/*      $NetBSD: db_write_cmd.c,v 1.28 2019/02/03 03:19:26 mrg Exp $    */

/*
 * Mach Operating System
 * Copyright (c) 1991,1990 Carnegie Mellon University
 * All Rights Reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation is hereby granted, provided that both the copyright
 * notice and this permission notice appear in all copies of the
 * software, derivative works or modified versions, and any portions
 * thereof, and that both notices appear in supporting documentation.
 *
 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
 * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
 * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
 *
 * Carnegie Mellon requests users of this software to return to
 *
 *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
 *  School of Computer Science
 *  Carnegie Mellon University
 *  Pittsburgh PA 15213-3890
 *
 * any improvements or extensions that they make and grant Carnegie the
 * rights to redistribute these changes.
 *
 *      Author: David B. Golub,  Carnegie Mellon University
 *      Date:   7/90
 */

#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: db_write_cmd.c,v 1.28 2019/02/03 03:19:26 mrg Exp $");

#include <sys/param.h>
#include <sys/proc.h>

#include <ddb/ddb.h>

/*
 * Write to file.
 */
/*ARGSUSED*/
void
db_write_cmd(db_expr_t address, bool have_addr,
    db_expr_t count, const char *modif)
{
        db_addr_t       addr;
        db_expr_t       old_value;
        db_expr_t       new_value;
        int             size;
        bool            wrote_one;
        bool            show_old_val;

        addr = (db_addr_t) address;
        wrote_one = false;
        show_old_val = islower((unsigned char)modif[0]);

        switch (tolower((unsigned char)modif[0])) {
        case 'b':
                size = 1;
                break;
        case 'h':
                size = 2;
                break;
        case 'l':
        case '\0':
                size = 4;
                break;
        case 'q':
                if (sizeof(db_expr_t) != sizeof(uint64_t)) {
                        size = -1;
                        db_error("q not supported\n");
                        /*NOTREACHED*/
                }
                /* FALLTHROUGH */
        case 'L':
                size = sizeof(db_expr_t);
                break;
        default:
                size = -1;
                db_error("Unknown size\n");
                /*NOTREACHED*/
        }

        while (db_expression(&new_value)) {
                db_printsym(addr, DB_STGY_ANY, db_printf);
                if (show_old_val) {
                        old_value = db_get_value(addr, size, false);
                        db_printf("\t\t%s = ", db_num_to_str(old_value));
                        db_printf("%s\n", db_num_to_str(new_value));
                }
                else
                        db_printf("\t\t= %s\n", db_num_to_str(new_value));
                db_put_value(addr, size, new_value);
                addr += size;

                wrote_one = true;
        }

        if (!wrote_one) {
                db_error("Nothing written.\n");
                /*NOTREACHED*/
        }

        db_next = addr;
        db_prev = addr - size;

        db_skip_to_eol();
}