diff options
Diffstat (limited to 'libc/misc/regex/regex_old.c')
| -rw-r--r-- | libc/misc/regex/regex_old.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/libc/misc/regex/regex_old.c b/libc/misc/regex/regex_old.c index e2824eda5..6bdd07f14 100644 --- a/libc/misc/regex/regex_old.c +++ b/libc/misc/regex/regex_old.c @@ -6099,7 +6099,18 @@ byte_re_match_2_internal ( { /* No. So allocate them with malloc. We need one extra element beyond `num_regs' for the `-1' marker GNU code uses. */ - regs->num_regs = MIN (RE_NREGS, num_regs + 1); +// regex specs say: +// "If REGS_UNALLOCATED, allocate space in the regs structure +// for max(RE_NREGS, re_nsub + 1) groups" +// but real-world testsuites fail with contrived examples +// with lots of groups. +// I don't see why we can't just allocate exact needed number. +// Incidentally, it makes RE_NREGS unused. +// +// regs->num_regs = MAX (RE_NREGS, num_regs + 1); - VERY WRONG +// regs->num_regs = MIN (RE_NREGS, num_regs + 1); - slightly less wrong +// good one which passes uclibc test/regex/tst-regex2.c: + regs->num_regs = num_regs + 1; regs->start = TALLOC (regs->num_regs, regoff_t); regs->end = TALLOC (regs->num_regs, regoff_t); if (regs->start == NULL || regs->end == NULL) |