getline.asm

unix环境下实现的cmm语言编译器

section .text
global getline
getline:
push ebx
push edx
push ecx
push esi
push edi
push ebp
mov ebp,esp
mov edi, 0
jmp L3
L2:
cmp esi,10
jne near L5
jmp L4
L5:
mov ebx, dword [ebp+32]
sub ebx, 1
cmp edi,ebx
jne near L7
jmp L4
L7:
mov ebx, dword [ebp+28]
mov edx, edi
add edx, ebx
mov bx,si
mov byte  [edx], bl
mov ebx, edi
add ebx, 1
mov edi, ebx
L3:
call getchar
add esp, 0
mov esi, eax
cmp eax,-1
jne near L2
L4:
cmp esi,10
jne near L9
mov ebx, dword [ebp+28]
mov edx, edi
add edx, ebx
mov bx,si
mov byte  [edx], bl
mov ebx, edi
add ebx, 1
mov edi, ebx
L9:
mov ebx, dword [ebp+28]
mov edx, edi
add edx, ebx
mov byte  [edx], 0
mov eax,edi
jmp L1
L1:
mov esp,ebp
pop ebp
pop edi
pop esi
pop ecx
pop edx
pop ebx
ret
extern getchar