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annotate basic/LiteralParsing.d @ 106:89db676fbacb

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Now able of understanding strings.
author Anders Johnsen <skabet@gmail.com>
date Thu, 22 May 2008 12:09:11 +0200
parents
children c658172ca8a0
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106
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
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1 module basic.LiteralParsing.d;
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2
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3 import basic.SourceLocation,
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4 basic.Message;
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5
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6 import tango.io.Stdout,
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7 tango.core.BitManip,
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8 Integer = tango.text.convert.Integer,
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9 tango.text.Util;
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10
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11 enum StructType
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12 {
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13 Char,
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14 WChar,
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15 DChar
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16 }
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17
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18 struct String
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19 {
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20 StructType type;
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21 ubyte[] data;
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22 }
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23
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24 private struct EscapeReturn
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25 {
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26 ubyte[] data;
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27 int length;
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28 }
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29
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30 String parseString(char[] str, SourceLocation loc, MessageHandler messages)
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31 {
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32 String strBuf;
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33 strBuf.data.length = str.length;
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34 strBuf.data.length = 0;
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35
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36 switch(str[0])
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37 {
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38 case 'r':
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39 strBuf = parseWysiwygString(str[1..$], strBuf);
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40 break;
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41 case '`':
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42 strBuf = parseWysiwygString(str, strBuf);
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43 break;
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44 case '"':
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45 strBuf = parseDoubleQuotedString(str, strBuf, loc, messages);
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46 break;
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47 case 'x':
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48 strBuf = parseHexString(str[1..$], strBuf, loc + 1, messages);
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49 break;
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50 default:
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51 messages.report(InvalidStrPrefix, loc, loc + 1);
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52
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53 }
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54
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55 printString(str, strBuf);
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56
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57 return strBuf;
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58 }
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59
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60 String parseHexString(char[] str, String strBuf,
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61 SourceLocation loc, MessageHandler messages)
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62 {
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63 int i = 1; // first char is "
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64 char[] hex = "0123456789abcdefABCDEF";
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65 char[] whitespace = "\r\n ";
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66 char[] hexBuf;
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67
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68 while(str[i] != '"')
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69 {
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70 if(hex.contains(str[i]))
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71 {
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72 hexBuf ~= str[i];
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73 if(hexBuf.length == 2)
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74 {
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75 strBuf.data ~= Integer.toInt(hexBuf, 16);
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76 hexBuf.length = 0;
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77 }
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78 }
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79 else if(whitespace.contains(str[i]))
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80 {}
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81 else
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82 messages.report(InvalidHexStrChar, loc + i, loc + i + 1);
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83
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84 i++;
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85 }
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86
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87
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88
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89 return strBuf;
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90 }
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91
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92
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93 String parseDoubleQuotedString(char[] str, String strBuf,
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94 SourceLocation loc, MessageHandler messages)
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95 {
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96 int i = 1; // first char is "
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97
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98 while(str[i] != '"')
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99 {
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100 switch(str[i])
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101 {
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102 case '\\': // EscapeSequence
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103 EscapeReturn res = parseEscapeSequence(str[i..$], loc + i, messages);
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104 strBuf.data ~= res.data;
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105 i += res.length;
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106 break;
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107 default:
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108 strBuf.data ~= str[i];
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109 i++;
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110 }
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111 if(i >= str.length)
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112 break;
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113 }
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114
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115 return strBuf;
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116 }
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117
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118 EscapeReturn parseEscapeSequence(char[] str,
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119 SourceLocation loc, MessageHandler messages)
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120 {
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121 EscapeReturn res;
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122
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123 switch(str[1])
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124 {
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125 case '\'':
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126 res.length = 2;
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127 res.data ~= '\'';
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128 break;
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129 case '"':
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130 res.length = 2;
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131 res.data ~= '\"';
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132 break;
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133 case '?':
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134 res.length = 2;
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135 res.data ~= '\?';
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136 break;
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137 case '\\':
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138 res.length = 2;
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139 res.data ~= '\\';
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140 break;
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141 case 'a':
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142 res.length = 2;
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143 res.data ~= '\a';
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144 break;
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145 case 'b':
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146 res.length = 2;
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147 res.data ~= '\b';
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148 break;
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149 case 'f':
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150 res.length = 2;
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151 res.data ~= '\f';
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152 break;
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153 case 'n':
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154 res.length = 2;
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155 res.data ~= '\n';
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156 break;
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157 case 'r':
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158 res.length = 2;
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159 res.data ~= '\r';
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160 break;
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161 case 't':
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162 res.length = 2;
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163 res.data ~= '\t';
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164 break;
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165 case 'v':
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166 res.length = 2;
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167 res.data ~= '\v';
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168 break;
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169 case 'x':
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170 char[] hex = "0123456789abcdefABCDEF";
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171 char[] hexBuf;
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172 if(str.length - 1 >= 4)
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173 {
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174 for(int i = 2; i < 4; i++)
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diff changeset
175 if(hex.contains(str[i]))
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
176 hexBuf ~= str[i];
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
177 else
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
178 messages.report(StringHexInvalid, loc + i, loc + i + 1)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
179 .arg(Integer.toString(i-1))
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
180 .arg(Integer.toString(2));
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
181 res.length = 4;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
182 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
183 else
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
184 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
185 messages.report(StringShortEscape, loc, loc + str.length);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
186 res.length = str.length - 1;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
187 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
188 res.data ~= cast(ubyte)Integer.toInt(hexBuf, 16);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
189 break;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
190 case 'u':
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
191 char[] hex = "0123456789abcdefABCDEF";
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
192 char[] hexBuf;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
193 if(str.length - 1 >= 6)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
194 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
195 for(int i = 2; i < 6; i++)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
196 if(hex.contains(str[i]))
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
197 hexBuf ~= str[i];
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
198 else
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
199 messages.report(StringHexInvalid, loc + i, loc + i + 1)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
200 .arg(Integer.toString(i-1))
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
201 .arg(Integer.toString(6));
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
202 res.length = 6;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
203 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
204 else
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
205 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
206 messages.report(StringShortEscape, loc, loc + str.length);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
207 res.length = str.length - 1;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
208 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
209 uint i = Integer.toLong(hexBuf, 16);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
210 if(!isValidUtf8(i))
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
211 messages.report(InvalidUtf8Hex, loc, loc+6);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
212 else
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
213 res.data ~= parseToUtf8(i);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
214 break;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
215 case 'U':
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
216 char[] hex = "0123456789abcdefABCDEF";
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
217 char[] hexBuf;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
218 if(str.length - 1 >= 10)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
219 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
220 for(int i = 2; i < 10; i++)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
221 if(hex.contains(str[i]))
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
222 hexBuf ~= str[i];
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
223 else
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
224 messages.report(StringHexInvalid, loc + i, loc + i + 1)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
225 .arg(Integer.toString(i-1))
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
226 .arg(Integer.toString(10));
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
227 res.length = 10;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
228 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
229 else
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
230 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
231 messages.report(StringShortEscape, loc, loc + str.length);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
232 res.length = str.length - 1;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
233 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
234 uint i = Integer.toLong(hexBuf, 16);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
235 if(!isValidUtf8(i))
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
236 messages.report(InvalidUtf8Hex, loc, loc+10);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
237 else
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
238 res.data ~= parseToUtf8(i);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
239 break;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
240 case '0':
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
241 case '1':
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
242 case '2':
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
243 case '3':
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
244 case '4':
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
245 case '5':
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
246 case '6':
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
247 case '7':
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
248 char[] oct = "01234567";
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
249 char[] octBuf;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
250 octBuf ~= str[1];
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
251 res.length = 2;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
252 for(int i = 2; i < 4; i++)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
253 if(oct.contains(str[i]))
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
254 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
255 octBuf ~= str[i];
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
256 res.length += 1;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
257 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
258 else
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
259 break;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
260
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
261 uint i = Integer.toLong(octBuf, 8);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
262 res.data ~= i;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
263 break;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
264 default:
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
265 messages.report(InvalidStrEscape, loc, loc + 2);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
266 res.length += 2;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
267 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
268
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
269 return res;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
270 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
271
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
272 String parseWysiwygString(char[] str, String strBuf)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
273 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
274 char start = str[0];
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
275
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
276 int i = 1;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
277
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
278 while(str[i] != start)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
279 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
280 strBuf.data ~= cast(ubyte)str[i];
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
281 i++;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
282 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
283 return strBuf;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
284 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
285
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
286 ubyte[] parseToUtf8(uint i)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
287 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
288 if(i <= 0x00007F)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
289 return [cast(ubyte)i];
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
290 else if(i <= 0x0007FF)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
291 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
292 ubyte a = (i << 26) >> 26;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
293 bts(cast(uint*)&a, 7);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
294 ubyte b = (i << 19) >> 25;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
295 bts(cast(uint*)&b, 7);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
296 bts(cast(uint*)&b, 6);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
297 return [b,a];
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
298 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
299 else if(i <= 0x00FFFF)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
300 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
301 ubyte a = (i << 26) >> 26;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
302 bts(cast(uint*)&a, 7);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
303 ubyte b = (i << 20) >> 26;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
304 bts(cast(uint*)&b, 7);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
305 ubyte c = (i << 16) >> 28;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
306 bts(cast(uint*)&c, 7);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
307 bts(cast(uint*)&c, 6);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
308 bts(cast(uint*)&c, 5);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
309 return [c,b,a];
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
310 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
311 else if(i <= 0x10FFFF)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
312 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
313 ubyte a = (i << 26) >> 26;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
314 bts(cast(uint*)&a, 7);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
315 ubyte b = (i << 20) >> 26;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
316 bts(cast(uint*)&b, 7);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
317 ubyte c = (i << 14) >> 26;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
318 bts(cast(uint*)&c, 7);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
319 ubyte d = (i << 11) >> 29;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
320 bts(cast(uint*)&d, 7);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
321 bts(cast(uint*)&d, 6);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
322 bts(cast(uint*)&d, 5);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
323 bts(cast(uint*)&d, 4);
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
324 return [d,c,b,a];
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
325 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
326 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
327
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
328 bool isValidUtf8(uint i)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
329 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
330 if(i <= 0x10FFFF)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
331 return true;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
332 return false;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
333 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
334
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
335 void printString(char[] str, String strBuf)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
336 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
337 char[] s;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
338 switch(strBuf.type)
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
339 {
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
340 case StructType.Char:
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
341 Stdout(str)(" have become").newline()
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
342 (cast(char[])strBuf.data).newline;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
343 break;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
344 case StructType.WChar:
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
345 Stdout(str)(" have become").newline()
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
346 (cast(wchar[])strBuf.data).newline;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
347 break;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
348 case StructType.DChar:
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
349 Stdout(str)(" have become").newline()
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
350 (cast(dchar[])strBuf.data).newline;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
351 break;
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
352 }
89db676fbacb Now able of understanding strings.
Anders Johnsen <skabet@gmail.com>
parents:
diff changeset
353 }