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patch 7.4.2326

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Problem:    Illegal memory access when Visual selection starts in invalid
            position. (Dominique Pelle)
Solution:   Correct position when needed.
This commit is contained in:
Bram Moolenaar
2016-09-04 20:35:01 +02:00
parent 30180b8dad
commit d5824ce1b5
4 changed files with 28 additions and 0 deletions
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22
src/misc2.c
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@@ -504,6 +504,28 @@ get_cursor_rel_lnum(
return retval;
}
/*
* Make sure "pos.lnum" and "pos.col" are valid in "buf".
* This allows for the col to be on the NUL byte.
*/
void
check_pos(buf_T *buf, pos_T *pos)
{
char_u *line;
colnr_T len;
if (pos->lnum > buf->b_ml.ml_line_count)
pos->lnum = buf->b_ml.ml_line_count;
if (pos->col > 0)
{
line = ml_get_buf(buf, pos->lnum, FALSE);
len = (colnr_T)STRLEN(line);
if (pos->col > len)
pos->col = len;
}
}
/*
* Make sure curwin->w_cursor.lnum is valid.
*/