@Subroutine(value = "string-match")
public static LispObject stringMatch(
Environment environment, LispString regexp, LispString string, @Optional LispInteger start) {
int from = 0;
if (start != null) {
from = start.getData();
if (from < 0 || from >= string.size())
throw new ArgumentOutOfRange(string.toString(), start.toString());
}
LispSymbol s = environment.find("case-fold-search");
int r =
string.match(
environment, regexp, from, (s != null && !s.getValue().equals(LispSymbol.ourNil)));
if (r == -1) return LispSymbol.ourNil;
return new LispInteger(r);
}
@Subroutine("char-to-string")
public static LispString charToString(LispInteger character) {
return new LispString(character.toCharacterString());
}
private static int processBound(LispInteger bound, int length) {
return bound.getData() < 0 ? length + bound.getData() : bound.getData();
}