Changes imported from Abseil "staging" branch:

  - 43853019b439efb32c79d5d50e24508588e1bbe0 Undo the not applying qualifications to absl types in enc... by Derek Mauro <dmauro@google.com>
  - 06d62a10621c9864279ee57097069cfe3cb7b42a fix capitalization by Abseil Team <absl-team@google.com>
  - 22adbfee340bb452ba38b68975ade6f072859c4a Fix indices in str_split.h comments. by Derek Mauro <dmauro@google.com>
  - ae5143a559ad8633a78cd76620e30a781006d088 Fix the inconsistent licenses directives in the BUILD fil... by Derek Mauro <dmauro@google.com>
  - 0a76a3653b2ecfdad433d3e2f5b651c4ecdcf74b Remove strip.cc, fastmem.h, and fastmem_test.cc from the ... by Derek Mauro <dmauro@google.com>
  - 77908cfce5927aabca1f8d62481106f22cfc1936 Internal change. by Derek Mauro <dmauro@google.com>
  - d3277b4171f37e22ab346becb5e295c36c7a0219 Be consistent in (not) applying qualifications for enclos... by Abseil Team <absl-team@google.com>
  - 9ec7f8164e7d6a5f64288a7360a346628393cc50 Add std:: qualification to isnan and isinf in duration_te... by Derek Mauro <dmauro@google.com>
  - 9f7c87d7764ddba05286fabca1f4f15285f3250a Fix typos in string_view comments. by Abseil Team <absl-team@google.com>
  - 281860804f8053143d969b99876e3dbc6deb1236 Fix typo in container.h docs. by Abseil Team <absl-team@google.com>
  - 0b0a9388c7a9d7f72349d44b5b46132f45bde56c Add bazel-* symlinks to gitignore. by Michael Pratt <mpratt@google.com>

GitOrigin-RevId: 43853019b439efb32c79d5d50e24508588e1bbe0
Change-Id: I9e74a5430816a34ecf1acb86486ed3b0bd12a1d6

1 files changed, 0 insertions, 215 deletions

diff --git a/absl/strings/internal/fastmem.h b/absl/strings/internal/fastmem.h
deleted file mode 100644
index 9989b12e34d3..000000000000
--- a/absl/strings/internal/fastmem.h
+++ /dev/null
@@ -1,215 +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
-//
-//      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.
-//
-// Fast memory copying and comparison routines.
-//   strings::fastmemcmp_inlined() replaces memcmp()
-//   strings::memcpy_inlined() replaces memcpy()
-//   strings::memeq(a, b, n) replaces memcmp(a, b, n) == 0
-//
-// strings::*_inlined() routines are inline versions of the
-// routines exported by this module.  Sometimes using the inlined
-// versions is faster.  Measure before using the inlined versions.
-//
-
-#ifndef ABSL_STRINGS_INTERNAL_FASTMEM_H_
-#define ABSL_STRINGS_INTERNAL_FASTMEM_H_
-
-#ifdef __SSE4_1__
-#include <immintrin.h>
-#endif
-#include <cstddef>
-#include <cstdint>
-#include <cstdio>
-#include <cstring>
-
-#include "absl/base/internal/unaligned_access.h"
-#include "absl/base/macros.h"
-#include "absl/base/port.h"
-
-namespace absl {
-namespace strings_internal {
-
-// Return true if the n bytes at a equal the n bytes at b.
-// The regions are allowed to overlap.
-//
-// The performance is similar to the performance of memcmp(), but faster for
-// moderately-sized inputs, or inputs that share a common prefix and differ
-// somewhere in their last 8 bytes. Further optimizations can be added later
-// if it makes sense to do so.  Alternatively, if the compiler & runtime improve
-// to eliminate the need for this, we can remove it.
-inline bool memeq(const char* a, const char* b, size_t n) {
-  size_t n_rounded_down = n & ~static_cast<size_t>(7);
-  if (ABSL_PREDICT_FALSE(n_rounded_down == 0)) {  // n <= 7
-    return memcmp(a, b, n) == 0;
-  }
-  // n >= 8
-  {
-    uint64_t u =
-        ABSL_INTERNAL_UNALIGNED_LOAD64(a) ^ ABSL_INTERNAL_UNALIGNED_LOAD64(b);
-    uint64_t v = ABSL_INTERNAL_UNALIGNED_LOAD64(a + n - 8) ^
-                 ABSL_INTERNAL_UNALIGNED_LOAD64(b + n - 8);
-    if ((u | v) != 0) {  // The first or last 8 bytes differ.
-      return false;
-    }
-  }
-  // The next line forces n to be a multiple of 8.
-  n = n_rounded_down;
-  if (n >= 80) {
-    // In 2013 or later, this should be fast on long strings.
-    return memcmp(a, b, n) == 0;
-  }
-  // Now force n to be a multiple of 16.  Arguably, a "switch" would be smart
-  // here, but there's a difficult-to-evaluate code size vs. speed issue.  The
-  // current approach often re-compares some bytes (worst case is if n initially
-  // was 16, 32, 48, or 64), but is fairly short.
-  size_t e = n & 8;
-  a += e;
-  b += e;
-  n -= e;
-  // n is now in {0, 16, 32, ...}.  Process 0 or more 16-byte chunks.
-  while (n > 0) {
-#ifdef __SSE4_1__
-    __m128i u =
-        _mm_xor_si128(_mm_loadu_si128(reinterpret_cast<const __m128i*>(a)),
-                      _mm_loadu_si128(reinterpret_cast<const __m128i*>(b)));
-    if (!_mm_test_all_zeros(u, u)) {
-      return false;
-    }
-#else
-    uint64_t x =
-        ABSL_INTERNAL_UNALIGNED_LOAD64(a) ^ ABSL_INTERNAL_UNALIGNED_LOAD64(b);
-    uint64_t y = ABSL_INTERNAL_UNALIGNED_LOAD64(a + 8) ^
-                 ABSL_INTERNAL_UNALIGNED_LOAD64(b + 8);
-    if ((x | y) != 0) {
-      return false;
-    }
-#endif
-    a += 16;
-    b += 16;
-    n -= 16;
-  }
-  return true;
-}
-
-inline int fastmemcmp_inlined(const void* va, const void* vb, size_t n) {
-  const unsigned char* pa = static_cast<const unsigned char*>(va);
-  const unsigned char* pb = static_cast<const unsigned char*>(vb);
-  switch (n) {
-    default:
-      return memcmp(va, vb, n);
-    case 7:
-      if (*pa != *pb) return *pa < *pb ? -1 : +1;
-      ++pa;
-      ++pb;
-      ABSL_FALLTHROUGH_INTENDED;
-    case 6:
-      if (*pa != *pb) return *pa < *pb ? -1 : +1;
-      ++pa;
-      ++pb;
-      ABSL_FALLTHROUGH_INTENDED;
-    case 5:
-      if (*pa != *pb) return *pa < *pb ? -1 : +1;
-      ++pa;
-      ++pb;
-      ABSL_FALLTHROUGH_INTENDED;
-    case 4:
-      if (*pa != *pb) return *pa < *pb ? -1 : +1;
-      ++pa;
-      ++pb;
-      ABSL_FALLTHROUGH_INTENDED;
-    case 3:
-      if (*pa != *pb) return *pa < *pb ? -1 : +1;
-      ++pa;
-      ++pb;
-      ABSL_FALLTHROUGH_INTENDED;
-    case 2:
-      if (*pa != *pb) return *pa < *pb ? -1 : +1;
-      ++pa;
-      ++pb;
-      ABSL_FALLTHROUGH_INTENDED;
-    case 1:
-      if (*pa != *pb) return *pa < *pb ? -1 : +1;
-      ABSL_FALLTHROUGH_INTENDED;
-    case 0:
-      break;
-  }
-  return 0;
-}
-
-// The standard memcpy operation is slow for variable small sizes.
-// This implementation inlines the optimal realization for sizes 1 to 16.
-// To avoid code bloat don't use it in case of not performance-critical spots,
-// nor when you don't expect very frequent values of size <= 16.
-inline void memcpy_inlined(char* dst, const char* src, size_t size) {
-  // Compiler inlines code with minimal amount of data movement when third
-  // parameter of memcpy is a constant.
-  switch (size) {
-    case 1:
-      memcpy(dst, src, 1);
-      break;
-    case 2:
-      memcpy(dst, src, 2);
-      break;
-    case 3:
-      memcpy(dst, src, 3);
-      break;
-    case 4:
-      memcpy(dst, src, 4);
-      break;
-    case 5:
-      memcpy(dst, src, 5);
-      break;
-    case 6:
-      memcpy(dst, src, 6);
-      break;
-    case 7:
-      memcpy(dst, src, 7);
-      break;
-    case 8:
-      memcpy(dst, src, 8);
-      break;
-    case 9:
-      memcpy(dst, src, 9);
-      break;
-    case 10:
-      memcpy(dst, src, 10);
-      break;
-    case 11:
-      memcpy(dst, src, 11);
-      break;
-    case 12:
-      memcpy(dst, src, 12);
-      break;
-    case 13:
-      memcpy(dst, src, 13);
-      break;
-    case 14:
-      memcpy(dst, src, 14);
-      break;
-    case 15:
-      memcpy(dst, src, 15);
-      break;
-    case 16:
-      memcpy(dst, src, 16);
-      break;
-    default:
-      memcpy(dst, src, size);
-      break;
-  }
-}
-
-}  // namespace strings_internal
-}  // namespace absl
-
-#endif  // ABSL_STRINGS_INTERNAL_FASTMEM_H_