feat add StartsWith,EndsWith

src/strings/utils.cc

@@ -65,4 +65,18 @@ TrimRight(const std::string &str, const std::string &chars)
     return str.substr(0, end);
 }
 
+bool
+EndsWith(const std::string &str, const std::string &suffix)
+{
+    return str.size() >= suffix.size()
+        && str.compare(str.size() - suffix.size(), suffix.size(), suffix) == 0;
+}
+
+bool
+StartsWith(const std::string &str, const std::string &prefix)
+{
+    return str.size() >= prefix.size()
+        && str.compare(0, prefix.size(), prefix) == 0;
+}
+
 }// namespace sled