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

   1 /* -*-c-*-
   2  *
   3  * $Id: mpdump.c,v 1.1 2004/03/27 17:54:11 mdw Exp $
   4  *
   5  * Dump a multiprecision integer as C data
   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: mpdump.c,v $
  33  * Revision 1.1  2004/03/27 17:54:11  mdw
  34  * Standard curves and curve checking.
  35  *
  36  */
  37
  38 /*----- Header files ------------------------------------------------------*/
  39
  40 #include <errno.h>
  41 #include <stdio.h>
  42 #include <string.h>
  43
  44 #include "mp.h"
  45
  46 /*----- Main code ---------------------------------------------------------*/
  47
  48 int main(int argc, char *argv[])
  49 {
  50   mp *x;
  51   int i;
  52   int w, n;
  53
  54   if (argc != 2) {
  55     fprintf(stderr, "%s: missing argument\n", argv[0]);
  56     return (1);
  57   }
  58   if ((x = mp_readstring(0, argv[1], 0, 0)) == 0) {
  59     fprintf(stderr, "%s: bad integer `%s'", argv[0], argv[1]);
  60     return (1);
  61   }
  62   fputs("  ", stdout);
  63   w = (MPW_BITS + 3)/4;
  64   n = 1;
  65   while (2 + 2 * n * (4 + w) < 72) n <<= 1;
  66   i = 0;
  67   for (;;) {
  68     printf("0x%0*x", w, x->v[i]);
  69     i++;
  70     if (i >= MP_LEN(x)) break;
  71     fputs(",", stdout);
  72     if (i % n) fputs(" ", stdout); else fputs("\n  ", stdout);
  73   }
  74   if (fflush(stdout) || ferror(stdout)) {
  75     fprintf(stderr, "%s: error writing data: %s", argv[0], strerror(errno));
  76     return (1);
  77   }
  78   fputs("\n", stdout);
  79   return (0);
  80 }
  81
  82 /*----- That's all, folks -------------------------------------------------*/