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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: HIDProcessCollection.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> 3/5/99 BWS first checked in
46: */
47:
48: #include "HIDLib.h"
49:
50: /*
51: *------------------------------------------------------------------------------
52: *
53: * HIDProcessCollection - Process a Collection MainItem
54: *
55: * Input:
56: * ptDescriptor - The Descriptor Structure
57: * ptPreparsedData - The PreParsedData Structure
58: * Output:
59: * ptDescriptor - The Descriptor Structure
60: * ptPreparsedData - The PreParsedData Structure
61: * Returns:
62: * kHIDSuccess - Success
63: * kHIDNullPointerErr - Argument, Pointer was Null
64: *
65: *------------------------------------------------------------------------------
66: */
67: OSStatus HIDProcessCollection(HIDReportDescriptor *ptDescriptor, HIDPreparsedDataPtr ptPreparsedData)
68: {
69: HIDCollection *collections;
70: HIDCollection *ptCollection;
71: int parent;
72: int iCollection;
73: /*
74: * Disallow NULL Pointers
75: */
76: if ((ptDescriptor == NULL) || (ptPreparsedData == NULL))
77: return kHIDNullPointerErr;
78: /*
79: * Initialize the new Collection Structure
80: */
81: iCollection = ptPreparsedData->collectionCount++;
82: collections = ptPreparsedData->collections;
83: ptCollection = &collections[iCollection];
84: ptCollection->data = ptDescriptor->item.unsignedValue;
85: ptCollection->firstUsageItem = ptDescriptor->firstUsageItem;
86: ptCollection->usageItemCount = ptPreparsedData->usageItemCount - ptDescriptor->firstUsageItem;
87: ptDescriptor->firstUsageItem = ptPreparsedData->usageItemCount;
88: ptCollection->children = 0;
89: ptCollection->nextSibling = ptDescriptor->sibling;
90: ptDescriptor->sibling = 0;
91: ptCollection->firstChild = 0;
92: ptCollection->usagePage = ptDescriptor->globals.usagePage;
93: ptCollection->firstReportItem = ptPreparsedData->reportItemCount;
94: /*
95: * Set up the relationship with the parent Collection
96: */
97: parent = ptDescriptor->parent;
98: ptCollection->parent = parent;
99: collections[parent].firstChild = iCollection;
100: collections[parent].children++;
101: ptDescriptor->parent = iCollection;
102: /*
103: * Save the parent Collection Information on the stack
104: */
105: ptDescriptor->collectionStack[ptDescriptor->collectionNesting++] = parent;
106: return kHIDSuccess;
107: }
108:
109: /*
110: *------------------------------------------------------------------------------
111: *
112: * HIDProcessEndCollection - Process an EndCollection MainItem
113: *
114: * Input:
115: * ptDescriptor - The Descriptor Structure
116: * ptPreparsedData - The PreParsedData Structure
117: * Output:
118: * ptPreparsedData - The PreParsedData Structure
119: * Returns:
120: * kHIDSuccess - Success
121: * kHIDNullPointerErr - Argument, Pointer was Null
122: *
123: *------------------------------------------------------------------------------
124: */
125: OSStatus HIDProcessEndCollection(HIDReportDescriptor *ptDescriptor, HIDPreparsedDataPtr ptPreparsedData)
126: {
127: HIDCollection *ptCollection;
128: int iCollection;
129: /*
130: * Remember the number of ReportItem MainItems in this Collection
131: */
132: ptCollection = &ptPreparsedData->collections[ptDescriptor->parent];
133: ptCollection->reportItemCount = ptPreparsedData->reportItemCount - ptCollection->firstReportItem;
134: /*
135: * Restore the parent Collection Data
136: */
137: iCollection = ptDescriptor->collectionStack[--ptDescriptor->collectionNesting];
138: ptDescriptor->sibling = ptDescriptor->parent;
139: ptDescriptor->parent = iCollection;
140: return kHIDSuccess;
141: }
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