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Fix warnings: fold.c: get_foldtext(): Np dereference: FP.

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Problem    : Dereference of null pointer @ 1701.
Diagnostic : False positive.
Rationale  : Comparison `last_wp != wp` just after initializing
             `last_wp` to NULL makes the compiler think `wp` can be
             null. Error appears then on codepath assuming comparison is
             false (i.e. `wp` is null).
Resolution : Change order of OR clauses.
             That seems not to give motives for the analyzer to check
             the `wp` null path and removes the warning.
             But potential null dereference is still there, so we add
             the nonnull annotation to `wp` parameter.
This commit is contained in:
Eliseo Martínez
2014-11-09 09:33:48 +01:00
parent d6472f459b
commit 1002e3fe1d
1 changed files with 5 additions and 3 deletions
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8
src/nvim/fold.c
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@@ -22,6 +22,7 @@
#include "nvim/diff.h"
#include "nvim/eval.h"
#include "nvim/ex_docmd.h"
#include "nvim/func_attr.h"
#include "nvim/indent.h"
#include "nvim/mark.h"
#include "nvim/memline.h"
@@ -1680,7 +1681,9 @@ static void foldDelMarker(linenr_T lnum, char_u *marker, int markerlen)
* When 'foldtext' isn't set puts the result in "buf[51]". Otherwise the
* result is in allocated memory.
*/
char_u *get_foldtext(win_T *wp, linenr_T lnum, linenr_T lnume, foldinfo_T *foldinfo, char_u *buf)
char_u *get_foldtext(win_T *wp, linenr_T lnum, linenr_T lnume,
foldinfo_T *foldinfo, char_u *buf)
FUNC_ATTR_NONNULL_ARG(1)
{
char_u *text = NULL;
/* an error occurred when evaluating 'fdt' setting */
@@ -1689,8 +1692,7 @@ char_u *get_foldtext(win_T *wp, linenr_T lnum, linenr_T lnume, foldinfo_T *foldi
static win_T *last_wp = NULL;
static linenr_T last_lnum = 0;
if (last_wp != wp || last_wp == NULL
|| last_lnum > lnum || last_lnum == 0)
if (last_wp == NULL || last_wp != wp || last_lnum > lnum || last_lnum == 0)
/* window changed, try evaluating foldtext setting once again */
got_fdt_error = FALSE;