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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 // Name : CSIPTokenizer.cpp |
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15 // Part of : Codec |
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16 // Version : SIP/3.0 |
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17 // |
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18 |
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19 |
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20 |
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21 |
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22 #include "CSIPTokenizer.h" |
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23 #include "sipcodecerr.h" |
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24 |
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25 // ----------------------------------------------------------------------------- |
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26 // CSIPTokenizer::NewL |
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27 // ----------------------------------------------------------------------------- |
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28 // |
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29 CSIPTokenizer* CSIPTokenizer::NewL( |
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30 const TDesC8& aValue, |
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31 const TChar& aSeparator, |
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32 TBool aIgnoreParenthesis, |
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33 TBool aIgnoreLastEmptyValue, |
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34 TBool aSkipSeparatorsBeforeAt) |
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35 { |
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36 CSIPTokenizer* self = |
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37 CSIPTokenizer::NewLC( aValue,aSeparator, aIgnoreParenthesis, |
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38 aIgnoreLastEmptyValue, aSkipSeparatorsBeforeAt ); |
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39 CleanupStack::Pop(self); |
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40 return self; |
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41 } |
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42 |
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43 // ----------------------------------------------------------------------------- |
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44 // CSIPTokenizer::NewLC |
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45 // ----------------------------------------------------------------------------- |
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46 // |
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47 CSIPTokenizer* CSIPTokenizer::NewLC( |
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48 const TDesC8& aValue, |
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49 const TChar& aSeparator, |
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50 TBool aIgnoreParenthesis, |
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51 TBool aIgnoreLastEmptyValue, |
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52 TBool aSkipSeparatorsBeforeAt) |
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53 { |
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54 __ASSERT_ALWAYS (aValue.Length() > 0, User::Leave (KErrSipCodecTokenizer)); |
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55 __ASSERT_ALWAYS (aSeparator != '\\', User::Leave (KErrSipCodecTokenizer)); |
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56 __ASSERT_ALWAYS (aSeparator != '"', User::Leave (KErrSipCodecTokenizer)); |
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57 __ASSERT_ALWAYS (aSeparator != '<', User::Leave (KErrSipCodecTokenizer)); |
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58 __ASSERT_ALWAYS (aSeparator != '>', User::Leave (KErrSipCodecTokenizer)); |
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59 if(!aIgnoreParenthesis) |
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60 { |
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61 __ASSERT_ALWAYS (aSeparator != '(', User::Leave(KErrSipCodecTokenizer)); |
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62 __ASSERT_ALWAYS (aSeparator != ')', User::Leave(KErrSipCodecTokenizer)); |
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63 } |
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64 |
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65 CSIPTokenizer* self = |
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66 new(ELeave)CSIPTokenizer(aValue,aSeparator,aIgnoreParenthesis, |
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67 aIgnoreLastEmptyValue, |
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68 aSkipSeparatorsBeforeAt ); |
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69 CleanupStack::PushL(self); |
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70 self->ConstructL(); |
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71 return self; |
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72 } |
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73 |
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74 // ----------------------------------------------------------------------------- |
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75 // CSIPTokenizer::CSIPTokenizer |
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76 // ----------------------------------------------------------------------------- |
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77 // |
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78 CSIPTokenizer::CSIPTokenizer(const TDesC8& aValue, |
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79 const TChar& aSeparator, |
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80 TBool aIgnoreParenthesis, |
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81 TBool aIgnoreLastEmptyValue, |
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82 TBool aSkipSeparatorsBeforeAt) |
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83 : iOriginalValue (aValue), |
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84 iLexer( aValue ), |
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85 iSeparator (aSeparator), |
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86 iPreviousWasBackSlash (EFalse), |
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87 iInQuotes (EFalse), |
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88 iInAngleBrackets (EFalse), |
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89 iInParenthesis (EFalse), |
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90 iIgnoreParenthesis (aIgnoreParenthesis), |
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91 iIgnoreLastEmptyValue ( aIgnoreLastEmptyValue ), |
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92 iSkipSeparatorsBeforeAt ( aSkipSeparatorsBeforeAt ) |
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93 { |
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94 } |
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95 |
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96 // ----------------------------------------------------------------------------- |
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97 // CSIPTokenizer::ConstructL |
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98 // ----------------------------------------------------------------------------- |
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99 // |
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100 void CSIPTokenizer::ConstructL() |
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101 { |
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102 iTokens = new(ELeave)CPtrC8Array(1); |
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103 TokenizeL(); |
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104 } |
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105 |
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106 // ----------------------------------------------------------------------------- |
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107 // CSIPTokenizer::~CSIPTokenizer |
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108 // ----------------------------------------------------------------------------- |
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109 // |
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110 CSIPTokenizer::~CSIPTokenizer() |
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111 { |
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112 delete iTokens; |
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113 } |
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114 |
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115 // ----------------------------------------------------------------------------- |
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116 // CSIPTokenizer::Tokens |
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117 // ----------------------------------------------------------------------------- |
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118 // |
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119 CPtrC8Array& CSIPTokenizer::Tokens() |
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120 { |
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121 return *iTokens; |
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122 } |
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123 |
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124 // ----------------------------------------------------------------------------- |
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125 // CSIPTokenizer::TokenizeL |
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126 // ----------------------------------------------------------------------------- |
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127 // |
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128 void CSIPTokenizer::TokenizeL() |
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129 { |
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130 TChar chr = iLexer.Get(); |
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131 |
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132 while (chr) |
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133 { |
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134 iParsedSoFar++; iTokenLength++; |
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135 if (chr == '\\') |
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136 { |
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137 // If the previous character was already a backslash, |
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138 // then it is quoting the current backslash. |
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139 iPreviousWasBackSlash = !iPreviousWasBackSlash; |
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140 } |
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141 else |
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142 { |
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143 switch (chr) |
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144 { |
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145 case '"' : HandleQuote(); break; |
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146 case '<' : HandleOpeningAngleBracketL(); break; |
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147 case '>' : HandleClosingAngleBracketL(); break; |
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148 case '(' : HandleOpeningParenthesis(); break; |
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149 case ')' : HandleClosingParenthesis(); break; |
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150 default: HandleOtherCharacterL(chr); break; |
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151 } |
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152 iPreviousWasBackSlash = EFalse; |
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153 } |
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154 chr = iLexer.Get(); |
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155 } |
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156 |
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157 CheckMatchingQuotesBracketsL(); |
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158 AddLastTokenL(); // Add the last token after all the other tokens. |
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159 } |
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160 |
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161 // ----------------------------------------------------------------------------- |
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162 // CSIPTokenizer::HandleQuote |
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163 // ----------------------------------------------------------------------------- |
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164 // |
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165 void CSIPTokenizer::HandleQuote() |
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166 { |
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167 if (iPreviousWasBackSlash) |
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168 { |
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169 return; |
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170 } |
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171 |
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172 iInQuotes = !iInQuotes; |
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173 iQuoteCount++; |
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174 } |
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175 |
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176 // ----------------------------------------------------------------------------- |
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177 // CSIPTokenizer::HandleOpeningAngleBracketL |
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178 // ----------------------------------------------------------------------------- |
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179 // |
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180 void CSIPTokenizer::HandleOpeningAngleBracketL() |
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181 { |
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182 if (iInQuotes) |
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183 { |
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184 return; // ignore |
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185 } |
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186 |
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187 // Nested angle brackets are not allowed |
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188 __ASSERT_ALWAYS (!iInAngleBrackets, |
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189 User::Leave (KErrSipCodecTokenizer)); |
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190 |
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191 iInAngleBrackets = ETrue; |
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192 iAngleBracketCount++; |
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193 } |
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194 |
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195 // ----------------------------------------------------------------------------- |
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196 // CSIPTokenizer::HandleClosingAngleBracketL |
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197 // ----------------------------------------------------------------------------- |
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198 // |
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199 void CSIPTokenizer::HandleClosingAngleBracketL() |
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200 { |
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201 if (iInQuotes) |
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202 { |
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203 return; // ignore |
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204 } |
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205 |
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206 // Matching opening angle bracket has to exist |
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207 __ASSERT_ALWAYS (iInAngleBrackets, |
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208 User::Leave (KErrSipCodecTokenizer)); |
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209 |
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210 iInAngleBrackets = EFalse; |
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211 iAngleBracketCount++; |
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212 } |
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213 |
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214 // ----------------------------------------------------------------------------- |
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215 // CSIPTokenizer::HandleOpeningParenthesis |
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216 // ----------------------------------------------------------------------------- |
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217 // |
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218 void CSIPTokenizer::HandleOpeningParenthesis() |
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219 { |
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220 if (iInQuotes) |
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221 { |
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222 return; // ignore |
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223 } |
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224 |
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225 iInParenthesis = ETrue; |
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226 iParenthesisCount++; |
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227 } |
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228 |
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229 // ----------------------------------------------------------------------------- |
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230 // CSIPTokenizer::HandleClosingParenthesis |
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231 // ----------------------------------------------------------------------------- |
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232 // |
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233 void CSIPTokenizer::HandleClosingParenthesis() |
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234 { |
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235 if (iInQuotes) |
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236 { |
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237 return; // ignore |
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238 } |
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239 |
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240 iInParenthesis = EFalse; |
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241 iParenthesisCount++; |
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242 } |
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243 |
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244 // ----------------------------------------------------------------------------- |
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245 // CSIPTokenizer::CheckMatchingQuotesBracketsL |
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246 // ----------------------------------------------------------------------------- |
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247 // |
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248 void CSIPTokenizer::CheckMatchingQuotesBracketsL() |
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249 { |
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250 __ASSERT_ALWAYS (iQuoteCount%2 == 0, |
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251 User::Leave (KErrSipCodecTokenizer)); |
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252 |
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253 __ASSERT_ALWAYS (iAngleBracketCount%2 == 0, |
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254 User::Leave (KErrSipCodecTokenizer)); |
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255 |
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256 if(!iIgnoreParenthesis) |
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257 { |
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258 __ASSERT_ALWAYS (iParenthesisCount%2 == 0, |
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259 User::Leave (KErrSipCodecTokenizer)); |
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260 } |
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261 } |
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262 |
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263 // ----------------------------------------------------------------------------- |
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264 // CSIPTokenizer::HandleOtherCharacterL |
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265 // ----------------------------------------------------------------------------- |
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266 // |
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267 void CSIPTokenizer::HandleOtherCharacterL(const TChar& aChr) |
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268 { |
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269 __ASSERT_ALWAYS (iTokenLength > 0, |
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270 User::Leave (KErrSipCodecTokenizer)); |
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271 |
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272 if (iInQuotes || |
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273 iInAngleBrackets || |
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274 (iInParenthesis && !iIgnoreParenthesis)) |
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275 { |
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276 return; |
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277 } |
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278 |
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279 if (aChr != iSeparator) |
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280 { |
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281 return; |
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282 } |
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283 |
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284 TPtrC8 remainder(iLexer.Remainder()); |
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285 if (aChr == iSeparator && |
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286 iSkipSeparatorsBeforeAt && |
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287 remainder.Locate('@') >= 0) |
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288 { |
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289 CSIPTokenizer* atChrTokenizer = |
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290 CSIPTokenizer::NewLC( |
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291 remainder, '@', EFalse, ETrue, EFalse); |
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292 |
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293 TInt atCount = atChrTokenizer->Tokens().Count() - 1; |
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294 |
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295 CleanupStack::PopAndDestroy(atChrTokenizer); |
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296 |
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297 if (atCount > 0) |
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298 { |
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299 return; // skip the separators before '@' |
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300 } |
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301 } |
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302 |
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303 TUint startPos = iParsedSoFar - iTokenLength; |
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304 TPtrC8 token (iOriginalValue.Mid(startPos, iTokenLength-1)); |
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305 iTokens->AppendL(token); |
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306 |
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307 // Start a new token |
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308 iTokenLength = 0; |
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309 } |
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310 |
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311 // ----------------------------------------------------------------------------- |
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312 // CSIPTokenizer::AddLastTokenL |
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313 // ----------------------------------------------------------------------------- |
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314 // |
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315 void CSIPTokenizer::AddLastTokenL() |
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316 { |
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317 if ( iIgnoreLastEmptyValue && !(iTokenLength > 0)) |
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318 { |
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319 return; |
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320 } |
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321 |
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322 __ASSERT_ALWAYS (iTokenLength > 0, |
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323 User::Leave (KErrSipCodecTokenizer)); |
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324 |
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325 TUint startPos = iParsedSoFar - iTokenLength; |
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326 TPtrC8 token (iOriginalValue.Mid(startPos, iTokenLength)); |
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327 |
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328 iTokens->AppendL(token); |
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329 } |