Annotation of OpenXM_contrib/gmp/mpz/cmp_ui.c, Revision 1.1.1.3
1.1 maekawa 1: /* mpz_cmp_ui.c -- Compare a mpz_t a with an mp_limb_t b. Return positive,
2: zero, or negative based on if a > b, a == b, or a < b.
3:
1.1.1.3 ! ohara 4: Copyright 1991, 1993, 1994, 1995, 1996, 2001, 2002 Free Software Foundation,
! 5: 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_ui (mpz_srcptr u, unsigned long int v_digit)
1.1 maekawa 29: {
1.1.1.3 ! ohara 30: mp_ptr up;
! 31: mp_size_t un;
! 32: mp_limb_t ul;
! 33:
! 34: up = PTR(u);
! 35: un = SIZ(u);
1.1 maekawa 36:
1.1.1.3 ! ohara 37: if (un == 0)
1.1 maekawa 38: return -(v_digit != 0);
39:
1.1.1.3 ! ohara 40: if (un == 1)
1.1 maekawa 41: {
1.1.1.3 ! ohara 42: ul = up[0];
! 43: if (ul > v_digit)
1.1 maekawa 44: return 1;
1.1.1.3 ! ohara 45: if (ul < v_digit)
1.1 maekawa 46: return -1;
47: return 0;
48: }
49:
1.1.1.3 ! ohara 50: #if GMP_NAIL_BITS != 0
! 51: if (v_digit > GMP_NUMB_MAX)
! 52: {
! 53: if (un == 2)
! 54: {
! 55: ul = up[0] + (up[1] << GMP_NUMB_BITS);
! 56:
! 57: if ((up[1] >> GMP_NAIL_BITS) != 0)
! 58: return 1;
! 59:
! 60: if (ul > v_digit)
! 61: return 1;
! 62: if (ul < v_digit)
! 63: return -1;
! 64: return 0;
! 65: }
! 66: }
! 67: #endif
! 68:
! 69: return un > 0 ? 1 : -1;
1.1 maekawa 70: }
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