1 delimitedparser16.h |
1 // Copyright (c) 2001-2009 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 the License "Symbian Foundation License v1.0" to Symbian Foundation members and "Symbian Foundation End User License Agreement v1.0" to non-members |
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5 // which accompanies this distribution, and is available |
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6 // at the URL "http://www.symbianfoundation.org/legal/licencesv10.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 // This file contains the API definition for the classes TDelimitedParserBase16 |
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15 // and CDelimitedData16. |
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16 // |
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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 @file DelimitedParser16.h |
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23 @publishedAll |
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24 @released |
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25 */ |
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26 |
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27 #ifndef __DELIMITEDPARSER16_H__ |
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28 #define __DELIMITEDPARSER16_H__ |
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29 |
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30 // System includes |
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31 // |
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32 #include <e32base.h> |
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33 #include <delimitedparsercommon.h> |
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34 |
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35 |
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36 /** |
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37 Comments : Provides non-modifying functionality for parsing data delimited by |
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38 a single character. The data is delimited into segments. Uses 16-bit descriptors. |
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39 |
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40 The object contains a descriptor with the data which can be parsed from left |
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41 to right, or right to left. It is non-owning. The current segment can be extracted, |
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42 which then parses the string for the next segment. |
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43 |
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44 This is a base class and an object of this type cannot be instantiated. It should |
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45 be derived. The derived class should ensure that the data iDataDes is set before |
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46 calling one of the protected parsing functions. The derived class should also ensure |
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47 that the delimiting character has been set. |
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48 |
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49 If the data iDataDes has not been parsed, then calling any functionality that |
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50 requires the data to have been parsed will result in a panic |
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51 KDelimitedParserErrNotParsed. The data can only be parsed by calling one of the |
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52 protected parsing functions from the derived class. |
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53 |
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54 If the delimiting character iDelimiter has not been set, then calling the protected |
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55 parsing functions and some of the other public functionality that requires the |
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56 delimiter to be set will result in a panic KDelimitingParserErrNoDelimiter. |
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57 @publishedAll |
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58 @released |
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59 @since 6.0 |
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60 */ |
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61 class TDelimitedParserBase16 |
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62 { |
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63 public: // Methods |
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64 |
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65 IMPORT_C void Reset() const; |
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66 |
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67 IMPORT_C TInt GetNext(TPtrC16& aSegment) const; |
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68 |
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69 IMPORT_C TInt Inc() const; |
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70 |
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71 IMPORT_C TInt Dec() const; |
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72 |
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73 IMPORT_C TInt Peek(TPtrC16& aSegment) const; |
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74 |
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75 IMPORT_C TBool Eos() const; |
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76 |
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77 IMPORT_C TBool FrontDelimiter() const; |
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78 |
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79 IMPORT_C TBool BackDelimiter() const; |
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80 |
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81 IMPORT_C const TDesC16& Des() const; |
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82 |
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83 IMPORT_C TInt Remainder(TPtrC16& aRemainder) const; |
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84 |
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85 protected: // Methods |
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86 |
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87 IMPORT_C TDelimitedParserBase16(); |
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88 |
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89 IMPORT_C void Parse(const TDesC16& aData); |
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90 |
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91 IMPORT_C void ParseReverse(const TDesC16& aData); |
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92 |
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93 IMPORT_C void SetDelimiter(TChar aDelimiter); |
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94 |
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95 private: // Methods |
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96 |
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97 void DoParse(const TDesC16& aData); |
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98 |
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99 TInt FindNextSegment(TInt aStartPos) const; |
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100 |
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101 TInt FindPrevSegment(TInt aStartPos) const; |
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102 |
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103 private: // Attributes |
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104 |
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105 /** Descriptor with the string |
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106 */ |
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107 TPtrC16 iDataDes; |
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108 |
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109 /** Descriptor with the current segment. |
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110 */ |
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111 mutable TPtrC16 iCurrentSegment; |
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112 |
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113 /** Position of next segment. |
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114 */ |
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115 mutable TInt iNextSegmentPos; |
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116 |
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117 /** Direction of parsing. |
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118 */ |
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119 TDelimitedDataParseMode iMode; |
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120 |
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121 /** Delimiting character |
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122 */ |
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123 TInt iDelimiter; |
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124 |
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125 /** |
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126 A friend class. |
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127 @see CDelimitedDataBase16 |
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128 @since 6.0 |
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129 */ |
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130 friend class CDelimitedDataBase16; |
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131 |
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132 }; |
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133 |
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134 /** |
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135 typedef |
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136 @publishedAll |
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137 @released |
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138 */ |
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139 typedef TDelimitedParserBase16 TDelimitedParserBase; |
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140 |
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141 /** |
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142 Dependencies : CBase, TDelimitedParserBase16 |
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143 Comments : Provides functionality for creating and editing a delimited data object. |
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144 Uses 16-bit descriptors |
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145 |
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146 The object contains a descriptor buffer with the data. Functionality is provided |
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147 to allow segments to be added or removed from the data. There is access to the |
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148 internal delimited data parser to provide parsing functionality to be excercised |
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149 on the created data. |
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150 |
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151 This a base class that cannot be instantiated. It should be derived. The derived |
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152 class must set the delimited data parser, which is an object derived from |
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153 TDelimitedParserBase. This helper class must set the delimiting object |
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154 |
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155 If the delimiting character has not been set, then calling any of the functionality |
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156 will cause a panic KDelimitedParserErrNoDelimiter. |
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157 @publishedAll |
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158 @released |
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159 @since 6.0 |
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160 */ |
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161 class CDelimitedDataBase16 : public CBase |
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162 { |
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163 public: // Methods |
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164 |
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165 |
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166 IMPORT_C ~CDelimitedDataBase16(); |
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167 |
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168 IMPORT_C void InsertCurrentL(const TDesC16& aSegment); |
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169 |
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170 IMPORT_C void RemoveCurrentL(); |
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171 |
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172 IMPORT_C void PushBackL(const TDesC16& aSegment); |
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173 |
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174 IMPORT_C void PopBackL(); |
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175 |
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176 IMPORT_C void PushFrontL(const TDesC16& aSegment); |
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177 |
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178 IMPORT_C void PopFrontL(); |
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179 |
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180 IMPORT_C void TrimFrontDelimiterL(); |
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181 |
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182 IMPORT_C void AddFrontDelimiterL(); |
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183 |
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184 IMPORT_C void TrimBackDelimiterL(); |
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185 |
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186 IMPORT_C void AddBackDelimiterL(); |
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187 |
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188 IMPORT_C void Parse(); |
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189 |
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190 IMPORT_C void ParseReverse(); |
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191 |
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192 IMPORT_C const TDelimitedParserBase16& Parser() const; |
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193 |
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194 protected: // Methods |
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195 |
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196 IMPORT_C CDelimitedDataBase16(); |
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197 |
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198 IMPORT_C void ConstructL(const TDesC16& aData); |
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199 |
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200 IMPORT_C void SetDelimiter(TChar aDelimiter); |
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201 |
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202 private: // Methods |
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203 |
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204 void SetDataL(const TDesC16& aData); |
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205 |
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206 void SetData(HBufC16* aDataBuf); |
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207 |
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208 void DoInsertL(const TDesC16& aSegment); |
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209 |
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210 void DoRemoveL(); |
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211 |
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212 private: // Attributes |
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213 |
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214 /** Descriptor buffer. |
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215 */ |
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216 HBufC16* iDataBuf; |
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217 |
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218 /** Parser object |
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219 */ |
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220 TDelimitedParserBase16 iParser; |
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221 |
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222 }; |
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223 |
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224 /** |
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225 typedef |
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226 @publishedAll |
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227 @released |
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228 */ |
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229 typedef CDelimitedDataBase16 CDelimitedDataBase; |
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230 |
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231 #endif // __DELIMITEDPARSER16_H__ |