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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 รจ \"%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
comments (?)
stdin 
Standard input is empty
stdout 
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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