#include <stdio.h>
#include "erl_driver.h"
/* -------------------------------------------------------------------------
** Data types
**/
typedef struct _erl_drv_data EchoDrvData;
/* -------------------------------------------------------------------------
** Entry struct
**/
static EchoDrvData *echo_drv_start(ErlDrvPort port, char *command);
static void echo_drv_stop(EchoDrvData *data_p);
static void echo_drv_output(EchoDrvData *data_p, char *buf, int len);
static void echo_drv_finish(void);
static int echo_drv_control(EchoDrvData *data_p, unsigned int command,
char *buf, int len,
char **rbuf, int rlen);
static ErlDrvEntry echo_drv_entry = {
NULL, /* init */
echo_drv_start,
echo_drv_stop,
echo_drv_output,
NULL, /* ready_input */
NULL, /* ready_output */
"echo_drv",
echo_drv_finish,
NULL, /* handle */
echo_drv_control,
NULL, /* timeout */
NULL, /* outputv */
NULL /* ready_async */
};
/* -------------------------------------------------------------------------
** Entry functions
**/
DRIVER_INIT(echo_drv)
{
return &echo_drv_entry;
}
static EchoDrvData *echo_drv_start(ErlDrvPort port, char *command) {
void *void_ptr;
int res = -4711;
if (command) {
while(*command != '\0' && *command != ' ')
++command;
while(*command != '\0' && *command == ' ')
++command;
if(*command == '-') {
res = driver_output(port, command+1, strlen(command) - 1);
}
}
return void_ptr = port;
}
static void echo_drv_stop(EchoDrvData *data_p) {
}
static void echo_drv_output(EchoDrvData *data_p, char *buf, int len) {
void *void_ptr;
ErlDrvPort port = void_ptr = data_p;
driver_output(port, buf, len);
}
static void echo_drv_finish() {
}
static int echo_drv_control(EchoDrvData *data_p, unsigned int command,
char *buf, int len,
char **rbuf, int rlen) {
return 0;
}