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1 /* |
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2 * Copyright (c) 2003-2009 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 * Name : SdpUtil.h |
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16 * Part of : SDP Codec |
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17 * Interface : - |
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18 * Version : 1.0 |
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19 * |
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20 */ |
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21 |
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22 |
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23 |
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24 |
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25 /** |
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26 @internalComponent |
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27 */ |
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28 |
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29 #ifndef SDPUTIL_H |
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30 #define SDPUTIL_H |
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31 |
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32 // INCLUDES |
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33 #include <e32base.h> |
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34 #include <stringpool.h> |
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35 #include <e32std.h> |
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36 #include "_sdpdefs.h" |
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37 |
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38 // FORWARD DECLARATIONS |
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39 class RReadStream; |
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40 class RWriteStream; |
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41 class CSdpConnectionField; |
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42 class CSSdpKeyField; |
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43 class CSdpOriginField; |
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44 class TInetAddr; |
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45 |
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46 // CLASS DECLARATION |
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47 /** |
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48 * Common utilities used in the implementation of the SDP codec. |
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49 * Utility class, cannot be instantiated |
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50 */ |
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51 class SdpUtil |
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52 { |
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53 |
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54 public: // New functions |
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55 |
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56 /** |
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57 * Generic method that checks that all aValue's chars are not on illegal charset |
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58 * |
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59 * @param aIllegalChars Illegal character set |
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60 * @param aValue String to be checked |
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61 * @param aStart Start position of the string |
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62 * @param aEnd End position of the string |
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63 * @return Validity of the string |
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64 */ |
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65 static TBool IsValidCharSet( |
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66 const TDesC8& aIllegalChars, const TDesC8& aValue, TInt aStart, TInt aEnd ); |
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67 |
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68 /** |
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69 * Checks that token list is valid (tokens with space as delimiter) |
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70 * |
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71 * @param aValue String containing tokens |
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72 * @return Validity of the string |
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73 */ |
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74 static TBool IsTokenList( const TDesC8& aValue ); |
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75 |
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76 /** |
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77 * Checks that the token is valid (substring inside string) |
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78 * |
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79 * @param aValue String containing the token |
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80 * @param aStart Start position of the token inside the string |
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81 * @param aEnd End position of the token inside the string |
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82 * @return Validity of the token |
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83 */ |
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84 static TBool IsToken( const TDesC8& aValue, TInt aStart, TInt aEnd ); |
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85 |
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86 /** |
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87 * Checks that the token is valid |
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88 * |
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89 * @param aValue Token string |
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90 * @return Validity of the token |
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91 */ |
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92 static TBool IsToken( const TDesC8& aValue ); |
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93 |
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94 /** |
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95 * Checks that the byte string is valid (substring inside string) |
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96 * |
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97 * @param aValue String |
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98 * @param aStart Start position of the byte string inside the string |
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99 * @param aEnd End position of the byte string inside the string |
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100 * @return Validity of the byte string |
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101 */ |
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102 static TBool IsByteString( const TDesC8& aValue, TInt aStart, TInt aEnd ); |
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103 |
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104 /** |
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105 * Checks that the byte string is valid |
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106 * |
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107 * @param aValue String containing the token |
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108 * @return Validity of the byte string |
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109 */ |
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110 static TBool IsByteString( const TDesC8& aValue ); |
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111 |
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112 /** |
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113 * Checks that the substring is a token-byte string pair with colon char |
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114 * as delimiter of the two strings |
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115 * |
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116 * @param aValue String containing the pair |
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117 * @param aStart Start position of the string pair |
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118 * @param aEnd End position of the string pair |
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119 * @return Validity of the pair |
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120 */ |
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121 static TBool IsTokenTextPair( |
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122 const TDesC8& aValue, TInt aStart, TInt aEnd ); |
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123 |
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124 /** |
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125 * Checks that the string conatins valid token-byte string pair with color |
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126 * char as delimiter of the two strings |
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127 * |
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128 * @param aValue String containing the pair |
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129 * @return Validity of the byte string |
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130 */ |
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131 static TBool IsTokenTextPair( const TDesC8& aValue ); |
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132 |
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133 /** |
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134 * Checks that the string does not contain any whitespace characters |
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135 * |
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136 * @param aValue String |
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137 * @return Validity of the string |
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138 */ |
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139 static TBool IsNonWhitespace( const TDesC8& aValue ); |
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140 |
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141 /** |
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142 * Checks that the string contains a valid NTP-time element |
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143 * |
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144 * @param aValue String |
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145 * @return Validity of the string |
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146 */ |
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147 static TBool IsValidNtpTime( const TDesC8& aValue ); |
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148 |
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149 /** |
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150 * Divides the buffer into a number of lines. Each line is marked |
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151 * as a TPtrC8 object and added to array that is returned to the user |
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152 * NOTE! Each line in the returned array ends in LF character |
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153 * NOTE! The aLines must end in LF character, not '\0' character |
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154 * |
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155 * @param aLines Buffer that contains all the string |
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156 * @param aErrCode Error code that is used on leave situations, when the |
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157 * aLines parameter contains invalid string set |
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158 * @return Array that contains the division of buffer to lines |
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159 */ |
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160 static RArray<TPtrC8> DivideToLinesL( |
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161 const TDesC8& aLines, TInt aErrCode ); |
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162 |
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163 /** |
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164 * Parses elements from each line. The first item in the returned array |
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165 * is the field attribute and equal character (e.g. "a=", "c="), following |
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166 * elements are parsed from the string using space character as delimiter |
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167 * |
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168 * @param aLine String containing line that ends to LF character |
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169 * @param aErrCode Error code that is used on leave situations, when |
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170 * the contents of aLine are illegal |
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171 * @return Array that contains the division of string to elements |
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172 */ |
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173 static RArray<TPtrC8> GetElementsFromLineL( |
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174 const TDesC8& aLine, TInt aErrCode ); |
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175 |
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176 /** |
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177 * Parses elements from each line. The first item in the returned array |
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178 * is the field attribute and equal character (e.g. "a=", "c="), following |
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179 * elements are parsed from the string using aDelimiter as delimiter |
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180 * |
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181 * @param aLine String containing line that ends to LF character |
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182 * @param aDelimiter Delimiter character |
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183 * @param aErrCode Error code that is used on leave situations, when |
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184 * the contents of aLine are illegal |
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185 * @return Array that contains the division of string to elements |
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186 */ |
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187 static RArray<TPtrC8> GetElementsFromLineL( |
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188 const TDesC8& aLine, TChar aDelimiter, TInt aErrCode ); |
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189 |
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190 /** |
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191 * Parses elements from each line. The first item in the returned array |
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192 * is the field attribute and equal character (e.g. "a=", "c="), following |
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193 * elements are parsed from the string using space character as delimiter |
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194 * |
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195 * @param aLexer Lexer that has been initialized with the string |
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196 * @param aErrCode Error code that is used on leave situations, when |
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197 * the contents of aLine are illegal |
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198 * @return Array that contains the division of string to elements |
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199 */ |
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200 static RArray<TPtrC8> GetElementsFromLineL( |
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201 TLex8& aLexer, TChar aDelimiter, TInt aErrCode ); |
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202 |
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203 /** |
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204 * Checks if the string contains only POS-DIGIT characters |
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205 * |
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206 * @param aDes String |
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207 * @return Validity of POS-DIGIT string |
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208 */ |
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209 static TBool IsPosDigit( const TDesC8& aDes ); |
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210 |
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211 /** |
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212 * Checks if the string contains only DIGIT characters |
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213 * |
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214 * @param aDes String |
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215 * @return Validity of DIGIT string |
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216 */ |
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217 static TBool IsDigit( const TDesC8& aDes ); |
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218 |
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219 /** |
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220 * Checks if the string contains valid characters |
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221 * |
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222 * @param aValidChars Valid characters allowed in the string |
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223 * @param aDes String |
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224 * @return Validity of the string |
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225 */ |
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226 static TBool IsValidChars( const TDesC8& aValidChars, const TDesC8& aDes ); |
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227 |
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228 /** |
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229 * Checks if the string contains only token characters |
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230 * |
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231 * @param aValue String |
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232 * @return Validity of the string |
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233 */ |
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234 static TBool IsTokenChar( const TDesC8& aValue ); |
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235 |
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236 /** |
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237 * Checks if the character is a valid token character |
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238 * |
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239 * @param aChar Character |
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240 * @return Validity of the character |
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241 */ |
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242 static TBool IsTokenChar( TChar aChar ); |
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243 |
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244 /** |
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245 * Checks if the string is a valid token. The string can contain slash character, |
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246 * which divides the line into two tokens. The two tokens are then individually |
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247 * verified. |
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248 * |
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249 * @param aValue String |
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250 * @return Validity of the string |
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251 */ |
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252 static TBool IsTokenCharWithOptionalSlash( const TDesC8& aValue ); |
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253 |
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254 /** |
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255 * Checks if the string is a valid token. The string can contain space characters, |
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256 * which divides the string into a number of tokens. Each token is then individually |
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257 * verified. |
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258 * |
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259 * @param aValue String |
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260 * @return Validity of the string |
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261 */ |
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262 static TBool IsTokenCharWithSpacesL( const TDesC8& aValue ); |
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263 |
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264 /** |
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265 * Checks if the string is a valid token. The string can contain slash character, |
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266 * which divides the line into two tokens. The two tokens are then individually |
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267 * verified. |
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268 * |
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269 * @param aValue String |
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270 * @return Validity of the string |
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271 */ |
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272 static void EncodeBufferL( |
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273 const TDesC8& aValue, TInt aIndex, RWriteStream& aStream ); |
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274 |
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275 /** |
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276 * Sets default network type ("IN") and default address type ("IP4" or "IP6") |
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277 * to variables given as parameters |
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278 * |
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279 * @param aPool String pool |
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280 * @param aInetAddr Internet address |
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281 * @param aNetType Network type |
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282 * @param aAddressType Address type |
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283 */ |
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284 static void SetDefaultNetTypeAndAddrType( |
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285 RStringPool aPool, const TInetAddr& aAddress, |
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286 RStringF& aNetType, RStringF& aAddressType ); |
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287 |
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288 /** |
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289 * Skips spaces until next line break, if the line break can be found. |
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290 * @param aLexer |
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291 * @return ETrue if the line break was found, otherwise EFalse. |
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292 */ |
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293 static TBool SkipSpacesUntilNextLineBreak( TLex8& aLexer ); |
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294 |
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295 private: |
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296 |
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297 /** |
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298 * After the field tag has been parsed out, all the field elements are |
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299 * parsed in this method |
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300 * |
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301 * @param aArray Reference to the array that contains the chopped elements |
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302 * @param aLexer Used lexer |
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303 * @param aDelimiter Delimiter character that determines the separation of elements |
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304 * @param aErrCode The error code that is used on leaves, when the argument is invalid |
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305 */ |
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306 static void ChopElementsFromLineL( |
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307 RArray<TPtrC8>& aArray, TLex8& aLexer, TChar aDelimiter, TInt aErrCode ); |
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308 |
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309 /** |
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310 * Private constructor |
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311 * This class can never be instantiated |
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312 */ |
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313 SdpUtil(); |
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314 }; |
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315 |
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316 #endif |