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1 #include <stdio.h>
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2 #include <stdlib.h>
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3 #include <regex.h>
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4
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5 #define __USE_GNU
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6 #include <string.h>
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7
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8 const size_t BUFSIZE = 5000;
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9 const size_t REMSIZE = 3;
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10
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11 const char *CLR_START = "-CLR_START-";
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12 const char *CLR_END = "-CLR_END-";
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13
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14 int main(int argc, char **argv)
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15 {
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16 char *buf = calloc(BUFSIZE, sizeof(char));
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17
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18 regex_t *re = calloc(1, sizeof(regex_t));
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19 regcomp(re, "(Hello)", REG_EXTENDED);
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20
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21 regmatch_t *rem = calloc(REMSIZE, sizeof(regmatch_t));
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22
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23 size_t CLR_START_len = strlen(CLR_START);
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24 size_t CLR_END_len = strlen(CLR_END);
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25
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26 size_t out_len = strlen(buf);
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27 if (out_len >= BUFSIZE)
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28 out_len = BUFSIZE - 1;
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29
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30 char *out = calloc(out_len, sizeof(char));
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31 unsigned int out_pos = 0;
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32
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33 while (fgets(buf, BUFSIZE, stdin))
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34 {
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35 regexec(re, buf, REMSIZE, rem, 0);
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36
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37 int i;
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38
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39 for (i = 0; i < REMSIZE; i++)
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40 fprintf(stderr, "%d %d \n", rem[i].rm_so, rem[i].rm_eo); //d// 20100327 PBA
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41
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42 for (i = 1; i < REMSIZE; i++)
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43 {
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44 int so = rem[i].rm_so;
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45 int eo = rem[i].rm_eo;
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46 int nso = BUFSIZE;
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47
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48 if ((i + 1) < REMSIZE)
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49 nso = rem[i + 1].rm_so;
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50 if (nso == -1)
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51 nso = BUFSIZE;
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52
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53 if (so >= 0 && eo >= 0)
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54 {
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55 int match_len = eo - so;
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56 out_len += CLR_START_len + CLR_END_len;
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57 out = (char *)realloc(out, out_len*sizeof(char));
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58 if (i == 0)
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59 {
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60 strncpy(&out[out_pos], buf, so);
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61 out_pos += so;
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62 }
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63 strncpy(&out[out_pos], CLR_START, CLR_START_len);
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64 out_pos += CLR_START_len;
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65 strncpy(&out[out_pos], &buf[so], match_len);
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66 out_pos += match_len;
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67 strncpy(&out[out_pos], CLR_END, CLR_END_len);
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68 out_pos += CLR_END_len;
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69 strncpy(&out[out_pos], &buf[eo], nso - eo);
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70 out_pos += nso - eo;
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71 }
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72 }
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73
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74 fputs(out, stdout);
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75 }
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76
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77 return 0;
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78 }
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