Reduce compilation time of epee/portable_storage_template_helper.h

1 files changed, 231 insertions, 0 deletions

diff --git a/contrib/epee/src/file_io_utils.cpp b/contrib/epee/src/file_io_utils.cpp
new file mode 100644
index 000000000..5072adcbc
--- /dev/null
+++ b/contrib/epee/src/file_io_utils.cpp
@@ -0,0 +1,231 @@
+// Copyright (c) 2006-2013, Andrey N. Sabelnikov, www.sabelnikov.net
+// All rights reserved.
+// 
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above copyright
+// notice, this list of conditions and the following disclaimer in the
+// documentation and/or other materials provided with the distribution.
+// * Neither the name of the Andrey N. Sabelnikov nor the
+// names of its contributors may be used to endorse or promote products
+// derived from this software without specific prior written permission.
+// 
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER  BE LIABLE FOR ANY
+// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+// 
+
+#include "file_io_utils.h"
+
+#include <fstream>
+#include <boost/filesystem/path.hpp>
+#include <boost/filesystem/operations.hpp>
+#ifdef WIN32
+#include <windows.h>
+#include "string_tools.h"
+#endif
+
+// On Windows there is a problem with non-ASCII characters in path and file names
+// as far as support by the standard components used is concerned:
+
+// The various file stream classes, e.g. std::ifstream and std::ofstream, are
+// part of the GNU C++ Library / libstdc++. On the most basic level they use the
+// fopen() call as defined / made accessible to programs compiled within MSYS2
+// by the stdio.h header file maintained by the MinGW project.
+
+// The critical point: The implementation of fopen() is part of MSVCRT, the
+// Microsoft Visual C/C++ Runtime Library, and this method does NOT offer any
+// Unicode support.
+
+// Monero code that would want to continue to use the normal file stream classes
+// but WITH Unicode support could therefore not solve this problem on its own,
+// but 2 different projects from 2 different maintaining groups would need changes
+// in this particular direction - something probably difficult to achieve and
+// with a long time to wait until all new versions / releases arrive.
+
+// Implemented solution approach: Circumvent the problem by stopping to use std
+// file stream classes on Windows and directly use Unicode-capable WIN32 API
+// calls. Most of the code doing so is concentrated in this header file here.
+
+namespace epee
+{
+namespace file_io_utils
+{
+ 
+	bool is_file_exist(const std::string& path)
+	{
+		boost::filesystem::path p(path);
+		return boost::filesystem::exists(p);
+	}
+
+
+	bool save_string_to_file(const std::string& path_to_file, const std::string& str)
+	{
+#ifdef WIN32
+                std::wstring wide_path;
+                try { wide_path = string_tools::utf8_to_utf16(path_to_file); } catch (...) { return false; }
+                HANDLE file_handle = CreateFileW(wide_path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL);
+                if (file_handle == INVALID_HANDLE_VALUE)
+                    return false;
+                DWORD bytes_written;
+                DWORD bytes_to_write = (DWORD)str.size();
+                BOOL result = WriteFile(file_handle, str.data(), bytes_to_write, &bytes_written, NULL);
+                CloseHandle(file_handle);
+                if (bytes_written != bytes_to_write)
+                    result = FALSE;
+                return result;
+#else
+		try
+		{
+			std::ofstream fstream;
+			fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
+			fstream.open(path_to_file, std::ios_base::binary | std::ios_base::out | std::ios_base::trunc);
+			fstream << str;
+			fstream.close();
+			return true;
+		}
+
+		catch(...)
+		{
+			return false;
+		}
+#endif
+	}
+
+
+	bool get_file_time(const std::string& path_to_file, time_t& ft)
+	{
+		boost::system::error_code ec;
+		ft = boost::filesystem::last_write_time(boost::filesystem::path(path_to_file), ec);
+		if(!ec)
+			return true;
+		else
+			return false;
+	}
+
+
+	bool set_file_time(const std::string& path_to_file, const time_t& ft)
+	{
+		boost::system::error_code ec;
+		boost::filesystem::last_write_time(boost::filesystem::path(path_to_file), ft, ec);
+		if(!ec)
+			return true;
+		else
+			return false;
+	}
+
+
+
+	bool load_file_to_string(const std::string& path_to_file, std::string& target_str, size_t max_size)
+	{
+#ifdef WIN32
+                std::wstring wide_path;
+                try { wide_path = string_tools::utf8_to_utf16(path_to_file); } catch (...) { return false; }
+                HANDLE file_handle = CreateFileW(wide_path.c_str(), GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+                if (file_handle == INVALID_HANDLE_VALUE)
+                    return false;
+                DWORD file_size = GetFileSize(file_handle, NULL);
+                if ((file_size == INVALID_FILE_SIZE) || (uint64_t)file_size > (uint64_t)max_size) {
+                    CloseHandle(file_handle);
+                    return false;
+                }
+                target_str.resize(file_size);
+                DWORD bytes_read;
+                BOOL result = ReadFile(file_handle, &target_str[0], file_size, &bytes_read, NULL);
+                CloseHandle(file_handle);
+                if (bytes_read != file_size)
+                    result = FALSE;
+                return result;
+#else
+		try
+		{
+			std::ifstream fstream;
+			fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
+			fstream.open(path_to_file, std::ios_base::binary | std::ios_base::in | std::ios::ate);
+
+			std::ifstream::pos_type file_size = fstream.tellg();
+			
+			if((uint64_t)file_size > (uint64_t)max_size) // ensure a large domain for comparison, and negative -> too large
+				return false;//don't go crazy
+			size_t file_size_t = static_cast<size_t>(file_size);
+
+			target_str.resize(file_size_t);
+
+			fstream.seekg (0, std::ios::beg);
+			fstream.read((char*)target_str.data(), target_str.size());
+			fstream.close();
+			return true;
+		}
+
+		catch(...)
+		{
+			return false;
+		}
+#endif
+	}
+
+
+	bool append_string_to_file(const std::string& path_to_file, const std::string& str)
+	{
+                // No special Windows implementation because so far not used in Monero code
+		try
+		{
+			std::ofstream fstream;
+			fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
+			fstream.open(path_to_file.c_str(), std::ios_base::binary | std::ios_base::out | std::ios_base::app);
+			fstream << str;
+			fstream.close();
+			return true;
+		}
+
+		catch(...)
+		{
+			return false;
+		}
+	}
+
+
+	bool get_file_size(const std::string& path_to_file, uint64_t &size)
+	{
+#ifdef WIN32
+                std::wstring wide_path;
+                try { wide_path = string_tools::utf8_to_utf16(path_to_file); } catch (...) { return false; }
+                HANDLE file_handle = CreateFileW(wide_path.c_str(), GENERIC_READ, 0, NULL, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL);
+                if (file_handle == INVALID_HANDLE_VALUE)
+                    return false;
+                LARGE_INTEGER file_size;
+                BOOL result = GetFileSizeEx(file_handle, &file_size);
+                CloseHandle(file_handle);
+                if (result) {
+                    size = file_size.QuadPart;
+                }
+                return size;
+#else
+		try
+		{
+			std::ifstream fstream;
+			fstream.exceptions(std::ifstream::failbit | std::ifstream::badbit);
+			fstream.open(path_to_file, std::ios_base::binary | std::ios_base::in | std::ios::ate);
+			size = fstream.tellg();
+			fstream.close();
+			return true;
+		}
+
+		catch(...)
+		{
+			return false;
+		}
+#endif
+	}
+
+}
+}