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

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: }