dynamic.h
/* 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_DYNAMIC_H
#define SPA_POD_DYNAMIC_H
#ifdef __cplusplus
extern "C" {
#endif
#include <spa/pod/builder.h>
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;
if (old_data == d->data)
d->b.data = NULL;
if ((d->b.data = realloc(d->b.data, new_size)) == NULL)
return -errno;
if (old_data == d->data && d->b.data != old_data && old_size > 0)
memcpy(d->b.data, old_data, old_size);
d->b.size = new_size;
return 0;
}
static inline 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 = {
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;
}
static inline void spa_pod_dynamic_builder_clean(struct spa_pod_dynamic_builder *builder)
{
if (builder->data != builder->b.data)
free(builder->b.data);
}
#ifdef __cplusplus
} /* extern "C" */
#endif
#endif /* SPA_POD_DYNAMIC_H */
builder.h
spa/pod/builder.h
spa_pod_builder_set_callbacks
static void spa_pod_builder_set_callbacks(struct spa_pod_builder *builder, const struct spa_pod_builder_callbacks *callbacks, void *data)
Definition: builder.h:91
SPA_POD_BUILDER_INIT
#define SPA_POD_BUILDER_INIT(buffer, size)
Definition: builder.h:82
SPA_VERSION_POD_BUILDER_CALLBACKS
#define SPA_VERSION_POD_BUILDER_CALLBACKS
Definition: builder.h:67
SPA_ROUND_UP_N
#define SPA_ROUND_UP_N(num, align)
Definition: defs.h:296
spa_pod_builder_callbacks
Definition: builder.h:65
spa_pod_builder
Definition: builder.h:73
spa_pod_builder::data
void * data
Definition: builder.h:74
spa_pod_builder::size
uint32_t size
Definition: builder.h:75
spa_pod_dynamic_builder
Definition: dynamic.h:38
spa_pod_dynamic_builder::extend
uint32_t extend
Definition: dynamic.h:41
spa_pod_dynamic_builder::_padding
uint32_t _padding
Definition: dynamic.h:42
spa_pod_dynamic_builder::b
struct spa_pod_builder b
Definition: dynamic.h:39
spa_pod_dynamic_builder::data
void * data
Definition: dynamic.h:40