529 lines
11 KiB
C++
529 lines
11 KiB
C++
/*
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AngelCode Scripting Library
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Copyright (c) 2003-2014 Andreas Jonsson
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any
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damages arising from the use of this software.
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Permission is granted to anyone to use this software for any
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purpose, including commercial applications, and to alter it and
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redistribute it freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you
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must not claim that you wrote the original software. If you use
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this software in a product, an acknowledgment in the product
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documentation would be appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and
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must not be misrepresented as being the original software.
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3. This notice may not be removed or altered from any source
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distribution.
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The original version of this library can be located at:
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http://www.angelcode.com/angelscript/
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Andreas Jonsson
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andreas@angelcode.com
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*/
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#ifndef AS_ARRAY_H
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#define AS_ARRAY_H
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#if !defined(AS_NO_MEMORY_H)
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#include <memory.h>
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#endif
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#include <string.h> // some compilers declare memcpy() here
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#ifdef _MSC_VER
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#pragma warning(disable:4345) // warning about a change in how the code is handled in this version
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#endif
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BEGIN_AS_NAMESPACE
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template <class T> class asCArray
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{
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public:
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asCArray();
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asCArray(const asCArray<T> &);
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asCArray(asUINT reserve);
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~asCArray();
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void Allocate(asUINT numElements, bool keepData);
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void AllocateNoConstruct(asUINT numElements, bool keepData);
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asUINT GetCapacity() const;
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void PushLast(const T &element);
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T PopLast();
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bool SetLength(asUINT numElements);
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bool SetLengthNoConstruct(asUINT numElements);
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asUINT GetLength() const;
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void Copy(const T*, asUINT count);
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asCArray<T> &operator =(const asCArray<T> &);
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void SwapWith(asCArray<T> &other);
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const T &operator [](asUINT index) const;
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T &operator [](asUINT index);
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T *AddressOf();
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const T *AddressOf() const;
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bool Concatenate(const asCArray<T> &);
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void Concatenate(T*, unsigned int count);
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bool Exists(const T &element) const;
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int IndexOf(const T &element) const;
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void RemoveIndex(asUINT index); // Removes the entry without reordering the array
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void RemoveValue(const T &element); // Removes the value without reordering the array
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void RemoveIndexUnordered(asUINT index); // Removes the entry without keeping the order
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bool operator==(const asCArray<T> &) const;
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bool operator!=(const asCArray<T> &) const;
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protected:
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T *array;
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asUINT length; // 32bits is enough for all uses of this array
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asUINT maxLength;
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char buf[2*4*AS_PTR_SIZE]; // Avoid dynamically allocated memory for tiny arrays
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};
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// Implementation
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template <class T>
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T *asCArray<T>::AddressOf()
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{
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return array;
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}
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template <class T>
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const T *asCArray<T>::AddressOf() const
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{
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return array;
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}
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template <class T>
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asCArray<T>::asCArray(void)
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{
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array = 0;
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length = 0;
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maxLength = 0;
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}
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template <class T>
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asCArray<T>::asCArray(const asCArray<T> ©)
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{
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array = 0;
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length = 0;
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maxLength = 0;
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*this = copy;
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}
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template <class T>
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asCArray<T>::asCArray(asUINT reserve)
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{
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array = 0;
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length = 0;
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maxLength = 0;
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Allocate(reserve, false);
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}
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template <class T>
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asCArray<T>::~asCArray(void)
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{
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// Allocating a zero length array will free all memory
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Allocate(0,0);
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}
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template <class T>
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asUINT asCArray<T>::GetLength() const
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{
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return length;
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}
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template <class T>
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const T &asCArray<T>::operator [](asUINT index) const
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{
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asASSERT(index < length);
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return array[index];
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}
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template <class T>
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T &asCArray<T>::operator [](asUINT index)
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{
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asASSERT(index < length);
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return array[index];
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}
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template <class T>
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void asCArray<T>::PushLast(const T &element)
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{
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if( length == maxLength )
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{
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if( maxLength == 0 )
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Allocate(1, false);
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else
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Allocate(2*maxLength, true);
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if( length == maxLength )
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{
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// Out of memory. Return without doing anything
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return;
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}
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}
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array[length++] = element;
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}
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template <class T>
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T asCArray<T>::PopLast()
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{
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asASSERT(length > 0);
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return array[--length];
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}
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template <class T>
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void asCArray<T>::Allocate(asUINT numElements, bool keepData)
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{
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// We have 4 situations
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// 1. The previous array is 8 bytes or smaller and the new array is also 8 bytes or smaller
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// 2. The previous array is 8 bytes or smaller and the new array is larger than 8 bytes
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// 3. The previous array is larger than 8 bytes and the new array is 8 bytes or smaller
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// 4. The previous array is larger than 8 bytes and the new array is also larger than 8 bytes
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T *tmp = 0;
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if( numElements )
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{
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if( sizeof(T)*numElements <= sizeof(buf) )
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// Use the internal buffer
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tmp = reinterpret_cast<T*>(buf);
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else
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{
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// Allocate the array and construct each of the elements
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tmp = asNEWARRAY(T,numElements);
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if( tmp == 0 )
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{
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// Out of memory. Return without doing anything
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return;
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}
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}
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if( array == tmp )
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{
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// Construct only the newly allocated elements
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for( asUINT n = length; n < numElements; n++ )
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new (&tmp[n]) T();
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}
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else
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{
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// Construct all elements
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for( asUINT n = 0; n < numElements; n++ )
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new (&tmp[n]) T();
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}
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}
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if( array )
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{
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asUINT oldLength = length;
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if( array == tmp )
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{
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if( keepData )
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{
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if( length > numElements )
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length = numElements;
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}
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else
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length = 0;
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// Call the destructor for elements that are no longer used
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for( asUINT n = length; n < oldLength; n++ )
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array[n].~T();
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}
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else
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{
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if( keepData )
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{
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if( length > numElements )
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length = numElements;
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for( asUINT n = 0; n < length; n++ )
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tmp[n] = array[n];
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}
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else
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length = 0;
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// Call the destructor for all elements
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for( asUINT n = 0; n < oldLength; n++ )
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array[n].~T();
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if( array != reinterpret_cast<T*>(buf) )
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asDELETEARRAY(array);
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}
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}
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array = tmp;
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maxLength = numElements;
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}
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template <class T>
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void asCArray<T>::AllocateNoConstruct(asUINT numElements, bool keepData)
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{
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// We have 4 situations
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// 1. The previous array is 8 bytes or smaller and the new array is also 8 bytes or smaller
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// 2. The previous array is 8 bytes or smaller and the new array is larger than 8 bytes
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// 3. The previous array is larger than 8 bytes and the new array is 8 bytes or smaller
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// 4. The previous array is larger than 8 bytes and the new array is also larger than 8 bytes
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T *tmp = 0;
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if( numElements )
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{
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if( sizeof(T)*numElements <= sizeof(buf) )
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// Use the internal buffer
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tmp = reinterpret_cast<T*>(buf);
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else
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{
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// Allocate the array and construct each of the elements
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tmp = asNEWARRAY(T,numElements);
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if( tmp == 0 )
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{
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// Out of memory. Return without doing anything
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return;
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}
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}
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}
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if( array )
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{
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if( array == tmp )
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{
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if( keepData )
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{
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if( length > numElements )
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length = numElements;
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}
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else
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length = 0;
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}
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else
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{
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if( keepData )
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{
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if( length > numElements )
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length = numElements;
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memcpy(tmp, array, sizeof(T)*length);
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}
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else
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length = 0;
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if( array != reinterpret_cast<T*>(buf) )
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asDELETEARRAY(array);
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}
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}
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array = tmp;
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maxLength = numElements;
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}
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template <class T>
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asUINT asCArray<T>::GetCapacity() const
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{
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return maxLength;
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}
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template <class T>
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bool asCArray<T>::SetLength(asUINT numElements)
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{
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if( numElements > maxLength )
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{
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Allocate(numElements, true);
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if( numElements > maxLength )
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{
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// Out of memory. Return without doing anything
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return false;
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}
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}
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length = numElements;
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return true;
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}
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template <class T>
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bool asCArray<T>::SetLengthNoConstruct(asUINT numElements)
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{
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if( numElements > maxLength )
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{
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AllocateNoConstruct(numElements, true);
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if( numElements > maxLength )
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{
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// Out of memory. Return without doing anything
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return false;
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}
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}
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length = numElements;
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return true;
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}
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template <class T>
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void asCArray<T>::Copy(const T *data, asUINT count)
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{
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if( maxLength < count )
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{
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Allocate(count, false);
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if( maxLength < count )
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{
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// Out of memory. Return without doing anything
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return;
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}
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}
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for( asUINT n = 0; n < count; n++ )
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array[n] = data[n];
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length = count;
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}
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template <class T>
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asCArray<T> &asCArray<T>::operator =(const asCArray<T> ©)
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{
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Copy(copy.array, copy.length);
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return *this;
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}
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template <class T>
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void asCArray<T>::SwapWith(asCArray<T> &other)
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{
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T *tmpArray = array;
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asUINT tmpLength = length;
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asUINT tmpMaxLength = maxLength;
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char tmpBuf[sizeof(buf)];
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memcpy(tmpBuf, buf, sizeof(buf));
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array = other.array;
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length = other.length;
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maxLength = other.maxLength;
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memcpy(buf, other.buf, sizeof(buf));
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other.array = tmpArray;
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other.length = tmpLength;
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other.maxLength = tmpMaxLength;
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memcpy(other.buf, tmpBuf, sizeof(buf));
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// If the data is in the internal buffer, then the array pointer must refer to it
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if( array == reinterpret_cast<T*>(other.buf) )
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array = reinterpret_cast<T*>(buf);
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if( other.array == reinterpret_cast<T*>(buf) )
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other.array = reinterpret_cast<T*>(other.buf);
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}
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template <class T>
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bool asCArray<T>::operator ==(const asCArray<T> &other) const
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{
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if( length != other.length ) return false;
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for( asUINT n = 0; n < length; n++ )
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if( array[n] != other.array[n] )
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return false;
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return true;
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}
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template <class T>
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bool asCArray<T>::operator !=(const asCArray<T> &other) const
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{
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return !(*this == other);
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}
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// Returns false if the concatenation wasn't successful due to out of memory
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template <class T>
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bool asCArray<T>::Concatenate(const asCArray<T> &other)
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{
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if( maxLength < length + other.length )
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{
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Allocate(length + other.length, true);
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if( maxLength < length + other.length )
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{
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// Out of memory
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return false;
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}
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}
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for( asUINT n = 0; n < other.length; n++ )
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array[length+n] = other.array[n];
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length += other.length;
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// Success
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return true;
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}
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template <class T>
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void asCArray<T>::Concatenate(T* array, unsigned int count)
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{
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for( unsigned int c = 0; c < count; c++ )
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PushLast(array[c]);
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}
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template <class T>
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bool asCArray<T>::Exists(const T &e) const
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{
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return IndexOf(e) == -1 ? false : true;
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}
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template <class T>
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int asCArray<T>::IndexOf(const T &e) const
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{
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for( asUINT n = 0; n < length; n++ )
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if( array[n] == e ) return static_cast<int>(n);
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return -1;
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}
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template <class T>
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void asCArray<T>::RemoveIndex(asUINT index)
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{
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if( index < length )
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{
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for( asUINT n = index; n < length-1; n++ )
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array[n] = array[n+1];
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PopLast();
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}
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}
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template <class T>
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void asCArray<T>::RemoveValue(const T &e)
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{
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for( asUINT n = 0; n < length; n++ )
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{
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if( array[n] == e )
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{
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RemoveIndex(n);
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break;
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}
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}
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}
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template <class T>
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void asCArray<T>::RemoveIndexUnordered(asUINT index)
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{
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if( index == length - 1 )
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PopLast();
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else if( index < length )
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array[index] = PopLast();
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}
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END_AS_NAMESPACE
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#endif
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