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

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:
                      4: Copyright (C) 1996 Free Software Foundation, Inc.
                      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
                      9: it under the terms of the GNU Library General Public License as published by
                     10: the Free Software Foundation; either version 2 of the License, or (at your
                     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
                     15: or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public
                     16: License for more details.
                     17:
                     18: You should have received a copy of the GNU Library General Public License
                     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: #if __STDC__
                     30: mpf_inp_str (mpf_ptr rop, FILE *stream, int base)
                     31: #else
                     32: mpf_inp_str (rop, stream, base)
                     33:      mpf_ptr rop;
                     34:      FILE *stream;
                     35:      int base;
                     36: #endif
                     37: {
                     38:   char *str;
                     39:   size_t alloc_size, str_size;
                     40:   int c;
                     41:   size_t retval;
                     42:   size_t nread;
                     43:
                     44:   if (stream == 0)
                     45:     stream = stdin;
                     46:
                     47:   alloc_size = 100;
                     48:   str = (char *) (*_mp_allocate_func) (alloc_size);
                     49:   str_size = 0;
                     50:   nread = 0;
                     51:
                     52:   /* Skip whitespace.  */
                     53:   do
                     54:     {
                     55:       c = getc (stream);
                     56:       nread++;
                     57:     }
                     58:   while (isspace (c));
                     59:
                     60:   for (;;)
                     61:     {
                     62:       if (str_size >= alloc_size)
                     63:        {
                     64:          size_t old_alloc_size = alloc_size;
                     65:          alloc_size = alloc_size * 3 / 2;
                     66:          str = (char *) (*_mp_reallocate_func) (str, old_alloc_size, alloc_size);
                     67:        }
                     68:       if (c == EOF || isspace (c))
                     69:        break;
                     70:       str[str_size++] = c;
                     71:       c = getc (stream);
                     72:     }
                     73:   ungetc (c, stream);
                     74:
                     75:   if (str_size >= alloc_size)
                     76:     {
                     77:       size_t old_alloc_size = alloc_size;
                     78:       alloc_size = alloc_size * 3 / 2;
                     79:       str = (char *) (*_mp_reallocate_func) (str, old_alloc_size, alloc_size);
                     80:     }
                     81:   str[str_size] = 0;
                     82:
                     83:   retval = mpf_set_str (rop, str, base);
                     84:   if (retval == -1)
                     85:     return 0;                  /* error */
                     86:
                     87:   (*_mp_free_func) (str, alloc_size);
                     88:   return str_size + nread;
                     89: }