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
8 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
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
13 * paragraph) shall be included in all copies or substantial portions of the
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
19 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
21 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
22 * DEALINGS IN THE SOFTWARE.
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
43 /**
44 * \addtogroup spa_pod
45 * \{
46 */
47
spa_pod_compare_value(uint32_t type,const void * r1,const void * r2,uint32_t size)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;
53 case SPA_TYPE_Bool:
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
spa_pod_compare(const struct spa_pod * pod1,const struct spa_pod * pod2)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;
174 res = spa_pod_compare_value(SPA_POD_TYPE(pod1),
175 SPA_POD_BODY(pod1), SPA_POD_BODY(pod2),
176 SPA_POD_BODY_SIZE(pod1));
177 break;
178 }
179 return res;
180 }
181
182 /**
183 * \}
184 */
185
186 #ifdef __cplusplus
187 }
188 #endif
189
190 #endif
191