ESBase slice(Call eval, int length) throws Throwable {
ESObject obj = eval.getArg(-1).toObject();
ESBase lenObj = obj.getProperty(LENGTH);
int len = lenObj.toInt32();
ESArray array = Global.getGlobalProto().createArray();
if (len <= 0) return array;
int start = 0;
if (length > 0) start = eval.getArg(0).toInt32();
if (start < 0) start += len;
if (start < 0) start = 0;
if (start > len) return array;
int end = len;
if (length > 1) end = eval.getArg(1).toInt32();
if (end < 0) end += len;
if (end < 0) return array;
if (end > len) end = len;
if (start >= end) return array;
for (int i = 0; i < end - start; i++) {
ESBase value = obj.hasProperty(start + i);
if (value != null) array.setProperty(i, value);
}
array.setProperty(LENGTH, ESNumber.create(end - start));
return array;
}
/** Creates the native Array object */
static ESObject create(Global resin) {
Native nativeArray = new NativeArray("Array", NEW, 1);
ESArray proto = new ESArray();
proto.prototype = resin.objProto;
NativeWrapper array = new NativeWrapper(resin, nativeArray, proto, ESThunk.ARRAY_THUNK);
resin.arrayProto = proto;
put(proto, "join", JOIN, 1);
put(proto, "toString", TO_STRING, 0);
put(proto, "reverse", REVERSE, 0);
put(proto, "sort", SORT, 0);
// js1.2
put(proto, "concat", CONCAT, 0);
put(proto, "pop", POP, 0);
put(proto, "push", PUSH, 0);
put(proto, "shift", SHIFT, 0);
put(proto, "unshift", UNSHIFT, 0);
put(proto, "slice", SLICE, 2);
put(proto, "splice", SPLICE, 0);
proto.setClean();
array.setClean();
return array;
}
ESBase concat(Call eval, int length) throws Throwable {
ESArray array = Global.getGlobalProto().createArray();
int k = 0;
for (int i = -1; i < length; i++) {
ESBase arg = eval.getArg(i);
if (arg == esNull || arg == esUndefined || arg == esEmpty) continue;
ESBase arglen = arg.hasProperty(LENGTH);
if (arglen == null) {
array.setProperty(k++, arg);
continue;
}
int len = (int) arglen.toInt32();
if (len < 0) {
array.setProperty(k++, arg);
continue;
}
for (int j = 0; j < len; j++) {
ESBase obj = arg.hasProperty(j);
if (obj != null) array.setProperty(k, obj);
k++;
}
}
array.setProperty(LENGTH, ESNumber.create(k));
return array;
}