forked from KolibriOS/kolibrios
28 lines
763 B
ArmAsm
28 lines
763 B
ArmAsm
|
# _strncpy() Author: Kees J. Bot
|
||
|
|
# 1 Jan 1994
|
||
|
|
|
||
|
|
# char *_strncpy(char *s1, const char *s2, size_t ecx)
|
||
|
|
# Copy string s2 to s1.
|
||
|
|
#
|
||
|
|
|
||
|
|
.intel_syntax
|
||
|
|
|
||
|
|
.text
|
||
|
|
.globl __strncpy
|
||
|
|
.align 16
|
||
|
|
|
||
|
|
__strncpy:
|
||
|
|
mov edi, [ebp+12] # edi = string s2
|
||
|
|
xorb al, al # Look for a zero byte
|
||
|
|
mov edx, ecx # Save maximum count
|
||
|
|
cld
|
||
|
|
repne
|
||
|
|
scasb # Look for end of s2
|
||
|
|
sub edx, ecx # Number of bytes in s2 including null
|
||
|
|
xchg ecx, edx
|
||
|
|
mov esi, [ebp+12] # esi = string s2
|
||
|
|
mov edi, [ebp+8] # edi = string s1
|
||
|
|
rep
|
||
|
|
movsb # Copy bytes
|
||
|
|
ret
|