; strlen function ; ; Copyright (c) 2003 Thomas Mathys ; killer@vantage.ch ; ; This program is free software; you can redistribute it and/or modify ; it under the terms of the GNU General Public License as published by ; the Free Software Foundation; either version 2 of the License, or ; (at your option) any later version. ; ; This program 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 General Public License for more details. ; ; You should have received a copy of the GNU General Public License ; along with this program; if not, write to the Free Software ; Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA ; ;%ifndef _STRLEN_INC ;%define _STRLEN_INC ;******************************************************************** ; returns the length of an asciiz string ; input : esi = pointer to string ; output : eax = string length ; destroys : nothing ;******************************************************************** strlen: push ecx push edi pushfd cld ; ! mov ecx,-1 mov edi,esi ; find terminating zero xor al,al repne scasb mov eax,edi ; calculate string length sub eax,esi dec eax popfd pop edi pop ecx ret