root/regex/regfree.c

DEFINITIONS

1. API_EXPORT

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

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

/*
 - regfree - free everything
 = API_EXPORT(void) regfree(regex_t *);
 */
API_EXPORT(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);
}