92 lines
2.4 KiB
C
92 lines
2.4 KiB
C
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/* min(MINT) -- Do decimal input from standard input and store result in
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MINT.
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Copyright 1991, 1994, 1996, 2000, 2001 Free Software Foundation, Inc.
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This file is part of the GNU MP Library.
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The GNU MP Library is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or (at your
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option) any later version.
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The GNU MP Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the GNU MP Library; see the file COPYING.LIB. If not, write to
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the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#include <stdio.h>
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#include <ctype.h>
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#include "mp.h"
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#include "gmp.h"
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#include "gmp-impl.h"
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extern const unsigned char __gmp_digit_value_tab[];
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#define digit_value_tab __gmp_digit_value_tab
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void
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min (MINT *dest)
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{
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char *str;
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size_t alloc_size, str_size;
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int c;
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int negative;
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mp_size_t dest_size;
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const unsigned char *digit_value;
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digit_value = digit_value_tab;
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alloc_size = 100;
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str = (char *) (*__gmp_allocate_func) (alloc_size);
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str_size = 0;
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/* Skip whitespace. */
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do
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c = getc (stdin);
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while (isspace (c));
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negative = 0;
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if (c == '-')
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{
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negative = 1;
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c = getc (stdin);
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}
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if (c == EOF || digit_value[c] >= 10)
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return; /* error if no digits */
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do
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{
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int dig;
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dig = digit_value[c];
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if (dig >= 10)
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break;
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if (str_size >= alloc_size)
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{
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size_t old_alloc_size = alloc_size;
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alloc_size = alloc_size * 3 / 2;
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str = (char *) (*__gmp_reallocate_func) (str, old_alloc_size, alloc_size);
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}
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str[str_size++] = dig;
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c = getc (stdin);
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}
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while (c != EOF);
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ungetc (c, stdin);
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dest_size = str_size / __mp_bases[10].chars_per_limb + 1;
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if (dest->_mp_alloc < dest_size)
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_mp_realloc (dest, dest_size);
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dest_size = mpn_set_str (dest->_mp_d, (unsigned char *) str, str_size, 10);
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dest->_mp_size = negative ? -dest_size : dest_size;
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(*__gmp_free_func) (str, alloc_size);
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return;
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}
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