-static void
-S_swap_match_buff (pTHX_ regexp *prog)
-{
- regexp_paren_pair *t;
-
- PERL_ARGS_ASSERT_SWAP_MATCH_BUFF;
-
- if (!prog->swap) {
- /* We have to be careful. If the previous successful match
- was from this regex we don't want a subsequent paritally
- successful match to clobber the old results.
- So when we detect this possibility we add a swap buffer
- to the re, and switch the buffer each match. If we fail
- we switch it back, otherwise we leave it swapped.
- */
- Newxz(prog->swap, (prog->nparens + 1), regexp_paren_pair);
- }
- t = prog->swap;
- prog->swap = prog->offs;
- prog->offs = t;
-}
-