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* [newlib-cygwin/main] Cygwin: regex: fix faulty check for valid range expression
@ 2023-03-20 11:58 Corinna Vinschen
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From: Corinna Vinschen @ 2023-03-20 11:58 UTC (permalink / raw)
To: cygwin-cvs
https://sourceware.org/git/gitweb.cgi?p=newlib-cygwin.git;h=59241913330c15d25ea569f1309af1c746dc07fa
commit 59241913330c15d25ea569f1309af1c746dc07fa
Author: Corinna Vinschen <corinna@vinschen.de>
AuthorDate: Thu Mar 16 21:09:53 2023 +0100
Commit: Corinna Vinschen <corinna@vinschen.de>
CommitDate: Mon Mar 20 12:58:03 2023 +0100
Cygwin: regex: fix faulty check for valid range expression
Except for the "C" or "POSIX" locale, checking for start <= finish
is always wrong. Range start must be <= range finish in terms of the
locale's collating order. So make sure to call always wcscoll(), even
in the "C"/"POSIX" locale, which makes wcscoll equivalent to wcscmp
anyway.
Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
Diff:
---
winsup/cygwin/regex/regcomp.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/winsup/cygwin/regex/regcomp.c b/winsup/cygwin/regex/regcomp.c
index 418e24a90ad2..7899ae7fce3c 100644
--- a/winsup/cygwin/regex/regcomp.c
+++ b/winsup/cygwin/regex/regcomp.c
@@ -1145,7 +1145,7 @@ p_b_term(struct parse *p, cset *cs)
#else
if (MB_CUR_MAX > 1) {
#endif
- (void)REQUIRE(start <= finish, REG_ERANGE);
+ (void)REQUIRE(p_range_cmp(start, finish) <= 0, REG_ERANGE);
CHaddrange(p, cs, start, finish);
} else {
(void)REQUIRE(p_range_cmp(start, finish) <= 0, REG_ERANGE);
@@ -1665,8 +1665,6 @@ CHaddrange(struct parse *p, cset *cs, wint_t min, wint_t max)
for (; min < NC && min <= max; min++)
CHadd(p, cs, min);
- if (min >= max)
- return;
newranges = reallocarray(cs->ranges, cs->nranges + 1,
sizeof(*cs->ranges));
if (newranges == NULL) {
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