mirror of https://github.com/macssh/macssh.git
92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
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/* mpfr_print_raw -- print the internal binary representation of a
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floating-point number
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Copyright (C) 1999 PolKA project, Inria Lorraine and Loria
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This file is part of the MPFR Library.
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The MPFR Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Library General Public License as published by
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the Free Software Foundation; either version 2 of the License, or (at your
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option) any later version.
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The MPFR Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public
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License for more details.
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You should have received a copy of the GNU Library General Public License
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along with the MPFR Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
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MA 02111-1307, USA. */
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#include <stdio.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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#include "mpfr.h"
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void
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#if __STDC__
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mpfr_get_str_raw(char *digit_ptr, mpfr_srcptr x)
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#else
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mpfr_get_str_raw(digit_ptr, x)
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char *digit_ptr;
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mpfr_srcptr x;
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#endif
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{
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mp_limb_t *mx, wd, t; long ex, sx, k, l, p;
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mx = MANT(x);
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ex = EXP(x);
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p = PREC(x);
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if (SIGN(x) < 0) { *digit_ptr = '-'; digit_ptr++; }
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sprintf(digit_ptr, "0."); digit_ptr += 2;
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sx = 1+(p-1)/mp_bits_per_limb; /* number of significant limbs */
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for (k = sx - 1; k >= 0 ; k--)
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{
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wd = mx[k];
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t = ((mp_limb_t)1) << (BITS_PER_MP_LIMB - 1);
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for (l = BITS_PER_MP_LIMB - 1; l>=0; l--)
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{
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if (wd & t)
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{ *digit_ptr = '1'; digit_ptr++; }
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else
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{ *digit_ptr = '0'; digit_ptr++; }
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t >>= 1;
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if (--p==0) { *digit_ptr = '['; digit_ptr++; }
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}
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}
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sprintf(digit_ptr, "]E%ld", ex);
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}
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void
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#if __STDC__
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mpfr_print_raw(mpfr_srcptr x)
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#else
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mpfr_print_raw(x)
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mpfr_srcptr x;
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#endif
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{
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char *str;
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if (FLAG_NAN(x)) printf("NaN");
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else if (!NOTZERO(x)) printf("0");
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else {
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/* 3 char for sign + 0 + binary point
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+ ABSSIZE(x) * BITS_PER_MP_LIMB for mantissa
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+ 2 for brackets in mantissa
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+ 1 for 'E'
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+ 11 for exponent (including sign)
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= 17 + ABSSIZE(x) * BITS_PER_MP_LIMB
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*/
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str = (char *) malloc((17 + ABSSIZE(x) * BITS_PER_MP_LIMB)*sizeof(char));
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mpfr_get_str_raw(str, x);
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printf("%s", str);
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free(str);
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}
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}
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