gecko-dev/mailnews/base/util/nsUInt32Array.cpp

273 lines
6.5 KiB
C++

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