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  1. #include <stdio.h>
  2. #include <regex.h>
  3. //
  4. #define restrict /**/
  5. //
  6. //
  7. int
  8. regex_match (char *restrict pattern,
  9.              const char *restrict string,
  10.              size_t sub_size, char *restrict sub[restrict],
  11.              int cflags, int eflags, int verbose)
  12. {
  13.     const int  msg_size = 200;
  14.     char       msg[msg_size];
  15.     //
  16.     regmatch_t pmatch[sub_size];
  17.     size_t     n;
  18.     size_t     m;
  19.     size_t     d;
  20.     //
  21.     int       status;
  22.     regex_t   re;
  23.     //
  24.     status = regcomp (&re, pattern, cflags);
  25.     //
  26.     if (status != 0)
  27.       {
  28.         if (verbose)
  29.           {
  30.             regerror (status, &re, msg, msg_size);
  31.             fprintf (stderr, "%s\n", msg);
  32.           }
  33.         return (status);
  34.       }
  35.     //
  36.     status = regexec (&re, string, sub_size, pmatch,
  37.                       eflags);
  38.     //
  39.     if (status != 0)
  40.       {
  41.         if (verbose)
  42.           {
  43.             regerror (status, &re, msg, msg_size);
  44.             fprintf (stderr, "%s\n", msg);
  45.           }
  46.       }
  47.     else
  48.       {
  49.         for (n=0; n < sub_size; n++)
  50.           {
  51.             for (d = 0, m = pmatch[n].rm_so;
  52.                  m >= 0 && m < pmatch[n].rm_eo;
  53.                  m++, d++)
  54.               {
  55.                 sub[n][d] = string[m];
  56.               }
  57.             sub[n][d] = '\0';
  58.           }
  59.       }
  60.     //
  61.     regfree (&re);
  62.     //
  63.     return (status);
  64. }
  65. //
  66. //
  67. //
  68. int
  69. main (void)
  70. {
  71.     int   result;
  72.     char *string       = "Ciao amore mio";
  73.     char *re           = "Ciao (amo)re";
  74.     char  sub0[200];
  75.           sub0[0] = '\0';
  76.     char  sub1[200];
  77.           sub1[0] = '\0';
  78.     char *sub[] = {sub0, sub1};
  79.     //
  80.     result = regex_match (re, string, 2, sub, REG_EXTENDED,
  81.                           0, 1);
  82.     //
  83.     if (result == 0)
  84.       {
  85.         printf ("Il modello \"%s\" trova corrispondenza ",
  86.                 re);
  87.         printf ("nella stringa \"%s\", precisamente ",
  88.                 string);
  89.         printf ("nella porzione \"%s\", mentre la ",
  90.                 sub[0]);
  91.         printf ("sottostringa estratta รจ \"%s\".\n",
  92.                 sub[1]);
  93.       }
  94.     else
  95.       {
  96.         printf ("Il modello \"%s\" ", re);
  97.         printf ("NON trova corrispondenza ");
  98.         printf ("nella stringa \"%s\"\n", string);
  99.       }
  100.     return 0;
  101. }
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/J0O8h
language:
C (gcc 8.3)
created:
12 years ago
visibility:
public

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