Mercurial > hg > Applications > Grep
annotate regexParser/regexParser.cc @ 187:ef798db705e9 pairPro
remove some warnings and errors(not working)
author | Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp> |
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date | Thu, 24 Dec 2015 22:38:50 +0900 |
parents | d25f4f3b4c34 |
children | 109d22faf7b5 |
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1 #include <stdlib.h> |
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2 #include <stdio.h> |
122 | 3 #include <string.h> |
4 #include <ctype.h> | |
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5 #include "regexParser.h" |
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6 |
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7 static NodePtr charClass(RegexInfoPtr); |
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8 static void token(RegexInfoPtr); |
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9 static NodePtr regexAtom(RegexInfoPtr); |
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10 NodePtr regex(RegexInfoPtr); |
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11 |
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12 /** |
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13 * Create a node of regex parse tree. |
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14 * tokenType |
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15 * regexPosition(state) |
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16 * stateTransitionTable |
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17 */ |
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18 |
118 | 19 static |
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20 NodePtr allocateNode() { |
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21 NodePtr n = NEW(Node); |
125 | 22 n->cc = NULL; |
23 n->left = NULL; | |
24 n->right = NULL; | |
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25 return n; |
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26 } |
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27 |
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28 NodePtr createNode(RegexInfoPtr ri,unsigned char type,CharClassPtr cc, NodePtr left, NodePtr right) { |
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29 NodePtr n = allocateNode(); |
125 | 30 n->tokenType = type; |
134 | 31 n->cc = cc; |
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32 n->state = NULL; |
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33 n->left = left; |
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34 n->right = right; |
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35 return n; |
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36 } |
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37 |
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38 CharClassPtr createCharClassWord(RegexInfoPtr ri) { |
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39 CharClassPtr cc = NEW(CharClass); |
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40 cc->type = 'a'; |
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41 cc->cond.w.word = ri->tokenValue; |
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42 cc->cond.w.length = ri->ptr - ri->tokenValue; |
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43 cc->cond.range.begin = cc->cond.range.end = *ri->tokenValue; |
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44 return cc; |
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45 } |
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46 |
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47 /* |
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48 cond.range.begin cond.range.end |
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49 |----------------| |
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50 1.b---e |
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51 2.b------e |
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52 3.b------------e |
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53 4.b-----------------------e |
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54 5.b----------------------------e |
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55 |
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56 |----------------| |
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57 6. b---------e |
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58 7. b----------------e |
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59 8. b---------------------e |
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60 |
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61 |----------------| |
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62 9. b-----e |
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63 10. b--------e |
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64 11. b-------------e |
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65 |
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66 |----------------| |
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67 12. b-----e |
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68 |
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69 |----------------| |
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70 13. b--e |
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71 |
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72 */ |
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73 CharClassPtr insertCharClass(CharClassPtr cc, unsigned long begin, unsigned long end) { |
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74 if (cc == NULL) { |
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75 createCharClassRange(begin,end,0,0); |
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76 } |
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77 if (end < cc->cond.range.begin ) { // 1 |
147 | 78 if (cc->left) { |
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79 cc->left = insertCharClass(cc->left,begin,end); |
147 | 80 } else { |
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81 cc->left = createCharClassRange(begin,end,0,0); |
147 | 82 } |
152 | 83 return cc; |
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84 } else if (end == cc->cond.range.begin ) { // 2 |
147 | 85 cc->cond.range.begin = begin; |
150 | 86 return cc; |
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87 } else if (end <= cc->cond.range.end) { // 3,4,6,7,9,10 |
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88 if (begin < cc->cond.range.begin) { // 3,4 |
147 | 89 cc->cond.range.begin = begin; |
90 } | |
150 | 91 return cc; |
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92 } else if (begin > cc->cond.range.end ) { // 13 |
147 | 93 if (cc->right) { |
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94 cc->right = insertCharClass(cc->right,begin,end); |
147 | 95 } else { |
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96 cc->right = createCharClassRange(begin,end,0,0); |
147 | 97 } |
151 | 98 return cc; |
150 | 99 } |
100 if (cc->right) { | |
151 | 101 CharClassPtr right = cc->right; |
102 begin = cc->cond.range.begin; | |
103 free(cc); | |
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104 return insertCharClass(right,begin,end); |
150 | 105 } |
106 if (begin >= cc->cond.range.begin && begin <= cc->cond.range.end) { // 12 | |
151 | 107 if (end > cc->cond.range.end) cc->cond.range.end = end; // 11,8 |
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108 } else if (begin < cc->cond.range.begin) { // 5 |
147 | 109 cc->cond.range.begin = begin; |
150 | 110 cc->cond.range.end = end; |
111 } else { | |
112 printf("insertCharClass Error : begin %lu end %lu cc->begin %lu cc->end %lu\n", begin,end,cc->cond.range.begin,cc->cond.range.end); | |
147 | 113 } |
114 return cc; | |
142 | 115 } |
125 | 116 |
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117 // <charClass> ::= '['<literal>'-'<literal>']' |
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118 static |
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119 NodePtr charClass(RegexInfoPtr ri) { |
125 | 120 CharClassPtr cc = NEW(CharClass); |
135 | 121 NodePtr n = createNode(ri,'c',cc,0,0); |
126 | 122 cc->type = 'r'; |
142 | 123 cc->nextState.bitContainer = 0; |
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124 cc->left = NULL; |
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125 cc->right = NULL; |
142 | 126 RangeListPtr rangeList = &cc->cond.range; |
147 | 127 rangeList->begin = *ri->ptr; |
128 rangeList->end = *ri->ptr; | |
145
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129 rangeList->next = NULL; |
130
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130 |
135 | 131 for (ri->ptr++; *ri->ptr && *ri->ptr != ']'; ri->ptr++) { |
132 if (*ri->ptr == '-') { | |
147 | 133 rangeList->end = *(ri->ptr + 1); |
135 | 134 ri->ptr++; |
135 continue; | |
136 } | |
137 if (ri->ptr[0] == 0 || ri->ptr[0] == ']') break; | |
126 | 138 rangeList->next = NEW(RangeList); |
125 | 139 rangeList = rangeList->next; |
147 | 140 rangeList->begin = *ri->ptr; |
141 rangeList->end = *ri->ptr; | |
125 | 142 rangeList->next = NULL; |
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143 } |
147 | 144 |
150 | 145 RangeListPtr r = cc->cond.range.next; |
146 cc->cond.range.next = 0; | |
147 for (; r; r = r->next) { | |
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148 cc = insertCharClass(cc, r->begin, r->end); |
147 | 149 } |
150 | |
142 | 151 // TODO literal support |
152 // merge rangeList here | |
135 | 153 if (*ri->ptr) ri->ptr++; |
154 token(ri); | |
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155 return n; |
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156 } |
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157 |
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158 // <literal> ::= [a-z][A-Z][0-9] |
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159 static |
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160 NodePtr literal(RegexInfoPtr ri) { |
134 | 161 CharClassPtr cc = createCharClassWord(ri); |
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162 token(ri); |
134 | 163 NodePtr n = createNode(ri,'a',cc,0,0); |
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164 return n; |
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165 } |
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166 |
133
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Look ahead '*'
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167 static |
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168 void token(RegexInfoPtr ri) { |
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169 while (ri->ptr[0] != '\0') { |
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170 if (ri->ptr[0] == '('){ |
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171 ri->ptr++; |
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172 ri->tokenType = '('; |
118 | 173 ri->tokenValue = NULL; |
82
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174 return; |
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175 } else if (ri->ptr[0] == ')') { |
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176 ri->ptr++; |
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177 ri->tokenType = ')'; |
118 | 178 ri->tokenValue = ri->ptr; |
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179 return; |
135 | 180 } else if (ri->ptr[0] == ']') { |
181 ri->ptr++; | |
182 ri->tokenType = ']'; | |
183 ri->tokenValue = ri->ptr; | |
184 return; | |
82
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185 } else if (ri->ptr[0] == '|'){ |
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186 ri->ptr++; |
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187 ri->tokenType = '|'; |
118 | 188 ri->tokenValue = NULL; |
82
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189 return; |
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190 } else if (ri->ptr[0] == '*'){ |
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191 ri->ptr++; |
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192 ri->tokenType = '*'; |
118 | 193 ri->tokenValue = NULL; |
82
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194 return; |
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195 } else if (ri->ptr[0] == '\\'){ |
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196 // need more proccesing |
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197 /* |
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198 \277 |
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199 \0xa5 |
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200 \[ |
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201 \\ |
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202 \utf-8 etc... |
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203 */ |
142 | 204 } else if (ri->ptr[0] == '[') { |
205 ri->ptr++; | |
206 ri->tokenType = 'c'; | |
207 ri->tokenValue = ri->ptr; | |
208 return; | |
82
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209 } else { |
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210 ri->tokenType = 'a'; |
118 | 211 ri->tokenValue = ri->ptr; |
134 | 212 if (isalnum(ri->ptr[0])) { |
122 | 213 ri->ptr++; |
214 } | |
82
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215 return; |
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216 } |
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217 } |
134 | 218 ri->tokenType = 0; |
219 ri->tokenValue = NULL; | |
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220 return; |
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221 } |
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222 |
130
7925e9abb078
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223 // <regexAtom> ::= <literal>|<charClass>|<group> |
112
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224 static |
82
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225 NodePtr regexAtom(RegexInfoPtr ri) { |
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226 |
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227 NodePtr n = NULL; |
124 | 228 if (ri->tokenType == 'c') n = charClass(ri); |
134 | 229 else if (ri->tokenType == 'a') n = literal(ri); |
230 else if (ri->tokenType == '(') { | |
231 n = regex(ri); | |
232 if (ri->tokenType != ')') { | |
233 // error | |
234 } | |
235 token(ri); | |
236 } | |
237 if (ri->tokenType == '*') { | |
238 n = createNode(ri,'*',0,n,0); | |
239 token(ri); | |
240 } | |
82
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241 return n; |
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242 } |
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243 |
178
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244 RegexInfoPtr createRegexInfo (RegexInfoPtr ri) { |
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245 ri->stateNumber++; |
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246 return ri; |
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247 } |
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248 |
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249 |
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250 // <regex> ::= <regexAtom> | <regexAtom>'*'<regex> | <regexAtom>'|'<regex> | <regexAtom><regexAtom>'*' | <regexAtom><regex> |
82
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251 NodePtr regex(RegexInfoPtr ri) { |
134 | 252 token(ri); |
128 | 253 NodePtr n = regexAtom(ri); |
134 | 254 while (ri->tokenType) { |
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255 if (ri->tokenType == '*') { |
134 | 256 n = createNode(ri,'*',0,n,0); |
257 token(ri); | |
258 return n; | |
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259 } else if (ri->tokenType == '|') { |
134 | 260 n = createNode(ri,'|',0,n,0); |
133
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261 NodePtr n1 = regex(ri); |
134 | 262 n->right = n1; |
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263 } else if (ri->tokenType == ')') { |
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264 return n; |
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265 } else { |
134 | 266 n = createNode(ri,'+',0,n,0); |
180
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267 NodePtr n1 = regexAtom(ri); |
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268 n->right = n1; |
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269 } |
134 | 270 } |
271 return n; | |
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272 } |