emo/busybox
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

vi: code shrink motion by paragraph

Browse Source 
Use a hand-coded loop to search for paragraph boundaries instead
of calling char_search().  We were using a loop anyway to skip
consecutive newlines.

function                                             old     new   delta
do_cmd                                              4792    4752     -40
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-40)             Total: -40 bytes

Signed-off-by: Ron Yorston <rmy@pobox.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
This commit is contained in:
Ron Yorston 2021-04-15 12:02:11 +01:00 committed by Denys Vlasenko
parent d9d19896a9
commit 033fa3d5c6
1 changed files with 15 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
editors/vi.c
View File

@ -3636,21 +3636,24 @@ static void do_cmd(int c)
break;
case '{': // {- move backward paragraph
case '}': // }- move forward paragraph
dir = c == '}' ? FORWARD : BACK;
do {
dir = c == '}' ? FORWARD : BACK;
// skip over consecutive empty lines
while ((dir == FORWARD ? dot < end - 1 : dot > text) &&
*dot == '\n' && dot[dir] == '\n') {
int skip = TRUE; // initially skip consecutive empty lines
while (dir == FORWARD ? dot < end - 1 : dot > text) {
if (*dot == '\n' && dot[dir] == '\n') {
if (!skip) {
if (dir == FORWARD)
++dot; // move to next blank line
goto dc2;
}
}
else {
skip = FALSE;
}
dot += dir;
}
q = char_search(dot, "\n\n", ((unsigned)dir << 1) | FULL);
if (q != NULL) { // found blank line
dot = next_line(q); // move to next blank line
}
else { // blank line not found, move to end of file
dot = dir == FORWARD ? end - 1 : text;
break;
}
goto dc6; // end of file
dc2: continue;
} while (--cmdcnt > 0);
break;
#endif /* FEATURE_VI_SEARCH */