/*
 * Copyright © 2011 Red Hat, Inc.
 *
 * Permission to use, copy, modify, distribute, and sell this software
 * and its documentation for any purpose is hereby granted without
 * fee, provided that the above copyright notice appear in all copies
 * and that both that copyright notice and this permission notice
 * appear in supporting documentation, and that the name of Red Hat
 * not be used in advertising or publicity pertaining to distribution
 * of the software without specific, written prior permission.  Red
 * Hat makes no representations about the suitability of this software
 * for any purpose.  It is provided "as is" without express or implied
 * warranty.
 *
 * THE AUTHORS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN
 * NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
 * OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
 * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
 * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 *
 * Authors:
 *	Peter Hutterer (peter.hutterer@redhat.com)
 */

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include "libwacomint.h"
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <gudev/gudev.h>

static const WacomDevice *
libwacom_get_device(WacomDeviceDatabase *db, const char *match)
{
	return (WacomDevice *) g_hash_table_lookup (db->device_ht, match);
}

static gboolean
is_tablet_or_touchpad (GUdevDevice *device)
{
	return g_udev_device_get_property_as_boolean (device, "ID_INPUT_TABLET") ||
		g_udev_device_get_property_as_boolean (device, "ID_INPUT_TOUCHPAD");
}

/* Overriding SUBSYSTEM isn't allowed in udev (works sometimes, but not
 * always). For evemu devices we need to set custom properties to make them
 * detected by libwacom.
 */
static char *
get_uinput_subsystem (GUdevDevice *device)
{
	const char *bus_str;
	GUdevDevice *parent;


	bus_str = NULL;
	parent = g_object_ref (device);

	while (parent && !g_udev_device_get_property_as_boolean (parent, "UINPUT_DEVICE")) {
		GUdevDevice *old_parent = parent;
		parent = g_udev_device_get_parent (old_parent);
		g_object_unref (old_parent);
	}

	if (parent) {
		bus_str = g_udev_device_get_property (parent, "UINPUT_SUBSYSTEM");
		g_object_unref (parent);
	}

	return bus_str ? g_strdup (bus_str) : NULL;
}

static char *
get_bus (GUdevDevice *device)
{
	const char *subsystem;
	char *bus_str;
	GUdevDevice *parent;

	bus_str = get_uinput_subsystem (device);
	if (bus_str)
		return bus_str;

	subsystem = g_udev_device_get_subsystem (device);
	parent = g_object_ref (device);

	while (parent && g_strcmp0 (subsystem, "input") == 0) {
		GUdevDevice *old_parent = parent;
		parent = g_udev_device_get_parent (old_parent);
		if (parent)
			subsystem = g_udev_device_get_subsystem (parent);
		g_object_unref (old_parent);
	}

	if (parent) {
		if (g_strcmp0 (subsystem, "tty") == 0 || g_strcmp0 (subsystem, "serio") == 0)
			bus_str = g_strdup ("serial");
		else
			bus_str = g_strdup (subsystem);

		g_object_unref (parent);
	} else
		bus_str = strdup("unknown");

	return bus_str;
}

static gboolean
get_device_info (const char   *path,
		 int          *vendor_id,
		 int          *product_id,
		 char        **name,
		 WacomBusType *bus,
		 IsBuiltin    *builtin,
		 WacomError   *error)
{
	GUdevClient *client;
	GUdevDevice *device;
	const char * const subsystems[] = { "input", NULL };
	gboolean retval;
	char *bus_str;
	const char *devname;

	g_type_init();

	retval = FALSE;
	*builtin = IS_BUILTIN_UNSET;
	*name = NULL;
	bus_str = NULL;
	client = g_udev_client_new (subsystems);
	device = g_udev_client_query_by_device_file (client, path);
	if (device == NULL) {
		libwacom_error_set(error, WERROR_INVALID_PATH, "Could not find device '%s' in udev", path);
		goto bail;
	}

	/* Touchpads are only for the "Finger" part of Bamboo devices */
	if (!is_tablet_or_touchpad(device)) {
		GUdevDevice *parent;

		parent = g_udev_device_get_parent(device);
		if (!parent || !is_tablet_or_touchpad(parent)) {
			libwacom_error_set(error, WERROR_INVALID_PATH, "Device '%s' is not a tablet", path);
			g_object_unref (parent);
			goto bail;
		}
		g_object_unref (parent);
	}

	bus_str = get_bus (device);

	/* Is the device builtin? */
	devname = g_udev_device_get_name (device);
	if (devname != NULL) {
		char *sysfs_path, *contents;

		sysfs_path = g_build_filename ("/sys/class/input", devname, "device/properties", NULL);
		if (g_file_get_contents (sysfs_path, &contents, NULL, NULL)) {
			int flag;

			/* 0x01: POINTER flag
			 * 0x02: DIRECT flag */
			flag = atoi(contents);
			*builtin = (flag & 0x02) == 0x02 ? IS_BUILTIN_TRUE : IS_BUILTIN_FALSE;
			g_free (contents);
		}
		g_free (sysfs_path);
	}

	*name = g_strdup (g_udev_device_get_sysfs_attr (device, "name"));
	/* Try getting the name from the parent if that fails */
	if (*name == NULL) {
		GUdevDevice *parent;

		parent = g_udev_device_get_parent (device);
		*name = g_strdup (g_udev_device_get_sysfs_attr (parent, "name"));
		g_object_unref (parent);
	}

	*bus = bus_from_str (bus_str);
	if (*bus == WBUSTYPE_USB) {
		const char *vendor_str, *product_str;
		GUdevDevice *parent;

		vendor_str = g_udev_device_get_property (device, "ID_VENDOR_ID");
		product_str = g_udev_device_get_property (device, "ID_MODEL_ID");

		parent = NULL;
		/* uinput devices have the props set on the parent, there is
		 * nothing a a udev rule can match on on the child */
		if (!vendor_str || !product_str) {
			parent = g_udev_device_get_parent (device);
			if (parent) {
				vendor_str = g_udev_device_get_property (parent, "ID_VENDOR_ID");
				product_str = g_udev_device_get_property (parent, "ID_MODEL_ID");
			}
		}

		*vendor_id = strtol (vendor_str, NULL, 16);
		*product_id = strtol (product_str, NULL, 16);

		if (parent)
			g_object_unref (parent);
	} else if (*bus == WBUSTYPE_BLUETOOTH || *bus == WBUSTYPE_SERIAL) {
		GUdevDevice *parent;
		const char *product_str;
		int garbage;

		/* Parse that:
		 * E: PRODUCT=5/56a/81/100
		 * into:
		 * vendor 0x56a
		 * product 0x81 */
		parent = g_object_ref (device);
		product_str = g_udev_device_get_property (device, "PRODUCT");

		while (!product_str && parent) {
			GUdevDevice *old_parent = parent;
			parent = g_udev_device_get_parent (old_parent);
			if (parent)
				product_str = g_udev_device_get_property (parent, "PRODUCT");
			g_object_unref (old_parent);
		}

		if (product_str) {
			if (sscanf(product_str, "%d/%x/%x/%d", &garbage, vendor_id, product_id, &garbage) != 4) {
				libwacom_error_set(error, WERROR_UNKNOWN_MODEL, "Unable to parse model identification");
				g_object_unref(parent);
				goto bail;
			}
		} else {
			g_assert(*bus == WBUSTYPE_SERIAL);

			*vendor_id = 0;
			*product_id = 0;
		}
		if (parent)
			g_object_unref (parent);
	} else {
		libwacom_error_set(error, WERROR_UNKNOWN_MODEL, "Unsupported bus '%s'", bus_str);
		goto bail;
	}

	if (*bus != WBUSTYPE_UNKNOWN &&
	    vendor_id != 0 &&
	    product_id != 0)
		retval = TRUE;
	/* The serial bus uses 0:0 as the vid/pid */
	if (*bus == WBUSTYPE_SERIAL)
		retval = TRUE;

bail:
	if (bus_str != NULL)
		g_free (bus_str);
	if (retval == FALSE)
		g_free (*name);
	if (device != NULL)
		g_object_unref (device);
	if (client != NULL)
		g_object_unref (client);
	return retval;
}

static WacomMatch *libwacom_copy_match(const WacomMatch *src)
{
	WacomMatch *dst;

	dst = g_new0(WacomMatch, 1);
	dst->match = g_strdup(src->match);
	dst->bus = src->bus;
	dst->vendor_id = src->vendor_id;
	dst->product_id = src->product_id;

	return dst;
}

static WacomDevice *
libwacom_copy(const WacomDevice *device)
{
	WacomDevice *d;
	int i;

	d = g_new0 (WacomDevice, 1);
	g_atomic_int_inc(&d->refcnt);
	d->name = g_strdup (device->name);
	d->width = device->width;
	d->height = device->height;
	d->nmatches = device->nmatches;
	d->matches = g_malloc((d->nmatches + 1) * sizeof(WacomMatch*));
	for (i = 0; i < d->nmatches; i++)
		d->matches[i] = libwacom_copy_match(device->matches[i]);
	d->matches[d->nmatches] = NULL;
	d->match = device->match;
	d->cls = device->cls;
	d->num_strips = device->num_strips;
	d->features = device->features;
	d->strips_num_modes = device->strips_num_modes;
	d->ring_num_modes = device->ring_num_modes;
	d->ring2_num_modes = device->ring2_num_modes;
	d->num_styli = device->num_styli;
	d->supported_styli = g_memdup (device->supported_styli, sizeof(int) * device->num_styli);
	d->num_buttons = device->num_buttons;
	d->buttons = g_memdup (device->buttons, sizeof(WacomButtonFlags) * device->num_buttons);
	return d;
}


static int
compare_matches(WacomDevice *a, WacomDevice *b)
{
	const WacomMatch **ma, **mb, **match_a, **match_b;

	ma = libwacom_get_matches(a);
	mb = libwacom_get_matches(b);

	for (match_a = ma; *match_a; match_a++) {
		int found = 0;
		for (match_b = mb; !found && *mb; mb++) {
			if (strcmp((*match_a)->match, (*match_b)->match) == 0)
				found = 1;
		}
		if (!found)
			return 1;
	}

	return 0;
}

int
libwacom_compare(WacomDevice *a, WacomDevice *b, WacomCompareFlags flags)
{
	g_return_val_if_fail(a || b, 0);

	if ((a && !b) || (b && !a))
		return 1;

	if (strcmp(a->name, b->name) != 0)
		return 1;

	if (a->width != b->width || a->height != b->height)
		return 1;

	if (a->cls != b->cls)
		return 1;

	if (a->num_strips != b->num_strips)
		return 1;

	if (a->features != b->features)
		return 1;

	if (a->strips_num_modes != b->strips_num_modes)
		return 1;

	if (a->ring_num_modes != b->ring_num_modes)
		return 1;

	if (a->ring2_num_modes != b->ring2_num_modes)
		return 1;

	if (a->num_buttons != b->num_buttons)
		return 1;

	if (a->num_styli != b->num_styli)
		return 1;

	if (memcmp(a->supported_styli, b->supported_styli, sizeof(int) * a->num_styli) != 0)
		return 1;

	if (memcmp(a->buttons, b->buttons, sizeof(WacomButtonFlags) * a->num_buttons) != 0)
		return 1;

	if ((flags & WCOMPARE_MATCHES) && compare_matches(a, b) != 0)
		return 1;
	else if (strcmp(a->matches[a->match]->match, b->matches[b->match]->match) != 0)
		return 1;

	return 0;
}

static const WacomDevice *
libwacom_new (WacomDeviceDatabase *db, int vendor_id, int product_id, WacomBusType bus, WacomError *error)
{
	const WacomDevice *device;
	char *match;

	if (!db) {
		libwacom_error_set(error, WERROR_INVALID_DB, "db is NULL");
		return NULL;
	}

	match = make_match_string(bus, vendor_id, product_id);
	device = libwacom_get_device(db, match);
	g_free (match);

	return device;
}

WacomDevice*
libwacom_new_from_path(WacomDeviceDatabase *db, const char *path, WacomFallbackFlags fallback, WacomError *error)
{
	int vendor_id, product_id;
	WacomBusType bus;
	const WacomDevice *device;
	WacomDevice *ret;
	IsBuiltin builtin;
	char *name;

	if (!db) {
		libwacom_error_set(error, WERROR_INVALID_DB, "db is NULL");
		return NULL;
	}

	if (!path) {
		libwacom_error_set(error, WERROR_INVALID_PATH, "path is NULL");
		return NULL;
	}

	if (!get_device_info (path, &vendor_id, &product_id, &name, &bus, &builtin, error))
		return NULL;

	device = libwacom_new (db, vendor_id, product_id, bus, error);
	if (device != NULL)
		ret = libwacom_copy(device);
	else if (fallback == WFALLBACK_NONE)
		goto bail;

	if (device == NULL && fallback == WFALLBACK_GENERIC) {
		device = libwacom_get_device(db, "generic");
		if (device == NULL)
			goto bail;

		ret = libwacom_copy(device);

		if (name != NULL) {
			g_free (ret->name);
			ret->name = name;
		}
	} else {
		g_free (name);
	}

	/* for multiple-match devices, set to the one we requested */
	libwacom_update_match(ret, bus, vendor_id, product_id);

	if (device) {
		if (builtin == IS_BUILTIN_TRUE)
			ret->features |= FEATURE_BUILTIN;
		else if (builtin == IS_BUILTIN_FALSE)
			ret->features &= ~FEATURE_BUILTIN;

		return ret;
	}

bail:
	g_free (name);
	libwacom_error_set(error, WERROR_UNKNOWN_MODEL, NULL);
	return NULL;
}

WacomDevice*
libwacom_new_from_usbid(WacomDeviceDatabase *db, int vendor_id, int product_id, WacomError *error)
{
	const WacomDevice *device;

	if (!db) {
		libwacom_error_set(error, WERROR_INVALID_DB, "db is NULL");
		return NULL;
	}

	device = libwacom_new(db, vendor_id, product_id, WBUSTYPE_USB, error);

	if (device)
		return libwacom_copy(device);

	libwacom_error_set(error, WERROR_UNKNOWN_MODEL, NULL);
	return NULL;
}

WacomDevice*
libwacom_new_from_name(WacomDeviceDatabase *db, const char *name, WacomError *error)
{
	const WacomDevice *device;
	GList *keys, *l;

	if (!db) {
		libwacom_error_set(error, WERROR_INVALID_DB, "db is NULL");
		return NULL;
	}

	device = NULL;
	keys = g_hash_table_get_values (db->device_ht);
	for (l = keys; l; l = l->next) {
		WacomDevice *d = l->data;

		if (g_strcmp0 (d->name, name) == 0) {
			device = d;
			break;
		}
	}
	g_list_free (keys);

	if (device)
		return libwacom_copy(device);

	libwacom_error_set(error, WERROR_UNKNOWN_MODEL, NULL);
	return NULL;
}

static void print_styli_for_device (int fd, WacomDevice *device)
{
	int nstyli;
	const int *styli;
	int i;

	if (!libwacom_has_stylus(device))
		return;

	styli = libwacom_get_supported_styli(device, &nstyli);

	dprintf(fd, "Styli=");
	for (i = 0; i < nstyli; i++)
		dprintf(fd, "%#x;", styli[i]);
	dprintf(fd, "\n");
}

static void print_button_flag_if(int fd, WacomDevice *device, const char *label, int flag)
{
	int nbuttons = libwacom_get_num_buttons(device);
	char b;
	dprintf(fd, "%s=", label);
	for (b = 'A'; b < 'A' + nbuttons; b++)
		if (libwacom_get_button_flag(device, b) & flag)
			dprintf(fd, "%c;", b);
	dprintf(fd, "\n");
}

static void print_buttons_for_device (int fd, WacomDevice *device)
{
	int nbuttons = libwacom_get_num_buttons(device);

	if (nbuttons == 0)
		return;

	dprintf(fd, "[Buttons]\n");

	print_button_flag_if(fd, device, "Left", WACOM_BUTTON_POSITION_LEFT);
	print_button_flag_if(fd, device, "Right", WACOM_BUTTON_POSITION_RIGHT);
	print_button_flag_if(fd, device, "Top", WACOM_BUTTON_POSITION_TOP);
	print_button_flag_if(fd, device, "Bottom", WACOM_BUTTON_POSITION_BOTTOM);
	print_button_flag_if(fd, device, "Touchstrip", WACOM_BUTTON_TOUCHSTRIP_MODESWITCH);
	print_button_flag_if(fd, device, "Touchstrip2", WACOM_BUTTON_TOUCHSTRIP2_MODESWITCH);
	print_button_flag_if(fd, device, "OLEDs", WACOM_BUTTON_OLED);
	print_button_flag_if(fd, device, "Ring", WACOM_BUTTON_RING_MODESWITCH);
	print_button_flag_if(fd, device, "Ring2", WACOM_BUTTON_RING2_MODESWITCH);
	dprintf(fd, "RingNumModes=%d\n", libwacom_get_ring_num_modes(device));
	dprintf(fd, "Ring2NumModes=%d\n", libwacom_get_ring2_num_modes(device));
	dprintf(fd, "StripsNumModes=%d\n", libwacom_get_strips_num_modes(device));

	dprintf(fd, "\n");
}

void
libwacom_print_device_description(int fd, WacomDevice *device)
{
	const WacomMatch **match;
	WacomClass class;
	const char *bus_name, *class_name;

	class  = libwacom_get_class(device);
	switch(class) {
		case WCLASS_UNKNOWN:	class_name = "Unknown";	break;
		case WCLASS_INTUOS3:	class_name = "Intuos3";	break;
		case WCLASS_INTUOS4:	class_name = "Intuos4";	break;
		case WCLASS_INTUOS5:	class_name = "Intuos5";	break;
		case WCLASS_CINTIQ:	class_name = "Cintiq";	break;
		case WCLASS_BAMBOO:	class_name = "Bamboo";	break;
		case WCLASS_GRAPHIRE:	class_name = "Graphire";break;
		case WCLASS_ISDV4:	class_name = "ISDV4";	break;
		case WCLASS_INTUOS:	class_name = "Intuos";	break;
		case WCLASS_INTUOS2:	class_name = "Intuos2";	break;
		case WCLASS_PEN_DISPLAYS:	class_name = "PenDisplay";	break;
		default:		g_assert_not_reached(); break;
	}

	dprintf(fd, "[Device]\n");
	dprintf(fd, "Name=%s\n", libwacom_get_name(device));
	dprintf(fd, "DeviceMatch=");
	for (match = libwacom_get_matches(device); *match; match++) {
		WacomBusType type	= libwacom_match_get_bustype(*match);
		int          vendor     = libwacom_match_get_vendor_id(*match);
		int          product    = libwacom_match_get_product_id(*match);

		switch(type) {
			case WBUSTYPE_BLUETOOTH:	bus_name = "bluetooth";	break;
			case WBUSTYPE_USB:		bus_name = "usb";	break;
			case WBUSTYPE_SERIAL:		bus_name = "serial";	break;
			case WBUSTYPE_UNKNOWN:		bus_name = "unknown";	break;
			default:			g_assert_not_reached(); break;
		}
		dprintf(fd, "%s:%04x:%04x;", bus_name, vendor, product);
	}
	dprintf(fd, "\n");

	dprintf(fd, "Class=%s\n",		class_name);
	dprintf(fd, "Width=%d\n",		libwacom_get_width(device));
	dprintf(fd, "Height=%d\n",		libwacom_get_height(device));
	print_styli_for_device(fd, device);
	dprintf(fd, "\n");

	dprintf(fd, "[Features]\n");
	dprintf(fd, "Reversible=%s\n", libwacom_is_reversible(device)	? "true" : "false");
	dprintf(fd, "Stylus=%s\n",	 libwacom_has_stylus(device)	? "true" : "false");
	dprintf(fd, "Ring=%s\n",	 libwacom_has_ring(device)	? "true" : "false");
	dprintf(fd, "Ring2=%s\n",	 libwacom_has_ring2(device)	? "true" : "false");
	dprintf(fd, "BuiltIn=%s\n",	 libwacom_is_builtin(device)	? "true" : "false");
	dprintf(fd, "Touch=%s\n",	 libwacom_has_touch(device)	? "true" : "false");

	dprintf(fd, "NumStrips=%d\n",	libwacom_get_num_strips(device));
	dprintf(fd, "Buttons=%d\n",		libwacom_get_num_buttons(device));

	print_buttons_for_device(fd, device);
}


void
libwacom_destroy(WacomDevice *device)
{
	int i;

	if (!g_atomic_int_dec_and_test(&device->refcnt))
		return;

	g_free (device->name);

	for (i = 0; i < device->nmatches; i++) {
		g_free (device->matches[i]->match);
		g_free (device->matches[i]);
	}
	g_free (device->matches);
	g_free (device->supported_styli);
	g_free (device->buttons);
	g_free (device);
}

void
libwacom_update_match(WacomDevice *device, WacomBusType bus, int vendor_id, int product_id)
{
	char *newmatch;
	int i;
	WacomMatch match;

	if (bus == WBUSTYPE_UNKNOWN && vendor_id == 0 && product_id == 0)
		newmatch = g_strdup("generic");
	else
		newmatch = make_match_string(bus, vendor_id, product_id);

	match.match = newmatch;
	match.bus = bus;
	match.vendor_id = vendor_id;
	match.product_id = product_id;

	for (i = 0; i < device->nmatches; i++) {
		if (g_strcmp0(libwacom_match_get_match_string(device->matches[i]), newmatch) == 0) {
			device->match = i;
			g_free(newmatch);
			return;
		}
	}

	device->nmatches++;

	device->matches = g_realloc_n(device->matches, device->nmatches + 1, sizeof(WacomMatch));
	device->matches[device->nmatches] = NULL;
	device->matches[device->nmatches - 1] = libwacom_copy_match(&match);
	device->match = device->nmatches - 1;
	g_free(newmatch);
}

int libwacom_get_vendor_id(WacomDevice *device)
{
	g_return_val_if_fail(device->match >= 0, -1);
	g_return_val_if_fail(device->match < device->nmatches, -1);
	return device->matches[device->match]->vendor_id;
}

const char* libwacom_get_name(WacomDevice *device)
{
	return device->name;
}

int libwacom_get_product_id(WacomDevice *device)
{
	g_return_val_if_fail(device->match >= 0, -1);
	g_return_val_if_fail(device->match < device->nmatches, -1);
	return device->matches[device->match]->product_id;
}

const char* libwacom_get_match(WacomDevice *device)
{
	g_return_val_if_fail(device->match >= 0, NULL);
	g_return_val_if_fail(device->match < device->nmatches, NULL);
	return device->matches[device->match]->match;
}

const WacomMatch** libwacom_get_matches(WacomDevice *device)
{
	return (const WacomMatch**)device->matches;
}

int libwacom_get_width(WacomDevice *device)
{
	return device->width;
}

int libwacom_get_height(WacomDevice *device)
{
	return device->height;
}

WacomClass libwacom_get_class(WacomDevice *device)
{
	return device->cls;
}

int libwacom_has_stylus(WacomDevice *device)
{
	return !!(device->features & FEATURE_STYLUS);
}

int libwacom_has_touch(WacomDevice *device)
{
	return !!(device->features & FEATURE_TOUCH);
}

int libwacom_get_num_buttons(WacomDevice *device)
{
	return device->num_buttons;
}

const int *libwacom_get_supported_styli(WacomDevice *device, int *num_styli)
{
	*num_styli = device->num_styli;
	return device->supported_styli;
}

int libwacom_has_ring(WacomDevice *device)
{
	return !!(device->features & FEATURE_RING);
}

int libwacom_has_ring2(WacomDevice *device)
{
	return !!(device->features & FEATURE_RING2);
}

int libwacom_get_ring_num_modes(WacomDevice *device)
{
	return device->ring_num_modes;
}

int libwacom_get_ring2_num_modes(WacomDevice *device)
{
	return device->ring2_num_modes;
}

int libwacom_get_num_strips(WacomDevice *device)
{
	return device->num_strips;
}

int libwacom_get_strips_num_modes(WacomDevice *device)
{
	return device->strips_num_modes;
}

int libwacom_is_builtin(WacomDevice *device)
{
	return !!(device->features & FEATURE_BUILTIN);
}

int libwacom_is_reversible(WacomDevice *device)
{
	return !!(device->features & FEATURE_REVERSIBLE);
}

WacomBusType libwacom_get_bustype(WacomDevice *device)
{
	g_return_val_if_fail(device->match >= 0, -1);
	g_return_val_if_fail(device->match < device->nmatches, -1);
	return device->matches[device->match]->bus;
}

WacomButtonFlags
libwacom_get_button_flag(WacomDevice *device,
		char         button)
{
	int index;

	g_return_val_if_fail (device->num_buttons > 0, WACOM_BUTTON_NONE);
	g_return_val_if_fail (button >= 'A', WACOM_BUTTON_NONE);
	g_return_val_if_fail (button < 'A' + device->num_buttons, WACOM_BUTTON_NONE);

	index = button - 'A';

	return device->buttons[index];
}

const WacomStylus *libwacom_stylus_get_for_id (WacomDeviceDatabase *db, int id)
{
	return g_hash_table_lookup (db->stylus_ht, GINT_TO_POINTER(id));
}

int libwacom_stylus_get_id (const WacomStylus *stylus)
{
	return stylus->id;
}

const char *libwacom_stylus_get_name (const WacomStylus *stylus)
{
	return stylus->name;
}

int libwacom_stylus_get_num_buttons (const WacomStylus *stylus)
{
	if (stylus->num_buttons == -1) {
		g_warning ("Stylus '0x%x' has no number of buttons defined, falling back to 2", stylus->id);
		return 2;
	}
	return stylus->num_buttons;
}

int libwacom_stylus_has_eraser (const WacomStylus *stylus)
{
	return stylus->has_eraser;
}

int libwacom_stylus_is_eraser (const WacomStylus *stylus)
{
	return stylus->is_eraser;
}

int libwacom_stylus_has_lens (const WacomStylus *stylus)
{
	return stylus->has_lens;
}

WacomStylusType libwacom_stylus_get_type (const WacomStylus *stylus)
{
	if (stylus->type == WSTYLUS_UNKNOWN) {
		g_warning ("Stylus '0x%x' has no type defined, falling back to 'General'", stylus->id);
		return WSTYLUS_GENERAL;
	}
	return stylus->type;
}

void
libwacom_print_stylus_description (int fd, const WacomStylus *stylus)
{
	const char *type;

	dprintf(fd, "[%#x]\n",	libwacom_stylus_get_id(stylus));
	dprintf(fd, "Name=%s\n",	libwacom_stylus_get_name(stylus));
	dprintf(fd, "Buttons=%d\n",	libwacom_stylus_get_num_buttons(stylus));
	dprintf(fd, "HasEraser=%s\n", libwacom_stylus_has_eraser(stylus) ? "true" : "false");
	dprintf(fd, "IsEraser=%s\n",	libwacom_stylus_is_eraser(stylus) ? "true" : "false");
	dprintf(fd, "HasLens=%s\n",	libwacom_stylus_has_lens(stylus) ? "true" : "false");

	switch(libwacom_stylus_get_type(stylus)) {
		case WSTYLUS_UNKNOWN:	type = "Unknown";	 break;
		case WSTYLUS_GENERAL:	type = "General";	 break;
		case WSTYLUS_INKING:	type = "Inking";	 break;
		case WSTYLUS_AIRBRUSH:	type = "Airbrush";	 break;
		case WSTYLUS_CLASSIC:	type = "Classic";	 break;
		case WSTYLUS_MARKER:	type = "Marker";	 break;
		case WSTYLUS_STROKE:	type = "Stroke";	 break;
		case WSTYLUS_PUCK:	type = "Puck";		break;
		default:		g_assert_not_reached();	break;
	}

	dprintf(fd, "Type=%s\n", type);
}

void libwacom_stylus_destroy(WacomStylus *stylus)
{
	g_free (stylus->name);
	g_free (stylus);
}


WacomBusType libwacom_match_get_bustype(const WacomMatch *match)
{
	return match->bus;
}

uint32_t libwacom_match_get_product_id(const WacomMatch *match)
{
	return match->product_id;
}

uint32_t libwacom_match_get_vendor_id(const WacomMatch *match)
{
	return match->vendor_id;
}

const char* libwacom_match_get_match_string(const WacomMatch *match)
{
	return match->match;
}

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