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/**
* coopgammad -- Cooperative gamma server
* Copyright (C) 2016 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 "ramps.h"
#include <libclut.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
/**
* The name of the process
*/
extern char* restrict argv0;
/**
* Marshal a ramp trio
*
* @param this The ramps
* @param buf Output buffer for the marshalled ramps,
* `NULL` just measure how large the buffers
* needs to be
* @param ramps_size The byte-size of ramps
* @return The number of marshalled byte
*/
size_t gamma_ramps_marshal(const union gamma_ramps* restrict this, void* restrict buf, size_t ramps_size)
{
if (buf != NULL)
memcpy(buf, this->u8.red, ramps_size);
return ramps_size;
}
/**
* Unmarshal a ramp trio
*
* @param this Output for the ramps, `.red_size`, `.green_size`,
* and `.blue_size` must already be set
* @param buf Buffer with the marshalled ramps
* @param ramps_size The byte-size of ramps
* @return The number of unmarshalled bytes, 0 on error
*/
size_t gamma_ramps_unmarshal(union gamma_ramps* restrict this, const void* restrict buf, size_t ramps_size)
{
size_t depth = ramps_size / (this->u8.red_size + this->u8.green_size + this->u8.blue_size);
int r = 0;
switch (depth)
{
case 1:
r = libgamma_gamma_ramps8_initialise(&(this->u8));
break;
case 2:
r = libgamma_gamma_ramps16_initialise(&(this->u16));
break;
case 4:
r = libgamma_gamma_ramps32_initialise(&(this->u32));
break;
case 8:
r = libgamma_gamma_ramps64_initialise(&(this->u64));
break;
default:
if (depth == sizeof(float))
r = libgamma_gamma_rampsf_initialise(&(this->f));
else if (depth == sizeof(double))
r = libgamma_gamma_rampsd_initialise(&(this->d));
else
abort();
break;
}
if (r)
{
libgamma_perror(argv0, r);
errno = 0;
return 0;
}
memcpy(this->u8.red, buf, ramps_size);
return ramps_size;
}
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