520 lines
13 KiB
C++
520 lines
13 KiB
C++
/*
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* A ISO C++ FileSystem Implementation
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* Copyright(C) 2003-2015 Jinhao(cnjinhao@hotmail.com)
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*
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* Distributed under the Boost Software License, Version 1.0.
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* (See accompanying file LICENSE_1_0.txt or copy at
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* http://www.boost.org/LICENSE_1_0.txt)
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*
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* @file: nana/filesystem/filesystem.cpp
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* @description:
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* provide some interface for file managment
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*/
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#include <nana/filesystem/filesystem.hpp>
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#include <vector>
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#if defined(NANA_WINDOWS)
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#include <windows.h>
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#if defined(NANA_MINGW)
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#ifndef _WIN32_IE
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#define _WIN32_IE 0x0500
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#endif
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#endif
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#include <shlobj.h>
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#include <nana/datetime.hpp>
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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#include <nana/charset.hpp>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <dirent.h>
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#include <cstdio>
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#include <cstring>
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#include <errno.h>
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#include <unistd.h>
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#include <stdlib.h>
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#endif
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namespace nana {
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namespace experimental
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{
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namespace filesystem
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{
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//Because of No wide character version of POSIX
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#if defined(NANA_LINUX) || defined(NANA_MACOS)
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const char* splstr = "/";
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#else
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const wchar_t* splstr = L"/\\";
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#endif
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//class path
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path::path() {}
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int path::compare(const path& p) const
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{
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return pathstr_.compare(p.pathstr_);
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}
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bool path::empty() const
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{
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#if defined(NANA_WINDOWS)
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return (::GetFileAttributes(pathstr_.c_str()) == INVALID_FILE_ATTRIBUTES);
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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struct stat sta;
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return (::stat(pathstr_.c_str(), &sta) == -1);
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#endif
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}
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path path::extension() const
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{
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#if defined(NANA_WINDOWS)
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auto pos = pathstr_.find_last_of(L"\\/.");
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#else
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auto pos = pathstr_.find_last_of("\\/.");
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#endif
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if ((pos == pathstr_.npos) || (pathstr_[pos] != '.'))
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return path();
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if (pos + 1 == pathstr_.size())
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return path();
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return path(pathstr_.substr(pos));
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}
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path path::parent_path() const
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{
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return{filesystem::parent_path(pathstr_)};
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}
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file_type path::what() const
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{
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#if defined(NANA_WINDOWS)
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unsigned long attr = ::GetFileAttributes(pathstr_.c_str());
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if (INVALID_FILE_ATTRIBUTES == attr)
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return file_type::not_found; //??
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if (FILE_ATTRIBUTE_DIRECTORY & attr)
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return file_type::directory;
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return file_type::regular;
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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struct stat sta;
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if (-1 == ::stat(pathstr_.c_str(), &sta))
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return file_type::not_found; //??
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if ((S_IFDIR & sta.st_mode) == S_IFDIR)
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return file_type::directory;
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if ((S_IFREG & sta.st_mode) == S_IFREG)
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return file_type::regular;
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return file_type::none;
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#endif
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}
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path path::filename() const
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{
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auto pos = pathstr_.find_last_of(splstr);
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if (pos != pathstr_.npos)
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{
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if (pos + 1 == pathstr_.size())
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{
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value_type tmp[2] = {preferred_separator, 0};
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if (pathstr_.npos != pathstr_.find_last_not_of(splstr, pos))
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tmp[0] = '.';
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return{ tmp };
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}
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return{ pathstr_.substr(pos + 1) };
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}
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return{ pathstr_ };
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}
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const path::value_type* path::c_str() const
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{
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return native().c_str();
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}
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const path::string_type& path::native() const
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{
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return pathstr_;
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}
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path::operator string_type() const
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{
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return native();
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}
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void path::_m_assign(const std::string& source_utf8)
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{
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#if defined(NANA_WINDOWS)
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pathstr_ = utf8_cast(source_utf8);
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#else
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pathstr_ = source_utf8;
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#endif
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}
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void path::_m_assign(const std::wstring& source)
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{
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#if defined(NANA_WINDOWS)
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pathstr_ = source;
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#else
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pathstr_ = utf8_cast(source);
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#endif
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}
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//end class path
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bool operator==(const path& lhs, const path& rhs)
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{
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return (lhs.compare(rhs) == 0);
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}
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bool operator!=(const path& lhs, const path& rhs)
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{
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return (lhs.native() != rhs.native());
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}
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bool operator<(const path& lhs, const path& rhs)
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{
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return (lhs.compare(rhs) < 0);
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}
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bool operator>(const path& lhs, const path& rhs)
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{
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return (rhs.compare(lhs) < 0);
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}
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namespace detail
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{
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//rm_dir_recursive
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//@brief: remove a directory, if it is not empty, recursively remove it's subfiles and sub directories
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template<typename CharT>
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bool rm_dir_recursive(const CharT* dir)
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{
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std::vector<directory_iterator::value_type> files;
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std::basic_string<CharT> path = dir;
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path += '\\';
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std::copy(directory_iterator(dir), directory_iterator(), std::back_inserter(files));
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for (auto & f : files)
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{
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auto subpath = path + f.path().filename().native();
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if (f.attr.directory)
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rm_dir_recursive(subpath.c_str());
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else
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rmfile(subpath.c_str());
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}
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return rmdir(dir, true);
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}
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bool mkdir_helper(const nana::string& dir, bool & if_exist)
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{
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#if defined(NANA_WINDOWS)
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if (::CreateDirectory(dir.c_str(), 0))
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{
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if_exist = false;
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return true;
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}
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if_exist = (::GetLastError() == ERROR_ALREADY_EXISTS);
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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if (0 == ::mkdir(static_cast<std::string>(nana::charset(dir)).c_str(), S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH))
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{
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if_exist = false;
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return true;
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}
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if_exist = (errno == EEXIST);
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#endif
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return false;
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}
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#if defined(NANA_WINDOWS)
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void filetime_to_c_tm(FILETIME& ft, struct tm& t)
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{
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FILETIME local_file_time;
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if (::FileTimeToLocalFileTime(&ft, &local_file_time))
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{
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SYSTEMTIME st;
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::FileTimeToSystemTime(&local_file_time, &st);
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t.tm_year = st.wYear - 1900;
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t.tm_mon = st.wMonth - 1;
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t.tm_mday = st.wDay;
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t.tm_wday = st.wDayOfWeek - 1;
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t.tm_yday = nana::date::day_in_year(st.wYear, st.wMonth, st.wDay);
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t.tm_hour = st.wHour;
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t.tm_min = st.wMinute;
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t.tm_sec = st.wSecond;
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}
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}
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#endif
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}//end namespace detail
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bool file_attrib(const nana::string& file, attribute& attr)
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{
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#if defined(NANA_WINDOWS)
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WIN32_FILE_ATTRIBUTE_DATA fad;
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if (::GetFileAttributesEx(file.c_str(), GetFileExInfoStandard, &fad))
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{
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LARGE_INTEGER li;
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li.u.LowPart = fad.nFileSizeLow;
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li.u.HighPart = fad.nFileSizeHigh;
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attr.size = li.QuadPart;
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attr.directory = (0 != (fad.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY));
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detail::filetime_to_c_tm(fad.ftLastWriteTime, attr.modified);
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return true;
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}
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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struct stat fst;
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if (0 == ::stat(static_cast<std::string>(nana::charset(file)).c_str(), &fst))
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{
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attr.size = fst.st_size;
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attr.directory = (0 != (040000 & fst.st_mode));
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attr.modified = *(::localtime(&fst.st_ctime));
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return true;
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}
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#endif
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return false;
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}
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uintmax_t file_size(const nana::string& file)
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{
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#if defined(NANA_WINDOWS)
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//Some compilation environment may fail to link to GetFileSizeEx
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typedef BOOL(__stdcall *GetFileSizeEx_fptr_t)(HANDLE, PLARGE_INTEGER);
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GetFileSizeEx_fptr_t get_file_size_ex = reinterpret_cast<GetFileSizeEx_fptr_t>(::GetProcAddress(::GetModuleHandleA("Kernel32.DLL"), "GetFileSizeEx"));
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if (get_file_size_ex)
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{
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HANDLE handle = ::CreateFile(file.c_str(), GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
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if (INVALID_HANDLE_VALUE != handle)
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{
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LARGE_INTEGER li;
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if (!get_file_size_ex(handle, &li))
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li.QuadPart = 0;
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::CloseHandle(handle);
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return li.QuadPart;
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}
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}
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return 0;
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#elif defined(NANA_LINUX)
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FILE * stream = ::fopen(static_cast<std::string>(nana::charset(file)).c_str(), "rb");
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long long size = 0;
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if (stream)
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{
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fseeko64(stream, 0, SEEK_END);
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size = ftello64(stream);
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fclose(stream);
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}
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return size;
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#elif defined(NANA_MACOS)
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FILE * stream = ::fopen(static_cast<std::string>(nana::charset(file)).c_str(), "rb");
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long long size = 0;
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if (stream)
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{
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fseeko(stream, 0, SEEK_END);
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size = ftello(stream);
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fclose(stream);
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}
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return size;
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#endif
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}
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bool modified_file_time(const nana::string& file, struct tm& t)
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{
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#if defined(NANA_WINDOWS)
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WIN32_FILE_ATTRIBUTE_DATA attr;
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if (::GetFileAttributesEx(file.c_str(), GetFileExInfoStandard, &attr))
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{
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FILETIME local_file_time;
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if (::FileTimeToLocalFileTime(&attr.ftLastWriteTime, &local_file_time))
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{
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SYSTEMTIME st;
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::FileTimeToSystemTime(&local_file_time, &st);
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t.tm_year = st.wYear - 1900;
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t.tm_mon = st.wMonth - 1;
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t.tm_mday = st.wDay;
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t.tm_wday = st.wDayOfWeek - 1;
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t.tm_yday = nana::date::day_in_year(st.wYear, st.wMonth, st.wDay);
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t.tm_hour = st.wHour;
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t.tm_min = st.wMinute;
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t.tm_sec = st.wSecond;
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return true;
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}
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}
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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struct stat attr;
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if (0 == ::stat(static_cast<std::string>(nana::charset(file)).c_str(), &attr))
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{
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t = *(::localtime(&attr.st_ctime));
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return true;
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}
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#endif
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return false;
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}
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bool create_directory(const nana::string& path, bool & if_exist)
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{
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if_exist = false;
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if (path.size() == 0) return false;
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nana::string root;
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#if defined(NANA_WINDOWS)
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if (path.size() > 3 && path[1] == L':')
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root = path.substr(0, 3);
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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if (path[0] == STR('/'))
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root = '/';
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#endif
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bool mkstat = false;
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std::size_t beg = root.size();
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while (true)
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{
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beg = path.find_first_not_of(L"/\\", beg);
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if (beg == path.npos)
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break;
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std::size_t pos = path.find_first_of(L"/\\", beg + 1);
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if (pos != path.npos)
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{
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root += path.substr(beg, pos - beg);
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mkstat = detail::mkdir_helper(root, if_exist);
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if (mkstat == false && if_exist == false)
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return false;
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#if defined(NANA_WINDOWS)
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root += L'\\';
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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root += L'/';
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#endif
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}
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else
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{
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if (beg + 1 < path.size())
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{
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root += path.substr(beg);
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mkstat = detail::mkdir_helper(root, if_exist);
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}
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break;
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}
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beg = pos + 1;
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}
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return mkstat;
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}
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bool rmfile(const nana::char_t* file)
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{
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#if defined(NANA_WINDOWS)
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bool ret = false;
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if (file)
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{
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ret = (::DeleteFile(file) == TRUE);
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if (!ret)
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ret = (ERROR_FILE_NOT_FOUND == ::GetLastError());
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}
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return ret;
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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if (std::remove(static_cast<std::string>(nana::charset(file)).c_str()))
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return (errno == ENOENT);
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return true;
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#endif
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}
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bool rmdir(const char* dir_utf8, bool fails_if_not_empty)
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{
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bool ret = false;
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if (dir_utf8)
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{
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#if defined(NANA_WINDOWS)
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auto dir = utf8_cast(dir_utf8);
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ret = (::RemoveDirectory(dir.c_str()) == TRUE);
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if (!fails_if_not_empty && (::GetLastError() == ERROR_DIR_NOT_EMPTY))
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ret = detail::rm_dir_recursive(dir.c_str());
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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if (::rmdir(dir_utf8))
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{
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if (!fails_if_not_empty && (errno == EEXIST || errno == ENOTEMPTY))
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ret = detail::rm_dir_recursive(dir);
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}
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else
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ret = true;
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#endif
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}
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return ret;
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}
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bool rmdir(const wchar_t* dir, bool fails_if_not_empty)
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{
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bool ret = false;
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if (dir)
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{
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#if defined(NANA_WINDOWS)
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ret = (::RemoveDirectory(dir) == TRUE);
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if (!fails_if_not_empty && (::GetLastError() == ERROR_DIR_NOT_EMPTY))
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ret = detail::rm_dir_recursive(dir);
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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if (::rmdir(utf8_cast(dir).c_str()))
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{
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if (!fails_if_not_empty && (errno == EEXIST || errno == ENOTEMPTY))
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ret = detail::rm_dir_recursive(dir);
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}
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else
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ret = true;
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#endif
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}
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return ret;
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}
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nana::string path_user()
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{
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#if defined(NANA_WINDOWS)
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nana::char_t path[MAX_PATH];
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if (SUCCEEDED(SHGetFolderPath(0, CSIDL_PROFILE, 0, SHGFP_TYPE_CURRENT, path)))
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return path;
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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const char * s = ::getenv("HOME");
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if (s)
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return nana::charset(std::string(s, std::strlen(s)), nana::unicode::utf8);
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#endif
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return nana::string();
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}
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path current_path()
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{
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#if defined(NANA_WINDOWS)
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nana::char_t buf[MAX_PATH];
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DWORD len = ::GetCurrentDirectory(MAX_PATH, buf);
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if (len)
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{
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if (len > MAX_PATH)
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{
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nana::char_t * p = new nana::char_t[len + 1];
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::GetCurrentDirectory(len + 1, p);
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nana::string s = p;
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delete[] p;
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return s;
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}
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return nana::string(buf);
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}
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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const char * s = ::getenv("PWD");
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if (s)
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return static_cast<nana::string>(nana::charset(std::string(s, std::strlen(s)), nana::unicode::utf8));
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#endif
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return nana::string();
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}
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}//end namespace filesystem
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} //end namespace experimental
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}//end namespace nana
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