Lots of stuff

2025-09-23 14:53:52 +00:00 · 2019-11-11 00:11:59 -05:00
parent 49a35bb15b
commit c8472f7295
406 changed files with 58313 additions and 88 deletions
--- a/GpD3D/GpFileStream_Win32.cpp
+++ b/GpD3D/GpFileStream_Win32.cpp
@@ -0,0 +1,141 @@
+#include "GpFileStream_Win32.h"
+
+GpFileStream_Win32::GpFileStream_Win32(HANDLE handle, bool readable, bool writeable, bool seekable)
+	: m_handle(handle)
+	, m_readable(readable)
+	, m_writeable(writeable)
+	, m_seekable(seekable)
+{
+}
+
+size_t GpFileStream_Win32::Read(void *bytesOut, size_t size)
+{
+	if (!m_readable)
+		return 0;
+
+	size_t totalRead = 0;
+	while (size)
+	{
+		const DWORD chunkSizeToRead = (size > MAXDWORD) ? MAXDWORD : size;
+		DWORD numRead = 0;
+
+		BOOL readSucceeded = ReadFile(m_handle, bytesOut, chunkSizeToRead, &numRead, nullptr);
+		if (!readSucceeded)
+			return totalRead;
+
+		totalRead += static_cast<size_t>(numRead);
+		size -= static_cast<size_t>(numRead);
+		bytesOut = static_cast<void*>(static_cast<uint8_t*>(bytesOut) + numRead);
+
+		if (numRead != chunkSizeToRead)
+			return totalRead;
+	}
+
+	return totalRead;
+}
+
+size_t GpFileStream_Win32::Write(const void *bytes, size_t size)
+{
+	if (!m_writeable)
+		return 0;
+
+	size_t totalWritten = 0;
+	while (size)
+	{
+		const DWORD chunkSizeToWrite = (size > MAXDWORD) ? MAXDWORD : size;
+		DWORD numWritten = 0;
+
+		BOOL writeSucceeded = WriteFile(m_handle, bytes, chunkSizeToWrite, &numWritten, nullptr);
+		if (!writeSucceeded)
+			return totalWritten;
+
+		totalWritten += static_cast<size_t>(numWritten);
+		size -= static_cast<size_t>(numWritten);
+		bytes = static_cast<const void*>(static_cast<const uint8_t*>(bytes) + numWritten);
+
+		if (numWritten != chunkSizeToWrite)
+			return totalWritten;
+	}
+
+	return totalWritten;
+}
+
+bool GpFileStream_Win32::IsSeekable() const
+{
+	return m_seekable;
+}
+
+bool GpFileStream_Win32::IsReadOnly() const
+{
+	return !m_writeable;
+}
+
+bool GpFileStream_Win32::IsWriteOnly() const
+{
+	return !m_readable;
+}
+
+bool GpFileStream_Win32::SeekStart(PortabilityLayer::UFilePos_t loc)
+{
+	LARGE_INTEGER li;
+	li.QuadPart = static_cast<LONGLONG>(loc);
+	return SetFilePointerEx(m_handle, li, nullptr, FILE_BEGIN) != 0;
+}
+
+bool GpFileStream_Win32::SeekCurrent(PortabilityLayer::FilePos_t loc)
+{
+	LARGE_INTEGER li;
+	li.QuadPart = static_cast<LONGLONG>(loc);
+	return SetFilePointerEx(m_handle, li, nullptr, FILE_CURRENT) != 0;
+}
+
+bool GpFileStream_Win32::SeekEnd(PortabilityLayer::UFilePos_t loc)
+{
+	LARGE_INTEGER li;
+	li.QuadPart = static_cast<LONGLONG>(loc);
+	return SetFilePointerEx(m_handle, li, nullptr, FILE_END) != 0;
+}
+
+bool GpFileStream_Win32::Truncate(PortabilityLayer::UFilePos_t loc)
+{
+	if (!m_writeable)
+		return false;
+
+	PortabilityLayer::UFilePos_t oldPos = Tell();
+	if (!SeekStart(loc))
+		return false;
+
+	if (!SetEndOfFile(m_handle))
+		return false;
+
+	if (!SeekStart(oldPos))
+		return false;
+
+	return true;
+}
+
+PortabilityLayer::UFilePos_t GpFileStream_Win32::Size() const
+{
+	LARGE_INTEGER fsize;
+	if (!GetFileSizeEx(m_handle, &fsize))
+		return 0;
+
+	return static_cast<PortabilityLayer::UFilePos_t>(fsize.QuadPart);
+}
+
+PortabilityLayer::UFilePos_t GpFileStream_Win32::Tell() const
+{
+	LARGE_INTEGER zero;
+	zero.QuadPart = 0;
+
+	LARGE_INTEGER fpos;
+	if (!SetFilePointerEx(m_handle, zero, &fpos, FILE_CURRENT))
+		return 0;
+
+	return static_cast<PortabilityLayer::UFilePos_t>(fpos.QuadPart);
+}
+
+void GpFileStream_Win32::Close()
+{
+	CloseHandle(m_handle);
+}