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/*
Copyright (c) 2021-2022 by Rajaram Regupathy, rajaram.regupathy@gmail.com
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 of the License.
This program is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
(See the full license text in the LICENSES directory)
*/
// SPDX-License-Identifier: GPL-2.0-only
/*
* Code based on usbutils: https://github.com/gregkh/usbutils
*/
#include <libudev.h>
#include <string.h>
#include <stdio.h>
static struct udev *udev = NULL;
static struct udev_hwdb *hwdb = NULL;
int names_init(void)
{
udev = udev_new();
if (udev == NULL)
{
return -1;
}
hwdb = udev_hwdb_new(udev);
if (hwdb == NULL)
{
return -1;
}
return 0;
}
void names_exit(void)
{
hwdb = udev_hwdb_unref(hwdb);
udev = udev_unref(udev);
}
static const char *hwdb_get(const char *modalias, const char *key)
{
struct udev_list_entry *entry;
udev_list_entry_foreach(entry, udev_hwdb_get_properties_list_entry(hwdb, modalias, 0))
{
if (strcmp(udev_list_entry_get_name(entry), key) == 0)
{
return udev_list_entry_get_value(entry);
}
}
return NULL;
}
const char *names_vendor(u_int16_t vendorid)
{
char modalias[64];
sprintf(modalias, "usb:v%04X*", vendorid);
return hwdb_get(modalias, "ID_VENDOR_FROM_DATABASE");
}
const char *names_product(u_int16_t vendorid, u_int16_t productid)
{
char modalias[64];
sprintf(modalias, "usb:v%04Xp%04X*", vendorid, productid);
return hwdb_get(modalias, "ID_MODEL_FROM_DATABASE");
}
int get_vendor_string(char *buf, size_t size, u_int16_t vid)
{
const char *cp;
if (size < 1)
return 0;
*buf = 0;
if (!(cp = names_vendor(vid)))
return 0;
return snprintf(buf, size, "%s", cp);
}
int get_product_string(char *buf, size_t size, u_int16_t vid, u_int16_t pid)
{
const char *cp;
if (size < 1)
return 0;
*buf = 0;
if (!(cp = names_product(vid, pid)))
return 0;
return snprintf(buf, size, "%s", cp);
}
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