prlong.h
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- /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
- /* ***** BEGIN LICENSE BLOCK *****
- * Version: MPL 1.1/GPL 2.0/LGPL 2.1
- *
- * The contents of this file are subject to the Mozilla Public License Version
- * 1.1 (the "License"); you may not use this file except in compliance with
- * the License. You may obtain a copy of the License at
- * http://www.mozilla.org/MPL/
- *
- * Software distributed under the License is distributed on an "AS IS" basis,
- * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
- * for the specific language governing rights and limitations under the
- * License.
- *
- * The Original Code is the Netscape Portable Runtime (NSPR).
- *
- * The Initial Developer of the Original Code is
- * Netscape Communications Corporation.
- * Portions created by the Initial Developer are Copyright (C) 1998-2000
- * the Initial Developer. All Rights Reserved.
- *
- * Contributor(s):
- *
- * Alternatively, the contents of this file may be used under the terms of
- * either the GNU General Public License Version 2 or later (the "GPL"), or
- * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
- * in which case the provisions of the GPL or the LGPL are applicable instead
- * of those above. If you wish to allow use of your version of this file only
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- * use your version of this file under the terms of the MPL, indicate your
- * decision by deleting the provisions above and replace them with the notice
- * and other provisions required by the GPL or the LGPL. If you do not delete
- * the provisions above, a recipient may use your version of this file under
- * the terms of any one of the MPL, the GPL or the LGPL.
- *
- * ***** END LICENSE BLOCK ***** */
- /*
- ** File: prlong.h
- ** Description: Portable access to 64 bit numerics
- **
- ** Long-long (64-bit signed integer type) support. Some C compilers
- ** don't support 64 bit integers yet, so we use these macros to
- ** support both machines that do and don't.
- **/
- #ifndef prlong_h___
- #define prlong_h___
- #include "prtypes.h"
- PR_BEGIN_EXTERN_C
- /***********************************************************************
- ** DEFINES: LL_MaxInt
- ** LL_MinInt
- ** LL_Zero
- ** LL_MaxUint
- ** DESCRIPTION:
- ** Various interesting constants and static variable
- ** initializer
- ***********************************************************************/
- #if defined(HAVE_WATCOM_BUG_2)
- PRInt64 __pascal __loadds __export
- LL_MaxInt(void);
- PRInt64 __pascal __loadds __export
- LL_MinInt(void);
- PRInt64 __pascal __loadds __export
- LL_Zero(void);
- PRUint64 __pascal __loadds __export
- LL_MaxUint(void);
- #else
- NSPR_API(PRInt64) LL_MaxInt(void);
- NSPR_API(PRInt64) LL_MinInt(void);
- NSPR_API(PRInt64) LL_Zero(void);
- NSPR_API(PRUint64) LL_MaxUint(void);
- #endif
- #if defined(HAVE_LONG_LONG)
- #if PR_BYTES_PER_LONG == 8
- #define LL_MAXINT 9223372036854775807L
- #define LL_MININT (-LL_MAXINT - 1L)
- #define LL_ZERO 0L
- #define LL_MAXUINT 18446744073709551615UL
- #define LL_INIT(hi, lo) ((hi ## L << 32) + lo ## L)
- #elif (defined(WIN32) || defined(WIN16)) && !defined(__GNUC__)
- #define LL_MAXINT 9223372036854775807i64
- #define LL_MININT (-LL_MAXINT - 1i64)
- #define LL_ZERO 0i64
- #define LL_MAXUINT 18446744073709551615ui64
- #define LL_INIT(hi, lo) ((hi ## i64 << 32) + lo ## i64)
- #else
- #define LL_MAXINT 9223372036854775807LL
- #define LL_MININT (-LL_MAXINT - 1LL)
- #define LL_ZERO 0LL
- #define LL_MAXUINT 18446744073709551615ULL
- #define LL_INIT(hi, lo) ((hi ## LL << 32) + lo ## LL)
- #endif
- /***********************************************************************
- ** MACROS: LL_*
- ** DESCRIPTION:
- ** The following macros define portable access to the 64 bit
- ** math facilities.
- **
- ***********************************************************************/
- /***********************************************************************
- ** MACROS: LL_<relational operators>
- **
- ** LL_IS_ZERO Test for zero
- ** LL_EQ Test for equality
- ** LL_NE Test for inequality
- ** LL_GE_ZERO Test for zero or positive
- ** LL_CMP Compare two values
- ***********************************************************************/
- #define LL_IS_ZERO(a) ((a) == 0)
- #define LL_EQ(a, b) ((a) == (b))
- #define LL_NE(a, b) ((a) != (b))
- #define LL_GE_ZERO(a) ((a) >= 0)
- #define LL_CMP(a, op, b) ((PRInt64)(a) op (PRInt64)(b))
- #define LL_UCMP(a, op, b) ((PRUint64)(a) op (PRUint64)(b))
- /***********************************************************************
- ** MACROS: LL_<logical operators>
- **
- ** LL_AND Logical and
- ** LL_OR Logical or
- ** LL_XOR Logical exclusion
- ** LL_OR2 A disgusting deviation
- ** LL_NOT Negation (one's complement)
- ***********************************************************************/
- #define LL_AND(r, a, b) ((r) = (a) & (b))
- #define LL_OR(r, a, b) ((r) = (a) | (b))
- #define LL_XOR(r, a, b) ((r) = (a) ^ (b))
- #define LL_OR2(r, a) ((r) = (r) | (a))
- #define LL_NOT(r, a) ((r) = ~(a))
- /***********************************************************************
- ** MACROS: LL_<mathematical operators>
- **
- ** LL_NEG Negation (two's complement)
- ** LL_ADD Summation (two's complement)
- ** LL_SUB Difference (two's complement)
- ***********************************************************************/
- #define LL_NEG(r, a) ((r) = -(a))
- #define LL_ADD(r, a, b) ((r) = (a) + (b))
- #define LL_SUB(r, a, b) ((r) = (a) - (b))
- /***********************************************************************
- ** MACROS: LL_<mathematical operators>
- **
- ** LL_MUL Product (two's complement)
- ** LL_DIV Quotient (two's complement)
- ** LL_MOD Modulus (two's complement)
- ***********************************************************************/
- #define LL_MUL(r, a, b) ((r) = (a) * (b))
- #define LL_DIV(r, a, b) ((r) = (a) / (b))
- #define LL_MOD(r, a, b) ((r) = (a) % (b))
- /***********************************************************************
- ** MACROS: LL_<shifting operators>
- **
- ** LL_SHL Shift left [0..64] bits
- ** LL_SHR Shift right [0..64] bits with sign extension
- ** LL_USHR Unsigned shift right [0..64] bits
- ** LL_ISHL Signed shift left [0..64] bits
- ***********************************************************************/
- #define LL_SHL(r, a, b) ((r) = (PRInt64)(a) << (b))
- #define LL_SHR(r, a, b) ((r) = (PRInt64)(a) >> (b))
- #define LL_USHR(r, a, b) ((r) = (PRUint64)(a) >> (b))
- #define LL_ISHL(r, a, b) ((r) = (PRInt64)(a) << (b))
- /***********************************************************************
- ** MACROS: LL_<conversion operators>
- **
- ** LL_L2I Convert to signed 32 bit
- ** LL_L2UI Convert to unsigned 32 bit
- ** LL_L2F Convert to floating point
- ** LL_L2D Convert to floating point
- ** LL_I2L Convert signed to 64 bit
- ** LL_UI2L Convert unsigned to 64 bit
- ** LL_F2L Convert float to 64 bit
- ** LL_D2L Convert float to 64 bit
- ***********************************************************************/
- #define LL_L2I(i, l) ((i) = (PRInt32)(l))
- #define LL_L2UI(ui, l) ((ui) = (PRUint32)(l))
- #define LL_L2F(f, l) ((f) = (PRFloat64)(l))
- #define LL_L2D(d, l) ((d) = (PRFloat64)(l))
- #define LL_I2L(l, i) ((l) = (PRInt64)(i))
- #define LL_UI2L(l, ui) ((l) = (PRInt64)(ui))
- #define LL_F2L(l, f) ((l) = (PRInt64)(f))
- #define LL_D2L(l, d) ((l) = (PRInt64)(d))
- /***********************************************************************
- ** MACROS: LL_UDIVMOD
- ** DESCRIPTION:
- ** Produce both a quotient and a remainder given an unsigned
- ** INPUTS: PRUint64 a: The dividend of the operation
- ** PRUint64 b: The quotient of the operation
- ** OUTPUTS: PRUint64 *qp: pointer to quotient
- ** PRUint64 *rp: pointer to remainder
- ***********************************************************************/
- #define LL_UDIVMOD(qp, rp, a, b)
- (*(qp) = ((PRUint64)(a) / (b)),
- *(rp) = ((PRUint64)(a) % (b)))
- #else /* !HAVE_LONG_LONG */
- #define LL_MAXINT LL_MaxInt()
- #define LL_MININT LL_MinInt()
- #define LL_ZERO LL_Zero()
- #define LL_MAXUINT LL_MaxUint()
- #ifdef IS_LITTLE_ENDIAN
- #define LL_INIT(hi, lo) {PR_UINT32(lo), PR_UINT32(hi)}
- #else
- #define LL_INIT(hi, lo) {PR_UINT32(hi), PR_UINT32(lo)}
- #endif
- #define LL_IS_ZERO(a) (((a).hi == 0) && ((a).lo == 0))
- #define LL_EQ(a, b) (((a).hi == (b).hi) && ((a).lo == (b).lo))
- #define LL_NE(a, b) (((a).hi != (b).hi) || ((a).lo != (b).lo))
- #define LL_GE_ZERO(a) (((a).hi >> 31) == 0)
- #define LL_CMP(a, op, b) (((a).hi == (b).hi) ? ((a).lo op (b).lo) :
- ((PRInt32)(a).hi op (PRInt32)(b).hi))
- #define LL_UCMP(a, op, b) (((a).hi == (b).hi) ? ((a).lo op (b).lo) :
- ((a).hi op (b).hi))
- #define LL_AND(r, a, b) ((r).lo = (a).lo & (b).lo,
- (r).hi = (a).hi & (b).hi)
- #define LL_OR(r, a, b) ((r).lo = (a).lo | (b).lo,
- (r).hi = (a).hi | (b).hi)
- #define LL_XOR(r, a, b) ((r).lo = (a).lo ^ (b).lo,
- (r).hi = (a).hi ^ (b).hi)
- #define LL_OR2(r, a) ((r).lo = (r).lo | (a).lo,
- (r).hi = (r).hi | (a).hi)
- #define LL_NOT(r, a) ((r).lo = ~(a).lo,
- (r).hi = ~(a).hi)
- #define LL_NEG(r, a) ((r).lo = -(PRInt32)(a).lo,
- (r).hi = -(PRInt32)(a).hi - ((r).lo != 0))
- #define LL_ADD(r, a, b) {
- PRInt64 _a, _b;
- _a = a; _b = b;
- (r).lo = _a.lo + _b.lo;
- (r).hi = _a.hi + _b.hi + ((r).lo < _b.lo);
- }
- #define LL_SUB(r, a, b) {
- PRInt64 _a, _b;
- _a = a; _b = b;
- (r).lo = _a.lo - _b.lo;
- (r).hi = _a.hi - _b.hi - (_a.lo < _b.lo);
- }
- #define LL_MUL(r, a, b) {
- PRInt64 _a, _b;
- _a = a; _b = b;
- LL_MUL32(r, _a.lo, _b.lo);
- (r).hi += _a.hi * _b.lo + _a.lo * _b.hi;
- }
- #define _lo16(a) ((a) & PR_BITMASK(16))
- #define _hi16(a) ((a) >> 16)
- #define LL_MUL32(r, a, b) {
- PRUint32 _a1, _a0, _b1, _b0, _y0, _y1, _y2, _y3;
- _a1 = _hi16(a), _a0 = _lo16(a);
- _b1 = _hi16(b), _b0 = _lo16(b);
- _y0 = _a0 * _b0;
- _y1 = _a0 * _b1;
- _y2 = _a1 * _b0;
- _y3 = _a1 * _b1;
- _y1 += _hi16(_y0); /* can't carry */
- _y1 += _y2; /* might carry */
- if (_y1 < _y2)
- _y3 += (PRUint32)(PR_BIT(16)); /* propagate */
- (r).lo = (_lo16(_y1) << 16) + _lo16(_y0);
- (r).hi = _y3 + _hi16(_y1);
- }
- #define LL_UDIVMOD(qp, rp, a, b) ll_udivmod(qp, rp, a, b)
- NSPR_API(void) ll_udivmod(PRUint64 *qp, PRUint64 *rp, PRUint64 a, PRUint64 b);
- #define LL_DIV(r, a, b) {
- PRInt64 _a, _b;
- PRUint32 _negative = (PRInt32)(a).hi < 0;
- if (_negative) {
- LL_NEG(_a, a);
- } else {
- _a = a;
- }
- if ((PRInt32)(b).hi < 0) {
- _negative ^= 1;
- LL_NEG(_b, b);
- } else {
- _b = b;
- }
- LL_UDIVMOD(&(r), 0, _a, _b);
- if (_negative)
- LL_NEG(r, r);
- }
- #define LL_MOD(r, a, b) {
- PRInt64 _a, _b;
- PRUint32 _negative = (PRInt32)(a).hi < 0;
- if (_negative) {
- LL_NEG(_a, a);
- } else {
- _a = a;
- }
- if ((PRInt32)(b).hi < 0) {
- LL_NEG(_b, b);
- } else {
- _b = b;
- }
- LL_UDIVMOD(0, &(r), _a, _b);
- if (_negative)
- LL_NEG(r, r);
- }
- #define LL_SHL(r, a, b) {
- if (b) {
- PRInt64 _a;
- _a = a;
- if ((b) < 32) {
- (r).lo = _a.lo << ((b) & 31);
- (r).hi = (_a.hi << ((b) & 31)) | (_a.lo >> (32 - (b)));
- } else {
- (r).lo = 0;
- (r).hi = _a.lo << ((b) & 31);
- }
- } else {
- (r) = (a);
- }
- }
- /* a is an PRInt32, b is PRInt32, r is PRInt64 */
- #define LL_ISHL(r, a, b) {
- if (b) {
- PRInt64 _a;
- _a.lo = (a);
- _a.hi = 0;
- if ((b) < 32) {
- (r).lo = (a) << ((b) & 31);
- (r).hi = ((a) >> (32 - (b)));
- } else {
- (r).lo = 0;
- (r).hi = (a) << ((b) & 31);
- }
- } else {
- (r).lo = (a);
- (r).hi = 0;
- }
- }
- #define LL_SHR(r, a, b) {
- if (b) {
- PRInt64 _a;
- _a = a;
- if ((b) < 32) {
- (r).lo = (_a.hi << (32 - (b))) | (_a.lo >> ((b) & 31));
- (r).hi = (PRInt32)_a.hi >> ((b) & 31);
- } else {
- (r).lo = (PRInt32)_a.hi >> ((b) & 31);
- (r).hi = (PRInt32)_a.hi >> 31;
- }
- } else {
- (r) = (a);
- }
- }
- #define LL_USHR(r, a, b) {
- if (b) {
- PRInt64 _a;
- _a = a;
- if ((b) < 32) {
- (r).lo = (_a.hi << (32 - (b))) | (_a.lo >> ((b) & 31));
- (r).hi = _a.hi >> ((b) & 31);
- } else {
- (r).lo = _a.hi >> ((b) & 31);
- (r).hi = 0;
- }
- } else {
- (r) = (a);
- }
- }
- #define LL_L2I(i, l) ((i) = (l).lo)
- #define LL_L2UI(ui, l) ((ui) = (l).lo)
- #define LL_L2F(f, l) { double _d; LL_L2D(_d, l); (f) = (PRFloat64)_d; }
- #define LL_L2D(d, l) {
- int _negative;
- PRInt64 _absval;
-
- _negative = (l).hi >> 31;
- if (_negative) {
- LL_NEG(_absval, l);
- } else {
- _absval = l;
- }
- (d) = (double)_absval.hi * 4.294967296e9 + _absval.lo;
- if (_negative)
- (d) = -(d);
- }
- #define LL_I2L(l, i) { PRInt32 _i = ((PRInt32)(i)) >> 31; (l).lo = (i); (l).hi = _i; }
- #define LL_UI2L(l, ui) ((l).lo = (ui), (l).hi = 0)
- #define LL_F2L(l, f) { double _d = (double)f; LL_D2L(l, _d); }
- #define LL_D2L(l, d) {
- int _negative;
- double _absval, _d_hi;
- PRInt64 _lo_d;
-
- _negative = ((d) < 0);
- _absval = _negative ? -(d) : (d);
-
- (l).hi = _absval / 4.294967296e9;
- (l).lo = 0;
- LL_L2D(_d_hi, l);
- _absval -= _d_hi;
- _lo_d.hi = 0;
- if (_absval < 0) {
- _lo_d.lo = -_absval;
- LL_SUB(l, l, _lo_d);
- } else {
- _lo_d.lo = _absval;
- LL_ADD(l, l, _lo_d);
- }
-
- if (_negative)
- LL_NEG(l, l);
- }
- #endif /* !HAVE_LONG_LONG */
- PR_END_EXTERN_C
- #endif /* prlong_h___ */