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/* See LICENSE file for copyright and license details. */
#include "common.h"
/* Silence falls warning for `memcpy(&msg__[n__], (payload), (payload_size))`
* in `SEND_MESSAGE` where `payload` is assumed to be `NULL` despite being
* inside `if (payload)` */
#if defined(__GNUC__)
# pragma GCC diagnostic ignored "-Wnonnull"
#endif
/**
* Retrieve information about a CRTC:s gamma ramps, send request part
*
* Cannot be used before connecting to the server
*
* @param crtc The name of the CRTC
* @param ctx The state of the library, must be connected
* @param async Information about the request, that is needed to
* identify and parse the response, is stored here
* @return Zero on success, -1 on error
*/
int
libcoopgamma_get_gamma_info_send(const char *restrict crtc, libcoopgamma_context_t *restrict ctx,
libcoopgamma_async_context_t *restrict async)
{
#if defined(__GNUC__) && !defined(__clang__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Wnonnull-compare"
#endif
if (crtc == NULL || strchr(crtc, '\n')) {
errno = EINVAL;
goto fail;
}
#if defined(__GNUC__) && !defined(__clang__)
# pragma GCC diagnostic pop
#endif
async->message_id = ctx->message_id;
SEND_MESSAGE(ctx, NULL, (size_t)0,
"Command: get-gamma-info\n"
"Message ID: %" PRIu32 "\n"
"CRTC: %s\n"
"\n",
ctx->message_id, crtc);
return 0;
fail:
copy_errno(ctx);
return 0;
}
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