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 /*

  *  basecvt.c

  *

  *  Convert integer values specified on the command line from one input

  *  base to another.  Accepts input and output bases between 2 and 36

  *  inclusive.

  *

  * This Source Code Form is subject to the terms of the Mozilla Public

  * License, v. 2.0. If a copy of the MPL was not distributed with this

  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

 #include <stdio.h>

 #include <stdlib.h>

 #include <string.h>

 #include "mpi.h"

 #define IBASE     10

 #define OBASE     16

 #define USAGE     "Usage: %s ibase obase [value]\n"

 #define MAXBASE   64

 #define MINBASE   2

 int main(int argc, char *argv[])

 {

   int    ix, ibase = IBASE, obase = OBASE;

   mp_int val;

   ix = 1;

   if(ix < argc) {

     ibase = atoi(argv[ix++]);

     if(ibase < MINBASE || ibase > MAXBASE) {

       fprintf(stderr, "%s: input radix must be between %d and %d inclusive\n",

 	      argv[0], MINBASE, MAXBASE);

       return 1;

     }

   }

   if(ix < argc) {

     obase = atoi(argv[ix++]);

     if(obase < MINBASE || obase > MAXBASE) {

       fprintf(stderr, "%s: output radix must be between %d and %d inclusive\n",

 	      argv[0], MINBASE, MAXBASE);

       return 1;

     }

   }

   mp_init(&val);

   while(ix < argc) {

     char  *out;

     int    outlen;

     mp_read_radix(&val, argv[ix++], ibase);

     outlen = mp_radix_size(&val, obase);

     out = calloc(outlen, sizeof(char));

     mp_toradix(&val, out, obase);

     printf("%s\n", out);

     free(out);

   }

   mp_clear(&val);

   return 0;

 }