stdio/FreeBSD/floatio.h

   1 /*-
   2  * Copyright (c) 1990, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * This code is derived from software contributed to Berkeley by
   6  * Chris Torek.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  * 4. Neither the name of the University nor the names of its contributors
  17  *    may be used to endorse or promote products derived from this software
  18  *    without specific prior written permission.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  21  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  22  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  23  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  24  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  30  * SUCH DAMAGE.
  31  *
  32  *      @(#)floatio.h   8.1 (Berkeley) 6/4/93
  33  * $FreeBSD: src/lib/libc/stdio/floatio.h,v 1.6 2007/01/09 00:28:06 imp Exp $
  34  */
  35
  36 /*
  37  * Floating point scanf/printf (input/output) definitions.
  38  */
  39
  40 /*
  41  * MAXEXPDIG is the maximum number of decimal digits needed to store a
  42  * floating point exponent in the largest supported format.  It should
  43  * be ceil(log10(LDBL_MAX_10_EXP)) or, if hexadecimal floating point
  44  * conversions are supported, ceil(log10(LDBL_MAX_EXP)).  But since it
  45  * is presently never greater than 5 in practice, we fudge it.
  46  */
  47 #define MAXEXPDIG       6
  48 #if LDBL_MAX_EXP > 999999
  49 #error "floating point buffers too small"
  50 #endif
  51
  52 char *__hdtoa(double, const char *, int, int *, int *, char **);
  53 char *__hldtoa(long double, const char *, int, int *, int *, char **);
  54 char *__ldtoa(long double *, int, int, int *, int *, char **);