Annotation of OpenXM/src/kan96xx/gmp-2.0.2-ssh-2/mpz/out_raw.c, Revision 1.1.1.1
1.1 takayama 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: }
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>