hi guys :)
so we have this :
MOVZX ECX,WORD PTR DS:[EBX]
MOV WORD PTR DS:[EDX],CX
this get's two bytes (word) from ebx and put them in edx well i wan't to put this in a loop and then add an x char after every word an exemple if we have this 1234567890 it should gives us 12x34x56x78x90 as a result.
i've tried this but didn't succed it gives :
MOV ECX,EAX
LEA EBX,buff1
XOR EDX,EDX
LEA EDX,buff2
XOR ECX,ECX
@@:
MOVZX ECX,WORD PTR DS:[EBX]
TEST ECX,ECX
JE @END
MOV WORD PTR DS:[EDX],CX
INC EBX
JNZ @B
so if anyone here can help it would be appreciated :bg
LEA EBX,buff1
LEA EDX,buff2
JMP foo_20
foo_10:
MOV BYTE PTR [EDX],'x'
INC EDX ; ADVANCE DST BYTE
foo_20:
MOVZX ECX,WORD PTR [EBX] ; TWO ZERO BYTES
ADD EBX,2 ; ADVANCE SRC WORD
TEST ECX,ECX
JZ foo_30
MOV WORD PTR [EDX],CX
ADD EDX,2 ; ADVANCE DST WORD
JMP foo_10
foo_30:
XOR ECX,ECX
MOV DWORD PTR [EDX],ECX ; TERMINATION
buff1 DB "1234567890", 0, 0 ; TWO ZERO TERMINATION
w0w that works :cheekygreen: i really really appreciate it mate thank's alot :bg
hi again :) and if i wan't to delete the last char that is x?
ok i got it it's mov byte ptr ds:[sizeofinput+input-X],0 :wink thank's anyway
I thought I got the semantics right, but was only coding from memory. This should work, and should catch the case where the input string is empty. It will still need to be a multiple of two in size. But it looks more like a homework question than a practical application.
LEA EBX,buff1
LEA EDX,buff2
MOVZX ECX,WORD PTR [EBX] ; TWO ZERO BYTES TERMINATE
OR ECX,ECX
JZ foo_30 ; END
ADD EBX,2 ; ADVANCE SRC WORD
MOV WORD PTR [EDX],CX
ADD EDX,2 ; ADVANCE DST WORD
foo_10:
MOVZX ECX,WORD PTR [EBX] ; TWO ZERO BYTES TERMINATE
OR ECX,ECX
JZ foo_30 ; END
ADD EBX,2 ; ADVANCE SRC WORD
MOV BYTE PTR [EDX],'x'
INC EDX ; ADVANCE DST BYTE
MOV WORD PTR [EDX],CX
ADD EDX,2 ; ADVANCE DST WORD
JMP foo_10 ; LOOP
foo_30:
; ECX IMPLICITLY ZERO
MOV WORD PTR [EDX],CX ; TERMINATION WITH TWO ZEROS