PipeWire  1.4.3
compare.h
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1 /* Simple Plugin API */
2 /* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
3 /* SPDX-License-Identifier: MIT */
4 
5 #ifndef SPA_POD_COMPARE_H
6 #define SPA_POD_COMPARE_H
7 
8 #ifdef __cplusplus
9 extern "C" {
10 #endif
11 
12 #include <stdarg.h>
13 #include <errno.h>
14 #include <stdint.h>
15 #include <stddef.h>
16 #include <stdio.h>
17 #include <string.h>
18 
19 #include <spa/param/props.h>
20 #include <spa/pod/iter.h>
21 #include <spa/pod/builder.h>
22 
23 #ifndef SPA_API_POD_COMPARE
24  #ifdef SPA_API_IMPL
25  #define SPA_API_POD_COMPARE SPA_API_IMPL
26  #else
27  #define SPA_API_POD_COMPARE static inline
28  #endif
29 #endif
30 
36 SPA_API_POD_COMPARE int spa_pod_compare_value(uint32_t type, const void *r1, const void *r2, uint32_t size)
37 {
38  switch (type) {
39  case SPA_TYPE_None:
40  return 0;
41  case SPA_TYPE_Bool:
42  return SPA_CMP(!!*(int32_t *)r1, !!*(int32_t *)r2);
44  return SPA_CMP(*(uint32_t *)r1, *(uint32_t *)r2);
45  case SPA_TYPE_Int:
46  return SPA_CMP(*(int32_t *)r1, *(int32_t *)r2);
47  case SPA_TYPE_Long:
48  return SPA_CMP(*(int64_t *)r1, *(int64_t *)r2);
49  case SPA_TYPE_Float:
50  return SPA_CMP(*(float *)r1, *(float *)r2);
51  case SPA_TYPE_Double:
52  return SPA_CMP(*(double *)r1, *(double *)r2);
53  case SPA_TYPE_String:
54  return strcmp((char *)r1, (char *)r2);
55  case SPA_TYPE_Bytes:
56  return memcmp((char *)r1, (char *)r2, size);
57  case SPA_TYPE_Rectangle:
58  {
59  const struct spa_rectangle *rec1 = (struct spa_rectangle *) r1,
60  *rec2 = (struct spa_rectangle *) r2;
61  if (rec1->width == rec2->width && rec1->height == rec2->height)
62  return 0;
63  else if (rec1->width < rec2->width || rec1->height < rec2->height)
64  return -1;
65  else
66  return 1;
67  }
68  case SPA_TYPE_Fraction:
69  {
70  const struct spa_fraction *f1 = (struct spa_fraction *) r1,
71  *f2 = (struct spa_fraction *) r2;
72  uint64_t n1, n2;
73  n1 = ((uint64_t) f1->num) * f2->denom;
74  n2 = ((uint64_t) f2->num) * f1->denom;
75  return SPA_CMP(n1, n2);
76  }
77  default:
78  break;
79  }
80  return 0;
81 }
82 
83 SPA_API_POD_COMPARE int spa_pod_compare(const struct spa_pod *pod1,
84  const struct spa_pod *pod2)
85 {
86  int res = 0;
87  uint32_t n_vals1, n_vals2;
88  uint32_t choice1, choice2;
89 
90  spa_return_val_if_fail(pod1 != NULL, -EINVAL);
91  spa_return_val_if_fail(pod2 != NULL, -EINVAL);
92 
93  pod1 = spa_pod_get_values(pod1, &n_vals1, &choice1);
94  pod2 = spa_pod_get_values(pod2, &n_vals2, &choice2);
95 
96  if (n_vals1 != n_vals2)
97  return -EINVAL;
98 
99  if (SPA_POD_TYPE(pod1) != SPA_POD_TYPE(pod2))
100  return -EINVAL;
101 
102  switch (SPA_POD_TYPE(pod1)) {
103  case SPA_TYPE_Struct:
104  {
105  const struct spa_pod *p1, *p2;
106  size_t p1s, p2s;
107 
108  p1 = (const struct spa_pod*)SPA_POD_BODY_CONST(pod1);
109  p1s = SPA_POD_BODY_SIZE(pod1);
110  p2 = (const struct spa_pod*)SPA_POD_BODY_CONST(pod2);
111  p2s = SPA_POD_BODY_SIZE(pod2);
112 
113  while (true) {
114  if (!spa_pod_is_inside(pod1, p1s, p1) ||
115  !spa_pod_is_inside(pod2, p2s, p2))
116  return -EINVAL;
117 
118  if ((res = spa_pod_compare(p1, p2)) != 0)
119  return res;
120 
121  p1 = (const struct spa_pod*)spa_pod_next(p1);
122  p2 = (const struct spa_pod*)spa_pod_next(p2);
123  }
124  break;
125  }
126  case SPA_TYPE_Object:
127  {
128  const struct spa_pod_prop *p1, *p2;
129  const struct spa_pod_object *o1, *o2;
130 
131  o1 = (const struct spa_pod_object*)pod1;
132  o2 = (const struct spa_pod_object*)pod2;
133 
134  p2 = NULL;
135  SPA_POD_OBJECT_FOREACH(o1, p1) {
136  if ((p2 = spa_pod_object_find_prop(o2, p2, p1->key)) == NULL)
137  return 1;
138  if ((res = spa_pod_compare(&p1->value, &p2->value)) != 0)
139  return res;
140  }
141  p1 = NULL;
142  SPA_POD_OBJECT_FOREACH(o2, p2) {
143  if ((p1 = spa_pod_object_find_prop(o1, p1, p2->key)) == NULL)
144  return -1;
145  }
146  break;
147  }
148  case SPA_TYPE_Array:
149  {
150  if (SPA_POD_BODY_SIZE(pod1) != SPA_POD_BODY_SIZE(pod2))
151  return -EINVAL;
152  res = memcmp(SPA_POD_BODY(pod1), SPA_POD_BODY(pod2), SPA_POD_BODY_SIZE(pod2));
153  break;
154  }
155  default:
156  if (SPA_POD_BODY_SIZE(pod1) != SPA_POD_BODY_SIZE(pod2))
157  return -EINVAL;
159  SPA_POD_BODY(pod1), SPA_POD_BODY(pod2),
160  SPA_POD_BODY_SIZE(pod1));
161  break;
162  }
163  return res;
164 }
165 
170 #ifdef __cplusplus
171 }
172 #endif
173 
174 #endif
spa/pod/builder.h
#define SPA_API_POD_COMPARE
Definition: compare.h:34
uint32_t int int res
Definition: core.h:433
#define SPA_POD_BODY_CONST(pod)
Definition: pod.h:41
SPA_API_POD_COMPARE int spa_pod_compare(const struct spa_pod *pod1, const struct spa_pod *pod2)
Definition: compare.h:90
SPA_API_POD_ITER void * spa_pod_next(const void *iter)
Definition: iter.h:52
SPA_API_POD_ITER struct spa_pod * spa_pod_get_values(const struct spa_pod *pod, uint32_t *n_vals, uint32_t *choice)
Definition: iter.h:363
SPA_API_POD_COMPARE int spa_pod_compare_value(uint32_t type, const void *r1, const void *r2, uint32_t size)
Definition: compare.h:43
#define SPA_POD_OBJECT_FOREACH(obj, iter)
Definition: iter.h:124
#define SPA_POD_BODY(pod)
Definition: pod.h:39
#define SPA_POD_TYPE(pod)
Definition: pod.h:28
SPA_API_POD_ITER const struct spa_pod_prop * spa_pod_object_find_prop(const struct spa_pod_object *pod, const struct spa_pod_prop *start, uint32_t key)
Definition: iter.h:404
#define SPA_POD_BODY_SIZE(pod)
Definition: pod.h:26
SPA_API_POD_ITER bool spa_pod_is_inside(const void *pod, uint32_t size, const void *iter)
Definition: iter.h:44
@ SPA_TYPE_Int
Definition: type.h:45
@ SPA_TYPE_Rectangle
Definition: type.h:51
@ SPA_TYPE_Long
Definition: type.h:46
@ SPA_TYPE_Bool
Definition: type.h:43
@ SPA_TYPE_Bytes
Definition: type.h:50
@ SPA_TYPE_Object
Definition: type.h:56
@ SPA_TYPE_Float
Definition: type.h:47
@ SPA_TYPE_Fraction
Definition: type.h:52
@ SPA_TYPE_None
Definition: type.h:42
@ SPA_TYPE_Double
Definition: type.h:48
@ SPA_TYPE_Id
Definition: type.h:44
@ SPA_TYPE_Array
Definition: type.h:54
@ SPA_TYPE_String
Definition: type.h:49
@ SPA_TYPE_Struct
Definition: type.h:55
#define spa_return_val_if_fail(expr, val)
Definition: defs.h:456
#define SPA_CMP(a, b)
3-way comparison.
Definition: defs.h:209
spa/pod/iter.h
spa/utils/string.h
Definition: defs.h:137
uint32_t num
Definition: defs.h:138
uint32_t denom
Definition: defs.h:139
Definition: pod.h:183
Definition: pod.h:208
uint32_t key
key of property, list of valid keys depends on the object type
Definition: pod.h:209
struct spa_pod value
Definition: pod.h:226
Definition: pod.h:43
Definition: defs.h:116
uint32_t width
Definition: defs.h:117
uint32_t height
Definition: defs.h:118