ClickHouse/dbms/IO/ReadBufferFromMemory.h
Ivan 97f2a2213e
Move all folders inside /dbms one level up (#9974)
* Move some code outside dbms/src folder
* Fix paths
2020-04-02 02:51:21 +03:00

25 lines
684 B
C++

#pragma once
#include "SeekableReadBuffer.h"
namespace DB
{
/** Allows to read from memory range.
* In comparison with just ReadBuffer, it only adds convenient constructors, that do const_cast.
* In fact, ReadBuffer will not modify data in buffer, but it requires non-const pointer.
*/
class ReadBufferFromMemory : public SeekableReadBuffer
{
public:
template <typename CharT, typename = std::enable_if_t<sizeof(CharT) == 1>>
ReadBufferFromMemory(const CharT * buf, size_t size)
: SeekableReadBuffer(const_cast<char *>(reinterpret_cast<const char *>(buf)), size, 0) {}
off_t seek(off_t off, int whence) override;
off_t getPosition() override;
};
}