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patch 8.2.2820: session file may divide by zero

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Problem:    Session file may divide by zero.
Solution:   Avoid writing difide by zero. (closes #8162)
This commit is contained in:
Bram Moolenaar
2021-04-30 21:37:51 +02:00
parent 4934ed34c3
commit b6c2e9a010
3 changed files with 27 additions and 3 deletions
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14
src/session.c
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@ -456,11 +456,19 @@ put_view(
// Restore the cursor line in the file and relatively in the
// window. Don't use "G", it changes the jumplist.
if (fprintf(fd, "let s:l = %ld - ((%ld * winheight(0) + %ld) / %ld)",
if (wp->w_height <= 0)
{
if (fprintf(fd, "let s:l = %ld", (long)wp->w_cursor.lnum) < 0)
return FAIL;
}
else if (fprintf(fd,
"let s:l = %ld - ((%ld * winheight(0) + %ld) / %ld)",
(long)wp->w_cursor.lnum,
(long)(wp->w_cursor.lnum - wp->w_topline),
(long)wp->w_height / 2, (long)wp->w_height) < 0
|| put_eol(fd) == FAIL
(long)wp->w_height / 2, (long)wp->w_height) < 0)
return FAIL;
if (put_eol(fd) == FAIL
|| put_line(fd, "if s:l < 1 | let s:l = 1 | endif") == FAIL
|| put_line(fd, "keepjumps exe s:l") == FAIL
|| put_line(fd, "normal! zt") == FAIL