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/*
* io.c
*
* Copyright (C) 2011 Holger Freyther, all rights reserved
*
* 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, version 2.
*/
#include "io.h"
#include <stdio.h>
static struct io_driver *g_driver = NULL;
static struct io_driver *drivers[5] = { NULL, };
static int last_driver = 0;
#define ARRAY_SIZE(x) (sizeof(x)/sizeof((x)[0]))
int io_driver_register(struct io_driver *driver)
{
if (last_driver > ARRAY_SIZE(drivers)) {
fprintf(stderr, "Registered more than %zu devices.\n",
ARRAY_SIZE(drivers));
return -1;
}
drivers[last_driver++] = driver;
return 0;
}
static void io_driver_activate(struct io_driver *driver)
{
printf("Activating driver: %s\n", driver->name);
g_driver = driver;
}
int io_init(char *dev)
{
return g_driver->io_init(dev);
}
int io_cleanup(void)
{
return g_driver->io_cleanup();
}
int io_write(void *buff, int len)
{
return g_driver->io_write(buff, len);
}
int io_read(void *buff, int len)
{
return g_driver->io_read(buff, len);
}
void io_driver_select_backend(const char *name)
{
int i;
struct io_driver *driver = drivers[0];
for ( i = 0; ;++i) {
if (!drivers[i])
break;
if (name && strcmp("posix", drivers[i]->name) == 0) {
driver = drivers[i];
break;
} else if (!name && strcmp("libusb", drivers[i]->name) == 0) {
driver = drivers[i];
break;
}
}
io_driver_activate(driver);
}
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