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Annotation of OpenXM_contrib/gmp/mpfr/out_str.c, Revision 1.1.1.1

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: }