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annotate c/regexParser/regexParser.cc @ 122:188d866227a4 pairPro

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fix
author Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
date Mon, 30 Nov 2015 23:43:53 +0900
parents aa266a4db47c
children c363a66dc1a7 4d6ac69801ad
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 #include <stdlib.h>
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2 #include <stdio.h>
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3 #include <string.h>
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4 #include <ctype.h>
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5 #include "regexParser.h"
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6 #include "error.h"
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7
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8 static NodePtr allocateNode();
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9 static NodePtr createNode(RegexInfoPtr,unsigned char*,NodePtr,NodePtr);
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10 static NodePtr charClass(RegexInfoPtr);
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11 static NodePtr group(RegexInfoPtr);
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12 static void token(RegexInfoPtr);
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13 static NodePtr regexAtom(RegexInfoPtr);
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14 NodePtr regex(RegexInfoPtr);
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15
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16 /**
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17 * Create a node of regex parse tree.
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18 * tokenType
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19 * regexPosition(state)
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20 * stateTransitionTable
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21 */
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22
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23 static
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24 NodePtr allocateNode() {
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25 NodePtr n = (NodePtr)malloc(sizeof(node));
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26 n->cc = (CharClassPtr)malloc(sizeof(CharClass));
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27 n->cc->cond = (ConditionList)malloc(sizeof(Condition));
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28 return n;
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29 }
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30
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31 static
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32 NodePtr createNode(RegexInfoPtr ri,unsigned char *character, NodePtr left, NodePtr right) {
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33 NodePtr n = allocateNode();
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34 if (n == NULL) {
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35 mallocFailedMessage();
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36 }
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37
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38 n->tokenType = ri->tokenType;
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39 n->left = left;
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40 n->right = right;
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41 n->nodeNumber = ri->nodeNumber;
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42 ri->nodeNumber++;
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43
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44 if (ri->tokenType == 'a') {
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45 ri->tokenType = 0;
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46 n->cc->cond->w = getWord(ri->tokenValue);
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47 } else {
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48 WordPtr w = (WordPtr)malloc(sizeof(Word));
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49 w->word = character;
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50 w->length = 1;
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51 n->cc->cond->w = w;
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52 }
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53 return n;
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54 }
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55
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56 // <charClass> ::= '['<literal>'-'<literal>']'
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57 static
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58 NodePtr charClass(RegexInfoPtr ri) {
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59 NodePtr n = allocateNode();
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60 if (n == NULL) {
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61 mallocFailedMessage();
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62 }
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63
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64 n->tokenType = ri->tokenType;
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65 n->nodeNumber = ri->nodeNumber;
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66 ri->nodeNumber++;
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67 n->cc->cond->w = (WordPtr)malloc(sizeof(Word));
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68
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69 int i = 0;
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70
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71 while (ri->ptr[i] != ']') {
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72 if (ri->ptr[i] == '-') {
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73 n->cc->begin = ri->ptr[i-1];
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74 n->cc->end = ri->ptr[i+1];
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75 }
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76 i++;
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77 }
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79 n->cc->cond->w->word = (unsigned char*)malloc(sizeof(unsigned char)*(i+1));
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80 strncpy((char*)n->cc->cond->w->word, (char*)ri->ptr,i+1);
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81 n->cc->cond->w->word[i] = '\0';
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82 ri->ptr += i+1;
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83
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84 return n;
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85 }
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86
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87 // <literal> ::= [a-z][A-Z][0-9]
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88 static
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89 NodePtr literal(RegexInfoPtr ri) {
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90 NodePtr n = createNode(ri,ri->ptr,0,0);
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91 return n;
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92 }
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93
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94 // <group> ::= '('<regex>')'
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95 static
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96 NodePtr group(RegexInfoPtr ri) {
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97 return regex(ri);
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98 }
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100 static
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101 void token(RegexInfoPtr ri) {
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102 while (ri->ptr[0] != '\0') {
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103 if (ri->ptr[0] == '('){
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104 ri->ptr++;
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105 ri->tokenType = '(';
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106 ri->tokenValue = NULL;
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107 if (ri->ptr[1] == ')') {
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108 ri->ptr++;
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109 }
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110 return;
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111 } else if (ri->ptr[0] == ')') {
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112 ri->ptr++;
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113 ri->tokenType = ')';
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114 ri->tokenValue = ri->ptr;
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115 return;
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116 } else if (ri->ptr[0] == '[') {
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117 ri->ptr++;
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118 ri->tokenType = 'c';
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119 ri->tokenValue = ri->ptr;
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120 if (ri->ptr[1] == ']') {
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121 ri->ptr++;
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122 }
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123 return;
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124 } else if (ri->ptr[0] == '|'){
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125 ri->ptr++;
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126 ri->tokenType = '|';
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127 ri->tokenValue = NULL;
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128 return;
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129 } else if (ri->ptr[0] == '*'){
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130 ri->ptr++;
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131 ri->tokenType = '*';
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132 ri->tokenValue = NULL;
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133 return;
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134 } else if (ri->ptr[0] == '\\'){
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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135 // need more proccesing
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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136 /*
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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137 \277
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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138 \0xa5
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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139 \[
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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140 \\
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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141 \utf-8 etc...
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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142 */
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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143 } else {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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144 ri->tokenType = 'a';
118
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 116
diff changeset
145 ri->tokenValue = ri->ptr;
122
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 121
diff changeset
146 while (isalnum(ri->ptr[0])) {
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 121
diff changeset
147 ri->ptr++;
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 121
diff changeset
148 }
82
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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149 return;
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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150 }
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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151 }
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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152 return;
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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153 }
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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154
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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155 // <regexAtom> ::= <literal>|<charClass>|<group>
112
ec485345daf9 some function use static
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 108
diff changeset
156 static
82
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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157 NodePtr regexAtom(RegexInfoPtr ri) {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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158
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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159 token(ri);
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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160 NodePtr n = NULL;
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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161 if (ri->tokenType == 'a') n = literal(ri);
122
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 121
diff changeset
162 else if (ri->tokenType == 'c') n = charClass(ri);
82
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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163 else if (ri->tokenType == '(') n = group(ri);
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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164
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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165 return n;
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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166 }
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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167
122
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 121
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168 // <regex> ::= <regexAtom> | <regexAtom><regex>'*' | <regexAtom>'*' | <regexAtom>'|'<regex> | <regexAtom><regex> | '(' regex ')'
82
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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169 NodePtr regex(RegexInfoPtr ri) {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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170 NodePtr n = regexAtom(ri);
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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171 while (ri->ptr[0]) {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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172 token(ri);
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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173 if (ri->tokenType == '*') {
118
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 116
diff changeset
174 unsigned char *syntax = (unsigned char*)malloc(sizeof(unsigned char));
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 116
diff changeset
175 syntax[0] = '*';
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 116
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176 n = createNode(ri,syntax,n,0);
82
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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177 } else if (ri->tokenType == '|') {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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178 NodePtr n1 = regex(ri);
118
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 116
diff changeset
179 unsigned char *syntax = (unsigned char*)malloc(sizeof(unsigned char));
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 116
diff changeset
180 syntax[0] = '|';
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 116
diff changeset
181 n = createNode(ri,syntax,n,n1);
82
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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182 } else if (ri->tokenType == ')') {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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183 return n;
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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184 } else {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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185 NodePtr n1 = regex(ri);
118
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 116
diff changeset
186 unsigned char *syntax = (unsigned char*)malloc(sizeof(unsigned char));
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 116
diff changeset
187 syntax[0] = '+';
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 116
diff changeset
188 n = createNode(ri,syntax,n,n1);
82
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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189 }
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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190 } return n;
1d9bbf922bb6 add createRegexTree.cc
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
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191 }