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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 the License "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 // |
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15 |
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16 /** |
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17 @internalComponent |
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18 */ |
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19 inline TBool IsSurrogate(TText a) |
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20 { |
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21 return 0xD800 == (a & 0xF800); |
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22 } |
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23 |
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24 /** |
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25 @internalComponent |
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26 */ |
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27 inline TBool IsHighSurrogate(TText a) |
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28 { |
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29 return 0xD800 == (a & 0xFC00); |
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30 } |
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31 |
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32 /** |
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33 @internalComponent |
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34 */ |
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35 inline TBool IsLowSurrogate(TText a) |
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36 { |
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37 return 0xDC00 == (a & 0xFC00); |
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38 } |
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39 |
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40 /** |
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41 @internalComponent |
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42 */ |
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43 inline TChar PairSurrogates(TText aHigh, TText aLow) |
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44 { |
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45 return ((aHigh - 0xd7f7) << 10) + aLow; |
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46 } |
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47 |
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48 inline void SkipCombiningCharacters(TUTF32Iterator& aUTF32It) |
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49 { |
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50 while(!aUTF32It.AtEnd() && !::IsBaseCharacter(aUTF32It.Current())) |
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51 { |
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52 aUTF32It.Next(); |
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53 } |
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54 } |
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55 |
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56 //////////////////////////////////////////////////////////////////////////////////////////// |
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57 // TUTF32Iterator |
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58 //////////////////////////////////////////////////////////////////////////////////////////// |
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59 |
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60 /** |
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61 @internalComponent |
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62 */ |
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63 inline TUTF32Iterator::TUTF32Iterator() : |
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64 iStart(0), |
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65 iEnd(0) |
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66 { |
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67 } |
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68 |
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69 /** |
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70 @internalComponent |
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71 */ |
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72 inline TUTF32Iterator::TUTF32Iterator(const TText16* aSingleton) : |
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73 iStart(aSingleton), |
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74 iEnd(aSingleton + 1), |
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75 iCurrent(*aSingleton) |
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76 { |
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77 ASSERT((iCurrent & 0xFFFE) != 0xFFFE); |
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78 ASSERT(!::IsSurrogate(*aSingleton)); |
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79 } |
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80 |
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81 /** |
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82 @internalComponent |
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83 */ |
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84 inline TUTF32Iterator::TUTF32Iterator(const TText16* aStart, const TText16* aEnd) : |
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85 iEnd(aEnd) |
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86 { |
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87 SetStart(aStart); |
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88 } |
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89 |
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90 /** |
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91 Sets the iteration to begin at aStart. |
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92 @param aStart New starting point of iteration. |
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93 @internalComponent |
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94 */ |
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95 inline void TUTF32Iterator::SetStart(const TText16* aStart) |
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96 { |
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97 iStart = aStart; |
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98 if(iStart != iEnd) |
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99 { |
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100 if(::IsSurrogate(iEnd[-1])) |
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101 { |
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102 --iEnd; |
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103 if(iStart == iEnd) |
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104 { |
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105 return; |
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106 } |
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107 } |
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108 iCurrent = ::UTF16ToChar(iStart); |
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109 if(iCurrent == 0xFFFF) |
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110 { |
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111 Next(); |
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112 } |
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113 } |
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114 } |
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115 |
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116 /** |
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117 @internalComponent |
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118 */ |
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119 inline TUTF32Iterator::TUTF32Iterator(const TText16* aStart, const TText16* aEnd, TStartsWithValidCharacter) : |
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120 iStart(aStart), |
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121 iEnd(aEnd) |
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122 { |
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123 ASSERT(iStart < iEnd); |
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124 if(::IsSurrogate(iEnd[-1])) |
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125 { |
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126 --iEnd; |
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127 } |
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128 iCurrent = ::UTF16ToChar(iStart); |
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129 ASSERT(iCurrent != 0xFFFF); |
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130 } |
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131 |
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132 /** |
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133 @internalComponent |
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134 */ |
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135 inline TUTF32Iterator TUTF32Iterator::CurrentAsIterator() const |
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136 { |
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137 TUTF32Iterator retval(*this); |
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138 ASSERT(iStart != iEnd); |
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139 retval.iEnd = iStart + 1; |
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140 return retval; |
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141 } |
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142 |
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143 /** |
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144 @internalComponent |
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145 */ |
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146 inline TBool TUTF32Iterator::AtEnd() const |
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147 { |
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148 return iEnd == iStart; |
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149 } |
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150 |
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151 /** |
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152 @internalComponent |
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153 */ |
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154 inline TChar TUTF32Iterator::Current() const |
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155 { |
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156 ASSERT(iStart != iEnd); |
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157 ASSERT(iCurrent != 0xFFFF); |
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158 return iCurrent; |
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159 } |
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160 |
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161 /** |
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162 @internalComponent |
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163 */ |
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164 inline const TText16* TUTF32Iterator::CurrentPosition() const |
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165 { |
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166 return iStart; |
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167 } |
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168 |
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169 /** |
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170 @internalComponent |
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171 */ |
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172 inline TInt TUTF32Iterator::Length() const |
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173 { |
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174 return iEnd - iStart; |
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175 } |
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176 |
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177 /** |
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178 @internalComponent |
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179 */ |
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180 inline TInt TUTF32Iterator::operator[](TInt a) const |
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181 { |
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182 return iStart[a]; |
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183 } |
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184 |
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185 //////////////////////////////////////////////////////////////////////////////////////////// |
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186 // TFoldedDecompIterator |
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187 //////////////////////////////////////////////////////////////////////////////////////////// |
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188 |
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189 /** |
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190 @internalComponent |
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191 */ |
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192 inline TFoldedDecompIterator::TFoldedDecompIterator() |
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193 { |
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194 } |
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195 |
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196 /** |
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197 @internalComponent |
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198 */ |
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199 inline TUTF32Iterator TFoldedDecompIterator::BaseIterator() const |
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200 { |
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201 return iOriginal; |
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202 } |
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203 |
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204 /** |
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205 @internalComponent |
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206 */ |
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207 inline void TFoldedDecompIterator::Set(const TUTF32Iterator& a) |
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208 { |
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209 iOriginal = a; |
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210 } |
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211 |
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212 /** |
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213 @internalComponent |
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214 */ |
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215 inline TBool TFoldedDecompIterator::IsInFoldedSequence() const |
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216 { |
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217 return !iFolded.AtEnd(); |
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218 } |
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219 |
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220 //////////////////////////////////////////////////////////////////////////////////////////// |
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221 // TFoldedSortedDecompIterator |
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222 //////////////////////////////////////////////////////////////////////////////////////////// |
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223 |
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224 /** |
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225 @internalComponent |
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226 */ |
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227 inline TFoldedSortedDecompIterator::TFoldedSortedDecompIterator() |
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228 { |
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229 } |
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230 |
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231 //////////////////////////////////////////////////////////////////////////////////////////// |
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232 // TDecompositionIterator |
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233 //////////////////////////////////////////////////////////////////////////////////////////// |
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234 |
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235 /** |
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236 @internalComponent |
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237 */ |
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238 inline TDecompositionIterator::TDecompositionIterator() |
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239 { |
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240 } |
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241 |
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242 //////////////////////////////////////////////////////////////////////////////////////////// |
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243 // TCanonicalDecompositionIterator |
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244 //////////////////////////////////////////////////////////////////////////////////////////// |
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245 |
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246 /** |
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247 @internalComponent |
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248 */ |
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249 inline TCanonicalDecompositionIterator::TCanonicalDecompositionIterator() |
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250 { |
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251 } |
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252 |