chore(3p/abseil_cpp): unvendor abseil_cpp r/3786

we weren't actually using these sources anymore, okay?

Change-Id: If701571d9716de308d3512e1eb22c35db0877a66
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5248
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 0 insertions, 390 deletions

diff --git a/third_party/abseil_cpp/absl/numeric/int128.cc b/third_party/abseil_cpp/absl/numeric/int128.cc
deleted file mode 100644
index e21e5e9a4ad4..000000000000
--- a/third_party/abseil_cpp/absl/numeric/int128.cc
+++ /dev/null
@@ -1,390 +0,0 @@
-// Copyright 2017 The Abseil Authors.
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//      https://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-#include "absl/numeric/int128.h"
-
-#include <stddef.h>
-
-#include <cassert>
-#include <iomanip>
-#include <ostream>  // NOLINT(readability/streams)
-#include <sstream>
-#include <string>
-#include <type_traits>
-
-#include "absl/base/internal/bits.h"
-#include "absl/base/optimization.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-
-ABSL_DLL const uint128 kuint128max = MakeUint128(
-    std::numeric_limits<uint64_t>::max(), std::numeric_limits<uint64_t>::max());
-
-namespace {
-
-// Returns the 0-based position of the last set bit (i.e., most significant bit)
-// in the given uint128. The argument is not 0.
-//
-// For example:
-//   Given: 5 (decimal) == 101 (binary)
-//   Returns: 2
-inline ABSL_ATTRIBUTE_ALWAYS_INLINE int Fls128(uint128 n) {
-  if (uint64_t hi = Uint128High64(n)) {
-    ABSL_INTERNAL_ASSUME(hi != 0);
-    return 127 - base_internal::CountLeadingZeros64(hi);
-  }
-  const uint64_t low = Uint128Low64(n);
-  ABSL_INTERNAL_ASSUME(low != 0);
-  return 63 - base_internal::CountLeadingZeros64(low);
-}
-
-// Long division/modulo for uint128 implemented using the shift-subtract
-// division algorithm adapted from:
-// https://stackoverflow.com/questions/5386377/division-without-using
-inline void DivModImpl(uint128 dividend, uint128 divisor, uint128* quotient_ret,
-                       uint128* remainder_ret) {
-  assert(divisor != 0);
-
-  if (divisor > dividend) {
-    *quotient_ret = 0;
-    *remainder_ret = dividend;
-    return;
-  }
-
-  if (divisor == dividend) {
-    *quotient_ret = 1;
-    *remainder_ret = 0;
-    return;
-  }
-
-  uint128 denominator = divisor;
-  uint128 quotient = 0;
-
-  // Left aligns the MSB of the denominator and the dividend.
-  const int shift = Fls128(dividend) - Fls128(denominator);
-  denominator <<= shift;
-
-  // Uses shift-subtract algorithm to divide dividend by denominator. The
-  // remainder will be left in dividend.
-  for (int i = 0; i <= shift; ++i) {
-    quotient <<= 1;
-    if (dividend >= denominator) {
-      dividend -= denominator;
-      quotient |= 1;
-    }
-    denominator >>= 1;
-  }
-
-  *quotient_ret = quotient;
-  *remainder_ret = dividend;
-}
-
-template <typename T>
-uint128 MakeUint128FromFloat(T v) {
-  static_assert(std::is_floating_point<T>::value, "");
-
-  // Rounding behavior is towards zero, same as for built-in types.
-
-  // Undefined behavior if v is NaN or cannot fit into uint128.
-  assert(std::isfinite(v) && v > -1 &&
-         (std::numeric_limits<T>::max_exponent <= 128 ||
-          v < std::ldexp(static_cast<T>(1), 128)));
-
-  if (v >= std::ldexp(static_cast<T>(1), 64)) {
-    uint64_t hi = static_cast<uint64_t>(std::ldexp(v, -64));
-    uint64_t lo = static_cast<uint64_t>(v - std::ldexp(static_cast<T>(hi), 64));
-    return MakeUint128(hi, lo);
-  }
-
-  return MakeUint128(0, static_cast<uint64_t>(v));
-}
-
-#if defined(__clang__) && !defined(__SSE3__)
-// Workaround for clang bug: https://bugs.llvm.org/show_bug.cgi?id=38289
-// Casting from long double to uint64_t is miscompiled and drops bits.
-// It is more work, so only use when we need the workaround.
-uint128 MakeUint128FromFloat(long double v) {
-  // Go 50 bits at a time, that fits in a double
-  static_assert(std::numeric_limits<double>::digits >= 50, "");
-  static_assert(std::numeric_limits<long double>::digits <= 150, "");
-  // Undefined behavior if v is not finite or cannot fit into uint128.
-  assert(std::isfinite(v) && v > -1 && v < std::ldexp(1.0L, 128));
-
-  v = std::ldexp(v, -100);
-  uint64_t w0 = static_cast<uint64_t>(static_cast<double>(std::trunc(v)));
-  v = std::ldexp(v - static_cast<double>(w0), 50);
-  uint64_t w1 = static_cast<uint64_t>(static_cast<double>(std::trunc(v)));
-  v = std::ldexp(v - static_cast<double>(w1), 50);
-  uint64_t w2 = static_cast<uint64_t>(static_cast<double>(std::trunc(v)));
-  return (static_cast<uint128>(w0) << 100) | (static_cast<uint128>(w1) << 50) |
-         static_cast<uint128>(w2);
-}
-#endif  // __clang__ && !__SSE3__
-}  // namespace
-
-uint128::uint128(float v) : uint128(MakeUint128FromFloat(v)) {}
-uint128::uint128(double v) : uint128(MakeUint128FromFloat(v)) {}
-uint128::uint128(long double v) : uint128(MakeUint128FromFloat(v)) {}
-
-uint128 operator/(uint128 lhs, uint128 rhs) {
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-  return static_cast<unsigned __int128>(lhs) /
-         static_cast<unsigned __int128>(rhs);
-#else  // ABSL_HAVE_INTRINSIC_INT128
-  uint128 quotient = 0;
-  uint128 remainder = 0;
-  DivModImpl(lhs, rhs, &quotient, &remainder);
-  return quotient;
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-}
-uint128 operator%(uint128 lhs, uint128 rhs) {
-#if defined(ABSL_HAVE_INTRINSIC_INT128)
-  return static_cast<unsigned __int128>(lhs) %
-         static_cast<unsigned __int128>(rhs);
-#else  // ABSL_HAVE_INTRINSIC_INT128
-  uint128 quotient = 0;
-  uint128 remainder = 0;
-  DivModImpl(lhs, rhs, &quotient, &remainder);
-  return remainder;
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-}
-
-namespace {
-
-std::string Uint128ToFormattedString(uint128 v, std::ios_base::fmtflags flags) {
-  // Select a divisor which is the largest power of the base < 2^64.
-  uint128 div;
-  int div_base_log;
-  switch (flags & std::ios::basefield) {
-    case std::ios::hex:
-      div = 0x1000000000000000;  // 16^15
-      div_base_log = 15;
-      break;
-    case std::ios::oct:
-      div = 01000000000000000000000;  // 8^21
-      div_base_log = 21;
-      break;
-    default:  // std::ios::dec
-      div = 10000000000000000000u;  // 10^19
-      div_base_log = 19;
-      break;
-  }
-
-  // Now piece together the uint128 representation from three chunks of the
-  // original value, each less than "div" and therefore representable as a
-  // uint64_t.
-  std::ostringstream os;
-  std::ios_base::fmtflags copy_mask =
-      std::ios::basefield | std::ios::showbase | std::ios::uppercase;
-  os.setf(flags & copy_mask, copy_mask);
-  uint128 high = v;
-  uint128 low;
-  DivModImpl(high, div, &high, &low);
-  uint128 mid;
-  DivModImpl(high, div, &high, &mid);
-  if (Uint128Low64(high) != 0) {
-    os << Uint128Low64(high);
-    os << std::noshowbase << std::setfill('0') << std::setw(div_base_log);
-    os << Uint128Low64(mid);
-    os << std::setw(div_base_log);
-  } else if (Uint128Low64(mid) != 0) {
-    os << Uint128Low64(mid);
-    os << std::noshowbase << std::setfill('0') << std::setw(div_base_log);
-  }
-  os << Uint128Low64(low);
-  return os.str();
-}
-
-}  // namespace
-
-std::ostream& operator<<(std::ostream& os, uint128 v) {
-  std::ios_base::fmtflags flags = os.flags();
-  std::string rep = Uint128ToFormattedString(v, flags);
-
-  // Add the requisite padding.
-  std::streamsize width = os.width(0);
-  if (static_cast<size_t>(width) > rep.size()) {
-    std::ios::fmtflags adjustfield = flags & std::ios::adjustfield;
-    if (adjustfield == std::ios::left) {
-      rep.append(width - rep.size(), os.fill());
-    } else if (adjustfield == std::ios::internal &&
-               (flags & std::ios::showbase) &&
-               (flags & std::ios::basefield) == std::ios::hex && v != 0) {
-      rep.insert(2, width - rep.size(), os.fill());
-    } else {
-      rep.insert(0, width - rep.size(), os.fill());
-    }
-  }
-
-  return os << rep;
-}
-
-namespace {
-
-uint128 UnsignedAbsoluteValue(int128 v) {
-  // Cast to uint128 before possibly negating because -Int128Min() is undefined.
-  return Int128High64(v) < 0 ? -uint128(v) : uint128(v);
-}
-
-}  // namespace
-
-#if !defined(ABSL_HAVE_INTRINSIC_INT128)
-namespace {
-
-template <typename T>
-int128 MakeInt128FromFloat(T v) {
-  // Conversion when v is NaN or cannot fit into int128 would be undefined
-  // behavior if using an intrinsic 128-bit integer.
-  assert(std::isfinite(v) && (std::numeric_limits<T>::max_exponent <= 127 ||
-                              (v >= -std::ldexp(static_cast<T>(1), 127) &&
-                               v < std::ldexp(static_cast<T>(1), 127))));
-
-  // We must convert the absolute value and then negate as needed, because
-  // floating point types are typically sign-magnitude. Otherwise, the
-  // difference between the high and low 64 bits when interpreted as two's
-  // complement overwhelms the precision of the mantissa.
-  uint128 result = v < 0 ? -MakeUint128FromFloat(-v) : MakeUint128FromFloat(v);
-  return MakeInt128(int128_internal::BitCastToSigned(Uint128High64(result)),
-                    Uint128Low64(result));
-}
-
-}  // namespace
-
-int128::int128(float v) : int128(MakeInt128FromFloat(v)) {}
-int128::int128(double v) : int128(MakeInt128FromFloat(v)) {}
-int128::int128(long double v) : int128(MakeInt128FromFloat(v)) {}
-
-int128 operator/(int128 lhs, int128 rhs) {
-  assert(lhs != Int128Min() || rhs != -1);  // UB on two's complement.
-
-  uint128 quotient = 0;
-  uint128 remainder = 0;
-  DivModImpl(UnsignedAbsoluteValue(lhs), UnsignedAbsoluteValue(rhs),
-             &quotient, &remainder);
-  if ((Int128High64(lhs) < 0) != (Int128High64(rhs) < 0)) quotient = -quotient;
-  return MakeInt128(int128_internal::BitCastToSigned(Uint128High64(quotient)),
-                    Uint128Low64(quotient));
-}
-
-int128 operator%(int128 lhs, int128 rhs) {
-  assert(lhs != Int128Min() || rhs != -1);  // UB on two's complement.
-
-  uint128 quotient = 0;
-  uint128 remainder = 0;
-  DivModImpl(UnsignedAbsoluteValue(lhs), UnsignedAbsoluteValue(rhs),
-             &quotient, &remainder);
-  if (Int128High64(lhs) < 0) remainder = -remainder;
-  return MakeInt128(int128_internal::BitCastToSigned(Uint128High64(remainder)),
-                    Uint128Low64(remainder));
-}
-#endif  // ABSL_HAVE_INTRINSIC_INT128
-
-std::ostream& operator<<(std::ostream& os, int128 v) {
-  std::ios_base::fmtflags flags = os.flags();
-  std::string rep;
-
-  // Add the sign if needed.
-  bool print_as_decimal =
-      (flags & std::ios::basefield) == std::ios::dec ||
-      (flags & std::ios::basefield) == std::ios_base::fmtflags();
-  if (print_as_decimal) {
-    if (Int128High64(v) < 0) {
-      rep = "-";
-    } else if (flags & std::ios::showpos) {
-      rep = "+";
-    }
-  }
-
-  rep.append(Uint128ToFormattedString(
-      print_as_decimal ? UnsignedAbsoluteValue(v) : uint128(v), os.flags()));
-
-  // Add the requisite padding.
-  std::streamsize width = os.width(0);
-  if (static_cast<size_t>(width) > rep.size()) {
-    switch (flags & std::ios::adjustfield) {
-      case std::ios::left:
-        rep.append(width - rep.size(), os.fill());
-        break;
-      case std::ios::internal:
-        if (print_as_decimal && (rep[0] == '+' || rep[0] == '-')) {
-          rep.insert(1, width - rep.size(), os.fill());
-        } else if ((flags & std::ios::basefield) == std::ios::hex &&
-                   (flags & std::ios::showbase) && v != 0) {
-          rep.insert(2, width - rep.size(), os.fill());
-        } else {
-          rep.insert(0, width - rep.size(), os.fill());
-        }
-        break;
-      default:  // std::ios::right
-        rep.insert(0, width - rep.size(), os.fill());
-        break;
-    }
-  }
-
-  return os << rep;
-}
-
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-namespace std {
-constexpr bool numeric_limits<absl::uint128>::is_specialized;
-constexpr bool numeric_limits<absl::uint128>::is_signed;
-constexpr bool numeric_limits<absl::uint128>::is_integer;
-constexpr bool numeric_limits<absl::uint128>::is_exact;
-constexpr bool numeric_limits<absl::uint128>::has_infinity;
-constexpr bool numeric_limits<absl::uint128>::has_quiet_NaN;
-constexpr bool numeric_limits<absl::uint128>::has_signaling_NaN;
-constexpr float_denorm_style numeric_limits<absl::uint128>::has_denorm;
-constexpr bool numeric_limits<absl::uint128>::has_denorm_loss;
-constexpr float_round_style numeric_limits<absl::uint128>::round_style;
-constexpr bool numeric_limits<absl::uint128>::is_iec559;
-constexpr bool numeric_limits<absl::uint128>::is_bounded;
-constexpr bool numeric_limits<absl::uint128>::is_modulo;
-constexpr int numeric_limits<absl::uint128>::digits;
-constexpr int numeric_limits<absl::uint128>::digits10;
-constexpr int numeric_limits<absl::uint128>::max_digits10;
-constexpr int numeric_limits<absl::uint128>::radix;
-constexpr int numeric_limits<absl::uint128>::min_exponent;
-constexpr int numeric_limits<absl::uint128>::min_exponent10;
-constexpr int numeric_limits<absl::uint128>::max_exponent;
-constexpr int numeric_limits<absl::uint128>::max_exponent10;
-constexpr bool numeric_limits<absl::uint128>::traps;
-constexpr bool numeric_limits<absl::uint128>::tinyness_before;
-
-constexpr bool numeric_limits<absl::int128>::is_specialized;
-constexpr bool numeric_limits<absl::int128>::is_signed;
-constexpr bool numeric_limits<absl::int128>::is_integer;
-constexpr bool numeric_limits<absl::int128>::is_exact;
-constexpr bool numeric_limits<absl::int128>::has_infinity;
-constexpr bool numeric_limits<absl::int128>::has_quiet_NaN;
-constexpr bool numeric_limits<absl::int128>::has_signaling_NaN;
-constexpr float_denorm_style numeric_limits<absl::int128>::has_denorm;
-constexpr bool numeric_limits<absl::int128>::has_denorm_loss;
-constexpr float_round_style numeric_limits<absl::int128>::round_style;
-constexpr bool numeric_limits<absl::int128>::is_iec559;
-constexpr bool numeric_limits<absl::int128>::is_bounded;
-constexpr bool numeric_limits<absl::int128>::is_modulo;
-constexpr int numeric_limits<absl::int128>::digits;
-constexpr int numeric_limits<absl::int128>::digits10;
-constexpr int numeric_limits<absl::int128>::max_digits10;
-constexpr int numeric_limits<absl::int128>::radix;
-constexpr int numeric_limits<absl::int128>::min_exponent;
-constexpr int numeric_limits<absl::int128>::min_exponent10;
-constexpr int numeric_limits<absl::int128>::max_exponent;
-constexpr int numeric_limits<absl::int128>::max_exponent10;
-constexpr bool numeric_limits<absl::int128>::traps;
-constexpr bool numeric_limits<absl::int128>::tinyness_before;
-}  // namespace std