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132 lines
3.6 KiB
132 lines
3.6 KiB
//
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// REGEVAL.C
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//
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// Copyright (C) Microsoft Corporation, 1995
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//
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// Implementation of RegEnumValue and supporting functions.
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//
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#include "pch.h"
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//
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// RgLookupValueByIndex
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//
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// Searches for the value with the specified index and returns a pointer to its
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// VALUE_RECORD.
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//
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int
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INTERNAL
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RgLookupValueByIndex(
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HKEY hKey,
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UINT Index,
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LPVALUE_RECORD FAR* lplpValueRecord
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)
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{
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int ErrorCode;
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LPKEY_RECORD lpKeyRecord;
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LPVALUE_RECORD lpValueRecord;
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// Handle Win95 registries that don't have a key record for the root key.
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if (IsNullBlockIndex(hKey-> BlockIndex))
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return ERROR_NO_MORE_ITEMS;
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if ((ErrorCode = RgLockKeyRecord(hKey-> lpFileInfo, hKey-> BlockIndex,
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hKey-> KeyRecordIndex, &lpKeyRecord)) == ERROR_SUCCESS) {
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if (Index >= lpKeyRecord-> ValueCount) {
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RgUnlockDatablock(hKey-> lpFileInfo, hKey-> BlockIndex, FALSE);
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ErrorCode = ERROR_NO_MORE_ITEMS;
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}
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else {
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lpValueRecord = (LPVALUE_RECORD) ((LPBYTE) &lpKeyRecord-> Name +
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lpKeyRecord-> NameLength + lpKeyRecord-> ClassLength);
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while (Index--) {
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lpValueRecord = (LPVALUE_RECORD) ((LPBYTE) &lpValueRecord->
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Name + lpValueRecord-> NameLength + lpValueRecord->
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DataLength);
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}
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*lplpValueRecord = lpValueRecord;
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ErrorCode = ERROR_SUCCESS;
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}
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}
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return ErrorCode;
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}
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//
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// VMMRegEnumValue
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//
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// See Win32 documentation for a description of the behavior.
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//
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LONG
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REGAPI
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VMMRegEnumValue(
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HKEY hKey,
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DWORD Index,
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LPSTR lpValueName,
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LPDWORD lpcbValueName,
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LPDWORD lpReserved,
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LPDWORD lpType,
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LPBYTE lpData,
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LPDWORD lpcbData
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)
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{
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int ErrorCode;
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LPVALUE_RECORD lpValueRecord;
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if (IsBadHugeWritePtr(lpcbValueName, sizeof(DWORD)) ||
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IsBadHugeWritePtr(lpValueName, *lpcbValueName) ||
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(IsBadHugeOptionalWritePtr(lpType, sizeof(DWORD))))
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return ERROR_INVALID_PARAMETER;
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if (IsBadHugeOptionalWritePtr(lpType, sizeof(DWORD)))
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return ERROR_INVALID_PARAMETER;
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if (IsNullPtr(lpcbData)) {
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if (!IsNullPtr(lpData))
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return ERROR_INVALID_PARAMETER;
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}
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else {
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// Win95 compatibility: don't validate lpData is of size *lpcbData.
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// Instead of validating the entire buffer, we'll validate just the
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// required buffer length in RgCopyFromValueRecord.
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if (IsBadHugeWritePtr(lpcbData, sizeof(DWORD)))
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return ERROR_INVALID_PARAMETER;
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}
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if (IsEnumIndexTooBig(Index))
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return ERROR_NO_MORE_ITEMS;
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if (!RgLockRegistry())
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return ERROR_LOCK_FAILED;
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if ((ErrorCode = RgValidateAndConvertKeyHandle(&hKey)) == ERROR_SUCCESS) {
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if ((ErrorCode = RgLookupValueByIndex(hKey, (UINT) Index,
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&lpValueRecord)) == ERROR_SUCCESS) {
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ErrorCode = RgCopyFromValueRecord(hKey, lpValueRecord, lpValueName,
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lpcbValueName, lpType, lpData, lpcbData);
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RgUnlockDatablock(hKey-> lpFileInfo, hKey-> BlockIndex, FALSE);
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}
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}
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RgUnlockRegistry();
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return ErrorCode;
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UNREFERENCED_PARAMETER(lpReserved);
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}
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