feat(util.string): 添加IsStartWith()与IsEndWith()函数

Author: hevake

modules/util/string.cpp

@@ -273,6 +273,22 @@ std::string ToLower(const std::string &origin_str)
   return target_str;
 }
 
+bool IsStartWith(const std::string &origin_str, const std::string &text)
+{
+    if (origin_str.length() < text.length())
+        return false;
+
+    return origin_str.find(text) == 0;
+}
+
+bool IsEndWith(const std::string &origin_str, const std::string &text)
+{
+    if (origin_str.length() < text.length())
+        return false;
+
+    return origin_str.find(text, (origin_str.length() - text.length())) != std::string::npos;
+}
+
 }
 }
 }

modules/util/string.h

@@ -156,6 +156,22 @@ std::string ToUpper(const std::string &origin_str);
  */
 std::string ToLower(const std::string &origin_str);
 
+/**
+ * \brief   判断字串是否以指定字串开头
+ *
+ * \param origin_str    原始字串
+ * \param text          指定字串
+ */
+bool IsStartWith(const std::string &origin_str, const std::string &text);
+
+/**
+ * \brief   判断字串是否以指定字串结束
+ *
+ * \param origin_str    原始字串
+ * \param text          指定字串
+ */
+bool IsEndWith(const std::string &origin_str, const std::string &text);
+
 }
 }
 }

modules/util/string_test.cpp

@@ -284,3 +284,15 @@ TEST(string, ToLower) {
   EXPECT_EQ(ToLower(""), "");
 }
 
+TEST(string, IsStartWith) {
+  EXPECT_TRUE(IsStartWith("abc.123", "abc"));
+  EXPECT_FALSE(IsStartWith("abc.123", "12"));
+  EXPECT_FALSE(IsStartWith("abc", "abcd"));
+}
+
+TEST(string, IsEndWith) {
+  EXPECT_TRUE(IsEndWith("abc.123", "123"));
+  EXPECT_FALSE(IsEndWith("abc.123", "bc"));
+  EXPECT_FALSE(IsEndWith("abc", "abcd"));
+}
+