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/* mpf_inp_str(dest_float, stream, base) -- Input a number in base
BASE from stdio stream STREAM and store the result in DEST_FLOAT.
Copyright 1996, 2000, 2001, 2002, 2005 Free Software Foundation, Inc.
This file is part of the GNU MP Library.
The GNU MP Library is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 3 of the License, or (at your
option) any later version.
The GNU MP Library is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
License for more details.
You should have received a copy of the GNU Lesser General Public License
along with the GNU MP Library. If not, see http://www.gnu.org/licenses/. */
#include <stdio.h>
#include <ctype.h>
#include "gmp.h"
#include "gmp-impl.h"
size_t
mpf_inp_str (mpf_ptr rop, FILE *stream, int base)
{
char *str;
size_t alloc_size, str_size;
int c;
int res;
size_t nread;
if (stream == 0)
stream = stdin;
alloc_size = 100;
str = (char *) (*__gmp_allocate_func) (alloc_size);
str_size = 0;
nread = 0;
/* Skip whitespace. */
do
{
c = getc (stream);
nread++;
}
while (isspace (c));
for (;;)
{
if (str_size >= alloc_size)
{
size_t old_alloc_size = alloc_size;
alloc_size = alloc_size * 3 / 2;
str = (char *) (*__gmp_reallocate_func) (str, old_alloc_size, alloc_size);
}
if (c == EOF || isspace (c))
break;
str[str_size++] = c;
c = getc (stream);
}
ungetc (c, stream);
nread--;
if (str_size >= alloc_size)
{
size_t old_alloc_size = alloc_size;
alloc_size = alloc_size * 3 / 2;
str = (char *) (*__gmp_reallocate_func) (str, old_alloc_size, alloc_size);
}
str[str_size] = 0;
res = mpf_set_str (rop, str, base);
(*__gmp_free_func) (str, alloc_size);
if (res == -1)
return 0; /* error */
return str_size + nread;
}
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