/" + || it.m_element.m_pathname[it.m_element.m_pathname.size()-1] == colon +# endif + ) + { + it.m_element.m_pathname = separator; + return; + } + + // bypass separators + while (it.m_pos != it.m_path_ptr->m_pathname.size() + && is_separator(it.m_path_ptr->m_pathname[it.m_pos])) + { ++it.m_pos; } + + // detect trailing separator, and treat it as ".", per POSIX spec + if (it.m_pos == it.m_path_ptr->m_pathname.size() + && is_non_root_separator(it.m_path_ptr->m_pathname, it.m_pos-1)) + { + --it.m_pos; + it.m_element = dot_path; + return; + } + } + + // get next element + size_type end_pos(it.m_path_ptr->m_pathname.find_first_of(separators, it.m_pos)); + if (end_pos == string_type::npos) end_pos = it.m_path_ptr->m_pathname.size(); + it.m_element = it.m_path_ptr->m_pathname.substr(it.m_pos, end_pos - it.m_pos); + } + + void path::m_path_iterator_decrement(path::iterator & it) + { + BOOST_ASSERT(it.m_pos && "path::iterator decrement past begin()"); + + size_type end_pos(it.m_pos); + + // if at end and there was a trailing non-root '/', return "." + if (it.m_pos == it.m_path_ptr->m_pathname.size() + && it.m_path_ptr->m_pathname.size() > 1 + && is_separator(it.m_path_ptr->m_pathname[it.m_pos-1]) + && is_non_root_separator(it.m_path_ptr->m_pathname, it.m_pos-1) + ) + { + --it.m_pos; + it.m_element = dot_path; + return; + } + + size_type root_dir_pos(root_directory_start(it.m_path_ptr->m_pathname, end_pos)); + + // skip separators unless root directory + for ( + ; + end_pos > 0 + && (end_pos-1) != root_dir_pos + && is_separator(it.m_path_ptr->m_pathname[end_pos-1]) + ; + --end_pos) {} + + it.m_pos = filename_pos(it.m_path_ptr->m_pathname, end_pos); + it.m_element = it.m_path_ptr->m_pathname.substr(it.m_pos, end_pos - it.m_pos); + if (it.m_element.m_pathname == preferred_separator_string) + it.m_element.m_pathname = separator_string; // needed for Windows, harmless on POSIX + } + +} // namespace filesystem3 +} // namespace boost + +//--------------------------------------------------------------------------------------// +// // +// detail helpers // +// // +//--------------------------------------------------------------------------------------// + +namespace +{ + + //------------------------------------------------------------------------------------// + // locale helpers // + //------------------------------------------------------------------------------------// + + // std::locale construction can throw (if LC_MESSAGES is wrong, for example), + // so a static at function scope is used to ensure that exceptions can be + // caught. (A previous version was at namespace scope, so initialization + // occurred before main(), preventing exceptions from being caught.) + + std::locale default_locale() + { +# ifdef BOOST_WINDOWS_API + std::locale global_loc = std::locale(); + std::locale loc(global_loc, new windows_file_codecvt); + return loc; + +# elif defined(macintosh) || defined(__APPLE__) || defined(__APPLE_CC__) + // "All BSD system functions expect their string parameters to be in UTF-8 encoding + // and nothing else." http://developer.apple.com/mac/library/documentation/MacOSX/Conceptual/BPInternational/Articles/FileEncodings.html + // + // "The kernel will reject any filename that is not a valid UTF-8 string, and it will + // even be normalized (to Unicode NFD) before stored on disk, at least when using HFS. + // The right way to deal with it would be to always convert the filename to UTF-8 + // before trying to open/create a file." http://lists.apple.com/archives/unix-porting/2007/Sep/msg00023.html + // + // "How a file name looks at the API level depends on the API. Current Carbon APIs + // handle file names as an array of UTF-16 characters; POSIX ones handle them as an + // array of UTF-8, which is why UTF-8 works well in Terminal. How it's stored on disk + // depends on the disk format; HFS+ uses UTF-16, but that's not important in most + // cases." http://lists.apple.com/archives/applescript-users/2002/Sep/msg00319.html + // + // Many thanks to Peter Dimov for digging out the above references! + std::locale global_loc = std::locale(); + std::locale loc(global_loc, new boost::filesystem::detail::utf8_codecvt_facet); + return loc; + +# else + // ISO C calls this "the locale-specific native environment": + return std::locale(""); + +# endif + } + + std::locale & path_locale() + { + static std::locale loc(default_locale()); + return loc; + } + +} // unnamed namespace + +//--------------------------------------------------------------------------------------// +// path::imbue implementation // +//--------------------------------------------------------------------------------------// + +namespace boost +{ +namespace filesystem3 +{ + + const path::codecvt_type *& + path::wchar_t_codecvt_facet() + { + static const std::codecvt<wchar_t, char, std::mbstate_t> * + facet( + &std::use_facet<std::codecvt<wchar_t, char, std::mbstate_t> > + (path_locale())); + return facet; + } + + std::locale path::imbue(const std::locale & loc) + { + std::locale temp(path_locale()); + path_locale() = loc; + wchar_t_codecvt_facet() = &std::use_facet + <std::codecvt<wchar_t, char, std::mbstate_t> >(path_locale()); + return temp; + } + +} // namespace filesystem3 +} // namespace boost + +#endif // no wide character support |