Export of internal Abseil changes

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049ac45508e335c6f010f2d28d71016b9fa65b4e by Derek Mauro <dmauro@google.com>:

Fix librt detection

PiperOrigin-RevId: 280207723

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6382c3a9fb2643af9dc031f92ca846c4a78e249c by Andy Getzendanner <durandal@google.com>:

Fix Conan builds

Import of https://github.com/abseil/abseil-cpp/pull/400

PiperOrigin-RevId: 280025424

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aebcd52b1686ac82663a8d0193b60d0122a43372 by Samuel Benzaquen <sbenza@google.com>:

Enable the assertion in the iterator's operator== and operator!=

PiperOrigin-RevId: 279998951

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5b61d909e2159ac6fd45e0e456818db1e725ecd1 by Derek Mauro <dmauro@google.com>:

Add best effort support for compiling much of Abseil with MinGW.
This involves disabling ABSL_ATTRIBUTE_WEAK and adding link flags.

A change to CCTZ is still necessary.

Tests were not run yet, but most of them now build.

PiperOrigin-RevId: 279966541

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4336f8b10cff906e2defdd7d1d449cde4907da5d by Abseil Team <absl-team@google.com>:

Add comments and relax memory orders in base_internal::CallOnceImpl.

Add a comment to document the memory order guarantee if
base_internal::SpinLockWait() is called and returns kOnceDone.

Add a comment for the load/store sequence in base_internal::CallOnceImpl
based on Mike Burrows' explanation.

The atomic load of 'control' in the #ifndef NDEBUG block does not need
std::memory_order_acquire. It can use std::memory_order_relaxed.

The atomic compare_exchange_strong of 'control' does not need
std::memory_order_acquire in the success case. It can use
std::memory_order_relaxed.
PiperOrigin-RevId: 279814155

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407de3a5e9af957cded54a136ca0468bde620d4d by Abseil Team <absl-team@google.com>:

Added a script to generate abseil.podspec from all BUILD.bazel files automatically.

PiperOrigin-RevId: 279811441

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26139497d4a363d6c7bc989c554da593e8819a07 by Derek Mauro <dmauro@google.com>:

Add missing copyright and Apache License to //absl/functional/BUILD.bazel

PiperOrigin-RevId: 279795227

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98ed625b02af6e5834edf52a920d8ca2dab4cd90 by Matt Kulukundis <kfm@google.com>:

Switch the implementation of hashtablez to *only* work on platforms that have a
PER_THREAD_TLS.

The old case is very slow (global mutex) and nobody collects data from that
configuration anyway.

PiperOrigin-RevId: 279775149

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07225900ef672c005c38f467ad3f92f38d0922b3 by Derek Mauro <dmauro@google.com>:

Remove the minumum glibc version check

PiperOrigin-RevId: 279750412

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ec09956a951b4f52228ecc81968b8db7ae19ed15 by Derek Mauro <dmauro@google.com>:

CMake only: link with -lrt to support older glibc versions

PiperOrigin-RevId: 279741661

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97b113fb2e8246f6152c36330ba13793b37154b6 by Xiaoyi Zhang <zhangxy@google.com>:

Internal change.

PiperOrigin-RevId: 279390188

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ca8f72f2721546cc9b01bd01b2ea144962e6e0c5 by Andy Getzendanner <durandal@google.com>:

Expose PutTwoDigits for internal use within Abseil.

PiperOrigin-RevId: 279374239

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14c6384cc03bbdfdefd2e4b635f104af5dd7e026 by Derek Mauro <dmauro@google.com>:

Remove log_severity sources from the base target.
They are already compiled as part of a separate library.

PiperOrigin-RevId: 279372619

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3c5d926c718f8bf394e3bee87b6ba8d94601e0d3 by Abseil Team <absl-team@google.com>:

s/indepdent/independent/g in SimpleAtof's documentation.

PiperOrigin-RevId: 279350836

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de2c44be8a8edf9efa1fe2007cba3564f3e5b0b8 by Abseil Team <absl-team@google.com>:

Internal change

PiperOrigin-RevId: 279346990

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2ba078341423fcf6d0ba5ca1831f86570a26e615 by Samuel Benzaquen <sbenza@google.com>:

Add hash support for std::wstring, std::u16string and std::u32string.

PiperOrigin-RevId: 279320672

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3272d3ffcfa55283a04f90e5868701912da95ef7 by Andy Soffer <asoffer@google.com>:

Removing a bunch of __restricts that amount to no performance differences. One
of these is the cause of https://github.com/abseil/abseil-cpp/issues/396. In
particular, in one of the Vector128Store functions, restricts on two pointers
that were indeed aliased seems to be the root cause of the issues.

Closes #396

PiperOrigin-RevId: 279318999

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342f338ab31cc24344d5de8f28cf455bbb629a17 by Jorg Brown <jorg@google.com>:

Support uint128 in SimpleAtoi

PiperOrigin-RevId: 279234038

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81cb0a04cf2dc4515d303679fc60968712191571 by Derek Mauro <dmauro@google.com>:

Change the check for futex availability to support older Linux systems

PiperOrigin-RevId: 279147079

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cb4ca4aa4c8d2d710a5d483c56c4ce4f979e14b1 by Abseil Team <absl-team@google.com>:

Add IWYU pragma: export for int128 .inc files.

PiperOrigin-RevId: 279107098

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b8df86ef610c366729f07326c726f3e34817b4dd by Abseil Team <absl-team@google.com>:

An optimization for Waiter::Post() in the SEM waiter mode.

Like the FUTEX waiter mode, Waiter::Post() only needs to call Poke() if
it incremented the atomic variable from 0.

PiperOrigin-RevId: 279086133
GitOrigin-RevId: 049ac45508e335c6f010f2d28d71016b9fa65b4e
Change-Id: I4c1a4073fff62cb6a1fcb1c104aa7d62dad588c2

1 files changed, 62 insertions, 1 deletions

diff --git a/absl/strings/numbers_test.cc b/absl/strings/numbers_test.cc
index b92b9a8cb2a8..68229b15a4e2 100644
--- a/absl/strings/numbers_test.cc
+++ b/absl/strings/numbers_test.cc
@@ -249,7 +249,9 @@ TEST(Numbers, TestFastPrints) {
 
 template <typename int_type, typename in_val_type>
 void VerifySimpleAtoiGood(in_val_type in_value, int_type exp_value) {
-  std::string s = absl::StrCat(in_value);
+  std::string s;
+  // uint128 can be streamed but not StrCat'd
+  absl::strings_internal::OStringStream(&s) << in_value;
   int_type x = static_cast<int_type>(~exp_value);
   EXPECT_TRUE(SimpleAtoi(s, &x))
       << "in_value=" << in_value << " s=" << s << " x=" << x;
@@ -325,6 +327,25 @@ TEST(NumbersTest, Atoi) {
   VerifySimpleAtoiGood<uint64_t>(std::numeric_limits<uint64_t>::max(),
                                  std::numeric_limits<uint64_t>::max());
 
+  // SimpleAtoi(absl::string_view, absl::uint128)
+  VerifySimpleAtoiGood<absl::uint128>(0, 0);
+  VerifySimpleAtoiGood<absl::uint128>(42, 42);
+  VerifySimpleAtoiBad<absl::uint128>(-42);
+
+  VerifySimpleAtoiBad<absl::uint128>(std::numeric_limits<int32_t>::min());
+  VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<int32_t>::max(),
+                                      std::numeric_limits<int32_t>::max());
+  VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<uint32_t>::max(),
+                                      std::numeric_limits<uint32_t>::max());
+  VerifySimpleAtoiBad<absl::uint128>(std::numeric_limits<int64_t>::min());
+  VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<int64_t>::max(),
+                                      std::numeric_limits<int64_t>::max());
+  VerifySimpleAtoiGood<absl::uint128>(std::numeric_limits<uint64_t>::max(),
+                                      std::numeric_limits<uint64_t>::max());
+  VerifySimpleAtoiGood<absl::uint128>(
+      std::numeric_limits<absl::uint128>::max(),
+      std::numeric_limits<absl::uint128>::max());
+
   // Some other types
   VerifySimpleAtoiGood<int>(-42, -42);
   VerifySimpleAtoiGood<int32_t>(-42, -42);
@@ -657,6 +678,46 @@ TEST(stringtest, safe_strtou32_random) {
 TEST(stringtest, safe_strtou64_random) {
   test_random_integer_parse_base<uint64_t>(&safe_strtou64_base);
 }
+TEST(stringtest, safe_strtou128_random) {
+  // random number generators don't work for uint128, and
+  // uint128 can be streamed but not StrCat'd, so this code must be custom
+  // implemented for uint128, but is generally the same as what's above.
+  // test_random_integer_parse_base<absl::uint128>(
+  //     &absl::numbers_internal::safe_strtou128_base);
+  using RandomEngine = std::minstd_rand0;
+  using IntType = absl::uint128;
+  constexpr auto parse_func = &absl::numbers_internal::safe_strtou128_base;
+
+  std::random_device rd;
+  RandomEngine rng(rd());
+  std::uniform_int_distribution<uint64_t> random_uint64(
+      std::numeric_limits<uint64_t>::min());
+  std::uniform_int_distribution<int> random_base(2, 35);
+
+  for (size_t i = 0; i < kNumRandomTests; i++) {
+    IntType value = random_uint64(rng);
+    value = (value << 64) + random_uint64(rng);
+    int base = random_base(rng);
+    std::string str_value;
+    EXPECT_TRUE(Itoa<IntType>(value, base, &str_value));
+    IntType parsed_value;
+
+    // Test successful parse
+    EXPECT_TRUE(parse_func(str_value, &parsed_value, base));
+    EXPECT_EQ(parsed_value, value);
+
+    // Test overflow
+    std::string s;
+    absl::strings_internal::OStringStream(&s)
+        << std::numeric_limits<IntType>::max() << value;
+    EXPECT_FALSE(parse_func(s, &parsed_value, base));
+
+    // Test underflow
+    s.clear();
+    absl::strings_internal::OStringStream(&s) << "-" << value;
+    EXPECT_FALSE(parse_func(s, &parsed_value, base));
+  }
+}
 
 TEST(stringtest, safe_strtou32_base) {
   for (int i = 0; strtouint32_test_cases()[i].str != nullptr; ++i) {