vi: stored search pattern applies to ':s'

The same stored search pattern applies to both search ('/') and
search/replace (':s') operations.

A search/replace operation with an empty "find" string (':s//abc/')
should use the last stored search pattern, if available, and issue an
error message if there is none.

If the "find" string is not empty it should replace the stored search
pattern.

function                                             old     new   delta
colon                                               3952    4024     +72
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/0 up/down: 72/0)               Total: 72 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 12 insertions, 0 deletions

diff --git a/editors/vi.c b/editors/vi.c
index 38ce1fdf0..f0bbc9518 100644
--- a/editors/vi.c
+++ b/editors/vi.c
@@ -3100,6 +3100,18 @@ static void colon(char *buf)
                 }
                 len_R = strlen(R);
 
+                if (len_F) {    // save "find" as last search pattern
+                        free(last_search_pattern);
+                        last_search_pattern = xstrdup(F - 1);
+                        last_search_pattern[0] = '/';
+                } else if (last_search_pattern[1] == '\0') {
+                        status_line_bold("No previous search");
+                        goto ret;
+                } else {
+                        F = last_search_pattern + 1;
+                        len_F = strlen(F);
+                }
+
                 if (e < 0) {    // no addr given
                         q = begin_line(dot);      // start with cur line
                         r = end_line(dot);