michael@0: /*
michael@0:  *  basecvt.c
michael@0:  *
michael@0:  *  Convert integer values specified on the command line from one input
michael@0:  *  base to another.  Accepts input and output bases between 2 and 36
michael@0:  *  inclusive.
michael@0:  *
michael@0:  * This Source Code Form is subject to the terms of the Mozilla Public
michael@0:  * License, v. 2.0. If a copy of the MPL was not distributed with this
michael@0:  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
michael@0: 
michael@0: #include <stdio.h>
michael@0: #include <stdlib.h>
michael@0: #include <string.h>
michael@0: 
michael@0: #include "mpi.h"
michael@0: 
michael@0: #define IBASE     10
michael@0: #define OBASE     16
michael@0: #define USAGE     "Usage: %s ibase obase [value]\n"
michael@0: #define MAXBASE   64
michael@0: #define MINBASE   2
michael@0: 
michael@0: int main(int argc, char *argv[])
michael@0: {
michael@0:   int    ix, ibase = IBASE, obase = OBASE;
michael@0:   mp_int val;
michael@0: 
michael@0:   ix = 1;
michael@0:   if(ix < argc) {
michael@0:     ibase = atoi(argv[ix++]);
michael@0:     
michael@0:     if(ibase < MINBASE || ibase > MAXBASE) {
michael@0:       fprintf(stderr, "%s: input radix must be between %d and %d inclusive\n",
michael@0: 	      argv[0], MINBASE, MAXBASE);
michael@0:       return 1;
michael@0:     }
michael@0:   }
michael@0:   if(ix < argc) {
michael@0:     obase = atoi(argv[ix++]);
michael@0: 
michael@0:     if(obase < MINBASE || obase > MAXBASE) {
michael@0:       fprintf(stderr, "%s: output radix must be between %d and %d inclusive\n",
michael@0: 	      argv[0], MINBASE, MAXBASE);
michael@0:       return 1;
michael@0:     }
michael@0:   }
michael@0: 
michael@0:   mp_init(&val);
michael@0:   while(ix < argc) {
michael@0:     char  *out;
michael@0:     int    outlen;
michael@0: 
michael@0:     mp_read_radix(&val, argv[ix++], ibase);
michael@0: 
michael@0:     outlen = mp_radix_size(&val, obase);
michael@0:     out = calloc(outlen, sizeof(char));
michael@0:     mp_toradix(&val, out, obase);
michael@0: 
michael@0:     printf("%s\n", out);
michael@0:     free(out);
michael@0:   }
michael@0: 
michael@0:   mp_clear(&val);
michael@0: 
michael@0:   return 0;
michael@0: }