blob: c9a4cb0241a0407bf4e7e2d86617ab0b5bc2dcd9 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
#pragma once
#include <Core/Defines.h>
#include <IO/WriteBuffer.h>
#include <base/itoa.h>
template <typename T> constexpr size_t max_int_width = 20;
template <> inline constexpr size_t max_int_width<UInt8> = 3; /// 255
template <> inline constexpr size_t max_int_width<Int8> = 4; /// -128
template <> inline constexpr size_t max_int_width<UInt16> = 5; /// 65535
template <> inline constexpr size_t max_int_width<Int16> = 6; /// -32768
template <> inline constexpr size_t max_int_width<UInt32> = 10; /// 4294967295
template <> inline constexpr size_t max_int_width<Int32> = 11; /// -2147483648
template <> inline constexpr size_t max_int_width<UInt64> = 20; /// 18446744073709551615
template <> inline constexpr size_t max_int_width<Int64> = 20; /// -9223372036854775808
template <> inline constexpr size_t max_int_width<UInt128> = 39; /// 340282366920938463463374607431768211455
template <> inline constexpr size_t max_int_width<Int128> = 40; /// -170141183460469231731687303715884105728
template <> inline constexpr size_t max_int_width<UInt256> = 78; /// 115792089237316195423570985008687907853269984665640564039457584007913129639935
template <> inline constexpr size_t max_int_width<Int256> = 78; /// -57896044618658097711785492504343953926634992332820282019728792003956564819968
namespace DB
{
namespace detail
{
template <typename T>
void NO_INLINE writeUIntTextFallback(T x, WriteBuffer & buf)
{
char tmp[max_int_width<T>];
char * end = itoa(x, tmp);
buf.write(tmp, end - tmp);
}
}
template <typename T>
void writeIntText(T x, WriteBuffer & buf)
{
if (likely(reinterpret_cast<uintptr_t>(buf.position()) + max_int_width<T> < reinterpret_cast<uintptr_t>(buf.buffer().end())))
buf.position() = itoa(x, buf.position());
else
detail::writeUIntTextFallback(x, buf);
}
}
|
