static void
update_provides(const URPM__Package pkg, HV *provides) {
  if (pkg->h) {
    int len;
    struct rpmtd_s td, td_flags;
    unsigned int i;

    /* examine requires for files which need to be marked in provides */
    if (headerGet(pkg->h, RPMTAG_REQUIRENAME, &td, HEADERGET_DEFAULT)) {
      for (i = 0; i < rpmtdCount(&td); ++i) {
	const char *s = rpmtdNextString(&td);
	len = strlen(s);
	if (s[0] == '/') (void)hv_fetch(provides, s, len, 1);
      }
    }

    /* update all provides */
    if (headerGet(pkg->h, RPMTAG_PROVIDENAME, &td, HEADERGET_DEFAULT)) {
      char **list = td.data;
      rpmsenseFlags *flags = NULL;
      if (headerGet(pkg->h, RPMTAG_PROVIDEFLAGS, &td_flags, HEADERGET_DEFAULT))
	flags = td_flags.data;
      for (i = 0; i < rpmtdCount(&td); ++i) {
	len = strlen(list[i]);
	if (!strncmp(list[i], "rpmlib(", 7)) continue;
	update_hash_entry(provides, list[i], len, 1, flags && flags[i] & (RPMSENSE_PREREQ|RPMSENSE_SCRIPT_PREUN|RPMSENSE_SCRIPT_PRE|RPMSENSE_SCRIPT_POSTUN|RPMSENSE_SCRIPT_POST|RPMSENSE_LESS|RPMSENSE_EQUAL|RPMSENSE_GREATER),
			     pkg);
      }
    }
  } else {
    char *ps, *s, *es;

    if ((s = pkg->requires) != NULL && *s != 0) {
      ps = strchr(s, '@');
      /* examine requires for files which need to be marked in provides */
      while(ps != NULL) {
	if (s[0] == '/') {
	  *ps = 0; es = strchr(s, '['); if (!es) es = strchr(s, ' '); *ps = '@';
	  (void)hv_fetch(provides, s, es != NULL ? es-s : ps-s, 1);
	}
	s = ps + 1; ps = strchr(s, '@');
      }
      if (s[0] == '/') {
      es = strchr(s, '['); if (!es) es = strchr(s, ' ');
	(void)hv_fetch(provides, s, es != NULL ? (U32)(es-s) : strlen(s), 1);
      }
    }

    /* update all provides */
    if ((s = pkg->provides) != NULL && *s != 0) {
      ps = strchr(s, '@');
      while(ps != NULL) {
	*ps = 0; es = strchr(s, '['); if (!es) es = strchr(s, ' '); *ps = '@';
	update_hash_entry(provides, s, es != NULL ? es-s : ps-s, 1, es != NULL, pkg);
	s = ps + 1; ps = strchr(s, '@');
      }
      es = strchr(s, '['); if (!es) es = strchr(s, ' ');
      update_hash_entry(provides, s, es != NULL ? es-s : 0, 1, es != NULL, pkg);
    }
  }