git.distorted.org.uk Git - u/mdw/catacomb/blob - field.c

   1 /* -*-c-*-
   2  *
   3  * $Id: field.c,v 1.1.4.1 2003/06/10 13:43:53 mdw Exp $
   4  *
   5  * Abstract field operations
   6  *
   7  * (c) 2001 Straylight/Edgeware
   8  */
   9
  10 /*----- Licensing notice --------------------------------------------------*
  11  *
  12  * This file is part of Catacomb.
  13  *
  14  * Catacomb is free software; you can redistribute it and/or modify
  15  * it under the terms of the GNU Library General Public License as
  16  * published by the Free Software Foundation; either version 2 of the
  17  * License, or (at your option) any later version.
  18  *
  19  * Catacomb is distributed in the hope that it will be useful,
  20  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  * GNU Library General Public License for more details.
  23  *
  24  * You should have received a copy of the GNU Library General Public
  25  * License along with Catacomb; if not, write to the Free
  26  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  27  * MA 02111-1307, USA.
  28  */
  29
  30 /*----- Revision history --------------------------------------------------*
  31  *
  32  * $Log: field.c,v $
  33  * Revision 1.1.4.1  2003/06/10 13:43:53  mdw
  34  * Simple (non-projective) curves over prime fields now seem to work.
  35  *
  36  * Revision 1.1  2001/05/07 17:30:13  mdw
  37  * Add an internal-representation no-op function.
  38  *
  39  */
  40
  41 /*----- Header files ------------------------------------------------------*/
  42
  43 #include "field.h"
  44 #include "mp.h"
  45
  46 /*----- Main code ---------------------------------------------------------*/
  47
  48 /* --- @field_id@ --- *
  49  *
  50  * Arguments:   @field *f@ = pointer to a field
  51  *              @mp *d@ = a destination element
  52  *              @mp *x@ = a source element
  53  *
  54  * Returns:     The result element.
  55  *
  56  * Use:         An identity operation which can be used if your field has no
  57  *              internal representation.
  58  */
  59
  60 mp *field_id(field *f, mp *d, mp *x)
  61 {
  62   x = MP_COPY(x);
  63   if (d) MP_DROP(d);
  64   return (x);
  65 }
  66
  67 /*----- That's all, folks -------------------------------------------------*/