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Annotation of OpenXM_contrib/gmp/mpfr/print_raw.c, Revision 1.1

1.1     ! maekawa     1: /* mpfr_print_raw -- print the internal binary representation of a
        !             2:                      floating-point number
        !             3:
        !             4: Copyright (C) 1999 PolKA project, Inria Lorraine and Loria
        !             5:
        !             6: This file is part of the MPFR Library.
        !             7:
        !             8: The MPFR Library is free software; you can redistribute it and/or modify
        !             9: it under the terms of the GNU Library General Public License as published by
        !            10: the Free Software Foundation; either version 2 of the License, or (at your
        !            11: option) any later version.
        !            12:
        !            13: The MPFR Library is distributed in the hope that it will be useful, but
        !            14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            15: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
        !            16: License for more details.
        !            17:
        !            18: You should have received a copy of the GNU Library General Public License
        !            19: along with the MPFR Library; see the file COPYING.LIB.  If not, write to
        !            20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            21: MA 02111-1307, USA. */
        !            22:
        !            23: #include <stdio.h>
        !            24: #include "gmp.h"
        !            25: #include "gmp-impl.h"
        !            26: #include "mpfr.h"
        !            27:
        !            28: void
        !            29: #if __STDC__
        !            30: mpfr_get_str_raw(char *digit_ptr, mpfr_srcptr x)
        !            31: #else
        !            32: mpfr_get_str_raw(digit_ptr, x)
        !            33:      char *digit_ptr;
        !            34:      mpfr_srcptr x;
        !            35: #endif
        !            36: {
        !            37:   mp_limb_t *mx, wd, t; long ex, sx, k, l, p;
        !            38:
        !            39:   mx = MANT(x);
        !            40:   ex = EXP(x);
        !            41:   p = PREC(x);
        !            42:
        !            43:   if (SIGN(x) < 0) { *digit_ptr = '-'; digit_ptr++; }
        !            44:   sprintf(digit_ptr, "0."); digit_ptr += 2;
        !            45:
        !            46:   sx = 1+(p-1)/mp_bits_per_limb; /* number of significant limbs */
        !            47:   for (k = sx - 1; k >= 0 ; k--)
        !            48:     {
        !            49:       wd = mx[k];
        !            50:       t = ((mp_limb_t)1) << (BITS_PER_MP_LIMB - 1);
        !            51:       for (l = BITS_PER_MP_LIMB - 1; l>=0; l--)
        !            52:        {
        !            53:          if (wd & t)
        !            54:            { *digit_ptr = '1'; digit_ptr++; }
        !            55:          else
        !            56:            { *digit_ptr = '0'; digit_ptr++; }
        !            57:          t >>= 1;
        !            58:          if (--p==0) { *digit_ptr = '['; digit_ptr++; }
        !            59:        }
        !            60:     }
        !            61:   sprintf(digit_ptr, "]E%ld", ex);
        !            62: }
        !            63:
        !            64: void
        !            65: #if __STDC__
        !            66: mpfr_print_raw(mpfr_srcptr x)
        !            67: #else
        !            68: mpfr_print_raw(x)
        !            69:      mpfr_srcptr x;
        !            70: #endif
        !            71: {
        !            72:   char *str;
        !            73:
        !            74:   if (FLAG_NAN(x)) printf("NaN");
        !            75:   else if (!NOTZERO(x)) printf("0");
        !            76:   else {
        !            77:      /* 3 char for sign + 0 + binary point
        !            78:        + ABSSIZE(x) * BITS_PER_MP_LIMB for mantissa
        !            79:        + 2 for brackets in mantissa
        !            80:        + 1 for 'E'
        !            81:        + 11 for exponent (including sign)
        !            82:        = 17 + ABSSIZE(x) * BITS_PER_MP_LIMB
        !            83:       */
        !            84:      str = (char *) malloc((17 + ABSSIZE(x) * BITS_PER_MP_LIMB)*sizeof(char));
        !            85:      mpfr_get_str_raw(str, x);
        !            86:
        !            87:      printf("%s", str);
        !            88:      free(str);
        !            89:   }
        !            90: }
        !            91: