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/* Simple Plugin API
*
* Copyright © 2018 Wim Taymans
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef SPA_POD_COMPARE_H
#define SPA_POD_COMPARE_H
#ifdef __cplusplus
extern "C" {
#endif
#include <stdarg.h>
#include <errno.h>
#include <stdint.h>
#include <stddef.h>
#include <stdio.h>
#include <string.h>
#include <spa/param/props.h>
#include <spa/pod/iter.h>
#include <spa/pod/builder.h>
/**
* \addtogroup spa_pod
* \{
*/
static inline int spa_pod_compare_value(uint32_t type, const void *r1, const void *r2, uint32_t size)
{
switch (type) {
case SPA_TYPE_None:
return 0;
case SPA_TYPE_Bool:
case SPA_TYPE_Id:
return *(uint32_t *) r1 == *(uint32_t *) r2 ? 0 : 1;
case SPA_TYPE_Int:
return *(int32_t *) r1 - *(int32_t *) r2;
case SPA_TYPE_Long:
return *(int64_t *) r1 - *(int64_t *) r2;
case SPA_TYPE_Float:
return *(float *) r1 - *(float *) r2;
case SPA_TYPE_Double:
return *(double *) r1 - *(double *) r2;
case SPA_TYPE_String:
return strcmp((char *)r1, (char *)r2);
case SPA_TYPE_Bytes:
return memcmp((char *)r1, (char *)r2, size);
case SPA_TYPE_Rectangle:
{
const struct spa_rectangle *rec1 = (struct spa_rectangle *) r1,
*rec2 = (struct spa_rectangle *) r2;
if (rec1->width == rec2->width && rec1->height == rec2->height)
return 0;
else if (rec1->width < rec2->width || rec1->height < rec2->height)
return -1;
else
return 1;
}
case SPA_TYPE_Fraction:
{
const struct spa_fraction *f1 = (struct spa_fraction *) r1,
*f2 = (struct spa_fraction *) r2;
int64_t n1, n2;
n1 = ((int64_t) f1->num) * f2->denom;
n2 = ((int64_t) f2->num) * f1->denom;
if (n1 < n2)
return -1;
else if (n1 > n2)
return 1;
else
return 0;
}
default:
break;
}
return 0;
}
static inline int spa_pod_compare(const struct spa_pod *pod1,
const struct spa_pod *pod2)
{
int res = 0;
uint32_t n_vals1, n_vals2;
uint32_t choice1, choice2;
spa_return_val_if_fail(pod1 != NULL, -EINVAL);
spa_return_val_if_fail(pod2 != NULL, -EINVAL);
pod1 = spa_pod_get_values(pod1, &n_vals1, &choice1);
pod2 = spa_pod_get_values(pod2, &n_vals2, &choice2);
if (n_vals1 != n_vals2)
return -EINVAL;
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 = (const struct spa_pod*)SPA_POD_BODY_CONST(pod1);
p1s = SPA_POD_BODY_SIZE(pod1);
p2 = (const struct spa_pod*)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 = (const struct spa_pod*)spa_pod_next(p1);
p2 = (const struct spa_pod*)spa_pod_next(p2);
}
break;
}
case SPA_TYPE_Object:
{
const struct spa_pod_prop *p1, *p2;
const struct spa_pod_object *o1, *o2;
o1 = (const struct spa_pod_object*)pod1;
o2 = (const struct spa_pod_object*)pod2;
p2 = NULL;
SPA_POD_OBJECT_FOREACH(o1, p1) {
if ((p2 = spa_pod_object_find_prop(o2, p2, p1->key)) == NULL)
return 1;
if ((res = spa_pod_compare(&p1->value, &p2->value)) != 0)
return res;
}
p1 = NULL;
SPA_POD_OBJECT_FOREACH(o2, p2) {
if ((p1 = spa_pod_object_find_prop(o1, p1, 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:
if (SPA_POD_BODY_SIZE(pod1) != SPA_POD_BODY_SIZE(pod2))
return -EINVAL;
res = spa_pod_compare_value(SPA_POD_TYPE(pod1),
SPA_POD_BODY(pod1), SPA_POD_BODY(pod2),
SPA_POD_BODY_SIZE(pod1));
break;
}
return res;
}
/**
* \}
*/
#ifdef __cplusplus
}
#endif
#endif
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