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提交 f638ebbb 编写于 作者: A Alexey Milovidov
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Probably better [#METR-22173].

上级 4922eac9
隐藏空白更改
内联 并排
Showing with 55 addition and 272 deletion
dbms/include/DB/IO/VarInt.h
浏览文件 @ f638ebbb
......@@ -105,81 +105,17 @@ inline void readVarInt(Int16 & x, ReadBuffer & istr)
inline void writeVarUInt(UInt64 x, std::ostream & ostr)
{
char buf[9];
buf[0] = static_cast<UInt8>(x | 0x80);
if (x >= (1ULL << 7))
{
buf[1] = static_cast<UInt8>((x >> 7) | 0x80);
if (x >= (1ULL << 14))
{
buf[2] = static_cast<UInt8>((x >> 14) | 0x80);
if (x >= (1ULL << 21))
{
buf[3] = static_cast<UInt8>((x >> 21) | 0x80);
if (x >= (1ULL << 28))
{
buf[4] = static_cast<UInt8>((x >> 28) | 0x80);
if (x >= (1ULL << 35))
{
buf[5] = static_cast<UInt8>((x >> 35) | 0x80);
if (x >= (1ULL << 42))
{
buf[6] = static_cast<UInt8>((x >> 42) | 0x80);
if (x >= (1ULL << 49))
{
buf[7] = static_cast<UInt8>((x >> 49) | 0x80);
if (x >= (1ULL << 56))
{
buf[8] = static_cast<UInt8>(x >> 56);
ostr.write(buf, 9);
}
else
{
buf[7] &= 0x7F;
ostr.write(buf, 8);
}
}
else
{
buf[6] &= 0x7F;
ostr.write(buf, 7);
}
}
else
{
buf[5] &= 0x7F;
ostr.write(buf, 6);
}
}
else
{
buf[4] &= 0x7F;
ostr.write(buf, 5);
}
}
else
{
buf[3] &= 0x7F;
ostr.write(buf, 4);
}
}
else
{
buf[2] &= 0x7F;
ostr.write(buf, 3);
}
}
else
{
buf[1] &= 0x7F;
ostr.write(buf, 2);
}
}
else
for (size_t i = 0; i < 9; ++i)
{
buf[0] &= 0x7F;
ostr.write(buf, 1);
uint8_t byte = x & 0x7F;
if (byte > 0x7F)
x |= 0x80;
ostr.put(x);
x >>= 7;
if (!x)
return;
}
}
......@@ -197,9 +133,9 @@ inline void readVarUInt(UInt64 & x, ReadBuffer & istr)
if (istr.eof())
throwReadAfterEOF();
int byte = *istr.position();
uint64_t byte = *istr.position();
++istr.position();
x |= (static_cast<uint64_t>(byte) & 0x7F) << (7 * i);
x |= (byte & 0x7F) << (7 * i);
if (!(byte & 0x80))
return;
......@@ -209,187 +145,54 @@ inline void readVarUInt(UInt64 & x, ReadBuffer & istr)
inline void readVarUInt(UInt64 & x, std::istream & istr)
{
int byte;
byte = istr.get();
x = static_cast<UInt64>(byte) & 0x7F;
if (byte & 0x80)
x = 0;
for (size_t i = 0; i < 9; ++i)
{
byte = istr.get();
x |= (static_cast<UInt64>(byte) & 0x7F) << 7;
if (byte & 0x80)
{
byte = istr.get();
x |= (static_cast<UInt64>(byte) & 0x7F) << 14;
if (byte & 0x80)
{
byte = istr.get();
x |= (static_cast<UInt64>(byte) & 0x7F) << 21;
if (byte & 0x80)
{
byte = istr.get();
x |= (static_cast<UInt64>(byte) & 0x7F) << 28;
if (byte & 0x80)
{
byte = istr.get();
x |= (static_cast<UInt64>(byte) & 0x7F) << 35;
if (byte & 0x80)
{
byte = istr.get();
x |= (static_cast<UInt64>(byte) & 0x7F) << 42;
if (byte & 0x80)
{
byte = istr.get();
x |= (static_cast<UInt64>(byte) & 0x7F) << 49;
if (byte & 0x80)
{
byte = istr.get();
x |= static_cast<UInt64>(byte) << 56;
}
}
}
}
}
}
}
uint64_t byte = istr.get();
x |= (byte & 0x7F) << (7 * i);
if (!(byte & 0x80))
return;
}
}
inline void writeVarUInt(UInt64 x, WriteBuffer & ostr)
{
char buf[9];
buf[0] = static_cast<UInt8>(x | 0x80);
if (x >= (1ULL << 7))
{
buf[1] = static_cast<UInt8>((x >> 7) | 0x80);
if (x >= (1ULL << 14))
{
buf[2] = static_cast<UInt8>((x >> 14) | 0x80);
if (x >= (1ULL << 21))
{
buf[3] = static_cast<UInt8>((x >> 21) | 0x80);
if (x >= (1ULL << 28))
{
buf[4] = static_cast<UInt8>((x >> 28) | 0x80);
if (x >= (1ULL << 35))
{
buf[5] = static_cast<UInt8>((x >> 35) | 0x80);
if (x >= (1ULL << 42))
{
buf[6] = static_cast<UInt8>((x >> 42) | 0x80);
if (x >= (1ULL << 49))
{
buf[7] = static_cast<UInt8>((x >> 49) | 0x80);
if (x >= (1ULL << 56))
{
buf[8] = static_cast<UInt8>(x >> 56);
ostr.write(buf, 9);
}
else
{
buf[7] &= 0x7F;
ostr.write(buf, 8);
}
}
else
{
buf[6] &= 0x7F;
ostr.write(buf, 7);
}
}
else
{
buf[5] &= 0x7F;
ostr.write(buf, 6);
}
}
else
{
buf[4] &= 0x7F;
ostr.write(buf, 5);
}
}
else
{
buf[3] &= 0x7F;
ostr.write(buf, 4);
}
}
else
{
buf[2] &= 0x7F;
ostr.write(buf, 3);
}
}
else
{
buf[1] &= 0x7F;
ostr.write(buf, 2);
}
}
else
for (size_t i = 0; i < 9; ++i)
{
buf[0] &= 0x7F;
ostr.write(buf, 1);
uint8_t byte = x & 0x7F;
if (byte > 0x7F)
x |= 0x80;
ostr.nextIfAtEnd();
*ostr.position() = x;
++ostr.position();
x >>= 7;
if (!x)
return;
}
}
inline char * writeVarUInt(UInt64 x, char * ostr)
{
*ostr = static_cast<UInt8>(x | 0x80);
if (x >= (1ULL << 7))
for (size_t i = 0; i < 9; ++i)
{
*++ostr = static_cast<UInt8>((x >> 7) | 0x80);
if (x >= (1ULL << 14))
{
*++ostr = static_cast<UInt8>((x >> 14) | 0x80);
if (x >= (1ULL << 21))
{
*++ostr = static_cast<UInt8>((x >> 21) | 0x80);
if (x >= (1ULL << 28))
{
*++ostr = static_cast<UInt8>((x >> 28) | 0x80);
if (x >= (1ULL << 35))
{
*++ostr = static_cast<UInt8>((x >> 35) | 0x80);
if (x >= (1ULL << 42))
{
*++ostr = static_cast<UInt8>((x >> 42) | 0x80);
if (x >= (1ULL << 49))
{
*++ostr = static_cast<UInt8>((x >> 49) | 0x80);
if (x >= (1ULL << 56))
{
*++ostr = static_cast<UInt8>(x >> 56);
}
else
*ostr &= 0x7F;
}
else
*ostr &= 0x7F;
}
else
*ostr &= 0x7F;
}
else
*ostr &= 0x7F;
}
else
*ostr &= 0x7F;
}
else
*ostr &= 0x7F;
}
else
*ostr &= 0x7F;
uint8_t byte = x & 0x7F;
if (byte > 0x7F)
x |= 0x80;
*ostr = x;
++ostr;
x >>= 7;
if (!x)
return ostr;
}
else
*ostr &= 0x7F;
return ++ostr;
return ostr;
}
......@@ -397,41 +200,21 @@ inline const char * readVarUInt(UInt64 & x, const char * istr, size_t size)
{
const char * end = istr + size;
x = static_cast<UInt64>(*istr) & 0x7F;
if (*istr & 0x80 && ++istr < end)
x = 0;
for (size_t i = 0; i < 9; ++i)
{
x |= (static_cast<UInt64>(*istr) & 0x7F) << 7;
if (*istr & 0x80 && ++istr < end)
{
x |= (static_cast<UInt64>(*istr) & 0x7F) << 14;
if (*istr & 0x80 && ++istr < end)
{
x |= (static_cast<UInt64>(*istr) & 0x7F) << 21;
if (*istr & 0x80 && ++istr < end)
{
x |= (static_cast<UInt64>(*istr) & 0x7F) << 28;
if (*istr & 0x80 && ++istr < end)
{
x |= (static_cast<UInt64>(*istr) & 0x7F) << 35;
if (*istr & 0x80 && ++istr < end)
{
x |= (static_cast<UInt64>(*istr) & 0x7F) << 42;
if (*istr & 0x80 && ++istr < end)
{
x |= (static_cast<UInt64>(*istr) & 0x7F) << 49;
if (*istr & 0x80 && ++istr < end)
{
x |= static_cast<UInt64>(*istr) << 56;
}
}
}
}
}
}
}
if (istr == end)
throwReadAfterEOF();
uint64_t byte = *istr;
++istr;
x |= (byte & 0x7F) << (7 * i);
if (!(byte & 0x80))
return istr;
}
return ++istr;
return istr;
}
......
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