73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
/* mpz_inp_raw -- Input a MP_INT in raw, but endianess, and wordsize
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independent format (as output by mpz_out_raw).
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Copyright (C) 1991, 1992 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 General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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The GNU MP Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with the GNU MP Library; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include "gmp.h"
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#include "gmp-impl.h"
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void
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#ifdef __STDC__
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mpz_inp_raw (MP_INT *x, FILE *file)
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#else
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mpz_inp_raw (x, file)
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MP_INT *x;
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FILE *file;
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#endif
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{
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int i;
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mp_size s;
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mp_size xsize;
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mp_ptr xp;
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unsigned int c;
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mp_limb x_digit;
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mp_size x_index;
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xsize = 0;
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for (i = 4 - 1; i >= 0; i--)
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{
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c = fgetc (file);
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xsize = (xsize << BITS_PER_CHAR) | c;
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}
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/* ??? Sign extend xsize for non-32 bit machines? */
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x_index = (ABS (xsize) + BYTES_PER_MP_LIMB - 1) / BYTES_PER_MP_LIMB - 1;
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if (x->alloc < x_index)
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_mpz_realloc (x, x_index);
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xp = x->d;
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x->size = xsize / BYTES_PER_MP_LIMB;
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x_digit = 0;
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for (s = ABS (xsize) - 1; s >= 0; s--)
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{
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i = s % BYTES_PER_MP_LIMB;
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c = fgetc (file);
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x_digit = (x_digit << BITS_PER_CHAR) | c;
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if (i == 0)
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{
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xp[x_index--] = x_digit;
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x_digit = 0;
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}
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}
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}
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