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compare: fix pod compare

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This commit is contained in:
Wim Taymans 2018-09-17 21:51:58 +02:00
parent 96a84d09df
commit 1ea3d5c474
2 changed files with 69 additions and 59 deletions
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114
spa/include/spa/pod/compare.h
View file

@ -76,67 +76,67 @@ static inline int spa_pod_compare_value(uint32_t type, const void *r1, const voi
return 0;
}
static inline int spa_pod_compare_part(const struct spa_pod *pod1, uint32_t pod1_size,
const struct spa_pod *pod2, uint32_t pod2_size)
{
const struct spa_pod *p1, *p2;
int res;
p2 = pod2;
SPA_POD_FOREACH(pod1, pod1_size, p1) {
bool do_advance = true;
uint32_t recurse_offset = 0;
if (p2 == NULL)
return -EINVAL;
switch (SPA_POD_TYPE(p1)) {
case SPA_TYPE_Struct:
case SPA_TYPE_Object:
if (SPA_POD_TYPE(p2) != SPA_POD_TYPE(p1))
return -EINVAL;
if (SPA_POD_TYPE(p1) == SPA_TYPE_Struct)
recurse_offset = sizeof(struct spa_pod_struct);
else
recurse_offset = sizeof(struct spa_pod_object);
do_advance = true;
break;
default:
if (SPA_POD_TYPE(p1) != SPA_POD_TYPE(p2))
return -EINVAL;
res = spa_pod_compare_value(SPA_POD_TYPE(p1), SPA_POD_BODY(p1), SPA_POD_BODY(p2));
do_advance = true;
break;
}
if (recurse_offset) {
res = spa_pod_compare_part(SPA_MEMBER(p1,recurse_offset,void),
SPA_POD_SIZE(p1) - recurse_offset,
SPA_MEMBER(p2,recurse_offset,void),
SPA_POD_SIZE(p2) - recurse_offset);
}
if (do_advance) {
p2 = spa_pod_next(p2);
if (!spa_pod_is_inside(pod2, pod2_size, p2))
p2 = NULL;
}
if (res != 0)
return res;
}
if (p2 != NULL)
return -EINVAL;
return 0;
}
static inline int spa_pod_compare(const struct spa_pod *pod1,
const struct spa_pod *pod2)
{
int res = 0;
spa_return_val_if_fail(pod1 != NULL, -EINVAL);
spa_return_val_if_fail(pod2 != NULL, -EINVAL);
return spa_pod_compare_part(pod1, SPA_POD_SIZE(pod1), pod2, SPA_POD_SIZE(pod2));
if (SPA_POD_TYPE(pod1) != SPA_POD_TYPE(pod2))
return -EINVAL;
switch (SPA_POD_TYPE(pod1)) {
case SPA_TYPE_Struct:
{
const struct spa_pod *p1, *p2;
size_t p1s, p2s;
p1 = SPA_POD_BODY_CONST(pod1);
p1s = SPA_POD_BODY_SIZE(pod1);
p2 = SPA_POD_BODY_CONST(pod2);
p2s = SPA_POD_BODY_SIZE(pod2);
while (true) {
if (!spa_pod_is_inside(pod1, p1s, p1) ||
!spa_pod_is_inside(pod2, p2s, p2))
return -EINVAL;
if ((res = spa_pod_compare(p1, p2)) != 0)
return res;
p1 = spa_pod_next(p1);
p2 = spa_pod_next(p2);
}
break;
}
case SPA_TYPE_Object:
{
const struct spa_pod_prop *p1, *p2;
SPA_POD_OBJECT_FOREACH((const struct spa_pod_object*)pod1, p1) {
if ((p2 = spa_pod_find_prop(pod2, p1->key)) == NULL)
return 1;
if ((res == spa_pod_compare(&p1->value, &p2->value)) != 0)
return res;
}
SPA_POD_OBJECT_FOREACH((const struct spa_pod_object*)pod2, p2) {
if ((p1 = spa_pod_find_prop(pod1, p2->key)) == NULL)
return -1;
}
break;
}
case SPA_TYPE_Array:
{
if (SPA_POD_BODY_SIZE(pod1) != SPA_POD_BODY_SIZE(pod2))
return -EINVAL;
res = memcmp(SPA_POD_BODY(pod1), SPA_POD_BODY(pod2), SPA_POD_BODY_SIZE(pod2));
break;
}
default:
res = spa_pod_compare_value(SPA_POD_TYPE(pod1), SPA_POD_BODY(pod1), SPA_POD_BODY(pod2));
break;
}
return res;
}

14
spa/include/spa/pod/iter.h
View file

@ -69,11 +69,21 @@ static inline void *spa_pod_next(const void *iter)
return SPA_MEMBER(iter, SPA_ROUND_UP_N (SPA_POD_SIZE (iter), 8), void);
}
static inline struct spa_pod_prop *spa_pod_prop_first(const struct spa_pod_object_body *body)
{
return SPA_MEMBER(body, sizeof(struct spa_pod_object_body), struct spa_pod_prop);
}
static inline struct spa_pod_prop *spa_pod_prop_next(const struct spa_pod_prop *iter)
{
return SPA_MEMBER(iter, SPA_ROUND_UP_N (SPA_POD_PROP_SIZE (iter), 8), struct spa_pod_prop);
}
static inline struct spa_pod_control *spa_pod_control_first(const struct spa_pod_sequence_body *body)
{
return SPA_MEMBER(body, sizeof(struct spa_pod_sequence_body), struct spa_pod_control);
}
static inline struct spa_pod_control *spa_pod_control_next(const struct spa_pod_control *iter)
{
return SPA_MEMBER(iter, SPA_ROUND_UP_N (SPA_POD_CONTROL_SIZE (iter), 8), struct spa_pod_control);
@ -98,7 +108,7 @@ static inline struct spa_pod_control *spa_pod_control_next(const struct spa_pod_
SPA_POD_FOREACH(SPA_POD_BODY(obj), SPA_POD_BODY_SIZE(obj), iter)
#define SPA_POD_OBJECT_BODY_FOREACH(body, size, iter) \
for ((iter) = SPA_MEMBER((body), sizeof(struct spa_pod_object_body), struct spa_pod_prop); \
for ((iter) = spa_pod_prop_first(body); \
spa_pod_is_inside(body, size, iter); \
(iter) = spa_pod_prop_next(iter))
@ -106,7 +116,7 @@ static inline struct spa_pod_control *spa_pod_control_next(const struct spa_pod_
SPA_POD_OBJECT_BODY_FOREACH(&(obj)->body, SPA_POD_BODY_SIZE(obj), iter)
#define SPA_POD_SEQUENCE_BODY_FOREACH(body, size, iter) \
for ((iter) = SPA_MEMBER((body), sizeof(struct spa_pod_sequence_body), struct spa_pod_control); \
for ((iter) = spa_pod_control_first(body); \
spa_pod_is_inside(body, size, iter); \
(iter) = spa_pod_control_next(iter))