Method substr

lib_acl_cpp/src/stdlib/string.cpp:1790–1802

}

size_t string::substr(string& out, size_t p /* = 0 */, size_t len /* = 0 */) const
{
	size_t n = LEN(vbf_);
	if (p >= n) {
		return 0;
	}
	n -= p;
	if (len == 0 || len > n) {
		len = n;
	}
	out.append(STR(vbf_) + p, len);
	return n;
}

string& string::base64_encode()
{