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annotate regexParser/threadedSearch.cc @ 275:8879eb8c64a8

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remove segmentation fault
author Masataka Kohagura <kohagura@cr.ie.u-ryukyu.ac.jp>
date Sat, 30 Jan 2016 19:06:41 +0900
parents 5aa9d01926f1
children 7b4bcc7b5ae6
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1 #include <stdio.h>
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2 #include <stdlib.h>
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3
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4 #include "regexParser.h"
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5 #include "threadedSearch.h"
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6 #include "subsetConstruction.h"
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7
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8 void tSearch(TSValue tsv);
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9
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10 static
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11 TSValue stateNothing(TSValue tsv) {
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12 return tsv;
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13 }
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14
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15 static
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16 TSValue stateSkip(TSValue tsv) {
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17 tsv.buff.matchBegin = tsv.buff.buffptr;
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18 return tsv;
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19 }
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20
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21 static
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22 TSValue stateMatch(TSValue tsv) {
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23 fwrite(tsv.buff.matchBegin,tsv.buff.buffptr-tsv.buff.matchBegin-1,1,stdout);
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24 puts("");
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25 tsv.current = tsv.tg->stateList->tState;
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26 tsv.buff.buffptr--;
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27 tsv = stateSkip(tsv);
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28 return tsv;
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29 }
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30
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31 TStatePtr generateTState(StatePtr state, TransitionGeneratorPtr tg) {
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32 TStatePtr tState = NEW(TState);
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33 tState->state = state;
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34 state->tState = tState;
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35 int ccvSize = 0;
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36 CharClassWalkerPtr ccw = createCharClassWalker(state->cc);
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37 while (hasNext(ccw)) {
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38 getNext(ccw);
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39 ccvSize++;
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40 }
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41 tState->ccvSize = ccvSize;
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42 if (state->accept) {
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43 tState->stateSkip = tg->stateMatch;
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44 tState->stateContinue = tg->stateNothing;
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45 } else {
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46 tState->stateSkip = tg->stateSkip;
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47 tState->stateContinue = tg->stateNothing;
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48 }
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49 if (ccvSize == 0) return tState;
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50 else tState->ccv = (ccv*)malloc(sizeof(ccv)*ccvSize);
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51 ccw = createCharClassWalker(state->cc);
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52 int i = 0;
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53 while (hasNext(ccw)) {
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54 CharClassPtr cc = getNext(ccw);
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55 unsigned long begin = cc->cond.range.begin;
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56 unsigned long end = cc->cond.range.end;
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57 struct ccv *ccv = &tState->ccv[i++];
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58 ccv->begin = begin;
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59 ccv->end = end;
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60 ccv->tState = NULL;
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61 ccv->state = cc->nextState;
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62 ccv->w = cc->cond.w;
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63 }
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64 free(ccw);
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65 return tState;
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66 }
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67
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68 void tSearch(TSValue tsv) {
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69 next: while (tsv.buff.buffptr < tsv.buff.buffend) {
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70 unsigned char c = *tsv.buff.buffptr++;
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71 for (int i = 0; i < tsv.current->ccvSize; i++) {
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72 CCVPtr ccv = &tsv.current->ccv[i];
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73 if (c<ccv->begin) {
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74 tsv = tsv.current->stateSkip(tsv);
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75 goto next;
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76 } else if (c<=ccv->end) {
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77 // range matched.
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78 if (ccv->w.word) {
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79 // match the word.
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80 // if (not match) continue;
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81 }
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82 TStatePtr current = ccv->tState;
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83 if (current == NULL) {
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84 // create tSearch in next state.
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85 StatePtr state = tsv.tg->stateArray[ccv->state.bitContainer];
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86 if (state == NULL) {
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87 // on the fly subset construction.
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88 state = createState(tsv.tg,state->bitState);
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89 determinize(state,tsv.tg);
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90 tsv.tg->stateArray[state->bitState.bitContainer] = state;
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91 }
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92 if (state->tState == NULL) {
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93 current = generateTState(state,tsv.tg);
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94 ccv->tState = current;
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95 } else {
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96 ccv->tState = state->tState;
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97 }
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98 }
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99 tsv.current = ccv->tState;
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100 // tsv = tsv.current->stateContinue(tsv);
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101 goto next;
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102 }
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103 }
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104 tsv = tsv.current->stateSkip(tsv);
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105 }
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106 }
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107
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108 void threadedSearch(TransitionGeneratorPtr tg, Buffer buff) {
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109 TSValue tsv;
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110 tsv.buff = buff;
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111 tsv.tg = tg;
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112 tsv.result = NULL;
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113 tsv.tg->stateSkip = stateSkip;
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114 tsv.tg->stateMatch = stateMatch;
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115 tsv.tg->stateNothing = stateNothing;
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116 tsv.current = generateTState(tg->stateList,tg);
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117 tSearch(tsv);
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118 }