values.h
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上传日期:2009-04-28
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文件大小:2k
- /* Old compatibility names for <limits.h> and <float.h> constants.
- Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
- The GNU C Library is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License as published by the Free Software Foundation; either
- version 2.1 of the License, or (at your option) any later version.
- The GNU C 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
- Lesser General Public License for more details.
- You should have received a copy of the GNU Lesser General Public
- License along with the GNU C Library; if not, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- /* This interface is obsolete. New programs should use
- <limits.h> and/or <float.h> instead of <values.h>. */
- #ifndef _VALUES_H
- #define _VALUES_H 1
- #include <features.h>
- #include <limits.h>
- #define _TYPEBITS(type) (sizeof (type) * CHAR_BIT)
- #define CHARBITS _TYPEBITS (char)
- #define SHORTBITS _TYPEBITS (short int)
- #define INTBITS _TYPEBITS (int)
- #define LONGBITS _TYPEBITS (long int)
- #define PTRBITS _TYPEBITS (char *)
- #define DOUBLEBITS _TYPEBITS (double)
- #define FLOATBITS _TYPEBITS (float)
- #define MINSHORT SHRT_MIN
- #define MININT INT_MIN
- #define MINLONG LONG_MIN
- #define MAXSHORT SHRT_MAX
- #define MAXINT INT_MAX
- #define MAXLONG LONG_MAX
- #define HIBITS MINSHORT
- #define HIBITL MINLONG
- #include <float.h>
- #define MAXDOUBLE DBL_MAX
- #define MAXFLOAT FLT_MAX
- #define MINDOUBLE DBL_MIN
- #define MINFLOAT FLT_MIN
- #define DMINEXP DBL_MIN_EXP
- #define FMINEXP FLT_MIN_EXP
- #define DMAXEXP DBL_MAX_EXP
- #define FMAXEXP FLT_MAX_EXP
- #ifdef __USE_MISC
- /* Some systems define this name instead of CHAR_BIT or CHARBITS. */
- # define BITSPERBYTE CHAR_BIT
- #endif
- #endif /* values.h */