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#pragma once
#include "base/base.hpp"
#include "std/vector.hpp"
#include "std/cstring.hpp"
class ArrayByteSource
{
public:
explicit ArrayByteSource(const void * p) : m_p(static_cast<const unsigned char *>(p)) {}
unsigned char ReadByte()
{
return *m_p++;
}
void Read(void * ptr, size_t size)
{
memcpy(ptr, m_p, size);
m_p += size;
}
inline const void * Ptr() const { return m_p; }
inline const unsigned char * PtrUC() const { return m_p; }
inline const char * PtrC() const { return static_cast<char const *>(Ptr()); }
void Advance(size_t size)
{
m_p += size;
}
private:
const unsigned char * m_p;
};
template <class StorageT> class PushBackByteSink
{
public:
explicit PushBackByteSink(StorageT & storage)
: m_Storage(storage)
{
}
void Write(void const * p, size_t size)
{
// assume input buffer as buffer of bytes
unsigned char const * pp = static_cast<unsigned char const *>(p);
m_Storage.insert(m_Storage.end(), pp, pp + size);
}
size_t Pos() const
{
return m_Storage.size();
}
private:
StorageT & m_Storage;
};
class CountingSink
{
public:
CountingSink() : m_Count(0) {}
inline void Write(void const *, size_t size) { m_Count += size; }
inline size_t GetCount() const { return m_Count; }
private:
size_t m_Count;
};
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