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pjs/nsprpub/pr/include/prlong.h

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C
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
* The contents of this file are subject to the Netscape Public License
* Version 1.0 (the "NPL"); you may not use this file except in
* compliance with the NPL. You may obtain a copy of the NPL at
* http://www.mozilla.org/NPL/
*
* Software distributed under the NPL is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
* for the specific language governing rights and limitations under the
* NPL.
*
* The Initial Developer of this code under the NPL is Netscape
* Communications Corporation. Portions created by Netscape are
* Copyright (C) 1998 Netscape Communications Corporation. All Rights
* Reserved.
*/
/*
** 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
** 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);
#else
PR_EXTERN(PRInt64) LL_MaxInt(void);
PR_EXTERN(PRInt64) LL_MinInt(void);
PR_EXTERN(PRInt64) LL_Zero(void);
#endif
#define LL_MAXINT LL_MaxInt()
#define LL_MININT LL_MinInt()
#define LL_ZERO LL_Zero()
#if defined(HAVE_LONG_LONG)
#if PR_BYTES_PER_LONG == 8
#define LL_INIT(hi, lo) ((hi ## L << 32) + lo ## L)
#elif defined(WIN32) || defined(WIN16)
#define LL_INIT(hi, lo) ((hi ## i64 << 32) + lo ## i64)
#else
#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 compliment)
***********************************************************************/
#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 compliment)
** LL_ADD Summation (two's compliment)
** LL_SUB Difference (two's compliment)
***********************************************************************/
#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 compliment)
** LL_DIV Quotient (two's compliment)
** LL_MOD Modulus (two's compliment)
***********************************************************************/
#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 */
#ifdef IS_LITTLE_ENDIAN
#define LL_INIT(hi, lo) {PR_INT32(lo), PR_INT32(hi)}
#else
#define LL_INIT(hi, lo) {PR_INT32(hi), PR_INT32(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) (((PRInt32)(a).hi op (PRInt32)(b).hi) || \
(((a).hi == (b).hi) && ((a).lo op (b).lo)))
#define LL_UCMP(a, op, b) (((a).hi op (b).hi) || \
(((a).hi == (b).hi) && ((a).lo op (b).lo)))
#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)
PR_EXTERN(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 = (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___ */
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