lib/libusbhid/descr.c

   1 /*      $NetBSD: descr.c,v 1.4 2003/07/26 19:25:08 salo Exp $   */
   2
   3 /*
   4  * Copyright (c) 1999 Lennart Augustsson <augustss@NetBSD.org>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  *
  16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  26  * SUCH DAMAGE.
  27  */
  28
  29 #include <sys/cdefs.h>
  30 __RCSID("$NetBSD: descr.c,v 1.4 2003/07/26 19:25:08 salo Exp $");
  31
  32 #include <sys/types.h>
  33
  34 #include <assert.h>
  35 #include <errno.h>
  36 #include <stdlib.h>
  37 #include <string.h>
  38 #include <unistd.h>
  39 #include <sys/time.h>
  40
  41 #include <dev/usb/usb.h>
  42
  43 #include "usbhid.h"
  44 #include "usbvar.h"
  45
  46 report_desc_t
  47 hid_get_report_desc(int fd)
  48 {
  49         struct usb_ctl_report_desc rep;
  50
  51         _DIAGASSERT(fd != -1);
  52
  53         rep.ucrd_size = 0;
  54         if (ioctl(fd, USB_GET_REPORT_DESC, &rep) < 0)
  55                 return (NULL);
  56
  57         return hid_use_report_desc(rep.ucrd_data, (unsigned int)rep.ucrd_size);
  58 }
  59
  60 report_desc_t
  61 hid_use_report_desc(const uint8_t *data, unsigned int size)
  62 {
  63         report_desc_t r;
  64
  65         r = malloc(sizeof(*r) + size);
  66         if (r == 0) {
  67                 errno = ENOMEM;
  68                 return (NULL);
  69         }
  70         r->size = size;
  71         memcpy(r->data, data, size);
  72         return (r);
  73 }
  74
  75 void
  76 hid_dispose_report_desc(report_desc_t r)
  77 {
  78
  79         free(r);
  80 }