Export of internal Abseil changes.

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86b1c997fac1f77b0eacfab788659b5a89a6096e by Abseil Team <absl-team@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 211654320

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299b70e1247df768454a76eb957a184de9706f61 by Chris Kennelly <ckennelly@google.com>:

Avoid creating a misaligned reference to int.

PiperOrigin-RevId: 211505883

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c8fad4357ad0bfb3c5ad197c505509bc087072c9 by Abseil Team <absl-team@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 211458539

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0613feffcd36466c3e53a50758d7e8f17c001dce by Greg Falcon <gfalcon@google.com>:

Refactor a string unit test into a template function for internal purposes.

PiperOrigin-RevId: 211100748
GitOrigin-RevId: 86b1c997fac1f77b0eacfab788659b5a89a6096e
Change-Id: Ic6a932b6c27c6762dcdb3b0127f1e2be782418c1

3 files changed, 16 insertions, 9 deletions

diff --git a/absl/strings/escaping.cc b/absl/strings/escaping.cc
index 6742f446e574..8d8b00b2001c 100644
--- a/absl/strings/escaping.cc
+++ b/absl/strings/escaping.cc
@@ -939,7 +939,8 @@ constexpr char kBase64Chars[] =
 constexpr char kWebSafeBase64Chars[] =
     "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_";
 
-void Base64EscapeInternal(const unsigned char* src, size_t szsrc, std::string* dest,
+template <typename String>
+void Base64EscapeInternal(const unsigned char* src, size_t szsrc, String* dest,
                           bool do_padding, const char* base64_chars) {
   const size_t calc_escaped_size =
       CalculateBase64EscapedLenInternal(szsrc, do_padding);
@@ -951,7 +952,8 @@ void Base64EscapeInternal(const unsigned char* src, size_t szsrc, std::string* d
   dest->erase(escaped_len);
 }
 
-bool Base64UnescapeInternal(const char* src, size_t slen, std::string* dest,
+template <typename String>
+bool Base64UnescapeInternal(const char* src, size_t slen, String* dest,
                             const signed char* unbase64) {
   // Determine the size of the output std::string.  Base64 encodes every 3 bytes into
   // 4 characters.  any leftover chars are added directly for good measure.
diff --git a/absl/strings/escaping_test.cc b/absl/strings/escaping_test.cc
index 3f65ec107f45..9dc27f3f8fa7 100644
--- a/absl/strings/escaping_test.cc
+++ b/absl/strings/escaping_test.cc
@@ -543,18 +543,19 @@ static struct {
     {"abcdefghijklmnopqrstuvwxyz", "YWJjZGVmZ2hpamtsbW5vcHFyc3R1dnd4eXo="},
 };
 
-TEST(Base64, EscapeAndUnescape) {
+template <typename StringType>
+void TestEscapeAndUnescape() {
   // Check the short strings; this tests the math (and boundaries)
   for (const auto& tc : base64_tests) {
-    std::string encoded("this junk should be ignored");
+    StringType encoded("this junk should be ignored");
     absl::Base64Escape(tc.plaintext, &encoded);
     EXPECT_EQ(encoded, tc.cyphertext);
 
-    std::string decoded("this junk should be ignored");
+    StringType decoded("this junk should be ignored");
     EXPECT_TRUE(absl::Base64Unescape(encoded, &decoded));
     EXPECT_EQ(decoded, tc.plaintext);
 
-    std::string websafe(tc.cyphertext);
+    StringType websafe(tc.cyphertext);
     for (int c = 0; c < websafe.size(); ++c) {
       if ('+' == websafe[c]) websafe[c] = '-';
       if ('/' == websafe[c]) websafe[c] = '_';
@@ -576,7 +577,7 @@ TEST(Base64, EscapeAndUnescape) {
 
   // Now try the long strings, this tests the streaming
   for (const auto& tc : absl::strings_internal::base64_strings()) {
-    std::string buffer;
+    StringType buffer;
     absl::WebSafeBase64Escape(tc.plaintext, &buffer);
     EXPECT_EQ(tc.cyphertext, buffer);
   }
@@ -586,7 +587,7 @@ TEST(Base64, EscapeAndUnescape) {
     absl::string_view data_set[] = {"ab-/", absl::string_view("\0bcd", 4),
                                     absl::string_view("abc.\0", 5)};
     for (absl::string_view bad_data : data_set) {
-      std::string buf;
+      StringType buf;
       EXPECT_FALSE(absl::Base64Unescape(bad_data, &buf));
       EXPECT_FALSE(absl::WebSafeBase64Unescape(bad_data, &buf));
       EXPECT_TRUE(buf.empty());
@@ -594,6 +595,10 @@ TEST(Base64, EscapeAndUnescape) {
   }
 }
 
+TEST(Base64, EscapeAndUnescape) {
+  TestEscapeAndUnescape<std::string>();
+}
+
 TEST(Base64, DISABLED_HugeData) {
   const size_t kSize = size_t(3) * 1000 * 1000 * 1000;
   static_assert(kSize % 3 == 0, "kSize must be divisible by 3");
diff --git a/absl/strings/str_format_test.cc b/absl/strings/str_format_test.cc
index fed75fafb5c6..9a6576dc8252 100644
--- a/absl/strings/str_format_test.cc
+++ b/absl/strings/str_format_test.cc
@@ -391,7 +391,7 @@ TEST(StrFormat, BehavesAsDocumented) {
 #endif
 
   // Other conversion
-  int64_t value = 0x7ffdeb6;
+  int64_t value = 0x7ffdeb4;
   auto ptr_value = static_cast<uintptr_t>(value);
   const int& something = *reinterpret_cast<const int*>(ptr_value);
   EXPECT_EQ(StrFormat("%p", &something), StrFormat("0x%x", ptr_value));