1 | Class String
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2 | m_Length As Long
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3 | Public
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4 | Chars As LPSTR
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5 |
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6 | Sub String()
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7 | Chars = _System_calloc(1)
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8 | m_Length = 0
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9 | End Sub
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10 |
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11 | Sub String(initStr As LPSTR)
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12 | String()
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13 | Assign(initStr)
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14 | End Sub
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15 |
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16 | /* Sub String(ByRef initStr As String)
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17 | String()
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18 | Assign(initStr)
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19 | End Sub
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20 | */
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21 | /*
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22 | Sub String(length As Long)
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23 | ReSize(length)
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24 | End Sub
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25 | */
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26 | Sub String(initChar As Byte, length As Long)
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27 | ReSize(length, initChar)
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28 | End Sub
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29 |
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30 | Sub ~String()
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31 | _System_free(Chars)
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32 | Chars = 0
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33 | #ifdef _DEBUG
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34 | m_Length = 0
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35 | #endif
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36 | End Sub
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37 |
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38 | Function Length() As Long
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39 | Return m_Length
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40 | End Function
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41 |
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42 | Function Operator() As LPSTR
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43 | Return Chars
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44 | End Function
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45 |
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46 | Sub Operator = (ByRef objString As String)
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47 | Assign(objString.Chars, objString.m_Length)
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48 | End Sub
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49 |
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50 | Sub Operator = (text As LPSTR)
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51 | Assign(text)
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52 | End Sub
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53 |
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54 | Function Operator[] (n As Long) As Byte
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55 | Return Chars[n]
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56 | End Function
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57 |
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58 | Sub Operator[]= (n As Long, c As Byte)
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59 | Chars[n] = c
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60 | End Sub
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61 |
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62 | Function Operator+ (lpszText As LPSTR) As String
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63 | Return Concat(lpszText, lstrlen(lpszText))
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64 | End Function
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65 |
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66 | Function Operator+ (ByRef objString As String) As String
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67 | Return Concat(objString, objString.m_Length)
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68 | End Function
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69 |
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70 | Function Operator& (lpszText As LPSTR) As String
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71 | Dim tempString As String
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72 | tempString=This+lpszText
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73 | Return tempString
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74 | End Function
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75 |
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76 | Function Operator& (ByRef objString As String) As String
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77 | Dim tempString As String
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78 | tempString=This+objString
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79 | Return tempString
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80 | End Function
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81 |
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82 | Function Operator== (ByRef objString As String) As Long
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83 | If lstrcmp(This, objString) = 0 Then
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84 | Return _System_TRUE
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85 | Else
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86 | Return _System_FALSE
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87 | End If
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88 | End Function
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89 |
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90 | Function Operator== (lpszText As LPSTR) As Long
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91 | If lstrcmp(This, lpszText) = 0 Then
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92 | Return _System_TRUE
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93 | Else
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94 | Return _System_FALSE
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95 | End If
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96 | End Function
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97 |
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98 | Function Operator<> (ByRef objString As String) As Long
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99 | Return lstrcmp(This, objString)
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100 | End Function
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101 |
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102 | Function Operator<> (lpszText As LPSTR) As Long
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103 | Return lstrcmp(This, lpszText)
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104 | End Function
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105 |
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106 | Function Operator< (ByRef objString As String) As Long
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107 | If lstrcmp(This, objString) < 0 Then
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108 | Return _System_TRUE
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109 | Else
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110 | Return _System_FALSE
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111 | End If
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112 | End Function
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113 |
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114 | Function Operator< (lpszText As LPSTR) As Long
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115 | If lstrcmp(This, lpszText) < 0 Then
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116 | Return _System_TRUE
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117 | Else
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118 | Return _System_FALSE
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119 | End If
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120 | End Function
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121 |
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122 | Function Operator> (ByRef objString As String) As Long
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123 | If lstrcmp(This, objString) > 0 Then
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124 | Return _System_TRUE
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125 | Else
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126 | Return _System_FALSE
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127 | End If
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128 | End Function
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129 |
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130 | Function Operator> (lpszText As LPSTR) As Long
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131 | If lstrcmp(This, lpszText) > 0 Then
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132 | Return _System_TRUE
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133 | Else
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134 | Return _System_FALSE
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135 | End If
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136 | End Function
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137 |
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138 | Function Operator<= (ByRef objString As String) As Long
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139 | If lstrcmp(This, objString) <= 0 Then
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140 | Return _System_TRUE
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141 | Else
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142 | Return _System_FALSE
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143 | End If
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144 | End Function
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145 |
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146 | Function Operator<= (lpszText As LPSTR) As Long
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147 | If lstrcmp(This, lpszText) <= 0 Then
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148 | Return _System_TRUE
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149 | Else
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150 | Return _System_FALSE
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151 | End If
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152 | End Function
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153 |
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154 | Function Operator>= (ByRef objString As String) As Long
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155 | If lstrcmp(This, objString) => 0 Then
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156 | Return _System_TRUE
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157 | Else
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158 | Return _System_FALSE
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159 | End If
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160 | End Function
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161 |
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162 | Function Operator>= (lpszText As LPSTR) As Long
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163 | If lstrcmp(This, lpszText) => 0 Then
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164 | Return _System_TRUE
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165 | Else
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166 | Return _System_FALSE
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167 | End If
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168 | End Function
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169 |
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170 | Function StrPtr() As LPSTR
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171 | Return Chars
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172 | End Function
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173 |
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174 | Sub ReSize(allocLength As Long)
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175 | If allocLength < 0 Then Exit Sub
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176 | If allocLength > m_Length Then
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177 | Dim oldLength As Long
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178 | oldLength = m_Length
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179 | If AllocStringBuffer(allocLength) <> 0 Then
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180 | ZeroMemory(Chars + oldLength, m_Length - oldLength + 1)
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181 | End If
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182 | Else
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183 | m_Length = allocLength
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184 | Chars[m_Length] = 0
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185 | End If
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186 | End Sub
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187 |
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188 | Sub ReSize(allocLength As Long, c As Byte)
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189 | If allocLength < 0 Then
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190 | Exit Sub
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191 | ElseIf allocLength > m_Length Then
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192 | Dim oldLength As Long
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193 | oldLength = m_Length
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194 | If AllocStringBuffer(allocLength) <> 0 Then
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195 | FillMemory(Chars + oldLength, m_Length - oldLength, c)
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196 | End If
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197 | Else
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198 | m_Length = allocLength
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199 | End If
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200 | Chars[m_Length] = 0
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201 | End Sub
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202 |
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203 | Sub Assign(lpszText As LPSTR, textLength As Long)
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204 | If lpszText = Chars Then Exit Sub
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205 | If AllocStringBuffer(textLength) <> 0 Then
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206 | memcpy(Chars, lpszText, textLength)
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207 | Chars[m_Length] = 0
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208 | End If
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209 | End Sub
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210 |
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211 | Sub Assign(ByRef objString As String)
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212 | Assign(objString.Chars, objString.m_Length)
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213 | End Sub
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214 |
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215 | Sub Assign(lpszText As LPSTR)
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216 | If lpszText Then
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217 | Assign(lpszText, lstrlen(lpszText))
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218 | Else
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219 | 'Chars=_System_realloc(Chars,1)
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220 | Chars[0] = 0
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221 | m_Length = 0
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222 | End If
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223 | End Sub
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224 |
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225 | Sub Append(lpszText As LPSTR, textLength As Long)
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226 | Dim prevLen As Long
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227 | prevLen = m_Length
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228 | If AllocStringBuffer(m_Length + textLength) <> 0 Then
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229 | memcpy(Chars + prevLen, lpszText, textLength)
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230 | Chars[m_Length] = 0
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231 | End If
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232 | End Sub
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233 |
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234 | Sub Append(text As LPSTR)
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235 | Append(text, lstrlen(text))
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236 | End Sub
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237 |
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238 | Sub Append(ByRef str As String)
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239 | Append(str.Chars, str.m_Length)
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240 | End Sub
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241 |
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242 | Function Concat(lpszText As LPSTR, textLength As Long) As String
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243 | Dim tempString As String
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244 | With tempString
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245 | .AllocStringBuffer(This.m_Length + textLength)
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246 | memcpy(.Chars, This.Chars, This.m_Length)
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247 | memcpy(.Chars + This.m_Length, lpszText, textLength)
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248 | .Chars[.m_Length] = 0
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249 | End With
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250 | Return tempString
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251 | End Function
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252 |
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253 | Function Contains(ByRef objString As String) As BOOL
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254 | If IndexOf(objString, 0, m_Length) >= 0 Then
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255 | Return _System_TRUE
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256 | Else
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257 | Return _System_FALSE
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258 | End If
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259 | End Function
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260 |
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261 | Function Contains(lpszText As LPSTR) As BOOL
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262 | If IndexOf(lpszText, 0, m_Length) >= 0 Then
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263 | Return _System_TRUE
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264 | Else
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265 | Return _System_FALSE
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266 | End If
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267 | End Function
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268 |
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269 | Function IndexOf(lpszText As LPSTR) As Long
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270 | Return IndexOf(lpszText, 0, m_Length)
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271 | End Function
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272 |
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273 | Function IndexOf(lpszText As LPSTR, startIndex As Long) As Long
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274 | Return IndexOf(lpszText, startIndex, m_Length - startIndex)
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275 | End Function
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276 |
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277 | Function IndexOf(lpszText As LPSTR, startIndex As Long, count As Long) As Long
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278 | Dim length As Long
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279 | length = lstrlen(lpszText)
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280 |
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281 | If startIndex < 0 Then Return -1
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282 | If count < 1 Or count + startIndex > m_Length Then Return -1
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283 | If length > m_Length Then Return -1
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284 |
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285 | If length = 0 Then Return startIndex
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286 |
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287 | Dim i As Long, j As Long
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288 | For i = startIndex To startIndex + count - 1
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289 | For j = 0 To length - 1
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290 | If Chars[i + j] = lpszText[j] Then
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291 | If j = length - 1 Then Return i
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292 | Else
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293 | Exit For
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294 | End If
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295 | Next
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296 | Next
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297 | Return -1
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298 | End Function
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299 |
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300 | Function LastIndexOf(lpszText As LPSTR) As Long
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301 | Return LastIndexOf(lpszText, m_Length - 1, m_Length)
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302 | End Function
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303 |
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304 | Function LastIndexOf(lpszText As LPSTR, startIndex As Long) As Long
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305 | Return LastIndexOf(lpszText As LPSTR, startIndex, startIndex + 1)
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306 | End Function
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307 |
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308 | Function LastIndexOf(lpszText As LPSTR, startIndex As Long, count As Long) As Long
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309 | Dim length As Long
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310 | length = lstrlen(lpszText)
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311 |
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312 | If startIndex < 0 Or startIndex > m_Length - 1 Then Return -1
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313 | If count < 1 Or count > startIndex + 2 Then Return -1
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314 | If length > m_Length Then Return -1
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315 |
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316 | If length = 0 Then Return startIndex
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317 |
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318 | Dim i As Long, j As Long
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319 | For i = startIndex To startIndex - count + 1 Step -1
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320 | For j = length - 1 To 0 Step -1
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321 | If Chars[i + j] = lpszText[j] Then
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322 | If j = 0 Then Return i
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323 | Else
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324 | Exit For
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325 | End If
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326 | Next
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327 | Next
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328 | Return -1
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329 | End Function
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330 |
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331 | Function StartsWith(lpszText As LPSTR) As BOOL
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332 | If IndexOf(lpszText) = 0 Then
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333 | Return _System_TRUE
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334 | Else
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335 | Return _System_FALSE
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336 | End If
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337 | End Function
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338 |
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339 | Function EndsWith(lpszText As LPSTR) As BOOL
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340 | If LastIndexOf(lpszText) = m_Length - lstrlen(lpszText) Then
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341 | Return _System_TRUE
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342 | Else
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343 | Return _System_FALSE
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344 | End If
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345 | End Function
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346 |
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347 | Function Insert(startIndex As Long, lpszText As LPSTR) As Long
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348 | Dim length As Long
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349 | length = lstrlen(lpszText)
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350 |
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351 | If startIndex < 0 Or startIndex > m_Length Then Return -1
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352 |
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353 | Dim newChars As LPSTR
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354 | newChars = _System_malloc(length + m_Length + 1)
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355 | If newChars = 0 Then Return -1
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356 |
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357 | memcpy(newChars, Chars, startIndex)
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358 | memcpy(newChars + startIndex, lpszText, length)
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359 | memcpy(newChars + startIndex + length, Chars + startIndex, m_Length - startIndex + 1)
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360 |
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361 | _System_free(Chars)
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362 | Chars = newChars
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363 | m_Length = length + m_Length
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364 | Return m_Length
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365 | End Function
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366 |
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367 | Function SubString(startIndex As Long) As String
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368 | Return SubString(startIndex, m_Length - startIndex)
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369 | End Function
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370 |
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371 | Function SubString(startIndex As Long, length As Long) As String
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372 | If startIndex < 0 Or length <= 0 Then Return ""
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373 | If startIndex + length > m_Length Then Return ""
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374 |
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375 | Dim temp As String
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376 | temp.AllocStringBuffer(length)
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377 | memcpy(temp.Chars, VarPtr(Chars[startIndex]), length)
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378 | Chars[m_Length] = 0
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379 | Return temp
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380 | End Function
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381 |
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382 | Function Remove(startIndex As Long) As Long
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383 | If startIndex < 0 Or startIndex > m_Length Then Return -1
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384 | Chars[startIndex] = 0
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385 | m_Length = startIndex
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386 | Return m_Length
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387 | End Function
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388 |
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389 | Function Remove(startIndex As Long, count As Long) As Long
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390 | If startIndex < 0 Or count < 0 Then Return -1
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391 | If startIndex + count > m_Length Then Return -1
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392 |
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393 | Dim newChars As LPSTR
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394 | newChars = _System_malloc(m_Length - count + 1)
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395 | If newChars = 0 Then Return -1
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396 |
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397 | memcpy(newChars, Chars, startIndex)
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398 | memcpy(newChars + startIndex, Chars + startIndex + count, m_Length - startIndex - count)
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399 | newChars[m_Length - count] = 0
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400 |
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401 | _System_free(Chars)
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402 | Chars = newChars
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403 | m_Length = m_Length - count
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404 | Return m_Length
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405 | End Function
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406 |
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407 | Function IsNullOrEmpty() As BOOL
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408 | If m_Length = 0 Then
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409 | Return _System_TRUE
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410 | Else
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411 | Return _System_FALSE
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412 | End If
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413 | End Function
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414 |
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415 | Sub Replace(oldChar As Byte, newChar As Byte)
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416 | Dim i As Long
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417 | For i = 0 To ELM(m_Length)
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418 | If Chars[i] = oldChar Then
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419 | Chars[i] = newChar
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420 | End If
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421 | Next
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422 | End Sub
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423 |
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424 | Sub Replace(ByRef oldStr As String, ByRef newStr As String)
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425 | Replace(oldStr, oldStr.m_Length, newStr, newStr.m_Length)
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426 | End Sub
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427 |
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428 | Sub Replace(oldStr As PCSTR, newStr As PCSTR)
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429 | Replace(oldStr, lstrlen(oldStr), newStr, lstrlen(newStr))
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430 | End Sub
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431 |
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432 | Sub Replace(oldStr As PCSTR, oldLen As Long, newStr As PCSTR, newLen As Long)
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433 | Dim tempString As String
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434 | With tempString
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435 | Dim current = 0 As Long
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436 | Do
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437 | Dim pos As Long
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438 | pos = IndexOf(oldStr, current)
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439 | If pos = -1 Then
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440 | Exit Do
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441 | End If
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442 | .Append(Chars + current, pos - current)
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443 | .Append(newStr, newLen)
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444 | current = pos + oldLen
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445 | Loop
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446 | .Append(Chars + current, m_Length - current)
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447 | End With
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448 | Swap(tempString)
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449 | End Sub
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450 |
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451 | Sub ToLower()
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452 | CharLower(Chars)
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453 | End Sub
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454 |
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455 | Sub ToUpper()
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456 | CharUpper(Chars)
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457 | End Sub
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458 |
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459 | Sub Swap(ByRef x As String)
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460 | Dim tempLen As Long
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461 | Dim tempChars As PSTR
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462 | tempLen = x.m_Length
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463 | tempChars = x.Chars
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464 | x.m_Length = This.m_Length
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465 | x.Chars = This.Chars
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466 | This.m_Length = tempLen
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467 | This.Chars = tempChars
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468 | End Sub
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469 |
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470 | Private
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471 | ' 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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472 | Function AllocStringBuffer(textLength As Long) As LPSTR
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473 | If textLength < 0 Then
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474 | Return 0
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475 | ElseIf textLength > m_Length Then
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476 | AllocStringBuffer = _System_realloc(Chars, textLength + 1)
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477 | If AllocStringBuffer <> 0 Then
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478 | m_Length = textLength
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479 | Chars = AllocStringBuffer
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480 | End If
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481 | Else
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482 | m_Length = textLength
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483 | AllocStringBuffer = Chars
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484 | End If
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485 | End Function
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486 |
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487 | End Class
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488 |
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