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: }
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