floatio.h

来自「用于嵌入式Linux系统的标准C的库函数」· C头文件 代码 · 共 33 行

/*
 * Copyright (c) 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *	%W% (Berkeley) %G%
 */

/*
 * Floating point scanf/printf (input/output) definitions.
 */

#ifdef _NO_LONGDBL
/* 11-bit exponent (VAX G floating point) is 308 decimal digits */
#define	MAXEXP		308
#else  /* !_NO_LONGDBL */
/* 15-bit exponent (Intel extended floating point) is 4932 decimal digits */
#define MAXEXP          4932
#endif /* !_NO_LONGDBL */
/* 128 bit fraction takes up 39 decimal digits; max reasonable precision */
#define	MAXFRACT	39