mirror of
https://github.com/KolibriOS/kolibrios.git
synced 2024-12-23 23:26:49 +03:00
94 lines
2.7 KiB
HTML
94 lines
2.7 KiB
HTML
; 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 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 ecx
|
||
ret
|
||
|
||
|
||
|
||
; linlen function
|
||
;
|
||
; Copyright (c) 2009 Igor Afanasiev
|
||
|
||
linlen:
|
||
push ecx edi
|
||
pushfd
|
||
cld
|
||
mov ecx,eax
|
||
inc ecx
|
||
mov edi,esi ; find terminating zero
|
||
mov al,13
|
||
repne scasb
|
||
mov eax,edi ; calculate string length
|
||
sub eax,esi
|
||
dec eax
|
||
popfd
|
||
pop edi ecx
|
||
ret
|
||
|
||
;description:
|
||
; проверяет содержится ли строка str1 в строке str0
|
||
; проверка делается только начиная с первых символов, указанных в str0 и str1
|
||
; пример 1: если str0='aaabbbccc', str1='bbb' совпадения не будет
|
||
; пример 2: если str0='aaabbbccc', str1='aaa' совпадение будет
|
||
;output:
|
||
; al = 0 если строка str1 содержится в str0
|
||
; al != 0 если строка str1 не содержится в str0
|
||
align 4
|
||
proc str_instr uses edi esi, str0:dword, str1:dword
|
||
;xor eax,eax
|
||
mov edi,[str0]
|
||
mov esi,[str1]
|
||
cld
|
||
@@:
|
||
mov al,[esi]
|
||
cmp al,0
|
||
je .e1
|
||
inc esi
|
||
scasb ;сравниваем символы
|
||
jz @b ;если совпали, то переходим к сравнению следующих
|
||
;сюда попадаем если строки не совпали
|
||
sub al,[edi-1]
|
||
.e1: ;сюда попадаем если строка str1 (esi) закончилась
|
||
ret
|
||
endp
|
||
|