started work on elf class

emulator/Core/FsFile.cpp

@@ -0,0 +1,90 @@
+#include "FsFile.h"
+
+FsFile::FsFile()
+{
+	m_file = nullptr;
+}
+FsFile::FsFile(const std::string& path, fsOpenMode mode)
+{
+	Open(path, mode);
+}
+bool FsFile::Open(const std::string& path, fsOpenMode mode)
+{
+	Close();
+	fopen_s(&m_file, path.c_str(), getOpenMode(mode));
+	return IsOpen();
+}
+bool FsFile::Close()
+{
+	if (!IsOpen() || std::fclose(m_file) != 0) {
+		m_file = nullptr;
+		return false;
+	}
+
+	m_file = nullptr;
+	return true;
+}
+FsFile::~FsFile()
+{
+	Close();
+}
+
+bool FsFile::Write(const void* src, u64 size)
+{
+	if (!IsOpen() || std::fwrite(src, 1, size, m_file) != size) {
+		return false;
+	}
+	return true;
+}
+
+bool FsFile::Read(void* dst, u64 size)
+{
+	if (!IsOpen() || std::fread(dst, 1, size, m_file) != size) {
+		return false;
+	}
+	return true;
+}
+
+u32 FsFile::ReadBytes(void* dst, u64 size)
+{
+	return std::fread(dst, 1, size, m_file);
+}
+
+bool FsFile::Seek(s64 offset, fsSeekMode mode)
+{
+	if (!IsOpen() || _fseeki64(m_file, offset, getSeekMode(mode)) != 0) {
+		return false;
+	}
+	return true;
+}
+
+u64 FsFile::Tell() const
+{
+	if (IsOpen()) {
+		return _ftelli64(m_file);
+	}
+	else {
+		return -1;
+	}
+}
+u64 FsFile::getFileSize()
+{
+	u64 pos = _ftelli64(m_file);
+	if (_fseeki64(m_file, 0, SEEK_END) != 0) {
+
+		return 0;
+	}
+
+	u64 size = _ftelli64(m_file);
+	if (_fseeki64(m_file, pos, SEEK_SET) != 0) {
+
+		return 0;
+	}
+	return size;
+}
+
+bool FsFile::IsOpen() const
+{
+	return m_file != nullptr;
+}
+