Rename utils to string.

src/string.cpp

@@ -0,0 +1,61 @@
+/**
+ * MIT License
+ *
+ * Copyright (c) 2019-2020 EOS Sw/eden
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include <algorithm>
+#include <cctype>
+#include "string.h"
+
+std::vector<std::string> strsplit(const std::string& str, const std::string& delim) {
+
+	std::vector<std::string> r;
+	size_t s = 0, e = 0, dlen = delim.length();
+
+	while((e = str.find(delim, s)) != std::string::npos) {
+		r.push_back(str.substr(s, e - s));
+		s = e + dlen;
+	}
+
+	r.push_back(str.substr(s));
+	return r;
+}
+
+std::string& strtolower(std::string& str) {
+	std::transform(str.begin(), str.end(), str.begin(), [](unsigned char c){ return std::tolower(c); });
+	return str;
+}
+
+std::string& ltrim(std::string& str) {
+	auto it = std::find_if(str.begin(), str.end(), [](char ch){ return !std::isspace(ch); });
+	str.erase(str.begin(), it);
+	return str;
+}
+
+std::string& rtrim(std::string& str) {
+	auto it = std::find_if(str.rbegin(), str.rend(), [](char ch){ return !std::isspace(ch); });
+	str.erase(it.base(), str.end());
+	return str;
+}
+
+std::string& trim(std::string& str) {
+	return ltrim(rtrim(str));
+}