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avl.asm
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avl.asm
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%include "io.inc"
CEXTERN malloc
CEXTERN free
section .bss
op resd 1
key resd 1
val resd 1
root resd 1
section .text
get_int:
push ebp
mov ebp, esp
push ebx
sub esp, 20
mov ebx, dword[ebp + 8]; &x
mov dword[esp + 4], ebx
mov dword[esp], .rd
call scanf
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
section .rodata
.rd db "%d", 0
get_char:
push ebp
mov ebp, esp
push ebx
sub esp, 20
mov ebx, dword[ebp + 8]; &c
mov dword[esp + 4], ebx
mov dword[esp], .rc
call scanf
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
section .rodata
.rc db "%c", 0
print_int:
push ebp
mov ebp, esp
push ebx
sub esp, 20
mov ebx, dword[ebp + 8]; x
mov dword[esp + 4], ebx
mov dword[esp], .wd
call printf
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
section .rodata
.wd db "%d ", 0
print_endl:
push ebp
mov ebp, esp
push ebx
sub esp, 20
mov dword[esp], .endl
call printf
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
section .rodata
.endl db 10, 0
new_node:
push ebp
mov ebp, esp
push ebx
;dword[ebp + 8] - key
;dword[ebp + 12] - data
sub esp, 20
mov dword[esp], 20
call malloc
;eax - v0
mov ebx, dword[ebp + 8]; key
mov dword[eax], ebx; v->key = key
mov ebx, dword[ebp + 12]; data
mov dword[eax + 4], ebx; v->data = data
mov dword[eax + 8], 0; v->left = null
mov dword[eax + 12], 0; v->right = null
mov dword[eax + 16], 1; v->h = 1
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
free_node:
push ebp
mov ebp, esp
push ebx
;dword[ebp + 8] - v
sub esp, 20
cmp dword[ebp + 8], 0; if (v == NULL) return;
je .exit
mov ebx, dword[ebp + 8]; v
mov dword[esp], ebx
call free
.exit:
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
is_leaf:
push ebp
mov ebp, esp
push ebx
;dword[ebp + 8] - v
mov eax, 0; ans = 0
cmp dword[ebp + 8], 0; if (v == null) return 0;
je .exit
mov ebx, dword[ebp + 8];v
cmp dword[ebx + 8], 0
jne .exit; if (v->left != null) return 0;
cmp dword[ebx + 12], 0
jne .exit; if (v->right != null) return 0;
mov eax, 1; ans = 1
.exit:
pop ebx
mov esp, ebp
pop ebp
ret
get_h:
push ebp
mov ebp, esp
push ebx
;dword[ebp + 8] - v
mov eax, 0; h = 0
cmp dword[ebp + 8], 0; if (v == null) return 0;
je .exit
mov ebx, dword[ebp + 8];v
mov eax, dword[ebx + 16]; v->h
.exit:
pop ebx
mov esp, ebp
pop ebp
ret
update:
push ebp
mov ebp, esp
push ebx
sub esp, 20
;dword[ebp + 8] - v
mov eax, 0
cmp dword[ebp + 8], 0; if (v == null) return 0;
je .exit
mov ecx, dword[ebp + 8];v
mov ecx, dword[ecx + 8]; v->left
mov dword[esp], ecx
call get_h
mov ebx, eax; save v->left->h
mov ecx, dword[ebp + 8];v
mov ecx, dword[ecx + 12]; v->right
mov dword[esp], ecx
call get_h
mov edx, eax; v->right->h
cmp ebx, edx
jnl .skip
mov ebx, edx
.skip:
inc ebx
mov eax, dword[ebp + 8]; v
mov dword[eax + 16], ebx; v->h = max(h[L], h[R]) + 1
mov eax, dword[ebp + 8]; return v
.exit:
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
get_diff:
push ebp
mov ebp, esp
push ebx
;dword[ebp + 8] - v
mov eax, 0; diff = 0
cmp dword[ebp + 8], 0; if (v == null) return 0;
je .exit
mov ecx, dword[ebp + 8];v
push dword[ecx + 8]; v->left
call get_h
pop edx
mov ebx, eax; save v->left->h
mov ecx, dword[ebp + 8];v
push dword[ecx + 12]; v->right
call get_h
pop edx
mov edx, eax; v->right->h
sub ebx, edx; diff
mov eax, ebx
.exit:
pop ebx
mov esp, ebp
pop ebp
ret
add_node:
push ebp
mov ebp, esp
push ebx
sub esp, 20
;dword[ebp + 8] - v
;dword[ebp + 12] - key
;dword[ebp + 16] - data
cmp dword[ebp + 8], 0
jne .skip1
;if (v == null)
mov ebx, dword[ebp + 16]; data
mov dword[esp + 4], ebx
mov ebx, dword[ebp + 12]; key
mov dword[esp], ebx
call new_node; return new_node
jmp .exit
.skip1:
mov ebx, dword[ebp + 8]; v
mov ebx, dword[ebx]; v->key
cmp ebx, dword[ebp + 12]
jl .R
cmp ebx, dword[ebp + 12]
jne .L
;if (v->key == key)
; v->data = data
mov ebx, dword[ebp + 8]; v
mov ecx, dword[ebp + 16]; data
mov dword[ebx + 4], ecx; v->data = data
mov eax, dword[ebp + 8]; return v
jmp .exit
.L:
;if (v->key > key)
; v->left = add_node(v->left, key, data)
mov ebx, dword[ebp + 8]; v
mov ebx, dword[ebx + 8]; v->left
mov ecx, dword[ebp + 16]; data
mov dword[esp + 8], ecx
mov ecx, dword[ebp + 12]; key
mov dword[esp + 4], ecx
mov dword[esp], ebx; v->left
call add_node
mov ebx, dword[ebp + 8]; v
mov dword[ebx + 8], eax; v->left = add_node(v->left, key, data);
mov eax, dword[ebp + 8]; v
mov dword[esp], eax
call update
mov eax, dword[ebp + 8]; return v;
jmp .exit
.R:
;if (v->key < key)
; v->right = add_node(v->right, key, data)
mov ebx, dword[ebp + 8]; v
mov ebx, dword[ebx + 12]; v->right
mov ecx, dword[ebp + 16]; data
mov dword[esp + 8], ecx
mov ecx, dword[ebp + 12]; key
mov dword[esp + 4], ecx
mov dword[esp], ebx; v->right
call add_node
mov ebx, dword[ebp + 8]; v
mov dword[ebx + 12], eax; v->right = add_node(v->right, key, data);
mov eax, dword[ebp + 8]; v
mov dword[esp], eax
call update
mov eax, dword[ebp + 8]; return v;
.exit:
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
find_max:
push ebp
mov ebp, esp
push ebx
sub esp, 20
cmp dword[ebp + 8], 0
je .exit
mov eax, dword[ebp + 8]; v
mov eax, dword[eax + 12]; v->right
cmp eax, 0
jne .rec
;if (v->right == NULL)
; return v
mov eax, dword[ebp + 8]
jmp .exit
.rec:
mov dword[esp], eax
call find_max
.exit:
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
del_max:
push ebp
mov ebp, esp
push ebx
sub esp, 20
cmp dword[ebp + 8], 0
je .exit
mov eax, dword[ebp + 8]; v
mov eax, dword[eax + 12]; v->right
cmp eax, 0
jne .rec
;if (v->right == NULL)
; free(v)
; return v->left
mov eax, dword[ebp + 8]; v
mov ebx, dword[eax + 8]; v->left
mov dword[esp], eax; free(v)
call free_node
mov eax, ebx; return v->left
jmp .exit
.rec:
mov dword[esp], eax
call del_max
mov ebx, dword[ebp + 8]; v
mov dword[ebx + 12], eax; v->right = del_max(v->right)
mov eax, dword[ebp + 8]
mov dword[esp], eax
call update
mov eax, dword[ebp + 8]; return v;
.exit:
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
del_node:
push ebp
mov ebp, esp
push ebx
sub esp, 20
mov eax, 0
cmp dword[ebp + 8], 0; if (v == null) return;
je .exit
mov eax, dword[ebp + 8];v
mov eax, dword[eax]; v->key
cmp eax, dword[ebp + 12]
jl .R
cmp eax, dword[ebp + 12]
jne .L
;if (v->key == key)
; DEL :)
mov eax, dword[ebp + 8];v
mov dword[esp], eax
call is_leaf
cmp eax, 0
je .not_leaf
;if (is_leaf(v))
; free(v)
; return NULL
mov eax, dword[ebp + 8]; v
mov dword[esp], eax
call free_node
mov dword[ebp + 8], 0
mov eax, 0; return NULL
jmp .exit
.not_leaf:
mov eax, dword[ebp + 8]; v
mov eax, dword[eax + 8]; v->left
cmp eax, 0
je .no_left
;if (v->left)
mov eax, dword[ebp + 8]; v
mov eax, dword[eax + 12]; v->right
cmp eax, 0
je .only_left
;if (v->left && v->right)
; DIFFICULT !
mov eax, dword[ebp + 8]; v
mov eax, dword[eax + 8]; v->left
mov dword[esp], eax
call find_max
mov ebx, dword[eax]; v_max->key
mov ecx, dword[ebp + 8];v
mov dword[ecx], ebx; v->key = v_max->key
mov ebx, dword[eax + 4]; v_max->data
mov ecx, dword[ebp + 8];v
mov dword[ecx + 4], ebx; v->data = v_max->data
mov eax, dword[ebp + 8]; v
mov eax, dword[eax + 8]; v->left
mov dword[esp], eax
call del_max
mov ebx, dword[ebp + 8]; v
mov dword[ebx + 8], eax; v->left = del_max(v->left)
mov eax, dword[ebp + 8]
mov dword[esp], eax
call update
mov eax, dword[ebp + 8];return v
jmp .exit
.only_left:
;free(v)
;return v->left
mov ebx, dword[ebp + 8]; v
mov ebx, dword[ebx + 8]; v->left
mov eax, dword[ebp + 8]; v
mov dword[esp], eax
call free_node
mov eax, ebx; return v->left
jmp .exit
.no_left:
;free(v)
;return v->right
mov ebx, dword[ebp + 8]; v
mov ebx, dword[ebx + 12]; v->right
mov eax, dword[ebp + 8]; v
mov dword[esp], eax
call free_node
mov eax, ebx; return v->right
jmp .exit
.L:
;if (v->key > key)
; v->left = del_node(v->left, key)
mov eax, dword[ebp + 8]; v
mov eax, dword[eax + 8]; v->left
mov ebx, dword[ebp + 12]; key
mov dword[esp + 4], ebx; key
mov dword[esp], eax; v->left
call del_node
mov ebx, dword[ebp + 8]; v
mov dword[ebx + 8], eax; v->left = del_node(v->left, key)
mov eax, dword[ebp + 8];v
mov dword[esp], eax
call update
mov eax, dword[ebp + 8];return v
jmp .exit
.R:
;if (v->key < key)
; v = del_node(v->right, key)
mov eax, dword[ebp + 8]; v
mov eax, dword[eax + 12]; v->right
mov ebx, dword[ebp + 12]; key
mov dword[esp + 4], ebx; key
mov dword[esp], eax; v->right
call del_node
mov ebx, dword[ebp + 8]; v
mov dword[ebx + 12], eax; v->right = del_node(v->right, key)
mov eax, dword[ebp + 8];v
mov dword[esp], eax
call update
mov eax, dword[ebp + 8];return v
.exit:
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
find_node:
push ebp
mov ebp, esp
push ebx
sub esp, 20
; dword[ebp + 8] - v
; dword[ebp + 12] - key
cmp dword[ebp + 8], 0
je .exit; if (v == null) return;
mov eax, dword[ebp + 8]; v
mov eax, dword[eax]; v->key
cmp eax, dword[ebp + 12]; key
jl .R
cmp eax, dword[ebp + 12]; key
jne .L
;if (v->key == key)
; print_node(v)
mov eax, dword[ebp + 8]; v
mov eax, dword[eax]; v->key
mov dword[esp], eax
call print_int
mov eax, dword[ebp + 8]; v
mov eax, dword[eax + 4]; v->data
mov dword[esp], eax
call print_int
call print_endl
jmp .exit
.L:
;if (v->key > key)
; find_node(v->left, key, data)
mov eax, dword[ebp + 8]; v
mov eax, dword[eax + 8]; v->left
mov ebx, dword[ebp + 12]; key
mov dword[esp + 4], ebx
mov dword[esp], eax
call find_node
jmp .exit
.R:
;if (v->key < key)
; find_node(v->right, key, data)
mov eax, dword[ebp + 8]; v
mov eax, dword[eax + 12]; v->right
mov ebx, dword[ebp + 12]; key
mov dword[esp + 4], ebx
mov dword[esp], eax
call find_node
.exit:
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
print_tree:
push ebp
mov ebp, esp
push ebx
sub esp, 20
cmp dword[ebp + 8], 0; if (v == null) return
je .exit
mov ebx, dword[ebp + 8]; v
mov ebx, dword[ebx + 8]; v->left
mov dword[esp], ebx
call print_tree
mov ebx, dword[ebp + 8]; v
mov ebx, dword[ebx]; v->key
mov dword[esp], ebx
call print_int
;mov ebx, dword[ebp + 8]; v
;PRINT_STRING "("
;PRINT_DEC 4, [ebx + 16]
;PRINT_STRING ") "
mov ebx, dword[ebp + 8]; v
mov ebx, dword[ebx + 12]; v->right
mov dword[esp], ebx
call print_tree
.exit:
add esp, 20
pop ebx
mov esp, ebp
pop ebp
ret
global CMAIN
CMAIN:
push ebp
mov ebp, esp
sub esp, 24
.loop:
mov dword[esp], op
call get_char
cmp eax, 0
je .break
cmp dword[op], "A"
jne .skip1
;if (op == 'A')
mov dword[esp], key
call get_int
mov dword[esp], val
call get_int
mov eax, dword[val]
mov dword[esp + 8], eax
mov eax, dword[key]
mov dword[esp + 4], eax
mov eax, dword[root]
mov dword[esp], eax
call add_node
mov dword[root], eax
jmp .end
.skip1:
cmp dword[op], "D"
jne .skip2
;if (op == 'D')
mov dword[esp], key
call get_int
mov eax, dword[key]
mov dword[esp + 4], eax
mov eax, dword[root]
mov dword[esp], eax
call del_node
mov dword[root], eax
jmp .end
.skip2:
cmp dword[op], "S"
jne .skip3
;if (op == 'S')
mov dword[esp], key
call get_int
mov eax, dword[key]
mov dword[esp + 4], eax
mov eax, dword[root]
mov dword[esp], eax
call find_node
jmp .end
.skip3:
cmp dword[op], "F"
jne .end
;if (op == 'F')
jmp .break
.end:
;PRINT_STRING "tree:"
;NEWLINE
;push dword[root]
;call print_tree
;pop edx
;NEWLINE
;NEWLINE
;read "\n"
mov dword[esp], op
call get_char
jmp .loop
.break:
add esp, 24
mov esp, ebp
pop ebp
xor eax, eax
ret