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-// 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 <google/protobuf/stubs/common.h>
-
-#include <iosfwd>
-
-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 LIBPROTOBUF_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.
- LIBPROTOBUF_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;
-};
-
-LIBPROTOBUF_EXPORT extern const uint128_pod kuint128max;
-
-// allow uint128 to be logged
-LIBPROTOBUF_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
-
-#endif // GOOGLE_PROTOBUF_STUBS_INT128_H_
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-22 14:20:50 +0000