123 lines
2.7 KiB
C
123 lines
2.7 KiB
C
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <ansidecl.h>
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#include <stdio.h>
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#include <math.h>
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#include <printf.h>
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#include "ieee754.h"
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#define outchar(x) \
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do \
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{ \
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register CONST int outc = (x); \
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if (putc (outc, s) == EOF) \
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return -1; \
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else \
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++done; \
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} while (0)
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#ifndef HANDLE_SPECIAL
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#ifdef __GNUC__
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__inline
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#endif
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static int
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DEFUN(special_ieee754, (s, info, fpnum),
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FILE *s AND CONST struct printf_info *info AND LONG_DOUBLE fpnum)
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{
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int is_neg;
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CONST char *string;
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if (__isnan ((double) fpnum))
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{
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string = "NaN";
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is_neg = 0;
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}
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else if (__isinf ((double) fpnum))
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{
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string = "Inf";
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is_neg = fpnum < 0;
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}
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else
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return 0;
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{
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size_t done = 0;
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int width = info->prec > info->width ? info->prec : info->width;
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if (is_neg || info->showsign || info->space)
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--width;
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width -= 3;
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if (!info->left)
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while (width-- > 0)
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outchar (' ');
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if (is_neg)
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outchar ('-');
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else if (info->showsign)
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outchar ('+');
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else if (info->space)
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outchar (' ');
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{
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register size_t len = 3;
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while (len-- > 0)
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outchar (*string++);
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}
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if (info->left)
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while (width-- > 0)
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outchar (' ');
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return done;
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}
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}
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#define HANDLE_SPECIAL(done, s, info, fpnum) \
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{ \
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int more_done = special_ieee754 (s, info, fpnum); \
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if (more_done == -1) \
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return -1; \
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else if (more_done != 0) \
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return done + more_done; \
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}
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#endif
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#ifndef IS_NEGATIVE
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#ifdef __GNUC__
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__inline
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#endif
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static int
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DEFUN(is_neg_ieee754, (num), register LONG_DOUBLE num)
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{
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union ieee754_double u;
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u.d = (double) num;
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return u.ieee.negative;
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}
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#define IS_NEGATIVE(num) is_neg_ieee754 (num)
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#endif
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#include <../sysdeps/generic/printf_fp.c>
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