private RubyArray match_array(Ruby runtime, int start) {
check();
if (regs == null) {
if (start != 0) return runtime.newEmptyArray();
if (begin == -1) {
return runtime.newArray(runtime.getNil());
} else {
RubyString ss = makeShared(runtime, str, begin, end - begin);
if (isTaint()) ss.setTaint(true);
return runtime.newArray(ss);
}
} else {
RubyArray arr = runtime.newArray(regs.numRegs - start);
for (int i = start; i < regs.numRegs; i++) {
if (regs.beg[i] == -1) {
arr.append(runtime.getNil());
} else {
RubyString ss = makeShared(runtime, str, regs.beg[i], regs.end[i] - regs.beg[i]);
if (isTaint()) ss.setTaint(true);
arr.append(ss);
}
}
return arr;
}
}
@JRubyMethod(compat = CompatVersion.RUBY1_8)
public IRubyObject select(ThreadContext context, Block block) {
Ruby runtime = context.getRuntime();
final RubyArray result;
if (regs == null) {
if (begin < 0) return runtime.newEmptyArray();
IRubyObject s = str.substr(runtime, begin, end - begin);
s.setTaint(isTaint());
result = block.yield(context, s).isTrue() ? runtime.newArray(s) : runtime.newEmptyArray();
} else {
result = runtime.newArray();
boolean taint = isTaint();
for (int i = 0; i < regs.numRegs; i++) {
IRubyObject s = str.substr(runtime, regs.beg[i], regs.end[i] - regs.beg[i]);
if (taint) s.setTaint(true);
if (block.yield(context, s).isTrue()) result.append(s);
}
}
return result;
}