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patch 8.0.0542: getpos() can return a negative line number

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Problem:    getpos() can return a negative line number. (haya14busa)
Solution:   Handle a zero topline and botline. (closes #1613)
This commit is contained in:
Bram Moolenaar
2017-04-03 22:02:55 +02:00
parent 04000560ca
commit a1d5fa65bc
3 changed files with 11 additions and 4 deletions
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6
runtime/doc/eval.txt
View File

@@ -5413,8 +5413,10 @@ line({expr}) The result is a Number, which is the line number of the file
$ the last line in the current buffer
'x position of mark x (if the mark is not set, 0 is
returned)
w0 first line visible in current window
w$ last line visible in current window
w0 first line visible in current window (one if the
display isn't updated, e.g. in silent Ex mode)
w$ last line visible in current window (this is one
less than "w0" if no lines are visible)
v In Visual mode: the start of the Visual area (the
cursor is the end). When not in Visual mode
returns the cursor position. Differs from |'<| in

7
src/eval.c
View File

@@ -6120,13 +6120,16 @@ var2fpos(
if (name[1] == '0') /* "w0": first visible line */
{
update_topline();
pos.lnum = curwin->w_topline;
/* In silent Ex mode topline is zero, but that's not a valid line
* number; use one instead. */
pos.lnum = curwin->w_topline > 0 ? curwin->w_topline : 1;
return &pos;
}
else if (name[1] == '$') /* "w$": last visible line */
{
validate_botline();
pos.lnum = curwin->w_botline - 1;
/* In silent Ex mode botline is zero, return zero then. */
pos.lnum = curwin->w_botline > 0 ? curwin->w_botline - 1 : 0;
return &pos;
}
}

2
src/version.c
View File

@@ -764,6 +764,8 @@ static char *(features[]) =
static int included_patches[] =
{ /* Add new patch number below this line */
/**/
542,
/**/
541,
/**/