| data.c (113273) | data.c (205728) |
|---|---|
| 1/* $NetBSD: data.c,v 1.8 2000/04/02 11:10:53 augustss 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 --- 13 unchanged lines hidden (view full) --- 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> | 1/* $NetBSD: data.c,v 1.8 2000/04/02 11:10:53 augustss 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 --- 13 unchanged lines hidden (view full) --- 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__FBSDID("$FreeBSD: head/lib/libusbhid/data.c 113273 2003-04-09 01:52:49Z mdodd $"); | 30__FBSDID("$FreeBSD: head/lib/libusbhid/data.c 205728 2010-03-27 08:00:16Z kaiw $"); |
| 31 | 31 |
| 32#include <sys/param.h> |
|
| 32#include <assert.h> 33#include <stdlib.h> 34#include "usbhid.h" 35 36int 37hid_get_data(const void *p, const hid_item_t *h) 38{ | 33#include <assert.h> 34#include <stdlib.h> 35#include "usbhid.h" 36 37int 38hid_get_data(const void *p, const hid_item_t *h) 39{ |
| 39 const unsigned char *buf; 40 unsigned int hpos; 41 unsigned int hsize; 42 int data; | 40 const uint8_t *buf; 41 uint32_t hpos; 42 uint32_t hsize; 43 uint32_t data; |
| 43 int i, end, offs; 44 45 buf = p; | 44 int i, end, offs; 45 46 buf = p; |
| 47 48 /* Skip report ID byte. */ 49 if (h->report_ID > 0) 50 buf++; 51 |
|
| 46 hpos = h->pos; /* bit position of data */ 47 hsize = h->report_size; /* bit length of data */ 48 | 52 hpos = h->pos; /* bit position of data */ 53 hsize = h->report_size; /* bit length of data */ 54 |
| 55 /* Range check and limit */ |
|
| 49 if (hsize == 0) 50 return (0); | 56 if (hsize == 0) 57 return (0); |
| 58 if (hsize > 32) 59 hsize = 32; 60 |
|
| 51 offs = hpos / 8; 52 end = (hpos + hsize) / 8 - offs; 53 data = 0; 54 for (i = 0; i <= end; i++) 55 data |= buf[offs + i] << (i*8); 56 data >>= hpos % 8; 57 data &= (1 << hsize) - 1; 58 if (h->logical_minimum < 0) { 59 /* Need to sign extend */ 60 hsize = sizeof data * 8 - hsize; 61 data = (data << hsize) >> hsize; 62 } 63 return (data); 64} 65 66void 67hid_set_data(void *p, const hid_item_t *h, int data) 68{ | 61 offs = hpos / 8; 62 end = (hpos + hsize) / 8 - offs; 63 data = 0; 64 for (i = 0; i <= end; i++) 65 data |= buf[offs + i] << (i*8); 66 data >>= hpos % 8; 67 data &= (1 << hsize) - 1; 68 if (h->logical_minimum < 0) { 69 /* Need to sign extend */ 70 hsize = sizeof data * 8 - hsize; 71 data = (data << hsize) >> hsize; 72 } 73 return (data); 74} 75 76void 77hid_set_data(void *p, const hid_item_t *h, int data) 78{ |
| 69 unsigned char *buf; 70 unsigned int hpos; 71 unsigned int hsize; | 79 uint8_t *buf; 80 uint32_t hpos; 81 uint32_t hsize; |
| 72 int i, end, offs, mask; 73 74 buf = p; | 82 int i, end, offs, mask; 83 84 buf = p; |
| 85 86 /* Set report ID byte. */ 87 if (h->report_ID > 0) 88 *buf++ = h->report_ID & 0xff; 89 |
|
| 75 hpos = h->pos; /* bit position of data */ 76 hsize = h->report_size; /* bit length of data */ 77 78 if (hsize != 32) { 79 mask = (1 << hsize) - 1; 80 data &= mask; 81 } else 82 mask = ~0; 83 84 data <<= (hpos % 8); 85 mask <<= (hpos % 8); 86 mask = ~mask; 87 88 offs = hpos / 8; 89 end = (hpos + hsize) / 8 - offs; 90 91 for (i = 0; i <= end; i++) 92 buf[offs + i] = (buf[offs + i] & (mask >> (i*8))) | | 90 hpos = h->pos; /* bit position of data */ 91 hsize = h->report_size; /* bit length of data */ 92 93 if (hsize != 32) { 94 mask = (1 << hsize) - 1; 95 data &= mask; 96 } else 97 mask = ~0; 98 99 data <<= (hpos % 8); 100 mask <<= (hpos % 8); 101 mask = ~mask; 102 103 offs = hpos / 8; 104 end = (hpos + hsize) / 8 - offs; 105 106 for (i = 0; i <= end; i++) 107 buf[offs + i] = (buf[offs + i] & (mask >> (i*8))) | |
| 93 ((data >> (i*8)) & 0xff); | 108 ((data >> (i*8)) & 0xff); |
| 94} | 109} |