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1.1 root 1: /*
2: * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved.
3: *
4: * @APPLE_LICENSE_HEADER_START@
5: *
6: * The contents of this file constitute Original Code as defined in and
7: * are subject to the Apple Public Source License Version 1.1 (the
8: * "License"). You may not use this file except in compliance with the
9: * License. Please obtain a copy of the License at
10: * http://www.apple.com/publicsource and read it before using this file.
11: *
12: * This Original Code and all software distributed under the License are
13: * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
14: * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
15: * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
16: * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
17: * License for the specific language governing rights and limitations
18: * under the License.
19: *
20: * @APPLE_LICENSE_HEADER_END@
21: */
22: /*
23: File: HIDPostProcessRIValue.c
24:
25: Contains: xxx put contents here xxx
26:
27: Version: xxx put version here xxx
28:
29: Copyright: � 1999 by Apple Computer, Inc., all rights reserved.
30:
31: File Ownership:
32:
33: DRI: xxx put dri here xxx
34:
35: Other Contact: xxx put other contact here xxx
36:
37: Technology: xxx put technology here xxx
38:
39: Writers:
40:
41: (BWS) Brent Schorsch
42:
43: Change History (most recent first):
44:
45: <USB1> 4/7/99 BWS first checked in
46: */
47:
48: #include "HIDLib.h"
49:
50: /*
51: *------------------------------------------------------------------------------
52: *
53: * HIDPostProcessRIValue - performs any post-processing necessary for data
54: * retrieved _from_ a report for the specified report
55: * item. Currently, the only post-processing done
56: * is reversing when appropriate
57: *
58: * Input:
59: * reportItem - The report item
60: * value - the value, from HIDGetData
61: * Output:
62: * value - The processed value
63: * Returns:
64: * kHIDSuccess - Success
65: *
66: *------------------------------------------------------------------------------
67: */
68:
69: OSStatus HIDPostProcessRIValue (HIDReportItem * reportItem,
70: SInt32 * value)
71: {
72:
73: // if isReversed, returnValue = ((min - returnValue) + max)
74: if (reportItem->flags & kHIDReportItemFlag_Reversed)
75: *value = ((reportItem->globals.logicalMinimum - (*value)) +
76: reportItem->globals.logicalMaximum);
77:
78: return kHIDSuccess;
79: }
80:
81: /*
82: *------------------------------------------------------------------------------
83: *
84: * HIDPreProcessRIValue - performs any pre-processing necessary for data
85: * ouput _to_ a report for the specified report
86: * item. Currently, the only pre-processing done
87: * is reversing when appropriate
88: *
89: * Input:
90: * reportItem - The report item
91: * value - the value, destined for HIDPutData
92: * Output:
93: * value - The processed value
94: * Returns:
95: * kHIDSuccess - Success
96: *
97: *------------------------------------------------------------------------------
98: */
99:
100: OSStatus HIDPreProcessRIValue (HIDReportItem * reportItem,
101: SInt32 * value)
102: {
103:
104: // if isReversed, returnValue = ((min - returnValue) + max)
105: if (reportItem->flags & kHIDReportItemFlag_Reversed)
106: *value = ((reportItem->globals.logicalMinimum - (*value)) +
107: reportItem->globals.logicalMaximum);
108:
109: return kHIDSuccess;
110: }
111:
112:
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