890 lines
20 KiB
C++
890 lines
20 KiB
C++
/*
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* A ISO C++ FileSystem Implementation
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* Copyright(C) 2003-2016 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_POSIX)
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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 { namespace experimental { namespace filesystem
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{
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#ifndef CXX_NO_INLINE_NAMESPACE
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inline namespace v1 {
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#endif
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//class filesystem_error
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filesystem_error::filesystem_error(const std::string& msg, std::error_code err)
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: std::system_error(err, msg)
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{}
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filesystem_error::filesystem_error(const std::string& msg, const path& path1, std::error_code err)
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: std::system_error(err, msg),
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path1_(path1)
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{}
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filesystem_error::filesystem_error(const std::string& msg, const path& path1, const path& path2, std::error_code err)
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: std::system_error(err, msg),
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path1_(path1),
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path2_(path2)
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{}
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const path& filesystem_error::path1() const noexcept
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{
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return path1_;
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}
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const path& filesystem_error::path2() const noexcept
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{
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return path2_;
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}
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//end class filesystem_error
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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 file_status
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file_status::file_status(file_type ft, perms prms)
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: value_{ft}, perms_{prms}
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{}
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file_type file_status::type() const
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{
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return value_;
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}
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void file_status::type(file_type ft)
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{
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value_ = ft;
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}
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perms file_status::permissions() const
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{
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return perms_;
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}
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void file_status::permissions(perms prms)
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{
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perms_ = prms;
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}
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//end filestatus
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//class 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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/// true if the path is empty, false otherwise. ??
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bool path::empty() const noexcept
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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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// todo: make more globlal
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#if defined(NANA_WINDOWS)
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auto SLorP=L"\\/.";
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auto P=L'.';
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#else
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auto SLorP="\\/.";
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auto P='.';
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#endif
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auto pos = pathstr_.find_last_of(SLorP);
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if ( ( pos == pathstr_.npos)
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|| ( pathstr_[pos] != P )
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|| ( 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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path& path::remove_filename()
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{
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#ifdef NANA_WINDOWS
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wchar_t seps[] = L"/\\";
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#else
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char seps[] = "/\\";
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#endif
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auto pos = pathstr_.find_last_of(seps);
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if (pos != pathstr_.npos)
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{
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pos = pathstr_.find_last_not_of(seps, pos);
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if (pos != pathstr_.npos)
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{
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#ifdef NANA_WINDOWS
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if (pathstr_[pos] == L':')
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{
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pathstr_.erase(pos + 1);
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pathstr_ += L'\\';
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return *this;
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}
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#endif
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++pos;
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}
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else
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pos = 0;
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}
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else
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pos = 0;
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pathstr_.erase(pos);
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return *this;
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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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std::string path::string() const
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{
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return to_osmbstr(to_utf8(pathstr_));
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}
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std::wstring path::wstring() const
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{
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return to_wstring(pathstr_);
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}
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std::string path::u8string() const
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{
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return to_utf8(pathstr_);
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}
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std::string path::generic_string() const
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{
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auto str = string();
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std::replace(str.begin(), str.end(), '\\', '/');
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return str;
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}
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std::wstring path::generic_wstring() const
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{
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auto str = wstring();
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std::replace(str.begin(), str.end(), L'\\', L'/');
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return str;
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}
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std::string path::generic_u8string() const // uppss ...
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{
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auto str = pathstr_;
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std::replace(str.begin(), str.end(), '\\', '/'); // uppss ... revise this !!!!!
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return to_utf8(str);
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}
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path & path::operator/=(const path& p)
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{
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if (p.empty())
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return *this;
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if (this == &p)
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{
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auto other = p.pathstr_;
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if ((other.front() != '/') && (other.front() == path::preferred_separator))
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{
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if (!this->pathstr_.empty() && (pathstr_.back() != '/' && pathstr_.back() == path::preferred_separator))
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pathstr_.append(path::preferred_separator, 1);
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}
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pathstr_ += other;
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}
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else
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{
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auto & other = p.pathstr_;
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if ((other.front() != '/') && (other.front() == path::preferred_separator))
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{
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if (!this->pathstr_.empty() && (pathstr_.back() != '/' && pathstr_.back() == path::preferred_separator))
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pathstr_.append(path::preferred_separator, 1);
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}
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pathstr_ += p.pathstr_;
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}
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return *this;
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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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pathstr_ = to_nstring(source_utf8);
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}
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void path::_m_assign(const std::wstring& source)
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{
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pathstr_ = to_nstring(source);
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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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path operator/(const path& lhs, const path& rhs)
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{
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auto path = lhs;
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return (path /= rhs);
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}
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//class directory_entry
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directory_entry::directory_entry(const filesystem::path& p)
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:path_{ p }
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{}
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//modifiers
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void directory_entry::assign(const filesystem::path& p)
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{
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path_ = p;
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}
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void directory_entry::replace_filename(const filesystem::path& p)
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{
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path_ = path_.parent_path() / p;
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}
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//observers
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file_status directory_entry::status() const
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{
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return filesystem::status(path_);
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}
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directory_entry::operator const filesystem::path&() const
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{
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return path_;
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}
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const path& directory_entry::path() const
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{
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return path_;
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}
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//end class directory_entry
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//class directory_iterator
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struct inner_handle_deleter
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{
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void operator()(void** handle)
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{
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#if defined(NANA_WINDOWS)
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::FindClose(*handle);
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#elif defined(NANA_LINUX) || defined(NANA_MACOS)
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::closedir(*reinterpret_cast<DIR**>(handle));
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#endif
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}
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};
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directory_iterator::directory_iterator() noexcept
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: end_(true),
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handle_(nullptr)
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{}
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directory_iterator::directory_iterator(const path& file_path)
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{
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_m_prepare(file_path);
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}
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const directory_iterator::value_type& directory_iterator::operator*() const { return value_; }
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const directory_iterator::value_type*
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directory_iterator::operator->() const { return &(operator*()); }
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directory_iterator& directory_iterator::operator++()
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{
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_m_read(); return *this;
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}
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directory_iterator directory_iterator::operator++(int)
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{
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directory_iterator tmp = *this;
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_m_read();
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return tmp;
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}
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bool directory_iterator::equal(const directory_iterator& x) const
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{
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if (end_ && (end_ == x.end_)) return true;
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return (value_.path().filename() == x.value_.path().filename());
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}
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void directory_iterator::_m_prepare(const path& file_path)
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{
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path_ = file_path.native();
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#if defined(NANA_WINDOWS)
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if (!path_.empty() && (path_.back() != L'/' && path_.back() != L'\\'))
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path_ += L'\\';
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auto pat = path_;
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DWORD attr = ::GetFileAttributes(pat.data());
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if ((attr != INVALID_FILE_ATTRIBUTES) && (attr & FILE_ATTRIBUTE_DIRECTORY))
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pat += L"*";
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WIN32_FIND_DATAW wfd;
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::HANDLE handle = ::FindFirstFile(pat.data(), &wfd);
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if (handle == INVALID_HANDLE_VALUE)
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{
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end_ = true;
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return;
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}
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while (_m_ignore(wfd.cFileName))
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{
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if (::FindNextFile(handle, &wfd) == 0)
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{
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end_ = true;
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::FindClose(handle);
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return;
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}
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}
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value_ = value_type(path(path_ + wfd.cFileName));
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#elif defined(NANA_POSIX)
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if (path_.size() && (path_.back() != '/'))
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path_ += '/';
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auto handle = opendir(path_.c_str());
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end_ = true;
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if (handle)
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{
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struct dirent * dnt = readdir(handle);
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if (dnt)
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{
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while (_m_ignore(dnt->d_name))
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{
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dnt = readdir(handle);
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if (dnt == 0)
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{
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closedir(handle);
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return;
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}
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}
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value_ = value_type(path_ + dnt->d_name);
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end_ = false;
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}
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}
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#endif
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if (false == end_)
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{
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find_ptr_ = std::shared_ptr<find_handle>(new find_handle(handle), inner_handle_deleter());
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handle_ = handle;
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}
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}
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void directory_iterator::_m_read()
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{
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if (handle_)
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{
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#if defined(NANA_WINDOWS)
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WIN32_FIND_DATAW wfd;
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if (::FindNextFile(handle_, &wfd) != 0)
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{
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while (_m_ignore(wfd.cFileName))
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{
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if (::FindNextFile(handle_, &wfd) == 0)
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{
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end_ = true;
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return;
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}
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}
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value_ = value_type(path(path_ + wfd.cFileName));
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}
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else
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end_ = true;
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#elif defined(NANA_POSIX)
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struct dirent * dnt = readdir(reinterpret_cast<DIR*>(handle_));
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if (dnt)
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{
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while (_m_ignore(dnt->d_name))
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{
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dnt = readdir(reinterpret_cast<DIR*>(handle_));
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if (!dnt)
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{
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end_ = true;
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return;
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}
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}
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value_ = value_type(path(path_ + dnt->d_name));
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}
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else
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end_ = true;
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#endif
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}
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}
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//end class directory_iterator
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bool not_found_error(int errval)
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{
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#if defined(NANA_WINDOWS)
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switch (errval)
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{
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case ERROR_FILE_NOT_FOUND:
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case ERROR_PATH_NOT_FOUND:
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case ERROR_INVALID_NAME:
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case ERROR_INVALID_DRIVE:
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case ERROR_NOT_READY:
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case ERROR_INVALID_PARAMETER:
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case ERROR_BAD_PATHNAME:
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case ERROR_BAD_NETPATH:
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return true;
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}
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return false;
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#elif defined(NANA_POSIX)
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return (errval == ENOENT || errval == ENOTDIR);
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#else
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static_assert(false, "Only Windows and Unix are supported now (Mac OS is experimental)");
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#endif
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}
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namespace detail
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{
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bool rm_file(const path& p)
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{
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if (p.empty())
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return false;
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#if defined(NANA_WINDOWS)
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return (FALSE != ::DeleteFileW(p.c_str()));
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#elif defined(NANA_POSIX)
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return (!std::remove(p.c_str()));
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#endif
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}
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bool rm_dir(const path& p)
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{
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#if defined(NANA_WINDOWS)
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return (FALSE != ::RemoveDirectoryW(p.c_str())) || not_found_error(static_cast<int>(::GetLastError()));
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#elif defined(NANA_POSIX)
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return (!::rmdir(p.c_str())) || not_found_error(errno);
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#endif
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}
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bool rm_dir(const path& p, bool fails_if_not_empty);
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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)
|
|
{
|
|
auto subpath = path + f.path().filename().native();
|
|
|
|
if (is_directory(f))
|
|
rm_dir_recursive(subpath.c_str());
|
|
else
|
|
rm_file(subpath.c_str());
|
|
}
|
|
return rm_dir(dir, true);
|
|
}
|
|
|
|
bool rm_dir(const path& p, bool fails_if_not_empty)
|
|
{
|
|
if (p.empty())
|
|
return false;
|
|
|
|
#if defined(NANA_WINDOWS)
|
|
if (FALSE != ::RemoveDirectoryW(p.c_str()))
|
|
return true;
|
|
|
|
if (!fails_if_not_empty && (ERROR_DIR_NOT_EMPTY == ::GetLastError()))
|
|
return detail::rm_dir_recursive(p.c_str());
|
|
|
|
return false;
|
|
#elif defined(NANA_POSIX)
|
|
if (::rmdir(p.c_str()))
|
|
{
|
|
if (!fails_if_not_empty && (errno == EEXIST || errno == ENOTEMPTY))
|
|
return detail::rm_dir_recursive(p.c_str());
|
|
|
|
return false;
|
|
}
|
|
return true;
|
|
#endif
|
|
}
|
|
|
|
#if defined(NANA_WINDOWS)
|
|
void filetime_to_c_tm(FILETIME& ft, struct tm& t)
|
|
{
|
|
FILETIME local_file_time;
|
|
if (::FileTimeToLocalFileTime(&ft, &local_file_time))
|
|
{
|
|
SYSTEMTIME st;
|
|
::FileTimeToSystemTime(&local_file_time, &st);
|
|
t.tm_year = st.wYear - 1900;
|
|
t.tm_mon = st.wMonth - 1;
|
|
t.tm_mday = st.wDay;
|
|
t.tm_wday = st.wDayOfWeek - 1;
|
|
t.tm_yday = nana::date::day_in_year(st.wYear, st.wMonth, st.wDay);
|
|
|
|
t.tm_hour = st.wHour;
|
|
t.tm_min = st.wMinute;
|
|
t.tm_sec = st.wSecond;
|
|
}
|
|
}
|
|
#endif
|
|
}//end namespace detail
|
|
|
|
|
|
file_status status(const path& p)
|
|
{
|
|
std::error_code err;
|
|
auto stat = status(p, err);
|
|
|
|
if (err != std::error_code())
|
|
throw filesystem_error("nana::experimental::filesystem::status", p, err);
|
|
|
|
return stat;
|
|
}
|
|
|
|
file_status status(const path& p, std::error_code& ec)
|
|
{
|
|
ec = std::error_code();
|
|
#if defined(NANA_WINDOWS)
|
|
auto attr = ::GetFileAttributesW(p.c_str());
|
|
if (INVALID_FILE_ATTRIBUTES == attr)
|
|
{
|
|
if (not_found_error(static_cast<int>(::GetLastError())))
|
|
return file_status{ file_type::not_found };
|
|
return file_status{ file_type::unknown };
|
|
}
|
|
return file_status{ (FILE_ATTRIBUTE_DIRECTORY & attr) ? file_type::directory : file_type::regular, perms::all };
|
|
#elif defined(NANA_POSIX)
|
|
struct stat path_stat;
|
|
if (0 != ::stat(p.c_str(), &path_stat))
|
|
{
|
|
if (errno == ENOENT || errno == ENOTDIR)
|
|
return file_status{ file_type::not_found };
|
|
|
|
return file_status{ file_type::unknown };
|
|
}
|
|
|
|
auto prms = static_cast<perms>(path_stat.st_mode & static_cast<unsigned>(perms::mask));
|
|
|
|
if (S_ISREG(path_stat.st_mode))
|
|
return file_status{ file_type::regular, prms };
|
|
|
|
if (S_ISDIR(path_stat.st_mode))
|
|
return file_status{ file_type::directory, prms };
|
|
|
|
if (S_ISLNK(path_stat.st_mode))
|
|
return file_status{ file_type::symlink, prms };
|
|
|
|
if (S_ISBLK(path_stat.st_mode))
|
|
return file_status{ file_type::block, prms };
|
|
|
|
if (S_ISCHR(path_stat.st_mode))
|
|
return file_status{ file_type::character, prms };
|
|
|
|
if (S_ISFIFO(path_stat.st_mode))
|
|
return file_status{ file_type::fifo, prms };
|
|
|
|
if (S_ISSOCK(path_stat.st_mode))
|
|
return file_status{ file_type::socket, prms };
|
|
|
|
return file_status{ file_type::unknown };
|
|
#endif
|
|
}
|
|
|
|
bool is_directory(const path& p)
|
|
{
|
|
return (status(p).type() == file_type::directory);
|
|
}
|
|
|
|
std::uintmax_t file_size(const path& p)
|
|
{
|
|
#if defined(NANA_WINDOWS)
|
|
//Some compilation environment may fail to link to GetFileSizeEx
|
|
typedef BOOL(__stdcall *GetFileSizeEx_fptr_t)(HANDLE, PLARGE_INTEGER);
|
|
GetFileSizeEx_fptr_t get_file_size_ex = reinterpret_cast<GetFileSizeEx_fptr_t>(::GetProcAddress(::GetModuleHandleA("Kernel32.DLL"), "GetFileSizeEx"));
|
|
if (get_file_size_ex)
|
|
{
|
|
HANDLE handle = ::CreateFile(p.c_str(), GENERIC_READ, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
|
|
if (INVALID_HANDLE_VALUE != handle)
|
|
{
|
|
LARGE_INTEGER li;
|
|
if (!get_file_size_ex(handle, &li))
|
|
li.QuadPart = 0;
|
|
|
|
::CloseHandle(handle);
|
|
return li.QuadPart;
|
|
}
|
|
}
|
|
return 0;
|
|
#elif defined(NANA_POSIX)
|
|
FILE * stream = ::fopen(p.c_str(), "rb");
|
|
long long size = 0;
|
|
if (stream)
|
|
{
|
|
# if defined(NANA_LINUX)
|
|
fseeko64(stream, 0, SEEK_END);
|
|
size = ftello64(stream);
|
|
# elif defined(NANA_MACOS)
|
|
fseeko(stream, 0, SEEK_END);
|
|
size = ftello(stream);
|
|
# endif
|
|
::fclose(stream);
|
|
}
|
|
return size;
|
|
#endif
|
|
}
|
|
|
|
bool modified_file_time(const path& p, struct tm& t)
|
|
{
|
|
#if defined(NANA_WINDOWS)
|
|
WIN32_FILE_ATTRIBUTE_DATA attr;
|
|
if (::GetFileAttributesEx(p.c_str(), GetFileExInfoStandard, &attr))
|
|
{
|
|
FILETIME local_file_time;
|
|
if (::FileTimeToLocalFileTime(&attr.ftLastWriteTime, &local_file_time))
|
|
{
|
|
SYSTEMTIME st;
|
|
::FileTimeToSystemTime(&local_file_time, &st);
|
|
t.tm_year = st.wYear - 1900;
|
|
t.tm_mon = st.wMonth - 1;
|
|
t.tm_mday = st.wDay;
|
|
t.tm_wday = st.wDayOfWeek - 1;
|
|
t.tm_yday = nana::date::day_in_year(st.wYear, st.wMonth, st.wDay);
|
|
|
|
t.tm_hour = st.wHour;
|
|
t.tm_min = st.wMinute;
|
|
t.tm_sec = st.wSecond;
|
|
return true;
|
|
}
|
|
}
|
|
#elif defined(NANA_POSIX)
|
|
struct stat attr;
|
|
if (0 == ::stat(p.c_str(), &attr))
|
|
{
|
|
t = *(::localtime(&attr.st_ctime));
|
|
return true;
|
|
}
|
|
#endif
|
|
return false;
|
|
}
|
|
|
|
file_time_type last_write_time(const path& p)
|
|
{
|
|
struct tm t;
|
|
modified_file_time(p, t);
|
|
std::chrono::system_clock::time_point dateTime =std::chrono::system_clock::from_time_t( mktime(&t) );
|
|
return dateTime;
|
|
}
|
|
|
|
bool create_directory(const path& p)
|
|
{
|
|
#if defined(NANA_WINDOWS)
|
|
return (FALSE != ::CreateDirectoryW(p.c_str(), 0));
|
|
#elif defined(NANA_POSIX)
|
|
return (0 == ::mkdir(p.c_str(), static_cast<int>(perms::all)));
|
|
#endif
|
|
}
|
|
|
|
bool remove(const path& p)
|
|
{
|
|
auto stat = status(p);
|
|
if (stat.type() == file_type::directory)
|
|
return detail::rm_dir(p);
|
|
|
|
return detail::rm_file(p);
|
|
}
|
|
|
|
bool remove(const path& p, std::error_code & ec)
|
|
{
|
|
ec.clear();
|
|
auto stat = status(p);
|
|
if (stat.type() == file_type::directory)
|
|
return detail::rm_dir(p);
|
|
|
|
return detail::rm_file(p);
|
|
}
|
|
|
|
path path_user()
|
|
{
|
|
#if defined(NANA_WINDOWS)
|
|
wchar_t pstr[MAX_PATH];
|
|
if (SUCCEEDED(SHGetFolderPath(0, CSIDL_PROFILE, 0, SHGFP_TYPE_CURRENT, pstr)))
|
|
return pstr;
|
|
#elif defined(NANA_LINUX) || defined(NANA_MACOS)
|
|
const char * pstr = ::getenv("HOME");
|
|
if (pstr)
|
|
return pstr;
|
|
#endif
|
|
return path();
|
|
}
|
|
|
|
path current_path()
|
|
{
|
|
#if defined(NANA_WINDOWS)
|
|
wchar_t buf[MAX_PATH];
|
|
DWORD len = ::GetCurrentDirectoryW(MAX_PATH, buf);
|
|
if (len)
|
|
{
|
|
if (len > MAX_PATH)
|
|
{
|
|
wchar_t * p = new wchar_t[len + 1];
|
|
::GetCurrentDirectoryW(len + 1, p);
|
|
std::wstring s = p;
|
|
delete[] p;
|
|
return s;
|
|
}
|
|
return buf;
|
|
}
|
|
#elif defined(NANA_POSIX)
|
|
char buf[260];
|
|
auto pstr = ::getcwd(buf, 260);
|
|
if (pstr)
|
|
return pstr;
|
|
|
|
int bytes = 260 + 260;
|
|
while (ERANGE == errno)
|
|
{
|
|
std::unique_ptr<char[]> buf(new char[bytes]);
|
|
auto pstr = ::getcwd(buf.get(), bytes);
|
|
if (pstr)
|
|
return path(pstr);
|
|
|
|
bytes += 260;
|
|
}
|
|
#endif
|
|
return path();
|
|
}
|
|
|
|
void current_path(const path& p)
|
|
{
|
|
#if defined(NANA_WINDOWS)
|
|
::SetCurrentDirectoryW(p.c_str());
|
|
#elif defined(NANA_POSIX)
|
|
::chdir(p.c_str());
|
|
#endif
|
|
}
|
|
|
|
#ifndef CXX_NO_INLINE_NAMESPACE
|
|
} //end namespace v1
|
|
#endif
|
|
}//end namespace filesystem
|
|
} //end namespace experimental
|
|
}//end namespace nana
|