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#pragma once
#include <util/generic/buffer.h>
#include <util/generic/noncopyable.h>
#include <util/system/yassert.h>
namespace NBus {
namespace NPrivate {
class TLeftRightBuffer : TNonCopyable {
private:
TBuffer Buffer;
size_t Left;
void CheckInvariant() {
Y_ASSERT(Left <= Buffer.Size());
}
public:
TLeftRightBuffer()
: Left(0)
{
}
TBuffer& GetBuffer() {
return Buffer;
}
size_t Capacity() {
return Buffer.Capacity();
}
void Clear() {
Buffer.Clear();
Left = 0;
}
void Reset() {
Buffer.Reset();
Left = 0;
}
void Compact() {
Buffer.ChopHead(Left);
Left = 0;
}
char* LeftPos() {
return Buffer.Data() + Left;
}
size_t LeftSize() {
return Left;
}
void LeftProceed(size_t count) {
Y_ASSERT(count <= Size());
Left += count;
}
size_t Size() {
return Buffer.Size() - Left;
}
bool Empty() {
return Size() == 0;
}
char* RightPos() {
return Buffer.Data() + Buffer.Size();
}
size_t Avail() {
return Buffer.Avail();
}
};
}
}
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