blob: b5420ac80312661e68f7e3aba4db688808319af1 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
|
; **************************************************************************** ;
; ;
; ::: :::::::: ;
; ft_strdup.s :+: :+: :+: ;
; +:+ +:+ +:+ ;
; By: cacharle <marvin@42.fr> +;+ +:+ +;+ ;
; +;+;+;+;+;+ +;+ ;
; Created: 2019/11/22 03:04:32 by cacharle ;+; ;+; ;
; Updated: 2019/11/23 00:19:26 by cacharle ;;; ;;;;;;;;.fr ;
; ;
; **************************************************************************** ;
extern ft_strlen
extern ft_strcpy
extern malloc
global ft_strdup
; char *ft_strdup(const char *str);
ft_strdup:
push rdi ; save rdi because it will be overwrite for malloc
call ft_strlen ; rdi is still == str
inc rax ; len++ for '\0'
mov rdi, rax ; size to malloc
call malloc
cmp rax, 0
je FT_STRDUP_ERROR
pop rsi ; original str as src
mov rdi, rax ; allocated as dest
call ft_strcpy
ret
FT_STRDUP_ERROR:
pop rdi
ret
|
