Lots of stuff

GpD3D/GpFileSystem_Win32.cpp

@@ -0,0 +1,96 @@
+#include "GpFileSystem_Win32.h"
+#include "GpFileStream_Win32.h"
+#include "GpWindows.h"
+#include "GpMemoryBuffer.h"
+
+#include <string>
+#include <Shlwapi.h>
+#include <ShlObj.h>
+
+GpFileSystem_Win32::GpFileSystem_Win32()
+{
+	PWSTR docsPath;
+	if (!FAILED(SHGetKnownFolderPath(FOLDERID_Documents, KF_FLAG_DEFAULT, nullptr, &docsPath)))
+	{
+		try
+		{
+			m_prefsDir = docsPath;
+		}
+		catch(...)
+		{
+			CoTaskMemFree(docsPath);
+			throw;
+		}
+
+		m_prefsDir.append(L"\\GlidePort");
+
+		CreateDirectoryW(m_prefsDir.c_str(), nullptr);
+		m_prefsDir.append(L"\\");
+	}
+}
+
+bool GpFileSystem_Win32::FileExists(PortabilityLayer::EVirtualDirectory virtualDirectory, const char *path)
+{
+	wchar_t winPath[MAX_PATH + 1];
+
+	if (!ResolvePath(virtualDirectory, path, winPath))
+		return false;
+
+	return PathFileExistsW(winPath) != 0;
+}
+
+PortabilityLayer::IOStream *GpFileSystem_Win32::OpenFile(PortabilityLayer::EVirtualDirectory virtualDirectory, const char *path, bool writeAccess, bool create)
+{
+	wchar_t winPath[MAX_PATH + 1];
+
+	if (!ResolvePath(virtualDirectory, path, winPath))
+		return false;
+
+	const DWORD desiredAccess = writeAccess ? (GENERIC_WRITE | GENERIC_READ) : GENERIC_READ;
+	const DWORD creationDisposition = create ? OPEN_ALWAYS : OPEN_EXISTING;
+
+	HANDLE h = CreateFileW(winPath, desiredAccess, FILE_SHARE_READ, nullptr, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, nullptr);
+
+	return new GpFileStream_Win32(h, true, writeAccess, true);
+}
+
+GpFileSystem_Win32 *GpFileSystem_Win32::GetInstance()
+{
+	return &ms_instance;
+}
+
+bool GpFileSystem_Win32::ResolvePath(PortabilityLayer::EVirtualDirectory virtualDirectory, const char *path, wchar_t *outPath)
+{
+	const wchar_t *baseDir = nullptr;
+
+	switch (virtualDirectory)
+	{
+	case PortabilityLayer::EVirtualDirectory_ApplicationData:
+		baseDir = L"D:\\Source Code\\GlidePort\\Packaged\\";
+		break;
+	case PortabilityLayer::EVirtualDirectory_Prefs:
+		baseDir = m_prefsDir.c_str();
+		break;
+	default:
+		return false;
+	}
+
+	if (baseDir == nullptr)
+		return false;
+
+	const size_t baseDirLen = wcslen(baseDir);
+	const size_t pathLen = strlen(path);
+
+	if (baseDirLen >= MAX_PATH || MAX_PATH - baseDirLen < pathLen)
+		return false;
+
+	memcpy(outPath, baseDir, sizeof(wchar_t) * baseDirLen);
+	for (size_t i = 0; i < pathLen; i++)
+		outPath[baseDirLen + i] = static_cast<wchar_t>(path[i]);
+
+	outPath[baseDirLen + pathLen] = static_cast<wchar_t>(0);
+
+	return true;
+}
+
+GpFileSystem_Win32 GpFileSystem_Win32::ms_instance;