ClickHouse/dbms/src/IO/WriteIntText.h
Alexey Milovidov 7179bb32b2 Balance
2019-02-26 15:31:17 +03:00

34 lines
688 B
C++

#pragma once
#include <Core/Defines.h>
#include <IO/WriteBuffer.h>
#include <common/itoa.h>
/// 40 digits or 39 digits and a sign
#define WRITE_HELPERS_MAX_INT_WIDTH 40U
namespace DB
{
namespace detail
{
template <typename T>
void NO_INLINE writeUIntTextFallback(T x, WriteBuffer & buf)
{
char tmp[WRITE_HELPERS_MAX_INT_WIDTH];
int len = itoa(x, tmp) - tmp;
buf.write(tmp, len);
}
}
template <typename T>
void writeIntText(T x, WriteBuffer & buf)
{
if (likely(buf.position() + WRITE_HELPERS_MAX_INT_WIDTH < buf.buffer().end()))
buf.position() = itoa(x, buf.position());
else
detail::writeUIntTextFallback(x, buf);
}
}