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

1.1     ! maekawa     1: /* mpfr_out_str -- output a floating-point number to a stream
        !             2:
        !             3: Copyright (C) 1999 PolKA project, Inria Lorraine and Loria
        !             4:
        !             5: This file is part of the MPFR Library.
        !             6:
        !             7: The MPFR Library is free software; you can redistribute it and/or modify
        !             8: it under the terms of the GNU Library General Public License as published by
        !             9: the Free Software Foundation; either version 2 of the License, or (at your
        !            10: option) any later version.
        !            11:
        !            12: The MPFR Library is distributed in the hope that it will be useful, but
        !            13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
        !            14: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
        !            15: License for more details.
        !            16:
        !            17: You should have received a copy of the GNU Library General Public License
        !            18: along with the MPFR Library; see the file COPYING.LIB.  If not, write to
        !            19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
        !            20: MA 02111-1307, USA. */
        !            21:
        !            22: #include <stdio.h>
        !            23: #include <math.h>
        !            24: #include "gmp.h"
        !            25: #include "gmp-impl.h"
        !            26: #include "mpfr.h"
        !            27:
        !            28: size_t
        !            29: #if __STDC__
        !            30: mpfr_out_str (FILE *stream, int base, size_t n_digits, mpfr_srcptr op,
        !            31:              unsigned char rnd_mode)
        !            32: #else
        !            33: mpfr_out_str (stream, base, n_digits, op, rnd_mode)
        !            34:      FILE *stream;
        !            35:      int base;
        !            36:      size_t n_digits;
        !            37:      mpfr_srcptr op;
        !            38:      unsigned char rnd_mode;
        !            39: #endif
        !            40: {
        !            41:   char *s,*s0; size_t l; mp_exp_t e;
        !            42:
        !            43:   if (FLAG_NAN(op)) { fprintf(stream, "NaN"); return 3; }
        !            44:   if (!NOTZERO(op)) { fprintf(stream, "0"); return 1; }
        !            45:
        !            46:   s = mpfr_get_str(NULL, &e, base, n_digits, op, rnd_mode);
        !            47:   s0 = s;
        !            48:   /* for op=3.1416 we have s = "31416" and e = 1 */
        !            49:
        !            50:   l = strlen(s)+1;
        !            51:   if (*s == '-') fputc(*s++, stream);
        !            52:
        !            53:   fputc(*s++, stream); e--; /* writes leading digit */
        !            54:   fputc('.', stream);       /* decimal point */
        !            55:   fputs(s, stream);         /* rest of mantissa */
        !            56:   if (e) {
        !            57:     fputc((base>10) ? '@' : 'e', stream); l++;
        !            58:     sprintf(s, "%ld", e);
        !            59:     l += strlen(s);
        !            60:     fprintf(stream, "%s", s);
        !            61:   }
        !            62:
        !            63:   (*_mp_free_func)(s0, l);
        !            64:   return l;
        !            65: }