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Annotation of OpenXM_contrib/gmp/mpf/inp_str.c, Revision 1.1.1.3

1.1       maekawa     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:
1.1.1.3 ! ohara       4: Copyright 1996, 2000, 2001, 2002 Free Software Foundation, Inc.
1.1       maekawa     5:
                      6: This file is part of the GNU MP Library.
                      7:
                      8: The GNU MP Library is free software; you can redistribute it and/or modify
1.1.1.2   maekawa     9: it under the terms of the GNU Lesser General Public License as published by
                     10: the Free Software Foundation; either version 2.1 of the License, or (at your
1.1       maekawa    11: option) any later version.
                     12:
                     13: The GNU MP Library is distributed in the hope that it will be useful, but
                     14: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
1.1.1.2   maekawa    15: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
1.1       maekawa    16: License for more details.
                     17:
1.1.1.2   maekawa    18: You should have received a copy of the GNU Lesser General Public License
1.1       maekawa    19: along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
                     20: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
                     21: MA 02111-1307, USA. */
                     22:
                     23: #include <stdio.h>
                     24: #include <ctype.h>
                     25: #include "gmp.h"
                     26: #include "gmp-impl.h"
                     27:
                     28: size_t
                     29: mpf_inp_str (mpf_ptr rop, FILE *stream, int base)
                     30: {
                     31:   char *str;
                     32:   size_t alloc_size, str_size;
                     33:   int c;
                     34:   size_t retval;
                     35:   size_t nread;
                     36:
                     37:   if (stream == 0)
                     38:     stream = stdin;
                     39:
                     40:   alloc_size = 100;
1.1.1.3 ! ohara      41:   str = (char *) (*__gmp_allocate_func) (alloc_size);
1.1       maekawa    42:   str_size = 0;
                     43:   nread = 0;
                     44:
                     45:   /* Skip whitespace.  */
                     46:   do
                     47:     {
                     48:       c = getc (stream);
                     49:       nread++;
                     50:     }
                     51:   while (isspace (c));
                     52:
                     53:   for (;;)
                     54:     {
                     55:       if (str_size >= alloc_size)
                     56:        {
                     57:          size_t old_alloc_size = alloc_size;
                     58:          alloc_size = alloc_size * 3 / 2;
1.1.1.3 ! ohara      59:          str = (char *) (*__gmp_reallocate_func) (str, old_alloc_size, alloc_size);
1.1       maekawa    60:        }
                     61:       if (c == EOF || isspace (c))
                     62:        break;
                     63:       str[str_size++] = c;
                     64:       c = getc (stream);
                     65:     }
                     66:   ungetc (c, stream);
1.1.1.3 ! ohara      67:   nread--;
1.1       maekawa    68:
                     69:   if (str_size >= alloc_size)
                     70:     {
                     71:       size_t old_alloc_size = alloc_size;
                     72:       alloc_size = alloc_size * 3 / 2;
1.1.1.3 ! ohara      73:       str = (char *) (*__gmp_reallocate_func) (str, old_alloc_size, alloc_size);
1.1       maekawa    74:     }
                     75:   str[str_size] = 0;
                     76:
                     77:   retval = mpf_set_str (rop, str, base);
1.1.1.3 ! ohara      78:   (*__gmp_free_func) (str, alloc_size);
        !            79:
1.1       maekawa    80:   if (retval == -1)
                     81:     return 0;                  /* error */
                     82:
                     83:   return str_size + nread;
                     84: }