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1 // Copyright (c) 2005-2009 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 // This file contains declarations of string methods used by |
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15 // XmlEngine's modules. |
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16 // |
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17 |
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18 #include <xml/utils/xmlengxestrings.h> |
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19 #include <xml/utils/xmlengmem.h> |
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20 #include <xml/utils/xmlengutils.h> |
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21 |
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22 #include <stdapis/libxml2/libxml2_xmlstring.h> |
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23 #include <stdapis/libxml2/libxml2_globals.h> |
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24 |
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25 #include <utf.h> |
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26 #include <escapeutils.h> |
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27 |
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28 //----------------------------------------------------------- TXmlEngConstString |
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29 |
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30 // ------------------------------------------------------------------------------ |
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31 // Compares two strings. |
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32 // |
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33 // @return Result as <b>strcmp()</b> |
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34 // ------------------------------------------------------------------------------ |
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35 // |
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36 EXPORT_C TBool TXmlEngConstString::Compare( |
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37 TXmlEngConstString aString ) const |
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38 { |
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39 char* str2 = aString.iString; |
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40 char* str1 = iString; |
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41 if (str1 == str2) |
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42 { |
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43 return(0); |
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44 } |
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45 if (!str1 && *str2 == '\x0') |
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46 { |
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47 return(0); |
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48 } |
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49 if (!str2 && *str1 == '\x0') |
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50 { |
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51 return(0); |
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52 } |
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53 if (!str1 ) |
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54 { |
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55 return(-1); |
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56 } |
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57 if (!str2 ) |
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58 { |
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59 return(1); |
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60 } |
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61 |
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62 register int tmp; |
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63 do { |
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64 tmp = *str1++ - *str2; |
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65 if (tmp != 0) |
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66 return(tmp); |
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67 } while (*str2++ != 0); |
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68 return 0; |
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69 } |
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70 |
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71 // ------------------------------------------------------------------------------ |
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72 // Returns copy of the TXmlEngConstString contents |
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73 // ------------------------------------------------------------------------------ |
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74 // |
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75 EXPORT_C char* TXmlEngConstString::CopyL() const |
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76 { |
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77 |
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78 xmlChar* copy = xmlStrdup((xmlChar*)iString); |
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79 OOM_IF(iString && !copy); |
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80 |
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81 return (char*) copy; |
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82 } |
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83 |
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84 |
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85 // ------------------------------------------------------------------------------ |
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86 // Returns size of string in bytes |
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87 // ------------------------------------------------------------------------------ |
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88 // |
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89 EXPORT_C TUint TXmlEngConstString::Size() const |
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90 { |
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91 if (iString) |
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92 { |
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93 return (TUint)strlen(iString); |
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94 } |
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95 return 0; |
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96 } |
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97 |
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98 // ------------------------------------------------------------------------------ |
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99 // @return Size of a string: a number of characters |
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100 // @note for non-ASCII contents <b>Size() != Length()</b> |
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101 // ------------------------------------------------------------------------------ |
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102 // |
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103 EXPORT_C TUint TXmlEngConstString::Length() const |
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104 { |
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105 // Note: return 0 for NULL strings |
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106 if(!iString) |
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107 return 0; |
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108 TInt len = xmlUTF8Strlen((const xmlChar*)iString); |
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109 return len != -1 ? (TUint)len : 0; |
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110 } |
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111 |
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112 //---------------------------------------------------------------------- TXmlEngString |
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113 |
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114 // ------------------------------------------------------------------------------ |
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115 // Frees the string |
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116 // ------------------------------------------------------------------------------ |
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117 // |
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118 EXPORT_C void TXmlEngString::Free() |
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119 {xmlFree(iString); iString = 0;} |
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120 |
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121 // ------------------------------------------------------------------------------ |
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122 // Transfers string and its ownership between TXmlEngString objects; |
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123 // |
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124 // Any previous content is freed. The source becomes empty (NULL). |
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125 // This allows reusing TXmlEngString variables and free them only once. |
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126 // |
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127 // @note |
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128 // This is only a convenience method: it allows avoiding many TXmlEngString variables |
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129 // and corresponding calls of Free() method for each. In practice, having a separate |
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130 // variable for string values makes code more clearer [No performance impact too]. |
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131 // ------------------------------------------------------------------------------ |
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132 // |
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133 EXPORT_C void TXmlEngString::Set(TXmlEngString& aSrc) |
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134 { |
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135 if(iString) |
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136 { |
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137 if(iString == aSrc.iString) |
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138 { |
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139 return; |
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140 } |
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141 else |
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142 { |
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143 delete iString; |
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144 } |
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145 } |
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146 iString = aSrc.iString; |
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147 aSrc.iString = 0; |
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148 } |
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149 |
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150 inline HBufC* HBufCFromXmlCharLC( |
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151 const void* aUtf8String ) |
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152 { |
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153 if (!aUtf8String) |
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154 return KNullDesC().AllocLC(); |
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155 |
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156 HBufC* res = CnvUtfConverter::ConvertToUnicodeFromUtf8L( |
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157 TPtrC8((TUint8*)aUtf8String, |
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158 strlen((char*)aUtf8String))); |
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159 CleanupStack::PushL(res); |
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160 return res; |
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161 } |
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162 |
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163 inline HBufC* HBufCFromXmlCharL( |
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164 const void* aUtf8String ) |
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165 { |
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166 if(!aUtf8String) |
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167 return KNullDesC().AllocL(); |
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168 else |
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169 return CnvUtfConverter::ConvertToUnicodeFromUtf8L( |
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170 TPtrC8((TUint8*)aUtf8String, |
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171 strlen((char*)aUtf8String))); |
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172 } |
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173 |
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174 /** |
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175 Allocates UTF-16 heap descriptor from the TDOMString contents |
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176 |
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177 Typical use: |
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178 @code |
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179 ... |
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180 HBufC* attrValue = attr.Value().AllocL(); |
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181 ... |
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182 @endcode |
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183 |
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184 AllocLC() does the same, but returned HBufC* is already on the cleanup stack |
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185 after a call to this method. |
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186 */ |
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187 EXPORT_C HBufC* TXmlEngConstString::AllocL(void) const |
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188 { |
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189 return HBufCFromXmlCharL(iString); // Note: it's inlined |
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190 } |
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191 |
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192 /** |
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193 Allocates UTF-16 heap descriptor from the TXmlEngConstString contents and |
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194 pushes the descriptor to cleanup stack. |
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195 |
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196 Typical use: |
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197 @code |
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198 ... |
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199 HBufC* attrValue = attr.Value().AllocLC(); |
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200 ... |
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201 @endcode |
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202 */ |
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203 EXPORT_C HBufC* TXmlEngConstString::AllocLC(void)const |
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204 { |
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205 return HBufCFromXmlCharLC(iString); // Note: it's inlined |
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206 } |
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207 |
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208 // ------------------------------------------------------------------------------ |
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209 // Initialize TDOMString from Symbian descriptor. |
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210 // |
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211 // UTF-16 content of descriptor is converted into UTF-8 zero-terminated |
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212 // c-string, for which memory is allocated. |
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213 // ------------------------------------------------------------------------------ |
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214 // |
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215 EXPORT_C void TXmlEngString::SetL(const TDesC& aDes) |
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216 { |
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217 if(iString) |
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218 PushL(); |
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219 char* str = const_cast<char*> (XmlEngXmlCharFromDesL(aDes)); |
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220 if (iString) |
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221 CleanupStack::PopAndDestroy(iString); |
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222 iString = str; |
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223 } |
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224 |
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225 // |
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226 // ------------------------------------------------------------------------------ |
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227 // Initialize TDOMString from Symbian descriptor. |
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228 // |
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229 // Byte content of descriptor is taken as UTF-8 string, |
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230 // and zero-terminated c-string is created from it. |
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231 // ------------------------------------------------------------------------------ |
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232 // |
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233 EXPORT_C void TXmlEngString::SetL(const TDesC8& aDes8) |
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234 { |
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235 if(iString) |
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236 PushL(); |
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237 char* str = const_cast<char*> (XmlEngXmlCharFromDes8L(aDes8)); |
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238 if (iString) |
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239 CleanupStack::PopAndDestroy(iString); |
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240 iString = str; |
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241 } |
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242 |
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243 // ------------------------------------------------------------------------------ |
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244 // Allocates heap descriptor as AllocL() and frees internal c-string. |
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245 // |
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246 // Typical use: |
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247 // @code |
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248 // ... |
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249 // HBufC* attrValue = attr.WholeValueCopyL().AllocAndFreeL(); |
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250 // ... |
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251 // @endcode |
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252 // |
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253 // AllocAndFreeLC() does the same, but returned HBufC* is already on the cleanup stack |
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254 // after a call to this method. |
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255 // ------------------------------------------------------------------------------ |
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256 // |
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257 EXPORT_C HBufC* TXmlEngString::AllocAndFreeL() |
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258 { |
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259 CleanupStack::PushL((TAny*)iString); // PushL() |
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260 HBufC* ret = HBufCFromXmlCharL(iString); // inlined AllocL(); |
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261 CleanupStack::PopAndDestroy(); |
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262 iString = NULL; |
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263 return ret; |
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264 } |
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265 |
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266 /** |
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267 Allocates heap descriptor as AllocLC() and frees internal c-string. |
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268 |
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269 More details in AllocAndFreeL() description. |
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270 */ |
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271 EXPORT_C HBufC* TXmlEngString::AllocAndFreeLC() |
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272 { |
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273 // inlined AllocAndFreeL(): |
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274 CleanupStack::PushL((TAny*)iString); // PushL() |
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275 HBufC* hbuf = HBufCFromXmlCharL(iString); // inlined AllocL(); |
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276 CleanupStack::PopAndDestroy(); // iString |
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277 iString = NULL; |
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278 // |
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279 CleanupStack::PushL(hbuf); |
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280 return hbuf; |
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281 } |
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282 |
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283 |
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284 EXPORT_C void TXmlEngString::AppendL(TXmlEngString str) |
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285 { |
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286 if(str.iString) |
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287 { |
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288 TUint len1 = iString ? Size(): 0; |
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289 TUint len2 = str.Size(); |
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290 char* res = new (ELeave) char[len1 + len2 + 1]; |
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291 OOM_IF_NULL(res); |
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292 if (iString) |
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293 memcpy(res, iString, len1); |
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294 memcpy(res+len1, str.iString, len2); |
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295 res[len1+len2] = 0; |
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296 delete iString; |
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297 iString = res; |
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298 } |
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299 } |
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300 |
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301 EXPORT_C void TXmlEngString::AppendL(TXmlEngString str1, TXmlEngString str2) |
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302 { |
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303 AppendL(str1); |
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304 AppendL(str2); |
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305 } |
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306 |