Annotation of OpenXM/src/kan96xx/gmp-2.0.2/mpz/out_raw.c, Revision 1.1
1.1 ! maekawa 1: /* mpz_out_raw -- Output a mpz_t in binary. Use an endianess and word size
! 2: independent format.
! 3:
! 4: Copyright (C) 1995 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:
! 25: #include "gmp.h"
! 26: #include "gmp-impl.h"
! 27:
! 28: size_t
! 29: #if __STDC__
! 30: mpz_out_raw (FILE *stream, mpz_srcptr x)
! 31: #else
! 32: mpz_out_raw (stream, x)
! 33: FILE *stream;
! 34: mpz_srcptr x;
! 35: #endif
! 36: {
! 37: int i;
! 38: mp_size_t s;
! 39: mp_size_t xsize = ABS (x->_mp_size);
! 40: mp_srcptr xp = x->_mp_d;
! 41: mp_size_t out_bytesize;
! 42: mp_limb_t hi_limb;
! 43: int n_bytes_in_hi_limb;
! 44:
! 45: if (stream == 0)
! 46: stream = stdout;
! 47:
! 48: if (xsize == 0)
! 49: {
! 50: for (i = 4 - 1; i >= 0; i--)
! 51: fputc (0, stream);
! 52: return ferror (stream) ? 0 : 4;
! 53: }
! 54:
! 55: hi_limb = xp[xsize - 1];
! 56: for (i = BYTES_PER_MP_LIMB - 1; i > 0; i--)
! 57: {
! 58: if ((hi_limb >> i * BITS_PER_CHAR) != 0)
! 59: break;
! 60: }
! 61: n_bytes_in_hi_limb = i + 1;
! 62: out_bytesize = BYTES_PER_MP_LIMB * (xsize - 1) + n_bytes_in_hi_limb;
! 63: if (x->_mp_size < 0)
! 64: out_bytesize = -out_bytesize;
! 65:
! 66: /* Make the size 4 bytes on all machines, to make the format portable. */
! 67: for (i = 4 - 1; i >= 0; i--)
! 68: fputc ((out_bytesize >> (i * BITS_PER_CHAR)) % (1 << BITS_PER_CHAR),
! 69: stream);
! 70:
! 71: /* Output from the most significant limb to the least significant limb,
! 72: with each limb also output in decreasing significance order. */
! 73:
! 74: /* Output the most significant limb separately, since we will only
! 75: output some of its bytes. */
! 76: for (i = n_bytes_in_hi_limb - 1; i >= 0; i--)
! 77: fputc ((hi_limb >> (i * BITS_PER_CHAR)) % (1 << BITS_PER_CHAR), stream);
! 78:
! 79: /* Output the remaining limbs. */
! 80: for (s = xsize - 2; s >= 0; s--)
! 81: {
! 82: mp_limb_t x_limb;
! 83:
! 84: x_limb = xp[s];
! 85: for (i = BYTES_PER_MP_LIMB - 1; i >= 0; i--)
! 86: fputc ((x_limb >> (i * BITS_PER_CHAR)) % (1 << BITS_PER_CHAR), stream);
! 87: }
! 88: return ferror (stream) ? 0 : ABS (out_bytesize) + 4;
! 89: }
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