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wmaker: converted macro 'SAME' into a static function

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There are some risks associated with the way arguments are used in macros,
and using a function also allows check on the type of arguments and leaves
more room to the compiler for making the best optimisation choice; it also
allows writing easier to read code (and thus, to maintain).

As a side effect, this should also help Coverity in avoiding false positive
bug reports (like #109605 and #109607).

Signed-off-by: Christophe CURIS <christophe.curis@free.fr>
This commit is contained in:
Christophe CURIS
2015-04-25 12:44:29 +02:00
committed by Carlos R. Mafra
parent 6ef343ed87
commit c8ea949b1a
2 changed files with 33 additions and 6 deletions
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19
src/window.c
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@@ -2621,7 +2621,19 @@ WMagicNumber wWindowAddSavedState(const char *instance, const char *class,
return wstate;
}
#define SAME(x, y) (((x) && (y) && !strcmp((x), (y))) || (!(x) && !(y)))
static inline int is_same(const char *x, const char *y)
{
if ((x == NULL) && (y == NULL))
return 1;
if ((x == NULL) || (y == NULL))
return 0;
if (strcmp(x, y) == 0)
return 1;
else
return 0;
}
WMagicNumber wWindowGetSavedState(Window win)
{
@@ -2637,8 +2649,9 @@ WMagicNumber wWindowGetSavedState(Window win)
if (PropGetWMClass(win, &class, &instance)) {
while (wstate) {
if (SAME(instance, wstate->instance) &&
SAME(class, wstate->class) && SAME(command, wstate->command)) {
if (is_same(instance, wstate->instance) &&
is_same(class, wstate->class) &&
is_same(command, wstate->command)) {
break;
}
wstate = wstate->next;