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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: HIDSetUsageValueArray.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: <USB3> 11/1/99 BWS [2405720] We need a better check for 'bit padding' items, ! 46: rather than just is constant. We will check to make sure the ! 47: item is constant, and has no usage, or zero usage. This means we ! 48: need to pass an additional parameter to some internal functions ! 49: <USB2> 4/7/99 BWS Add support for reversed report items ! 50: <USB1> 3/5/99 BWS first checked in ! 51: */ ! 52: ! 53: #include "HIDLib.h" ! 54: ! 55: /* ! 56: *------------------------------------------------------------------------------ ! 57: * ! 58: * HIDSetUsageValueArray - Set the values for a usage ! 59: * ! 60: * Input: ! 61: * reportType - HIDP_Input, HIDP_Output, HIDP_Feature ! 62: * usagePage - Page Criteria ! 63: * iCollection - Collection Criteria or zero ! 64: * usage - usage Criteria ! 65: * psBuffer - Pointer to usage Buffer ! 66: * iByteLength - Length of usage Buffer ! 67: * ptPreparsedData - Pre-Parsed Data ! 68: * psReport - An HID Report ! 69: * iReportLength - The length of the Report ! 70: * Output: ! 71: * piValue - Pointer to usage Value ! 72: * Returns: ! 73: * ! 74: *------------------------------------------------------------------------------ ! 75: */ ! 76: OSStatus HIDSetUsageValueArray(HIDReportType reportType, ! 77: HIDUsage usagePage, ! 78: UInt32 iCollection, ! 79: HIDUsage usage, ! 80: UInt8 *psUsageBuffer, ! 81: UInt32 iByteLength, ! 82: HIDPreparsedDataRef preparsedDataRef, ! 83: void *psReport, ! 84: UInt32 iReportLength) ! 85: { ! 86: HIDPreparsedDataPtr ptPreparsedData = (HIDPreparsedDataPtr) preparsedDataRef; ! 87: HIDCollection *ptCollection; ! 88: HIDReportItem *ptReportItem; ! 89: OSStatus iStatus; ! 90: int i; ! 91: int iR; ! 92: long iValue; ! 93: int iStart; ! 94: int iReportItem; ! 95: UInt32 iUsageIndex; ! 96: UInt32 iCount; ! 97: int byteCount; ! 98: Boolean bIncompatibleReport = false; ! 99: /* ! 100: * Disallow Null Pointers ! 101: */ ! 102: if ((ptPreparsedData == NULL) ! 103: || (psUsageBuffer == NULL) ! 104: || (psReport == NULL)) ! 105: return kHIDNullPointerErr; ! 106: if (ptPreparsedData->hidTypeIfValid != kHIDOSType) ! 107: return kHIDInvalidPreparsedDataErr; ! 108: /* ! 109: * The Collection must be in range ! 110: */ ! 111: if ((iCollection < 0) || (iCollection >= ptPreparsedData->collectionCount)) ! 112: return kHIDBadParameterErr; ! 113: /* ! 114: * Search only the scope of the Collection specified ! 115: * Go through the ReportItems ! 116: * Filter on ReportType and usagePage ! 117: */ ! 118: ptCollection = &ptPreparsedData->collections[iCollection]; ! 119: for (iR=0; iR<ptCollection->reportItemCount; iR++) ! 120: { ! 121: iReportItem = ptCollection->firstReportItem + iR; ! 122: ptReportItem = &ptPreparsedData->reportItems[iReportItem]; ! 123: if (HIDIsVariable(ptReportItem, preparsedDataRef) ! 124: && HIDHasUsage(preparsedDataRef,ptReportItem,usagePage,usage,&iUsageIndex,&iCount)) ! 125: { ! 126: /* ! 127: * This may be the proper place ! 128: * Let's check for the proper Report ID, Type, and Length ! 129: */ ! 130: iStatus = HIDCheckReport(reportType,preparsedDataRef,ptReportItem, ! 131: psReport,iReportLength); ! 132: /* ! 133: * The Report ID or Type may not match. ! 134: * This may not be an error (yet) ! 135: */ ! 136: if (iStatus == kHIDIncompatibleReportErr) ! 137: bIncompatibleReport = true; ! 138: else if (iStatus != kHIDSuccess) ! 139: return iStatus; ! 140: else ! 141: { ! 142: /* ! 143: * Disallow single count variables ! 144: * Count is set by HasUsage ! 145: */ ! 146: if (iCount <= 1) ! 147: return kHIDNotValueArrayErr; ! 148: /* ! 149: * Write out the data ! 150: */ ! 151: iStart = ptReportItem->startBit + (ptReportItem->globals.reportSize * iUsageIndex); ! 152: byteCount = (ptReportItem->globals.reportSize * iCount + 7)/8; ! 153: if (byteCount > iByteLength) ! 154: byteCount = iByteLength; ! 155: for (i=0; i<byteCount; i++) ! 156: { ! 157: iValue = *psUsageBuffer++; ! 158: iStatus = HIDPreProcessRIValue (ptReportItem, &iValue); ! 159: iStatus = HIDPutData(psReport, iReportLength, iStart, 8, iValue); ! 160: if (iStatus != kHIDSuccess) ! 161: return iStatus; ! 162: iStart += 8; ! 163: } ! 164: return kHIDSuccess; ! 165: } ! 166: } ! 167: } ! 168: if (bIncompatibleReport) ! 169: return kHIDIncompatibleReportErr; ! 170: return kHIDUsageNotFoundErr; ! 171: }
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