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https://github.com/mozilla/gecko-dev.git
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526 lines
11 KiB
C++
526 lines
11 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 "msg.h"
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#include "xp.h"
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#include "ptrarray.h"
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#include "xp_qsort.h"
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#ifdef XP_WIN16
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#define SIZE_T_MAX 0xFF80 // Maximum allocation size
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#define MAX_ARR_ELEMS SIZE_T_MAX/sizeof(void *)
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#endif
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XPPtrArray::XPPtrArray()
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{
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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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XPPtrArray::~XPPtrArray()
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{
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SetSize(0);
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}
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/////////////////////////////////////////////////////////////////////////////
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int XPPtrArray::GetSize() const
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{
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return m_nSize;
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}
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XP_Bool XPPtrArray::IsValidIndex(int32 nIndex)
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{
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return (nIndex < GetSize() && nIndex >= 0);
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}
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XP_Bool XPPtrArray::SetSize(int nSize)
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{
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XP_ASSERT(nSize >= 0);
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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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XP_ASSERT(nSize <= MAX_ARR_ELEMS); // Will fail
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return 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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XP_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 = MAX(8, nSize);
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m_pData = (void **)XP_CALLOC(1, m_nMaxSize * sizeof(void *));
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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 initialized to zero
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if (nSize > m_nSize)
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XP_MEMSET(&m_pData[m_nSize], 0, (nSize - m_nSize) * sizeof(void *));
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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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int nGrowBy, nMaxSize;
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nGrowBy = MIN(1024, MAX(8, m_nSize / 8));
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nMaxSize = MAX(nSize, m_nMaxSize + nGrowBy);
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#ifdef MAX_ARR_ELEMS
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nMaxSize = MIN(MAX_ARR_ELEMS, nMaxSize);
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#endif
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void **pNewData = (void **)XP_ALLOC(nMaxSize * sizeof(void *));
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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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XP_MEMCPY(pNewData, m_pData, m_nSize * sizeof(void *));
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// Zero out the remaining elements
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XP_MEMSET(&pNewData[m_nSize], 0, (nSize - m_nSize) * sizeof(void *));
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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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XP_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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void*& XPPtrArray::ElementAt(int nIndex)
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{
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XP_ASSERT(nIndex >= 0 && nIndex < m_nSize);
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return m_pData[nIndex];
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}
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int XPPtrArray::FindIndex (int nStartIndex, void *pToFind) const
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{
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for (int i = nStartIndex; i < GetSize(); i++)
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if (m_pData[i] == pToFind)
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return i;
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return -1;
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}
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int XPPtrArray::FindIndexUsing(int nStartIndex, void* pToFind, XPCompareFunc* compare) const
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{
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for (int i = nStartIndex; i < GetSize(); i++)
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if (compare(&m_pData[i], &pToFind) == 0)
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return i;
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return -1;
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}
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void *XPPtrArray::GetAt(int nIndex) const
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{
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XP_ASSERT(nIndex >= 0 && nIndex < m_nSize);
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return m_pData[nIndex];
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}
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void XPPtrArray::SetAt(int nIndex, void *newElement)
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{
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XP_ASSERT(nIndex >= 0 && nIndex < m_nSize);
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m_pData[nIndex] = newElement;
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}
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/////////////////////////////////////////////////////////////////////////////
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int XPPtrArray::Add(void *newElement)
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{
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int 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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void XPPtrArray::InsertAt(int nIndex, void *newElement, int nCount)
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{
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XP_ASSERT(nIndex >= 0);
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XP_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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XP_MEMMOVE(&m_pData[nIndex + nCount], &m_pData[nIndex],
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(nOldSize - nIndex) * sizeof(void *));
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}
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// Insert the new elements
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XP_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 XPPtrArray::InsertAt(int nStartIndex, const XPPtrArray *pNewArray)
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{
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XP_ASSERT(nStartIndex >= 0);
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XP_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 (int 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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XP_Bool XPPtrArray::Remove(void *pToRemove)
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{
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int index = FindIndex(0, pToRemove);
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if (index != -1)
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{
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RemoveAt(index);
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return TRUE;
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}
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else
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return FALSE;
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}
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void XPPtrArray::RemoveAll()
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{
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SetSize(0);
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}
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void XPPtrArray::RemoveAt(int nIndex, int nCount)
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{
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XP_ASSERT(nIndex >= 0);
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XP_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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XP_MEMMOVE(&m_pData[nIndex], &m_pData[nIndex + nCount],
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nMoveCount * sizeof(void*));
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m_nSize -= nCount;
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}
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}
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void XPPtrArray::RemoveAt(int nStartIndex, const XPPtrArray *pArray)
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{
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XP_ASSERT(nStartIndex >= 0);
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XP_ASSERT(pArray != NULL);
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for (int i = 0; i < pArray->GetSize(); i++)
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{
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int index = FindIndex(nStartIndex, pArray->GetAt(i));
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if (index >= 0)
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RemoveAt(index);
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}
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}
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void XPPtrArray::SetAtGrow(int nIndex, void *newElement)
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{
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XP_ASSERT(nIndex >= 0);
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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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int XPPtrArray::InsertBinary(void *newElement, int ( *compare )(const void *elem1, const void *elem2))
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{
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int current = 0;
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int left = 0;
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int right = GetSize() - 1;
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int comparison = 0;
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while (left <= right)
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{
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current = (left + right) / 2;
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void *pCurrent = GetAt(current);
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comparison = compare(&pCurrent, &newElement);
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if (comparison == 0)
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break;
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else if (comparison > 0)
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right = current - 1;
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else
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left = current + 1;
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}
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if (comparison < 0)
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current += 1;
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XPPtrArray::InsertAt(current, newElement);
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return current;
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}
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void XPPtrArray::QuickSort (int ( *compare )(const void *elem1, const void *elem2))
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{
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if (m_nSize > 1)
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XP_QSORT (m_pData, m_nSize, sizeof(void*), compare);
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}
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/////////////////////////////////////////////////////////////////////////////
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void *XPPtrArray::operator[](int nIndex) const
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{
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return GetAt(nIndex);
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}
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void *&XPPtrArray::operator[](int nIndex)
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{
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return ElementAt(nIndex);
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}
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/////////////////////////////////////////////////////////////////////////////
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// XPSortedPtrArray
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XPSortedPtrArray::XPSortedPtrArray(XPCompareFunc *compare)
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:XPPtrArray()
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{
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m_CompareFunc = compare;
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}
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int XPSortedPtrArray::Add(void *newElement)
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{
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#ifdef MAX_ARR_ELEMS
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if (m_nSize >= MAX_ARR_ELEMS)
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return -1;
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#endif
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if (m_CompareFunc)
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return InsertBinary(newElement, m_CompareFunc);
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else
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return XPPtrArray::Add (newElement);
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}
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int XPSortedPtrArray::FindIndex(int nStartIndex, void *pToFind) const
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{
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if (m_CompareFunc)
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return FindIndexUsing(nStartIndex, pToFind, m_CompareFunc);
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else
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return XPPtrArray::FindIndex(nStartIndex, pToFind);
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}
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int XPSortedPtrArray::FindIndexUsing(int nStartIndex, void *pToFind, XPCompareFunc *compare) const
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{
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if (GetSize() == 0)
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return -1;
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if (!m_CompareFunc)
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return TRUE;
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int current = 0;
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int left = nStartIndex;
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int right = GetSize() - 1;
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int comparison = 0;
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while (left <= right)
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{
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current = (left + right) / 2;
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void *pCurrent = GetAt(current);
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comparison = compare(&pCurrent, &pToFind);
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if (comparison == 0)
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break;
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else if (comparison > 0)
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right = current - 1;
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else
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left = current + 1;
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}
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if (comparison != 0)
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current = -1;
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return current;
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}
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/////////////////////////////////////////////////////////////////////////////
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//-----------------------------------
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// These functions are not to be called if the array is sorted (i.e. has a compare func)
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//-----------------------------------
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void XPSortedPtrArray::SetAt(int index, void *newElement)
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{
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if (!m_CompareFunc)
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XPPtrArray::SetAt (index, newElement);
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else
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XP_ASSERT(FALSE); // Illegal operation because the array is sorted
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}
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void XPSortedPtrArray::InsertAt(int index, void *newElement, int count)
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{
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if (!m_CompareFunc)
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XPPtrArray::InsertAt (index, newElement, count);
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else
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XP_ASSERT(FALSE); // Illegal operation because the array is sorted
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}
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void XPSortedPtrArray::InsertAt(int index, const XPPtrArray *array)
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{
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if (!m_CompareFunc)
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XPPtrArray::InsertAt (index, array);
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else
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XP_ASSERT(FALSE); // Illegal operation because the array is sorted
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}
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/////////////////////////////////////////////////////////////////////////////
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// Diagnostics
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#ifdef DEBUG
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XP_Bool XPPtrArray::VerifySort() const
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{
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return TRUE;
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}
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XP_Bool XPSortedPtrArray::VerifySort() const
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{
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// Check that the assumption of sorting in the array is valid.
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if (GetSize() > 0 && m_CompareFunc)
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{
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void *cur = GetAt(0);
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for (int i = 1; i < GetSize(); i++)
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{
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void *prev = cur;
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cur = GetAt(i);
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if (m_CompareFunc(&cur, &prev) < 0)
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{
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XP_ASSERT(FALSE);
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return FALSE;
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}
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}
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}
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return TRUE;
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}
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#endif
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///////////////////////////////////////////////////////////////////////////////
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msg_StringArray::msg_StringArray(XP_Bool ownsMemory, XPCompareFunc *compare)
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:XPSortedPtrArray(compare)
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{
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m_ownsMemory = ownsMemory;
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}
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msg_StringArray::~msg_StringArray()
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{
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RemoveAll();
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}
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int msg_StringArray::Add(void *string)
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{
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return XPPtrArray::Add(m_ownsMemory ? XP_STRDUP((char *)string) : string);
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}
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void msg_StringArray::RemoveAll()
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{
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if (m_ownsMemory)
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{
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for (int i = 0; i < GetSize(); i++)
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{
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void *v = (void *)GetAt(i);
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XP_FREEIF(v);
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}
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}
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XPSortedPtrArray::RemoveAll(); // call the base class to shrink m_pData list
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}
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XP_Bool msg_StringArray::ImportTokenList(const char *list, const char *tokenSeparators /* = " ," */)
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{
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// Tokenizes the input string and builds up the array of strings based on the
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// optional caller-provided token separators.
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XP_ASSERT(m_ownsMemory); // must own the memory for the substrings
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if (list && m_ownsMemory)
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{
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char *scratch = XP_STRDUP(list); // make a copy cause strtok will change it
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if (scratch)
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{
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char *elem = XP_STRTOK(scratch, tokenSeparators);
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if (elem)
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{
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Add (elem);
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while (NULL != (elem = XP_STRTOK(NULL, tokenSeparators)))
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Add (elem);
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}
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XP_FREE(scratch);
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return TRUE;
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}
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}
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return FALSE;
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}
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char *msg_StringArray::ExportTokenList(const char *separator /* = " ," */)
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{
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// Catenates all the member strings into a big string separated by optional
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// caller-provided string. The return value must be freed by the caller
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int i, len = 0;
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int lenSep = XP_STRLEN(separator);
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for (i = 0; i < GetSize(); i++)
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len += XP_STRLEN(GetAt(i)) + lenSep;
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char *list = (char *)XP_ALLOC(len + 1);
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if (list)
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{
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*list = '\0';
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for (i = 0; i < GetSize(); i++)
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{
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if (i > 0)
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XP_STRCAT(list, separator);
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XP_STRCAT(list, GetAt(i));
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}
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}
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return list;
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}
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