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#pragma once
#include <zlib.h>
#include <Handle.h>
#include <Async.h>
namespace Balau {
class ZStream : public Filter {
public:
typedef enum {
ZLIB,
GZIP,
RAW,
} header_t;
ZStream(IO<Handle> h, int level = Z_BEST_COMPRESSION, header_t header = ZLIB);
virtual void close() throw (GeneralException) override;
virtual ssize_t read(void * buf, size_t count) throw (GeneralException) override;
virtual ssize_t write(const void * buf, size_t count) throw (GeneralException) override;
virtual bool isEOF() override { return m_phase == CLOSING || m_eof || Filter::isEOF(); }
virtual bool isClosed() override { return m_phase == CLOSING || Filter::isClosed(); }
virtual const char * getName() override { return m_name.to_charp(); }
void flush() { doFlush(false); }
void setUseAsyncOp(bool useAsyncOp) { m_useAsyncOp = useAsyncOp; }
virtual bool isPendingComplete() override;
void finish() { doFlush(true); }
void doFlush(bool finish);
private:
z_stream m_zin, m_zout;
String m_name;
uint8_t * m_buf = NULL;
uint8_t * m_wptr;
enum {
IDLE,
READING,
WRITING,
COMPRESSING,
COMPRESSING_IDLE,
DECOMPRESSING,
DECOMPRESSING_IDLE,
WRITING_FINISH,
COMPRESSING_FINISH,
COMPRESSING_FINISH_IDLE,
CLOSING,
} m_phase = IDLE;
size_t m_total, m_count, m_compressed;
AsyncOperation * m_op = NULL;
ssize_t m_status = IDLE;
bool m_useAsyncOp = true, m_eof = false;
};
};
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