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Wojtek Figat
310
Source/Engine/Platform/Base/FileSystemBase.cpp
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310
Source/Engine/Platform/Base/FileSystemBase.cpp
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// Copyright (c) 2012-2020 Wojciech Figat. All rights reserved.
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#include "Engine/Platform/FileSystem.h"
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#include "Engine/Platform/File.h"
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#include "Engine/Core/Types/Guid.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/Engine/Globals.h"
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bool FileSystemBase::ShowOpenFileDialog(Window* parentWindow, const StringView& initialDirectory, const StringView& filter, bool multiSelect, const StringView& title, Array<String, HeapAllocation>& filenames)
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{
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// No supported
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return true;
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}
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bool FileSystemBase::ShowSaveFileDialog(Window* parentWindow, const StringView& initialDirectory, const StringView& filter, bool multiSelect, const StringView& title, Array<String, HeapAllocation>& filenames)
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{
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// No supported
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return true;
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}
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bool FileSystemBase::ShowBrowseFolderDialog(Window* parentWindow, const StringView& initialDirectory, const StringView& title, StringView& path)
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{
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// No supported
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return true;
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}
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bool FileSystemBase::ShowFileExplorer(const StringView& path)
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{
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// No supported
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return true;
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}
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void FileSystemBase::SaveBitmapToFile(byte* data, uint32 width, uint32 height, uint32 bitsPerPixel, const uint32 padding, const String& path)
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{
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// Try to open file
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auto file = File::Open(path, FileMode::CreateAlways, FileAccess::Write, FileShare::None);
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if (file == nullptr)
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return;
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const unsigned long headers_size = 54;
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const unsigned long pixel_data_size = height * ((width * bitsPerPixel / 8) + padding);
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const unsigned int filesize = headers_size + pixel_data_size;
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uint8 bmpfileheader[14] = { 'B', 'M', 0, 0, 0, 0, 0, 0, 0, 0, 54, 0, 0, 0 };
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uint8 bmpinfoheader[40] = { 40, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 24, 0 };
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uint8 bmppad[3] = { 0, 0, 0 };
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// Init the file header
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bmpfileheader[2] = (uint8)(filesize);
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bmpfileheader[3] = (uint8)(filesize >> 8);
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bmpfileheader[4] = (uint8)(filesize >> 16);
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bmpfileheader[5] = (uint8)(filesize >> 24);
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// Init the bitmap info header
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bmpinfoheader[4] = (uint8)(width);
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bmpinfoheader[5] = (uint8)(width >> 8);
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bmpinfoheader[6] = (uint8)(width >> 16);
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bmpinfoheader[7] = (uint8)(width >> 24);
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bmpinfoheader[8] = (uint8)(height);
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bmpinfoheader[9] = (uint8)(height >> 8);
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bmpinfoheader[10] = (uint8)(height >> 16);
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bmpinfoheader[11] = (uint8)(height >> 24);
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// Write the file header
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file->Write(bmpfileheader, sizeof(bmpfileheader));
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// Write the bitmap info header
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file->Write(bmpinfoheader, sizeof(bmpinfoheader));
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// Write the RGB Data
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file->Write(data, pixel_data_size);
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// Close the file
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Delete(file);
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}
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bool FileSystemBase::AreFilePathsEqual(const StringView& path1, const StringView& path2)
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{
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if (path1.Compare(path2, StringSearchCase::CaseSensitive) == 0)
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return true;
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// Normalize file paths
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String filename1(path1);
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String filename2(path2);
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NormalizePath(filename1);
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NormalizePath(filename2);
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return filename1.Compare(filename2, StringSearchCase::IgnoreCase) == 0;
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}
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void FileSystemBase::NormalizePath(String& path)
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{
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path.Replace('\\', '/');
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if (path.Length() > 2 && StringUtils::IsAlpha(path[0]) && path[1] == ':')
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{
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path[2] = '\\';
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}
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}
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bool FileSystemBase::IsRelative(const String& path)
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{
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const bool isRooted =
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(path.Length() >= 2 && StringUtils::IsAlpha(path[0]) && path[1] == ':') ||
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path.StartsWith(TEXT("\\\\")) ||
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path.StartsWith('/') ||
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path.StartsWith('\\') ||
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path.StartsWith('/');
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return !isRooted;
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}
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String FileSystemBase::GetExtension(const StringView& path)
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{
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Char chr;
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int32 length = path.Length();
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int32 num = length;
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do
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{
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num--;
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if (num < 0)
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{
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break;
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}
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chr = path[num];
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if (chr != '.')
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{
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continue;
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}
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if (num == length - 1)
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{
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return String::Empty;
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}
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num++;
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return path.Substring(num, length - num);
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} while (chr != TEXT('\\') && chr != TEXT('/') && chr != TEXT(':'));
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return String::Empty;
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}
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void FileSystemBase::GetTempFilePath(String& tmpPath)
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{
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tmpPath = Globals::TemporaryFolder / Guid::New().ToString(Guid::FormatType::N);
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}
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static void SplitPath(const String& path, Array<String>& splitPath)
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{
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int32 start = 0;
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int32 separatorPos;
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do
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{
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separatorPos = path.FindFirstOf(TEXT("\\/"), start);
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if (separatorPos == -1)
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splitPath.Add(path.Substring(start));
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else
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splitPath.Add(path.Substring(start, separatorPos - start));
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start = separatorPos + 1;
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} while (separatorPos != -1);
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}
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String FileSystemBase::ConvertAbsolutePathToRelative(const String& basePath, const String& path)
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{
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Array<String> toDirs;
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Array<String> fromDirs;
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SplitPath(path, toDirs);
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SplitPath(basePath, fromDirs);
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String output;
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Array<String>::Iterator toIt = toDirs.Begin(), fromIt = fromDirs.Begin();
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const Array<String>::Iterator toEnd = toDirs.End(), fromEnd = fromDirs.End();
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while (toIt != toEnd && fromIt != fromEnd && *toIt == *fromIt)
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{
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++toIt;
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++fromIt;
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}
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while (fromIt != fromEnd)
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{
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output += TEXT("../");
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++fromIt;
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}
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while (toIt != toEnd)
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{
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output += *toIt;
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++toIt;
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if (toIt != toEnd)
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output += '/';
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}
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return output;
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}
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bool FileSystemBase::CopyFile(const String& dst, const String& src)
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{
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// Open and create files
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const auto srcFile = File::Open(src, FileMode::OpenExisting, FileAccess::Read);
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if (!srcFile)
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{
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return true;
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}
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const auto dstFile = File::Open(dst, FileMode::CreateAlways, FileAccess::Write);
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if (!dstFile)
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{
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Delete(srcFile);
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return true;
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}
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// Skip for empty file
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uint32 size = srcFile->GetSize();
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if (size == 0)
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{
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Delete(srcFile);
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Delete(dstFile);
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return false;
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}
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// Copy data
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const uint32 bufferSize = Math::Min<uint32>(1024 * 1024, size);
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byte* buffer = (byte*)Allocator::Allocate(bufferSize);
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while (size)
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{
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const uint32 readSize = Math::Min<uint32>(bufferSize, size);
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srcFile->Read(buffer, readSize);
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dstFile->Write(buffer, readSize);
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size -= readSize;
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}
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Allocator::Free(buffer);
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// Cleanup
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Delete(srcFile);
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Delete(dstFile);
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return false;
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}
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bool FileSystemBase::CopyDirectory(const String& dst, const String& src, bool withSubDirectories)
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{
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// Check if source exists
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if (!FileSystem::DirectoryExists(*src))
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return false;
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// Copy
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return FileSystemBase::DirectoryCopyHelper(dst, src, withSubDirectories);
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}
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String FileSystemBase::ConvertRelativePathToAbsolute(const String& path)
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{
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return ConvertRelativePathToAbsolute(Globals::StartupFolder, path);
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}
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String FileSystemBase::ConvertRelativePathToAbsolute(const String& basePath, const String& path)
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{
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String fullyPathed;
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if (IsRelative(path))
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{
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fullyPathed = basePath;
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}
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fullyPathed /= path;
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NormalizePath(fullyPathed);
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return fullyPathed;
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}
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String FileSystemBase::ConvertAbsolutePathToRelative(const String& path)
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{
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return ConvertAbsolutePathToRelative(Globals::StartupFolder, path);
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}
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bool FileSystemBase::DirectoryCopyHelper(const String& dst, const String& src, bool withSubDirectories)
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{
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// Create dst directory
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if (!FileSystem::DirectoryExists(dst))
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{
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if (FileSystem::CreateDirectory(dst))
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return true;
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}
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// Copy all files
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Array<String> cache(32);
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if (FileSystem::DirectoryGetFiles(cache, *src, TEXT("*"), DirectorySearchOption::TopDirectoryOnly))
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return true;
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for (int32 i = 0; i < cache.Count(); i++)
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{
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String dstFile = dst / StringUtils::GetFileName(cache[i]);
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if (FileSystem::CopyFile(*dstFile, *cache[i]))
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return true;
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}
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// Copy all subdirectories (if need to)
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if (withSubDirectories)
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{
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cache.Clear();
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if (FileSystem::GetChildDirectories(cache, src))
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return true;
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for (int32 i = 0; i < cache.Count(); i++)
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{
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String dstDir = dst / StringUtils::GetFileName(cache[i]);
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if (DirectoryCopyHelper(dstDir, cache[i], true))
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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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