Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Allow setting data without clearing it first. From Dave Sainty <dave@dtsp.co.nz>

Browse Source
This commit is contained in:
augustss 2000-04-02 11:02:21 +00:00
parent 2effe6c79a
commit 1e5140923a
1 changed files with 13 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
lib/libusb/data.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: data.c,v 1.6 1999/09/20 04:48:12 lukem Exp $ */
/* $NetBSD: data.c,v 1.7 2000/04/02 11:02:21 augustss Exp $ */
/*
* Copyright (c) 1999 Lennart Augustsson <augustss@netbsd.org>
@ -69,7 +69,7 @@ hid_set_data(void *p, hid_item_t *h, int data)
unsigned char *buf;
unsigned int hpos;
unsigned int hsize;
int i, end, offs;
int i, end, offs, mask;
_DIAGASSERT(p != NULL);
_DIAGASSERT(h != NULL);
@ -78,13 +78,20 @@ hid_set_data(void *p, hid_item_t *h, int data)
hpos = h->pos; /* bit position of data */
hsize = h->report_size; /* bit length of data */
if (hsize != 32)
data &= (1 << hsize) - 1;
if (hsize != 32) {
mask = (1 << hsize) - 1;
data &= mask;
} else
mask = ~0;
data <<= (hpos % 8);
mask <<= (hpos % 8);
mask = ~mask;
offs = hpos / 8;
end = (hpos + hsize) / 8 - offs;
data = 0;
for (i = 0; i <= end; i++)
buf[offs + i] |= (data >> (i*8)) & 0xff;
buf[offs + i] = (buf[offs + i] & (mask >> (i*8))) |
((data >> (i*8)) & 0xff);
}