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* [glibc] LC_COLLATE: Fix last character ellipsis handling (Bug 22668)
@ 2021-04-26 12:38 Carlos O'Donell
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From: Carlos O'Donell @ 2021-04-26 12:38 UTC (permalink / raw)
To: glibc-cvs
https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=82292c99b2b68504e0b09b19a339d0232c2e1eaa
commit 82292c99b2b68504e0b09b19a339d0232c2e1eaa
Author: Hanataka Shinya <hanataka.shinya@gmail.com>
Date: Wed Feb 17 23:00:48 2021 -0500
LC_COLLATE: Fix last character ellipsis handling (Bug 22668)
During ellipsis processing the collation cursor was not correctly
moved to the end of the ellipsis after processing.
The code inserted the new entry after the cursor, but before the
real end of the ellipsis:
[cursor]
... element_t <-> element_t <-> element_t <-> element_t
"<U0000>" "<U0001>" "<U007F>"
startp endp
At the end of the function we have:
[cursor]
... element_t <-> element_t <-> element_t
"<U007E>" "<U007F>"
endp
The cursor should be pointing at endp, the last element in the
doubly-linked list, otherwise when execution returns to the
caller we will start inserting the next line after <U007E>.
Subsequent operations end up unlinking the ellipsis end entry or
just leaving it in the list dangling from the end. This kind of
dangling is immediately visible in C.UTF-8 with the following
sorting from strcoll:
<U0010FFFF>
<U0000FFFF>
<U000007FF>
<U0000007F>
With the cursor correctly adjusted the end entry is correctly given
the right location and thus the right weight.
Retested and no regressions on x86_64 and i686.
Co-authored-by: Carlos O'Donell <carlos@redhat.com>
Diff:
---
locale/programs/ld-collate.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/locale/programs/ld-collate.c b/locale/programs/ld-collate.c
index 0af21e05e2..b6406b775d 100644
--- a/locale/programs/ld-collate.c
+++ b/locale/programs/ld-collate.c
@@ -1483,6 +1483,9 @@ order for `%.*s' already defined at %s:%Zu"),
}
}
}
+ /* Move the cursor to the last entry in the ellipsis.
+ Subsequent operations need to start from the last entry. */
+ collate->cursor = endp;
}
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2021-04-26 12:38 [glibc] LC_COLLATE: Fix last character ellipsis handling (Bug 22668) Carlos O'Donell
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