// Gzip Writer
//
// Douglas Thrift
//
// $Id$

#ifndef _GzipWriter_hpp_
#define _GzipWriter_hpp_

#include <cxx/platform.hpp>

#ifdef MENES_PRAGMA_ONCE
#pragma once
#endif

#include <api/error.hpp>
#include <ios/streams.hpp>

#include <errno.h>
#include <zlib.h>

class Error : public api::Error
{
	int code;
	cse::String message;
public:
	Error(gzFile file) : message(::gzerror(file, &code))
	{
		if (code == Z_ERRNO)
#if defined(API_HAS_POSIX)
			throw api::Posix::Error();
#endif
	}

	virtual int GetNumber() const
	{
		return code;
	}

	virtual cse::String GetMessage() const
	{
		return _S<ios::String>() << "Zlib[#" << code << "]" << message;
	}
};

_finline gzFile CheckError(gzFile status)
{
	if (status == NULL)
		throw Error(status);

	return status;
}

_finline int CheckError(int status, gzFile file)
{
	if (status != Z_OK)
		throw Error(file);

	return status;
}

class GzipWriter : public ios::Writer
{
	gzFile file;
public:
	GzipWriter(const cse::String &path);
	virtual ~GzipWriter();
	virtual size_t Write(const byte_t *data, size_t length);
	virtual void Flush();
};

#endif//_GzipWriter_hpp_