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

1.1     ! ohara       1: /* mpf_inp_str(dest_float, stream, base) -- Input a number in base
        !             2:    BASE from stdio stream STREAM and store the result in DEST_FLOAT.
        !             3:
        !             4: Copyright 1999, 2001 Free Software Foundation, Inc.
        !             5: (Copied from GMP, file mpf/inp_str.c)
        !             6:
        !             7: This file is part of the MPFR Library.
        !             8:
        !             9: The MPFR Library is free software; you can redistribute it and/or modify
        !            10: it under the terms of the GNU Lesser General Public License as published by
        !            11: the Free Software Foundation; either version 2.1 of the License, or (at your
        !            12: option) any later version.
        !            13:
        !            14: The MPFR 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 Lesser General Public
        !            17: License for more details.
        !            18:
        !            19: You should have received a copy of the GNU Lesser General Public License
        !            20: along with the MPFR 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 <ctype.h>
        !            26: #include "gmp.h"
        !            27: #include "gmp-impl.h"
        !            28: #include "mpfr.h"
        !            29: #include "mpfr-impl.h"
        !            30:
        !            31: size_t
        !            32: mpfr_inp_str (mpfr_ptr rop, FILE *stream, int base, mp_rnd_t rnd_mode)
        !            33: {
        !            34:   char *str;
        !            35:   size_t alloc_size, str_size;
        !            36:   int c;
        !            37:   size_t retval;
        !            38:   size_t nread;
        !            39:
        !            40:   MPFR_CLEAR_FLAGS(rop);
        !            41:   if (stream == 0)
        !            42:     stream = stdin;
        !            43:
        !            44:   alloc_size = 100;
        !            45:   str = (char *) (*__gmp_allocate_func) (alloc_size);
        !            46:   str_size = 0;
        !            47:   nread = 0;
        !            48:
        !            49:   /* Skip whitespace.  */
        !            50:   do
        !            51:     {
        !            52:       c = getc (stream);
        !            53:       nread++;
        !            54:     }
        !            55:   while (isspace (c));
        !            56:
        !            57:   for (;;)
        !            58:     {
        !            59:       if (str_size >= alloc_size)
        !            60:        {
        !            61:          size_t old_alloc_size = alloc_size;
        !            62:          alloc_size = alloc_size * 3 / 2;
        !            63:          str = (char *) (*__gmp_reallocate_func) (str, old_alloc_size, alloc_size);
        !            64:        }
        !            65:       if (c == EOF || isspace (c))
        !            66:        break;
        !            67:       str[str_size++] = c;
        !            68:       c = getc (stream);
        !            69:     }
        !            70:   ungetc (c, stream);
        !            71:
        !            72:   if (str_size >= alloc_size)
        !            73:     {
        !            74:       size_t old_alloc_size = alloc_size;
        !            75:       alloc_size = alloc_size * 3 / 2;
        !            76:       str = (char *) (*__gmp_reallocate_func) (str, old_alloc_size, alloc_size);
        !            77:     }
        !            78:   str[str_size] = 0;
        !            79:
        !            80:   retval = mpfr_set_str (rop, str, base, rnd_mode);
        !            81:   (*__gmp_free_func) (str, alloc_size);
        !            82:
        !            83:   if (retval == -1)
        !            84:     return 0;                  /* error */
        !            85:
        !            86:   return str_size + nread;
        !            87: }