145 lines
3.0 KiB
C++
145 lines
3.0 KiB
C++
// This may look like C code, but it is really -*- C++ -*-
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/*
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Copyright (C) 1988, 1992 Free Software Foundation
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written by Doug Lea (dl@rocky.oswego.edu)
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This file is part of the GNU C++ Library. This library is free
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software; you can redistribute it and/or modify it under the terms of
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the GNU Library General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at your
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option) any later version. This library is distributed in the hope
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that it will be useful, but WITHOUT ANY WARRANTY; without even the
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implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
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PURPOSE. See the GNU Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with this library; if not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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/*
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arithmetic, etc. functions on built in types
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*/
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#ifndef _builtin_h
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#ifdef __GNUG__
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#pragma interface
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#endif
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#define _builtin_h 1
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#include <stddef.h>
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#include <std.h>
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#include <math.h>
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#ifdef __GNUG__
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#define _VOLATILE_VOID volatile void
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#else
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#define _VOLATILE_VOID void
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#endif
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typedef void (*one_arg_error_handler_t)(const char*);
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typedef void (*two_arg_error_handler_t)(const char*, const char*);
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long gcd(long, long);
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long lg(unsigned long);
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double pow(double, long);
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long pow(long, long);
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extern "C" double start_timer();
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extern "C" double return_elapsed_time(double last_time = 0.0);
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char* dtoa(double x, char cvt = 'g', int width = 0, int prec = 6);
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unsigned int hashpjw(const char*);
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unsigned int multiplicativehash(int);
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unsigned int foldhash(double);
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extern _VOLATILE_VOID default_one_arg_error_handler(const char*);
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extern _VOLATILE_VOID default_two_arg_error_handler(const char*, const char*);
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extern two_arg_error_handler_t lib_error_handler;
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extern two_arg_error_handler_t
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set_lib_error_handler(two_arg_error_handler_t f);
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#if !defined(IV)
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#if ! _G_MATH_H_INLINES /* hpux and SCO define this in math.h */
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inline double abs(double arg)
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{
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return (arg < 0.0)? -arg : arg;
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}
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#endif
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inline float abs(float arg)
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{
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return (arg < 0.0)? -arg : arg;
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}
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inline short abs(short arg)
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{
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return (arg < 0)? -arg : arg;
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}
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inline long abs(long arg)
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{
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return (arg < 0)? -arg : arg;
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}
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inline int sign(long arg)
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{
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return (arg == 0) ? 0 : ( (arg > 0) ? 1 : -1 );
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}
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inline int sign(double arg)
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{
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return (arg == 0.0) ? 0 : ( (arg > 0.0) ? 1 : -1 );
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}
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inline long sqr(long arg)
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{
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return arg * arg;
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}
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#if ! _G_MATH_H_INLINES /* hpux and SCO define this in math.h */
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inline double sqr(double arg)
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{
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return arg * arg;
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}
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#endif
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inline int even(long arg)
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{
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return !(arg & 1);
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}
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inline int odd(long arg)
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{
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return (arg & 1);
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}
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inline long lcm(long x, long y)
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{
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return x / gcd(x, y) * y;
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}
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inline void (setbit)(long& x, long b)
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{
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x |= (1 << b);
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}
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inline void clearbit(long& x, long b)
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{
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x &= ~(1 << b);
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}
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inline int testbit(long x, long b)
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{
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return ((x & (1 << b)) != 0);
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}
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#endif
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#endif
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