gonzui

    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 **);