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Annotation of OpenXM_contrib/gmp/mpz/cmp_si.c, Revision 1.1

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:
        !             4: Copyright (C) 1991, 1993, 1994, 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 "gmp.h"
        !            24: #include "gmp-impl.h"
        !            25:
        !            26: /* gmp.h defines a macro for mpz_cmp_si.  */
        !            27: #undef mpz_cmp_si
        !            28:
        !            29: int
        !            30: #if __STDC__
        !            31: mpz_cmp_si (mpz_srcptr u, signed long int v_digit)
        !            32: #else
        !            33: mpz_cmp_si (u, v_digit)
        !            34:      mpz_srcptr u;
        !            35:      signed long int v_digit;
        !            36: #endif
        !            37: {
        !            38:   mp_size_t usize = u->_mp_size;
        !            39:   mp_size_t vsize;
        !            40:   mp_limb_t u_digit;
        !            41:
        !            42:   vsize = 0;
        !            43:   if (v_digit > 0)
        !            44:     vsize = 1;
        !            45:   else if (v_digit < 0)
        !            46:     {
        !            47:       vsize = -1;
        !            48:       v_digit = -v_digit;
        !            49:     }
        !            50:
        !            51:   if (usize != vsize)
        !            52:     return usize - vsize;
        !            53:
        !            54:   if (usize == 0)
        !            55:     return 0;
        !            56:
        !            57:   u_digit = u->_mp_d[0];
        !            58:
        !            59:   if (u_digit == v_digit)
        !            60:     return 0;
        !            61:
        !            62:   if (u_digit > v_digit)
        !            63:     return usize;
        !            64:   else
        !            65:     return -usize;
        !            66: }