1 files changed, 143 insertions, 0 deletions
diff --git a/lib/libusbhid/data.c b/lib/libusbhid/data.c
new file mode 100644
index 0000000..f607737
--- /dev/null
+++ b/lib/libusbhid/data.c
@@ -0,0 +1,143 @@
+/*	$NetBSD: data.c,v 1.8 2000/04/02 11:10:53 augustss Exp $	*/
+
+/*
+ * Copyright (c) 1999 Lennart Augustsson <augustss@netbsd.org>
+ * All rights reserved.
+ *
+ * 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. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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 <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <assert.h>
+#include <stdlib.h>
+#include <string.h>
+#include <dev/usb/usb_ioctl.h>
+#include "usbhid.h"
+#include "usbvar.h"
+
+int32_t
+hid_get_data(const void *p, const hid_item_t *h)
+{
+	const uint8_t *buf;
+	uint32_t hpos;
+	uint32_t hsize;
+	uint32_t data;
+	int i, end, offs;
+
+	buf = p;
+
+	/* Skip report ID byte. */
+	if (h->report_ID > 0)
+		buf++;
+
+	hpos = h->pos;			/* bit position of data */
+	hsize = h->report_size;		/* bit length of data */
+
+	/* Range check and limit */
+	if (hsize == 0)
+		return (0);
+	if (hsize > 32)
+		hsize = 32;
+
+	offs = hpos / 8;
+	end = (hpos + hsize) / 8 - offs;
+	data = 0;
+	for (i = 0; i <= end; i++)
+		data |= buf[offs + i] << (i*8);
+
+	/* Correctly shift down data */
+	data >>= hpos % 8;
+	hsize = 32 - hsize;
+
+	/* Mask and sign extend in one */
+	if ((h->logical_minimum < 0) || (h->logical_maximum < 0))
+		data = (int32_t)((int32_t)data << hsize) >> hsize;
+	else
+		data = (uint32_t)((uint32_t)data << hsize) >> hsize;
+
+	return (data);
+}
+
+void
+hid_set_data(void *p, const hid_item_t *h, int32_t data)
+{
+	uint8_t *buf;
+	uint32_t hpos;
+	uint32_t hsize;
+	uint32_t mask;
+	int i;
+	int end;
+	int offs;
+
+	buf = p;
+
+	/* Set report ID byte. */
+	if (h->report_ID > 0)
+		*buf++ = h->report_ID & 0xff;
+
+	hpos = h->pos;			/* bit position of data */
+	hsize = h->report_size;		/* bit length of data */
+
+	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;
+
+	for (i = 0; i <= end; i++)
+		buf[offs + i] = (buf[offs + i] & (mask >> (i*8))) |
+		    ((data >> (i*8)) & 0xff);
+}
+
+int
+hid_get_report(int fd, enum hid_kind k, unsigned char *data, unsigned int size)
+{
+	struct usb_gen_descriptor ugd;
+
+	memset(&ugd, 0, sizeof(ugd));
+	ugd.ugd_data = hid_pass_ptr(data);
+	ugd.ugd_maxlen = size;
+	ugd.ugd_report_type = k + 1;
+	return (ioctl(fd, USB_GET_REPORT, &ugd));
+}
+
+int
+hid_set_report(int fd, enum hid_kind k, unsigned char *data, unsigned int size)
+{
+	struct usb_gen_descriptor ugd;
+
+	memset(&ugd, 0, sizeof(ugd));
+	ugd.ugd_data = hid_pass_ptr(data);
+	ugd.ugd_maxlen = size;
+	ugd.ugd_report_type = k + 1;
+	return (ioctl(fd, USB_SET_REPORT, &ugd));
+}