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diff --git a/src/lib/base/String.h b/src/lib/base/String.h
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+/*
+ * barrier -- mouse and keyboard sharing utility
+ * Copyright (C) 2012-2016 Symless Ltd.
+ * Copyright (C) 2002 Chris Schoeneman
+ * 
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file LICENSE that should have accompanied this file.
+ * 
+ * This package is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "common/common.h"
+#include "common/stdstring.h"
+
+#include <stdarg.h>
+#include <vector>
+
+// use standard C++ string class for our string class
+typedef std::string String;
+
+namespace barrier {
+
+//! String utilities
+/*!
+Provides functions for string manipulation.
+*/
+namespace string {
+
+//! Format positional arguments
+/*!
+Format a string using positional arguments.  fmt has literal
+characters and conversion specifications introduced by `\%':
+- \%\%  -- literal `\%'
+- \%{n} -- positional element n, n a positive integer, {} are literal
+
+All arguments in the variable list are const char*.  Positional
+elements are indexed from 1.
+*/
+String format(const char* fmt, ...);
+
+//! Format positional arguments
+/*!
+Same as format() except takes va_list.
+*/
+String vformat(const char* fmt, va_list);
+
+//! Print a string using sprintf-style formatting
+/*!
+Equivalent to sprintf() except the result is returned as a String.
+*/
+String sprintf(const char* fmt, ...);
+
+//! Find and replace all
+/*!
+Finds \c find inside \c subject and replaces it with \c replace
+*/
+void findReplaceAll(String& subject, const String& find, const String& replace);
+
+//! Remove file extension
+/*!
+Finds the last dot and remove all characters from the dot to the end
+*/
+String removeFileExt(String filename);
+
+//! Convert into hexdecimal
+/*!
+Convert each character in \c subject into hexdecimal form with \c width
+*/
+void toHex(String& subject, int width, const char fill = '0');
+
+//! Convert to all uppercase
+/*!
+Convert each character in \c subject to uppercase
+*/
+void uppercase(String& subject);
+
+//! Remove all specific char in suject
+/*!
+Remove all specific \c c in \c suject
+*/
+void removeChar(String& subject, const char c);
+
+//! Convert a size type to a string
+/*!
+Convert an size type to a string
+*/
+String sizeTypeToString(size_t n);
+
+//! Convert a string to a size type
+/*!
+Convert an a \c string to an size type
+*/
+size_t stringToSizeType(String string);
+
+//! Split a string into substrings
+/*!
+Split a \c string that separated by a \c c into substrings
+*/
+std::vector<String> splitString(String string, const char c);
+
+//! Case-insensitive comparisons
+/*!
+This class provides case-insensitve comparison functions.
+*/
+class CaselessCmp {
+    public:
+    //! Same as less()
+    bool            operator()(const String& a, const String& b) const;
+
+    //! Returns true iff \c a is lexicographically less than \c b
+    static bool        less(const String& a, const String& b);
+
+    //! Returns true iff \c a is lexicographically equal to \c b
+    static bool        equal(const String& a, const String& b);
+
+    //! Returns true iff \c a is lexicographically less than \c b
+    static bool        cmpLess(const String::value_type& a,
+                        const String::value_type& b);
+
+    //! Returns true iff \c a is lexicographically equal to \c b
+    static bool        cmpEqual(const String::value_type& a,
+                        const String::value_type& b);
+};
+
+}
+}