Changes imported from Abseil "staging" branch:

- 8dea174f3f4178dd8b428e5cf73c37c4eefeb2ea Minor style changes and reorganization. Add missing copyr... by Alex Strelnikov <strel@google.com>

GitOrigin-RevId: 8dea174f3f4178dd8b428e5cf73c37c4eefeb2ea
Change-Id: I239f9dd6882172790b241f1af7a2acb23d54fb61

absl/numeric/int128.cc

@@ -139,9 +139,9 @@ uint128& uint128::operator%=(uint128 other) {
   return *this;
 }
 
-std::ostream& operator<<(std::ostream& o, uint128 b) {
-  std::ios_base::fmtflags flags = o.flags();
+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;
@@ -160,14 +160,14 @@ std::ostream& operator<<(std::ostream& o, uint128 b) {
       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.
+  // 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 = b;
+  uint128 high = v;
   uint128 low;
   DivModImpl(high, div, &high, &low);
   uint128 mid;
@@ -182,25 +182,31 @@ std::ostream& operator<<(std::ostream& o, uint128 b) {
     os << std::noshowbase << std::setfill('0') << std::setw(div_base_log);
   }
   os << Uint128Low64(low);
-  std::string rep = os.str();
+  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 = o.width(0);
+  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(), o.fill());
+      rep.append(width - rep.size(), os.fill());
     } else if (adjustfield == std::ios::internal &&
                (flags & std::ios::showbase) &&
-               (flags & std::ios::basefield) == std::ios::hex && b != 0) {
-      rep.insert(2, width - rep.size(), o.fill());
+               (flags & std::ios::basefield) == std::ios::hex && v != 0) {
+      rep.insert(2, width - rep.size(), os.fill());
     } else {
-      rep.insert(0, width - rep.size(), o.fill());
+      rep.insert(0, width - rep.size(), os.fill());
     }
   }
 
-  // Stream the final representation in a single "<<" call.
-  return o << rep;
+  return os << rep;
 }
 
 }  // namespace absl

absl/numeric/int128.h

@@ -62,7 +62,7 @@ namespace absl {
 // However, a `uint128` differs from intrinsic integral types in the following
 // ways:
 //
-//   * Errors on implicit conversions that does not preserve value (such as
+//   * Errors on implicit conversions that do not preserve value (such as
 //     loss of precision when converting to float values).
 //   * Requires explicit construction from and conversion to floating point
 //     types.
@@ -175,10 +175,10 @@ class alignas(16) uint128 {
   // Example:
   //
   //   absl::uint128 big = absl::MakeUint128(1, 0);
-  friend constexpr uint128 MakeUint128(uint64_t top, uint64_t bottom);
+  friend constexpr uint128 MakeUint128(uint64_t high, uint64_t low);
 
  private:
-  constexpr uint128(uint64_t top, uint64_t bottom);
+  constexpr uint128(uint64_t high, uint64_t low);
 
   // TODO(strel) Update implementation to use __int128 once all users of
   // uint128 are fixed to not depend on alignof(uint128) == 8. Also add
@@ -198,7 +198,7 @@ class alignas(16) uint128 {
 extern const uint128 kuint128max;
 
 // allow uint128 to be logged
-extern std::ostream& operator<<(std::ostream& o, uint128 b);
+extern std::ostream& operator<<(std::ostream& os, uint128 v);
 
 // TODO(strel) add operator>>(std::istream&, uint128)
 
@@ -208,8 +208,8 @@ extern std::ostream& operator<<(std::ostream& o, uint128 b);
 //                      Implementation details follow
 // --------------------------------------------------------------------------
 
-constexpr uint128 MakeUint128(uint64_t top, uint64_t bottom) {
-  return uint128(top, bottom);
+constexpr uint128 MakeUint128(uint64_t high, uint64_t low) {
+  return uint128(high, low);
 }
 
 // Assignment from integer types.
@@ -287,8 +287,8 @@ constexpr uint64_t Uint128High64(uint128 v) { return v.hi_; }
 
 #if defined(ABSL_IS_LITTLE_ENDIAN)
 
-constexpr uint128::uint128(uint64_t top, uint64_t bottom)
-    : lo_(bottom), hi_(top) {}
+constexpr uint128::uint128(uint64_t high, uint64_t low)
+    : lo_(low), hi_(high) {}
 
 constexpr uint128::uint128(int v)
     : lo_(v), hi_(v < 0 ? std::numeric_limits<uint64_t>::max() : 0) {}
@@ -314,8 +314,8 @@ constexpr uint128::uint128(unsigned __int128 v)
 
 #elif defined(ABSL_IS_BIG_ENDIAN)
 
-constexpr uint128::uint128(uint64_t top, uint64_t bottom)
-    : hi_(top), lo_(bottom) {}
+constexpr uint128::uint128(uint64_t high, uint64_t low)
+    : hi_(high), lo_(low) {}
 
 constexpr uint128::uint128(int v)
     : hi_(v < 0 ? std::numeric_limits<uint64_t>::max() : 0), lo_(v) {}

absl/numeric/int128_have_intrinsic.inc

@@ -1,3 +1,18 @@
-// This file will contain :int128 implementation details that depend on internal
-// representation when ABSL_HAVE_INTRINSIC_INT128 is defined. This file will be
+//
+// 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
+//
+//      http://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.
+
+// This file contains :int128 implementation details that depend on internal
+// representation when ABSL_HAVE_INTRINSIC_INT128 is defined. This file is
 // included by int128.h.

absl/numeric/int128_no_intrinsic.inc

@@ -1,3 +1,18 @@
-// This file will contain :int128 implementation details that depend on internal
+//
+// 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
+//
+//      http://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.
+
+// This file contains :int128 implementation details that depend on internal
 // representation when ABSL_HAVE_INTRINSIC_INT128 is *not* defined. This file
-// will be included by int128.h.
+// is included by int128.h.