Annotation of OpenXM_contrib/gmp/mpz/fits_s.h, Revision 1.1.1.1
1.1 ohara 1: /* int mpz_fits_X_p (mpz_t z) -- test whether z fits signed type X.
2:
3: Copyright 1997, 2000, 2001, 2002 Free Software Foundation, Inc.
4:
5: This file is part of the GNU MP Library.
6:
7: The GNU MP Library is free software; you can redistribute it and/or modify
8: it under the terms of the GNU Lesser General Public License as published by
9: the Free Software Foundation; either version 2.1 of the License, or (at your
10: option) any later version.
11:
12: The GNU MP Library is distributed in the hope that it will be useful, but
13: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
15: License for more details.
16:
17: You should have received a copy of the GNU Lesser General Public License
18: along with the GNU MP Library; see the file COPYING.LIB. If not, write to
19: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
20: MA 02111-1307, USA. */
21:
22: #include "gmp.h"
23: #include "gmp-impl.h"
24:
25:
26: int
27: FUNCTION (mpz_srcptr z)
28: {
29: mp_size_t n = SIZ(z);
30: mp_ptr p = PTR(z);
31: mp_limb_t limb = p[0];
32:
33: if (n == 0)
34: return 1;
35: if (n == 1)
36: return limb <= MAXIMUM;
37: if (n == -1)
38: return limb <= - (mp_limb_t) MINIMUM;
39: #if GMP_NAIL_BITS != 0
40: {
41: if ((p[1] >> GMP_NAIL_BITS) == 0)
42: {
43: limb += p[1] << GMP_NUMB_BITS;
44: if (n == 2)
45: return limb <= MAXIMUM;
46: if (n == -2)
47: return limb <= - (mp_limb_t) MINIMUM;
48: }
49: }
50: #endif
51: return 0;
52: }
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