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