/* Copyright (C) 1988 Free Software Foundation written by Doug Lea (dl@rocky.oswego.edu) This file is part of the GNU C++ Library. This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ #ifndef _VALUES_H #define _VALUES_H 1 #define BITSPERBYTE 8 #define BITS(type) (BITSPERBYTE * (int)sizeof(type)) /* Rename the above to __BITS so it doesn't intrude on users' namespace? */ #define CHARBITS BITS(char) #define SHORTBITS BITS(short) #define INTBITS BITS(int) #define LONGBITS BITS(long) #define PTRBITS BITS(char*) #define DOUBLEBITS BITS(double) #define FLOATBITS BITS(float) #define MINSHORT ((short)(1 << (SHORTBITS - 1))) #define MININT (1 << (INTBITS - 1)) #define MINLONG (1L << (LONGBITS - 1)) #define MAXSHORT ((short)~MINSHORT) #define MAXINT (~MININT) #define MAXLONG (~MINLONG) #define HIBITS MINSHORT #define HIBITL MINLONG #if defined(__sun__) || defined(hp300) || defined(hpux) || defined(masscomp) || defined(sgi) || defined (__mc68000__) #ifdef masscomp #define MAXDOUBLE \ ({ \ double maxdouble_val; \ \ __asm ("fmove%.d #0x7fefffffffffffff,%0" /* Max double */ \ : "=f" (maxdouble_val) \ : /* no inputs */); \ maxdouble_val; \ }) #define MAXFLOAT ((float) 3.40e+38) #else #define MAXDOUBLE 1.79769313486231470e+308 #define MAXFLOAT ((float)3.40282346638528860e+38) #endif #define MINDOUBLE 4.94065645841246544e-324 #define MINFLOAT ((float)1.40129846432481707e-45) #define _IEEE 1 #define _DEXPLEN 11 #define _FEXPLEN 8 #define _HIDDENBIT 1 #define DMINEXP (-(DMAXEXP + DSIGNIF - _HIDDENBIT - 3)) #define FMINEXP (-(FMAXEXP + FSIGNIF - _HIDDENBIT - 3)) #define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE) #define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE) #elif defined(sony) #define MAXDOUBLE 1.79769313486231470e+308 #define MAXFLOAT ((float)3.40282346638528860e+38) #define MINDOUBLE 2.2250738585072010e-308 #define MINFLOAT ((float)1.17549435e-38) #define _IEEE 1 #define _DEXPLEN 11 #define _FEXPLEN 8 #define _HIDDENBIT 1 #define DMINEXP (-(DMAXEXP + DSIGNIF - _HIDDENBIT - 3)) #define FMINEXP (-(FMAXEXP + FSIGNIF - _HIDDENBIT - 3)) #define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE) #define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE) #elif defined(sequent) extern double _maxdouble, _mindouble; extern float _maxfloat, _minfloat; #define MAXDOUBLE _maxdouble #define MAXFLOAT _maxfloat #define MINDOUBLE _mindouble #define MINFLOAT _minfloat #define _IEEE 1 #define _DEXPLEN 11 #define _FEXPLEN 8 #define _HIDDENBIT 1 #define DMINEXP (-(DMAXEXP - 3)) #define FMINEXP (-(FMAXEXP - 3)) #define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE) #define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE) #elif defined(__i386__) #define MAXDOUBLE 1.79769313486231570e+308 #if 0 #define MAXFLOAT ((float)3.40282346638528860e+38) #define MINDOUBLE 2.22507385850720140e-308 #define MINFLOAT ((float)1.17549435082228750e-38) #else #define MAXFLOAT 3.40282347e+38F #define MINDOUBLE 4.94065645841246544e-324 #define MINFLOAT 1.40129846e-45F #endif #define _IEEE 1 #define _DEXPLEN 11 #define _FEXPLEN 8 #define _HIDDENBIT 1 #define DMINEXP (-DMAXEXP) #define FMINEXP (-FMAXEXP) #define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE) #define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE) /* from Andrew Klossner */ #elif defined(m88k) /* These are "good" guesses ... I'll figure out the true mins and maxes later, at the time I find out the mins and maxes that the compiler can tokenize. */ #define MAXDOUBLE 1.79769313486231e+308 #define MAXFLOAT ((float)3.40282346638528e+38) #define MINDOUBLE 2.22507385850720e-308 #define MINFLOAT ((float)1.17549435082228e-38) #define _IEEE 1 #define _DEXPLEN 11 #define _FEXPLEN 8 #define _HIDDENBIT 1 #define DMINEXP (1-DMAXEXP) #define FMINEXP (1-FMAXEXP) #define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE) #define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE) #elif defined(convex) #define MAXDOUBLE 8.9884656743115785e+306 #define MAXFLOAT ((float) 1.70141173e+38) #define MINDOUBLE 5.5626846462680035e-308 #define MINFLOAT ((float) 2.93873588e-39) #define _IEEE 0 #define _DEXPLEN 11 #define _FEXPLEN 8 #define _HIDDENBIT 1 #define DMINEXP (-DMAXEXP) #define FMINEXP (-FMAXEXP) #define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE) #define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE) /* #elif defined(__vax__) use vax versions by default -- they seem to be the most conservative */ #else #define MAXDOUBLE 1.701411834604692293e+38 #define MINDOUBLE (2.938735877055718770e-39) #define MAXFLOAT 1.7014117331926443e+38 #define MINFLOAT 2.9387358770557188e-39 #define _IEEE 0 #define _DEXPLEN 8 #define _FEXPLEN 8 #define _HIDDENBIT 1 #define DMINEXP (-DMAXEXP) #define FMINEXP (-FMAXEXP) #define DMAXEXP ((1 << _DEXPLEN - 1) - 1 + _IEEE) #define FMAXEXP ((1 << _FEXPLEN - 1) - 1 + _IEEE) #endif #define DSIGNIF (DOUBLEBITS - _DEXPLEN + _HIDDENBIT - 1) #define FSIGNIF (FLOATBITS - _FEXPLEN + _HIDDENBIT - 1) #define DMAXPOWTWO ((double)(1L << LONGBITS -2)*(1L << DSIGNIF - LONGBITS +1)) #define FMAXPOWTWO ((float)(1L << FSIGNIF - 1)) #endif