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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: }