Function strcasecmp

src/string.cpp:287–296

int strcasecmp(const char* s1, const char* s2) {
	for (size_t i = 0; s1[i] || s2[i]; i++) {
		// Cast [-128, -1] char to [128, 255] because negative ints are undefined
		int c1 = std::tolower((unsigned char) s1[i]);
		int c2 = std::tolower((unsigned char) s2[i]);
		if (c1 != c2)
			return c1 - c2;
	}
	return 0;
}


bool CaseInsensitiveCompare::operator()(const std::string& a, const std::string& b) const {