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Diff for /OpenXM_contrib/gmp/mpz/Attic/sub_ui.c between version 1.1.1.1 and 1.1.1.3

version 1.1.1.1, 2000/01/10 15:35:27 version 1.1.1.3, 2003/08/25 16:06:34
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 /* mpz_sub_ui -- Subtract an unsigned one-word integer from an MP_INT.  /* mpz_sub_ui -- Subtract an mpz_t and an unsigned one-word integer.
   
 Copyright (C) 1991, 1993, 1994, 1996 Free Software Foundation, Inc.  Copyright 2001 Free Software Foundation, Inc.
   
 This file is part of the GNU MP Library.  This file is part of the GNU MP Library.
   
 The GNU MP Library is free software; you can redistribute it and/or modify  The GNU MP Library is free software; you can redistribute it and/or modify
 it under the terms of the GNU Library General Public License as published by  it under the terms of the GNU Lesser General Public License as published by
 the Free Software Foundation; either version 2 of the License, or (at your  the Free Software Foundation; either version 2.1 of the License, or (at your
 option) any later version.  option) any later version.
   
 The GNU MP Library is distributed in the hope that it will be useful, but  The GNU MP Library is distributed in the hope that it will be useful, but
 WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY  WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Library General Public  or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public
 License for more details.  License for more details.
   
 You should have received a copy of the GNU Library General Public License  You should have received a copy of the GNU Lesser General Public License
 along with the GNU MP Library; see the file COPYING.LIB.  If not, write to  along with the GNU MP Library; see the file COPYING.LIB.  If not, write to
 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,  the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
 MA 02111-1307, USA. */  MA 02111-1307, USA. */
   
 #include "gmp.h"  
 #include "gmp-impl.h"  
   
 void  #define OPERATION_sub_ui
 #if __STDC__  #include "aors_ui.h"
 mpz_sub_ui (mpz_ptr w, mpz_srcptr u, unsigned long int v)  
 #else  
 mpz_sub_ui (w, u, v)  
      mpz_ptr w;  
      mpz_srcptr u;  
      unsigned long int v;  
 #endif  
 {  
   mp_srcptr up;  
   mp_ptr wp;  
   mp_size_t usize, wsize;  
   mp_size_t abs_usize;  
   
   usize = u->_mp_size;  
   abs_usize = ABS (usize);  
   
   /* If not space for W (and possible carry), increase space.  */  
   wsize = abs_usize + 1;  
   if (w->_mp_alloc < wsize)  
     _mpz_realloc (w, wsize);  
   
   /* These must be after realloc (U may be the same as W).  */  
   up = u->_mp_d;  
   wp = w->_mp_d;  
   
   if (abs_usize == 0)  
     {  
       wp[0] = v;  
       w->_mp_size = -(v != 0);  
       return;  
     }  
   
   if (usize < 0)  
     {  
       mp_limb_t cy;  
       cy = mpn_add_1 (wp, up, abs_usize, v);  
       wp[abs_usize] = cy;  
       wsize = -(abs_usize + cy);  
     }  
   else  
     {  
       /* The signs are different.  Need exact comparison to determine  
          which operand to subtract from which.  */  
       if (abs_usize == 1 && up[0] < v)  
         {  
           wp[0] = v - up[0];  
           wsize = -1;  
         }  
       else  
         {  
           mpn_sub_1 (wp, up, abs_usize, v);  
           /* Size can decrease with at most one limb.  */  
           wsize = abs_usize - (wp[abs_usize - 1] == 0);  
         }  
     }  
   
   w->_mp_size = wsize;  
 }  
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Removed from v.1.1.1.1  
changed lines
  Added in v.1.1.1.3
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