initial commit

libnpk/source/libNPK_FileStream.h

@@ -0,0 +1,59 @@
+#pragma once
+
+#include "libNPK.h"
+#include "libNPK_NPKFile.h"
+
+namespace NPK
+{
+
+class CFileStream : public IFileStream
+{
+public:
+	virtual const char* name(void) const {
+		return m_fileName.c_str();
+	}
+
+	virtual uint32_t size(void) const {
+		return m_fileSize;
+	}
+
+	virtual uint32_t read(void* buffer, uint32_t size);
+
+	virtual bool seek(uint32_t offset);
+
+	virtual uint32_t tell(void) const {
+		return m_currentOffset;
+	}
+
+	virtual uint32_t crc32(void);
+
+	virtual bool isEOF(void) const {
+		return m_currentOffset >= m_fileSize;
+	}
+
+protected:
+	//Pack file
+	CNPKFile* m_pNPKFile;
+	// windows file handle
+	HANDLE m_hFileandle;
+	std::string m_fileName;
+	//offset of the file in the pak file
+	uint32_t m_fileOffset = 0;
+	//size of the file
+	uint32_t m_fileSize = 0;
+	//current read offset in the file
+	uint32_t m_currentOffset = 0;
+	//CRC32 checksum of the file
+	uint32_t m_crc32 = 0;
+	//Flag to indicate if CRC32 has been calculated
+	bool m_crc32Calculated = false;
+
+private:
+	CFileStream(CNPKFile* pNPKFile, HANDLE hFile, const INPKFile::FileNode& fileNode);
+	virtual ~CFileStream();
+
+	friend IFileStream* CNPKFile::openFileStream(const char* szFileName);
+	friend void CNPKFile::closeFileStream(IFileStream* fileStream);
+};
+
+}