From 6decad0b8e7e369bd8215f31a45dd3eae982d2a9 Mon Sep 17 00:00:00 2001
From: Andreas Stöckel <astoecke@techfak.uni-bielefeld.de>
Date: Wed, 21 Jan 2015 01:17:49 +0100
Subject: Some further refactoring -- renamed Scope to ParserScope, got rid of
 parser namespace, added new functionality to RegistryClass, wrote
 documentation, added function for extracting file extensions to Utils

---
 src/core/common/Utils.cpp | 23 +++++++++++++++++++++++
 src/core/common/Utils.hpp | 20 ++++++++++++++++++++
 2 files changed, 43 insertions(+)

(limited to 'src/core/common')

diff --git a/src/core/common/Utils.cpp b/src/core/common/Utils.cpp
index 5fde29c..c8fcdc6 100644
--- a/src/core/common/Utils.cpp
+++ b/src/core/common/Utils.cpp
@@ -17,7 +17,9 @@
 */
 
 #include <algorithm>
+#include <cctype>
 #include <limits>
+#include <string>
 
 #include "Utils.hpp"
 
@@ -74,5 +76,26 @@ std::vector<std::string> Utils::split(const std::string &s, char delim)
 	return res;
 }
 
+std::string Utils::toLower(std::string s)
+{
+	std::transform(s.begin(), s.end(), s.begin(), tolower);
+	return s;
+}
+
+std::string Utils::extractFileExtension(const std::string &filename)
+{
+	size_t n = 0;
+	for (ssize_t i = filename.size() - 1; i >= 0; i--) {
+		if (filename[i] == '/' || filename[i] == '\\') {
+			return std::string{};
+		}
+		if (filename[i] == '.') {
+			return toLower(filename.substr(i + 1, n));
+		}
+		n++;
+	}
+	return std::string{};
+}
+
 }
 
diff --git a/src/core/common/Utils.hpp b/src/core/common/Utils.hpp
index 1f7f142..22e0fd3 100644
--- a/src/core/common/Utils.hpp
+++ b/src/core/common/Utils.hpp
@@ -114,6 +114,26 @@ public:
 	 * @return a vector of strings containing the splitted sub-strings.
 	 */
 	static std::vector<std::string> split(const std::string &s, char delim);
+
+	/**
+	 * Converts the given string to lowercase (only works for ANSI characters).
+	 *
+	 * @param s is the string that should be converted to lowercase.
+	 * @return s in lowercase.
+	 */
+	static std::string toLower(std::string s);
+
+	/**
+	 * Reads the file extension of the given filename.
+	 *
+	 * @param filename is the filename from which the extension should be
+	 * extracted.
+	 * @return the extension, excluding any leading dot. The extension is
+	 * defined as the substring after the last dot in the given string, if the
+	 * dot is after a slash or backslash. The extension is converted to
+	 * lowercase.
+	 */
+	static std::string extractFileExtension(const std::string &filename);
 };
 }
 
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