netbuffer.h
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//
// netbuffer.h
// BBAAPIRequest
//
// Created by cairui01 on 2020/05/11.
//
#ifndef COMM_AUTOBUFFER_H_
#define COMM_AUTOBUFFER_H_
#include <sys/types.h>
#include <string.h>
class NetBuffer {
public:
enum TSeek {
ESeekStart,
ESeekCur,
ESeekEnd,
};
public:
explicit NetBuffer(size_t _size = 128);
explicit NetBuffer(void* _pbuffer, size_t _len, size_t _size = 128);
explicit NetBuffer(const void* _pbuffer, size_t _len, size_t _size = 128);
~NetBuffer();
void AllocWrite(size_t _readytowrite, bool _changelength = true);
void AddCapacity(size_t _len);
template<class T> void Write(const T& _val)
{ Write(&_val, sizeof(_val));}
template<class T> void Write(off_t& _pos, const T& _val)
{ Write(_pos, &_val, sizeof(_val));}
template<class T> void Write(const off_t& _pos, const T& _val)
{ Write(_pos, &_val, sizeof(_val));}
void Write(const char* const _val)
{ Write(_val, strlen(_val));}
void Write(off_t& _pos, const char* const _val)
{ Write(_pos, _val, strlen(_val));}
void Write(const off_t& _pos, const char* const _val)
{ Write(_pos, _val, strlen(_val));}
void Write(const NetBuffer& _buffer);
void Write(const void* _pbuffer, size_t _len);
void Write(off_t& _pos, const NetBuffer& _buffer);
void Write(off_t& _pos, const void* _pbuffer, size_t _len);
void Write(const off_t& _pos, const NetBuffer& _buffer);
void Write(const off_t& _pos, const void* _pbuffer, size_t _len);
void Write(TSeek _seek, const void* _pbuffer, size_t _len);
template<class T> size_t Read(T& _val)
{ return Read(&_val, sizeof(_val)); }
template<class T> size_t Read(off_t& _pos, T& _val) const
{ return Read(_pos, &_val, sizeof(_val)); }
template<class T> size_t Read(const off_t& _pos, T& _val) const
{ return Read(_pos, &_val, sizeof(_val)); }
size_t Read(void* _pbuffer, size_t _len);
size_t Read(NetBuffer& _rhs , size_t _len);
size_t Read(off_t& _pos, void* _pbuffer, size_t _len) const;
size_t Read(off_t& _pos, NetBuffer& _rhs, size_t _len) const;
size_t Read(const off_t& _pos, void* _pbuffer, size_t _len) const;
size_t Read(const off_t& _pos, NetBuffer& _rhs, size_t _len) const;
void Seek(off_t _offset, TSeek _eorigin);
void Length(off_t _pos, size_t _lenght);
void* Ptr(off_t _offset=0);
void* PosPtr();
const void* Ptr(off_t _offset=0) const;
const void* PosPtr() const;
off_t Pos() const;
size_t Length() const;
size_t Capacity() const;
void Attach(void* _pbuffer, size_t _len);
void Attach(NetBuffer& _rhs);
void* Detach(size_t* _plen = NULL);
void Reset();
private:
void __FitSize(size_t _len);
private:
NetBuffer(const NetBuffer& _rhs);
NetBuffer& operator = (const NetBuffer& _rhs);
private:
unsigned char* parray_;
off_t pos_;
size_t length_;
size_t capacity_;
size_t malloc_unitsize_;
};
template <class S> class copy_wrapper_helper;
template <>
class copy_wrapper_helper<NetBuffer> {
public:
static void copy_constructor(NetBuffer& _lhs, NetBuffer& _rhs)
{ _lhs.Attach(_rhs); }
static void copy_constructor(NetBuffer& _lhs, const NetBuffer& _rhs)
{ _lhs.Attach(const_cast<NetBuffer&>(_rhs)); }
static void destructor(NetBuffer& _delobj) {}
};
#endif