Export of internal Abseil changes.

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714347c156cfe01575c1830a92bc6dea3030065b by Emma Christie <emmachristie@google.com>:

Release absl::EqualsIgnoreCase

PiperOrigin-RevId: 216243900

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688106e2b9d2924799d597682690851cfba87818 by Abseil Team <absl-team@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 216208373

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53638e4da238b230af0e56dc31b9fb790e708f36 by Emma Christie <emmachristie@google.com>:

Update StartsWithIgnoreCase(), EndsWithIgnoreCase(), and EqualsIgnoreCase() headers to say that these functions only consider ASCII case inputs.

PiperOrigin-RevId: 215930962
GitOrigin-RevId: 714347c156cfe01575c1830a92bc6dea3030065b
Change-Id: I7fb3506234185b1a961e0110c1f8302ffe7228fa

1 files changed, 7 insertions, 0 deletions

diff --git a/absl/strings/match.cc b/absl/strings/match.cc
index 25bd7f0b828b..3d10c57784eb 100644
--- a/absl/strings/match.cc
+++ b/absl/strings/match.cc
@@ -27,6 +27,13 @@ bool CaseEqual(absl::string_view piece1, absl::string_view piece2) {
 }
 }  // namespace
 
+bool EqualsIgnoreCase(absl::string_view piece1, absl::string_view piece2) {
+  return (piece1.size() == piece2.size() &&
+          0 == absl::strings_internal::memcasecmp(piece1.data(), piece2.data(),
+                                                  piece1.size()));
+  // memcasecmp uses absl::ascii_tolower().
+}
+
 bool StartsWithIgnoreCase(absl::string_view text, absl::string_view prefix) {
   return (text.size() >= prefix.size()) &&
          CaseEqual(text.substr(0, prefix.size()), prefix);