From 129ecb49df5bb6f9f7f8779dc4087e2ac6d1d1bd Mon Sep 17 00:00:00 2001
From: Sangwan Kwon <sangwan.kwon@samsung.com>
Date: Tue, 12 May 2020 18:53:30 +0900
Subject: [PATCH] Add string functions (trim, split)

Signed-off-by: Sangwan Kwon <sangwan.kwon@samsung.com>
---
 src/vist/common/tests/string.cpp | 66 ++++++++++++++++++++++++++++++++
 src/vist/string.hpp              | 53 +++++++++++++++++++++++++
 2 files changed, 119 insertions(+)
 create mode 100644 src/vist/common/tests/string.cpp
 create mode 100644 src/vist/string.hpp

diff --git a/src/vist/common/tests/string.cpp b/src/vist/common/tests/string.cpp
new file mode 100644
index 0000000..371d577
--- /dev/null
+++ b/src/vist/common/tests/string.cpp
@@ -0,0 +1,66 @@
+/*
+ *  Copyright (c) 2020 Samsung Electronics Co., Ltd All Rights Reserved
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License
+ */
+
+#include <gtest/gtest.h>
+
+#include <vist/string.hpp>
+
+using namespace vist;
+
+TEST(StringTests, ltrim)
+{
+	std::string str = " a b c ";
+	ltrim(str);
+	EXPECT_EQ(str, "a b c ");
+}
+
+TEST(StringTests, rtrim)
+{
+	std::string str = " a b c ";
+	rtrim(str);
+	EXPECT_EQ(str, " a b c");
+}
+
+TEST(StringTests, trim)
+{
+	std::string str = " a b c ";
+	trim(str);
+	EXPECT_EQ(str, "a b c");
+}
+
+TEST(StringTests, split)
+{
+	std::string origin = "a b c";
+	auto token = split(origin, std::regex("\\s"));
+	if (token.size() == 3) {
+		EXPECT_EQ(token[0], "a");
+		EXPECT_EQ(token[1], "b");
+		EXPECT_EQ(token[2], "c");
+	} else {
+		EXPECT_TRUE(false);
+	}
+
+	origin = "a,b,c";
+	token = split(origin, std::regex(","));
+	EXPECT_EQ(token.size(), 3);
+	if (token.size() == 3) {
+		EXPECT_EQ(token[0], "a");
+		EXPECT_EQ(token[1], "b");
+		EXPECT_EQ(token[2], "c");
+	} else {
+		EXPECT_TRUE(false);
+	}
+}
diff --git a/src/vist/string.hpp b/src/vist/string.hpp
new file mode 100644
index 0000000..42424ae
--- /dev/null
+++ b/src/vist/string.hpp
@@ -0,0 +1,53 @@
+/*
+ *  Copyright (c) 2020 Samsung Electronics Co., Ltd All Rights Reserved
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the language governing permissions and
+ *  limitations under the License
+ */
+
+#pragma once
+
+#include <algorithm>
+#include <cctype>
+#include <locale>
+#include <regex>
+
+namespace vist {
+
+inline void ltrim(std::string& str)
+{
+	str.erase(str.begin(), std::find_if(str.begin(), str.end(), [](int ch) {
+		return !std::isspace(ch);
+	}));
+}
+
+inline void rtrim(std::string& str)
+{
+	str.erase(std::find_if(str.rbegin(), str.rend(), [](int ch) {
+		return !std::isspace(ch);
+	}).base(), str.end());
+}
+
+inline void trim(std::string& str)
+{
+	ltrim(str);
+	rtrim(str);
+}
+
+inline std::vector<std::string> split(const std::string origin, std::regex regex)
+{
+	auto begin = std::sregex_token_iterator(origin.begin(), origin.end(), regex, -1);
+	auto end = std::sregex_token_iterator();
+	return std::vector<std::string>(begin, end);
+}
+
+} // namespace vist
-- 
2.34.1