645 lines
18 KiB
C++
645 lines
18 KiB
C++
/*
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* Copyright (C) 2005 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "Vector"
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#include <string.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <cutils/log.h>
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#include <utils/Errors.h>
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#include <utils/SharedBuffer.h>
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#include <utils/VectorImpl.h>
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/*****************************************************************************/
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namespace android {
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// ----------------------------------------------------------------------------
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const size_t kMinVectorCapacity = 4;
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static inline size_t max(size_t a, size_t b) {
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return a>b ? a : b;
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}
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// ----------------------------------------------------------------------------
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VectorImpl::VectorImpl(size_t itemSize, uint32_t flags)
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: mStorage(0), mCount(0), mFlags(flags), mItemSize(itemSize)
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{
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}
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VectorImpl::VectorImpl(const VectorImpl& rhs)
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: mStorage(rhs.mStorage), mCount(rhs.mCount),
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mFlags(rhs.mFlags), mItemSize(rhs.mItemSize)
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{
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if (mStorage) {
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SharedBuffer::bufferFromData(mStorage)->acquire();
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}
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}
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VectorImpl::~VectorImpl()
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{
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ALOGW_IF(mCount,
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"[%p] subclasses of VectorImpl must call finish_vector()"
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" in their destructor. Leaking %d bytes.",
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this, (int)(mCount*mItemSize));
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// We can't call _do_destroy() here because the vtable is already gone.
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}
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VectorImpl& VectorImpl::operator = (const VectorImpl& rhs)
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{
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LOG_ALWAYS_FATAL_IF(mItemSize != rhs.mItemSize,
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"Vector<> have different types (this=%p, rhs=%p)", this, &rhs);
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if (this != &rhs) {
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release_storage();
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if (rhs.mCount) {
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mStorage = rhs.mStorage;
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mCount = rhs.mCount;
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SharedBuffer::bufferFromData(mStorage)->acquire();
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} else {
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mStorage = 0;
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mCount = 0;
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}
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}
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return *this;
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}
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void* VectorImpl::editArrayImpl()
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{
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if (mStorage) {
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SharedBuffer* sb = SharedBuffer::bufferFromData(mStorage)->attemptEdit();
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if (sb == 0) {
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sb = SharedBuffer::alloc(capacity() * mItemSize);
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if (sb) {
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_do_copy(sb->data(), mStorage, mCount);
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release_storage();
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mStorage = sb->data();
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}
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}
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}
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return mStorage;
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}
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size_t VectorImpl::capacity() const
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{
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if (mStorage) {
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return SharedBuffer::bufferFromData(mStorage)->size() / mItemSize;
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}
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return 0;
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}
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ssize_t VectorImpl::insertVectorAt(const VectorImpl& vector, size_t index)
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{
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return insertArrayAt(vector.arrayImpl(), index, vector.size());
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}
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ssize_t VectorImpl::appendVector(const VectorImpl& vector)
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{
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return insertVectorAt(vector, size());
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}
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ssize_t VectorImpl::insertArrayAt(const void* array, size_t index, size_t length)
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{
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if (index > size())
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return BAD_INDEX;
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void* where = _grow(index, length);
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if (where) {
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_do_copy(where, array, length);
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}
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return where ? index : (ssize_t)NO_MEMORY;
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}
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ssize_t VectorImpl::appendArray(const void* array, size_t length)
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{
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return insertArrayAt(array, size(), length);
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}
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ssize_t VectorImpl::insertAt(size_t index, size_t numItems)
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{
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return insertAt(0, index, numItems);
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}
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ssize_t VectorImpl::insertAt(const void* item, size_t index, size_t numItems)
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{
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if (index > size())
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return BAD_INDEX;
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void* where = _grow(index, numItems);
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if (where) {
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if (item) {
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_do_splat(where, item, numItems);
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} else {
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_do_construct(where, numItems);
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}
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}
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return where ? index : (ssize_t)NO_MEMORY;
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}
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static int sortProxy(const void* lhs, const void* rhs, void* func)
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{
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return (*(VectorImpl::compar_t)func)(lhs, rhs);
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}
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status_t VectorImpl::sort(VectorImpl::compar_t cmp)
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{
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return sort(sortProxy, (void*)cmp);
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}
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status_t VectorImpl::sort(VectorImpl::compar_r_t cmp, void* state)
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{
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// the sort must be stable. we're using insertion sort which
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// is well suited for small and already sorted arrays
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// for big arrays, it could be better to use mergesort
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const ssize_t count = size();
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if (count > 1) {
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void* array = const_cast<void*>(arrayImpl());
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void* temp = 0;
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ssize_t i = 1;
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while (i < count) {
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void* item = reinterpret_cast<char*>(array) + mItemSize*(i);
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void* curr = reinterpret_cast<char*>(array) + mItemSize*(i-1);
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if (cmp(curr, item, state) > 0) {
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if (!temp) {
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// we're going to have to modify the array...
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array = editArrayImpl();
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if (!array) return NO_MEMORY;
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temp = malloc(mItemSize);
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if (!temp) return NO_MEMORY;
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item = reinterpret_cast<char*>(array) + mItemSize*(i);
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curr = reinterpret_cast<char*>(array) + mItemSize*(i-1);
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} else {
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_do_destroy(temp, 1);
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}
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_do_copy(temp, item, 1);
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ssize_t j = i-1;
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void* next = reinterpret_cast<char*>(array) + mItemSize*(i);
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do {
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_do_destroy(next, 1);
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_do_copy(next, curr, 1);
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next = curr;
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--j;
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curr = reinterpret_cast<char*>(array) + mItemSize*(j);
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} while (j>=0 && (cmp(curr, temp, state) > 0));
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_do_destroy(next, 1);
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_do_copy(next, temp, 1);
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}
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i++;
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}
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if (temp) {
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_do_destroy(temp, 1);
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free(temp);
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}
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}
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return NO_ERROR;
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}
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void VectorImpl::pop()
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{
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if (size())
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removeItemsAt(size()-1, 1);
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}
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void VectorImpl::push()
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{
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push(0);
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}
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void VectorImpl::push(const void* item)
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{
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insertAt(item, size());
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}
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ssize_t VectorImpl::add()
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{
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return add(0);
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}
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ssize_t VectorImpl::add(const void* item)
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{
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return insertAt(item, size());
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}
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ssize_t VectorImpl::replaceAt(size_t index)
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{
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return replaceAt(0, index);
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}
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ssize_t VectorImpl::replaceAt(const void* prototype, size_t index)
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{
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ALOG_ASSERT(index<size(),
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"[%p] replace: index=%d, size=%d", this, (int)index, (int)size());
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if (index >= size()) {
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return BAD_INDEX;
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}
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void* item = editItemLocation(index);
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if (item != prototype) {
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if (item == 0)
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return NO_MEMORY;
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_do_destroy(item, 1);
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if (prototype == 0) {
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_do_construct(item, 1);
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} else {
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_do_copy(item, prototype, 1);
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}
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}
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return ssize_t(index);
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}
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ssize_t VectorImpl::removeItemsAt(size_t index, size_t count)
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{
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ALOG_ASSERT((index+count)<=size(),
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"[%p] remove: index=%d, count=%d, size=%d",
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this, (int)index, (int)count, (int)size());
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if ((index+count) > size())
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return BAD_VALUE;
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_shrink(index, count);
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return index;
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}
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void VectorImpl::finish_vector()
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{
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release_storage();
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mStorage = 0;
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mCount = 0;
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}
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void VectorImpl::clear()
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{
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_shrink(0, mCount);
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}
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void* VectorImpl::editItemLocation(size_t index)
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{
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ALOG_ASSERT(index<capacity(),
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"[%p] editItemLocation: index=%d, capacity=%d, count=%d",
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this, (int)index, (int)capacity(), (int)mCount);
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if (index < capacity()) {
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void* buffer = editArrayImpl();
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if (buffer) {
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return reinterpret_cast<char*>(buffer) + index*mItemSize;
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}
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}
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return 0;
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}
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const void* VectorImpl::itemLocation(size_t index) const
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{
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ALOG_ASSERT(index<capacity(),
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"[%p] itemLocation: index=%d, capacity=%d, count=%d",
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this, (int)index, (int)capacity(), (int)mCount);
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if (index < capacity()) {
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const void* buffer = arrayImpl();
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if (buffer) {
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return reinterpret_cast<const char*>(buffer) + index*mItemSize;
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}
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}
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return 0;
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}
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ssize_t VectorImpl::setCapacity(size_t new_capacity)
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{
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size_t current_capacity = capacity();
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ssize_t amount = new_capacity - size();
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if (amount <= 0) {
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// we can't reduce the capacity
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return current_capacity;
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}
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SharedBuffer* sb = SharedBuffer::alloc(new_capacity * mItemSize);
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if (sb) {
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void* array = sb->data();
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_do_copy(array, mStorage, size());
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release_storage();
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mStorage = const_cast<void*>(array);
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} else {
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return NO_MEMORY;
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}
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return new_capacity;
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}
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ssize_t VectorImpl::resize(size_t size) {
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ssize_t result = NO_ERROR;
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if (size > mCount) {
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result = insertAt(mCount, size - mCount);
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} else if (size < mCount) {
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result = removeItemsAt(size, mCount - size);
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}
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return result < 0 ? result : size;
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}
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void VectorImpl::release_storage()
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{
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if (mStorage) {
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const SharedBuffer* sb = SharedBuffer::bufferFromData(mStorage);
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if (sb->release(SharedBuffer::eKeepStorage) == 1) {
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_do_destroy(mStorage, mCount);
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SharedBuffer::dealloc(sb);
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}
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}
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}
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void* VectorImpl::_grow(size_t where, size_t amount)
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{
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// ALOGV("_grow(this=%p, where=%d, amount=%d) count=%d, capacity=%d",
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// this, (int)where, (int)amount, (int)mCount, (int)capacity());
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ALOG_ASSERT(where <= mCount,
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"[%p] _grow: where=%d, amount=%d, count=%d",
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this, (int)where, (int)amount, (int)mCount); // caller already checked
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const size_t new_size = mCount + amount;
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if (capacity() < new_size) {
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const size_t new_capacity = max(kMinVectorCapacity, ((new_size*3)+1)/2);
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// ALOGV("grow vector %p, new_capacity=%d", this, (int)new_capacity);
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if ((mStorage) &&
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(mCount==where) &&
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(mFlags & HAS_TRIVIAL_COPY) &&
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(mFlags & HAS_TRIVIAL_DTOR))
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{
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const SharedBuffer* cur_sb = SharedBuffer::bufferFromData(mStorage);
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SharedBuffer* sb = cur_sb->editResize(new_capacity * mItemSize);
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mStorage = sb->data();
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} else {
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SharedBuffer* sb = SharedBuffer::alloc(new_capacity * mItemSize);
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if (sb) {
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void* array = sb->data();
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if (where != 0) {
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_do_copy(array, mStorage, where);
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}
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if (where != mCount) {
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const void* from = reinterpret_cast<const uint8_t *>(mStorage) + where*mItemSize;
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void* dest = reinterpret_cast<uint8_t *>(array) + (where+amount)*mItemSize;
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_do_copy(dest, from, mCount-where);
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}
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release_storage();
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mStorage = const_cast<void*>(array);
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}
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}
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} else {
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void* array = editArrayImpl();
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if (where != mCount) {
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const void* from = reinterpret_cast<const uint8_t *>(array) + where*mItemSize;
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void* to = reinterpret_cast<uint8_t *>(array) + (where+amount)*mItemSize;
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_do_move_forward(to, from, mCount - where);
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}
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}
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mCount = new_size;
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void* free_space = const_cast<void*>(itemLocation(where));
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return free_space;
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}
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void VectorImpl::_shrink(size_t where, size_t amount)
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{
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if (!mStorage)
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return;
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// ALOGV("_shrink(this=%p, where=%d, amount=%d) count=%d, capacity=%d",
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// this, (int)where, (int)amount, (int)mCount, (int)capacity());
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ALOG_ASSERT(where + amount <= mCount,
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"[%p] _shrink: where=%d, amount=%d, count=%d",
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this, (int)where, (int)amount, (int)mCount); // caller already checked
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const size_t new_size = mCount - amount;
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if (new_size*3 < capacity()) {
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const size_t new_capacity = max(kMinVectorCapacity, new_size*2);
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// ALOGV("shrink vector %p, new_capacity=%d", this, (int)new_capacity);
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if ((where == new_size) &&
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(mFlags & HAS_TRIVIAL_COPY) &&
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(mFlags & HAS_TRIVIAL_DTOR))
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{
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const SharedBuffer* cur_sb = SharedBuffer::bufferFromData(mStorage);
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SharedBuffer* sb = cur_sb->editResize(new_capacity * mItemSize);
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mStorage = sb->data();
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} else {
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SharedBuffer* sb = SharedBuffer::alloc(new_capacity * mItemSize);
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if (sb) {
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void* array = sb->data();
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if (where != 0) {
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_do_copy(array, mStorage, where);
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}
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if (where != new_size) {
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const void* from = reinterpret_cast<const uint8_t *>(mStorage) + (where+amount)*mItemSize;
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void* dest = reinterpret_cast<uint8_t *>(array) + where*mItemSize;
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_do_copy(dest, from, new_size - where);
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}
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release_storage();
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mStorage = const_cast<void*>(array);
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}
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}
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} else {
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void* array = editArrayImpl();
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void* to = reinterpret_cast<uint8_t *>(array) + where*mItemSize;
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_do_destroy(to, amount);
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if (where != new_size) {
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const void* from = reinterpret_cast<uint8_t *>(array) + (where+amount)*mItemSize;
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_do_move_backward(to, from, new_size - where);
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}
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}
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mCount = new_size;
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}
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size_t VectorImpl::itemSize() const {
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return mItemSize;
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}
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void VectorImpl::_do_construct(void* storage, size_t num) const
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{
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if (!(mFlags & HAS_TRIVIAL_CTOR)) {
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do_construct(storage, num);
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}
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}
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void VectorImpl::_do_destroy(void* storage, size_t num) const
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{
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if (!(mFlags & HAS_TRIVIAL_DTOR)) {
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do_destroy(storage, num);
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}
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}
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void VectorImpl::_do_copy(void* dest, const void* from, size_t num) const
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{
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if (!(mFlags & HAS_TRIVIAL_COPY)) {
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do_copy(dest, from, num);
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} else {
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memcpy(dest, from, num*itemSize());
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}
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}
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void VectorImpl::_do_splat(void* dest, const void* item, size_t num) const {
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do_splat(dest, item, num);
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}
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void VectorImpl::_do_move_forward(void* dest, const void* from, size_t num) const {
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do_move_forward(dest, from, num);
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}
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void VectorImpl::_do_move_backward(void* dest, const void* from, size_t num) const {
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do_move_backward(dest, from, num);
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}
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void VectorImpl::reservedVectorImpl1() { }
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void VectorImpl::reservedVectorImpl2() { }
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void VectorImpl::reservedVectorImpl3() { }
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void VectorImpl::reservedVectorImpl4() { }
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void VectorImpl::reservedVectorImpl5() { }
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void VectorImpl::reservedVectorImpl6() { }
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void VectorImpl::reservedVectorImpl7() { }
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void VectorImpl::reservedVectorImpl8() { }
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/*****************************************************************************/
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SortedVectorImpl::SortedVectorImpl(size_t itemSize, uint32_t flags)
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: VectorImpl(itemSize, flags)
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{
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}
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SortedVectorImpl::SortedVectorImpl(const VectorImpl& rhs)
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: VectorImpl(rhs)
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{
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}
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SortedVectorImpl::~SortedVectorImpl()
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{
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}
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SortedVectorImpl& SortedVectorImpl::operator = (const SortedVectorImpl& rhs)
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{
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return static_cast<SortedVectorImpl&>( VectorImpl::operator = (static_cast<const VectorImpl&>(rhs)) );
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}
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|
|
|
ssize_t SortedVectorImpl::indexOf(const void* item) const
|
|
{
|
|
return _indexOrderOf(item);
|
|
}
|
|
|
|
size_t SortedVectorImpl::orderOf(const void* item) const
|
|
{
|
|
size_t o;
|
|
_indexOrderOf(item, &o);
|
|
return o;
|
|
}
|
|
|
|
ssize_t SortedVectorImpl::_indexOrderOf(const void* item, size_t* order) const
|
|
{
|
|
// binary search
|
|
ssize_t err = NAME_NOT_FOUND;
|
|
ssize_t l = 0;
|
|
ssize_t h = size()-1;
|
|
ssize_t mid;
|
|
const void* a = arrayImpl();
|
|
const size_t s = itemSize();
|
|
while (l <= h) {
|
|
mid = l + (h - l)/2;
|
|
const void* const curr = reinterpret_cast<const char *>(a) + (mid*s);
|
|
const int c = do_compare(curr, item);
|
|
if (c == 0) {
|
|
err = l = mid;
|
|
break;
|
|
} else if (c < 0) {
|
|
l = mid + 1;
|
|
} else {
|
|
h = mid - 1;
|
|
}
|
|
}
|
|
if (order) *order = l;
|
|
return err;
|
|
}
|
|
|
|
ssize_t SortedVectorImpl::add(const void* item)
|
|
{
|
|
size_t order;
|
|
ssize_t index = _indexOrderOf(item, &order);
|
|
if (index < 0) {
|
|
index = VectorImpl::insertAt(item, order, 1);
|
|
} else {
|
|
index = VectorImpl::replaceAt(item, index);
|
|
}
|
|
return index;
|
|
}
|
|
|
|
ssize_t SortedVectorImpl::merge(const VectorImpl& vector)
|
|
{
|
|
// naive merge...
|
|
if (!vector.isEmpty()) {
|
|
const void* buffer = vector.arrayImpl();
|
|
const size_t is = itemSize();
|
|
size_t s = vector.size();
|
|
for (size_t i=0 ; i<s ; i++) {
|
|
ssize_t err = add( reinterpret_cast<const char*>(buffer) + i*is );
|
|
if (err<0) {
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
return NO_ERROR;
|
|
}
|
|
|
|
ssize_t SortedVectorImpl::merge(const SortedVectorImpl& vector)
|
|
{
|
|
// we've merging a sorted vector... nice!
|
|
ssize_t err = NO_ERROR;
|
|
if (!vector.isEmpty()) {
|
|
// first take care of the case where the vectors are sorted together
|
|
if (do_compare(vector.itemLocation(vector.size()-1), arrayImpl()) <= 0) {
|
|
err = VectorImpl::insertVectorAt(static_cast<const VectorImpl&>(vector), 0);
|
|
} else if (do_compare(vector.arrayImpl(), itemLocation(size()-1)) >= 0) {
|
|
err = VectorImpl::appendVector(static_cast<const VectorImpl&>(vector));
|
|
} else {
|
|
// this could be made a little better
|
|
err = merge(static_cast<const VectorImpl&>(vector));
|
|
}
|
|
}
|
|
return err;
|
|
}
|
|
|
|
ssize_t SortedVectorImpl::remove(const void* item)
|
|
{
|
|
ssize_t i = indexOf(item);
|
|
if (i>=0) {
|
|
VectorImpl::removeItemsAt(i, 1);
|
|
}
|
|
return i;
|
|
}
|
|
|
|
void SortedVectorImpl::reservedSortedVectorImpl1() { };
|
|
void SortedVectorImpl::reservedSortedVectorImpl2() { };
|
|
void SortedVectorImpl::reservedSortedVectorImpl3() { };
|
|
void SortedVectorImpl::reservedSortedVectorImpl4() { };
|
|
void SortedVectorImpl::reservedSortedVectorImpl5() { };
|
|
void SortedVectorImpl::reservedSortedVectorImpl6() { };
|
|
void SortedVectorImpl::reservedSortedVectorImpl7() { };
|
|
void SortedVectorImpl::reservedSortedVectorImpl8() { };
|
|
|
|
|
|
/*****************************************************************************/
|
|
|
|
}; // namespace android
|
|
|