/** @file * IPRT - RTUINT32U methods for old 16-bit compilers (mainly for division). */ /* * Copyright (C) 2011-2020 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_INCLUDED_uint32_h #define IPRT_INCLUDED_uint32_h #ifndef RT_WITHOUT_PRAGMA_ONCE # pragma once #endif #include #include #include RT_C_DECLS_BEGIN /** @defgroup grp_rt_uint32 RTUInt32 - 32-bit Unsigned Integer Methods for 16-bit compilers. * @ingroup grp_rt * @{ */ #define RTUINT32_HAVE_32BIT_BASICS /** * Test if a 32-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) RTUInt32IsZero(PRTUINT32U pValue) { return pValue->s.Lo == 0 && pValue->s.Hi == 0; } /** * Set a 32-bit unsigned integer value to zero. * * @returns pResult * @param pResult The result variable. */ DECLINLINE(PRTUINT32U) RTUInt32SetZero(PRTUINT32U pResult) { pResult->s.Hi = 0; pResult->s.Lo = 0; return pResult; } /** * Set a 32-bit unsigned integer value to the maximum value. * * @returns pResult * @param pResult The result variable. */ DECLINLINE(PRTUINT32U) RTUInt32SetMax(PRTUINT32U pResult) { pResult->s.Hi = UINT16_MAX; pResult->s.Lo = UINT16_MAX; return pResult; } /** * Adds two 32-bit unsigned integer values. * * @returns pResult * @param pResult The result variable. * @param pValue1 The first value. * @param pValue2 The second value. */ DECLINLINE(PRTUINT32U) RTUInt32Add(PRTUINT32U pResult, PCRTUINT32U pValue1, PCRTUINT32U pValue2) { #ifdef RTUINT32_HAVE_32BIT_BASICS pResult->u = pValue1->u + pValue2->u; #else pResult->s.Hi = pValue1->s.Hi + pValue2->s.Hi; pResult->s.Lo = pValue1->s.Lo + pValue2->s.Lo; if (pResult->s.Lo < pValue1->s.Lo) pResult->s.Hi++; #endif return pResult; } /** * Adds a 32-bit and a 16-bit unsigned integer values. * * @returns pResult * @param pResult The result variable. * @param pValue1 The first value. * @param uValue2 The second value, 16-bit. */ DECLINLINE(PRTUINT32U) RTUInt32AddU16(PRTUINT32U pResult, PCRTUINT32U pValue1, uint16_t uValue2) { #ifdef RTUINT32_HAVE_32BIT_BASICS pResult->u = pValue1->u + uValue2; #else pResult->s.Hi = pValue1->s.Hi; pResult->s.Lo = pValue1->s.Lo + uValue2; if (pResult->s.Lo < pValue1->s.Lo) pResult->s.Hi++; #endif return pResult; } /** * Subtracts a 32-bit unsigned integer value from another. * * @returns pResult * @param pResult The result variable. * @param pValue1 The minuend value. * @param pValue2 The subtrahend value. */ DECLINLINE(PRTUINT32U) RTUInt32Sub(PRTUINT32U pResult, PCRTUINT32U pValue1, PCRTUINT32U pValue2) { #ifdef RTUINT32_HAVE_32BIT_BASICS pResult->u = pValue1->u - pValue2->u; #else pResult->s.Lo = pValue1->s.Lo - pValue2->s.Lo; pResult->s.Hi = pValue1->s.Hi - pValue2->s.Hi; if (pResult->s.Lo > pValue1->s.Lo) pResult->s.Hi--; #endif return pResult; } /** * Multiplies two 32-bit unsigned integer values. * * @returns pResult * @param pResult The result variable. * @param pValue1 The first value. * @param pValue2 The second value. */ DECLINLINE(PRTUINT32U) RTUInt32Mul(PRTUINT32U pResult, PCRTUINT32U pValue1, PCRTUINT32U pValue2) { pResult->u = (uint32_t)pValue1->s.Lo * pValue2->s.Lo; pResult->s.Hi += pValue1->s.Hi * pValue2->s.Lo; pResult->s.Hi += pValue1->s.Lo * pValue2->s.Hi; return pResult; } /** * Multiplies an 32-bit unsigned integer by a 16-bit unsigned integer value. * * @returns pResult * @param pResult The result variable. * @param pValue1 The first value. * @param uValue2 The second value, 16-bit. */ DECLINLINE(PRTUINT32U) RTUInt32MulByU16(PRTUINT32U pResult, PCRTUINT32U pValue1, uint16_t uValue2) { pResult->u = (uint32_t)pValue1->s.Lo * uValue2; pResult->s.Hi += pValue1->s.Hi * uValue2; return pResult; } DECLINLINE(PRTUINT32U) RTUInt32DivRem(PRTUINT32U pQuotient, PRTUINT32U pRemainder, PCRTUINT32U pValue1, PCRTUINT32U pValue2); /** * Divides a 32-bit unsigned integer value by another. * * @returns pResult * @param pResult The result variable. * @param pValue1 The dividend value. * @param pValue2 The divisor value. */ DECLINLINE(PRTUINT32U) RTUInt32Div(PRTUINT32U pResult, PCRTUINT32U pValue1, PCRTUINT32U pValue2) { RTUINT32U Ignored; return RTUInt32DivRem(pResult, &Ignored, pValue1, pValue2); } /** * Divides a 32-bit unsigned integer value by another, returning the remainder. * * @returns pResult * @param pResult The result variable (remainder). * @param pValue1 The dividend value. * @param pValue2 The divisor value. */ DECLINLINE(PRTUINT32U) RTUInt32Mod(PRTUINT32U pResult, PCRTUINT32U pValue1, PCRTUINT32U pValue2) { RTUINT32U Ignored; RTUInt32DivRem(&Ignored, pResult, pValue1, pValue2); return pResult; } /** * Bitwise AND of two 32-bit unsigned integer values. * * @returns pResult * @param pResult The result variable. * @param pValue1 The first value. * @param pValue2 The second value. */ DECLINLINE(PRTUINT32U) RTUInt32And(PRTUINT32U pResult, PCRTUINT32U pValue1, PCRTUINT32U pValue2) { pResult->s.Hi = pValue1->s.Hi & pValue2->s.Hi; pResult->s.Lo = pValue1->s.Lo & pValue2->s.Lo; return pResult; } /** * Bitwise OR of two 32-bit unsigned integer values. * * @returns pResult * @param pResult The result variable. * @param pValue1 The first value. * @param pValue2 The second value. */ DECLINLINE(PRTUINT32U) RTUInt32Or( PRTUINT32U pResult, PCRTUINT32U pValue1, PCRTUINT32U pValue2) { pResult->s.Hi = pValue1->s.Hi | pValue2->s.Hi; pResult->s.Lo = pValue1->s.Lo | pValue2->s.Lo; return pResult; } /** * Bitwise XOR of two 32-bit unsigned integer values. * * @returns pResult * @param pResult The result variable. * @param pValue1 The first value. * @param pValue2 The second value. */ DECLINLINE(PRTUINT32U) RTUInt32Xor(PRTUINT32U pResult, PCRTUINT32U pValue1, PCRTUINT32U pValue2) { pResult->s.Hi = pValue1->s.Hi ^ pValue2->s.Hi; pResult->s.Lo = pValue1->s.Lo ^ pValue2->s.Lo; return pResult; } /** * Shifts a 32-bit unsigned integer value @a cBits to the left. * * @returns pResult * @param pResult The result variable. * @param pValue The value to shift. * @param cBits The number of bits to shift it. */ DECLINLINE(PRTUINT32U) RTUInt32ShiftLeft(PRTUINT32U pResult, PCRTUINT32U pValue, int cBits) { cBits &= 31; #ifdef RTUINT32_HAVE_32BIT_BASICS pResult->u = pValue->u << cBits; #else if (cBits < 16) { pResult->s.Lo = pValue->s.Lo << cBits; pResult->s.Hi = (pValue->s.Hi << cBits) | (pValue->s.Lo >> (16 - cBits)); } else { pResult->s.Lo = 0; pResult->s.Hi = pValue->s.Lo << (cBits - 16); } #endif return pResult; } /** * Shifts a 32-bit unsigned integer value @a cBits to the right. * * @returns pResult * @param pResult The result variable. * @param pValue The value to shift. * @param cBits The number of bits to shift it. */ DECLINLINE(PRTUINT32U) RTUInt32ShiftRight(PRTUINT32U pResult, PCRTUINT32U pValue, int cBits) { cBits &= 31; #ifdef RTUINT32_HAVE_32BIT_BASICS pResult->u = pValue->u >> cBits; #else if (cBits < 16) { pResult->s.Hi = pValue->s.Hi >> cBits; pResult->s.Lo = (pValue->s.Lo >> cBits) | (pValue->s.Hi << (16 - cBits)); } else { pResult->s.Hi = 0; pResult->s.Lo = pValue->s.Hi >> (cBits - 16); } #endif return pResult; } /** * Boolean not (result 0 or 1). * * @returns pResult. * @param pResult The result variable. * @param pValue The value. */ DECLINLINE(PRTUINT32U) RTUInt32BooleanNot(PRTUINT32U pResult, PCRTUINT32U pValue) { pResult->s.Lo = pValue->s.Lo || pValue->s.Hi ? 0 : 1; pResult->s.Hi = 0; return pResult; } /** * Bitwise not (flips each bit of the 32 bits). * * @returns pResult. * @param pResult The result variable. * @param pValue The value. */ DECLINLINE(PRTUINT32U) RTUInt32BitwiseNot(PRTUINT32U pResult, PCRTUINT32U pValue) { pResult->s.Hi = ~pValue->s.Hi; pResult->s.Lo = ~pValue->s.Lo; return pResult; } /** * Assigns one 32-bit unsigned integer value to another. * * @returns pResult * @param pResult The result variable. * @param pValue The value to assign. */ DECLINLINE(PRTUINT32U) RTUInt32Assign(PRTUINT32U pResult, PCRTUINT32U pValue) { pResult->s.Hi = pValue->s.Hi; pResult->s.Lo = pValue->s.Lo; return pResult; } /** * Assigns a boolean value to 32-bit unsigned integer. * * @returns pValueResult * @param pValueResult The result variable. * @param fValue The boolean value. */ DECLINLINE(PRTUINT32U) RTUInt32AssignBoolean(PRTUINT32U pValueResult, bool fValue) { pValueResult->s.Lo = fValue; pValueResult->s.Hi = 0; return pValueResult; } /** * Assigns a 8-bit unsigned integer value to 32-bit unsigned integer. * * @returns pValueResult * @param pValueResult The result variable. * @param u8Value The 8-bit unsigned integer value. */ DECLINLINE(PRTUINT32U) RTUInt32AssignU8(PRTUINT32U pValueResult, uint8_t u8Value) { pValueResult->s.Lo = u8Value; pValueResult->s.Hi = 0; return pValueResult; } /** * Assigns a 16-bit unsigned integer value to 32-bit unsigned integer. * * @returns pValueResult * @param pValueResult The result variable. * @param u16Value The 16-bit unsigned integer value. */ DECLINLINE(PRTUINT32U) RTUInt32AssignU16(PRTUINT32U pValueResult, uint16_t u16Value) { pValueResult->s.Lo = u16Value; pValueResult->s.Hi = 0; return pValueResult; } /** * Adds two 32-bit unsigned integer values, storing the result in the first. * * @returns pValue1Result. * @param pValue1Result The first value and result. * @param pValue2 The second value. */ DECLINLINE(PRTUINT32U) RTUInt32AssignAdd(PRTUINT32U pValue1Result, PCRTUINT32U pValue2) { #ifdef RTUINT32_HAVE_32BIT_BASICS pValue1Result->u += pValue2->u; #else uint16_t const uTmp = pValue1Result->s.Lo; pValue1Result->s.Lo += pValue2->s.Lo; if (pValue1Result->s.Lo < uTmp) pValue1Result->s.Hi++; pValue1Result->s.Hi += pValue2->s.Hi; #endif return pValue1Result; } /** * Subtracts two 32-bit unsigned integer values, storing the result in the * first. * * @returns pValue1Result. * @param pValue1Result The minuend value and result. * @param pValue2 The subtrahend value. */ DECLINLINE(PRTUINT32U) RTUInt32AssignSub(PRTUINT32U pValue1Result, PCRTUINT32U pValue2) { #ifdef RTUINT32_HAVE_32BIT_BASICS pValue1Result->u -= pValue2->u; #else uint32_t const uTmp = pValue1Result->s.Lo; pValue1Result->s.Lo -= pValue2->s.Lo; if (pValue1Result->s.Lo > uTmp) pValue1Result->s.Hi--; pValue1Result->s.Hi -= pValue2->s.Hi; #endif return pValue1Result; } /** * Multiplies two 32-bit unsigned integer values, storing the result in the * first. * * @returns pValue1Result. * @param pValue1Result The first value and result. * @param pValue2 The second value. */ DECLINLINE(PRTUINT32U) RTUInt32AssignMul(PRTUINT32U pValue1Result, PCRTUINT32U pValue2) { RTUINT32U Result; RTUInt32Mul(&Result, pValue1Result, pValue2); *pValue1Result = Result; return pValue1Result; } /** * Divides a 32-bit unsigned integer value by another, storing the result in * the first. * * @returns pValue1Result. * @param pValue1Result The dividend value and result. * @param pValue2 The divisor value. */ DECLINLINE(PRTUINT32U) RTUInt32AssignDiv(PRTUINT32U pValue1Result, PCRTUINT32U pValue2) { RTUINT32U Result; RTUINT32U Ignored; RTUInt32DivRem(&Result, &Ignored, pValue1Result, pValue2); *pValue1Result = Result; return pValue1Result; } /** * Divides a 32-bit unsigned integer value by another, storing the remainder in * the first. * * @returns pValue1Result. * @param pValue1Result The dividend value and result (remainder). * @param pValue2 The divisor value. */ DECLINLINE(PRTUINT32U) RTUInt32AssignMod(PRTUINT32U pValue1Result, PCRTUINT32U pValue2) { RTUINT32U Ignored; RTUINT32U Result; RTUInt32DivRem(&Ignored, &Result, pValue1Result, pValue2); *pValue1Result = Result; return pValue1Result; } /** * Performs a bitwise AND of two 32-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(PRTUINT32U) RTUInt32AssignAnd(PRTUINT32U pValue1Result, PCRTUINT32U pValue2) { pValue1Result->s.Hi &= pValue2->s.Hi; pValue1Result->s.Lo &= pValue2->s.Lo; return pValue1Result; } /** * Performs a bitwise AND of a 32-bit unsigned integer value and a mask made up * of the first N bits, assigning the result to the the 32-bit value. * * @returns pValueResult. * @param pValueResult The value and result. * @param cBits The number of bits to AND (counting from the first * bit). */ DECLINLINE(PRTUINT32U) RTUInt32AssignAndNFirstBits(PRTUINT32U pValueResult, unsigned cBits) { #ifdef RTUINT32_HAVE_32BIT_BASICS if (cBits < 32) pValueResult->u &= RT_BIT_32(cBits) - 1; #else if (cBits <= 16) { if (cBits != 16) pValueResult->s.Lo &= (UINT16_C(1) << cBits) - 1; pValueResult->s.Hi = 0; } else if (cBits < 16) pValueResult->s.Hi &= (UINT16_C(1) << (cBits - 16)) - 1; #endif return pValueResult; } /** * Performs a bitwise OR of two 32-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(PRTUINT32U) RTUInt32AssignOr(PRTUINT32U pValue1Result, PCRTUINT32U pValue2) { pValue1Result->s.Hi |= pValue2->s.Hi; pValue1Result->s.Lo |= pValue2->s.Lo; return pValue1Result; } /** * ORs in a bit and assign the result to the input value. * * @returns pValue1Result. * @param pValue1Result The first value and result. * @param iBit The bit to set (0 based). */ DECLINLINE(PRTUINT32U) RTUInt32AssignOrBit(PRTUINT32U pValue1Result, unsigned iBit) { #ifdef RTUINT32_HAVE_32BIT_BASICS pValue1Result->u |= RT_BIT_32(iBit); #else if (iBit >= 32) pValue1Result->s.Hi |= UINT16_C(1) << (iBit - 32); else pValue1Result->s.Lo |= UINT16_C(1) << iBit; #endif return pValue1Result; } /** * Performs a bitwise XOR of two 32-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(PRTUINT32U) RTUInt32AssignXor(PRTUINT32U pValue1Result, PCRTUINT32U pValue2) { pValue1Result->s.Hi ^= pValue2->s.Hi; pValue1Result->s.Lo ^= pValue2->s.Lo; return pValue1Result; } /** * Performs a bitwise left shift on a 32-bit unsigned integer value, assigning * the result to it. * * @returns pValueResult. * @param pValueResult The first value and result. * @param cBits The number of bits to shift. */ DECLINLINE(PRTUINT32U) RTUInt32AssignShiftLeft(PRTUINT32U pValueResult, int cBits) { #ifndef RTUINT32_HAVE_32BIT_BASICS RTUINT32U const InVal = *pValueResult; #endif if (cBits > 0) { /* (left shift) */ cBits &= 31; #ifdef RTUINT32_HAVE_32BIT_BASICS pValueResult->u <<= cBits; #else if (cBits >= 16) { pValueResult->s.Lo = 0; pValueResult->s.Hi = InVal.s.Lo << (cBits - 16); } else { pValueResult->s.Hi = InVal.s.Hi << cBits; pValueResult->s.Hi |= InVal.s.Lo >> (16 - cBits); pValueResult->s.Lo = InVal.s.Lo << cBits; } #endif } else if (cBits < 0) { /* (right shift) */ cBits = -cBits; cBits &= 31; #ifdef RTUINT32_HAVE_32BIT_BASICS pValueResult->u >>= cBits; #else if (cBits >= 16) { pValueResult->s.Hi = 0; pValueResult->s.Lo = InVal.s.Hi >> (cBits - 16); } else { pValueResult->s.Lo = InVal.s.Lo >> cBits; pValueResult->s.Lo |= InVal.s.Hi << (16 - cBits); pValueResult->s.Hi = InVal.s.Hi >> cBits; } #endif } return pValueResult; } /** * Performs a bitwise left shift on a 32-bit unsigned integer value, assigning * the result to it. * * @returns pValueResult. * @param pValueResult The first value and result. * @param cBits The number of bits to shift. */ DECLINLINE(PRTUINT32U) RTUInt32AssignShiftRight(PRTUINT32U pValueResult, int cBits) { return RTUInt32AssignShiftLeft(pValueResult, -cBits); } /** * Performs a bitwise NOT on a 32-bit unsigned integer value, assigning the * result to it. * * @returns pValueResult * @param pValueResult The value and result. */ DECLINLINE(PRTUINT32U) RTUInt32AssignBitwiseNot(PRTUINT32U pValueResult) { pValueResult->s.Hi = ~pValueResult->s.Hi; pValueResult->s.Lo = ~pValueResult->s.Lo; return pValueResult; } /** * Performs a boolean NOT on a 32-bit unsigned integer value, assigning the * result to it. * * @returns pValueResult * @param pValueResult The value and result. */ DECLINLINE(PRTUINT32U) RTUInt32AssignBooleanNot(PRTUINT32U pValueResult) { return RTUInt32AssignBoolean(pValueResult, RTUInt32IsZero(pValueResult)); } /** * Compares two 32-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) RTUInt32Compare(PCRTUINT32U pValue1, PCRTUINT32U pValue2) { 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; } /** * Tests if a 64-bit unsigned integer value is smaller than another. * * @returns true if the first value is smaller, false if not. * @param pValue1 The first value. * @param pValue2 The second value. */ DECLINLINE(bool) RTUInt32IsSmaller(PCRTUINT32U pValue1, PCRTUINT32U pValue2) { #ifdef RTUINT32_HAVE_32BIT_BASICS return pValue1->u < pValue2->u; #else return pValue1->s.Hi < pValue2->s.Hi || ( pValue1->s.Hi == pValue2->s.Hi && pValue1->s.Lo < pValue2->s.Lo); #endif } /** * Tests if a 32-bit unsigned integer value is larger than another. * * @returns true if the first value is larger, false if not. * @param pValue1 The first value. * @param pValue2 The second value. */ DECLINLINE(bool) RTUInt32IsLarger(PCRTUINT32U pValue1, PCRTUINT32U pValue2) { #ifdef RTUINT32_HAVE_32BIT_BASICS return pValue1->u > pValue2->u; #else return pValue1->s.Hi > pValue2->s.Hi || ( pValue1->s.Hi == pValue2->s.Hi && pValue1->s.Lo > pValue2->s.Lo); #endif } /** * Tests if a 64-bit unsigned integer value is larger or equal than another. * * @returns true if the first value is larger or equal, false if not. * @param pValue1 The first value. * @param pValue2 The second value. */ DECLINLINE(bool) RTUInt32IsLargerOrEqual(PCRTUINT32U pValue1, PCRTUINT32U pValue2) { #ifdef RTUINT32_HAVE_32BIT_BASICS return pValue1->u >= pValue2->u; #else return pValue1->s.Hi > pValue2->s.Hi || ( pValue1->s.Hi == pValue2->s.Hi && pValue1->s.Lo >= pValue2->s.Lo); #endif } /** * Tests if two 64-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) RTUInt32IsEqual(PCRTUINT32U pValue1, PCRTUINT32U pValue2) { #ifdef RTUINT32_HAVE_32BIT_BASICS return pValue1->u == pValue2->u; #else return pValue1->s.Hi == pValue2->s.Hi && pValue1->s.Lo == pValue2->s.Lo; #endif } /** * Tests if two 64-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) RTUInt32IsNotEqual(PCRTUINT32U pValue1, PCRTUINT32U pValue2) { return !RTUInt32IsEqual(pValue1, pValue2); } /** * Sets a bit in a 32-bit unsigned integer type. * * @returns pValueResult. * @param pValueResult The input and output value. * @param iBit The bit to set. */ DECLINLINE(PRTUINT32U) RTUInt32BitSet(PRTUINT32U pValueResult, unsigned iBit) { #ifdef RTUINT32_HAVE_32BIT_BASICS if (iBit < 32) pValueResult->u |= RT_BIT_32(iBit); #else if (iBit < 16) pValueResult->s.Lo |= UINT16_C(1) << iBit; else if (iBit < 32) pValueResult->s.Hi |= UINT16_C(1) << (iBit - 32); #endif return pValueResult; } /** * Sets a bit in a 32-bit unsigned integer type. * * @returns pValueResult. * @param pValueResult The input and output value. * @param iBit The bit to set. */ DECLINLINE(PRTUINT32U) RTUInt32BitClear(PRTUINT32U pValueResult, unsigned iBit) { #ifdef RTUINT32_HAVE_32BIT_BASICS if (iBit < 32) pValueResult->u &= ~RT_BIT_32(iBit); #else if (iBit < 16) pValueResult->s.Lo &= ~RT_BIT_32(iBit); else if (iBit < 32) pValueResult->s.Hi &= ~RT_BIT_32(iBit - 32); #endif return pValueResult; } /** * Tests if a bit in a 32-bit unsigned integer value is set. * * @returns pValueResult. * @param pValueResult The input and output value. * @param iBit The bit to test. */ DECLINLINE(bool) RTUInt32BitTest(PRTUINT32U pValueResult, unsigned iBit) { bool fRc; #ifdef RTUINT32_HAVE_32BIT_BASICS if (iBit < 32) fRc = RT_BOOL(pValueResult->u & RT_BIT_32(iBit)); #else if (iBit < 16) fRc = RT_BOOL(pValueResult->s.Lo & (UINT16_C(1) << iBit)); else if (iBit < 32) fRc = RT_BOOL(pValueResult->s.Hi & (UINT16_C(1) << (iBit - 64))); #endif else fRc = false; return fRc; } /** * Set a range of bits a 32-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(PRTUINT32U) RTUInt32BitSetRange(PRTUINT32U pValueResult, unsigned iFirstBit, unsigned cBits) { /* bounds check & fix. */ if (iFirstBit < 32) { #ifdef RTUINT32_HAVE_32BIT_BASICS if (iFirstBit + cBits < 32) pValueResult->u |= (RT_BIT_32(cBits) - 1) << iFirstBit; else pValueResult->u = UINT32_MAX << iFirstBit; #else if (iFirstBit + cBits > 32) cBits = 32 - iFirstBit; if (iFirstBit + cBits < 16) pValueResult->s.Lo |= ((UINT16_C(1) << cBits) - 1) << iFirstBit; else if (iFirstBit + cBits < 32 && iFirstBit >= 16) pValueResult->s.Hi |= ((UINT16_C(1) << cBits) - 1) << (iFirstBit - 16); else while (cBits-- > 0) RTUInt32BitSet(pValueResult, iFirstBit++); #endif } return pValueResult; } /** * Test if all the bits of a 32-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) RTUInt32BitAreAllSet(PRTUINT32U pValue) { return pValue->s.Hi == UINT16_MAX && pValue->s.Lo == UINT16_MAX; } /** * Test if all the bits of a 32-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) RTUInt32BitAreAllClear(PRTUINT32U pValue) { return RTUInt32IsZero(pValue); } DECLINLINE(unsigned) RTUInt32BitCount(PCRTUINT32U pValue) { unsigned cBits; if (pValue->s.Hi != 0) cBits = 16 + ASMBitLastSetU16(pValue->s.Hi); else cBits = ASMBitLastSetU16(pValue->s.Lo); return cBits; } /** * Divides a 32-bit unsigned integer value by another, returning both quotient * and remainder. * * @returns pQuotient, NULL if pValue2 is 0. * @param pQuotient Where to return the quotient. * @param pRemainder Where to return the remainder. * @param pValue1 The dividend value. * @param pValue2 The divisor value. */ DECLINLINE(PRTUINT32U) RTUInt32DivRem(PRTUINT32U pQuotient, PRTUINT32U pRemainder, PCRTUINT32U pValue1, PCRTUINT32U pValue2) { int iDiff; /* * Sort out all the special cases first. */ /* Divide by zero or 1? */ if (!pValue2->s.Hi) { if (!pValue2->s.Lo) return NULL; if (pValue2->s.Lo == 1) { RTUInt32SetZero(pRemainder); *pQuotient = *pValue1; return pQuotient; } /** @todo RTUInt32DivModByU32 */ } /* Dividend is smaller? */ iDiff = RTUInt32Compare(pValue1, pValue2); if (iDiff < 0) { *pRemainder = *pValue1; RTUInt32SetZero(pQuotient); } /* The values are equal? */ else if (iDiff == 0) { RTUInt32SetZero(pRemainder); RTUInt32AssignU8(pQuotient, 1); } else { /* * Prepare. */ unsigned iBitAdder = RTUInt32BitCount(pValue1) - RTUInt32BitCount(pValue2); RTUINT32U NormDivisor = *pValue2; if (iBitAdder) { RTUInt32ShiftLeft(&NormDivisor, pValue2, iBitAdder); if (RTUInt32IsLarger(&NormDivisor, pValue1)) { RTUInt32AssignShiftRight(&NormDivisor, 1); iBitAdder--; } } else NormDivisor = *pValue2; RTUInt32SetZero(pQuotient); *pRemainder = *pValue1; /* * Do the division. */ if (RTUInt32IsLargerOrEqual(pRemainder, pValue2)) { for (;;) { if (RTUInt32IsLargerOrEqual(pRemainder, &NormDivisor)) { RTUInt32AssignSub(pRemainder, &NormDivisor); RTUInt32AssignOrBit(pQuotient, iBitAdder); } if (RTUInt32IsSmaller(pRemainder, pValue2)) break; RTUInt32AssignShiftRight(&NormDivisor, 1); iBitAdder--; } } } return pQuotient; } /** @} */ RT_C_DECLS_END #endif /* !IPRT_INCLUDED_uint32_h */