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

   1 /* -*-c-*-
   2  *
   3  * Dump a multiprecision integer as C data
   4  *
   5  * (c) 2004 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 /*----- Header files ------------------------------------------------------*/
  29
  30 #include <errno.h>
  31 #include <stdio.h>
  32 #include <string.h>
  33
  34 #include "mp.h"
  35
  36 /*----- Main code ---------------------------------------------------------*/
  37
  38 int main(int argc, char *argv[])
  39 {
  40   mp *x;
  41   int i;
  42   int w, n;
  43
  44   if (argc != 2) {
  45     fprintf(stderr, "%s: missing argument\n", argv[0]);
  46     return (1);
  47   }
  48   if ((x = mp_readstring(0, argv[1], 0, 0)) == 0) {
  49     fprintf(stderr, "%s: bad integer `%s'", argv[0], argv[1]);
  50     return (1);
  51   }
  52   fputs("  ", stdout);
  53   w = (MPW_BITS + 3)/4;
  54   n = 1;
  55   while (2 + 2 * n * (4 + w) < 72) n <<= 1;
  56   i = 0;
  57   for (;;) {
  58     printf("0x%0*x", w, x->v[i]);
  59     i++;
  60     if (i >= MP_LEN(x)) break;
  61     fputs(",", stdout);
  62     if (i % n) fputs(" ", stdout); else fputs("\n  ", stdout);
  63   }
  64   if (fflush(stdout) || ferror(stdout)) {
  65     fprintf(stderr, "%s: error writing data: %s", argv[0], strerror(errno));
  66     return (1);
  67   }
  68   fputs("\n", stdout);
  69   return (0);
  70 }
  71
  72 /*----- That's all, folks -------------------------------------------------*/