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annotate c/regexParser/main.cc @ 71:58d2b10988c9

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move ptr++ in token()
author Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
date Tue, 25 Aug 2015 20:56:26 +0900
parents 87dff3a124ab
children c4b934048e2a
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
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1 /*
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2 * <literal> ::= [a-z][A-Z][0-9]
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3 * <charClass> ::= '['<literal>'-'<literal>']'
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4 * <group> ::= '('<regex>')'
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5 * <regexAtom> ::= <literal>|<charClass>|<group>
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6 * <regex> ::= <regexAtom>|<regexAtom>'*'|<regexAtom>'|'<regex>|<regexAtom><regex>
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7 */
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8
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9 #include <stdio.h>
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10 #include <stdlib.h>
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11 #include <string.h>
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12
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13 typedef struct charClass {
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14 unsigned char table[256];
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15 struct utf8Range {
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16 unsigned char *begin;
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17 unsigned char *end;
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18 struct utf8Range *next;
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19 } *rangeList;
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20 } CharClass, *CharClassPtr;
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21
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22 typedef struct node {
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23 unsigned char type;
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24 union value {
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25 charClass *cc;
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26 unsigned char character;
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27 } Value, *ValuePtr;
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28 struct node *self;
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29 struct node *parent;
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30 struct node *left;
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31 struct node *right;
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32 } Node, *NodePtr;
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33
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34 unsigned char *ptr;
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35 unsigned char tokenType;
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36 int tokenValue;
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37 NodePtr regexHeadNode;
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38
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39 NodePtr charClass();
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40 NodePtr group();
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41 NodePtr orexp();
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42 NodePtr asterisk();
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43 NodePtr regex();
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44 NodePtr createNode(unsigned char,NodePtr,NodePtr);
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45 extern void token();
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46 extern NodePtr regexAtom();
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47
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48
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49 bool isLiteral(char c) {
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50 if (*ptr > 0x7f) return true;
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51 else if (*ptr == '(') return false;
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52 else if (*ptr == '[') return false;
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53 else if (*ptr == '|') return false;
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54 else if (*ptr == '*') return false;
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55 return true;
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56 }
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58 void printNodeDate(NodePtr n) {
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59 puts("---------------------");
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60 printf("Self Node char : %c\n", n->Value.character);
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61 printf("Self Node addr : %p\n", n->self);
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62 printf("left Node addr : %p\n", n->left);
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63 printf("right Node addr : %p\n", n->right);
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64 puts("---------------------");
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65 puts("");
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66 }
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68 NodePtr createNode(unsigned char character, NodePtr left, NodePtr right) {
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69 NodePtr n = (NodePtr)malloc(sizeof(Node));
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70 n->self = n;
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71 n->Value.character = character;
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72 n->left = left;
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73 n->right = right;
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74
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75 printNodeDate(n);
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76 return n;
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77 }
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78
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79 // <charClass> ::= '['<literal>'-'<literal>']'
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80 NodePtr charClass() {
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81 NodePtr n = (NodePtr)malloc(sizeof(Node));
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82 unsigned char startChar = *ptr;
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83 while (*ptr == '-') {
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84 ptr++;
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85 }
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86 unsigned char endChar = *ptr;
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87 unsigned char *charTable = (unsigned char*)malloc(sizeof(char)*256);
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88
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89 return n;
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90 }
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91
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92 // <literal> ::= [a-z][A-Z][0-9]
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93 NodePtr literal() {
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94 NodePtr n = createNode(*ptr,0,0);
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95 ptr++;
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96 return n;
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97 }
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98
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99 // <group> ::= '('<regex>')'
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100 NodePtr group() {
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101 NodePtr n = regex();
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102 if (*ptr == ')') {
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103 n = createNode('(',n,0);
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104 } else {
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105 // ) reqiured
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106 }
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107 return n;
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108 }
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109
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110
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111
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112 void token() {
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113 while (*ptr != '\0') {
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114 if ((*ptr == '(') || (*ptr == ')')) {
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115 ptr++;
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116 tokenType = '(';
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117 tokenValue = 0;
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118 if (ptr[1] == ')') {
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119 ptr++;
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120 }
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121 return;
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122 } else if (*ptr == '[') {
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123 ptr++;
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124 tokenType = '[';
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125 tokenValue = *ptr;
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126 if (ptr[1] == ']') {
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127 ptr++;
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128 }
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129 return;
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130 } else if (*ptr == '|'){
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131 ptr++;
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132 tokenType = '|';
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133 tokenValue = 0;
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134 return;
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135 } else if (*ptr == '*'){
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136 ptr++;
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137 tokenType = '*';
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138 tokenValue = 0;
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139 return;
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140 }
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141
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142 tokenType = 'a';
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143 tokenValue = *ptr;
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144 return;
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145
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146 if (*ptr == '\\') ptr++; // need more proccesing
8fd3d35e9861 add token function
masa
parents: 62
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147 /*
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masa
parents: 62
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148 \277
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masa
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149 \0xa5
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masa
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150 \[
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masa
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151 \\
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masa
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152 \utf-8 etc...
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masa
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153 */
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masa
parents: 62
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154
55
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 54
diff changeset
155 }
71
58d2b10988c9 move ptr++ in token()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 70
diff changeset
156
58d2b10988c9 move ptr++ in token()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 70
diff changeset
157 tokenType = 0;
58d2b10988c9 move ptr++ in token()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 70
diff changeset
158 tokenValue = 0;
58d2b10988c9 move ptr++ in token()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 70
diff changeset
159 return;
55
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 54
diff changeset
160 }
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 54
diff changeset
161
64
e0ad6c145f89 remove some errors
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
162 // <regexAtom> ::= <literal>|<charClass>|<group>
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
163 NodePtr regexAtom() {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
164
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
165 token();
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
166 NodePtr n = NULL;
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
167 if (tokenType == 'a') n = literal();
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
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168 else if (tokenType == '[') n = charClass();
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
169 else if (tokenType == '(') n = group();
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
170
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
171 return n;
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
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172 }
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parents: 63
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173
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
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174 // <regex> ::= <regexAtom>|<regexAtom>'*'|<regexAtom>'|'<regex>|<regexAtom><regex>
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
175 NodePtr regex() {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
176 NodePtr n = regexAtom();
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
177 while (*ptr) {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
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178 token();
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
179 if (tokenType == '*') {
71
58d2b10988c9 move ptr++ in token()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 70
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180 n = createNode('*',n,0);
64
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
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181 } else if (tokenType == '|') {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
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182 NodePtr n1 = regex();
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
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183 n = createNode('|',n,n1);
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
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184 } else {
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
185 NodePtr n1 = regex();
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
186 n = createNode('+',n,n1);
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
187 }
67
4842ca2cf8ee print character
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 66
diff changeset
188 } return n;
68
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
189 }
66
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
190 /*
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
191 * e.g.
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
192 *
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Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
193 * % ./regexParser -regex abc
68
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
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194 * c
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
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195 * +
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Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
196 * b
66
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
197 * +
68
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
198 * a
66
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
199 *
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
200 * % ./regexParser -regex (a*|bc)d
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
201 *
68
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
202 * d
66
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
203 * +
68
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
204 * c
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
205 * +
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
206 * b
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
207 * |
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
208 * *
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
209 * a
66
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
210 */
68
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
211
69
eecddded9b91 implement printTree
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 68
diff changeset
212 void descendTree(NodePtr n) {
eecddded9b91 implement printTree
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 68
diff changeset
213 static int d = 0;
68
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
214 if (n->right != NULL) {
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
215 d++;
69
eecddded9b91 implement printTree
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 68
diff changeset
216 descendTree(n->right);
eecddded9b91 implement printTree
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 68
diff changeset
217 d--;
eecddded9b91 implement printTree
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 68
diff changeset
218 }
eecddded9b91 implement printTree
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 68
diff changeset
219 printf("%*c%c\n",d*4, ' ',n->Value.character);
eecddded9b91 implement printTree
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 68
diff changeset
220 if (n->left != NULL) {
68
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
221 d++;
69
eecddded9b91 implement printTree
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 68
diff changeset
222 descendTree(n->left);
eecddded9b91 implement printTree
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 68
diff changeset
223 d--;
68
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
224 }
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
225 }
d27b3af1fe75 remove string()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 67
diff changeset
226
66
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
227 void printTree(NodePtr n) {
69
eecddded9b91 implement printTree
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 68
diff changeset
228 descendTree(n);
66
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
229 }
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
230
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
231
62
a49b4a8b8c14 implement isLiteral
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 61
diff changeset
232 int main(int argc, char **argv)
55
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 54
diff changeset
233 {
56
8901bc071d33 implement string() and literal()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 55
diff changeset
234 for (int i = 1; i < argc; i++) {
8901bc071d33 implement string() and literal()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 55
diff changeset
235 if (strcmp(argv[i],"-regex") == 0) {
64
e0ad6c145f89 remove some errors
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 63
diff changeset
236 ptr = (unsigned char*)argv[i+1]; i++;
56
8901bc071d33 implement string() and literal()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 55
diff changeset
237 }
8901bc071d33 implement string() and literal()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 55
diff changeset
238 }
55
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 54
diff changeset
239
56
8901bc071d33 implement string() and literal()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 55
diff changeset
240 printf("regex : %s\n",ptr);
8901bc071d33 implement string() and literal()
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents: 55
diff changeset
241 NodePtr n = regex();
66
f8fb3b463f70 fix when '|' come procces
Masataka Kohagura <e085726@ie.u-ryukyu.ac.jp>
parents: 65
diff changeset
242 printTree(n);
45
89a198fa6b23 add dfrTobin
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
243 return 0;
89a198fa6b23 add dfrTobin
Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
parents:
diff changeset
244 }