axmol/cocos/base/ccCArray.h

/****************************************************************************
Copyright (c) 2007      Scott Lembcke
Copyright (c) 2010-2012 cocos2d-x.org
Copyright (c) 2013-2016 Chukong Technologies Inc.
Copyright (c) 2017-2018 Xiamen Yaji Software Co., Ltd.

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/**
 @file
 based on Chipmunk cpArray.
 ccArray is a faster alternative to NSMutableArray, it does pretty much the
 same thing (stores NSObjects and retains/releases them appropriately). It's
 faster because:
 - it uses a plain C interface so it doesn't incur Objective-c messaging overhead
 - it assumes you know what you're doing, so it doesn't spend time on safety checks
 (index out of bounds, required capacity etc.)
 - comparisons are done using pointer equality instead of isEqual

 There are 2 kind of functions:
 - ccArray functions that manipulates objective-c objects (retain and release are performed)
 - ccCArray functions that manipulates values like if they were standard C structures (no retain/release is performed)
 */

#ifndef CC_ARRAY_H
#define CC_ARRAY_H
/// @cond DO_NOT_SHOW

#include "base/ccMacros.h"
#include "base/CCRef.h"

#include <stdlib.h>
#include <string.h>
#include <limits.h>

NS_CC_BEGIN

// Easy integration
#define CCARRAYDATA_FOREACH(__array__, __object__) \
    __object__ = __array__->arr[0];                \
    for (ssize_t i = 0, num = __array__->num; i < num; i++, __object__ = __array__->arr[i])

typedef struct _ccArray
{
    ssize_t num, max;
    Ref** arr;
} ccArray;

/** Allocates and initializes a new array with specified capacity */
CC_DLL ccArray* ccArrayNew(ssize_t capacity);

/** Frees array after removing all remaining objects. Silently ignores nil arr. */
CC_DLL void ccArrayFree(ccArray*& arr);

/** Doubles array capacity */
CC_DLL void ccArrayDoubleCapacity(ccArray* arr);

/** Increases array capacity such that max >= num + extra. */
CC_DLL void ccArrayEnsureExtraCapacity(ccArray* arr, ssize_t extra);

/** shrinks the array so the memory footprint corresponds with the number of items */
CC_DLL void ccArrayShrink(ccArray* arr);

/** Returns index of first occurrence of object, NSNotFound if object not found. */
CC_DLL ssize_t ccArrayGetIndexOfObject(ccArray* arr, Ref* object);

/** Returns a Boolean value that indicates whether object is present in array. */
CC_DLL bool ccArrayContainsObject(ccArray* arr, Ref* object);

/** Appends an object. Behavior undefined if array doesn't have enough capacity. */
CC_DLL void ccArrayAppendObject(ccArray* arr, Ref* object);

/** Appends an object. Capacity of arr is increased if needed. */
CC_DLL void ccArrayAppendObjectWithResize(ccArray* arr, Ref* object);

/** Appends objects from plusArr to arr.
 Behavior undefined if arr doesn't have enough capacity. */
CC_DLL void ccArrayAppendArray(ccArray* arr, ccArray* plusArr);

/** Appends objects from plusArr to arr. Capacity of arr is increased if needed. */
CC_DLL void ccArrayAppendArrayWithResize(ccArray* arr, ccArray* plusArr);

/** Inserts an object at index */
CC_DLL void ccArrayInsertObjectAtIndex(ccArray* arr, Ref* object, ssize_t index);

/** Swaps two objects */
CC_DLL void ccArraySwapObjectsAtIndexes(ccArray* arr, ssize_t index1, ssize_t index2);

/** Removes all objects from arr */
CC_DLL void ccArrayRemoveAllObjects(ccArray* arr);

/** Removes object at specified index and pushes back all subsequent objects.
 Behavior undefined if index outside [0, num-1]. */
CC_DLL void ccArrayRemoveObjectAtIndex(ccArray* arr, ssize_t index, bool releaseObj = true);

/** Removes object at specified index and fills the gap with the last object,
 thereby avoiding the need to push back subsequent objects.
 Behavior undefined if index outside [0, num-1]. */
CC_DLL void ccArrayFastRemoveObjectAtIndex(ccArray* arr, ssize_t index);

CC_DLL void ccArrayFastRemoveObject(ccArray* arr, Ref* object);

/** Searches for the first occurrence of object and removes it. If object is not
 found the function has no effect. */
CC_DLL void ccArrayRemoveObject(ccArray* arr, Ref* object, bool releaseObj = true);

/** Removes from arr all objects in minusArr. For each object in minusArr, the
 first matching instance in arr will be removed. */
CC_DLL void ccArrayRemoveArray(ccArray* arr, ccArray* minusArr);

/** Removes from arr all objects in minusArr. For each object in minusArr, all
 matching instances in arr will be removed. */
CC_DLL void ccArrayFullRemoveArray(ccArray* arr, ccArray* minusArr);

//
// // ccCArray for Values (c structures)

typedef struct _ccCArray
{
    ssize_t num, max;
    void** arr;
} ccCArray;

/** Allocates and initializes a new C array with specified capacity */
CC_DLL ccCArray* ccCArrayNew(ssize_t capacity);

/** Frees C array after removing all remaining values. Silently ignores nil arr. */
CC_DLL void ccCArrayFree(ccCArray* arr);

/** Doubles C array capacity */
CC_DLL void ccCArrayDoubleCapacity(ccCArray* arr);

/** Increases array capacity such that max >= num + extra. */
CC_DLL void ccCArrayEnsureExtraCapacity(ccCArray* arr, ssize_t extra);

/** Returns index of first occurrence of value, NSNotFound if value not found. */
CC_DLL ssize_t ccCArrayGetIndexOfValue(ccCArray* arr, void* value);

/** Returns a Boolean value that indicates whether value is present in the C array. */
CC_DLL bool ccCArrayContainsValue(ccCArray* arr, void* value);

/** Inserts a value at a certain position. Behavior undefined if array doesn't have enough capacity */
CC_DLL void ccCArrayInsertValueAtIndex(ccCArray* arr, void* value, ssize_t index);

/** Appends an value. Behavior undefined if array doesn't have enough capacity. */
CC_DLL void ccCArrayAppendValue(ccCArray* arr, void* value);

/** Appends an value. Capacity of arr is increased if needed. */
CC_DLL void ccCArrayAppendValueWithResize(ccCArray* arr, void* value);

/** Appends values from plusArr to arr. Behavior undefined if arr doesn't have
 enough capacity. */
CC_DLL void ccCArrayAppendArray(ccCArray* arr, ccCArray* plusArr);

/** Appends values from plusArr to arr. Capacity of arr is increased if needed. */
CC_DLL void ccCArrayAppendArrayWithResize(ccCArray* arr, ccCArray* plusArr);

/** Removes all values from arr */
CC_DLL void ccCArrayRemoveAllValues(ccCArray* arr);

/** Removes value at specified index and pushes back all subsequent values.
 Behavior undefined if index outside [0, num-1].
 @since v0.99.4
 */
CC_DLL void ccCArrayRemoveValueAtIndex(ccCArray* arr, ssize_t index);

/** Removes value at specified index and fills the gap with the last value,
 thereby avoiding the need to push back subsequent values.
 Behavior undefined if index outside [0, num-1].
 @since v0.99.4
 */
CC_DLL void ccCArrayFastRemoveValueAtIndex(ccCArray* arr, ssize_t index);

/** Searches for the first occurrence of value and removes it. If value is not found the function has no effect.
 @since v0.99.4
 */
CC_DLL void ccCArrayRemoveValue(ccCArray* arr, void* value);

/** Removes from arr all values in minusArr. For each Value in minusArr, the first matching instance in arr will be
 removed.
 @since v0.99.4
 */
CC_DLL void ccCArrayRemoveArray(ccCArray* arr, ccCArray* minusArr);

/** Removes from arr all values in minusArr. For each value in minusArr, all matching instances in arr will be removed.
 @since v0.99.4
 */
CC_DLL void ccCArrayFullRemoveArray(ccCArray* arr, ccCArray* minusArr);

NS_CC_END

/// @endcond
#endif  // CC_ARRAY_H