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/* See LICENSE file for copyright and license details. */
#include "types-filter.h"
#include "util.h"
#include <stdlib.h>
#include <string.h>
/**
* Free all resources allocated to a filter.
* The allocation of `filter` itself is not freed.
*
* @param this The filter
*/
void
filter_destroy(struct filter *restrict this)
{
free(this->class);
free(this->ramps);
}
#if defined(__clang__)
# pragma GCC diagnostic ignored "-Wcast-align"
#endif
/**
* Marshal a filter
*
* @param this The filter
* @param buf Output buffer for the marshalled filter,
* `NULL` just measure how large the buffers
* needs to be
* @param ramps_size The byte-size of `this->ramps`
* @return The number of marshalled byte
*/
size_t
filter_marshal(const struct filter *restrict this, void *restrict buf, size_t ramps_size)
{
size_t off = 0, n;
char nonnulls = 0;
char *restrict bs = buf;
if (bs) {
if (this->class)
nonnulls |= 1;
if (this->ramps)
nonnulls |= 2;
bs[off] = nonnulls;
}
off += 1;
if (bs)
*(int64_t *)&bs[off] = this->priority;
off += sizeof(int64_t);
if (bs)
*(enum lifespan *)&bs[off] = this->lifespan;
off += sizeof(enum lifespan);
if (this->class) {
n = strlen(this->class) + 1;
if (bs)
memcpy(&bs[off], this->class, n);
off += n;
}
if (this->ramps) {
if (bs)
memcpy(&bs[off], this->ramps, ramps_size);
off += ramps_size;
}
return off;
}
/**
* Unmarshal a filter
*
* @param this Output for the filter
* @param buf Buffer with the marshalled filter
* @param ramps_size The byte-size of `this->ramps`
* @return The number of unmarshalled bytes, 0 on error
*/
size_t
filter_unmarshal(struct filter *restrict this, const void *restrict buf, size_t ramps_size)
{
size_t off = 0, n;
char nonnulls = 0;
const char *restrict bs = buf;
nonnulls = bs[off];
off += 1;
this->class = NULL;
this->ramps = NULL;
this->priority = *(const int64_t *)&bs[off];
off += sizeof(int64_t);
this->lifespan = *(const enum lifespan *)&bs[off];
off += sizeof(enum lifespan);
if (nonnulls & 1) {
n = strlen(&bs[off]) + 1;
if (!(this->class = memdup(&bs[off], n)))
goto fail;
off += n;
}
if (nonnulls & 2) {
if (!(this->ramps = memdup(&bs[off], ramps_size)))
goto fail;
off += ramps_size;
}
return off;
fail:
free(this->class);
free(this->ramps);
return 0;
}
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