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, 143 deletions

diff --git a/third_party/abseil_cpp/absl/random/internal/gaussian_distribution_gentables.cc b/third_party/abseil_cpp/absl/random/internal/gaussian_distribution_gentables.cc
deleted file mode 100644
index a95333d55f..0000000000
--- a/third_party/abseil_cpp/absl/random/internal/gaussian_distribution_gentables.cc
+++ /dev/null
@@ -1,143 +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.
-
-// Generates gaussian_distribution.cc
-//
-// $ blaze run :gaussian_distribution_gentables > gaussian_distribution.cc
-//
-#include "absl/random/gaussian_distribution.h"
-
-#include <cmath>
-#include <cstddef>
-#include <iostream>
-#include <limits>
-#include <string>
-
-#include "absl/base/macros.h"
-
-namespace absl {
-ABSL_NAMESPACE_BEGIN
-namespace random_internal {
-namespace {
-
-template <typename T, size_t N>
-void FormatArrayContents(std::ostream* os, T (&data)[N]) {
-  if (!std::numeric_limits<T>::is_exact) {
-    // Note: T is either an integer or a float.
-    // float requires higher precision to ensure that values are
-    // reproduced exactly.
-    // Trivia: C99 has hexadecimal floating point literals, but C++11 does not.
-    // Using them would remove all concern of precision loss.
-    os->precision(std::numeric_limits<T>::max_digits10 + 2);
-  }
-  *os << "    {";
-  std::string separator = "";
-  for (size_t i = 0; i < N; ++i) {
-    *os << separator << data[i];
-    if ((i + 1) % 3 != 0) {
-      separator = ", ";
-    } else {
-      separator = ",\n     ";
-    }
-  }
-  *os << "}";
-}
-
-}  // namespace
-
-class TableGenerator : public gaussian_distribution_base {
- public:
-  TableGenerator();
-  void Print(std::ostream* os);
-
-  using gaussian_distribution_base::kMask;
-  using gaussian_distribution_base::kR;
-  using gaussian_distribution_base::kV;
-
- private:
-  Tables tables_;
-};
-
-// Ziggurat gaussian initialization.  For an explanation of the algorithm, see
-// the Marsaglia paper, "The Ziggurat Method for Generating Random Variables".
-//   http://www.jstatsoft.org/v05/i08/
-//
-// Further details are available in the Doornik paper
-//   https://www.doornik.com/research/ziggurat.pdf
-//
-TableGenerator::TableGenerator() {
-  // The constants here should match the values in gaussian_distribution.h
-  static constexpr int kC = kMask + 1;
-
-  static_assert((ABSL_ARRAYSIZE(tables_.x) == kC + 1),
-                "xArray must be length kMask + 2");
-
-  static_assert((ABSL_ARRAYSIZE(tables_.x) == ABSL_ARRAYSIZE(tables_.f)),
-                "fx and x arrays must be identical length");
-
-  auto f = [](double x) { return std::exp(-0.5 * x * x); };
-  auto f_inv = [](double x) { return std::sqrt(-2.0 * std::log(x)); };
-
-  tables_.x[0] = kV / f(kR);
-  tables_.f[0] = f(tables_.x[0]);
-
-  tables_.x[1] = kR;
-  tables_.f[1] = f(tables_.x[1]);
-
-  tables_.x[kC] = 0.0;
-  tables_.f[kC] = f(tables_.x[kC]);  // 1.0
-
-  for (int i = 2; i < kC; i++) {
-    double v = (kV / tables_.x[i - 1]) + tables_.f[i - 1];
-    tables_.x[i] = f_inv(v);
-    tables_.f[i] = v;
-  }
-}
-
-void TableGenerator::Print(std::ostream* os) {
-  *os << "// BEGIN GENERATED CODE; DO NOT EDIT\n"
-         "// clang-format off\n"
-         "\n"
-         "#include \"absl/random/gaussian_distribution.h\"\n"
-         "\n"
-         "namespace absl {\n"
-         "ABSL_NAMESPACE_BEGIN\n"
-         "namespace random_internal {\n"
-         "\n"
-         "const gaussian_distribution_base::Tables\n"
-         "    gaussian_distribution_base::zg_ = {\n";
-  FormatArrayContents(os, tables_.x);
-  *os << ",\n";
-  FormatArrayContents(os, tables_.f);
-  *os << "};\n"
-         "\n"
-         "}  // namespace random_internal\n"
-         "ABSL_NAMESPACE_END\n"
-         "}  // namespace absl\n"
-         "\n"
-         "// clang-format on\n"
-         "// END GENERATED CODE";
-  *os << std::endl;
-}
-
-}  // namespace random_internal
-ABSL_NAMESPACE_END
-}  // namespace absl
-
-int main(int, char**) {
-  std::cerr << "\nCopy the output to gaussian_distribution.cc" << std::endl;
-  absl::random_internal::TableGenerator generator;
-  generator.Print(&std::cout);
-  return 0;
-}