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// GZipFile.h
// Declares the cGZipFile class representing a RAII wrapper over zlib's GZip file routines
#pragma once
#include "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;
} ;
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