git.distorted.org.uk Git - u/mdw/catacomb/blob - math/buf.h

   1 /* -*-c-*-
   2  *
   3  * Reading and writing packet buffers
   4  *
   5  * (c) 2001 Straylight/Edgeware
   6  */
   7
   8 /*----- Licensing notice --------------------------------------------------*
   9  *
  10  * This file is part of Catacomb.
  11  *
  12  * Catacomb is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU Library General Public License as
  14  * published by the Free Software Foundation; either version 2 of the
  15  * License, or (at your option) any later version.
  16  *
  17  * Catacomb is distributed in the hope that it will be useful,
  18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  * GNU Library General Public License for more details.
  21  *
  22  * You should have received a copy of the GNU Library General Public
  23  * License along with Catacomb; if not, write to the Free
  24  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
  25  * MA 02111-1307, USA.
  26  */
  27
  28 #ifndef CATACOMB_BUF_H
  29 #define CATACOMB_BUF_H
  30
  31 #ifdef __cplusplus
  32   extern "C" {
  33 #endif
  34
  35 /*----- Header files ------------------------------------------------------*/
  36
  37 #include <mLib/bits.h>
  38 #include <mLib/buf.h>
  39
  40 #ifndef CATACOMB_MP_H
  41 #  include "mp.h"
  42 #endif
  43
  44 #ifndef CATACOMB_EC_H
  45 #  include "ec.h"
  46 #endif
  47
  48 /*----- Functions provided ------------------------------------------------*/
  49
  50 /* --- @buf_getmp@ --- *
  51  *
  52  * Arguments:   @buf *b@ = pointer to a buffer block
  53  *
  54  * Returns:     A multiprecision integer, or null if there wasn't one there.
  55  *
  56  * Use:         Gets a multiprecision integer from a buffer.
  57  */
  58
  59 extern mp *buf_getmp(buf */*b*/);
  60
  61 /* --- @buf_putmp@ --- *
  62  *
  63  * Arguments:   @buf *b@ = pointer to a buffer block
  64  *              @mp *m@ = a multiprecision integer
  65  *
  66  * Returns:     Zero if it worked, nonzero if there wasn't enough space.
  67  *
  68  * Use:         Puts a multiprecision integer to a buffer.
  69  */
  70
  71 extern int buf_putmp(buf */*b*/, mp */*m*/);
  72
  73 /* --- @buf_getec@ --- *
  74  *
  75  * Arguments:   @buf *b@ = pointer to a buffer block
  76  *              @ec *p@ = where to put the point
  77  *
  78  * Returns:     Zero if it worked, nonzero if it failed.
  79  *
  80  * Use:         Gets a multiprecision integer from a buffer.  The point must
  81  *              be initialized.
  82  */
  83
  84 extern int buf_getec(buf */*b*/, ec */*p*/);
  85
  86 /* --- @buf_putec@ --- *
  87  *
  88  * Arguments:   @buf *b@ = pointer to a buffer block
  89  *              @ec *p@ = an elliptic curve point
  90  *
  91  * Returns:     Zero if it worked, nonzero if there wasn't enough space.
  92  *
  93  * Use:         Puts an elliptic curve point to a buffer.
  94  */
  95
  96 extern int buf_putec(buf */*b*/, ec */*p*/);
  97
  98 /*----- That's all, folks -------------------------------------------------*/
  99
 100 #ifdef __cplusplus
 101   }
 102 #endif
 103
 104 #endif