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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 <e32base.h> |
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20 #include "cstringparser.h" |
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21 |
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22 |
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23 CStringParser::CStringParser ( const TDesC8& aBuffer ): iBuffer ( aBuffer ), |
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24 iCurrentPos ( 0 ) |
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25 { |
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26 } |
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27 |
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28 CStringParser::~CStringParser () |
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29 { |
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30 } |
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31 |
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32 |
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33 CStringParser* CStringParser::NewL ( const TDesC8& aBuffer ) |
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34 { |
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35 return (new( ELeave)CStringParser( aBuffer )); |
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36 } |
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37 |
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38 /** |
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39 Get the next character from the current position, and increments the |
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40 current position by 1. |
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41 |
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42 @param aChar [out] Next character to be read |
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43 |
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44 @return TBool ETrue if the current position is less than the string length |
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45 else returns EFalse |
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46 */ |
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47 TBool CStringParser::GetNextCharacter ( TChar& aChar ) |
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48 { |
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49 IncrementCurrentPos (); |
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50 return ( GetCurrentCharacter ( aChar ) ); |
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51 } |
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52 |
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53 /** |
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54 Get the character from the current position. |
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55 |
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56 @param aChar [out] Current character to be read |
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57 |
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58 @return TBool ETrue if the current position is less than the string length |
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59 else returns EFalse |
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60 */ |
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61 TBool CStringParser::GetCurrentCharacter ( TChar& aChar ) |
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62 { |
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63 if ( iCurrentPos >= iBuffer.Length () ) |
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64 { |
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65 return EFalse; |
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66 } |
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67 |
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68 aChar = iBuffer[ iCurrentPos ]; |
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69 return ETrue; |
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70 } |
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71 |
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72 /** |
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73 Parses the string till it finds the aEndChar. |
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74 |
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75 @param TChar [in] Character to search for. |
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76 @see GetNextWorrd |
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77 */ |
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78 TBool CStringParser::ParseTill ( TPtrC8& aWord, TChar aEndChar ) |
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79 { |
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80 TPtrC8 cur( iBuffer.Mid( iCurrentPos ) ); |
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81 TBool found = ETrue; |
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82 TInt pos = cur.Locate( aEndChar ); |
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83 if ( pos < 0 ) |
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84 { |
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85 // Unable to locate the aEndChar. Sets the end position to |
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86 // the length of the string. |
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87 pos = iBuffer.Length (); |
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88 found = EFalse; |
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89 } |
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90 |
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91 aWord.Set ( cur.Left (pos) ); |
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92 SkipLength ( pos ); |
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93 return found; |
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94 } |
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95 |
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96 /** |
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97 Increments the current parsing position by aLen. |
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98 |
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99 @param TInt [in] Number of character to skip. |
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100 |
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101 @return TBool ETrue if the current parsing position is less than the buffer length |
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102 else returns EFalse. |
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103 */ |
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104 TBool CStringParser::SkipLength ( TInt aLen ) |
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105 { |
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106 iCurrentPos += aLen; |
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107 |
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108 if ( iCurrentPos < iBuffer.Length () ) |
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109 { |
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110 return ETrue; |
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111 } |
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112 return EFalse; |
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113 } |
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114 |
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115 /** |
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116 Finds the remainder string from the current parsing position to the buffer length. |
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117 |
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118 @param TPtrC8& [out] Points to the current starting position till end |
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119 |
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120 @return TBool ETrue if the current parsing position is less than the buffer length |
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121 else returns EFalse. |
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122 */ |
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123 void CStringParser::GetRemainder ( TPtrC8& aBuffer ) |
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124 { |
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125 aBuffer.Set ( iBuffer.Mid ( iCurrentPos ) ); |
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126 SkipLength ( aBuffer.Length () ); |
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127 } |
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128 |
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129 /** |
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130 Increments the current parsing position by 1. |
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131 */ |
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132 void CStringParser::IncrementCurrentPos ( ) |
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133 { |
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134 ++iCurrentPos; |
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135 } |
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136 |
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137 /** |
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138 Parses till the first occurrence of any one of a set of characters in aCharSet, |
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139 from the current parsing position. |
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140 |
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141 @param TPtrC8& [out] Points to the current starting position. |
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142 @param const TDesC8& [in] Descriptor containing characters for matching. |
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143 */ |
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144 void CStringParser::ParseTill ( TPtrC8& aWord, const TDesC8& aCharSet ) |
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145 { |
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146 TPtrC8 cur( iBuffer.Mid( iCurrentPos ) ); |
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147 |
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148 TInt lowpos = cur.Length (); |
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149 TInt pos = KErrNotFound; |
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150 |
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151 for ( TInt i = 0; i < aCharSet.Length(); ++i ) |
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152 { |
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153 pos = cur.Locate ( aCharSet [ i ] ); |
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154 |
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155 if ( (pos != KErrNotFound) && (pos < lowpos ) ) |
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156 { |
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157 lowpos = pos; |
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158 } |
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159 } |
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160 |
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161 aWord.Set ( cur.Left ( lowpos ) ); |
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162 SkipLength ( lowpos ); |
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163 } |
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164 |
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165 |
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166 |
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167 |
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168 |