#include <socks/device.h>

struct char_device *char_device_create(void)
{
	struct device *dev = device_alloc();
	if (!dev) {
		return NULL;
	}

	dev->dev_type = DEV_TYPE_CHAR;

	return CHAR_DEVICE(dev);
}

struct char_device *char_device_from_generic(struct device *dev)
{
	dev->dev_type = DEV_TYPE_CHAR;
	return CHAR_DEVICE(dev);
}

static kern_status_t char_device_read(struct device *dev, void *buf, size_t offset, size_t size, size_t *bytes_read, socks_flags_t flags)
{
	kern_status_t status = KERN_UNSUPPORTED;
	struct char_device *cdev = CHAR_DEVICE(dev);

	if (cdev->c_ops && cdev->c_ops->read) {
		status = cdev->c_ops->read(dev, buf, offset, size, bytes_read, flags);
	}

	return status;
}

static kern_status_t char_device_write(struct device *dev, const void *buf, size_t offset, size_t size, size_t *bytes_read, socks_flags_t flags)
{
	kern_status_t status = KERN_UNSUPPORTED;
	struct char_device *cdev = CHAR_DEVICE(dev);

	if (cdev->c_ops && cdev->c_ops->write) {
		status = cdev->c_ops->write(dev, buf, offset, size, bytes_read, flags);
	}

	return status;
}

struct device_type_ops char_type_ops = {
	.read = char_device_read,
	.write = char_device_write,
};