#include <unistd.h>
#include <pcre.h>
int main () {
pcre *re;
    const char *error;
    const char *subject ="test тест";
    int erroffset, rc;
    int ovector[30];

    re = pcre_compile(
            "^[А-Яа-я\\040]+$",              /* the pattern */
            0,                     /* default options */
            &error,               /* for error message */
            &erroffset,           /* for error offset */
            NULL );                /* use default character tables */

    if (re == NULL)
  {
   printf("PCRE compilation failed at offset %d: %s\n", erroffset, error);
  return 1;
  }

rc = pcre_exec(
    re,                   /* the compiled pattern */
    NULL,                 /* no extra data - we didn't study the pattern */
    subject,              /* the subject string */
    sizeof(*subject),     /* the length of the subject */
    0,                    /* start at offset 0 in the subject */
    0,                    /* default options */
    ovector,              /* output vector for substring information */
    30);
    if (rc < 0) {
        switch(rc) {
        case PCRE_ERROR_NOMATCH: printf("No match\n"); break;
                case PCRE_ERROR_BADUTF8: printf("BAD UTF8!!!\n"); break;
        default: printf("Matching error %d\n", rc); break;
        }

 pcre_free(re);
return 1;
}

printf("rc: %d\n",rc);
pcre_free(re);
return 0;

}