1 | ' Classes/System/String.ab
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2 |
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3 | #require <basic/function.sbp>
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4 |
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5 | Class String
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6 | m_Length As Long
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7 | Public
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8 | Chars As *Char
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9 |
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10 | Sub String()
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11 | Chars = _System_calloc(SizeOf (Char) * 1)
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12 | m_Length = 0
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13 | End Sub
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14 |
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15 | Sub String(initStr As *Char)
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16 | String()
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17 | Assign(initStr)
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18 | End Sub
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19 |
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20 | Sub String(initStr As *Char, length As Long)
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21 | String()
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22 | Assign(initStr, length)
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23 | End Sub
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24 |
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25 | Sub String(ByRef initStr As String)
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26 | String()
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27 | Assign(initStr)
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28 | End Sub
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29 |
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30 | Sub String(length As Long)
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31 | String()
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32 | ReSize(length)
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33 | End Sub
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34 |
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35 | Sub String(initChar As Char, length As Long)
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36 | ReSize(length, initChar)
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37 | End Sub
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38 |
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39 | Sub ~String()
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40 | _System_free(Chars)
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41 | Chars = 0
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42 | #ifdef _DEBUG
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43 | m_Length = 0
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44 | #endif
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45 | End Sub
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46 |
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47 | Const Function Length() As Long
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48 | Return m_Length
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49 | End Function
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50 |
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51 | Function Operator() As *Char
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52 | Return Chars
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53 | End Function
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54 |
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55 | Sub Operator = (ByRef objString As String)
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56 | Assign(objString.Chars, objString.m_Length)
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57 | End Sub
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58 |
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59 | Sub Operator = (text As *Char)
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60 | Assign(text)
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61 | End Sub
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62 |
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63 | Const Function Operator [] (n As Long) As Char
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64 | Return Chars[n]
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65 | End Function
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66 |
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67 | Sub Operator []= (n As Long, c As Char)
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68 | Chars[n] = c
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69 | End Sub
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70 |
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71 | Const Function Operator + (pszText As *Char) As String
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72 | Return Concat(pszText, lstrlen(pszText))
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73 | End Function
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74 |
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75 | Const Function Operator + (ByRef objString As String) As String
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76 | Return Concat(objString, objString.m_Length)
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77 | End Function
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78 |
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79 | Const Function Operator & (pszText As *Char) As String
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80 | Dim tempString = This + pszText
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81 | Return tempString
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82 | End Function
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83 |
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84 | Const Function Operator & (ByRef objString As String) As String
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85 | Dim tempString = This + objString
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86 | Return tempString
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87 | End Function
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88 |
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89 | Const Function Operator == (ByRef objString As String) As Boolean
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90 | Return _System_StrCmp(This, objString) = 0
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91 | End Function
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92 |
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93 | Const Function Operator == (text As *Char) As Long
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94 | Return _System_StrCmp(This, text) = 0
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95 | End Function
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96 |
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97 | Const Function Operator <> (ByRef objString As String) As Boolean
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98 | Return _System_StrCmp(This, objString)
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99 | End Function
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100 |
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101 | Const Function Operator <> (text As *Char) As Boolean
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102 | Return _System_StrCmp(This, text)
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103 | End Function
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104 |
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105 | Const Function Operator < (ByRef objString As String) As Boolean
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106 | Return _System_StrCmp(This, objString) < 0
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107 | End Function
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108 |
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109 | Const Function Operator < (text As *Char) As Boolean
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110 | Return _System_StrCmp(This, text) < 0
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111 | End Function
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112 |
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113 | Const Function Operator > (ByRef objString As String) As Boolean
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114 | Return _System_StrCmp(This, objString) > 0
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115 | End Function
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116 |
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117 | Const Function Operator > (text As *Char) As Boolean
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118 | Return _System_StrCmp(This, text) > 0
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119 | End Function
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120 |
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121 | Const Function Operator <= (ByRef objString As String) As Boolean
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122 | Return _System_StrCmp(This, objString) <= 0
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123 | End Function
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124 |
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125 | Const Function Operator <= (text As *Char) As Boolean
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126 | Return _System_StrCmp(This, text) <= 0
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127 | End Function
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128 |
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129 | Const Function Operator >= (ByRef objString As String) As Boolean
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130 | Return _System_StrCmp(This, objString) => 0
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131 | End Function
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132 |
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133 | Const Function Operator >= (text As *Char) As Boolean
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134 | Return _System_StrCmp(This, text) => 0
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135 | End Function
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136 |
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137 | Const Function StrPtr() As *Char
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138 | Return Chars
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139 | End Function
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140 |
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141 | Sub ReSize(allocLength As Long)
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142 | If allocLength < 0 Then Exit Sub
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143 | If allocLength > m_Length Then
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144 | Dim oldLength As Long
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145 | oldLength = m_Length
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146 | If AllocStringBuffer(allocLength) <> 0 Then
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147 | ZeroMemory(VarPtr(Chars[oldLength]), SizeOf (Char) * (m_Length - oldLength + 1))
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148 | End If
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149 | Else
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150 | m_Length = allocLength
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151 | Chars[m_Length] = 0
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152 | End If
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153 | End Sub
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154 |
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155 | Sub ReSize(allocLength As Long, c As Char)
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156 | If allocLength < 0 Then
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157 | Exit Sub
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158 | ElseIf allocLength > m_Length Then
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159 | Dim oldLength As Long
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160 | oldLength = m_Length
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161 | If AllocStringBuffer(allocLength) <> 0 Then
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162 | Dim p = VarPtr(Chars[oldLength]) As *Char
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163 | Dim fillLen = m_Length - oldLength
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164 | Dim i As Long
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165 | For i = 0 To ELM(fillLen)
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166 | p[i] = c
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167 | Next
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168 | End If
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169 | Else
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170 | m_Length = allocLength
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171 | End If
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172 | Chars[m_Length] = 0
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173 | End Sub
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174 |
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175 | Sub Assign(text As *Char, textLength As Long)
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176 | If text = Chars Then Exit Sub
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177 | If AllocStringBuffer(textLength) <> 0 Then
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178 | memcpy(Chars, text, SizeOf (Char) * textLength)
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179 | Chars[m_Length] = 0
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180 | End If
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181 | End Sub
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182 |
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183 | Sub Assign(ByRef objString As String)
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184 | Assign(objString.Chars, objString.m_Length)
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185 | End Sub
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186 |
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187 | Sub Assign(text As *Char)
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188 | If text Then
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189 | Assign(text, lstrlen(text))
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190 | Else
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191 | 'Chars=_System_realloc(Chars,1)
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192 | Chars[0] = 0
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193 | m_Length = 0
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194 | End If
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195 | End Sub
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196 |
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197 | Sub Append(text As *Char, textLength As Long)
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198 | Dim prevLen As Long
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199 | prevLen = m_Length
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200 | If AllocStringBuffer(m_Length + textLength) <> 0 Then
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201 | memcpy(VarPtr(Chars[prevLen]), text, SizeOf (Char) * textLength)
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202 | Chars[m_Length] = 0
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203 | End If
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204 | End Sub
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205 |
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206 | Sub Append(text As *Char)
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207 | Append(text, lstrlen(text))
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208 | End Sub
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209 |
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210 | Sub Append(ByRef str As String)
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211 | Append(str.Chars, str.m_Length)
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212 | End Sub
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213 |
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214 | Const Function Clone() As String
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215 | Return This
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216 | End Function
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217 |
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218 | Const Function Concat(lpszText As *Char, textLength As Long) As String
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219 | Dim tempString As String
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220 | With tempString
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221 | .AllocStringBuffer(This.m_Length + textLength)
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222 | memcpy(.Chars, This.Chars, SizeOf (Char) * This.m_Length)
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223 | memcpy(VarPtr(.Chars[This.m_Length]), lpszText, SizeOf (Char) * textLength)
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224 | .Chars[.m_Length] = 0
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225 | End With
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226 | Return tempString
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227 | End Function
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228 |
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229 | Const Function Contains(ByRef objString As String) As Boolean
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230 | Return IndexOf(objString, 0, m_Length) >= 0
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231 | End Function
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232 |
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233 | Const Function Contains(lpszText As *Char) As Boolean
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234 | Return IndexOf(lpszText, 0, m_Length) >= 0
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235 | End Function
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236 |
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237 | Const Function IndexOf(lpszText As *Char) As Long
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238 | Return IndexOf(lpszText, 0, m_Length)
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239 | End Function
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240 |
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241 | Const Function IndexOf(lpszText As *Char, startIndex As Long) As Long
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242 | Return IndexOf(lpszText, startIndex, m_Length - startIndex)
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243 | End Function
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244 |
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245 | Const Function IndexOf(lpszText As *Char, startIndex As Long, count As Long) As Long
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246 | Dim length = lstrlen(lpszText)
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247 |
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248 | If startIndex < 0 Then Return -1
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249 | If count < 1 Or count + startIndex > m_Length Then Return -1
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250 | If length > m_Length Then Return -1
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251 |
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252 | If length = 0 Then Return startIndex
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253 |
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254 | Dim i As Long, j As Long
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255 | For i = startIndex To startIndex + count - 1
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256 | For j = 0 To length - 1
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257 | If Chars[i + j] = lpszText[j] Then
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258 | If j = length - 1 Then Return i
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259 | Else
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260 | Exit For
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261 | End If
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262 | Next
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263 | Next
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264 | Return -1
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265 | End Function
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266 |
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267 | Const Function LastIndexOf(lpszText As *Char) As Long
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268 | Return LastIndexOf(lpszText, m_Length - 1, m_Length)
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269 | End Function
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270 |
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271 | Const Function LastIndexOf(lpszText As *Char, startIndex As Long) As Long
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272 | Return LastIndexOf(lpszText As *Char, startIndex, startIndex + 1)
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273 | End Function
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274 |
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275 | Const Function LastIndexOf(lpszText As *Char, startIndex As Long, count As Long) As Long
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276 | Dim length = lstrlen(lpszText)
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277 |
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278 | If startIndex < 0 Or startIndex > m_Length - 1 Then Return -1
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279 | If count < 1 Or count > startIndex + 2 Then Return -1
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280 | If length > m_Length Then Return -1
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281 |
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282 | If length = 0 Then Return startIndex
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283 |
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284 | Dim i As Long, j As Long
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285 | For i = startIndex To startIndex - count + 1 Step -1
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286 | For j = length - 1 To 0 Step -1
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287 | If Chars[i + j] = lpszText[j] Then
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288 | If j = 0 Then Return i
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289 | Else
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290 | Exit For
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291 | End If
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292 | Next
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293 | Next
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294 | Return -1
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295 | End Function
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296 |
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297 | Const Function StartsWith(lpszText As *Char) As Boolean
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298 | Return IndexOf(lpszText) = 0
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299 | End Function
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300 |
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301 | Const Function EndsWith(lpszText As *Char) As Boolean
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302 | Return LastIndexOf(lpszText) = m_Length - lstrlen(lpszText)
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303 | End Function
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304 |
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305 | Const Function Insert(startIndex As Long, text As String) As String
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306 | Return Insert(startIndex, text.Chars, text.Length)
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307 | End Function
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308 |
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309 | Const Function Insert(startIndex As Long, text As *Char) As String
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310 | Return Insert(startIndex, text, lstrlen(text))
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311 | End Function
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312 |
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313 | Const Function Insert(startIndex As Long, text As *Char, length As Long) As String
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314 | If startIndex < 0 Or startIndex > m_Length Or length < 0 Then
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315 | Debug 'ArgumentOutOfRangeException
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316 |
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317 | End If
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318 | Insert.ReSize(m_Length + length)
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319 | memcpy(Insert.Chars, Chars, SizeOf (Char) * startIndex)
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320 | memcpy(VarPtr(Insert.Chars[startIndex]), text, SizeOf (Char) * length)
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321 | memcpy(VarPtr(Insert.Chars[startIndex + length]), VarPtr(Chars[startIndex]), SizeOf (Char) * (m_Length - startIndex + 1))
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322 | End Function
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323 |
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324 | Const Function SubString(startIndex As Long) As String
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325 | Return SubString(startIndex, m_Length - startIndex)
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326 | End Function
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327 |
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328 | Const Function SubString(startIndex As Long, length As Long) As String
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329 | If startIndex < 0 Or length <= 0 Then Return ""
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330 | If startIndex + length > m_Length Then Return ""
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331 |
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332 | Dim temp As String
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333 | temp.AllocStringBuffer(length)
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334 | memcpy(temp.Chars, VarPtr(Chars[startIndex]), SizeOf (Char) * length)
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335 | Chars[m_Length] = 0
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336 | Return temp
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337 | End Function
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338 |
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339 | Const Function Remove(startIndex As Long) As String
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340 | Remove.ReSize(startIndex)
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341 | memcpy(Remove.Chars, This.Chars, SizeOf (Char) * startIndex)
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342 | End Function
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343 |
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344 | Const Function Remove(startIndex As Long, count As Long) As String
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345 | Remove.ReSize(m_Length - count)
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346 | memcpy(Remove.Chars, This.Chars, SizeOf (Char) * startIndex)
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347 | memcpy(VarPtr(Remove.Chars[startIndex]), VarPtr(This.Chars[startIndex + count]), SizeOf (Char) * startIndex)
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348 | End Function
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349 | /*
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350 | Static Function IsNullOrEmpty(s As String) As Boolean
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351 | If s <> Nothing Then
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352 | If s.m_Length > 0 Then
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353 | Return True
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354 | End If
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355 | End If
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356 | Return False
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357 | End Function
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358 | */
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359 | Const Function Replace(oldChar As Char, newChar As Char) As String
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360 | Replace = Copy(This)
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361 | With Replace
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362 | Dim i As Long
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363 | For i = 0 To ELM(.m_Length)
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364 | If .Chars[i] = .oldChar Then
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365 | .Chars[i] = .newChar
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366 | End If
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367 | Next
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368 | End With
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369 | End Function
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370 |
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371 | Const Function Replace(ByRef oldStr As String, ByRef newStr As String) As String
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372 | ' If oldStr = Nothing Then Throw ArgumentNullException
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373 | '
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374 | ' If newStr = Nothing Then
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375 | ' Return ReplaceCore(oldStr, oldStr.m_Length, "", 0)
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376 | ' Else
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377 | Return ReplaceCore(oldStr, oldStr.m_Length, newStr, newStr.m_Length)
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378 | ' End If
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379 | End Function
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380 |
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381 | Const Function Replace(oldStr As *Char, newStr As *Char)
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382 | If oldStr = 0 Then Debug 'Throw ArgumentNullException
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383 | If newStr = 0 Then newStr = ""
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384 | Return ReplaceCore(oldStr, lstrlen(oldStr), newStr, lstrlen(newStr)) As String
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385 | End Function
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386 |
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387 | Const Function Replace(oldStr As *Char, oldLen As Long, newStr As *Char, newLen As Long) As String
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388 | If oldStr = 0 Then Debug 'Throw ArgumentNullException
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389 | If newStr = 0 Then
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390 | newStr = ""
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391 | newLen = 0
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392 | End If
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393 | Return ReplaceCore(oldStr, oldLen, newStr, newLen)
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394 | End Function
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395 |
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396 | Const Function ToLower() As String
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397 | ToLower.ReSize(m_Length)
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398 | Dim i As Long
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399 | For i = 0 To ELM(m_Length)
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400 | ToLower.Chars[i] = _System_ASCII_ToLower(Chars[i])
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401 | Next
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402 | End Function
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403 |
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404 | Const Function ToUpper() As String
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405 | ToUpper.ReSize(m_Length)
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406 | Dim i As Long
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407 | For i = 0 To ELM(m_Length)
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408 | ToUpper.Chars[i] = _System_ASCII_ToUpper(Chars[i])
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409 | Next
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410 | End Function
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411 |
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412 | Sub Swap(ByRef x As String)
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413 | Dim tempLen As Long
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414 | Dim tempChars As *Char
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415 | tempLen = x.m_Length
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416 | tempChars = x.Chars
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417 | x.m_Length = This.m_Length
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418 | x.Chars = This.Chars
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419 | This.m_Length = tempLen
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420 | This.Chars = tempChars
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421 | End Sub
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422 |
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423 | Override Function ToString() As String
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424 | Return This
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425 | End Function
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426 |
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427 | Static Function Copy(s As String) As String
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428 | Copy.Resize(s.m_Length)
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429 | memcpy(Copy.Chars, This.Chars, SizeOf (Char) * m_Length)
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430 | End Function
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431 |
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432 | Private
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433 | ' メモリ確保に失敗すると元の文字列は失われない。(例外安全でいう強い保障)
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434 | Function AllocStringBuffer(textLength As Long) As *Char
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435 | If textLength < 0 Then
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436 | Return 0
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437 | ElseIf textLength > m_Length Then
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438 | AllocStringBuffer = _System_realloc(Chars, SizeOf(Char) * (textLength + 1))
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439 | If AllocStringBuffer <> 0 Then
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440 | m_Length = textLength
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441 | Chars = AllocStringBuffer
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442 | End If
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443 | Else
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444 | m_Length = textLength
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445 | AllocStringBuffer = Chars
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446 | End If
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447 | End Function
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448 |
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449 | Function ReplaceCore(oldStr As *Char, oldLen As Long, newStr As *Char, newLen As Long) As String
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450 | If oldLen = 0 Then
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451 | Debug 'Throw ArgumentException
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452 | End If
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453 | Dim tmp As String
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454 | With tmp
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455 | Dim current = 0 As Long
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456 | Do
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457 | Dim pos = IndexOf(oldStr, current)
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458 | If pos = -1 Then
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459 | Exit Do
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460 | End If
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461 | .Append(VarPtr(Chars[current]), pos - current)
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462 | .Append(newStr, newLen)
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463 | current = pos + oldLen
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464 | Loop
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465 | .Append(VarPtr(Chars[current]), m_Length - current)
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466 | End With
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467 | Return tmp
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468 | End Function
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469 |
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470 | End Class
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471 |
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