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-rw-r--r--third_party/pipewire/spa/pod/compare.h190
1 files changed, 190 insertions, 0 deletions
diff --git a/third_party/pipewire/spa/pod/compare.h b/third_party/pipewire/spa/pod/compare.h
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+++ b/third_party/pipewire/spa/pod/compare.h
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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