vi: use basic regular expressions for search

Both traditional vi and vim use basic regular expressions for
search.  Also, they don't allow matches to extend across line
endings.  Thus with the file:

   123
   234

the search '/2.*4$' should find the second '2', not the first.

Make BusyBox vi do the same.

Whether or not VI_REGEX_SEARCH is enabled:

function                                             old     new   delta
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/0 up/down: 0/0)                 Total: 0 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>

1 files changed, 2 insertions, 2 deletions

diff --git a/editors/vi.c b/editors/vi.c
index 22b8f7cf1..34d577e90 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -2378,9 +2378,9 @@ static char *char_search(char *p, const char *pat, int dir_and_range)
         char *q;
         int i, size, range, start;
 
-        re_syntax_options = RE_SYNTAX_POSIX_EXTENDED;
+        re_syntax_options = RE_SYNTAX_POSIX_BASIC & (~RE_DOT_NEWLINE);
         if (ignorecase)
-                re_syntax_options = RE_SYNTAX_POSIX_EXTENDED | RE_ICASE;
+                re_syntax_options |= RE_ICASE;
 
         memset(&preg, 0, sizeof(preg));
         err = re_compile_pattern(pat, strlen(pat), &preg);