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Optimize bash cursor position translation.

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the previous algorithm was O(n^2).

Signed-off-by: Andrew Borodin <aborodin@vmail.ru>
This commit is contained in:
Oswald Buddenhagen 2020-10-08 13:26:17 +02:00 committed by Andrew Borodin
parent 563632819d
commit b680f8198d
1 changed files with 7 additions and 4 deletions
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11
src/subshell/common.c
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@ -633,10 +633,13 @@ read_command_line_buffer (gboolean test_mode)
{
/* We need to do this because bash gives the cursor position in a utf-8 string based
* on the location in bytes, not in unicode characters. */
for (i = 0; i < command_buffer_length; i++)
if (str_offset_to_pos (subshell_command_buffer, i) == cursor_position)
break;
cursor_position = i;
char *curr, *stop;
curr = subshell_command_buffer;
stop = curr + cursor_position;
for (cursor_position = 0; curr < stop; cursor_position++)
str_next_char_safe (&curr);
}
if (cursor_position > command_buffer_length)
cursor_position = command_buffer_length;