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Diffstat (limited to 'third_party/pipewire/spa/pod/compare.h')
| -rw-r--r-- | third_party/pipewire/spa/pod/compare.h | 190 |
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 new file mode 100644 index 0000000000..3fd9d00a5b --- /dev/null +++ b/third_party/pipewire/spa/pod/compare.h @@ -0,0 +1,190 @@ +/* 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 |