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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 using System; |
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18 using System.Collections.Generic; |
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19 using System.Text; |
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20 using SymbianUtils.SourceParser.Objects; |
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21 using SymbianUtils.SourceParser.Parsers; |
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22 |
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23 namespace SymbianUtils.SourceParser.Parsers |
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24 { |
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25 public class ParserSrcMethod |
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26 { |
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27 #region Constructors |
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28 public ParserSrcMethod() |
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29 { |
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30 } |
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31 #endregion |
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32 |
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33 #region API |
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34 public SrcMethod Parse( ref string aText ) |
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35 { |
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36 SrcMethod ret = null; |
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37 // |
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38 if ( aText.Length > 0 ) |
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39 { |
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40 string parameters = string.Empty; |
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41 // |
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42 if ( ContainsParameters( aText ) ) |
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43 { |
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44 // This leaves modifiers intact |
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45 parameters = ExtractParameters( ref aText ); |
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46 } |
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47 |
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48 // Look for the class separator. If we find that, then everything after |
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49 // it is the method name. |
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50 // |
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51 // If no class separator exists, then we treat the whole thing as the method |
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52 // name. |
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53 int pos = aText.IndexOf( SrcClass.KClassSeparator ); |
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54 |
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55 // By default, treat the whole text as the class name |
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56 string methodText = aText; |
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57 if ( pos >= 0 ) |
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58 { |
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59 methodText = aText.Substring( pos + SrcClass.KClassSeparator.Length ); |
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60 aText = aText.Substring( 0, pos + SrcClass.KClassSeparator.Length ); |
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61 } |
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62 else |
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63 { |
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64 // Everything was consumed... |
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65 aText = string.Empty; |
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66 } |
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67 |
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68 // Make a new method. Work out if the method text |
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69 // actually has any parameters |
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70 ret = new SrcMethod(); |
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71 |
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72 // Try to parse the modifiers. We extract that first |
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73 // to leave us with just the method name and the parameters. |
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74 bool hasModifier = ContainsModifier( methodText ); |
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75 if ( hasModifier ) |
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76 { |
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77 ParserSrcMethodModifier parser = new ParserSrcMethodModifier(); |
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78 SrcMethodModifier modifier = parser.Parse( ref methodText ); |
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79 if ( modifier != null ) |
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80 { |
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81 ret.Modifier = modifier; |
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82 } |
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83 } |
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84 |
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85 // Try to parse the parameters. We can also use this |
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86 // to calculate the exact method name. |
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87 if ( parameters.Length > 0 ) |
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88 { |
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89 ParserSrcMethodParameter parser = new ParserSrcMethodParameter(); |
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90 parser.Parse( ref parameters, ret ); |
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91 } |
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92 |
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93 // What's left should be the method name followed by "()" if the |
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94 // 'method' wasn't a label. |
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95 if ( ContainsParameters( methodText ) ) |
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96 { |
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97 // Discard "()"; |
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98 pos = methodText.LastIndexOf( "(" ); |
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99 methodText = methodText.Substring( 0, pos ); |
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100 } |
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101 |
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102 ret.Name = methodText; |
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103 } |
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104 // |
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105 return ret; |
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106 } |
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107 #endregion |
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108 |
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109 #region Properties |
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110 #endregion |
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111 |
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112 #region Internal methods |
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113 private static bool ContainsParameters( string aText ) |
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114 { |
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115 // Search initiall for '(' - if that is found, then |
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116 // we should also find a closing bracket. |
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117 bool parameters = false; |
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118 int openingBracketPos = aText.IndexOf( "(" ); |
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119 // |
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120 if ( openingBracketPos > 0 ) |
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121 { |
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122 // Should also be a closing bracket and it should |
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123 // appear after the opening bracket |
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124 int closingBracketPos = aText.LastIndexOf( ")" ); |
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125 parameters = ( closingBracketPos > openingBracketPos ); |
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126 } |
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127 // |
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128 return parameters; |
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129 } |
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130 |
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131 private static bool ContainsModifier( string aText ) |
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132 { |
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133 bool modifiers = false; |
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134 |
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135 int openingBracketPos = aText.IndexOf( "(" ); |
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136 if ( openingBracketPos >= 0 ) |
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137 { |
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138 int closingBracketPos = openingBracketPos; |
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139 SymbianUtils.Strings.StringParsingUtils.SkipToEndOfSection( ref aText, ref closingBracketPos, '(', ')' ); |
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140 |
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141 if ( closingBracketPos > openingBracketPos ) |
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142 { |
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143 // everything here on is the modifier text; |
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144 string modifierText = aText.Substring( closingBracketPos + 1 ); |
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145 modifiers = ( modifierText.Trim().Length > 0 ); |
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146 } |
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147 } |
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148 // |
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149 return modifiers; |
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150 } |
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151 |
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152 private static string ExtractParameters( ref string aText ) |
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153 { |
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154 const string KOperatorChevronText = "operator <<"; |
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155 |
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156 // DoAppendFormatList<TDes16, (int)2>(T1&, const T3&, std::__va_list, T2*) |
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157 // DoAppendFormatList<TDes16, (int)2>(T1&, TBuf<(int)256>, std::__va_list, T2*) |
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158 // Method<TDes16>::Wibble( something ) |
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159 // Method::Wibble( RPointerArray<HBufC> ) |
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160 // RTest::operator ()(int, int, const unsigned short*) |
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161 // TDesC16::Left(int) const |
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162 // CObjectCon::AtL(int) const |
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163 // User::Panic(const TDesC16&, int) |
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164 // operator <<(RWriteStream&, const unsigned char&) |
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165 |
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166 // Handle special case of "operator <<" confusing matters |
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167 string workingText = aText; |
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168 int operatorOpeningChevronPos = aText.IndexOf( KOperatorChevronText ); |
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169 if ( operatorOpeningChevronPos >= 0 ) |
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170 { |
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171 aText = aText.Substring( 0, operatorOpeningChevronPos + KOperatorChevronText.Length ); |
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172 workingText = workingText.Substring( operatorOpeningChevronPos + KOperatorChevronText.Length ); |
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173 } |
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174 else |
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175 { |
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176 aText = string.Empty; |
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177 } |
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178 |
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179 string ret = string.Empty; |
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180 // |
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181 int closingPos = 0; |
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182 int openingPos = 0; |
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183 int templatePos = 0; |
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184 // |
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185 while ( openingPos >= 0 ) |
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186 { |
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187 if ( templatePos >= 0 ) |
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188 templatePos = workingText.IndexOf( "<", templatePos ); |
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189 openingPos = workingText.IndexOf( "(", openingPos ); |
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190 |
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191 if ( templatePos >= 0 && templatePos < openingPos ) |
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192 { |
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193 // Template region appears before the next bracket. Skip |
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194 // over all characters until we hit the end of the template |
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195 // section |
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196 int endingPos = templatePos; |
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197 SymbianUtils.Strings.StringParsingUtils.SkipToEndOfSection( ref workingText, ref endingPos, '<', '>' ); |
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198 |
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199 if ( endingPos < 0 ) |
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200 { |
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201 // Matching closing brace was never found - dealing with operator << ? |
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202 templatePos = -1; |
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203 } |
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204 else |
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205 { |
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206 // Something like DoAppendFormatList<TDes16, (int)2>(T1&, const T3&, std::__va_list, T2*) ??? |
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207 templatePos = endingPos; |
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208 openingPos = endingPos; |
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209 } |
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210 } |
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211 else if ( openingPos >= 0 ) |
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212 { |
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213 // Skipped over any template nonsense. Work backward from the end |
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214 // in order to locate start of parameters. |
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215 closingPos = workingText.LastIndexOf( ')' ); |
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216 openingPos = closingPos; |
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217 SymbianUtils.Strings.StringParsingUtils.SkipToBeginningOfSection( ref workingText, ref openingPos, '(', ')' ); |
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218 |
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219 string parameters = workingText.Substring( openingPos + 1, ( closingPos - openingPos ) - 1 ).Trim(); |
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220 ret = parameters; |
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221 workingText = workingText.Substring( 0, openingPos + 1 ) + workingText.Substring( closingPos ); |
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222 aText = aText + workingText; |
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223 break; |
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224 } |
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225 } |
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226 // |
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227 return ret; |
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228 } |
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229 #endregion |
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230 |
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231 #region Data members |
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232 #endregion |
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233 } |
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234 } |