1 | /*
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2 | * testAutomata.c: simple module for testing regexp automata
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3 | *
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4 | * See Copyright for the status of this software.
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5 | *
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6 | * Daniel Veillard <veillard@redhat.com>
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7 | */
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8 |
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9 | #include "libxml.h"
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10 | #ifdef LIBXML_AUTOMATA_ENABLED
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11 | #include <string.h>
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12 |
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13 | #include <libxml/tree.h>
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14 | #include <libxml/xmlautomata.h>
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15 |
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16 | static int scanNumber(char **ptr) {
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17 | int ret = 0;
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18 | char *cur;
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19 |
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20 | cur = *ptr;
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21 | while ((*cur >= '0') && (*cur <= '9')) {
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22 | ret = ret * 10 + (*cur - '0');
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23 | cur++;
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24 | }
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25 | *ptr = cur;
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26 | return(ret);
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27 | }
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28 |
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29 | static void
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30 | testRegexpFile(const char *filename) {
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31 | FILE *input;
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32 | char expr[5000];
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33 | int len;
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34 | int ret;
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35 | int i;
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36 | xmlAutomataPtr am;
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37 | xmlAutomataStatePtr states[1000];
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38 | xmlRegexpPtr regexp = NULL;
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39 | xmlRegExecCtxtPtr exec = NULL;
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40 |
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41 | for (i = 0;i<1000;i++)
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42 | states[i] = NULL;
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43 |
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44 | input = fopen(filename, "r");
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45 | if (input == NULL) {
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46 | xmlGenericError(xmlGenericErrorContext,
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47 | "Cannot open %s for reading\n", filename);
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48 | return;
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49 | }
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50 |
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51 | am = xmlNewAutomata();
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52 | if (am == NULL) {
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53 | xmlGenericError(xmlGenericErrorContext,
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54 | "Cannot create automata\n");
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55 | fclose(input);
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56 | return;
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57 | }
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58 | states[0] = xmlAutomataGetInitState(am);
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59 | if (states[0] == NULL) {
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60 | xmlGenericError(xmlGenericErrorContext,
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61 | "Cannot get start state\n");
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62 | xmlFreeAutomata(am);
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63 | fclose(input);
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64 | return;
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65 | }
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66 | ret = 0;
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67 |
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68 | while (fgets(expr, 4500, input) != NULL) {
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69 | if (expr[0] == '#')
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70 | continue;
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71 | len = strlen(expr);
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72 | len--;
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73 | while ((len >= 0) &&
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74 | ((expr[len] == '\n') || (expr[len] == '\t') ||
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75 | (expr[len] == '\r') || (expr[len] == ' '))) len--;
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76 | expr[len + 1] = 0;
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77 | if (len >= 0) {
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78 | if ((am != NULL) && (expr[0] == 't') && (expr[1] == ' ')) {
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79 | char *ptr = &expr[2];
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80 | int from, to;
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81 |
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82 | from = scanNumber(&ptr);
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83 | if (*ptr != ' ') {
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84 | xmlGenericError(xmlGenericErrorContext,
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85 | "Bad line %s\n", expr);
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86 | break;
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87 | }
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88 | if (states[from] == NULL)
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89 | states[from] = xmlAutomataNewState(am);
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90 | ptr++;
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91 | to = scanNumber(&ptr);
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92 | if (*ptr != ' ') {
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93 | xmlGenericError(xmlGenericErrorContext,
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94 | "Bad line %s\n", expr);
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95 | break;
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96 | }
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97 | if (states[to] == NULL)
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98 | states[to] = xmlAutomataNewState(am);
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99 | ptr++;
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100 | xmlAutomataNewTransition(am, states[from], states[to],
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101 | BAD_CAST ptr, NULL);
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102 | } else if ((am != NULL) && (expr[0] == 'e') && (expr[1] == ' ')) {
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103 | char *ptr = &expr[2];
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104 | int from, to;
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105 |
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106 | from = scanNumber(&ptr);
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107 | if (*ptr != ' ') {
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108 | xmlGenericError(xmlGenericErrorContext,
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109 | "Bad line %s\n", expr);
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110 | break;
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111 | }
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112 | if (states[from] == NULL)
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113 | states[from] = xmlAutomataNewState(am);
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114 | ptr++;
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115 | to = scanNumber(&ptr);
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116 | if (states[to] == NULL)
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117 | states[to] = xmlAutomataNewState(am);
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118 | xmlAutomataNewEpsilon(am, states[from], states[to]);
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119 | } else if ((am != NULL) && (expr[0] == 'f') && (expr[1] == ' ')) {
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120 | char *ptr = &expr[2];
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121 | int state;
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122 |
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123 | state = scanNumber(&ptr);
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124 | if (states[state] == NULL) {
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125 | xmlGenericError(xmlGenericErrorContext,
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126 | "Bad state %d : %s\n", state, expr);
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127 | break;
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128 | }
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129 | xmlAutomataSetFinalState(am, states[state]);
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130 | } else if ((am != NULL) && (expr[0] == 'c') && (expr[1] == ' ')) {
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131 | char *ptr = &expr[2];
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132 | int from, to;
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133 | int min, max;
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134 |
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135 | from = scanNumber(&ptr);
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136 | if (*ptr != ' ') {
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137 | xmlGenericError(xmlGenericErrorContext,
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138 | "Bad line %s\n", expr);
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139 | break;
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140 | }
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141 | if (states[from] == NULL)
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142 | states[from] = xmlAutomataNewState(am);
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143 | ptr++;
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144 | to = scanNumber(&ptr);
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145 | if (*ptr != ' ') {
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146 | xmlGenericError(xmlGenericErrorContext,
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147 | "Bad line %s\n", expr);
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148 | break;
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149 | }
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150 | if (states[to] == NULL)
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151 | states[to] = xmlAutomataNewState(am);
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152 | ptr++;
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153 | min = scanNumber(&ptr);
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154 | if (*ptr != ' ') {
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155 | xmlGenericError(xmlGenericErrorContext,
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156 | "Bad line %s\n", expr);
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157 | break;
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158 | }
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159 | ptr++;
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160 | max = scanNumber(&ptr);
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161 | if (*ptr != ' ') {
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162 | xmlGenericError(xmlGenericErrorContext,
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163 | "Bad line %s\n", expr);
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164 | break;
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165 | }
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166 | ptr++;
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167 | xmlAutomataNewCountTrans(am, states[from], states[to],
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168 | BAD_CAST ptr, min, max, NULL);
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169 | } else if ((am != NULL) && (expr[0] == '-') && (expr[1] == '-')) {
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170 | /* end of the automata */
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171 | regexp = xmlAutomataCompile(am);
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172 | xmlFreeAutomata(am);
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173 | am = NULL;
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174 | if (regexp == NULL) {
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175 | xmlGenericError(xmlGenericErrorContext,
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176 | "Failed to compile the automata");
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177 | break;
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178 | }
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179 | } else if ((expr[0] == '=') && (expr[1] == '>')) {
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180 | if (regexp == NULL) {
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181 | printf("=> failed not compiled\n");
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182 | } else {
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183 | if (exec == NULL)
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184 | exec = xmlRegNewExecCtxt(regexp, NULL, NULL);
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185 | if (ret == 0) {
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186 | ret = xmlRegExecPushString(exec, NULL, NULL);
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187 | }
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188 | if (ret == 1)
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189 | printf("=> Passed\n");
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190 | else if ((ret == 0) || (ret == -1))
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191 | printf("=> Failed\n");
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192 | else if (ret < 0)
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193 | printf("=> Error\n");
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194 | xmlRegFreeExecCtxt(exec);
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195 | exec = NULL;
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196 | }
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197 | ret = 0;
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198 | } else if (regexp != NULL) {
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199 | if (exec == NULL)
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200 | exec = xmlRegNewExecCtxt(regexp, NULL, NULL);
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201 | ret = xmlRegExecPushString(exec, BAD_CAST expr, NULL);
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202 | } else {
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203 | xmlGenericError(xmlGenericErrorContext,
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204 | "Unexpected line %s\n", expr);
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205 | }
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206 | }
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207 | }
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208 | fclose(input);
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209 | if (regexp != NULL)
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210 | xmlRegFreeRegexp(regexp);
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211 | if (exec != NULL)
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212 | xmlRegFreeExecCtxt(exec);
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213 | if (am != NULL)
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214 | xmlFreeAutomata(am);
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215 | }
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216 |
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217 | int main(int argc, char **argv) {
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218 |
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219 | xmlInitMemory();
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220 |
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221 | if (argc == 1) {
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222 | int ret;
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223 | xmlAutomataPtr am;
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224 | xmlAutomataStatePtr start, cur;
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225 | xmlRegexpPtr regexp;
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226 | xmlRegExecCtxtPtr exec;
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227 |
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228 | am = xmlNewAutomata();
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229 | start = xmlAutomataGetInitState(am);
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230 |
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231 | /* generate a[ba]*a */
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232 | cur = xmlAutomataNewTransition(am, start, NULL, BAD_CAST"a", NULL);
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233 | xmlAutomataNewTransition(am, cur, cur, BAD_CAST"b", NULL);
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234 | xmlAutomataNewTransition(am, cur, cur, BAD_CAST"a", NULL);
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235 | cur = xmlAutomataNewCountTrans(am, cur, NULL, BAD_CAST"a", 2, 3, NULL);
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236 | xmlAutomataSetFinalState(am, cur);
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237 |
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238 | /* compile it in a regexp and free the automata */
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239 | regexp = xmlAutomataCompile(am);
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240 | xmlFreeAutomata(am);
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241 |
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242 | /* test the regexp */
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243 | xmlRegexpPrint(stdout, regexp);
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244 | exec = xmlRegNewExecCtxt(regexp, NULL, NULL);
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245 | ret = xmlRegExecPushString(exec, BAD_CAST"a", NULL);
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246 | if (ret == 1)
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247 | printf("final\n");
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248 | else if (ret < 0)
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249 | printf("error\n");
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250 | ret =xmlRegExecPushString(exec, BAD_CAST"a", NULL);
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251 | if (ret == 1)
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252 | printf("final\n");
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253 | else if (ret < 0)
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254 | printf("error\n");
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255 | ret =xmlRegExecPushString(exec, BAD_CAST"b", NULL);
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256 | if (ret == 1)
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257 | printf("final\n");
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258 | else if (ret < 0)
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259 | printf("error\n");
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260 | ret =xmlRegExecPushString(exec, BAD_CAST"a", NULL);
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261 | if (ret == 1)
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262 | printf("final\n");
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263 | else if (ret < 0)
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264 | printf("error\n");
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265 | ret =xmlRegExecPushString(exec, BAD_CAST"a", NULL);
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266 | if (ret == 1)
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267 | printf("final\n");
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268 | else if (ret < 0)
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269 | printf("error\n");
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270 | ret =xmlRegExecPushString(exec, BAD_CAST"a", NULL);
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271 | if (ret == 1)
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272 | printf("final\n");
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273 | else if (ret < 0)
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274 | printf("error\n");
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275 | ret =xmlRegExecPushString(exec, BAD_CAST"a", NULL);
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276 | if (ret == 1)
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277 | printf("final\n");
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278 | else if (ret < 0)
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279 | printf("error\n");
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280 | if (ret == 0) {
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281 | ret = xmlRegExecPushString(exec, NULL, NULL);
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282 | if (ret == 1)
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283 | printf("final\n");
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284 | else if (ret < 0)
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285 | printf("error\n");
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286 | }
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287 | xmlRegFreeExecCtxt(exec);
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288 |
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289 | /* free the regexp */
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290 | xmlRegFreeRegexp(regexp);
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291 | } else {
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292 | int i;
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293 |
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294 | for (i = 1;i < argc;i++)
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295 | testRegexpFile(argv[i]);
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296 | }
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297 |
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298 | xmlCleanupParser();
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299 | xmlMemoryDump();
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300 | return(0);
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301 | }
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302 |
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303 | #else
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304 | #include <stdio.h>
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305 | int main(int argc ATTRIBUTE_UNUSED, char **argv ATTRIBUTE_UNUSED) {
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306 | printf("%s : Automata support not compiled in\n", argv[0]);
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307 | return(0);
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308 | }
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309 | #endif /* LIBXML_AUTOMATA_ENABLED */
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