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File completion: fix incomplete multibyte support

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Upon encountering two filenames with multibyte characters starting
with the same byte, a partial multibyte character was completed.

Reproducer (to run in UTF-8 locale):
$ touch XXXá XXXë
$ : XX		<== pres tab
$ : XXX^?	<== partial multibyte character appears

Note: á is $'\xc3\xa1' and ë is $'\xc3\xab' (same initial byte).

src/cmd/ksh93/edit/completion.c:
- Add multibyte support to the charcmp() and overlaid() functions.
  Thanks to Harald van Dijk for useful code and suggestions.
- Add a few missing mbinit() calls. The state of multibyte
  processing must be reset before starting a new loop in case a
  previous processing run was interrupted mid-character.

src/cmd/ksh93/tests/pty.sh:
- Add test based on Harald's reproducer.

Resolves: https://github.com/ksh93/ksh/issues/223
This commit is contained in:
Martijn Dekker 2021-03-17 22:34:45 +00:00
parent 936a1939a8
commit 33d0f004de
4 changed files with 37 additions and 5 deletions
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2
src/cmd/ksh93/include/version.h
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@ -20,7 +20,7 @@
#define SH_RELEASE_FORK "93u+m" /* only change if you develop a new ksh93 fork */
#define SH_RELEASE_SVER "1.0.0-alpha" /* semantic version number: https://semver.org */
#define SH_RELEASE_DATE "2021-03-16" /* must be in this format for $((.sh.version)) */
#define SH_RELEASE_DATE "2021-03-17" /* must be in this format for $((.sh.version)) */
#define SH_RELEASE_CPYR "(c) 2020-2021 Contributors to ksh " SH_RELEASE_FORK
/* Scripts sometimes field-split ${.sh.version}, so don't change amount of whitespace. */