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

1.1       maekawa     1: /* mpf_out_str (stream, base, n_digits, op) -- Print N_DIGITS digits from
                      2:    the float OP to STREAM in base BASE.  Return the number of characters
                      3:    written, or 0 if an error occurred.
                      4:
                      5: Copyright (C) 1996 Free Software Foundation, Inc.
                      6:
                      7: This file is part of the GNU MP Library.
                      8:
                      9: The GNU MP Library is free software; you can redistribute it and/or modify
                     10: it under the terms of the GNU Library General Public License as published by
                     11: the Free Software Foundation; either version 2 of the License, or (at your
                     12: option) any later version.
                     13:
                     14: The GNU MP Library is distributed in the hope that it will be useful, but
                     15: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
                     16: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
                     17: License for more details.
                     18:
                     19: You should have received a copy of the GNU Library General Public License
                     20: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     21: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     22: MA 02111-1307, USA. */
                     23:
                     24: #include <stdio.h>
                     25: #include "gmp.h"
                     26: #include "gmp-impl.h"
                     27:
                     28: size_t
                     29: #if __STDC__
                     30: mpf_out_str (FILE *stream, int base, size_t n_digits, mpf_srcptr op)
                     31: #else
                     32: mpf_out_str (stream, base, n_digits, op)
                     33:      FILE *stream;
                     34:      int base;
                     35:      size_t n_digits;
                     36:      mpf_srcptr op;
                     37: #endif
                     38: {
                     39:   char *str;
                     40:   mp_exp_t exp;
                     41:   size_t written;
                     42:   TMP_DECL (marker);
                     43:
                     44:   TMP_MARK (marker);
                     45:
                     46:   if (base == 0)
                     47:     base = 10;
                     48:   if (n_digits == 0)
                     49:     n_digits = (((op->_mp_prec - 1) * BITS_PER_MP_LIMB)
                     50:                * __mp_bases[base].chars_per_bit_exactly);
                     51:
                     52:   if (stream == 0)
                     53:     stream = stdout;
                     54:
                     55:   str = (char *) TMP_ALLOC (n_digits + 2); /* extra for minus sign and \0 */
                     56:
                     57:   mpf_get_str (str, &exp, base, n_digits, op);
                     58:   n_digits = strlen (str);
                     59:
                     60:   written = 0;
                     61:
                     62:   /* Write sign */
                     63:   if (str[0] == '-')
                     64:     {
                     65:       str++;
                     66:       fputc ('-', stream);
                     67:       written = 1;
                     68:     }
                     69:
                     70:   fwrite ("0.", 1, 2, stream);
                     71:   written += 2;
                     72:
                     73:   /* Write mantissa */
                     74:   {
                     75:     size_t fwret;
                     76:     fwret = fwrite (str, 1, n_digits, stream);
                     77:     written += fwret;
                     78:   }
                     79:
                     80:   /* Write exponent */
                     81:   {
                     82:     int fpret;
                     83:     fpret = fprintf (stream, (base <= 10 ? "e%ld" : "@%ld"), exp);
                     84:     written += fpret;
                     85:   }
                     86:
                     87:   TMP_FREE (marker);
                     88:   return ferror (stream) ? 0 : written;
                     89: }