/*      $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  [email protected]
*  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();
}