/*
 * c_pzasusb8 - print numerator as a string of USB8s
 *
 * Copyright (C) 1999-2004,2021-2023  Ernest Bowen
 *
 * Calc is open software; you can redistribute it and/or modify it under
 * the terms of the version 2.1 of the GNU Lesser General Public License
 * as published by the Free Software Foundation.
 *
 * Calc is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General
 * Public License for more details.
 *
 * A copy of version 2.1 of the GNU Lesser General Public License is
 * distributed with calc under the filename COPYING-LGPL.  You should have
 * received a copy with calc; if not, write to Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 *
 * Under source code control:   1999/10/06 03:12:25
 * File existed as early as:    1999
 *
 * Share and enjoy!  :-)        http://www.isthe.com/chongo/tech/comp/calc/
 */


/*
 * ISO C requires a translation unit to contain at least one declaration,
 * so we declare a global variable whose value is based on if CUSTOM is defined.
 */
#if defined(CUSTOM)
int c_pzasusb8_allowed = 1;     /* CUSTOM defined */
#else /* CUSTOM */
int c_pzasusb8_allowed = 0;     /* CUSTOM undefined */
#endif /* CUSTOM */


#if defined(CUSTOM)

#include <stdio.h>

#include "../have_const.h"
#include "../value.h"
#include "../custom.h"
#include "../zmath.h"

#include "../have_unused.h"


#include "../errtbl.h"
#include "../banned.h"  /* include after system header <> includes */


/*
 * c_pzasusb8 - print numerator as a string of USB8s
 *
 * given:
 *    count = 1;
 *    vals[0]   real number;
 *
 * returns:
 *    null
 */
/*ARGSUSED*/
VALUE
c_pzasusb8(char *UNUSED(name), int UNUSED(count), VALUE **vals)
{
        VALUE result;           /* what we will return */
        ZVALUE z;               /* numerator of the value */
        long half_cnt;          /* number of HALFs in the numerator */
        USB8 *h;                /* octet pointer */
        long half_len;          /* length of a half in octets */
        long i;
        long j;

        /*
         * arg check
         */
        result.v_type = V_NULL;
        if (vals[0]->v_type != V_NUM) {
                math_error("Non-real argument for pzasusb8");
                not_reached();
        }

        /*
         * look at the numerator
         */
        z = vals[0]->v_num->num;
        half_len = sizeof(HALF);
        half_cnt = z.len;

        /*
         * print the octets
         */
        h = (USB8 *) z.v;
        for (i=0; i < half_cnt; ++i) {
                printf("%ld:\t", i);
                for (j=0; j < half_len; ++j) {
                        printf("%02x", (int)(*h++));
                }
                putchar('\n');
        }
        return result;
}

#endif /* CUSTOM */
