Testing CStrings for equality, ignoring case.

#include <locale>
 
template<class CharT>
int strncasecmp(const CharT* s1, const CharT* s2, std::size_t size, const std::locale& loc = std::cout.getloc()) {
	const std::ctype<CharT>& type = std::use_facet<std::ctype<CharT> > (loc);
	int result;
 
	while (size-- > 0 && ( result = type.tolower(*s1) - type.tolower(*s2) ) == 0 && *s1)
		;
 
	return result;
}
 
template<class CharT>
int strcasecmp(const CharT* s1, const CharT* s2, const std::locale& loc = std::cout.getloc()) {
	const std::ctype<CharT>& type = std::use_facet<std::ctype<CharT> > (loc);
	int result;
 
	while (( result = type.tolower(*(s1++)) - type.tolower(*(s2++)) ) == 0 && *s1)
		;
 
	return result;
}