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authorRon Yorston2021-06-21 11:30:39 +0100
committerDenys Vlasenko2021-06-21 15:37:28 +0200
commit51358757c709f9c489aa6b13b34141edf84183fa (patch)
treea1649e684229819cd5bab9a0ed0f195adb737957 /miscutils
parentac4786ba002620eb4c046c847e69d6a12ea0e322 (diff)
downloadbusybox-51358757c709f9c489aa6b13b34141edf84183fa.zip
busybox-51358757c709f9c489aa6b13b34141edf84183fa.tar.gz
vi: fix backward search with GNU regex
With FEATURE_VI_REGEX_SEARCH enabled backward searches don't work. This is problematic on distros that enable regexes, such as Tiny Core Linux and Fedora. When calling GNU re_search() with a negative range parameter (indicating a backward search) the start offset must be set to the end of the area being searched. The return value of re_search() is the offset of the matched pattern from the start of the area being searched. For a successful search (positive return value) char_search() can return the pointer to the start of the area plus the offset. FEATURE_VI_REGEX_SEARCH isn't enabled by default but when it is: function old new delta char_search 256 247 -9 ------------------------------------------------------------------------------ (add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-9) Total: -9 bytes Signed-off-by: Andrey Dobrovolsky <andrey.dobrovolsky.odessa@gmail.com> Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'miscutils')
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