a6cb0397da
these consume small amount of space (plt) in every library that links against libutils. Change-Id: I1b6b3dd9098aa5a051243f7a5dbf91cd7dcb8b2c
184 lines
7.2 KiB
C++
184 lines
7.2 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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#ifndef ANDROID_VECTOR_IMPL_H
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#define ANDROID_VECTOR_IMPL_H
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#include <assert.h>
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#include <stdint.h>
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#include <sys/types.h>
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#include <utils/Errors.h>
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// ---------------------------------------------------------------------------
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// No user serviceable parts in here...
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// ---------------------------------------------------------------------------
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namespace android {
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/*!
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* Implementation of the guts of the vector<> class
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* this ensures backward binary compatibility and
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* reduces code size.
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* For performance reasons, we expose mStorage and mCount
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* so these fields are set in stone.
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*
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*/
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class VectorImpl
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{
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public:
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enum { // flags passed to the ctor
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HAS_TRIVIAL_CTOR = 0x00000001,
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HAS_TRIVIAL_DTOR = 0x00000002,
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HAS_TRIVIAL_COPY = 0x00000004,
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};
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VectorImpl(size_t itemSize, uint32_t flags);
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VectorImpl(const VectorImpl& rhs);
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virtual ~VectorImpl();
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/*! must be called from subclasses destructor */
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void finish_vector();
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VectorImpl& operator = (const VectorImpl& rhs);
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/*! C-style array access */
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inline const void* arrayImpl() const { return mStorage; }
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void* editArrayImpl();
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/*! vector stats */
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inline size_t size() const { return mCount; }
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inline bool isEmpty() const { return mCount == 0; }
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size_t capacity() const;
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ssize_t setCapacity(size_t size);
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ssize_t resize(size_t size);
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/*! append/insert another vector or array */
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ssize_t insertVectorAt(const VectorImpl& vector, size_t index);
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ssize_t appendVector(const VectorImpl& vector);
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ssize_t insertArrayAt(const void* array, size_t index, size_t length);
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ssize_t appendArray(const void* array, size_t length);
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/*! add/insert/replace items */
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ssize_t insertAt(size_t where, size_t numItems = 1);
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ssize_t insertAt(const void* item, size_t where, size_t numItems = 1);
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void pop();
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void push();
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void push(const void* item);
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ssize_t add();
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ssize_t add(const void* item);
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ssize_t replaceAt(size_t index);
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ssize_t replaceAt(const void* item, size_t index);
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/*! remove items */
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ssize_t removeItemsAt(size_t index, size_t count = 1);
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void clear();
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const void* itemLocation(size_t index) const;
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void* editItemLocation(size_t index);
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typedef int (*compar_t)(const void* lhs, const void* rhs);
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typedef int (*compar_r_t)(const void* lhs, const void* rhs, void* state);
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status_t sort(compar_t cmp);
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status_t sort(compar_r_t cmp, void* state);
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protected:
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size_t itemSize() const;
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void release_storage();
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virtual void do_construct(void* storage, size_t num) const = 0;
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virtual void do_destroy(void* storage, size_t num) const = 0;
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virtual void do_copy(void* dest, const void* from, size_t num) const = 0;
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virtual void do_splat(void* dest, const void* item, size_t num) const = 0;
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virtual void do_move_forward(void* dest, const void* from, size_t num) const = 0;
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virtual void do_move_backward(void* dest, const void* from, size_t num) const = 0;
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private:
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void* _grow(size_t where, size_t amount);
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void _shrink(size_t where, size_t amount);
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inline void _do_construct(void* storage, size_t num) const;
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inline void _do_destroy(void* storage, size_t num) const;
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inline void _do_copy(void* dest, const void* from, size_t num) const;
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inline void _do_splat(void* dest, const void* item, size_t num) const;
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inline void _do_move_forward(void* dest, const void* from, size_t num) const;
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inline void _do_move_backward(void* dest, const void* from, size_t num) const;
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// These 2 fields are exposed in the inlines below,
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// so they're set in stone.
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void * mStorage; // base address of the vector
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size_t mCount; // number of items
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const uint32_t mFlags;
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const size_t mItemSize;
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};
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class SortedVectorImpl : public VectorImpl
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{
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public:
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SortedVectorImpl(size_t itemSize, uint32_t flags);
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SortedVectorImpl(const VectorImpl& rhs);
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virtual ~SortedVectorImpl();
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SortedVectorImpl& operator = (const SortedVectorImpl& rhs);
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//! finds the index of an item
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ssize_t indexOf(const void* item) const;
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//! finds where this item should be inserted
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size_t orderOf(const void* item) const;
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//! add an item in the right place (or replaces it if there is one)
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ssize_t add(const void* item);
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//! merges a vector into this one
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ssize_t merge(const VectorImpl& vector);
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ssize_t merge(const SortedVectorImpl& vector);
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//! removes an item
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ssize_t remove(const void* item);
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protected:
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virtual int do_compare(const void* lhs, const void* rhs) const = 0;
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private:
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ssize_t _indexOrderOf(const void* item, size_t* order = 0) const;
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// these are made private, because they can't be used on a SortedVector
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// (they don't have an implementation either)
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ssize_t add();
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void pop();
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void push();
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void push(const void* item);
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ssize_t insertVectorAt(const VectorImpl& vector, size_t index);
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ssize_t appendVector(const VectorImpl& vector);
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ssize_t insertArrayAt(const void* array, size_t index, size_t length);
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ssize_t appendArray(const void* array, size_t length);
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ssize_t insertAt(size_t where, size_t numItems = 1);
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ssize_t insertAt(const void* item, size_t where, size_t numItems = 1);
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ssize_t replaceAt(size_t index);
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ssize_t replaceAt(const void* item, size_t index);
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};
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}; // namespace android
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// ---------------------------------------------------------------------------
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#endif // ANDROID_VECTOR_IMPL_H
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