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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: }