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

   1 /* -*-c-*-
   2  *
   3  * $Id: group-file.c,v 1.2 2004/04/04 19:04:11 mdw Exp $
   4  *
   5  * File I/O for group elements
   6  *
   7  * (c) 2004 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: group-file.c,v $
  33  * Revision 1.2  2004/04/04 19:04:11  mdw
  34  * Raw I/O of elliptic curve points and group elements.
  35  *
  36  * Revision 1.1  2004/04/01 12:50:09  mdw
  37  * Add cyclic group abstraction, with test code.  Separate off exponentation
  38  * functions for better static linking.  Fix a buttload of bugs on the way.
  39  * Generally ensure that negative exponents do inversion correctly.  Add
  40  * table of standard prime-field subgroups.  (Binary field subgroups are
  41  * currently unimplemented but easy to add if anyone ever finds a good one.)
  42  *
  43  */
  44
  45 /*----- Header files ------------------------------------------------------*/
  46
  47 #include "group.h"
  48
  49 /*----- Main code ---------------------------------------------------------*/
  50
  51 /* --- @group_readfile@ --- *
  52  *
  53  * Arguments:   @group *g@ = an abstract group
  54  *              @ge *d@ = destination group element
  55  *              @FILE *fp@ = the file to read from
  56  *
  57  * Returns:     Zero on success, nonzero on failure.
  58  *
  59  * Use:         Parses a group element from a file.
  60  */
  61
  62 int group_readfile(group *g, ge *d, FILE *fp)
  63   { return (G_READ(g, d, &mptext_fileops, fp)); }
  64
  65 /* --- @group_writefile@ --- *
  66  *
  67  * Arguments:   @group *g@ = an abstract group
  68  *              @ge *x@ = a group element
  69  *              @FILE *fp@ = the file to write on
  70  *
  71  * Returns:     Zero on success, nonzero on failure.
  72  *
  73  * Use:         Writes a group element to a file.
  74  */
  75
  76 int group_writefile(group *g, ge *x, FILE *fp)
  77   { return (G_WRITE(g, x, &mptext_fileops, fp)); }
  78
  79 /*----- That's all, folks -------------------------------------------------*/