diff options
Diffstat (limited to 'NorthstarDedicatedTest/include/protobuf/stubs/int128.h')
| -rw-r--r-- | NorthstarDedicatedTest/include/protobuf/stubs/int128.h | 387 |
1 files changed, 387 insertions, 0 deletions
diff --git a/NorthstarDedicatedTest/include/protobuf/stubs/int128.h b/NorthstarDedicatedTest/include/protobuf/stubs/int128.h new file mode 100644 index 00000000..52d5fb10 --- /dev/null +++ b/NorthstarDedicatedTest/include/protobuf/stubs/int128.h @@ -0,0 +1,387 @@ +// Protocol Buffers - Google's data interchange format +// Copyright 2008 Google Inc. All rights reserved. +// https://developers.google.com/protocol-buffers/ +// +// Redistribution and use in source and binary forms, with or without +// modification, are permitted provided that the following conditions are +// met: +// +// * Redistributions of source code must retain the above copyright +// notice, this list of conditions and the following disclaimer. +// * Redistributions in binary form must reproduce the above +// copyright notice, this list of conditions and the following disclaimer +// in the documentation and/or other materials provided with the +// distribution. +// * Neither the name of Google Inc. nor the names of its +// contributors may be used to endorse or promote products derived from +// this software without specific prior written permission. +// +// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. +#ifndef GOOGLE_PROTOBUF_STUBS_INT128_H_ +#define GOOGLE_PROTOBUF_STUBS_INT128_H_ + +#include <stubs/common.h> + +#include <iosfwd> + +#include <port_def.inc> + +namespace google { +namespace protobuf { + +struct uint128_pod; + +// TODO(xiaofeng): Define GOOGLE_PROTOBUF_HAS_CONSTEXPR when constexpr is +// available. +#ifdef GOOGLE_PROTOBUF_HAS_CONSTEXPR +# define UINT128_CONSTEXPR constexpr +#else +# define UINT128_CONSTEXPR +#endif + +// An unsigned 128-bit integer type. Thread-compatible. +class PROTOBUF_EXPORT uint128 { + public: + UINT128_CONSTEXPR uint128(); // Sets to 0, but don't trust on this behavior. + UINT128_CONSTEXPR uint128(uint64 top, uint64 bottom); +#ifndef SWIG + UINT128_CONSTEXPR uint128(int bottom); + UINT128_CONSTEXPR uint128(uint32 bottom); // Top 96 bits = 0 +#endif + UINT128_CONSTEXPR uint128(uint64 bottom); // hi_ = 0 + UINT128_CONSTEXPR uint128(const uint128_pod &val); + + // Trivial copy constructor, assignment operator and destructor. + + void Initialize(uint64 top, uint64 bottom); + + // Arithmetic operators. + uint128& operator+=(const uint128& b); + uint128& operator-=(const uint128& b); + uint128& operator*=(const uint128& b); + // Long division/modulo for uint128. + uint128& operator/=(const uint128& b); + uint128& operator%=(const uint128& b); + uint128 operator++(int); + uint128 operator--(int); + uint128& operator<<=(int); + uint128& operator>>=(int); + uint128& operator&=(const uint128& b); + uint128& operator|=(const uint128& b); + uint128& operator^=(const uint128& b); + uint128& operator++(); + uint128& operator--(); + + friend uint64 Uint128Low64(const uint128& v); + friend uint64 Uint128High64(const uint128& v); + + // We add "std::" to avoid including all of port.h. + PROTOBUF_EXPORT friend std::ostream& operator<<(std::ostream& o, + const uint128& b); + + private: + static void DivModImpl(uint128 dividend, uint128 divisor, + uint128* quotient_ret, uint128* remainder_ret); + + // Little-endian memory order optimizations can benefit from + // having lo_ first, hi_ last. + // See util/endian/endian.h and Load128/Store128 for storing a uint128. + uint64 lo_; + uint64 hi_; + + // Not implemented, just declared for catching automatic type conversions. + uint128(uint8); + uint128(uint16); + uint128(float v); + uint128(double v); +}; + +// This is a POD form of uint128 which can be used for static variables which +// need to be operated on as uint128. +struct uint128_pod { + // Note: The ordering of fields is different than 'class uint128' but the + // same as its 2-arg constructor. This enables more obvious initialization + // of static instances, which is the primary reason for this struct in the + // first place. This does not seem to defeat any optimizations wrt + // operations involving this struct. + uint64 hi; + uint64 lo; +}; + +PROTOBUF_EXPORT extern const uint128_pod kuint128max; + +// allow uint128 to be logged +PROTOBUF_EXPORT extern std::ostream& operator<<(std::ostream& o, + const uint128& b); + +// Methods to access low and high pieces of 128-bit value. +// Defined externally from uint128 to facilitate conversion +// to native 128-bit types when compilers support them. +inline uint64 Uint128Low64(const uint128& v) { return v.lo_; } +inline uint64 Uint128High64(const uint128& v) { return v.hi_; } + +// TODO: perhaps it would be nice to have int128, a signed 128-bit type? + +// -------------------------------------------------------------------------- +// Implementation details follow +// -------------------------------------------------------------------------- +inline bool operator==(const uint128& lhs, const uint128& rhs) { + return (Uint128Low64(lhs) == Uint128Low64(rhs) && + Uint128High64(lhs) == Uint128High64(rhs)); +} +inline bool operator!=(const uint128& lhs, const uint128& rhs) { + return !(lhs == rhs); +} + +inline UINT128_CONSTEXPR uint128::uint128() : lo_(0), hi_(0) {} +inline UINT128_CONSTEXPR uint128::uint128(uint64 top, uint64 bottom) + : lo_(bottom), hi_(top) {} +inline UINT128_CONSTEXPR uint128::uint128(const uint128_pod& v) + : lo_(v.lo), hi_(v.hi) {} +inline UINT128_CONSTEXPR uint128::uint128(uint64 bottom) + : lo_(bottom), hi_(0) {} +#ifndef SWIG +inline UINT128_CONSTEXPR uint128::uint128(uint32 bottom) + : lo_(bottom), hi_(0) {} +inline UINT128_CONSTEXPR uint128::uint128(int bottom) + : lo_(bottom), hi_(static_cast<int64>((bottom < 0) ? -1 : 0)) {} +#endif + +#undef UINT128_CONSTEXPR + +inline void uint128::Initialize(uint64 top, uint64 bottom) { + hi_ = top; + lo_ = bottom; +} + +// Comparison operators. + +#define CMP128(op) \ +inline bool operator op(const uint128& lhs, const uint128& rhs) { \ + return (Uint128High64(lhs) == Uint128High64(rhs)) ? \ + (Uint128Low64(lhs) op Uint128Low64(rhs)) : \ + (Uint128High64(lhs) op Uint128High64(rhs)); \ +} + +CMP128(<) +CMP128(>) +CMP128(>=) +CMP128(<=) + +#undef CMP128 + +// Unary operators + +inline uint128 operator-(const uint128& val) { + const uint64 hi_flip = ~Uint128High64(val); + const uint64 lo_flip = ~Uint128Low64(val); + const uint64 lo_add = lo_flip + 1; + if (lo_add < lo_flip) { + return uint128(hi_flip + 1, lo_add); + } + return uint128(hi_flip, lo_add); +} + +inline bool operator!(const uint128& val) { + return !Uint128High64(val) && !Uint128Low64(val); +} + +// Logical operators. + +inline uint128 operator~(const uint128& val) { + return uint128(~Uint128High64(val), ~Uint128Low64(val)); +} + +#define LOGIC128(op) \ +inline uint128 operator op(const uint128& lhs, const uint128& rhs) { \ + return uint128(Uint128High64(lhs) op Uint128High64(rhs), \ + Uint128Low64(lhs) op Uint128Low64(rhs)); \ +} + +LOGIC128(|) +LOGIC128(&) +LOGIC128(^) + +#undef LOGIC128 + +#define LOGICASSIGN128(op) \ +inline uint128& uint128::operator op(const uint128& other) { \ + hi_ op other.hi_; \ + lo_ op other.lo_; \ + return *this; \ +} + +LOGICASSIGN128(|=) +LOGICASSIGN128(&=) +LOGICASSIGN128(^=) + +#undef LOGICASSIGN128 + +// Shift operators. + +inline uint128 operator<<(const uint128& val, int amount) { + // uint64 shifts of >= 64 are undefined, so we will need some special-casing. + if (amount < 64) { + if (amount == 0) { + return val; + } + uint64 new_hi = (Uint128High64(val) << amount) | + (Uint128Low64(val) >> (64 - amount)); + uint64 new_lo = Uint128Low64(val) << amount; + return uint128(new_hi, new_lo); + } else if (amount < 128) { + return uint128(Uint128Low64(val) << (amount - 64), 0); + } else { + return uint128(0, 0); + } +} + +inline uint128 operator>>(const uint128& val, int amount) { + // uint64 shifts of >= 64 are undefined, so we will need some special-casing. + if (amount < 64) { + if (amount == 0) { + return val; + } + uint64 new_hi = Uint128High64(val) >> amount; + uint64 new_lo = (Uint128Low64(val) >> amount) | + (Uint128High64(val) << (64 - amount)); + return uint128(new_hi, new_lo); + } else if (amount < 128) { + return uint128(0, Uint128High64(val) >> (amount - 64)); + } else { + return uint128(0, 0); + } +} + +inline uint128& uint128::operator<<=(int amount) { + // uint64 shifts of >= 64 are undefined, so we will need some special-casing. + if (amount < 64) { + if (amount != 0) { + hi_ = (hi_ << amount) | (lo_ >> (64 - amount)); + lo_ = lo_ << amount; + } + } else if (amount < 128) { + hi_ = lo_ << (amount - 64); + lo_ = 0; + } else { + hi_ = 0; + lo_ = 0; + } + return *this; +} + +inline uint128& uint128::operator>>=(int amount) { + // uint64 shifts of >= 64 are undefined, so we will need some special-casing. + if (amount < 64) { + if (amount != 0) { + lo_ = (lo_ >> amount) | (hi_ << (64 - amount)); + hi_ = hi_ >> amount; + } + } else if (amount < 128) { + lo_ = hi_ >> (amount - 64); + hi_ = 0; + } else { + lo_ = 0; + hi_ = 0; + } + return *this; +} + +inline uint128 operator+(const uint128& lhs, const uint128& rhs) { + return uint128(lhs) += rhs; +} + +inline uint128 operator-(const uint128& lhs, const uint128& rhs) { + return uint128(lhs) -= rhs; +} + +inline uint128 operator*(const uint128& lhs, const uint128& rhs) { + return uint128(lhs) *= rhs; +} + +inline uint128 operator/(const uint128& lhs, const uint128& rhs) { + return uint128(lhs) /= rhs; +} + +inline uint128 operator%(const uint128& lhs, const uint128& rhs) { + return uint128(lhs) %= rhs; +} + +inline uint128& uint128::operator+=(const uint128& b) { + hi_ += b.hi_; + uint64 lolo = lo_ + b.lo_; + if (lolo < lo_) + ++hi_; + lo_ = lolo; + return *this; +} + +inline uint128& uint128::operator-=(const uint128& b) { + hi_ -= b.hi_; + if (b.lo_ > lo_) + --hi_; + lo_ -= b.lo_; + return *this; +} + +inline uint128& uint128::operator*=(const uint128& b) { + uint64 a96 = hi_ >> 32; + uint64 a64 = hi_ & 0xffffffffu; + uint64 a32 = lo_ >> 32; + uint64 a00 = lo_ & 0xffffffffu; + uint64 b96 = b.hi_ >> 32; + uint64 b64 = b.hi_ & 0xffffffffu; + uint64 b32 = b.lo_ >> 32; + uint64 b00 = b.lo_ & 0xffffffffu; + // multiply [a96 .. a00] x [b96 .. b00] + // terms higher than c96 disappear off the high side + // terms c96 and c64 are safe to ignore carry bit + uint64 c96 = a96 * b00 + a64 * b32 + a32 * b64 + a00 * b96; + uint64 c64 = a64 * b00 + a32 * b32 + a00 * b64; + this->hi_ = (c96 << 32) + c64; + this->lo_ = 0; + // add terms after this one at a time to capture carry + *this += uint128(a32 * b00) << 32; + *this += uint128(a00 * b32) << 32; + *this += a00 * b00; + return *this; +} + +inline uint128 uint128::operator++(int) { + uint128 tmp(*this); + *this += 1; + return tmp; +} + +inline uint128 uint128::operator--(int) { + uint128 tmp(*this); + *this -= 1; + return tmp; +} + +inline uint128& uint128::operator++() { + *this += 1; + return *this; +} + +inline uint128& uint128::operator--() { + *this -= 1; + return *this; +} + +} // namespace protobuf +} // namespace google + +#include <port_undef.inc> + +#endif // GOOGLE_PROTOBUF_STUBS_INT128_H_ |