Merge pull request #7002
673c6d2 Reduce compilation time of epee/portable_storage_template_helper.h (mj-xmr)
luigi1111
3 years ago
commit
2218e23e84
@ -0,0 +1,231 @@
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// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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// * Neither the name of the Andrey N. Sabelnikov nor the
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// names of its contributors may be used to endorse or promote products
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// derived from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER BE LIABLE FOR ANY
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// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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//
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#include "file_io_utils.h"
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#include <fstream>
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#include <boost/filesystem/path.hpp>
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#include <boost/filesystem/operations.hpp>
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#ifdef WIN32
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#include <windows.h>
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#include "string_tools.h"
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#endif
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// On Windows there is a problem with non-ASCII characters in path and file names
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// as far as support by the standard components used is concerned:
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// The various file stream classes, e.g. std::ifstream and std::ofstream, are
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// part of the GNU C++ Library / libstdc++. On the most basic level they use the
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// fopen() call as defined / made accessible to programs compiled within MSYS2
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// by the stdio.h header file maintained by the MinGW project.
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// The critical point: The implementation of fopen() is part of MSVCRT, the
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// Microsoft Visual C/C++ Runtime Library, and this method does NOT offer any
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// Unicode support.
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// Monero code that would want to continue to use the normal file stream classes
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// but WITH Unicode support could therefore not solve this problem on its own,
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// but 2 different projects from 2 different maintaining groups would need changes
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// in this particular direction - something probably difficult to achieve and
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// with a long time to wait until all new versions / releases arrive.
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// Implemented solution approach: Circumvent the problem by stopping to use std
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// file stream classes on Windows and directly use Unicode-capable WIN32 API
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// calls. Most of the code doing so is concentrated in this header file here.
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namespace epee
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{
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namespace file_io_utils
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{
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bool is_file_exist(const std::string& path)
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{
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boost::filesystem::path p(path);
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return boost::filesystem::exists(p);
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}
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bool save_string_to_file(const std::string& path_to_file, const std::string& str)
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{
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#ifdef WIN32
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std::wstring wide_path;
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try { wide_path = string_tools::utf8_to_utf16(path_to_file); } catch (...) { return false; }
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HANDLE file_handle = CreateFileW(wide_path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
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if (file_handle == INVALID_HANDLE_VALUE)
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return false;
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DWORD bytes_written;
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DWORD bytes_to_write = (DWORD)str.size();
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BOOL result = WriteFile(file_handle, str.data(), bytes_to_write, &bytes_written, NULL);
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CloseHandle(file_handle);
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if (bytes_written != bytes_to_write)
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result = FALSE;
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return result;
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#else
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try
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{
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std::ofstream fstream;
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fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
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fstream.open(path_to_file, std::ios_base::binary | std::ios_base::out | std::ios_base::trunc);
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fstream << str;
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fstream.close();
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return true;
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}
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catch(...)
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{
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return false;
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}
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#endif
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}
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bool get_file_time(const std::string& path_to_file, time_t& ft)
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{
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boost::system::error_code ec;
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ft = boost::filesystem::last_write_time(boost::filesystem::path(path_to_file), ec);
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if(!ec)
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return true;
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else
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return false;
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}
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bool set_file_time(const std::string& path_to_file, const time_t& ft)
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{
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boost::system::error_code ec;
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boost::filesystem::last_write_time(boost::filesystem::path(path_to_file), ft, ec);
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if(!ec)
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return true;
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else
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return false;
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}
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bool load_file_to_string(const std::string& path_to_file, std::string& target_str, size_t max_size)
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{
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#ifdef WIN32
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std::wstring wide_path;
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try { wide_path = string_tools::utf8_to_utf16(path_to_file); } catch (...) { return false; }
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HANDLE file_handle = CreateFileW(wide_path.c_str(), GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
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if (file_handle == INVALID_HANDLE_VALUE)
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return false;
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DWORD file_size = GetFileSize(file_handle, NULL);
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if ((file_size == INVALID_FILE_SIZE) || (uint64_t)file_size > (uint64_t)max_size) {
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CloseHandle(file_handle);
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return false;
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}
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target_str.resize(file_size);
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DWORD bytes_read;
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BOOL result = ReadFile(file_handle, &target_str[0], file_size, &bytes_read, NULL);
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CloseHandle(file_handle);
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if (bytes_read != file_size)
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result = FALSE;
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return result;
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#else
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try
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{
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std::ifstream fstream;
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fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
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fstream.open(path_to_file, std::ios_base::binary | std::ios_base::in | std::ios::ate);
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std::ifstream::pos_type file_size = fstream.tellg();
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if((uint64_t)file_size > (uint64_t)max_size) // ensure a large domain for comparison, and negative -> too large
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return false;//don't go crazy
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size_t file_size_t = static_cast<size_t>(file_size);
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target_str.resize(file_size_t);
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fstream.seekg (0, std::ios::beg);
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fstream.read((char*)target_str.data(), target_str.size());
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fstream.close();
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return true;
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}
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catch(...)
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{
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return false;
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}
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#endif
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}
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bool append_string_to_file(const std::string& path_to_file, const std::string& str)
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{
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// No special Windows implementation because so far not used in Monero code
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try
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{
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std::ofstream fstream;
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fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
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fstream.open(path_to_file.c_str(), std::ios_base::binary | std::ios_base::out | std::ios_base::app);
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fstream << str;
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fstream.close();
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return true;
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}
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catch(...)
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{
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return false;
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}
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}
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bool get_file_size(const std::string& path_to_file, uint64_t &size)
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{
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#ifdef WIN32
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std::wstring wide_path;
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try { wide_path = string_tools::utf8_to_utf16(path_to_file); } catch (...) { return false; }
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HANDLE file_handle = CreateFileW(wide_path.c_str(), GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
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if (file_handle == INVALID_HANDLE_VALUE)
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return false;
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LARGE_INTEGER file_size;
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BOOL result = GetFileSizeEx(file_handle, &file_size);
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CloseHandle(file_handle);
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if (result) {
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size = file_size.QuadPart;
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}
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return size;
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#else
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try
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{
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std::ifstream fstream;
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fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
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fstream.open(path_to_file, std::ios_base::binary | std::ios_base::in | std::ios::ate);
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size = fstream.tellg();
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fstream.close();
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return true;
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}
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catch(...)
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{
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return false;
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}
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#endif
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}
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}
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}
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