[BL] Use boost for case insensitive comparison.

BaseLib/FileTools.cpp

@@ -17,6 +17,7 @@
 
 #include <sys/stat.h>
 #include <boost/filesystem.hpp>
+#include <boost/algorithm/string.hpp>
 
 namespace BaseLib
 {
@@ -116,10 +117,7 @@ std::string getFileExtension(const std::string &path)
 
 bool hasFileExtension(std::string const& extension, std::string const& filename)
 {
-	std::string ext = stringToUpper(extension); // Copy for modification.
-	std::string file_ext = stringToUpper(getFileExtension(filename));
-
-	return ext == file_ext;
+	return boost::iequals(extension, getFileExtension(filename));
 }
 
 std::string copyPathToFileName(const std::string &file_name,

BaseLib/FileTools.h

@@ -129,8 +129,7 @@ std::string getFileExtension(std::string const& filename);
 
 /**
  * Compares filename's extension with query extension. The comparison is case
- * insensitive done by converting to upper case with the std::toupper()
- * function.
+ * insensitive.
  */
 bool hasFileExtension(std::string const& extension,
                       std::string const& filename);

BaseLib/StringTools.cpp

@@ -72,13 +72,6 @@ void simplify(std::string &str)
 	);
 }
 
-std::string stringToUpper(std::string const& str)
-{
-    std::string s = str;
-	std::transform(s.begin(), s.end(), s.begin(), (int(*)(int)) std::toupper);
-    return s;
-}
-
 std::string padLeft(std::string const& str, int maxlen, char ch)
 {
 	std::stringstream ss(str);

BaseLib/StringTools.h

@@ -22,7 +22,6 @@
 #include <sstream>
 #include <fstream>
 #include <iostream>
-#include <ctype.h>
 
 namespace BaseLib {
 
@@ -69,13 +68,6 @@ void trim(std::string &str, char ch=' ');
  */
 void simplify(std::string &str);
 
-/**
- * Returns same string with all characters in upper case.
- *
- * This uses std::toupper() function, and does not care about unicode.
- */
-std::string stringToUpper(std::string const& str);
-
 /**
  * Returns the string which is right aligned with padding on the left.
  */