home *** CD-ROM | disk | FTP | other *** search
- /* mpz_inp_raw -- Input a MP_INT in raw, but endianess, and wordsize
- independent format (as output by mpz_out_raw).
-
- Copyright (C) 1991, 1992 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 General Public License as published by
- the Free Software Foundation; either version 2, 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 General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with the GNU MP Library; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #include <stdio.h>
-
- #include "gmp.h"
- #include "gmp-impl.h"
-
- void
- #ifdef __STDC__
- mpz_inp_raw (MP_INT *x, FILE *file)
- #else
- mpz_inp_raw (x, file)
- MP_INT *x;
- FILE *file;
- #endif
- {
- int i;
- mp_size s;
- mp_size xsize;
- mp_ptr xp;
- unsigned int c;
- mp_limb x_digit;
- mp_size x_index;
-
- xsize = 0;
- for (i = 4 - 1; i >= 0; i--)
- {
- c = fgetc (file);
- xsize = (xsize << BITS_PER_CHAR) | c;
- }
-
- /* ??? Sign extend xsize for non-32 bit machines? */
-
- x_index = (ABS (xsize) + BYTES_PER_MP_LIMB - 1) / BYTES_PER_MP_LIMB - 1;
-
- if (x->alloc < x_index)
- _mpz_realloc (x, x_index);
-
- xp = x->d;
- x->size = xsize / BYTES_PER_MP_LIMB;
- x_digit = 0;
- for (s = ABS (xsize) - 1; s >= 0; s--)
- {
- i = s % BYTES_PER_MP_LIMB;
- c = fgetc (file);
- x_digit = (x_digit << BITS_PER_CHAR) | c;
- if (i == 0)
- {
- xp[x_index--] = x_digit;
- x_digit = 0;
- }
- }
- }
-