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jslong.h
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jslong.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 Mozilla Communicator client code, released
* March 31, 1998.
*
* The Initial Developer of the Original Code is
* Netscape Communications Corporation.
* Portions created by the Initial Developer are Copyright (C) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either of 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
* under the terms of either the GPL or the LGPL, and not to allow others to
* 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: jslong.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 jslong_h___
#define jslong_h___
#include "jstypes.h"
JS_BEGIN_EXTERN_C
#define JSLL_INIT(hi, lo) ((((JSInt64)(hi)) << 32) + (JSInt64)(lo))
/***********************************************************************
** MACROS: JSLL_*
** DESCRIPTION:
** The following macros define portable access to the 64 bit
** math facilities.
**
***********************************************************************/
/***********************************************************************
** MACROS: JSLL_<relational operators>
**
** JSLL_IS_ZERO Test for zero
** JSLL_EQ Test for equality
** JSLL_NE Test for inequality
** JSLL_GE_ZERO Test for zero or positive
** JSLL_CMP Compare two values
***********************************************************************/
#define JSLL_IS_ZERO(a) ((a) == 0)
#define JSLL_EQ(a, b) ((a) == (b))
#define JSLL_NE(a, b) ((a) != (b))
#define JSLL_GE_ZERO(a) ((a) >= 0)
#define JSLL_CMP(a, op, b) ((JSInt64)(a) op (JSInt64)(b))
#define JSLL_UCMP(a, op, b) ((JSUint64)(a) op (JSUint64)(b))
/***********************************************************************
** MACROS: JSLL_<logical operators>
**
** JSLL_AND Logical and
** JSLL_OR Logical or
** JSLL_XOR Logical exclusion
** JSLL_OR2 A disgusting deviation
** JSLL_NOT Negation (one's compliment)
***********************************************************************/
#define JSLL_AND(r, a, b) ((r) = (a) & (b))
#define JSLL_OR(r, a, b) ((r) = (a) | (b))
#define JSLL_XOR(r, a, b) ((r) = (a) ^ (b))
#define JSLL_OR2(r, a) ((r) = (r) | (a))
#define JSLL_NOT(r, a) ((r) = ~(a))
/***********************************************************************
** MACROS: JSLL_<mathematical operators>
**
** JSLL_NEG Negation (two's compliment)
** JSLL_ADD Summation (two's compliment)
** JSLL_SUB Difference (two's compliment)
***********************************************************************/
#define JSLL_NEG(r, a) ((r) = -(a))
#define JSLL_ADD(r, a, b) ((r) = (a) + (b))
#define JSLL_SUB(r, a, b) ((r) = (a) - (b))
/***********************************************************************
** MACROS: JSLL_<mathematical operators>
**
** JSLL_MUL Product (two's compliment)
** JSLL_DIV Quotient (two's compliment)
** JSLL_MOD Modulus (two's compliment)
***********************************************************************/
#define JSLL_MUL(r, a, b) ((r) = (a) * (b))
#define JSLL_DIV(r, a, b) ((r) = (a) / (b))
#define JSLL_MOD(r, a, b) ((r) = (a) % (b))
/***********************************************************************
** MACROS: JSLL_<shifting operators>
**
** JSLL_SHL Shift left [0..64] bits
** JSLL_SHR Shift right [0..64] bits with sign extension
** JSLL_USHR Unsigned shift right [0..64] bits
** JSLL_ISHL Signed shift left [0..64] bits
***********************************************************************/
#define JSLL_SHL(r, a, b) ((r) = (JSInt64)(a) << (b))
#define JSLL_SHR(r, a, b) ((r) = (JSInt64)(a) >> (b))
#define JSLL_USHR(r, a, b) ((r) = (JSUint64)(a) >> (b))
#define JSLL_ISHL(r, a, b) ((r) = (JSInt64)(a) << (b))
/***********************************************************************
** MACROS: JSLL_<conversion operators>
**
** JSLL_L2I Convert to signed 32 bit
** JSLL_L2UI Convert to unsigned 32 bit
** JSLL_L2F Convert to floating point
** JSLL_L2D Convert to floating point
** JSLL_I2L Convert signed to 64 bit
** JSLL_UI2L Convert unsigned to 64 bit
** JSLL_F2L Convert float to 64 bit
** JSLL_D2L Convert float to 64 bit
***********************************************************************/
#define JSLL_L2I(i, l) ((i) = (JSInt32)(l))
#define JSLL_L2UI(ui, l) ((ui) = (JSUint32)(l))
#define JSLL_L2F(f, l) ((f) = (JSFloat64)(l))
#define JSLL_L2D(d, l) ((d) = (JSFloat64)(l))
#define JSLL_I2L(l, i) ((l) = (JSInt64)(i))
#define JSLL_UI2L(l, ui) ((l) = (JSInt64)(ui))
#define JSLL_F2L(l, f) ((l) = (JSInt64)(f))
#define JSLL_D2L(l, d) ((l) = (JSInt64)(d))
/***********************************************************************
** MACROS: JSLL_UDIVMOD
** DESCRIPTION:
** Produce both a quotient and a remainder given an unsigned
** INPUTS: JSUint64 a: The dividend of the operation
** JSUint64 b: The quotient of the operation
** OUTPUTS: JSUint64 *qp: pointer to quotient
** JSUint64 *rp: pointer to remainder
***********************************************************************/
#define JSLL_UDIVMOD(qp, rp, a, b) \
(*(qp) = ((JSUint64)(a) / (b)), \
*(rp) = ((JSUint64)(a) % (b)))
JS_END_EXTERN_C
#endif /* jslong_h___ */