Annotation of OpenXM_contrib/gmp/mpz/cmp_si.c, Revision 1.1.1.3
1.1 maekawa 1: /* mpz_cmp_si(u,v) -- Compare an integer U with a single-word int V.
2: Return positive, zero, or negative based on if U > V, U == V, or U < V.
3:
1.1.1.3 ! ohara 4: Copyright 1991, 1993, 1994, 1995, 1996, 2000, 2001, 2002 Free Software
! 5: Foundation, Inc.
1.1 maekawa 6:
7: This file is part of the GNU MP Library.
8:
9: The GNU MP Library is free software; you can redistribute it and/or modify
1.1.1.2 maekawa 10: it under the terms of the GNU Lesser General Public License as published by
11: the Free Software Foundation; either version 2.1 of the License, or (at your
1.1 maekawa 12: option) any later version.
13:
14: The GNU MP Library is distributed in the hope that it will be useful, but
15: WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
1.1.1.2 maekawa 16: or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
1.1 maekawa 17: License for more details.
18:
1.1.1.2 maekawa 19: You should have received a copy of the GNU Lesser General Public License
1.1 maekawa 20: along with the GNU MP Library; see the file COPYING.LIB. If not, write to
21: the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22: MA 02111-1307, USA. */
23:
24: #include "gmp.h"
25: #include "gmp-impl.h"
26:
27: int
1.1.1.2 maekawa 28: _mpz_cmp_si (mpz_srcptr u, signed long int v_digit)
1.1 maekawa 29: {
30: mp_size_t usize = u->_mp_size;
31: mp_size_t vsize;
32: mp_limb_t u_digit;
1.1.1.3 ! ohara 33:
! 34: #if GMP_NAIL_BITS != 0
! 35: /* FIXME. This isn't very pretty. */
! 36: mpz_t tmp;
! 37: mp_limb_t tt[2];
! 38: PTR(tmp) = tt;
! 39: ALLOC(tmp) = 2;
! 40: mpz_set_si (tmp, v_digit);
! 41: return mpz_cmp (u, tmp);
! 42: #endif
1.1 maekawa 43:
44: vsize = 0;
45: if (v_digit > 0)
46: vsize = 1;
47: else if (v_digit < 0)
48: {
49: vsize = -1;
50: v_digit = -v_digit;
51: }
52:
53: if (usize != vsize)
54: return usize - vsize;
55:
56: if (usize == 0)
57: return 0;
58:
59: u_digit = u->_mp_d[0];
60:
1.1.1.2 maekawa 61: if (u_digit == (mp_limb_t) (unsigned long) v_digit)
1.1 maekawa 62: return 0;
63:
1.1.1.2 maekawa 64: if (u_digit > (mp_limb_t) (unsigned long) v_digit)
1.1 maekawa 65: return usize;
66: else
67: return -usize;
68: }
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