Export of internal Abseil changes

--
3f99b3ea921adc3607b6f308646db9f893c4d55d by CJ Johnson <johnsoncj@google.com>:

Import of CCTZ from GitHub.

PiperOrigin-RevId: 272051845

--
9a62831d763e39936239ff53460ede42c2a73afb by CJ Johnson <johnsoncj@google.com>:

Fix spelling errors #384

PiperOrigin-RevId: 272015607

--
b9b51815d52cf17e987636d83adea28c262f3f1a by Abseil Team <absl-team@google.com>:

Fix a spelling error

aligment -> alignment

PiperOrigin-RevId: 271629812

--
7965acbe7d7b5de18cfb2f2e5c0c18759313a229 by Abseil Team <absl-team@google.com>:

Internal build system change.

PiperOrigin-RevId: 271476858

--
0b4508cbeff246c76762f80cbf8753a7414e4023 by Abseil Team <absl-team@google.com>:

Internal change

PiperOrigin-RevId: 271450732

--
f8cb1aa2196cf2a5e7a474038519da8024090e7f by Samuel Benzaquen <sbenza@google.com>:

Internal change

PiperOrigin-RevId: 271418668
GitOrigin-RevId: 3f99b3ea921adc3607b6f308646db9f893c4d55d
Change-Id: I8743e60d001d42f24cd7494f106eeb2eb07e6526

3 files changed, 7 insertions, 7 deletions

diff --git a/absl/strings/BUILD.bazel b/absl/strings/BUILD.bazel
index eae75d85..729bdd76 100644
--- a/absl/strings/BUILD.bazel
+++ b/absl/strings/BUILD.bazel
@@ -25,7 +25,7 @@ package(
     features = ["parse_headers"],
 )
 
-licenses(["notice"])  # Apache 2.0
+licenses(["notice"])
 
 cc_library(
     name = "strings",
diff --git a/absl/time/internal/cctz/include/cctz/civil_time.h b/absl/time/internal/cctz/include/cctz/civil_time.h
index 85d0d3ff..19b311bb 100644
--- a/absl/time/internal/cctz/include/cctz/civil_time.h
+++ b/absl/time/internal/cctz/include/cctz/civil_time.h
@@ -150,7 +150,7 @@ namespace cctz {
 //
 // All civil-time types have accessors for all six of the civil-time fields:
 // year, month, day, hour, minute, and second. Recall that fields inferior to
-// the type's aligment will be set to their minimum valid value.
+// the type's alignment will be set to their minimum valid value.
 //
 //   civil_day d(2015, 6, 28);
 //   // d.year() == 2015
diff --git a/absl/time/internal/cctz/src/time_zone_info.cc b/absl/time/internal/cctz/src/time_zone_info.cc
index 9db72e0c..d3e1ae29 100644
--- a/absl/time/internal/cctz/src/time_zone_info.cc
+++ b/absl/time/internal/cctz/src/time_zone_info.cc
@@ -631,11 +631,11 @@ class FileZoneInfoSource : public ZoneInfoSource {
 std::unique_ptr<ZoneInfoSource> FileZoneInfoSource::Open(
     const std::string& name) {
   // Use of the "file:" prefix is intended for testing purposes only.
-  if (name.compare(0, 5, "file:") == 0) return Open(name.substr(5));
+  const std::size_t pos = (name.compare(0, 5, "file:") == 0) ? 5 : 0;
 
   // Map the time-zone name to a path name.
   std::string path;
-  if (name.empty() || name[0] != '/') {
+  if (pos == name.size() || name[pos] != '/') {
     const char* tzdir = "/usr/share/zoneinfo";
     char* tzdir_env = nullptr;
 #if defined(_MSC_VER)
@@ -650,7 +650,7 @@ std::unique_ptr<ZoneInfoSource> FileZoneInfoSource::Open(
     free(tzdir_env);
 #endif
   }
-  path += name;
+  path.append(name, pos, std::string::npos);
 
   // Open the zoneinfo file.
   FILE* fp = FOpen(path.c_str(), "rb");
@@ -680,7 +680,7 @@ class AndroidZoneInfoSource : public FileZoneInfoSource {
 std::unique_ptr<ZoneInfoSource> AndroidZoneInfoSource::Open(
     const std::string& name) {
   // Use of the "file:" prefix is intended for testing purposes only.
-  if (name.compare(0, 5, "file:") == 0) return Open(name.substr(5));
+  const std::size_t pos = (name.compare(0, 5, "file:") == 0) ? 5 : 0;
 
   // See Android's libc/tzcode/bionic.cpp for additional information.
   for (const char* tzdata : {"/data/misc/zoneinfo/current/tzdata",
@@ -709,7 +709,7 @@ std::unique_ptr<ZoneInfoSource> AndroidZoneInfoSource::Open(
       const std::int_fast32_t length = Decode32(ebuf + 44);
       if (start < 0 || length < 0) break;
       ebuf[40] = '\0';  // ensure zone name is NUL terminated
-      if (strcmp(name.c_str(), ebuf) == 0) {
+      if (strcmp(name.c_str() + pos, ebuf) == 0) {
         if (fseek(fp.get(), static_cast<long>(start), SEEK_SET) != 0) break;
         return std::unique_ptr<ZoneInfoSource>(new AndroidZoneInfoSource(
             fp.release(), static_cast<std::size_t>(length), vers));