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authoraugustss <augustss@NetBSD.org>1999-05-11 21:02:24 +0000
committeraugustss <augustss@NetBSD.org>1999-05-11 21:02:24 +0000
commit18f11488db9780b3c871d8eae0d124f4d8f3d99b (patch)
tree32f4c9ef2f52496291871eabf2bf9a802117117c /lib/libusb/data.c
parentdfa799a037ad9f000cb03e8226e9d481ea27ff53 (diff)
Make USB HID processing into a library.
Diffstat (limited to 'lib/libusb/data.c')
-rw-r--r--lib/libusb/data.c59
1 files changed, 59 insertions, 0 deletions
diff --git a/lib/libusb/data.c b/lib/libusb/data.c
new file mode 100644
index 00000000000..3b78d0fc94b
--- /dev/null
+++ b/lib/libusb/data.c
@@ -0,0 +1,59 @@
+/* $NetBSD: data.c,v 1.1 1999/05/11 21:02:24 augustss Exp $ */
+
+/*
+ * Copyright (c) 1999 The NetBSD Foundation, Inc.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to The NetBSD Foundation
+ * by Lennart Augustsson (augustss@netbsd.org).
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Neither the name of The NetBSD Foundation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
+ * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <stdlib.h>
+#include "usb.h"
+
+unsigned int
+getdata(void *p, hid_item_t *h)
+{
+ unsigned char *buf = p;
+ unsigned int hpos = h->pos; /* bit position of data */
+ unsigned int hsize = h->report_size; /* bit length of data */
+ unsigned int data;
+ int i, end, offs;
+
+ if (hsize == 0)
+ return (0);
+ offs = hpos / 8;
+ end = (hpos + hsize) / 8 - offs;
+ data = 0;
+ for (i = 0; i <= end; i++)
+ data |= buf[offs + i] << (i*8);
+ data >>= hpos % 8;
+ data &= (1 << hsize) - 1;
+ if (h->logical_minimum < 0) {
+ /* Need to sign extend */
+ hsize = sizeof data * 8 - hsize;
+ data = ((int)data << hsize) >> hsize;
+ }
+ return (data);
+}