block.h

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#ifndef __block_h__
#define __block_h__
#include <sys/types.h>
class block {
    void *buffer;
    size_t bytes; 
    size_t blockSize; 
    size_t startOffset; 
    bool hole; 
  public:
    explicit block(size_t aBlockSize);
    ~block();
    size_t size() const {
        return bytes;   
    }
    bool empty() const {
        return bytes == 0;   
    }
    size_t max_size() const {
        return blockSize;   
    }
    size_t offset() const {
        return startOffset;   
    }
    void clear(size_t aOffset) {
        startOffset = aOffset;
        bytes = 0;   
        hole = false;
    }
    void bump_size(size_t additionalBytes) {
        bytes += additionalBytes;   
    }
    bool isHole() const {
        return hole;
    }
    void setHoleState(bool holeState) {
        hole = holeState;
    }
    void *bufferAt(size_t offset);  
    const void *bufferAt(size_t offset) const;  
    static const void* nullBuffer();
    static size_t nullBufferSize();
};
#endif