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/* Simple Plugin API */
/* SPDX-FileCopyrightText: Copyright © 2018 Wim Taymans */
/* SPDX-License-Identifier: MIT */
#ifndef SPA_POD_DYNAMIC_H
#define SPA_POD_DYNAMIC_H
#ifdef __cplusplus
extern "C" {
#endif
#include <spa/pod/builder.h>
#include <spa/utils/cleanup.h>
#ifndef SPA_API_POD_DYNAMIC
#ifdef SPA_API_IMPL
#define SPA_API_POD_DYNAMIC SPA_API_IMPL
#else
#define SPA_API_POD_DYNAMIC static inline
#endif
#endif
struct spa_pod_dynamic_builder {
struct spa_pod_builder b;
void *data;
uint32_t extend;
uint32_t _padding;
};
static int spa_pod_dynamic_builder_overflow(void *data, uint32_t size)
{
struct spa_pod_dynamic_builder *d = (struct spa_pod_dynamic_builder*)data;
int32_t old_size = d->b.size;
int32_t new_size = SPA_ROUND_UP_N(size, d->extend);
void *old_data = d->b.data, *new_data;
if (old_data == d->data)
d->b.data = NULL;
if ((new_data = realloc(d->b.data, new_size)) == NULL)
return -errno;
if (old_data == d->data && new_data != old_data && old_size > 0)
memcpy(new_data, old_data, old_size);
d->b.data = new_data;
d->b.size = new_size;
return 0;
}
SPA_API_POD_DYNAMIC void spa_pod_dynamic_builder_init(struct spa_pod_dynamic_builder *builder,
void *data, uint32_t size, uint32_t extend)
{
static const struct spa_pod_builder_callbacks spa_pod_dynamic_builder_callbacks = {
.version = SPA_VERSION_POD_BUILDER_CALLBACKS,
.overflow = spa_pod_dynamic_builder_overflow
};
builder->b = SPA_POD_BUILDER_INIT(data, size);
spa_pod_builder_set_callbacks(&builder->b, &spa_pod_dynamic_builder_callbacks, builder);
builder->extend = extend;
builder->data = data;
}
SPA_API_POD_DYNAMIC void spa_pod_dynamic_builder_clean(struct spa_pod_dynamic_builder *builder)
{
if (builder->data != builder->b.data)
free(builder->b.data);
}
SPA_DEFINE_AUTO_CLEANUP(spa_pod_dynamic_builder, struct spa_pod_dynamic_builder, {
spa_pod_dynamic_builder_clean(thing);
})
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* SPA_POD_DYNAMIC_H */