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1 // Copyright (c) 2004-2009 Nokia Corporation and/or its subsidiary(-ies). |
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2 // All rights reserved. |
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3 // This component and the accompanying materials are made available |
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4 // under the terms of "Eclipse Public License v1.0" |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.eclipse.org/legal/epl-v10.html". |
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7 // |
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8 // Initial Contributors: |
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9 // Nokia Corporation - initial contribution. |
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10 // |
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11 // Contributors: |
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12 // |
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13 // Description: |
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14 // |
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15 |
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16 /** |
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17 @file |
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18 @internalTechnology |
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19 */ |
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20 |
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21 #include <elements/metabuffer.h> |
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22 #include <elements/metadata.h> |
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23 |
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24 |
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25 #ifdef _DEBUG |
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26 // Panic category for "absolutely impossible!" vanilla ASSERT()-type panics from this module |
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27 // (if it could happen through user error then you should give it an explicit, documented, category + code) |
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28 _LIT(KSpecAssert_ElemNetMetaMtBfr, "ElemNetMetaMtBfr"); |
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29 #endif |
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30 |
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31 using namespace Meta; |
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32 |
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33 TMetaBuf8::TMetaBuf8(const TAny* aData) |
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34 : TMetaVarLen8<RBuf8>(aData) |
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35 { |
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36 } |
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37 |
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38 EXPORT_C MMetaType* TMetaBuf8::NewL(const TAny* aMem, const TAny* aData) |
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39 /** |
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40 * Instantiates a meta type for RBuf8. |
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41 * Used for attribure registration (in the data v-table). |
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42 */ |
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43 { |
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44 return ::new ((TUint8*)aMem) TMetaBuf8(aData); |
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45 } |
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46 |
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47 EXPORT_C TInt TMetaBuf8::Load(TPtrC8& aBuffer) |
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48 { |
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49 TInt errlen = CheckBuf( aBuffer ); |
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50 if (errlen < 0) |
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51 { |
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52 return errlen; |
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53 } |
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54 if ( iData->MaxLength() < errlen ) |
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55 { |
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56 iData->Close(); |
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57 TInt err = iData->Create(errlen); |
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58 if ( err != KErrNone ) |
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59 return err; |
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60 } |
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61 //and copy whatever we can into the client descriptor |
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62 CopyBuf(aBuffer,errlen); |
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63 |
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64 TInt padByte = errlen % 2; |
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65 aBuffer.Set(aBuffer.Ptr() + errlen + padByte, aBuffer.Length() - errlen - padByte); //update pointer |
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66 return KErrNone; |
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67 } |
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68 |
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69 EXPORT_C TInt TMetaBuf8::Store(TDes8& aBuffer) const |
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70 { |
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71 // Ask the descriptor how much data does it currently store |
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72 TUint32 size = this->iData->Length(); |
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73 |
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74 // The length variable and the data must fit |
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75 if ((TUint32)(aBuffer.MaxLength() - aBuffer.Length()) < (size + sizeof(TUint32))) |
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76 { |
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77 return KErrOverflow; |
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78 } |
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79 |
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80 // Store |
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81 aBuffer.Append((TUint8*)&size, sizeof(TUint32)); |
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82 AppendToBuf(aBuffer); |
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83 if (size & 1) |
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84 { |
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85 // Pad odd lengths to an even number to avoid potential |
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86 // alignment issues on target |
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87 TUint8 pad(0); |
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88 aBuffer.Append(&pad, 1); |
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89 } |
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90 |
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91 return KErrNone; |
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92 } |
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93 |
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94 EXPORT_C void TMetaBuf8::Copy(const TAny* aData) |
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95 { |
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96 const RBuf8& var = *((RBuf8*)aData); |
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97 if ( iData->MaxLength() < var.Length() ) |
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98 { |
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99 iData->Close(); |
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100 TInt err = iData->Create(var.Length()); |
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101 if ( err != KErrNone ) |
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102 return; |
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103 } |
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104 TMetaVarLen8<RBuf8>::Copy(aData); |
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105 } |
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106 |
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107 EXPORT_C TInt TMetaBuf8::Length() const |
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108 { |
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109 return TMetaVarLen8<RBuf8>::Length(); |
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110 } |
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111 |
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112 TMetaBuf16::TMetaBuf16(const TAny* aData) |
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113 : TMetaVarLen16<RBuf16>(aData) |
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114 { |
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115 } |
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116 |
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117 EXPORT_C MMetaType* TMetaBuf16::NewL(const TAny* aMem, const TAny* aData) |
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118 /** |
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119 * Instantiates a meta type for RBuf8. |
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120 * Used for attribure registration (in the data v-table). |
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121 */ |
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122 { |
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123 return ::new ((TUint8*)aMem) TMetaBuf16(aData); |
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124 } |
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125 |
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126 EXPORT_C TInt TMetaBuf16::Load(TPtrC8& aBuffer) |
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127 { |
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128 TInt errlen = CheckBuf( aBuffer ); |
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129 if (errlen < 0) |
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130 { |
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131 return errlen; |
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132 } |
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133 |
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134 // errlen is in bytes we want unicode chars |
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135 __ASSERT_DEBUG((errlen & 1) == 0, User::Panic(KSpecAssert_ElemNetMetaMtBfr, 1)); |
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136 if ( iData->MaxLength() < errlen / 2) |
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137 { |
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138 iData->Close(); |
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139 TInt err = iData->Create(errlen / 2); |
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140 if ( err != KErrNone ) |
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141 return err; |
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142 } |
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143 //and copy whatever we can into the client descriptor |
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144 CopyBuf(aBuffer,errlen); |
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145 |
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146 aBuffer.Set(aBuffer.Ptr() + errlen, aBuffer.Length() - errlen); //update pointer |
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147 return KErrNone; |
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148 } |
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149 |
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150 EXPORT_C TInt TMetaBuf16::Store(TDes8& aBuffer) const |
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151 { |
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152 return TMetaVarLen16<RBuf16>::Store(aBuffer); |
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153 } |
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154 |
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155 EXPORT_C void TMetaBuf16::Copy(const TAny* aData) |
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156 { |
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157 const RBuf16& var = *((RBuf16*)aData); |
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158 if ( iData->MaxLength() < var.Length() ) |
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159 { |
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160 iData->Close(); |
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161 TInt err = iData->Create(var.Length()); |
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162 if ( err != KErrNone ) |
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163 return; |
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164 } |
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165 TMetaVarLen16<RBuf16>::Copy(aData); |
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166 } |
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167 |
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168 EXPORT_C TInt TMetaBuf16::Length() const |
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169 { |
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170 return TMetaVarLen16<RBuf16>::Length(); |
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171 } |
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172 |
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173 |
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174 |