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regfree.c

#include <sys/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <regex.h>

#include "utils.h"
#include "regex2.h"

/*
 - regfree - free everything
 = extern void regfree(regex_t *);
 */
void
regfree(preg)
regex_t *preg;
{
      register struct re_guts *g;

      if (preg->re_magic != MAGIC1) /* oops */
            return;                 /* nice to complain, but hard */

      g = preg->re_g;
      if (g == NULL || g->magic != MAGIC2)      /* oops again */
            return;
      preg->re_magic = 0;           /* mark it invalid */
      g->magic = 0;                 /* mark it invalid */

      if (g->strip != NULL)
            free((char *)g->strip);
      if (g->sets != NULL)
            free((char *)g->sets);
      if (g->setbits != NULL)
            free((char *)g->setbits);
      if (g->must != NULL)
            free(g->must);
      free((char *)g);
}

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