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Diffstat (limited to 'include/iprt/uint128.h')
| -rw-r--r-- | include/iprt/uint128.h | 698 |
1 files changed, 698 insertions, 0 deletions
diff --git a/include/iprt/uint128.h b/include/iprt/uint128.h new file mode 100644 index 00000000..d5df1c4a --- /dev/null +++ b/include/iprt/uint128.h @@ -0,0 +1,698 @@ +/** @file + * IPRT - RTUINT128U & uint128_t methods. + */ + +/* + * Copyright (C) 2011 Oracle Corporation + * + * This file is part of VirtualBox Open Source Edition (OSE), as + * available from http://www.virtualbox.org. This file is free software; + * you can redistribute it and/or modify it under the terms of the GNU + * General Public License (GPL) as published by the Free Software + * Foundation, in version 2 as it comes in the "COPYING" file of the + * VirtualBox OSE distribution. VirtualBox OSE is distributed in the + * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. + * + * The contents of this file may alternatively be used under the terms + * of the Common Development and Distribution License Version 1.0 + * (CDDL) only, as it comes in the "COPYING.CDDL" file of the + * VirtualBox OSE distribution, in which case the provisions of the + * CDDL are applicable instead of those of the GPL. + * + * You may elect to license modified versions of this file under the + * terms and conditions of either the GPL or the CDDL or both. + */ + +#ifndef ___iprt_uint128_h +#define ___iprt_uint128_h + +#include <iprt/cdefs.h> +#include <iprt/types.h> +#include <iprt/err.h> + +RT_C_DECLS_BEGIN + +/** @defgroup grp_rt_once RTUInt128 - 128-bit Unsigned Integer Methods + * @ingroup grp_rt + * @{ + */ + + +/** + * Test if a 128-bit unsigned integer value is zero. + * + * @returns true if they are, false if they aren't. + * @param pValue The input and output value. + */ +DECLINLINE(bool) RTUInt128IsZero(PRTUINT128U pValue) +{ +#if ARCH_BITS >= 64 + return pValue->s.Hi == 0 + && pValue->s.Lo == 0; +#else + return pValue->DWords.dw0 == 0 + && pValue->DWords.dw1 == 0 + && pValue->DWords.dw2 == 0 + && pValue->DWords.dw3 == 0; +#endif +} + + +/** + * Set a 128-bit unsigned integer value to zero. + * + * @returns pResult + * @param pResult The result variable. + */ +DECLINLINE(PRTUINT128U) RTUInt128SetZero(PRTUINT128U pResult) +{ +#if ARCH_BITS >= 64 + pResult->s.Hi = 0; + pResult->s.Lo = 0; +#else + pResult->DWords.dw0 = 0; + pResult->DWords.dw1 = 0; + pResult->DWords.dw2 = 0; + pResult->DWords.dw3 = 0; +#endif + return pResult; +} + + +/** + * Set a 128-bit unsigned integer value to the maximum value. + * + * @returns pResult + * @param pResult The result variable. + */ +DECLINLINE(PRTUINT128U) RTUInt128SetMax(PRTUINT128U pResult) +{ +#if ARCH_BITS >= 64 + pResult->s.Hi = UINT64_MAX; + pResult->s.Lo = UINT64_MAX; +#else + pResult->DWords.dw0 = UINT32_MAX; + pResult->DWords.dw1 = UINT32_MAX; + pResult->DWords.dw2 = UINT32_MAX; + pResult->DWords.dw3 = UINT32_MAX; +#endif + return pResult; +} + + +RTDECL(PRTUINT128U) RTUInt128Add(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2); +RTDECL(PRTUINT128U) RTUInt128Sub(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2); +RTDECL(PRTUINT128U) RTUInt128Div(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2); +RTDECL(PRTUINT128U) RTUInt128Mod(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2); +RTDECL(PRTUINT128U) RTUInt128And(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2); +RTDECL(PRTUINT128U) RTUInt128Or( PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2); +RTDECL(PRTUINT128U) RTUInt128Xor(PRTUINT128U pResult, PCRTUINT128U pValue1, PCRTUINT128U pValue2); +RTDECL(PRTUINT128U) RTUInt128ShiftLeft( PRTUINT128U pResult, PCRTUINT128U pValue, int cBits); +RTDECL(PRTUINT128U) RTUInt128ShiftRight(PRTUINT128U pResult, PCRTUINT128U pValue, int cBits); +RTDECL(PRTUINT128U) RTUInt128BooleanNot(PRTUINT128U pResult, PCRTUINT128U pValue); +RTDECL(PRTUINT128U) RTUInt128BitwiseNot(PRTUINT128U pResult, PCRTUINT128U pValue); + + +/** + * Assigns one 128-bit unsigned integer value to another. + * + * @returns pResult + * @param pResult The result variable. + * @param pValue The value to assign. + */ +DECLINLINE(PRTUINT128U) RTUInt128Assign(PRTUINT128U pResult, PCRTUINT128U pValue) +{ +#if ARCH_BITS >= 64 + pResult->s.Hi = pValue->s.Hi; + pResult->s.Lo = pValue->s.Lo; +#else + pResult->DWords.dw0 = pValue->DWords.dw0; + pResult->DWords.dw1 = pValue->DWords.dw1; + pResult->DWords.dw2 = pValue->DWords.dw2; + pResult->DWords.dw3 = pValue->DWords.dw3; +#endif + return pResult; +} + + +/** + * Assigns a boolean value to 128-bit unsigned integer. + * + * @returns pResult + * @param pResult The result variable. + * @param fValue The boolean value. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignBoolean(PRTUINT128U pValueResult, bool fValue) +{ +#if ARCH_BITS >= 64 + pValueResult->s.Lo = fValue; + pValueResult->s.Hi = 0; +#else + pValueResult->DWords.dw0 = fValue; + pValueResult->DWords.dw1 = 0; + pValueResult->DWords.dw2 = 0; + pValueResult->DWords.dw3 = 0; +#endif + return pValueResult; +} + + +/** + * Assigns a 8-bit unsigned integer value to 128-bit unsigned integer. + * + * @returns pResult + * @param pResult The result variable. + * @param u8Value The 8-bit unsigned integer value. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignU8(PRTUINT128U pValueResult, uint8_t u8Value) +{ +#if ARCH_BITS >= 64 + pValueResult->s.Lo = u8Value; + pValueResult->s.Hi = 0; +#else + pValueResult->DWords.dw0 = u8Value; + pValueResult->DWords.dw1 = 0; + pValueResult->DWords.dw2 = 0; + pValueResult->DWords.dw3 = 0; +#endif + return pValueResult; +} + + +/** + * Assigns a 16-bit unsigned integer value to 128-bit unsigned integer. + * + * @returns pResult + * @param pResult The result variable. + * @param u16Value The 16-bit unsigned integer value. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignU16(PRTUINT128U pValueResult, uint16_t u16Value) +{ +#if ARCH_BITS >= 64 + pValueResult->s.Lo = u16Value; + pValueResult->s.Hi = 0; +#else + pValueResult->DWords.dw0 = u16Value; + pValueResult->DWords.dw1 = 0; + pValueResult->DWords.dw2 = 0; + pValueResult->DWords.dw3 = 0; +#endif + return pValueResult; +} + + +/** + * Assigns a 16-bit unsigned integer value to 128-bit unsigned integer. + * + * @returns pResult + * @param pResult The result variable. + * @param u32Value The 32-bit unsigned integer value. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignU32(PRTUINT128U pValueResult, uint32_t u32Value) +{ +#if ARCH_BITS >= 64 + pValueResult->s.Lo = u32Value; + pValueResult->s.Hi = 0; +#else + pValueResult->DWords.dw0 = u32Value; + pValueResult->DWords.dw1 = 0; + pValueResult->DWords.dw2 = 0; + pValueResult->DWords.dw3 = 0; +#endif + return pValueResult; +} + + +/** + * Assigns a 64-bit unsigned integer value to 128-bit unsigned integer. + * + * @returns pResult + * @param pResult The result variable. + * @param u32Value The 32-bit unsigned integer value. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignU64(PRTUINT128U pValueResult, uint64_t u64Value) +{ + pValueResult->s.Lo = u64Value; + pValueResult->s.Hi = 0; + return pValueResult; +} + + +RTDECL(PRTUINT128U) RTUInt128AssignAdd(PRTUINT128U pValue1Result, PCRTUINT128U pValue2); +RTDECL(PRTUINT128U) RTUInt128AssignSub(PRTUINT128U pValue1Result, PCRTUINT128U pValue2); +RTDECL(PRTUINT128U) RTUInt128AssignDiv(PRTUINT128U pValue1Result, PCRTUINT128U pValue2); +RTDECL(PRTUINT128U) RTUInt128AssignMod(PRTUINT128U pValue1Result, PCRTUINT128U pValue2); + + +/** + * Performs a bitwise AND of two 128-bit unsigned integer values and assigned + * the result to the first one. + * + * @returns pValue1Result. + * @param pValue1Result The first value and result. + * @param pValue2 The second value. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignAnd(PRTUINT128U pValue1Result, PCRTUINT128U pValue2) +{ +#if ARCH_BITS >= 64 + pValue1Result->s.Hi &= pValue2->s.Hi; + pValue1Result->s.Lo &= pValue2->s.Lo; +#else + pValue1Result->DWords.dw0 &= pValue2->DWords.dw0; + pValue1Result->DWords.dw1 &= pValue2->DWords.dw1; + pValue1Result->DWords.dw2 &= pValue2->DWords.dw2; + pValue1Result->DWords.dw3 &= pValue2->DWords.dw3; +#endif + return pValue1Result; +} + + +/** + * Performs a bitwise AND of a 128-bit unsigned integer value and a mask made + * up of the first N bits, assigning the result to the the 128-bit value. + * + * @returns pValueResult. + * @param pValueResult The value and result. + * @param cBits The number of bits to AND (counting from the first + * bit). + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignAndNFirstBits(PRTUINT128U pValueResult, unsigned cBits) +{ + if (cBits <= 64) + { + if (cBits != 64) + pValueResult->s.Lo &= (RT_BIT_64(cBits) - 1); + pValueResult->s.Hi = 0; + } + else if (cBits < 128) + pValueResult->s.Hi &= (RT_BIT_64(cBits - 64) - 1); +/** @todo #if ARCH_BITS >= 64 */ + return pValueResult; +} + + +/** + * Performs a bitwise OR of two 128-bit unsigned integer values and assigned + * the result to the first one. + * + * @returns pValue1Result. + * @param pValue1Result The first value and result. + * @param pValue2 The second value. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignOr(PRTUINT128U pValue1Result, PCRTUINT128U pValue2) +{ +#if ARCH_BITS >= 64 + pValue1Result->s.Hi |= pValue2->s.Hi; + pValue1Result->s.Lo |= pValue2->s.Lo; +#else + pValue1Result->DWords.dw0 |= pValue2->DWords.dw0; + pValue1Result->DWords.dw1 |= pValue2->DWords.dw1; + pValue1Result->DWords.dw2 |= pValue2->DWords.dw2; + pValue1Result->DWords.dw3 |= pValue2->DWords.dw3; +#endif + return pValue1Result; +} + + +/** + * Performs a bitwise XOR of two 128-bit unsigned integer values and assigned + * the result to the first one. + * + * @returns pValue1Result. + * @param pValue1Result The first value and result. + * @param pValue2 The second value. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignXor(PRTUINT128U pValue1Result, PCRTUINT128U pValue2) +{ +#if ARCH_BITS >= 64 + pValue1Result->s.Hi ^= pValue2->s.Hi; + pValue1Result->s.Lo ^= pValue2->s.Lo; +#else + pValue1Result->DWords.dw0 ^= pValue2->DWords.dw0; + pValue1Result->DWords.dw1 ^= pValue2->DWords.dw1; + pValue1Result->DWords.dw2 ^= pValue2->DWords.dw2; + pValue1Result->DWords.dw3 ^= pValue2->DWords.dw3; +#endif + return pValue1Result; +} + + +/** + * Performs a bitwise left shift on a 128-bit unsigned integer value, assigning + * the result to it. + * + * @returns pValue1Result. + * @param pValue1Result The first value and result. + * @param cBits The number of bits to shift. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignShiftLeft(PRTUINT128U pValueResult, int cBits) +{ + RTUINT128U const InVal = *pValueResult; +/** @todo #if ARCH_BITS >= 64 */ + if (cBits > 0) + { + /* (left shift) */ + if (cBits >= 128) + RTUInt128SetZero(pValueResult); + else if (cBits >= 64) + { + pValueResult->s.Lo = 0; + pValueResult->s.Hi = InVal.s.Lo << (cBits - 64); + } + else + { + pValueResult->s.Hi = InVal.s.Hi << cBits; + pValueResult->s.Hi |= InVal.s.Lo >> (64 - cBits); + pValueResult->s.Lo = InVal.s.Lo << cBits; + } + } + else if (cBits < 0) + { + /* (right shift) */ + cBits = -cBits; + if (cBits >= 128) + RTUInt128SetZero(pValueResult); + else if (cBits >= 64) + { + pValueResult->s.Hi = 0; + pValueResult->s.Lo = InVal.s.Hi >> (cBits - 64); + } + else + { + pValueResult->s.Lo = InVal.s.Lo >> cBits; + pValueResult->s.Lo |= InVal.s.Hi << (64 - cBits); + pValueResult->s.Hi = InVal.s.Hi >> cBits; + } + } + return pValueResult; +} + + +/** + * Performs a bitwise left shift on a 128-bit unsigned integer value, assigning + * the result to it. + * + * @returns pValue1Result. + * @param pValue1Result The first value and result. + * @param cBits The number of bits to shift. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignShiftRight(PRTUINT128U pValueResult, int cBits) +{ + return RTUInt128AssignShiftLeft(pValueResult, -cBits); +} + + +/** + * Performs a bitwise NOT on a 128-bit unsigned integer value, assigning the + * result to it. + * + * @returns pValueResult + * @param pValueResult The value and result. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignBitwiseNot(PRTUINT128U pValueResult) +{ +#if ARCH_BITS >= 64 + pValueResult->s.Hi = ~pValueResult->s.Hi; + pValueResult->s.Lo = ~pValueResult->s.Lo; +#else + pValueResult->DWords.dw0 = ~pValueResult->DWords.dw0; + pValueResult->DWords.dw1 = ~pValueResult->DWords.dw1; + pValueResult->DWords.dw2 = ~pValueResult->DWords.dw2; + pValueResult->DWords.dw3 = ~pValueResult->DWords.dw3; +#endif + return pValueResult; +} + + +/** + * Performs a boolean NOT on a 128-bit unsigned integer value, assigning the + * result to it. + * + * @returns pValueResult + * @param pValueResult The value and result. + */ +DECLINLINE(PRTUINT128U) RTUInt128AssignBooleanNot(PRTUINT128U pValueResult) +{ + return RTUInt128AssignBoolean(pValueResult, RTUInt128IsZero(pValueResult)); +} + + +/** + * Compares two 128-bit unsigned integer values. + * + * @retval 0 if equal. + * @retval -1 if the first value is smaller than the second. + * @retval 1 if the first value is larger than the second. + * + * @param pValue1 The first value. + * @param pValue2 The second value. + */ +DECLINLINE(int) RTUInt128Compare(PCRTUINT128U pValue1, PCRTUINT128U pValue2) +{ +#if ARCH_BITS >= 64 + if (pValue1->s.Hi != pValue2->s.Hi) + return pValue1->s.Hi > pValue2->s.Hi ? 1 : -1; + if (pValue1->s.Lo != pValue2->s.Lo) + return pValue1->s.Lo > pValue2->s.Lo ? 1 : -1; + return 0; +#else + if (pValue1->DWords.dw0 != pValue2->DWords.dw0) + return pValue1->DWords.dw0 > pValue2->DWords.dw0 ? 1 : -1; + if (pValue1->DWords.dw1 != pValue2->DWords.dw1) + return pValue1->DWords.dw1 > pValue2->DWords.dw1 ? 1 : -1; + if (pValue1->DWords.dw2 != pValue2->DWords.dw2) + return pValue1->DWords.dw2 > pValue2->DWords.dw2 ? 1 : -1; + if (pValue1->DWords.dw3 != pValue2->DWords.dw3) + return pValue1->DWords.dw3 > pValue2->DWords.dw3 ? 1 : -1; + return 0; +#endif +} + + +/** + * Tests if two 128-bit unsigned integer values not equal. + * + * @returns true if equal, false if not equal. + * @param pValue1 The first value. + * @param pValue2 The second value. + */ +DECLINLINE(bool) RTUInt128IsEqual(PCRTUINT128U pValue1, PCRTUINT128U pValue2) +{ +#if ARCH_BITS >= 64 + return pValue1->s.Hi == pValue2->s.Hi + && pValue1->s.Lo == pValue2->s.Lo; +#else + return pValue1->DWords.dw0 == pValue2->DWords.dw0 + && pValue1->DWords.dw1 == pValue2->DWords.dw1 + && pValue1->DWords.dw2 == pValue2->DWords.dw2 + && pValue1->DWords.dw3 == pValue2->DWords.dw3; +#endif +} + + +/** + * Tests if two 128-bit unsigned integer values are not equal. + * + * @returns true if not equal, false if equal. + * @param pValue1 The first value. + * @param pValue2 The second value. + */ +DECLINLINE(bool) RTUInt128IsNotEqual(PCRTUINT128U pValue1, PCRTUINT128U pValue2) +{ + return !RTUInt128IsEqual(pValue1, pValue2); +} + + +/** + * Sets a bit in a 128-bit unsigned integer type. + * + * @returns pValueResult. + * @param pValueResult The input and output value. + * @param iBit The bit to set. + */ +DECLINLINE(PRTUINT128U) RTUInt128BitSet(PRTUINT128U pValueResult, unsigned iBit) +{ + if (iBit < 64) + { +#if ARCH_BITS >= 64 + pValueResult->s.Lo |= RT_BIT_64(iBit); +#else + if (iBit < 32) + pValueResult->DWords.dw0 |= RT_BIT_32(iBit); + else + pValueResult->DWords.dw1 |= RT_BIT_32(iBit - 32); +#endif + } + else if (iBit < 128) + { +#if ARCH_BITS >= 64 + pValueResult->s.Hi |= RT_BIT_64(iBit - 64); +#else + if (iBit < 96) + pValueResult->DWords.dw2 |= RT_BIT_32(iBit - 64); + else + pValueResult->DWords.dw3 |= RT_BIT_32(iBit - 96); +#endif + } + return pValueResult; +} + + +/** + * Sets a bit in a 128-bit unsigned integer type. + * + * @returns pValueResult. + * @param pValueResult The input and output value. + * @param iBit The bit to set. + */ +DECLINLINE(PRTUINT128U) RTUInt128BitClear(PRTUINT128U pValueResult, unsigned iBit) +{ + if (iBit < 64) + { +#if ARCH_BITS >= 64 + pValueResult->s.Lo &= ~RT_BIT_64(iBit); +#else + if (iBit < 32) + pValueResult->DWords.dw0 &= ~RT_BIT_32(iBit); + else + pValueResult->DWords.dw1 &= ~RT_BIT_32(iBit - 32); +#endif + } + else if (iBit < 128) + { +#if ARCH_BITS >= 64 + pValueResult->s.Hi &= ~RT_BIT_64(iBit - 64); +#else + if (iBit < 96) + pValueResult->DWords.dw2 &= ~RT_BIT_32(iBit - 64); + else + pValueResult->DWords.dw3 &= ~RT_BIT_32(iBit - 96); +#endif + } + return pValueResult; +} + + +/** + * Tests if a bit in a 128-bit unsigned integer value is set. + * + * @returns pValueResult. + * @param pValueResult The input and output value. + * @param iBit The bit to test. + */ +DECLINLINE(bool) RTUInt128BitTest(PRTUINT128U pValueResult, unsigned iBit) +{ + bool fRc; + if (iBit < 64) + { +#if ARCH_BITS >= 64 + fRc = RT_BOOL(pValueResult->s.Lo & RT_BIT_64(iBit)); +#else + if (iBit < 32) + fRc = RT_BOOL(pValueResult->DWords.dw0 & RT_BIT_32(iBit)); + else + fRc = RT_BOOL(pValueResult->DWords.dw1 & RT_BIT_32(iBit - 32)); +#endif + } + else if (iBit < 128) + { +#if ARCH_BITS >= 64 + fRc = RT_BOOL(pValueResult->s.Hi & RT_BIT_64(iBit - 64)); +#else + if (iBit < 96) + fRc = RT_BOOL(pValueResult->DWords.dw2 & RT_BIT_32(iBit - 64)); + else + fRc = RT_BOOL(pValueResult->DWords.dw3 & RT_BIT_32(iBit - 96)); +#endif + } + else + fRc = false; + return fRc; +} + + +/** + * Set a range of bits a 128-bit unsigned integer value. + * + * @returns pValueResult. + * @param pValueResult The input and output value. + * @param iFirstBit The first bit to test. + * @param cBits The number of bits to set. + */ +DECLINLINE(PRTUINT128U) RTUInt128BitSetRange(PRTUINT128U pValueResult, unsigned iFirstBit, unsigned cBits) +{ + /* bounds check & fix. */ + if (iFirstBit < 128) + { + if (iFirstBit + cBits > 128) + cBits = 128 - iFirstBit; + +#if ARCH_BITS >= 64 + if (iFirstBit + cBits < 64) + pValueResult->s.Lo |= (RT_BIT_64(cBits) - 1) << iFirstBit; + else if (iFirstBit + cBits < 128 && iFirstBit >= 64) + pValueResult->s.Hi |= (RT_BIT_64(cBits) - 1) << (iFirstBit - 64); + else +#else + if (iFirstBit + cBits < 32) + pValueResult->DWords.dw0 |= (RT_BIT_32(cBits) - 1) << iFirstBit; + else if (iFirstBit + cBits < 64 && iFirstBit >= 32) + pValueResult->DWords.dw1 |= (RT_BIT_32(cBits) - 1) << (iFirstBit - 32); + else if (iFirstBit + cBits < 96 && iFirstBit >= 64) + pValueResult->DWords.dw2 |= (RT_BIT_32(cBits) - 1) << (iFirstBit - 64); + else if (iFirstBit + cBits < 128 && iFirstBit >= 96) + pValueResult->DWords.dw3 |= (RT_BIT_32(cBits) - 1) << (iFirstBit - 96); + else +#endif + while (cBits-- > 0) + RTUInt128BitSet(pValueResult, iFirstBit++); + } + return pValueResult; +} + + +/** + * Test if all the bits of a 128-bit unsigned integer value are set. + * + * @returns true if they are, false if they aren't. + * @param pValue The input and output value. + */ +DECLINLINE(bool) RTUInt128BitAreAllSet(PRTUINT128U pValue) +{ +#if ARCH_BITS >= 64 + return pValue->s.Hi == UINT64_MAX + && pValue->s.Lo == UINT64_MAX; +#else + return pValue->DWords.dw0 == UINT32_MAX + && pValue->DWords.dw1 == UINT32_MAX + && pValue->DWords.dw2 == UINT32_MAX + && pValue->DWords.dw3 == UINT32_MAX; +#endif +} + + +/** + * Test if all the bits of a 128-bit unsigned integer value are clear. + * + * @returns true if they are, false if they aren't. + * @param pValue The input and output value. + */ +DECLINLINE(bool) RTUInt128BitAreAllClear(PRTUINT128U pValue) +{ +#if ARCH_BITS >= 64 + return pValue->s.Hi == 0 + && pValue->s.Lo == 0; +#else + return pValue->DWords.dw0 == 0 + && pValue->DWords.dw1 == 0 + && pValue->DWords.dw2 == 0 + && pValue->DWords.dw3 == 0; +#endif +} + +/** @} */ + +RT_C_DECLS_END + +#endif + |