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1 // Copyright (c) 2006-2009 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 #include <e32math.h> //Math class |
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17 #include <s32mem.h> //TMemBuf |
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18 #include "SqlBufIterator.h" |
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19 |
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20 /////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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21 //////////////////////// TSqlBufIterator class ///////////////////////////////////// |
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22 /////////////////////////////////////////////////////////////////////////////////////////////////////////// |
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23 |
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24 /** |
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25 @return Represents the content of the current flat buffer field as integer value. |
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26 */ |
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27 inline TInt TSqlBufRIterator::AsInt() const |
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28 { |
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29 __SQLASSERT(iCurrent >= iBegin && iCurrent < iEnd, ESqlPanicInternalError); |
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30 return *reinterpret_cast <const TInt32*> (reinterpret_cast <const TUint8*> (iBegin) + iCurrent->iPos); |
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31 } |
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32 |
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33 /** |
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34 @return Represents the content of the current flat buffer field as 64 bit integer value. |
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35 */ |
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36 inline TInt64 TSqlBufRIterator::AsInt64() const |
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37 { |
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38 __SQLASSERT(iCurrent >= iBegin && iCurrent < iEnd, ESqlPanicInternalError); |
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39 return *reinterpret_cast <const TInt64*> (reinterpret_cast <const TUint8*> (iBegin) + iCurrent->iPos); |
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40 } |
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41 |
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42 /** |
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43 @return Represents the content of the current flat buffer field as real value. |
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44 */ |
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45 inline TReal TSqlBufRIterator::AsReal() const |
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46 { |
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47 __SQLASSERT(iCurrent >= iBegin && iCurrent < iEnd, ESqlPanicInternalError); |
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48 return *reinterpret_cast <const TReal*> (reinterpret_cast <const TUint8*> (iBegin) + iCurrent->iPos); |
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49 } |
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50 |
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51 /** |
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52 @return Represents the content of the current flat buffer field as integer value. |
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53 If the current flat buffer field type does not refer to an integer, then |
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54 the function will do a data conversion as described in the table which can be found |
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55 in SqlBufIterator.h file. |
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56 */ |
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57 TInt TSqlBufRIterator::Int() const |
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58 { |
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59 __SQLASSERT(iCurrent >= iBegin && iCurrent < iEnd, ESqlPanicInternalError); |
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60 switch(Type()) |
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61 { |
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62 case ESqlInt64: |
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63 { |
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64 TInt64 val = AsInt64(); |
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65 return val == (TInt)val ? (TInt)val : (val < KMinTInt ? KMinTInt : KMaxTInt); |
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66 } |
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67 case ESqlReal: |
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68 { |
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69 TReal roundVal; |
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70 TInt err = Math::Round(roundVal, AsReal(), 0); |
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71 if(err != KErrNone) |
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72 { |
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73 return KMinTInt; |
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74 } |
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75 TRealX val(roundVal); |
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76 return static_cast <TInt> (val); |
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77 } |
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78 case ESqlNull: |
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79 case ESqlText: |
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80 case ESqlBinary: |
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81 return 0; |
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82 case ESqlZeroBlob: |
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83 return AsInt(); |
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84 default: |
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85 return AsInt(); |
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86 } |
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87 } |
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88 |
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89 /** |
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90 @return Represents the content of the current flat buffer field as 64 bit integer value. |
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91 If the current flat buffer field type does not refer to a 64 bit integer, then |
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92 the function will do a data conversion as described in the table which can be found |
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93 in SqlBufIterator.h file. |
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94 */ |
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95 TInt64 TSqlBufRIterator::Int64() const |
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96 { |
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97 __SQLASSERT(iCurrent >= iBegin && iCurrent < iEnd, ESqlPanicInternalError); |
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98 switch(Type()) |
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99 { |
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100 case ESqlInt: |
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101 case ESqlZeroBlob: |
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102 return AsInt(); |
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103 case ESqlReal: |
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104 { |
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105 TReal roundVal; |
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106 TInt err = Math::Round(roundVal, AsReal(), 0); |
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107 if(err != KErrNone) |
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108 { |
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109 return KMinTInt64; |
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110 } |
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111 TRealX val(roundVal); |
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112 return static_cast <TInt64> (val); |
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113 } |
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114 case ESqlNull: |
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115 case ESqlText: |
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116 case ESqlBinary: |
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117 return 0; |
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118 default: |
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119 return AsInt64(); |
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120 } |
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121 } |
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122 |
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123 /** |
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124 @return Represents the content of the current flat buffer field as real value. |
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125 If the current flat buffer field type does not refer to a real, then |
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126 the function will do a data conversion as described in the table which can be found |
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127 in SqlBufIterator.h file. |
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128 */ |
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129 TReal TSqlBufRIterator::Real() const |
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130 { |
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131 __SQLASSERT(iCurrent >= iBegin && iCurrent < iEnd, ESqlPanicInternalError); |
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132 switch(Type()) |
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133 { |
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134 case ESqlInt: |
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135 case ESqlZeroBlob: |
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136 { |
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137 TRealX val(AsInt()); |
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138 return static_cast <TReal> (val); |
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139 } |
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140 case ESqlInt64: |
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141 { |
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142 TRealX val(AsInt64()); |
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143 return static_cast <TReal> (val); |
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144 } |
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145 case ESqlNull: |
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146 case ESqlText: |
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147 case ESqlBinary: |
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148 return 0.0; |
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149 default: |
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150 return AsReal(); |
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151 } |
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152 } |
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153 |
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154 /** |
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155 @return Represents the content of the current flat buffer field as binary (8 bit) descriptor. |
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156 If the current flat buffer field type does not refer to a binary block of data, then |
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157 the function will do a data conversion as described in the table which can be found |
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158 in SqlBufIterator.h file. |
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159 */ |
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160 TPtrC8 TSqlBufRIterator::Binary() const |
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161 { |
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162 __SQLASSERT(iCurrent >= iBegin && iCurrent < iEnd, ESqlPanicInternalError); |
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163 TInt size = Size(); |
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164 if(Type() != ESqlBinary || size == 0) |
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165 { |
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166 return TPtrC8(); |
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167 } |
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168 return TPtrC8(reinterpret_cast <const TUint8*> (iBegin) + iCurrent->iPos, size); |
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169 } |
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170 |
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171 /** |
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172 @return Represents the content of the current flat buffer field as text (16 bit) descriptor. |
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173 If the current flat buffer field type does not refer to a text block of data, then |
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174 the function will do a data conversion as described in the table which can be found |
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175 in SqlBufIterator.h file. |
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176 */ |
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177 TPtrC16 TSqlBufRIterator::Text() const |
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178 { |
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179 __SQLASSERT(iCurrent >= iBegin && iCurrent < iEnd, ESqlPanicInternalError); |
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180 TInt size = Size(); |
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181 if(Type() != ESqlText || size == 0) |
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182 { |
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183 return TPtrC16(); |
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184 } |
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185 return TPtrC16(reinterpret_cast <const TUint16*> (reinterpret_cast <const TUint8*> (iBegin) + iCurrent->iPos), size); |
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186 } |
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187 |
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188 /** |
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189 An instance of the class is used to get a read-only access to the content of a text or binary column |
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190 via a stream object. |
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191 |
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192 @internalComponent |
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193 */ |
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194 class HReadOnlyBuf : public TMemBuf |
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195 { |
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196 public: |
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197 static HReadOnlyBuf* NewL(const TUint8* aFrom, TInt aLen) |
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198 { |
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199 __SQLASSERT(aLen >= 0, ESqlPanicBadArgument); |
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200 HReadOnlyBuf* self = new (ELeave) HReadOnlyBuf; |
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201 TUint8* p = const_cast <TUint8*> (aFrom); |
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202 self->Set(p, p + aLen, MStreamBuf::ERead); |
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203 return self; |
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204 } |
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205 |
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206 private: |
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207 virtual void DoRelease() |
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208 { |
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209 delete this; |
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210 } |
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211 |
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212 }; |
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213 |
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214 /** |
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215 @return Represents the content of a text or a binary field as a stream of bytes. |
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216 |
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217 @leave KErrNoMemory, out of memory condition has occured; |
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218 */ |
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219 MStreamBuf* TSqlBufRIterator::StreamL() const |
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220 { |
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221 __SQLASSERT(iCurrent >= iBegin && iCurrent < iEnd, ESqlPanicInternalError); |
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222 __SQLASSERT(::IsSequenceSqlType(Type()), ESqlPanicInternalError); |
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223 return HReadOnlyBuf::NewL(reinterpret_cast <const TUint8*> (iBegin) + iCurrent->iPos, iCurrent->Size()); |
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224 } |