1 files changed, 52 insertions, 0 deletions

diff --git a/src/OSSupport/GZipFile.h b/src/OSSupport/GZipFile.h
new file mode 100644
index 000000000..dfb4e8c31
--- /dev/null
+++ b/src/OSSupport/GZipFile.h
@@ -0,0 +1,52 @@
+
+// GZipFile.h
+
+// Declares the cGZipFile class representing a RAII wrapper over zlib's GZip file routines
+
+
+
+
+
+#pragma once
+
+#include "zlib/zlib.h"
+
+
+
+
+
+class cGZipFile
+{
+public:
+	enum eMode
+	{
+		fmRead,      // Read-only. If the file doesn't exist, object will not be valid
+		fmWrite,     // Write-only. If the file already exists, it will be overwritten
+	} ;
+	
+	cGZipFile(void);
+	~cGZipFile();
+	
+	/// Opens the file. Returns true if successful. Fails if a file has already been opened through this object.
+	bool Open(const AString & a_FileName, eMode a_Mode);
+	
+	/// Closes the file, flushing all buffers. This object may be then reused for a different file and / or mode
+	void Close(void);
+	
+	/// Reads the rest of the file and decompresses it into a_Contents. Returns the number of decompressed bytes, <0 for error
+	int ReadRestOfFile(AString & a_Contents);
+	
+	/// Writes a_Contents into file, compressing it along the way. Returns true if successful. Multiple writes are supported.
+	bool Write(const AString & a_Contents) { return Write(a_Contents.data(), (int)(a_Contents.size())); }
+	
+	bool Write(const char * a_Data, int a_Size);
+	
+protected:
+	gzFile m_File;
+	eMode  m_Mode;
+} ;
+
+
+
+
+