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/** @file
* @brief usbhid-dump - device list
*
* Copyright (C) 2010 Nikolai Kondrashov
*
* This file is part of usbhid-dump.
*
* Usbhid-dump 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; either version 2 of the License, or
* (at your option) any later version.
*
* Usbhid-dump is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with usbhid-dump; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*
* @author Nikolai Kondrashov <spbnick@gmail.com>
*
* @(#) $Id$
*/
#include "uhd/misc.h"
#include "uhd/dev_list.h"
#include <assert.h>
#include <stdlib.h>
#include <stdio.h>
bool
uhd_dev_list_valid(const uhd_dev *list)
{
UHD_DEV_LIST_FOR_EACH(list, list)
if (!uhd_dev_valid(list))
return false;
return true;
}
size_t
uhd_dev_list_len(const uhd_dev *list)
{
size_t len = 0;
UHD_DEV_LIST_FOR_EACH(list, list)
len++;
return len;
}
void
uhd_dev_list_close(uhd_dev *list)
{
uhd_dev *next;
for (; list != NULL; list = next)
{
next = list->next;
uhd_dev_close(list);
}
}
enum libusb_error
uhd_dev_list_open(libusb_context *ctx,
uint8_t bus_num, uint8_t dev_addr,
uint16_t vid, uint16_t pid,
uhd_dev **plist)
{
enum libusb_error err = LIBUSB_ERROR_OTHER;
libusb_device **lusb_list = NULL;
ssize_t num;
ssize_t idx;
libusb_device *lusb_dev;
struct libusb_device_descriptor desc;
uhd_dev *list = NULL;
uhd_dev *dev;
assert(ctx != NULL);
/* Retrieve libusb device list */
num = libusb_get_device_list(ctx, &lusb_list);
if (num == LIBUSB_ERROR_NO_MEM)
{
err = num;
goto cleanup;
}
/* Find and open the devices */
for (idx = 0; idx < num; idx++)
{
lusb_dev = lusb_list[idx];
/* Skip devices not matching bus_num/dev_addr mask */
if ((bus_num != UHD_BUS_NUM_ANY &&
libusb_get_bus_number(lusb_dev) != bus_num) ||
(dev_addr != UHD_DEV_ADDR_ANY &&
libusb_get_device_address(lusb_dev) != dev_addr))
continue;
/* Skip devices not matching vendor/product mask */
if (vid != UHD_VID_ANY || pid != UHD_PID_ANY)
{
err = libusb_get_device_descriptor(lusb_dev, &desc);
if (err != LIBUSB_SUCCESS)
goto cleanup;
if ((vid != UHD_VID_ANY && vid != desc.idVendor) ||
(pid != UHD_PID_ANY && pid != desc.idProduct))
continue;
}
/* Open and append the device to the list */
err = uhd_dev_open(lusb_dev, &dev);
if (err != LIBUSB_SUCCESS)
goto cleanup;
dev->next = list;
list = dev;
}
/* Free the libusb device list freeing unused devices */
libusb_free_device_list(lusb_list, true);
lusb_list = NULL;
/* Output device list, if requested */
assert(uhd_dev_list_valid(list));
if (plist != NULL)
{
*plist = list;
list = NULL;
}
/* Done! */
err = LIBUSB_SUCCESS;
cleanup:
/* Close the device list if not output */
uhd_dev_list_close(list);
/* Free the libusb device list along with devices */
if (lusb_list != NULL)
libusb_free_device_list(lusb_list, true);
return err;
}
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