Added StrContains, StartsWith, and EndsWith functions to str_util.h.

Marked contains, starts_with, ends_with, and consume StringPiece methods as deprecated.

This will allow tensorflow::StringPiece to be more easily replaced with absl::string_view (once the deprecated methods are removed) as absl::string_view does not contain those methods.

PiperOrigin-RevId: 189355316

1 files changed, 15 insertions, 0 deletions

diff --git a/tensorflow/core/lib/strings/str_util.h b/tensorflow/core/lib/strings/str_util.h
index 44c52850fa..f062eddef8 100644
--- a/tensorflow/core/lib/strings/str_util.h
+++ b/tensorflow/core/lib/strings/str_util.h
@@ -141,6 +141,21 @@ bool SplitAndParseAsInts(StringPiece text, char delim,
 bool SplitAndParseAsFloats(StringPiece text, char delim,
                            std::vector<float>* result);
 
+// StartsWith()
+//
+// Returns whether a given string `text` begins with `prefix`.
+bool StartsWith(StringPiece text, StringPiece prefix);
+
+// EndsWith()
+//
+// Returns whether a given string `text` ends with `suffix`.
+bool EndsWith(StringPiece text, StringPiece suffix);
+
+// StrContains()
+//
+// Returns whether a given string `haystack` contains the substring `needle`.
+bool StrContains(StringPiece haystack, StringPiece needle);
+
 // ------------------------------------------------------------------
 // Implementation details below
 template <typename T>