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Wojtek Figat
363
Source/Engine/Platform/Win32/Win32FileSystem.cpp
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363
Source/Engine/Platform/Win32/Win32FileSystem.cpp
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// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
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#if PLATFORM_WIN32
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#include "Win32FileSystem.h"
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#include "Engine/Core/Types/DateTime.h"
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#include "Engine/Core/Types/String.h"
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#include "Engine/Core/Types/StringView.h"
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#include "Engine/Core/Math/Math.h"
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#include "Engine/Core/Collections/Array.h"
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#include "IncludeWindowsHeaders.h"
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const DateTime WindowsEpoch(1970, 1, 1);
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bool Win32FileSystem::CreateDirectory(const StringView& path)
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{
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// If the specified directory name doesn't exist, do our thing
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const DWORD fileAttributes = GetFileAttributesW(*path);
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if (fileAttributes == INVALID_FILE_ATTRIBUTES)
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{
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const auto error = GetLastError();
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if (error == ERROR_ACCESS_DENIED)
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return false;
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// Recursively do it all again for the parent directory, if any
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const int32 slashIndex = path.FindLast('/');
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if (slashIndex != INVALID_INDEX)
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{
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if (CreateDirectory(path.Substring(0, slashIndex)))
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{
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return true;
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}
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}
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// Create the last directory on the path (the recursive calls will have taken care of the parent directories by now)
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const BOOL result = ::CreateDirectoryW(*path, nullptr);
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if (result == FALSE)
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{
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return true;
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}
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}
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else
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{
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// Specified directory name already exists as a file or directory
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const bool isDirectoryOrJunction =
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((fileAttributes & FILE_ATTRIBUTE_DIRECTORY) != 0) ||
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((fileAttributes & FILE_ATTRIBUTE_REPARSE_POINT) != 0);
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if (!isDirectoryOrJunction)
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{
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return true;
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}
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}
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return false;
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}
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bool Win32FileSystem::DeleteDirectory(const String& path, bool deleteContents)
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{
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// Check if delete contents
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if (deleteContents)
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{
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// Create search pattern
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String pattern = path / '*';
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WIN32_FIND_DATA info;
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HANDLE hp;
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hp = FindFirstFileW(*pattern, &info);
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if (INVALID_HANDLE_VALUE == hp)
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{
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// Check if no files at all
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return GetLastError() != ERROR_FILE_NOT_FOUND;
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}
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do
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{
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// Check if it isn't a special case
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if (((StringUtils::Compare(info.cFileName, TEXT(".")) == 0) || (StringUtils::Compare(info.cFileName, TEXT("..")) == 0)))
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continue;
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// Check if its a directory of a file
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String tmpPath = path / info.cFileName;
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if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
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{
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// Delete sub directory recursively
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if (DeleteDirectory(*tmpPath, true))
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{
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FindClose(hp);
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return true;
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}
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}
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else
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{
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if (!DeleteFileW(*tmpPath))
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{
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FindClose(hp);
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return true;
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}
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}
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} while (FindNextFileW(hp, &info) != 0);
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FindClose(hp);
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if (GetLastError() != ERROR_NO_MORE_FILES)
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{
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return true;
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}
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}
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// Remove directory
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RemoveDirectoryW(*path);
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// Check if still exists
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const int32 result = GetFileAttributesW(*path);
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return (result != 0xFFFFFFFF && (result & FILE_ATTRIBUTE_DIRECTORY));
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}
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bool Win32FileSystem::DirectoryExists(const StringView& path)
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{
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// Check if exists
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const int32 result = GetFileAttributesW(*path);
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return (result != 0xFFFFFFFF && (result & FILE_ATTRIBUTE_DIRECTORY));
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}
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bool Win32FileSystem::DirectoryGetFiles(Array<String>& results, const String& path, const Char* searchPattern, DirectorySearchOption option)
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{
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// Check if use only top directory
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if (option == DirectorySearchOption::TopDirectoryOnly)
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return getFilesFromDirectoryTop(results, path, searchPattern);
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return getFilesFromDirectoryAll(results, path, searchPattern);
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}
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bool Win32FileSystem::GetChildDirectories(Array<String>& results, const String& directory)
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{
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// Try to find first file
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WIN32_FIND_DATA info;
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String pattern = directory / TEXT('*');
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const HANDLE hp = FindFirstFileW(*pattern, &info);
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if (INVALID_HANDLE_VALUE == hp)
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{
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// Check if no files at all
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return GetLastError() != ERROR_FILE_NOT_FOUND;
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}
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do
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{
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// Check if it isn't a special case
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if (((StringUtils::Compare(info.cFileName, TEXT(".")) == 0) || (StringUtils::Compare(info.cFileName, TEXT("..")) == 0)))
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continue;
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// Check if its a directory of a file
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if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
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{
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// Add directory
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results.Add(directory / info.cFileName);
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}
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} while (FindNextFileW(hp, &info) != 0);
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FindClose(hp);
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return GetLastError() != ERROR_NO_MORE_FILES;
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}
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bool Win32FileSystem::FileExists(const StringView& path)
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{
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const uint32 result = GetFileAttributesW(*path);
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return (result != 0xFFFFFFFF && !(result & FILE_ATTRIBUTE_DIRECTORY));
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}
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bool Win32FileSystem::DeleteFile(const StringView& path)
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{
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return DeleteFileW(*path) == 0;
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}
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uint64 Win32FileSystem::GetFileSize(const StringView& path)
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{
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WIN32_FILE_ATTRIBUTE_DATA info;
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if (!!GetFileAttributesExW(*path, GetFileExInfoStandard, &info))
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{
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if ((info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) == 0)
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{
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LARGE_INTEGER li;
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li.HighPart = info.nFileSizeHigh;
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li.LowPart = info.nFileSizeLow;
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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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}
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bool Win32FileSystem::IsReadOnly(const StringView& path)
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{
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uint32 result = GetFileAttributesW(*path);
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if (result != 0xFFFFFFFF)
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{
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return !!(result & FILE_ATTRIBUTE_READONLY);
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}
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return false;
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}
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bool Win32FileSystem::SetReadOnly(const StringView& path, bool isReadOnly)
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{
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return SetFileAttributesW(*path, isReadOnly ? FILE_ATTRIBUTE_READONLY : FILE_ATTRIBUTE_NORMAL) == 0;
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}
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bool Win32FileSystem::MoveFile(const StringView& dst, const StringView& src, bool overwrite)
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{
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DWORD flags = overwrite ? MOVEFILE_REPLACE_EXISTING : 0;
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// Allow to copy files, needed in cases when Temp folder is
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// located on different volume (eg.: Temp is on C:\ and Project in on D:\)
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flags |= MOVEFILE_COPY_ALLOWED;
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// If paths are almost the same but some characters have different case we need to use proxy file
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if (StringUtils::CompareIgnoreCase(*dst, *src) == 0)
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{
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// Get temporary file path
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String tmp;
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GetTempFilePath(tmp);
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// Move file
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return MoveFileExW(*src, *tmp, MOVEFILE_REPLACE_EXISTING) == 0 || MoveFileExW(*tmp, *dst, flags) == 0;
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}
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// Move file
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return MoveFileExW(*src, *dst, flags) == 0;
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}
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bool Win32FileSystem::CopyFile(const StringView& dst, const StringView& src)
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{
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#if PLATFORM_UWP
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const bool overwrite = true;
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COPYFILE2_EXTENDED_PARAMETERS param = { 0 };
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param.dwSize = sizeof(COPYFILE2_EXTENDED_PARAMETERS);
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param.dwCopyFlags = (!overwrite) ? COPY_FILE_FAIL_IF_EXISTS : 0;
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return FAILED(CopyFile2(*src, *dst, ¶m));
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#else
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return CopyFileW(*src, *dst, FALSE) == 0;
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#endif
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}
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void Win32FileSystem::ConvertLineEndingsToDos(const StringView& text, Array<Char>& output)
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{
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// Prepare output (add some space for \r characters, just guess ~1%)
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output.Clear();
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output.EnsureCapacity(Math::CeilToInt(text.Length() * 1.01f));
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// Perform conversion
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auto readPtr = text.Get();
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for (int32 i = 0; i < text.Length(); i++)
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{
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// Try to find LF
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if (*readPtr == '\n')
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{
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// Check if next isn't CR
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if (*(readPtr + 1) != '\r')
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{
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// Append CR
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output.Add('\r');
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}
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}
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// Copy character
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output.Add(*readPtr++);
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}
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}
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bool Win32FileSystem::getFilesFromDirectoryTop(Array<String>& results, const String& directory, const Char* searchPattern)
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{
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// Try to find first file
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WIN32_FIND_DATA info;
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String pattern = directory / searchPattern;
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const HANDLE hp = FindFirstFileW(*pattern, &info);
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if (INVALID_HANDLE_VALUE == hp)
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{
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// Check if no files at all
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return GetLastError() != ERROR_FILE_NOT_FOUND;
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}
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do
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{
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// Check if it isn't a special case
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if (((StringUtils::Compare(info.cFileName, TEXT(".")) == 0) || (StringUtils::Compare(info.cFileName, TEXT("..")) == 0)))
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continue;
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// Check if its a directory or a file
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if (!(info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY))
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{
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// Add file
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results.Add(directory / info.cFileName);
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}
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} while (FindNextFileW(hp, &info) != 0);
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FindClose(hp);
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if (GetLastError() != ERROR_NO_MORE_FILES)
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{
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return true;
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}
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return false;
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}
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bool Win32FileSystem::getFilesFromDirectoryAll(Array<String>& results, const String& directory, const Char* searchPattern)
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{
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// Find all files in this directory
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getFilesFromDirectoryTop(results, directory, searchPattern);
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// Try to find first file/directory
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WIN32_FIND_DATA info;
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const HANDLE hp = FindFirstFileW(*(directory / TEXT('*')), &info);
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if (INVALID_HANDLE_VALUE == hp)
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{
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// Check if no files at all
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return GetLastError() != ERROR_FILE_NOT_FOUND;
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}
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do
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{
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// Check if it isn't a special case
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if ((StringUtils::Compare(info.cFileName, TEXT(".")) == 0) || (StringUtils::Compare(info.cFileName, TEXT("..")) == 0))
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continue;
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// Check if its a directory or a file
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String tmpPath = directory / info.cFileName;
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if (info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY)
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{
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if (getFilesFromDirectoryAll(results, tmpPath, searchPattern))
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{
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FindClose(hp);
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return true;
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}
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}
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} while (FindNextFileW(hp, &info) != 0);
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FindClose(hp);
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return GetLastError() != ERROR_NO_MORE_FILES;
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}
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DateTime Win32FileSystem::GetFileLastEditTime(const StringView& path)
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{
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DateTime result = DateTime::MinValue();
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#if 0
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// Universal way to get file write time but 2x slower on Windows
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auto file = File::Open(path, FileMode::OpenExisting, FileAccess::Read, FileShare::All);
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if (file)
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{
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result = file->GetLastWriteTime();
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Delete(file);
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}
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#endif
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WIN32_FILE_ATTRIBUTE_DATA data;
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if (!!GetFileAttributesExW(*path, GetFileExInfoStandard, &data))
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{
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SYSTEMTIME lpSystemTime;
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FileTimeToSystemTime(&data.ftLastWriteTime, &lpSystemTime);
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result = DateTime(lpSystemTime.wYear, lpSystemTime.wMonth, lpSystemTime.wDay, lpSystemTime.wHour, lpSystemTime.wMinute, lpSystemTime.wSecond, lpSystemTime.wMilliseconds);
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}
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return result;
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}
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#endif
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