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/**
* @file lldarray.h
* @brief Wrapped std::vector for backward compatibility.
*
* Copyright (c) 2001-$CurrentYear$, Linden Research, Inc.
* $License$
*/
#ifndef LL_LLDARRAY_H
#define LL_LLDARRAY_H
#include "llmath.h"
#include "llerror.h"
#include <vector>
#include <map>
// class LLDynamicArray<>; // = std::vector + reserves <BlockSize> elements
// class LLDynamicArrayIndexed<>; // = std::vector + std::map if indices, only supports operator[] and begin(),end()
//--------------------------------------------------------
// LLDynamicArray declaration
//--------------------------------------------------------
// NOTE: BlockSize is used to reserve a minimal initial amount
template <typename Type, int BlockSize = 32>
class LLDynamicArray : public std::vector<Type>
{
public:
enum
{
OKAY = 0,
FAIL = -1
};
LLDynamicArray(S32 size=0) : std::vector<Type>(size) { if (size < BlockSize) std::vector<Type>::reserve(BlockSize); }
void reset() { std::vector<Type>::resize(0); }
// ACCESSORS
const Type& get(S32 index) const { return std::vector<Type>::operator[](index); }
Type& get(S32 index) { return std::vector<Type>::operator[](index); }
S32 find(const Type &obj) const;
S32 count() const { return std::vector<Type>::size(); }
S32 getLength() const { return std::vector<Type>::size(); }
S32 getMax() const { return std::vector<Type>::capacity(); }
// MANIPULATE
S32 put(const Type &obj); // add to end of array, returns index
// Type* reserve(S32 num); // reserve a block of indices in advance
Type* reserve_block(U32 num); // reserve a block of indices in advance
S32 remove(S32 index); // remove by index, no bounds checking
S32 removeObj(const Type &obj); // remove by object
S32 removeLast();
void operator+=(const LLDynamicArray<Type,BlockSize> &other);
};
//--------------------------------------------------------
// LLDynamicArray implementation
//--------------------------------------------------------
template <typename Type,int BlockSize>
inline S32 LLDynamicArray<Type,BlockSize>::find(const Type &obj) const
{
typename std::vector<Type>::const_iterator iter = std::find(this->begin(), this->end(), obj);
if (iter != this->end())
{
return iter - this->begin();
}
return FAIL;
}
template <typename Type,int BlockSize>
inline S32 LLDynamicArray<Type,BlockSize>::remove(S32 i)
{
// This is a fast removal by swapping with the last element
S32 sz = this->size();
if (i < 0 || i >= sz)
{
return FAIL;
}
if (i < sz-1)
{
this->operator[](i) = this->back();
}
this->pop_back();
return i;
}
template <typename Type,int BlockSize>
inline S32 LLDynamicArray<Type,BlockSize>::removeObj(const Type& obj)
{
typename std::vector<Type>::iterator iter = std::find(this->begin(), this->end(), obj);
if (iter != this->end())
{
typename std::vector<Type>::iterator last = this->end();
--last;
*iter = *last;
this->pop_back();
return iter - this->begin();
}
return FAIL;
}
template <typename Type,int BlockSize>
inline S32 LLDynamicArray<Type,BlockSize>::removeLast()
{
if (!this->empty())
{
this->pop_back();
return OKAY;
}
return FAIL;
}
template <typename Type,int BlockSize>
inline Type* LLDynamicArray<Type,BlockSize>::reserve_block(U32 num)
{
U32 sz = this->size();
this->resize(sz+num);
return &(this->operator[](sz));
}
template <typename Type,int BlockSize>
inline S32 LLDynamicArray<Type,BlockSize>::put(const Type &obj)
{
this->push_back(obj);
return this->size() - 1;
}
template <typename Type,int BlockSize>
inline void LLDynamicArray<Type,BlockSize>::operator+=(const LLDynamicArray<Type,BlockSize> &other)
{
insert(this->end(), other.begin(), other.end());
}
//--------------------------------------------------------
// LLDynamicArrayIndexed declaration
//--------------------------------------------------------
template <typename Type, typename Key, int BlockSize = 32>
class LLDynamicArrayIndexed
{
public:
typedef typename std::vector<Type>::iterator iterator;
typedef typename std::vector<Type>::const_iterator const_iterator;
typedef typename std::vector<Type>::reverse_iterator reverse_iterator;
typedef typename std::vector<Type>::const_reverse_iterator const_reverse_iterator;
typedef typename std::vector<Type>::size_type size_type;
protected:
std::vector<Type> mVector;
std::map<Key, U32> mIndexMap;
public:
LLDynamicArrayIndexed() { mVector.reserve(BlockSize); }
iterator begin() { return mVector.begin(); }
const_iterator begin() const { return mVector.begin(); }
iterator end() { return mVector.end(); }
const_iterator end() const { return mVector.end(); }
reverse_iterator rbegin() { return mVector.rbegin(); }
const_reverse_iterator rbegin() const { return mVector.rbegin(); }
reverse_iterator rend() { return mVector.rend(); }
const_reverse_iterator rend() const { return mVector.rend(); }
void reset() { mVector.resize(0); mIndexMap.resize(0); }
bool empty() const { return mVector.empty(); }
size_type size() const { return mVector.empty(); }
Type& operator[](const Key& k)
{
typename std::map<Key, U32>::iterator iter = mIndexMap.find(k);
if (iter == mIndexMap.end())
{
U32 n = mVector.size();
mIndexMap[k] = n;
mVector.resize(n+1);
return mVector[n];
}
else
{
return mVector[iter->second];
}
}
};
#endif
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