/**
* mds — A micro-display server
* Copyright © 2014, 2015, 2016, 2017 Mattias Andrée (maandree@kth.se)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "interception-condition.h"
#include <libmdsserver/macros.h>
#include <string.h>
#include <stdlib.h>
/**
* Calculate the buffer size need to marshal an interception condition
*
* @param this The interception condition
* @return The number of bytes to allocate to the output buffer
*/
size_t
interception_condition_marshal_size(const interception_condition_t *restrict this)
{
return sizeof(size_t) + sizeof(int64_t) + 2 * sizeof(int) + (strlen(this->condition) + 1) * sizeof(char);
}
/**
* Marshals an interception condition
*
* @param this The interception condition
* @param data Output buffer for the marshalled data
* @return The number of bytes that have been written (everything will be written)
*/
size_t
interception_condition_marshal(const interception_condition_t *restrict this, char *restrict data)
{
size_t n = (strlen(this->condition) + 1) * sizeof(char);
buf_set_next(data, int, INTERCEPTION_CONDITION_T_VERSION);
buf_set_next(data, size_t, this->header_hash);
buf_set_next(data, int64_t, this->priority);
buf_set_next(data, int, this->modifying);
memcpy(data, this->condition, n);
return sizeof(size_t) + sizeof(int64_t) + 2 * sizeof(int) + n;
}
/**
* Unmarshals an interception condition
*
* @param this Memory slot in which to store the new interception condition
* @param data In buffer with the marshalled data
* @return Zero on error, `errno` will be set accordingly, otherwise the number of read bytes
*/
size_t
interception_condition_unmarshal(interception_condition_t *restrict this, char *restrict data)
{
size_t n;
this->condition = NULL;
/* buf_get_next(data, int, INTERCEPTION_CONDITION_T_VERSION); */
buf_next(data, int, 1);
buf_get_next(data, size_t, this->header_hash);
buf_get_next(data, int64_t, this->priority);
buf_get_next(data, int, this->modifying);
n = strlen(data) + 1;
fail_if (xmemdup(this->condition, data, n, char));
return sizeof(size_t) + sizeof(int64_t) + 2 * sizeof(int) + n * sizeof(char);
fail:
return 0;
}
/**
* Pretend to an interception condition
*
* @param data In buffer with the marshalled data
* @return The number of read bytes
*/
size_t
interception_condition_unmarshal_skip(char *restrict data)
{
size_t n = sizeof(size_t) + sizeof(int64_t) + 2 * sizeof(int);
buf_next(data, int, 1);
buf_next(data, size_t, 1);
buf_next(data, int64_t, 1);
buf_next(data, int, 1);
n += (strlen(data) + 1) * sizeof(char);
return n;
}
