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  1. #include <stdio.h>
  2. #include <regex.h>
  3.  
  4. int
  5. regex_match (char *pattern, const char *string,
  6.              size_t sub_size, char **sub)
  7. {
  8.     regmatch_t match[sub_size];
  9.     size_t     n;
  10.     size_t     m;
  11.     size_t     d;
  12.     int        status;
  13.     regex_t    re;
  14.     status = regcomp (&re, pattern, REG_EXTENDED);
  15.     if (status != 0)
  16.       {
  17.         return (status);
  18.       }
  19.     status = regexec (&re, string, sub_size, match, 0);
  20.     if (status == 0)
  21.       {
  22.         for (n=0; n < sub_size; n++)
  23.           {
  24.             for (d = 0, m = match[n].rm_so;
  25.                  m >= 0 && m < match[n].rm_eo;
  26.                  m++, d++)
  27.               {
  28.                 sub[n][d] = string[m];
  29.               }
  30.             sub[n][d] = '\0';
  31.           }
  32.       }
  33.     regfree (&re);
  34.     return (status);
  35. }
  36.  
  37. int
  38. main (void)
  39. {
  40.     int   result;
  41.     char *string       = "Ciao amore mio";
  42.     char *re           = "Ciao (amo)re";
  43.     char  sub0[200];
  44.           sub0[0] = '\0';
  45.     char  sub1[200];
  46.           sub1[0] = '\0';
  47.     char *sub[] = {sub0, sub1};
  48.  
  49.     result = regex_match (re, string, 2, sub);
  50.  
  51.     if (result == 0)
  52.       {
  53.         printf ("Il modello \"%s\" trova corrispondenza ",
  54.                 re);
  55.         printf ("nella stringa \"%s\", precisamente ",
  56.                 string);
  57.         printf ("nella porzione \"%s\", mentre la ",
  58.                 sub[0]);
  59.         printf ("sottostringa estratta è \"%s\".\n",
  60.                 sub[1]);
  61.       }
  62.     else
  63.       {
  64.         printf ("Il modello \"%s\" ", re);
  65.         printf ("NON trova corrispondenza ");
  66.         printf ("nella stringa \"%s\"\n", string);
  67.       }
  68.     return 0;
  69. }
Success #stdin #stdout 0.01s 1852KB
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Il modello "Ciao (amo)re" trova corrispondenza nella stringa "Ciao amore mio", precisamente nella porzione "Ciao amore", mentre la sottostringa estratta è "amo".
https://ideone.com/U9Tka
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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