PipeWire  0.3.53
compare.h
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1 /* Simple Plugin API
2  *
3  * Copyright © 2018 Wim Taymans
4  *
5  * Permission is hereby granted, free of charge, to any person obtaining a
6  * copy of this software and associated documentation files (the "Software"),
7  * to deal in the Software without restriction, including without limitation
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9  * and/or sell copies of the Software, and to permit persons to whom the
10  * Software is furnished to do so, subject to the following conditions:
11  *
12  * The above copyright notice and this permission notice (including the next
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14  * Software.
15  *
16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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23  */
24 
25 #ifndef SPA_POD_COMPARE_H
26 #define SPA_POD_COMPARE_H
27 
28 #ifdef __cplusplus
29 extern "C" {
30 #endif
31 
32 #include <stdarg.h>
33 #include <errno.h>
34 #include <stdint.h>
35 #include <stddef.h>
36 #include <stdio.h>
37 #include <string.h>
38 
39 #include <spa/param/props.h>
40 #include <spa/pod/iter.h>
41 #include <spa/pod/builder.h>
42 
48 static inline int spa_pod_compare_value(uint32_t type, const void *r1, const void *r2, uint32_t size)
49 {
50  switch (type) {
51  case SPA_TYPE_None:
52  return 0;
54  case SPA_TYPE_Id:
55  return *(uint32_t *) r1 == *(uint32_t *) r2 ? 0 : 1;
56  case SPA_TYPE_Int:
57  return *(int32_t *) r1 - *(int32_t *) r2;
58  case SPA_TYPE_Long:
59  return *(int64_t *) r1 - *(int64_t *) r2;
60  case SPA_TYPE_Float:
61  return *(float *) r1 - *(float *) r2;
62  case SPA_TYPE_Double:
63  return *(double *) r1 - *(double *) r2;
64  case SPA_TYPE_String:
65  return strcmp((char *)r1, (char *)r2);
66  case SPA_TYPE_Bytes:
67  return memcmp((char *)r1, (char *)r2, size);
68  case SPA_TYPE_Rectangle:
69  {
70  const struct spa_rectangle *rec1 = (struct spa_rectangle *) r1,
71  *rec2 = (struct spa_rectangle *) r2;
72  if (rec1->width == rec2->width && rec1->height == rec2->height)
73  return 0;
74  else if (rec1->width < rec2->width || rec1->height < rec2->height)
75  return -1;
76  else
77  return 1;
78  }
79  case SPA_TYPE_Fraction:
80  {
81  const struct spa_fraction *f1 = (struct spa_fraction *) r1,
82  *f2 = (struct spa_fraction *) r2;
83  int64_t n1, n2;
84  n1 = ((int64_t) f1->num) * f2->denom;
85  n2 = ((int64_t) f2->num) * f1->denom;
86  if (n1 < n2)
87  return -1;
88  else if (n1 > n2)
89  return 1;
90  else
91  return 0;
92  }
93  default:
94  break;
95  }
96  return 0;
97 }
98 
99 static inline int spa_pod_compare(const struct spa_pod *pod1,
100  const struct spa_pod *pod2)
101 {
102  int res = 0;
103  uint32_t n_vals1, n_vals2;
104  uint32_t choice1, choice2;
105 
106  spa_return_val_if_fail(pod1 != NULL, -EINVAL);
107  spa_return_val_if_fail(pod2 != NULL, -EINVAL);
108 
109  pod1 = spa_pod_get_values(pod1, &n_vals1, &choice1);
110  pod2 = spa_pod_get_values(pod2, &n_vals2, &choice2);
111 
112  if (n_vals1 != n_vals2)
113  return -EINVAL;
114 
115  if (SPA_POD_TYPE(pod1) != SPA_POD_TYPE(pod2))
116  return -EINVAL;
117 
118  switch (SPA_POD_TYPE(pod1)) {
119  case SPA_TYPE_Struct:
120  {
121  const struct spa_pod *p1, *p2;
122  size_t p1s, p2s;
123 
124  p1 = (const struct spa_pod*)SPA_POD_BODY_CONST(pod1);
125  p1s = SPA_POD_BODY_SIZE(pod1);
126  p2 = (const struct spa_pod*)SPA_POD_BODY_CONST(pod2);
127  p2s = SPA_POD_BODY_SIZE(pod2);
128 
129  while (true) {
130  if (!spa_pod_is_inside(pod1, p1s, p1) ||
131  !spa_pod_is_inside(pod2, p2s, p2))
132  return -EINVAL;
133 
134  if ((res = spa_pod_compare(p1, p2)) != 0)
135  return res;
136 
137  p1 = (const struct spa_pod*)spa_pod_next(p1);
138  p2 = (const struct spa_pod*)spa_pod_next(p2);
139  }
140  break;
141  }
142  case SPA_TYPE_Object:
143  {
144  const struct spa_pod_prop *p1, *p2;
145  const struct spa_pod_object *o1, *o2;
146 
147  o1 = (const struct spa_pod_object*)pod1;
148  o2 = (const struct spa_pod_object*)pod2;
149 
150  p2 = NULL;
151  SPA_POD_OBJECT_FOREACH(o1, p1) {
152  if ((p2 = spa_pod_object_find_prop(o2, p2, p1->key)) == NULL)
153  return 1;
154  if ((res = spa_pod_compare(&p1->value, &p2->value)) != 0)
155  return res;
156  }
157  p1 = NULL;
158  SPA_POD_OBJECT_FOREACH(o2, p2) {
159  if ((p1 = spa_pod_object_find_prop(o1, p1, p2->key)) == NULL)
160  return -1;
161  }
162  break;
163  }
164  case SPA_TYPE_Array:
165  {
166  if (SPA_POD_BODY_SIZE(pod1) != SPA_POD_BODY_SIZE(pod2))
167  return -EINVAL;
168  res = memcmp(SPA_POD_BODY(pod1), SPA_POD_BODY(pod2), SPA_POD_BODY_SIZE(pod2));
169  break;
170  }
171  default:
172  if (SPA_POD_BODY_SIZE(pod1) != SPA_POD_BODY_SIZE(pod2))
173  return -EINVAL;
175  SPA_POD_BODY(pod1), SPA_POD_BODY(pod2),
176  SPA_POD_BODY_SIZE(pod1));
177  break;
178  }
179  return res;
180 }
181 
186 #ifdef __cplusplus
187 }
188 #endif
189 
190 #endif
spa/pod/builder.h
static struct spa_pod * spa_pod_get_values(const struct spa_pod *pod, uint32_t *n_vals, uint32_t *choice)
Definition: iter.h:367
static 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:408
#define SPA_POD_BODY_CONST(pod)
Definition: pod.h:61
static int spa_pod_compare_value(uint32_t type, const void *r1, const void *r2, uint32_t size)
Definition: compare.h:53
#define SPA_POD_OBJECT_FOREACH(obj, iter)
Definition: iter.h:128
#define SPA_POD_BODY(pod)
Definition: pod.h:59
#define SPA_POD_TYPE(pod)
Definition: pod.h:48
#define SPA_POD_BODY_SIZE(pod)
Definition: pod.h:46
static bool spa_pod_is_inside(const void *pod, uint32_t size, const void *iter)
Definition: iter.h:54
static int spa_pod_compare(const struct spa_pod *pod1, const struct spa_pod *pod2)
Definition: compare.h:104
static void * spa_pod_next(const void *iter)
Definition: iter.h:60
@ SPA_TYPE_Int
Definition: type.h:54
@ SPA_TYPE_Rectangle
Definition: type.h:60
@ SPA_TYPE_Long
Definition: type.h:55
@ SPA_TYPE_Bool
Definition: type.h:52
@ SPA_TYPE_Bytes
Definition: type.h:59
@ SPA_TYPE_Object
Definition: type.h:65
@ SPA_TYPE_Float
Definition: type.h:56
@ SPA_TYPE_Fraction
Definition: type.h:61
@ SPA_TYPE_None
Definition: type.h:51
@ SPA_TYPE_Double
Definition: type.h:57
@ SPA_TYPE_Id
Definition: type.h:53
@ SPA_TYPE_Array
Definition: type.h:63
@ SPA_TYPE_String
Definition: type.h:58
@ SPA_TYPE_Struct
Definition: type.h:64
#define spa_return_val_if_fail(expr, val)
Definition: defs.h:333
spa/pod/iter.h
spa/utils/string.h
Definition: defs.h:121
uint32_t num
Definition: defs.h:122
uint32_t denom
Definition: defs.h:123
Definition: pod.h:203
Definition: pod.h:228
uint32_t key
key of property, list of valid keys depends on the object type
Definition: pod.h:229
struct spa_pod value
Definition: pod.h:246
Definition: pod.h:63
Definition: defs.h:100
uint32_t width
Definition: defs.h:101
uint32_t height
Definition: defs.h:102