170 lines
4 KiB
C
170 lines
4 KiB
C
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//
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// REGQKEY.C
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//
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// Copyright (C) Microsoft Corporation, 1995
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//
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// Implementation of RegQueryInfoKey.
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//
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#include "pch.h"
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//
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// VMMRegQueryInfoKey
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//
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// See Win32 documentation of RegQueryInfoKey. When VXD is defined, this
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// function does not take all of the parameters that we end up ignoring anyway
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// (class, security, timestamp parameters).
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//
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#ifdef VXD
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LONG
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REGAPI
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VMMRegQueryInfoKey(
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HKEY hKey,
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LPDWORD lpcSubKeys,
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LPDWORD lpcbMaxSubKeyLen,
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LPDWORD lpcValues,
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LPDWORD lpcbMaxValueName,
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LPDWORD lpcbMaxValueData
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)
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#else
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LONG
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REGAPI
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VMMRegQueryInfoKey(
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HKEY hKey,
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LPSTR lpClass,
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LPDWORD lpcbClass,
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LPDWORD lpReserved,
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LPDWORD lpcSubKeys,
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LPDWORD lpcbMaxSubKeyLen,
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LPDWORD lpcbMaxClassLen,
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LPDWORD lpcValues,
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LPDWORD lpcbMaxValueName,
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LPDWORD lpcbMaxValueData,
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LPVOID lpcbSecurityDescriptor,
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LPVOID lpftLastWriteTime
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)
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#endif
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{
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int ErrorCode;
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LPVALUE_RECORD lpValueRecord;
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UINT cItems;
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DWORD cbValueData;
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DWORD cbMaxValueData;
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DWORD cbStringLen;
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DWORD cbMaxStringLen;
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if (IsBadHugeOptionalWritePtr(lpcSubKeys, sizeof(DWORD)) ||
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IsBadHugeOptionalWritePtr(lpcbMaxSubKeyLen, sizeof(DWORD)) ||
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IsBadHugeOptionalWritePtr(lpcValues, sizeof(DWORD)) ||
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IsBadHugeOptionalWritePtr(lpcbMaxValueName, sizeof(DWORD)) ||
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IsBadHugeOptionalWritePtr(lpcbMaxValueData, sizeof(DWORD)))
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return ERROR_INVALID_PARAMETER;
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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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goto ReturnErrorCode;
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//
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// Compute cValues, cbMaxValueName, and cbMaxValueData.
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//
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if (!IsNullPtr(lpcValues) || !IsNullPtr(lpcbMaxValueName) ||
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!IsNullPtr(lpcbMaxValueData)) {
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cItems = 0;
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cbMaxStringLen = 0;
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cbMaxValueData = 0;
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while ((ErrorCode = RgLookupValueByIndex(hKey, cItems,
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&lpValueRecord)) == ERROR_SUCCESS) {
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cItems++;
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if (lpValueRecord-> NameLength > cbMaxStringLen)
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cbMaxStringLen = lpValueRecord-> NameLength;
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// RgCopyFromValueRecord will handle static and dynamic keys...
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ErrorCode = RgCopyFromValueRecord(hKey, lpValueRecord, NULL, NULL,
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NULL, NULL, &cbValueData);
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RgUnlockDatablock(hKey-> lpFileInfo, hKey-> BlockIndex, FALSE);
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if (ErrorCode != ERROR_SUCCESS)
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goto ReturnErrorCode;
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if (cbValueData > cbMaxValueData)
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cbMaxValueData = cbValueData;
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}
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if (ErrorCode == ERROR_NO_MORE_ITEMS) {
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if (!IsNullPtr(lpcValues))
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*lpcValues = cItems;
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if (!IsNullPtr(lpcbMaxValueName))
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*lpcbMaxValueName = cbMaxStringLen;
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if (!IsNullPtr(lpcbMaxValueData))
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*lpcbMaxValueData = cbMaxValueData;
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ErrorCode = ERROR_SUCCESS;
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}
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}
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//
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// Compute cSubKeys and cbMaxSubKeyLen. Somewhat painful because we must
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// touch each child keynode and datablock.
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//
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if (!IsNullPtr(lpcSubKeys) || !IsNullPtr(lpcbMaxSubKeyLen)) {
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cItems = 0;
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cbMaxStringLen = 0;
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while ((ErrorCode = RgLookupKeyByIndex(hKey, cItems, NULL,
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&cbStringLen)) == ERROR_SUCCESS) {
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cItems++;
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if (cbStringLen > cbMaxStringLen)
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cbMaxStringLen = cbStringLen;
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}
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if (ErrorCode == ERROR_NO_MORE_ITEMS) {
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if (!IsNullPtr(lpcSubKeys))
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*lpcSubKeys = cItems;
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if (!IsNullPtr(lpcbMaxSubKeyLen))
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*lpcbMaxSubKeyLen = cbMaxStringLen;
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ErrorCode = ERROR_SUCCESS;
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}
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}
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ReturnErrorCode:
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RgUnlockRegistry();
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return ErrorCode;
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#ifndef VXD
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UNREFERENCED_PARAMETER(lpClass);
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UNREFERENCED_PARAMETER(lpcbClass);
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UNREFERENCED_PARAMETER(lpReserved);
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UNREFERENCED_PARAMETER(lpcbMaxClassLen);
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UNREFERENCED_PARAMETER(lpcbSecurityDescriptor);
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UNREFERENCED_PARAMETER(lpftLastWriteTime);
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#endif
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}
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