rtl_433/src/output_trigger.c

59 lines
1.4 KiB
C

/** @file
Trigger output for rtl_433 events.
Copyright (C) 2021 Christian Zuckschwerdt
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 2 of the License, or
(at your option) any later version.
*/
#include "output_trigger.h"
#include "data.h"
#include "r_util.h"
#include "fatal.h"
#include <stdio.h>
#include <stdlib.h>
/* Trigger printer */
typedef struct {
struct data_output output;
FILE *file;
} data_output_trigger_t;
static void R_API_CALLCONV data_output_trigger_print(data_output_t *output, data_t *data)
{
UNUSED(data);
data_output_trigger_t *trigger = (data_output_trigger_t *)output;
fputc('1', trigger->file);
fflush(trigger->file);
}
static void R_API_CALLCONV data_output_trigger_free(data_output_t *output)
{
if (!output)
return;
free(output);
}
struct data_output *data_output_trigger_create(FILE *file)
{
data_output_trigger_t *trigger = calloc(1, sizeof(data_output_trigger_t));
if (!trigger) {
WARN_CALLOC("data_output_trigger_create()");
return NULL; // NOTE: returns NULL on alloc failure.
}
trigger->output.output_print = data_output_trigger_print;
trigger->output.output_free = data_output_trigger_free;
trigger->file = file;
return (struct data_output *)trigger;
}