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#include "buffer.h"
#include <util/system/yassert.h>
#include <algorithm>
TBufferBase::TBufferBase(size_t size) noexcept
: Size(size)
{
}
size_t
TBufferBase::GetSize() const noexcept {
return Size;
}
void TBufferBase::SetSize(size_t size) noexcept {
Size = size;
}
/////////////////////////////////////////////////////////////////////
template <typename PointerType>
TBufferBaseT<PointerType>::TBufferBaseT(PointerType data, size_t size) noexcept
: TBufferBase(size)
, Data(data)
{
}
template <typename PointerType>
PointerType
TBufferBaseT<PointerType>::GetPointer() const noexcept {
return Data;
}
template <typename PointerType>
void TBufferBaseT<PointerType>::Assign(PointerType data, size_t size) noexcept {
Data = data;
Size = size;
}
template <>
void TBufferBaseT<void*>::Cut(size_t offset) noexcept {
Y_VERIFY_DEBUG(offset <= Size);
Data = static_cast<char*>(Data) + offset;
TBufferBase::Size -= offset;
}
template <>
void TBufferBaseT<const void*>::Cut(size_t offset) noexcept {
Y_VERIFY_DEBUG(offset <= Size);
Data = static_cast<const char*>(Data) + offset;
TBufferBase::Size -= offset;
}
template class TBufferBaseT<void*>;
template class TBufferBaseT<const void*>;
/////////////////////////////////////////////////////////////////////
TConstBuffer::TConstBuffer(const void* data, size_t size) noexcept
: TBufferBaseT<const void*>(data, size)
{
}
TConstBuffer::TConstBuffer(const TMutableBuffer& buffer) noexcept
: TBufferBaseT<const void*>(buffer.GetPointer(), buffer.GetSize())
{
}
TConstBuffer
TConstBuffer::Offset(ptrdiff_t offset, size_t size) const noexcept {
return TConstBuffer(static_cast<const char*>(Data) + offset, std::min(Size - offset, size));
}
////////////////////////////////////////////////////////////////////////////////
TMutableBuffer::TMutableBuffer(void* data, size_t size) noexcept
: TBufferBaseT<void*>(data, size)
{
}
TMutableBuffer
TMutableBuffer::Offset(ptrdiff_t offset, size_t size) const noexcept {
return TMutableBuffer(static_cast<char*>(Data) + offset, std::min(Size - offset, size));
}
size_t
TMutableBuffer::CopyFrom(const TConstBuffer& buffer) const noexcept {
const auto size = std::min(Size, buffer.Size);
std::memcpy(Data, buffer.Data, size);
return size;
}
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