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Annotation of OpenXM/src/kan96xx/gmp-2.0.2/mpz/cmp_si.c, Revision 1.1.1.1

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: }