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1 /* |
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2 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). |
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3 * All rights reserved. |
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4 * This component and the accompanying materials are made available |
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5 * under the terms of "Eclipse Public License v1.0" |
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6 * which accompanies this distribution, and is available |
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7 * at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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8 * |
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9 * Initial Contributors: |
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10 * Nokia Corporation - initial contribution. |
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11 * |
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12 * Contributors: |
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13 * |
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14 * Description: |
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15 * |
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16 * |
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17 */ |
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18 |
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19 #include <s32mem.h> // RWriteStream, RReadStream |
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20 |
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21 #include "cenrepbookkeeping.h" |
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22 #include "trace.h" |
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23 |
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24 |
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25 const TUint8 KNbrOfBitsPerByte = 8; |
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26 |
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27 |
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28 #define BITSPERLWORD ( sizeof(iBookKeepingData.iUsedIndexLWords[0]) * KNbrOfBitsPerByte) |
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29 |
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30 |
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31 // ============= MEMBER FUNCTIONS ============== |
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32 |
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33 // --------------------------------------------------------------------------- |
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34 // |
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35 // --------------------------------------------------------------------------- |
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36 // |
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37 CCenrepBookKeeping::CCenrepBookKeeping() |
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38 { |
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39 FUNC_LOG; |
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40 } |
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41 |
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42 // --------------------------------------------------------------------------- |
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43 // |
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44 // --------------------------------------------------------------------------- |
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45 // |
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46 CCenrepBookKeeping::~CCenrepBookKeeping() |
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47 { |
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48 FUNC_LOG; |
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49 Clear(); |
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50 } |
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51 |
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52 // --------------------------------------------------------------------------- |
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53 // |
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54 // --------------------------------------------------------------------------- |
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55 // |
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56 TInt CCenrepBookKeeping::PresetCount() const |
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57 { |
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58 FUNC_LOG; |
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59 return iBookKeepingData.iCount; |
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60 } |
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61 |
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62 // --------------------------------------------------------------------------- |
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63 // |
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64 // --------------------------------------------------------------------------- |
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65 // |
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66 TInt CCenrepBookKeeping::FirstIndex() const |
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67 { |
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68 FUNC_LOG; |
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69 TInt retIndex( KErrGeneral ); |
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70 TUint32 bitMask( 0 ); |
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71 for ( TInt lwordOffset = 0; ; ++lwordOffset) |
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72 { |
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73 if ( 0 !=iBookKeepingData.iUsedIndexLWords[lwordOffset] ) |
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74 { |
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75 bitMask = 1; |
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76 for ( TUint8 bitOffset( 0 ); BITSPERLWORD > bitOffset; ++bitOffset ) |
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77 { |
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78 if ( KMaxNumberOfPresetStations <= ( ( BITSPERLWORD * lwordOffset ) + bitOffset ) ) |
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79 { |
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80 retIndex = KErrNotFound; |
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81 break; |
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82 } |
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83 if ( 0 != ( iBookKeepingData.iUsedIndexLWords[lwordOffset] & bitMask) ) |
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84 { |
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85 retIndex = ( BITSPERLWORD * lwordOffset ) + bitOffset; |
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86 break; |
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87 } |
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88 bitMask = bitMask << 1; |
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89 } |
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90 } |
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91 else if ( KMaxNumberOfPresetStations < ( BITSPERLWORD * (lwordOffset + 1) ) ) |
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92 { |
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93 retIndex = KErrNotFound; |
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94 break; |
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95 } |
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96 if ( KErrGeneral != retIndex ) |
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97 { |
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98 break; |
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99 } |
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100 } |
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101 INFO_1( "retIndex: %i", retIndex ); |
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102 return retIndex; |
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103 } |
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104 |
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105 // --------------------------------------------------------------------------- |
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106 // |
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107 // --------------------------------------------------------------------------- |
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108 // |
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109 TInt CCenrepBookKeeping::NextIndex( TInt aFromIndex ) |
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110 { |
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111 FUNC_LOG; |
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112 TInt retIndex( KErrGeneral ); |
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113 TInt startIndex( aFromIndex + 1 ); |
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114 TUint32 bitMask( 0 ); |
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115 TUint8 bitOffset( 0 ); |
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116 for ( TInt lwordOffset(startIndex/BITSPERLWORD); ; ++lwordOffset) |
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117 { |
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118 if ( lwordOffset == (startIndex/BITSPERLWORD) ) |
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119 { |
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120 bitMask = 1 << (startIndex%BITSPERLWORD); |
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121 bitOffset = (startIndex%BITSPERLWORD); |
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122 } |
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123 else |
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124 { |
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125 bitMask = 1; |
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126 bitOffset = 0; |
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127 } |
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128 if ( 0 !=iBookKeepingData.iUsedIndexLWords[lwordOffset] ) |
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129 { |
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130 for ( ; BITSPERLWORD > bitOffset; ++bitOffset ) |
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131 { |
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132 if ( KMaxNumberOfPresetStations <= ( ( BITSPERLWORD * lwordOffset ) + bitOffset ) ) |
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133 { |
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134 retIndex = KErrNotFound; |
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135 break; |
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136 } |
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137 if ( 0 != ( iBookKeepingData.iUsedIndexLWords[lwordOffset] & bitMask) ) |
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138 { |
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139 retIndex = ( BITSPERLWORD * lwordOffset ) + bitOffset; |
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140 break; |
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141 } |
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142 bitMask = bitMask << 1; |
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143 } |
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144 } |
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145 else if ( KMaxNumberOfPresetStations < ( BITSPERLWORD * (lwordOffset + 1) ) ) |
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146 { |
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147 retIndex = KErrNotFound; |
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148 break; |
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149 } |
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150 if ( KErrGeneral != retIndex ) |
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151 { |
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152 break; |
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153 } |
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154 } |
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155 INFO_1( "retIndex: %i", retIndex ); |
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156 return retIndex; |
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157 } |
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158 |
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159 // --------------------------------------------------------------------------- |
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160 // |
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161 // --------------------------------------------------------------------------- |
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162 // |
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163 void CCenrepBookKeeping::AddIndex( const TInt aIndex ) |
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164 { |
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165 FUNC_LOG; |
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166 if ( |
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167 ( KMaxNumberOfPresetStations >iBookKeepingData.iCount ) && |
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168 ( !IsIndexUsed( aIndex ) ) |
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169 ) |
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170 { |
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171 TInt lwordOffset(aIndex/BITSPERLWORD); |
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172 TUint bitOffset( (aIndex%BITSPERLWORD) ); |
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173 TUint32 bitMask( 1 ); |
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174 bitMask = bitMask << bitOffset; |
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175 iBookKeepingData.iUsedIndexLWords[lwordOffset] |= bitMask; |
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176 ++iBookKeepingData.iCount; |
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177 } |
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178 } |
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179 |
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180 // --------------------------------------------------------------------------- |
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181 // |
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182 // --------------------------------------------------------------------------- |
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183 // |
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184 void CCenrepBookKeeping::RemoveIndex( const TInt aIndex ) |
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185 { |
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186 FUNC_LOG; |
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187 if ( |
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188 ( 0 <iBookKeepingData.iCount ) && |
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189 ( IsIndexUsed( aIndex ) ) |
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190 ) |
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191 { |
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192 TInt lwordOffset(aIndex/BITSPERLWORD); |
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193 TUint bitOffset( (aIndex%BITSPERLWORD) ); |
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194 TUint32 bitMask( 1 ); |
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195 bitMask = bitMask << bitOffset; |
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196 bitMask = ~bitMask; |
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197 iBookKeepingData.iUsedIndexLWords[lwordOffset] &= bitMask; |
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198 --iBookKeepingData.iCount; |
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199 } |
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200 } |
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201 |
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202 // --------------------------------------------------------------------------- |
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203 // |
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204 // --------------------------------------------------------------------------- |
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205 // |
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206 void CCenrepBookKeeping::Clear() |
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207 { |
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208 FUNC_LOG; |
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209 for ( TInt lwordOffset(0); LENGTHOFUSEDINDEXLWORDSARRAY > lwordOffset; ++lwordOffset) |
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210 { |
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211 iBookKeepingData.iUsedIndexLWords[lwordOffset] = 0; |
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212 } |
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213 iBookKeepingData.iCount = 0; |
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214 } |
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215 |
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216 // --------------------------------------------------------------------------- |
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217 // |
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218 // --------------------------------------------------------------------------- |
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219 // |
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220 TInt CCenrepBookKeeping::FindUnusedIndex() const |
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221 { |
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222 FUNC_LOG; |
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223 TInt retIndex( KErrGeneral ); |
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224 TUint32 bitMask( 0 ); |
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225 for ( TInt lwordOffset = 0; ; ++lwordOffset) |
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226 { |
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227 if ( 0xFFFFFFFF !=iBookKeepingData.iUsedIndexLWords[lwordOffset] ) |
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228 { |
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229 bitMask = 1; |
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230 for ( TUint8 bitOffset = 0; BITSPERLWORD > bitOffset; ++bitOffset ) |
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231 { |
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232 if ( KMaxNumberOfPresetStations <= ( ( BITSPERLWORD * lwordOffset ) + bitOffset ) ) |
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233 { |
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234 retIndex = KErrNotFound; |
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235 break; |
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236 } |
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237 if ( 0 == ( iBookKeepingData.iUsedIndexLWords[lwordOffset] & bitMask) ) |
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238 { |
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239 retIndex = ( BITSPERLWORD * lwordOffset ) + bitOffset; |
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240 break; |
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241 } |
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242 bitMask = bitMask << 1; |
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243 } |
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244 } |
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245 else if ( KMaxNumberOfPresetStations < ( BITSPERLWORD * (lwordOffset + 1) ) ) |
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246 { |
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247 retIndex = KErrNotFound; |
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248 break; |
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249 } |
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250 if ( KErrGeneral != retIndex ) |
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251 { |
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252 break; |
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253 } |
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254 } |
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255 INFO_1( "retIndex: %i", retIndex ); |
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256 return retIndex; |
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257 } |
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258 |
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259 // --------------------------------------------------------------------------- |
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260 // |
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261 // --------------------------------------------------------------------------- |
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262 // |
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263 TBool CCenrepBookKeeping::IsIndexUsed( const TInt aIndex ) |
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264 { |
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265 FUNC_LOG; |
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266 TInt lwordOffset(aIndex/BITSPERLWORD); |
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267 TUint bitOffset( (aIndex%BITSPERLWORD) ); |
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268 TUint32 bitMask( 1 ); |
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269 bitMask = bitMask << bitOffset; |
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270 return ( iBookKeepingData.iUsedIndexLWords[lwordOffset] & bitMask); |
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271 } |
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272 |
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273 // --------------------------------------------------------------------------- |
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274 // |
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275 // --------------------------------------------------------------------------- |
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276 // |
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277 TPtr8 CCenrepBookKeeping::BookKeepingData() |
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278 { |
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279 TPtr8 bookKeepingData( (TUint8*)&iBookKeepingData, sizeof( iBookKeepingData ), sizeof( iBookKeepingData ) ); |
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280 return bookKeepingData; |
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281 } |