mirror of
https://github.com/mozilla/gecko-dev.git
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273 lines
6.5 KiB
C++
273 lines
6.5 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#include "msgCore.h" // precompiled header...
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#include "MailNewsTypes.h"
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#include "nsUInt32Array.h"
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#include "nsQuickSort.h"
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nsUInt32Array::nsUInt32Array()
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{
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m_nSize = 0;
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m_nMaxSize = 0;
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m_nGrowBy = 0;
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m_pData = NULL;
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}
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nsUInt32Array::~nsUInt32Array()
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{
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SetSize(0);
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}
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/////////////////////////////////////////////////////////////////////////////
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PRUint32 nsUInt32Array::GetSize() const
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{
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return m_nSize;
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}
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PRBool nsUInt32Array::SetSize(PRUint32 nSize,
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PRBool adjustGrowth,
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PRUint32 nGrowBy)
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{
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if (adjustGrowth)
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m_nGrowBy = nGrowBy;
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#ifdef MAX_ARR_ELEMS
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if (nSize > MAX_ARR_ELEMS);
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{
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PR_ASSERT(nSize <= MAX_ARR_ELEMS); // Will fail
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return PR_FALSE;
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}
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#endif
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if (nSize == 0)
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{
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// Remove all elements
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PR_Free(m_pData);
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m_nSize = 0;
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m_nMaxSize = 0;
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m_pData = NULL;
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}
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else if (m_pData == NULL)
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{
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// Create a new array
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m_nMaxSize = PR_MAX(8, nSize);
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m_pData = (PRUint32 *)PR_Calloc(1, m_nMaxSize * sizeof(PRUint32));
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if (m_pData)
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m_nSize = nSize;
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else
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m_nSize = m_nMaxSize = 0;
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}
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else if (nSize <= m_nMaxSize)
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{
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// The new size is within the current maximum size, make sure new
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// elements are to initialized to zero
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if (nSize > m_nSize)
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nsCRT::memset(&m_pData[m_nSize], 0, (nSize - m_nSize) * sizeof(PRUint32));
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m_nSize = nSize;
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}
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else
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{
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// The array needs to grow, figure out how much
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PRUint32 nMaxSize;
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nGrowBy = PR_MAX(m_nGrowBy, PR_MIN(1024, PR_MAX(8, m_nSize / 8)));
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nMaxSize = PR_MAX(nSize, m_nMaxSize + nGrowBy);
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#ifdef MAX_ARR_ELEMS
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nMaxSize = PR_MIN(MAX_ARR_ELEMS, nMaxSize);
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#endif
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PRUint32 *pNewData = (PRUint32 *)PR_Malloc(nMaxSize * sizeof(PRUint32));
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if (pNewData)
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{
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// Copy the data from the old array to the new one
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nsCRT::memcpy(pNewData, m_pData, m_nSize * sizeof(PRUint32));
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// Zero out the remaining elements
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nsCRT::memset(&pNewData[m_nSize], 0, (nSize - m_nSize) * sizeof(PRUint32));
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m_nSize = nSize;
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m_nMaxSize = nMaxSize;
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// Free the old array
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PR_Free(m_pData);
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m_pData = pNewData;
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}
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}
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return nSize == m_nSize;
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}
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/////////////////////////////////////////////////////////////////////////////
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PRUint32 &nsUInt32Array::ElementAt(PRUint32 nIndex)
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{
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PR_ASSERT(nIndex < m_nSize);
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return m_pData[nIndex];
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}
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PRUint32 nsUInt32Array::GetAt(PRUint32 nIndex) const
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{
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PR_ASSERT(nIndex < m_nSize);
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return m_pData[nIndex];
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}
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PRUint32 *nsUInt32Array::GetData()
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{
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return m_pData;
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}
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void nsUInt32Array::SetAt(PRUint32 nIndex, PRUint32 newElement)
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{
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PR_ASSERT(nIndex < m_nSize);
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m_pData[nIndex] = newElement;
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}
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/////////////////////////////////////////////////////////////////////////////
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PRUint32 nsUInt32Array::Add(PRUint32 newElement)
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{
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PRUint32 nIndex = m_nSize;
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#ifdef MAX_ARR_ELEMS
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if (nIndex >= MAX_ARR_ELEMS)
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return -1;
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#endif
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SetAtGrow(nIndex, newElement);
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return nIndex;
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}
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PRUint32 nsUInt32Array::Add(PRUint32 *elementPtr, PRUint32 numElements)
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{
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if (SetSize(m_nSize + numElements))
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nsCRT::memcpy(m_pData + m_nSize, elementPtr, numElements * sizeof(PRUint32));
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return m_nSize;
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}
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PRUint32 *nsUInt32Array::CloneData()
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{
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PRUint32 *copyOfData = (PRUint32 *)PR_Malloc(m_nSize * sizeof(PRUint32));
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if (copyOfData)
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nsCRT::memcpy(copyOfData, m_pData, m_nSize * sizeof(PRUint32));
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return copyOfData;
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}
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void nsUInt32Array::InsertAt(PRUint32 nIndex, PRUint32 newElement, PRUint32 nCount)
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{
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PR_ASSERT(nCount > 0);
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if (nIndex >= m_nSize)
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{
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// If the new element is after the end of the array, grow the array
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SetSize(nIndex + nCount);
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}
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else
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{
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// The element is being insert inside the array
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int nOldSize = m_nSize;
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SetSize(m_nSize + nCount);
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// Move the data after the insertion point
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nsCRT::memmove(&m_pData[nIndex + nCount], &m_pData[nIndex],
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(nOldSize - nIndex) * sizeof(PRUint32));
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}
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// Insert the new elements
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PR_ASSERT(nIndex + nCount <= m_nSize);
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while (nCount--)
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m_pData[nIndex++] = newElement;
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}
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void nsUInt32Array::InsertAt(PRUint32 nStartIndex, const nsUInt32Array *pNewArray)
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{
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PR_ASSERT(pNewArray != NULL);
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if (pNewArray->GetSize() > 0)
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{
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InsertAt(nStartIndex, pNewArray->GetAt(0), pNewArray->GetSize());
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for (PRUint32 i = 1; i < pNewArray->GetSize(); i++)
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m_pData[nStartIndex + i] = pNewArray->GetAt(i);
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}
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}
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void nsUInt32Array::RemoveAll()
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{
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SetSize(0);
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}
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void nsUInt32Array::RemoveAt(PRUint32 nIndex, PRUint32 nCount)
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{
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PR_ASSERT(nIndex + nCount <= m_nSize);
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if (nCount > 0)
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{
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// Make sure not to overstep the end of the array
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int nMoveCount = m_nSize - (nIndex + nCount);
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if (nCount && nMoveCount)
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nsCRT::memmove(&m_pData[nIndex], &m_pData[nIndex + nCount],
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nMoveCount * sizeof(PRUint32));
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m_nSize -= nCount;
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}
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}
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void nsUInt32Array::SetAtGrow(PRUint32 nIndex, PRUint32 newElement)
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{
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if (nIndex >= m_nSize)
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SetSize(nIndex+1);
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m_pData[nIndex] = newElement;
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}
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/////////////////////////////////////////////////////////////////////////////
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void nsUInt32Array::CopyArray(nsUInt32Array *oldA)
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{
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CopyArray(*oldA);
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}
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void nsUInt32Array::CopyArray(nsUInt32Array &oldA)
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{
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if (m_pData)
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PR_Free(m_pData);
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m_nSize = oldA.m_nSize;
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m_nMaxSize = oldA.m_nMaxSize;
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m_pData = (PRUint32 *)PR_Malloc(m_nSize * sizeof(PRUint32));
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if (m_pData)
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nsCRT::memcpy(m_pData, oldA.m_pData, m_nSize * sizeof(PRUint32));
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}
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/////////////////////////////////////////////////////////////////////////////
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static int CompareDWord (const void *v1, const void *v2, void *)
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{
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// QuickSort callback to compare array values
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PRUint32 i1 = *(PRUint32 *)v1;
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PRUint32 i2 = *(PRUint32 *)v2;
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return i1 - i2;
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}
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void nsUInt32Array::QuickSort (int (*compare) (const void *elem1, const void *elem2, void *data))
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{
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if (m_nSize > 1)
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NS_QuickSort(m_pData, m_nSize, sizeof(void*), compare ? compare : CompareDWord, nsnull);
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}
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