blob: 3797c4a5c4b01634b087319c28ee10e37151dadf [file] [log] [blame]
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
// part of "core_patch.dart";
@pragma("vm:entry-point")
class _List<E> extends FixedLengthListBase<E> {
@pragma("vm:exact-result-type", _List)
factory _List(length) native "List_allocate";
E operator [](int index) native "List_getIndexed";
void operator []=(int index, E value) {
_setIndexed(index, value);
}
void _setIndexed(int index, E value) native "List_setIndexed";
@pragma("vm:exact-result-type", "dart:core#_Smi")
int get length native "List_getLength";
List _slice(int start, int count, bool needsTypeArgument) {
if (count <= 64) {
final result = needsTypeArgument ? new _List<E>(count) : new _List(count);
for (int i = 0; i < result.length; i++) {
result[i] = this[start + i];
}
return result;
} else {
return _sliceInternal(start, count, needsTypeArgument);
}
}
List _sliceInternal(int start, int count, bool needsTypeArgument)
native "List_slice";
// List interface.
void setRange(int start, int end, Iterable<E> iterable, [int skipCount = 0]) {
if (start < 0 || start > this.length) {
throw new RangeError.range(start, 0, this.length);
}
if (end < start || end > this.length) {
throw new RangeError.range(end, start, this.length);
}
int length = end - start;
if (length == 0) return;
if (identical(this, iterable)) {
Lists.copy(this, skipCount, this, start, length);
} else if (ClassID.getID(iterable) == ClassID.cidArray) {
final _List<E> iterableAsList = iterable;
Lists.copy(iterableAsList, skipCount, this, start, length);
} else if (iterable is List<E>) {
Lists.copy(iterable, skipCount, this, start, length);
} else {
Iterator it = iterable.iterator;
while (skipCount > 0) {
if (!it.moveNext()) return;
skipCount--;
}
for (int i = start; i < end; i++) {
if (!it.moveNext()) return;
this[i] = it.current;
}
}
}
void setAll(int index, Iterable<E> iterable) {
if (index < 0 || index > this.length) {
throw new RangeError.range(index, 0, this.length, "index");
}
List<E> iterableAsList;
if (identical(this, iterable)) {
iterableAsList = this;
} else if (ClassID.getID(iterable) == ClassID.cidArray) {
iterableAsList = iterable;
} else if (iterable is List<E>) {
iterableAsList = iterable;
} else {
for (var value in iterable) {
this[index++] = value;
}
return;
}
int length = iterableAsList.length;
if (index + length > this.length) {
throw new RangeError.range(index + length, 0, this.length);
}
Lists.copy(iterableAsList, 0, this, index, length);
}
List<E> sublist(int start, [int end]) {
end = RangeError.checkValidRange(start, end, this.length);
int length = end - start;
if (length == 0) return <E>[];
var result = new _GrowableList<E>.withData(_slice(start, length, false));
result._setLength(length);
return result;
}
// Iterable interface.
void forEach(f(E element)) {
final length = this.length;
for (int i = 0; i < length; i++) {
f(this[i]);
}
}
Iterator<E> get iterator {
return new _FixedSizeArrayIterator<E>(this);
}
E get first {
if (length > 0) return this[0];
throw IterableElementError.noElement();
}
E get last {
if (length > 0) return this[length - 1];
throw IterableElementError.noElement();
}
E get single {
if (length == 1) return this[0];
if (length == 0) throw IterableElementError.noElement();
throw IterableElementError.tooMany();
}
List<E> toList({bool growable: true}) {
var length = this.length;
if (length > 0) {
var result = _slice(0, length, !growable);
if (growable) {
result = new _GrowableList<E>.withData(result).._setLength(length);
}
return result;
}
// _GrowableList.withData must not be called with empty list.
return growable ? <E>[] : new List<E>(0);
}
}
// This is essentially the same class as _List, but it does not
// permit any modification of array elements from Dart code. We use
// this class for arrays constructed from Dart array literals.
// TODO(hausner): We should consider the trade-offs between two
// classes (and inline cache misses) versus a field in the native
// implementation (checks when modifying). We should keep watching
// the inline cache misses.
@pragma("vm:entry-point")
class _ImmutableList<E> extends UnmodifiableListBase<E> {
factory _ImmutableList._uninstantiable() {
throw new UnsupportedError(
"ImmutableArray can only be allocated by the VM");
}
factory _ImmutableList._from(List from, int offset, int length)
native "ImmutableList_from";
E operator [](int index) native "List_getIndexed";
@pragma("vm:exact-result-type", "dart:core#_Smi")
int get length native "List_getLength";
List<E> sublist(int start, [int end]) {
end = RangeError.checkValidRange(start, end, this.length);
int length = end - start;
if (length == 0) return <E>[];
List list = new _List(length);
for (int i = 0; i < length; i++) {
list[i] = this[start + i];
}
var result = new _GrowableList<E>.withData(list);
result._setLength(length);
return result;
}
// Collection interface.
void forEach(f(E element)) {
final length = this.length;
for (int i = 0; i < length; i++) {
f(this[i]);
}
}
Iterator<E> get iterator {
return new _FixedSizeArrayIterator<E>(this);
}
E get first {
if (length > 0) return this[0];
throw IterableElementError.noElement();
}
E get last {
if (length > 0) return this[length - 1];
throw IterableElementError.noElement();
}
E get single {
if (length == 1) return this[0];
if (length == 0) throw IterableElementError.noElement();
throw IterableElementError.tooMany();
}
List<E> toList({bool growable: true}) {
var length = this.length;
if (length > 0) {
List list = growable ? new _List(length) : new _List<E>(length);
for (int i = 0; i < length; i++) {
list[i] = this[i];
}
if (!growable) return list;
var result = new _GrowableList<E>.withData(list);
result._setLength(length);
return result;
}
return growable ? <E>[] : new _List<E>(0);
}
}
// Iterator for arrays with fixed size.
class _FixedSizeArrayIterator<E> implements Iterator<E> {
final List<E> _array;
final int _length; // Cache array length for faster access.
int _index;
E _current;
_FixedSizeArrayIterator(List<E> array)
: _array = array,
_length = array.length,
_index = 0 {
assert(array is _List<E> || array is _ImmutableList<E>);
}
E get current => _current;
bool moveNext() {
if (_index >= _length) {
_current = null;
return false;
}
_current = _array[_index];
_index++;
return true;
}
}