Mercurial > hg > octave-lojdl > gnulib-hg
changeset 2803:27164d4a6258
(SET_HIGH_BOUND, MOVE_BUFFER_POINTER,
ELSE_EXTEND_BUFFER_HIGH_BOUND): New macros.
(EXTEND_BUFFER): Use them.
| author | Jim Meyering <jim@meyering.net> |
|---|---|
| date | Thu, 03 Aug 2000 23:10:05 +0000 |
| parents | 573f6905b417 |
| children | 347685a13058 |
| files | lib/regex.c |
| diffstat | 1 files changed, 33 insertions(+), 11 deletions(-) [+] |
line wrap: on
line diff
--- a/lib/regex.c +++ b/lib/regex.c @@ -1747,29 +1747,51 @@ reset the pointers that pointed into the old block to point to the correct places in the new one. If extending the buffer results in it being larger than MAX_BUF_SIZE, then flag memory exhausted. */ +#if __BOUNDED_POINTERS__ +# define SET_HIGH_BOUND(P) (__ptrhigh (P) = __ptrlow (P) + bufp->allocated) +# define MOVE_BUFFER_POINTER(P) \ + (__ptrlow (P) += incr, SET_HIGH_BOUND (P), __ptrvalue (P) += incr) +# define ELSE_EXTEND_BUFFER_HIGH_BOUND \ + else \ + { \ + SET_HIGH_BOUND (b); \ + SET_HIGH_BOUND (begalt); \ + if (fixup_alt_jump) \ + SET_HIGH_BOUND (fixup_alt_jump); \ + if (laststart) \ + SET_HIGH_BOUND (laststart); \ + if (pending_exact) \ + SET_HIGH_BOUND (pending_exact); \ + } +#else +# define MOVE_BUFFER_POINTER(P) (P) += incr +# define ELSE_EXTEND_BUFFER_HIGH_BOUND +#endif #define EXTEND_BUFFER() \ - do { \ + do { \ unsigned char *old_buffer = bufp->buffer; \ - if (bufp->allocated == MAX_BUF_SIZE) \ + if (bufp->allocated == MAX_BUF_SIZE) \ return REG_ESIZE; \ bufp->allocated <<= 1; \ if (bufp->allocated > MAX_BUF_SIZE) \ - bufp->allocated = MAX_BUF_SIZE; \ + bufp->allocated = MAX_BUF_SIZE; \ bufp->buffer = (unsigned char *) REALLOC (bufp->buffer, bufp->allocated);\ if (bufp->buffer == NULL) \ return REG_ESPACE; \ /* If the buffer moved, move all the pointers into it. */ \ if (old_buffer != bufp->buffer) \ { \ - b = (b - old_buffer) + bufp->buffer; \ - begalt = (begalt - old_buffer) + bufp->buffer; \ - if (fixup_alt_jump) \ - fixup_alt_jump = (fixup_alt_jump - old_buffer) + bufp->buffer;\ - if (laststart) \ - laststart = (laststart - old_buffer) + bufp->buffer; \ - if (pending_exact) \ - pending_exact = (pending_exact - old_buffer) + bufp->buffer; \ + int incr = bufp->buffer - old_buffer; \ + MOVE_BUFFER_POINTER (b); \ + MOVE_BUFFER_POINTER (begalt); \ + if (fixup_alt_jump) \ + MOVE_BUFFER_POINTER (fixup_alt_jump); \ + if (laststart) \ + MOVE_BUFFER_POINTER (laststart); \ + if (pending_exact) \ + MOVE_BUFFER_POINTER (pending_exact); \ } \ + ELSE_EXTEND_BUFFER_HIGH_BOUND \ } while (0)