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Annotation of OpenXM_contrib/gmp/mpf/out_str.c, Revision 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: }