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#include "../../apis/c/operator/operator_api.h"
#include <assert.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
DoraInitResult_t dora_init_operator(void)
{
void *context = malloc(1);
char *context_char = (char *)context;
*context_char = 0;
DoraInitResult_t result = {.operator_context = context};
return result;
}
DoraResult_t dora_drop_operator(void *operator_context)
{
free(operator_context);
DoraResult_t result = {};
return result;
}
OnEventResult_t dora_on_event(
RawEvent_t *event,
const SendOutput_t *send_output,
void *operator_context)
{
OnEventResult_t result = {.status = DORA_STATUS_CONTINUE};
char *counter = (char *)operator_context;
if (event->input != NULL)
{
// input event
Input_t *input = event->input;
char *id = dora_read_input_id(input);
if (strcmp(id, "message") == 0)
{
printf("message event\n");
Vec_uint8_t data = dora_read_data(input);
assert(data.ptr != NULL);
*counter += 1;
printf("C operator received message `%.*s`, counter: %i\n", (int)data.len, data.ptr, *counter);
char *out_id = "counter";
char *out_id_heap = strdup(out_id);
int data_alloc_size = 100;
char *out_data = (char *)malloc(data_alloc_size);
int count = snprintf(out_data, data_alloc_size, "The current counter value is %d", *counter);
assert(count >= 0 && count < 100);
DoraResult_t res = dora_send_operator_output(send_output, out_id_heap, (uint8_t *)out_data, strlen(out_data));
result.result = res;
dora_free_data(data);
}
else
{
printf("C operator received unexpected input %s, context: %i\n", id, *counter);
}
dora_free_input_id(id);
}
if (event->stop)
{
printf("C operator received stop event\n");
}
return result;
}
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