[lttng-ust.git] / snprintf / floatio.h

/*	$OpenBSD: floatio.h,v 1.4 2008/09/07 20:36:08 martynas Exp $	*/

/*-
 * Copyright (c) 1990, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * This code is derived from software contributed to Berkeley by
 * Chris Torek.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

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

/* 11-bit exponent (VAX G floating point) is 308 decimal digits */
#define	MAXEXP		308
/* 128 bit fraction takes up 39 decimal digits; max reasonable precision */
#define	MAXFRACT	39

/*
 * MAXEXPDIG is the maximum number of decimal digits needed to store a
 * floating point exponent in the largest supported format.  It should
 * be ceil(log10(LDBL_MAX_10_EXP)) or, if hexadecimal floating point
 * conversions are supported, ceil(log10(LDBL_MAX_EXP)).  But since it
 * is presently never greater than 5 in practice, we fudge it.
 */
#define	MAXEXPDIG	6
#if LDBL_MAX_EXP > 999999
#error "floating point buffers too small"
#endif

char *__hdtoa(double, const char *, int, int *, int *, char **);
char *__hldtoa(long double, const char *, int, int *, int *, char **);
char *__ldtoa(long double *, int, int, int *, int *, char **);
Commit	Line	Data
	1	/* $OpenBSD: floatio.h,v 1.4 2008/09/07 20:36:08 martynas Exp $ */
	2
	3	/*-
	4	* Copyright (c) 1990, 1993
	5	* The Regents of the University of California. All rights reserved.
	6	*
	7	* This code is derived from software contributed to Berkeley by
	8	* Chris Torek.
	9	*
	10	* Redistribution and use in source and binary forms, with or without
	11	* modification, are permitted provided that the following conditions
	12	* are met:
	13	* 1. Redistributions of source code must retain the above copyright
	14	* notice, this list of conditions and the following disclaimer.
	15	* 2. Redistributions in binary form must reproduce the above copyright
	16	* notice, this list of conditions and the following disclaimer in the
	17	* documentation and/or other materials provided with the distribution.
	18	* 3. Neither the name of the University nor the names of its contributors
	19	* may be used to endorse or promote products derived from this software
	20	* without specific prior written permission.
	21	*
	22	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	23	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	24	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	25	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	26	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	27	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	28	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	29	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	30	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	31	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	32	* SUCH DAMAGE.
	33	*/
	34
	35	/*
	36	* Floating point scanf/printf (input/output) definitions.
	37	*/
	38
	39	/* 11-bit exponent (VAX G floating point) is 308 decimal digits */
	40	#define MAXEXP 308
	41	/* 128 bit fraction takes up 39 decimal digits; max reasonable precision */
	42	#define MAXFRACT 39
	43
	44	/*
	45	* MAXEXPDIG is the maximum number of decimal digits needed to store a
	46	* floating point exponent in the largest supported format. It should
	47	* be ceil(log10(LDBL_MAX_10_EXP)) or, if hexadecimal floating point
	48	* conversions are supported, ceil(log10(LDBL_MAX_EXP)). But since it
	49	* is presently never greater than 5 in practice, we fudge it.
	50	*/
	51	#define MAXEXPDIG 6
	52	#if LDBL_MAX_EXP > 999999
	53	#error "floating point buffers too small"
	54	#endif
	55
	56	char __hdtoa(double, const char , int, int , int , char **);
	57	char __hldtoa(long double, const char , int, int , int , char **);
	58	char __ldtoa(long double , int, int, int , int , char **);