diff options
Diffstat (limited to 'lib/dev_list.c')
| -rw-r--r-- | lib/dev_list.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/lib/dev_list.c b/lib/dev_list.c new file mode 100644 index 0000000..3318b4f --- /dev/null +++ b/lib/dev_list.c @@ -0,0 +1,151 @@ +/** @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/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 vendor, uint16_t product, + 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 != 0 && libusb_get_bus_number(lusb_dev) != bus_num) || + (dev_addr != 0 && libusb_get_device_address(lusb_dev) != dev_addr)) + continue; + + /* Skip devices not matching vendor/product mask */ + if (vendor != 0 || product != 0) + { + err = libusb_get_device_descriptor(lusb_dev, &desc); + if (err != LIBUSB_SUCCESS) + goto cleanup; + + if ((vendor != 0 && vendor != desc.idVendor) || + (product != 0 && product != 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; +} + + |