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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 | /* * Copyright (c) 1998-2000 Apple Computer, Inc. All rights reserved. * * @APPLE_LICENSE_HEADER_START@ * * The contents of this file constitute Original Code as defined in and * are subject to the Apple Public Source License Version 1.1 (the * "License"). You may not use this file except in compliance with the * License. Please obtain a copy of the License at * http://www.apple.com/publicsource and read it before using this file. * * This Original Code and all software distributed under the License are * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES, * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the * License for the specific language governing rights and limitations * under the License. * * @APPLE_LICENSE_HEADER_END@ */ /* File: HIDOpenCloseDescriptor.c Contains: xxx put contents here xxx Version: xxx put version here xxx Copyright: © 1999 by Apple Computer, Inc., all rights reserved. File Ownership: DRI: xxx put dri here xxx Other Contact: xxx put other contact here xxx Technology: xxx put technology here xxx Writers: (BWS) Brent Schorsch Change History (most recent first): <USB2> 3/17/99 BWS [2314839] Added flags field to HIDPreparsedData which is set in new parameter to HIDOpenReportDescriptor <USB1> 3/5/99 BWS first checked in */ #include "HIDLib.h" //#include <stdlib.h> /* *------------------------------------------------------------------------------ * * HIDCloseReportDescriptor - Close the Descriptor * * Input: * ptPreparsedData - The PreParsedData Structure * Output: * ptPreparsedData - The PreParsedData Structure * Returns: * kHIDSuccess - Success * kHIDNullPointerErr - Argument, Pointer was Null * *------------------------------------------------------------------------------ */ OSStatus HIDCloseReportDescriptor(HIDPreparsedDataRef preparsedDataRef) { HIDPreparsedDataPtr ptPreparsedData = (HIDPreparsedDataPtr) preparsedDataRef; OSStatus iStatus; /* * Disallow NULL Pointers */ if (ptPreparsedData == NULL) return kHIDNullPointerErr; /* * If it's marked closed then don't do anything */ if (ptPreparsedData->hidTypeIfValid != kHIDOSType) return kHIDInvalidPreparsedDataErr; /* * Free any memory that was allocated */ if (ptPreparsedData->rawMemPtr != NULL) { PoolDeallocate (ptPreparsedData->rawMemPtr, ptPreparsedData->numBytesAllocated); ptPreparsedData->rawMemPtr = NULL; } /* * Mark closed */ ptPreparsedData->hidTypeIfValid = 0; /* * Deallocate the preparsed data */ iStatus = PoolDeallocate (ptPreparsedData, sizeof(HIDPreparsedData)); return iStatus; } /* *------------------------------------------------------------------------------ * * HIDOpenReportDescriptor - Initialize the HID Parser * * Input: * psHidReportDescriptor - The HID Report Descriptor (String) * descriptorLength - Length of the Descriptor in bytes * ptPreparsedData - The PreParsedData Structure * Output: * ptPreparsedData - The PreParsedData Structure * Returns: * kHIDSuccess - Success * kHIDNullPointerErr - Argument, Pointer was Null * *------------------------------------------------------------------------------ */ OSStatus HIDOpenReportDescriptor (void * hidReportDescriptor, UInt32 descriptorLength, HIDPreparsedDataRef * preparsedDataRef, UInt32 flags) { HIDPreparsedDataPtr ptPreparsedData = (HIDPreparsedDataPtr) preparsedDataRef; OSStatus iStatus; HIDReportDescriptor tDescriptor; /* * Disallow NULL Pointers */ if ((hidReportDescriptor == NULL) || (preparsedDataRef == NULL)) return kHIDNullPointerErr; /* * Initialize the return result, and allocate space for preparsed data */ *preparsedDataRef = NULL; ptPreparsedData = PoolAllocateResident (sizeof (HIDPreparsedData), kShouldClearMem); /* * Make sure we got the memory */ if (ptPreparsedData == NULL) return kHIDNotEnoughMemoryErr; /* * Copy the flags field */ ptPreparsedData->flags = flags; /* * Initialize the memory allocation pointer */ ptPreparsedData->rawMemPtr = NULL; /* * Set up the descriptor structure */ tDescriptor.descriptor = hidReportDescriptor; tDescriptor.descriptorLength = descriptorLength; /* * Count various items in the descriptor * allocate space within the PreparsedData structure * and initialize the counters there */ iStatus = HIDCountDescriptorItems(&tDescriptor,ptPreparsedData); if (iStatus != kHIDSuccess) return iStatus; /* * Parse the Descriptor * filling in the structures in the PreparsedData structure */ iStatus = HIDParseDescriptor(&tDescriptor,ptPreparsedData); /* * Mark the PreparsedData initialized, maybe */ if (iStatus == kHIDSuccess && ptPreparsedData->rawMemPtr != NULL) { ptPreparsedData->hidTypeIfValid = kHIDOSType; *preparsedDataRef = (HIDPreparsedDataRef) ptPreparsedData; } else // something failed, deallocate everything, and make sure we return an error { if (ptPreparsedData->rawMemPtr != NULL) PoolDeallocate (ptPreparsedData->rawMemPtr, ptPreparsedData->numBytesAllocated); PoolDeallocate (ptPreparsedData, sizeof(HIDPreparsedData)); if (iStatus == kHIDSuccess) iStatus = kHIDNotEnoughMemoryErr; } return iStatus; } |