author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Tue, 31 Aug 2010 17:02:56 +0300 | |
branch | RCL_3 |
changeset 32 | 889504eac4fb |
permissions | -rw-r--r-- |
32
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/* |
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* Copyright (c) 2003 - 2004 Nokia Corporation and/or its subsidiary(-ies). |
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* All rights reserved. |
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* This component and the accompanying materials are made available |
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* under the terms of the License "Eclipse Public License v1.0" |
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* which accompanies this distribution, and is available |
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* at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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* |
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* Initial Contributors: |
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* Nokia Corporation - initial contribution. |
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* |
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* Contributors: |
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* |
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* Description: |
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* |
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*/ |
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|
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#include <xml/cxml/nw_tinytree.h> |
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#include "cxml_internal.h" |
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|
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/* ------------------------------------------------------------------------- */ |
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|
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/* ------------------------------------------------------------------------- */ |
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static |
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CXML_Uint8* |
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CXML_Vector_AllocateSegment (CXML_Vector_t* thisObj, NW_TinyTree_TreeNode_t* sentinel) |
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{ |
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CXML_Uint8* buffer = NULL; |
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if(sentinel) |
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{ |
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buffer = (NW_Uint8*) NW_Mem_Malloc ((thisObj->segmentSize + 1) * thisObj->elementSize); |
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if(buffer) |
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{ |
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NW_Mem_memcpy(buffer, sentinel, sizeof(NW_TinyTree_TreeNode_t)); |
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buffer += thisObj->elementSize; |
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} |
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} |
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else |
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{ |
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buffer = (NW_Uint8*) NW_Mem_Malloc (thisObj->segmentSize * thisObj->elementSize); |
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} |
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return buffer; |
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} |
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|
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/* ------------------------------------------------------------------------- */ |
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static |
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NW_Status_t |
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CXML_Vector_ResizeCapacity (CXML_Vector_t* thisObj, |
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CXML_Vector_Metric_t capacityNeeded, |
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NW_TinyTree_TreeNode_t* sentinel) |
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{ |
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CXML_Vector_Metric_t newNumSegments; |
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CXML_Vector_Metric_t newSegmentListSize; |
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NW_Uint8** newSegmentList; |
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// CXML_Vector_Metric_t index; |
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|
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/* calculate the new segmentList size */ |
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newNumSegments = |
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(CXML_Vector_Metric_t) ((capacityNeeded - 1) / thisObj->segmentSize + 1); |
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newSegmentListSize = (CXML_Vector_Metric_t) |
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(((newNumSegments - 1) / CXML_SEGMENT_LIST_INCREMENT + 1) * CXML_SEGMENT_LIST_INCREMENT); |
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|
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/* if we are shrinking the array, we must first deallocate all the segments |
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that will be obsolete */ |
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while (thisObj->numSegments > newNumSegments) { |
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NW_Mem_Free (thisObj->segmentList[--thisObj->numSegments]); |
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} |
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thisObj->capacity = |
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(CXML_Vector_Metric_t) (thisObj->numSegments * thisObj->segmentSize); |
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|
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/* allocate the new segmentList and copy the old segmentList entries into the |
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new */ |
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newSegmentList = |
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(NW_Uint8**) NW_Mem_Malloc (newSegmentListSize * sizeof (*newSegmentList)); |
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if (newSegmentList == NULL) { |
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return NW_STAT_OUT_OF_MEMORY; |
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} |
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(void) NW_Mem_memcpy (newSegmentList, thisObj->segmentList, |
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thisObj->numSegments * sizeof (*newSegmentList)); |
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|
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/* free the old segmentList and install the new */ |
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NW_Mem_Free (thisObj->segmentList); |
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|
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thisObj->segmentList = newSegmentList; |
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thisObj->segmentListSize = newSegmentListSize; |
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|
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/* if we are growing the array we need to allocate the new segments */ |
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while (thisObj->numSegments < newNumSegments) { |
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thisObj->segmentList[thisObj->numSegments] = |
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CXML_Vector_AllocateSegment(thisObj, sentinel); |
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if (thisObj->segmentList[thisObj->numSegments++] == NULL) { |
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thisObj->numSegments -= 1; |
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return NW_STAT_OUT_OF_MEMORY; |
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} |
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} |
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thisObj->capacity = |
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(CXML_Vector_Metric_t) (thisObj->numSegments * thisObj->segmentSize); |
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|
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/* successful completion */ |
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return NW_STAT_SUCCESS; |
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} |
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|
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/* ------------------------------------------------------------------------- */ |
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105 |
static |
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106 |
NW_Status_t |
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107 |
CXML_Vector_MoveElements (CXML_Vector_t* thisObj, |
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108 |
CXML_Vector_Metric_t srcIndex, |
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109 |
CXML_Vector_Metric_t dstIndex, |
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110 |
NW_TinyTree_TreeNode_t* sentinel) |
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111 |
{ |
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112 |
NW_Int32 sizeDelta; |
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CXML_Vector_Metric_t numElements; |
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NW_Int32 index; |
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115 |
|
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116 |
/* */ |
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117 |
if (dstIndex > srcIndex) { |
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sizeDelta = dstIndex - srcIndex; |
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119 |
} else { |
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sizeDelta = - (NW_Int32) (srcIndex - dstIndex); |
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121 |
} |
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122 |
|
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if (thisObj->size + sizeDelta > thisObj->capacity) { |
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NW_Status_t status; |
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125 |
|
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status = CXML_Vector_ResizeCapacity (thisObj, |
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(CXML_Vector_Metric_t) (thisObj->size + sizeDelta), sentinel); |
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if (status != NW_STAT_SUCCESS) { |
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return status; |
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130 |
} |
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131 |
} |
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132 |
|
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133 |
/* now do the actual move */ |
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/* TODO: this is a very inefficient way of moving the data, we will probably |
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need to implement a block move capability */ |
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numElements = (CXML_Vector_Metric_t) (thisObj->size - srcIndex); |
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137 |
if (srcIndex > dstIndex) { |
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for (index = 0; index < NW_INT32_CAST(numElements); index++) { |
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(void) NW_Mem_memcpy (CXML_Vector_AddressAt (thisObj, |
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(CXML_Vector_Metric_t) (dstIndex + index)), CXML_Vector_AddressAt (thisObj, |
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(CXML_Vector_Metric_t) (srcIndex + index)), thisObj->elementSize); |
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142 |
} |
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143 |
} else { |
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for (index = numElements - 1; index >= 0; index--) { |
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(void) NW_Mem_memcpy (CXML_Vector_AddressAt (thisObj, |
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146 |
(CXML_Vector_Metric_t) (dstIndex + index)), CXML_Vector_AddressAt (thisObj, |
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147 |
(CXML_Vector_Metric_t) (srcIndex + index)), thisObj->elementSize); |
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148 |
} |
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149 |
} |
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150 |
|
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151 |
/* successful completion */ |
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return NW_STAT_SUCCESS; |
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153 |
} |
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154 |
|
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155 |
CXML_Vector_t* |
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CXML_Vector_Construct(CXML_Vector_Metric_t elementSize, |
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CXML_Vector_Metric_t segmentSize) |
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158 |
{ |
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CXML_Vector_t* vector = (CXML_Vector_t*) NW_Mem_Malloc(sizeof(CXML_Vector_t)); |
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160 |
|
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if(vector) |
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162 |
{ |
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vector->elementSize = elementSize; |
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vector->capacity = 0; |
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vector->size = 0; |
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166 |
|
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vector->segmentSize = segmentSize; |
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vector->segmentListSize = CXML_SEGMENT_LIST_INCREMENT; |
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169 |
|
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//Allocate memory for one segment here. For more memory the |
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//function CXML_Vector_ResizeCapacity() will do the job. |
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172 |
|
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vector->segmentList = (NW_Uint8**) |
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NW_Mem_Malloc (vector->segmentListSize * sizeof (*vector->segmentList)); |
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175 |
|
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if (vector->segmentList == NULL) { |
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NW_Mem_Free(vector); |
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return NULL; |
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} |
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vector->numSegments = 0; |
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181 |
} |
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return vector; |
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183 |
} |
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184 |
|
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185 |
void |
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CXML_Vector_Destruct(CXML_Vector_t* vector) |
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187 |
{ |
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CXML_Vector_Metric_t index; |
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for (index = 0; index < vector->numSegments; index++) { |
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NW_Mem_Free (vector->segmentList[index]); |
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191 |
} |
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NW_Mem_Free (vector->segmentList); |
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NW_Mem_Free(vector); |
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194 |
} |
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195 |
|
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196 |
void |
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197 |
CXML_Vector_AdjustSegment(CXML_Vector_t* vector) |
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198 |
{ |
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199 |
CXML_Vector_Metric_t index; |
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200 |
|
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201 |
/* |
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202 |
* Walk through segment list adjusting pointers to the |
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* sentinel element at the beginning of each segment |
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*/ |
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205 |
|
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for (index = 0; index < vector->numSegments; index++) { |
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vector->segmentList[index] -= vector->elementSize; |
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208 |
} |
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209 |
} |
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210 |
|
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NW_Uint8* |
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CXML_Vector_AddressAt (const CXML_Vector_t* thisObj, |
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CXML_Vector_Metric_t index) |
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214 |
{ |
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CXML_Vector_Metric_t segmentIndex; |
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216 |
|
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/* determine the segment index and return the offset into that segment */ |
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segmentIndex = |
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(CXML_Vector_Metric_t) (index / thisObj->segmentSize); |
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220 |
return |
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(NW_Uint8*) thisObj->segmentList[segmentIndex] |
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+ (index % thisObj->segmentSize) * thisObj->elementSize; |
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223 |
} |
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224 |
|
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225 |
/* ------------------------------------------------------------------------- */ |
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226 |
void** |
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227 |
CXML_Vector_InsertAt (CXML_Vector_t* thisObj, |
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void* element, |
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CXML_Vector_Metric_t where, |
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void* sentinel) |
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231 |
{ |
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NW_Status_t status; |
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233 |
|
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/* convert the where if CXML_Vector_AtEnd is specified */ |
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if (where == CXML_Vector_AtEnd) { |
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where = thisObj->size; |
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} |
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238 |
|
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/* make sure that the where element is not out of bounds */ |
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NW_ASSERT (where <= thisObj->size); |
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241 |
|
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/* move all the elements up by one, if this fails we simply return |
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the error code passed to us */ |
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status = |
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CXML_Vector_MoveElements (thisObj, where, |
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(CXML_Vector_Metric_t) (where + 1), |
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(NW_TinyTree_TreeNode_t*) sentinel); |
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if (status != NW_STAT_SUCCESS) { |
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return NULL; |
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} |
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251 |
|
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/* copy the element into vector */ |
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if (element != NULL) { |
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(void) NW_Mem_memcpy (CXML_Vector_AddressAt (thisObj, where), |
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element, thisObj->elementSize); |
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} else { |
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257 |
/* |
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* if element is NULL, then we need to zero out the memory block. This is necessary |
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* because later code which fills in the values for this newly allocated vector |
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* element may leave some bytes in the memory block un-assigned due to padding. |
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*/ |
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NW_Mem_memset ( CXML_Vector_AddressAt (thisObj, where), |
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0, thisObj->elementSize); |
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} |
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265 |
|
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/* increment the size count */ |
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thisObj->size += 1; |
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268 |
|
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/* successful completion */ |
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return (void**) |
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CXML_Vector_AddressAt (thisObj, where); |
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} |
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273 |
|
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274 |
/* ------------------------------------------------------------------------- */ |
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NW_Status_t |
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CXML_Vector_RemoveAt (CXML_Vector_t* thisObj, |
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CXML_Vector_Metric_t index) |
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278 |
{ |
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NW_Status_t status; |
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280 |
|
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/* convert the index if CXML_Vector_AtEnd is specified */ |
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if (index == CXML_Vector_AtEnd) { |
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index = (CXML_Vector_Metric_t) (thisObj->size - 1); |
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} |
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285 |
|
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/* make sure that the index element is not out of bounds */ |
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if (index >= thisObj->size) { |
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return NW_STAT_FAILURE; |
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} |
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290 |
|
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/* don't bother to move anything if the resultant size is zero */ |
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if (thisObj->size > 1) { |
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/* move all the elements down by one, if this fails we simply return |
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the error code passed to us */ |
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status = |
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CXML_Vector_MoveElements (thisObj, (CXML_Vector_Metric_t) (index + 1), |
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index, NULL); |
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if (status != NW_STAT_SUCCESS) { |
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return status; |
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} |
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301 |
} |
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|
302 |
|
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/* increment the size count */ |
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thisObj->size -= 1; |
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|
305 |
|
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306 |
/* successful completion */ |
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return NW_STAT_SUCCESS; |
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} |
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309 |
|
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/* ------------------------------------------------------------------------- */ |
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311 |
void** |
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CXML_Vector_ElementAt (const CXML_Vector_t* vector, |
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CXML_Vector_Metric_t index) |
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314 |
{ |
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315 |
if (index >= vector->size) { |
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316 |
return NULL; |
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317 |
} |
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return (void**) CXML_Vector_AddressAt (vector, index); |
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} |
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/* ------------------------------------------------------------------------- */ |
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CXML_Vector_Metric_t |
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CXML_Vector_GetElementIndex (const CXML_Vector_t* vector, |
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void* target) |
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{ |
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CXML_Vector_Metric_t index; |
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|
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for (index = 0; index < vector->size; index++) { |
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void* element; |
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|
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/* get and compare the element */ |
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element = CXML_Vector_ElementAt (vector, index); |
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if (NW_Mem_memcmp (target, element, vector->elementSize) == 0) { |
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return index; |
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} |
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} |
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|
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/* no match found, return CXML_Vector_AtEnd */ |
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return CXML_Vector_AtEnd; |
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} |
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341 |