Speed up safe_strtod and safe_strtof functions by using double-conversion library

Closes #12102.

PiperOrigin-RevId: 193696537

1 files changed, 6 insertions, 50 deletions

diff --git a/tensorflow/core/lib/strings/str_util_test.cc b/tensorflow/core/lib/strings/str_util_test.cc
index 63643c3e8e..3bf3e99825 100644
--- a/tensorflow/core/lib/strings/str_util_test.cc
+++ b/tensorflow/core/lib/strings/str_util_test.cc
@@ -430,56 +430,12 @@ TEST(StringReplace, EmptyStringReplaceAll) {
   EXPECT_EQ("", str_util::StringReplace("", "a", "X", /*replace_all=*/true));
 }
 
-TEST(StartsWith, Basic) {
-  const string s1(
-      "123"
-      "\0"
-      "456",
-      7);
-  const StringPiece a("foobar");
-  const StringPiece b(s1);
-  const StringPiece e;
-  EXPECT_TRUE(str_util::StartsWith(a, a));
-  EXPECT_TRUE(str_util::StartsWith(a, "foo"));
-  EXPECT_TRUE(str_util::StartsWith(a, e));
-  EXPECT_TRUE(str_util::StartsWith(b, s1));
-  EXPECT_TRUE(str_util::StartsWith(b, b));
-  EXPECT_TRUE(str_util::StartsWith(b, e));
-  EXPECT_TRUE(str_util::StartsWith(e, ""));
-  EXPECT_FALSE(str_util::StartsWith(a, b));
-  EXPECT_FALSE(str_util::StartsWith(b, a));
-  EXPECT_FALSE(str_util::StartsWith(e, a));
-}
-
-TEST(EndsWith, Basic) {
-  const string s1(
-      "123"
-      "\0"
-      "456",
-      7);
-  const StringPiece a("foobar");
-  const StringPiece b(s1);
-  const StringPiece e;
-  EXPECT_TRUE(str_util::EndsWith(a, a));
-  EXPECT_TRUE(str_util::EndsWith(a, "bar"));
-  EXPECT_TRUE(str_util::EndsWith(a, e));
-  EXPECT_TRUE(str_util::EndsWith(b, s1));
-  EXPECT_TRUE(str_util::EndsWith(b, b));
-  EXPECT_TRUE(str_util::EndsWith(b, e));
-  EXPECT_TRUE(str_util::EndsWith(e, ""));
-  EXPECT_FALSE(str_util::EndsWith(a, b));
-  EXPECT_FALSE(str_util::EndsWith(b, a));
-  EXPECT_FALSE(str_util::EndsWith(e, a));
-}
-
-TEST(StrContains, Basic) {
-  StringPiece a("abcdefg");
-  StringPiece b("abcd");
-  StringPiece c("efg");
-  StringPiece d("gh");
-  EXPECT_TRUE(str_util::StrContains(a, b));
-  EXPECT_TRUE(str_util::StrContains(a, c));
-  EXPECT_TRUE(!str_util::StrContains(a, d));
+TEST(Strnlen, Basic) {
+  EXPECT_EQ(0, str_util::Strnlen("ab", 0));
+  EXPECT_EQ(1, str_util::Strnlen("a", 1));
+  EXPECT_EQ(2, str_util::Strnlen("abcd", 2));
+  EXPECT_EQ(3, str_util::Strnlen("abc", 10));
+  EXPECT_EQ(4, str_util::Strnlen("a \t\n", 10));
 }
 
 }  // namespace tensorflow