day 3 part 1
This commit is contained in:
Lucia Ceionia
parent
f9d0e13336
commit
f805701abf
@ -60,7 +60,7 @@ cmp al, 9
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jle .got_char
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.no_input:
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stc ; set CF
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jmp .dec_done
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jmp .done
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.loop:
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lodsb
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sub al, '0'
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@ -72,8 +72,9 @@ xchg edi,eax
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mul ebx
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add edi,eax
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jmp .loop
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clc ; clear CF
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.dec_done:
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clc ; clear CF
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.done:
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mov eax,edi
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pop edi
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pop edx
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3
03/Makefile
Normal file
3
03/Makefile
Normal file
@ -0,0 +1,3 @@
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all:
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nasm -g -felf32 main.s && ld -melf_i386 -g main.o
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140
03/input
Normal file
140
03/input
Normal file
@ -0,0 +1,140 @@
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416.........................559...............417...............785.......900.......284...........503...796....992..........................
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.........702*....772............378..569.........&.49..606...14*..............$.453*.........307....*......$.....-.................995......
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.........................*.........207...*..24................402.=...........................@....................../...162................
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....691........341.262..36.549...........386........437.............................662...........848............#......*...................
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.......................*..........936...*...............................-...........*......516....%......358....707..535...........841......
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..........646................901..*.............*......134...........517..2..287........513...............................644...*...........
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.....................596............*............................./.287............852....623....@.*..............@........168...965..*17...
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...........................51.......681........................271..........719.......................964......399..426...............456...
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10
03/input_test1
Normal file
10
03/input_test1
Normal file
@ -0,0 +1,10 @@
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467..114..
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...*......
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..35..633.
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......#...
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617*......
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.....+.58.
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..592.....
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......755.
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...$.*....
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.664.598..
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179
03/main.s
Normal file
179
03/main.s
Normal file
@ -0,0 +1,179 @@
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%define BUFF_LIM 32768
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;%define GRID_X 10
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;%define GRID_Y 10
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%define GRID_X 140
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%define GRID_Y 140
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global _start
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[bits 32]
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[section .text]
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%include "utils.s"
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_start:
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mov ebx, filename
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call open_file
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mov ecx, read_buff
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mov edx, BUFF_LIM
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call read_file
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add eax, read_buff
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mov [file_lim], eax
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; 1. read file into array,
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; padding edges by 1
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read_to_array:
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mov esi, read_buff
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; first line padded by .
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mov edi, array
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mov ecx, (GRID_X+2)
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mov al, '.'
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rep stosb
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mov ecx, GRID_Y ; line count
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.read_lines:
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; 1 char pad before line
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mov al, '.'
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stosb
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push ecx
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.read_chars:
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mov ecx, GRID_X ; line len (discluding newline)
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rep movsb ; copy line
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inc esi ; skip newline
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mov al, '.'
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stosb ; pad with .
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pop ecx
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loop .read_lines
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; fill last line with .
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mov ecx, (GRID_X+2)
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mov al, '.'
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rep stosb
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; 2. find numbers, putting indexes
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; into numbers array in the index array
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find_numbers:
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push 1 ; current number index
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xor ecx, ecx ; index
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.find_next:
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; check for end of array
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cmp ecx, (GRID_X+2)*(GRID_Y*2)
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jge .done
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lea esi, [ecx+array] ; current char
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mov edi, esi ; number start if num
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call dec_parse
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jnc .has_num
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; no number
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inc ecx
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jmp .find_next
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.has_num:
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sub esi, edi ; get number char length
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add esi, ecx ; add to index
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dec esi
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; write to index and to numbers
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pop ebx ; cur num idx
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mov [numbers+ebx*4], eax ; save number value
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.write_idx:
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mov [index+ecx*2], bx
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; overwrite digits with .
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mov byte [array+ecx], '.'
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inc ecx
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cmp ecx, esi
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jl .write_idx
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inc ecx
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; push new cur num idx
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inc ebx
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push ebx
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jmp .find_next
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.done:
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add esp, 4 ; no more cur num idx
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; 3. go through array, checking the neighbors of
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; numbers for symbols, skip *last added index*,
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; adding numbers with sym neighbors to final_value
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check_neighbors:
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xor ecx, ecx ; index
|
||||
dec ecx ; gets incremented immediately
|
||||
xor ebx, ebx ; last added idx
|
||||
mov esi, array
|
||||
mov edi, index
|
||||
.check_next_number:
|
||||
; check for end of array
|
||||
inc ecx
|
||||
cmp ecx, (GRID_X+2)*(GRID_Y*2)
|
||||
jge .done
|
||||
; check if num
|
||||
movzx eax, word [index+ecx*2]
|
||||
test eax, eax
|
||||
jz .check_next_number
|
||||
.found_num:
|
||||
; check if last added idx
|
||||
cmp eax, ebx
|
||||
je .check_next_number ; is last added idx, skip
|
||||
.check_symbols:
|
||||
lea edx, [ecx+array] ; current char
|
||||
; right
|
||||
cmp byte [edx+1], '.'
|
||||
je .r_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.r_nsym:
|
||||
; left
|
||||
cmp byte [edx-1], '.'
|
||||
je .l_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.l_nsym:
|
||||
; top
|
||||
cmp byte [edx-(GRID_X+2)], '.'
|
||||
je .t_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.t_nsym:
|
||||
; bottom
|
||||
cmp byte [edx+(GRID_X+2)], '.'
|
||||
je .b_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.b_nsym:
|
||||
; top left
|
||||
cmp byte [edx-((GRID_X+2)+1)], '.'
|
||||
je .tl_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.tl_nsym:
|
||||
; top right
|
||||
cmp byte [edx-((GRID_X+2)-1)], '.'
|
||||
je .tr_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.tr_nsym:
|
||||
; bottom left
|
||||
cmp byte [edx+((GRID_X+2)-1)], '.'
|
||||
je .bl_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.bl_nsym:
|
||||
; bottom right
|
||||
cmp byte [edx+((GRID_X+2)+1)], '.'
|
||||
je .br_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.br_nsym:
|
||||
; there's no symbol neighbor
|
||||
; get next number
|
||||
jmp .check_next_number
|
||||
.has_sym_neighbor:
|
||||
; we have a symbol neighbor!
|
||||
; add to final value
|
||||
mov edx, [numbers+eax*4]
|
||||
add [final_value], edx
|
||||
; set last added idx
|
||||
mov ebx, eax
|
||||
; get next number
|
||||
jmp .check_next_number
|
||||
.done:
|
||||
; we can print final value
|
||||
mov eax, [final_value]
|
||||
call print_dec
|
||||
jmp exit
|
||||
|
||||
[section .data]
|
||||
file_lim: dd 0
|
||||
final_value: dd 0
|
||||
filename: db "input",0
|
||||
|
||||
[section .bss]
|
||||
numbers: resd 2048
|
||||
array: resb (GRID_X+2)*(GRID_Y*2)
|
||||
index: resw (GRID_X+2)*(GRID_Y*2)
|
||||
read_buff: resb BUFF_LIM
|
||||
179
03/main_part1.s
Normal file
179
03/main_part1.s
Normal file
@ -0,0 +1,179 @@
|
||||
%define BUFF_LIM 32768
|
||||
;%define GRID_X 10
|
||||
;%define GRID_Y 10
|
||||
%define GRID_X 140
|
||||
%define GRID_Y 140
|
||||
|
||||
global _start
|
||||
[bits 32]
|
||||
[section .text]
|
||||
|
||||
%include "utils.s"
|
||||
|
||||
_start:
|
||||
mov ebx, filename
|
||||
call open_file
|
||||
mov ecx, read_buff
|
||||
mov edx, BUFF_LIM
|
||||
call read_file
|
||||
add eax, read_buff
|
||||
mov [file_lim], eax
|
||||
|
||||
; 1. read file into array,
|
||||
; padding edges by 1
|
||||
read_to_array:
|
||||
mov esi, read_buff
|
||||
; first line padded by .
|
||||
mov edi, array
|
||||
mov ecx, (GRID_X+2)
|
||||
mov al, '.'
|
||||
rep stosb
|
||||
mov ecx, GRID_Y ; line count
|
||||
.read_lines:
|
||||
; 1 char pad before line
|
||||
mov al, '.'
|
||||
stosb
|
||||
push ecx
|
||||
.read_chars:
|
||||
mov ecx, GRID_X ; line len (discluding newline)
|
||||
rep movsb ; copy line
|
||||
inc esi ; skip newline
|
||||
mov al, '.'
|
||||
stosb ; pad with .
|
||||
pop ecx
|
||||
loop .read_lines
|
||||
; fill last line with .
|
||||
mov ecx, (GRID_X+2)
|
||||
mov al, '.'
|
||||
rep stosb
|
||||
|
||||
; 2. find numbers, putting indexes
|
||||
; into numbers array in the index array
|
||||
find_numbers:
|
||||
push 1 ; current number index
|
||||
xor ecx, ecx ; index
|
||||
.find_next:
|
||||
; check for end of array
|
||||
cmp ecx, (GRID_X+2)*(GRID_Y*2)
|
||||
jge .done
|
||||
lea esi, [ecx+array] ; current char
|
||||
mov edi, esi ; number start if num
|
||||
call dec_parse
|
||||
jnc .has_num
|
||||
; no number
|
||||
inc ecx
|
||||
jmp .find_next
|
||||
.has_num:
|
||||
sub esi, edi ; get number char length
|
||||
add esi, ecx ; add to index
|
||||
dec esi
|
||||
; write to index and to numbers
|
||||
pop ebx ; cur num idx
|
||||
mov [numbers+ebx*4], eax ; save number value
|
||||
.write_idx:
|
||||
mov [index+ecx*2], bx
|
||||
; overwrite digits with .
|
||||
mov byte [array+ecx], '.'
|
||||
inc ecx
|
||||
cmp ecx, esi
|
||||
jl .write_idx
|
||||
inc ecx
|
||||
; push new cur num idx
|
||||
inc ebx
|
||||
push ebx
|
||||
jmp .find_next
|
||||
.done:
|
||||
add esp, 4 ; no more cur num idx
|
||||
|
||||
; 3. go through array, checking the neighbors of
|
||||
; numbers for symbols, skip *last added index*,
|
||||
; adding numbers with sym neighbors to final_value
|
||||
check_neighbors:
|
||||
xor ecx, ecx ; index
|
||||
dec ecx ; gets incremented immediately
|
||||
xor ebx, ebx ; last added idx
|
||||
mov esi, array
|
||||
mov edi, index
|
||||
.check_next_number:
|
||||
; check for end of array
|
||||
inc ecx
|
||||
cmp ecx, (GRID_X+2)*(GRID_Y*2)
|
||||
jge .done
|
||||
; check if num
|
||||
movzx eax, word [index+ecx*2]
|
||||
test eax, eax
|
||||
jz .check_next_number
|
||||
.found_num:
|
||||
; check if last added idx
|
||||
cmp eax, ebx
|
||||
je .check_next_number ; is last added idx, skip
|
||||
.check_symbols:
|
||||
lea edx, [ecx+array] ; current char
|
||||
; right
|
||||
cmp byte [edx+1], '.'
|
||||
je .r_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.r_nsym:
|
||||
; left
|
||||
cmp byte [edx-1], '.'
|
||||
je .l_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.l_nsym:
|
||||
; top
|
||||
cmp byte [edx-(GRID_X+2)], '.'
|
||||
je .t_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.t_nsym:
|
||||
; bottom
|
||||
cmp byte [edx+(GRID_X+2)], '.'
|
||||
je .b_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.b_nsym:
|
||||
; top left
|
||||
cmp byte [edx-((GRID_X+2)+1)], '.'
|
||||
je .tl_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.tl_nsym:
|
||||
; top right
|
||||
cmp byte [edx-((GRID_X+2)-1)], '.'
|
||||
je .tr_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.tr_nsym:
|
||||
; bottom left
|
||||
cmp byte [edx+((GRID_X+2)-1)], '.'
|
||||
je .bl_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.bl_nsym:
|
||||
; bottom right
|
||||
cmp byte [edx+((GRID_X+2)+1)], '.'
|
||||
je .br_nsym
|
||||
jmp .has_sym_neighbor
|
||||
.br_nsym:
|
||||
; there's no symbol neighbor
|
||||
; get next number
|
||||
jmp .check_next_number
|
||||
.has_sym_neighbor:
|
||||
; we have a symbol neighbor!
|
||||
; add to final value
|
||||
mov edx, [numbers+eax*4]
|
||||
add [final_value], edx
|
||||
; set last added idx
|
||||
mov ebx, eax
|
||||
; get next number
|
||||
jmp .check_next_number
|
||||
.done:
|
||||
; we can print final value
|
||||
mov eax, [final_value]
|
||||
call print_dec
|
||||
jmp exit
|
||||
|
||||
[section .data]
|
||||
file_lim: dd 0
|
||||
final_value: dd 0
|
||||
filename: db "input",0
|
||||
|
||||
[section .bss]
|
||||
numbers: resd 2048
|
||||
array: resb (GRID_X+2)*(GRID_Y*2)
|
||||
index: resw (GRID_X+2)*(GRID_Y*2)
|
||||
read_buff: resb BUFF_LIM
|
||||
120
03/utils.s
Normal file
120
03/utils.s
Normal file
@ -0,0 +1,120 @@
|
||||
; call # val val2
|
||||
; int $0x80 eax eax edx -
|
||||
;
|
||||
; arg1 arg2 arg3 arg4 arg5 arg6 arg7
|
||||
; ebx ecx edx esi edi ebp -
|
||||
|
||||
exit:
|
||||
mov eax, 1 ; exit
|
||||
int 0x80
|
||||
|
||||
; filename in EBX
|
||||
; return handle in EBX
|
||||
; read only
|
||||
open_file:
|
||||
push eax
|
||||
push ecx
|
||||
mov eax, 5 ; open
|
||||
xor ecx, ecx ; read only
|
||||
int 0x80
|
||||
mov ebx, eax
|
||||
pop ecx
|
||||
pop eax
|
||||
ret
|
||||
|
||||
; file handle in EBX
|
||||
; buffer in ECX
|
||||
; count of bytes to read in EDX
|
||||
; return bytes actually read in EAX
|
||||
; exits on error
|
||||
read_file:
|
||||
mov eax, 3 ; read
|
||||
int 0x80
|
||||
test eax, eax
|
||||
js .err
|
||||
ret
|
||||
.err:
|
||||
mov eax, 4 ; write
|
||||
mov ebx, 1 ; stdout
|
||||
mov ecx, .err_str
|
||||
mov edx, 21
|
||||
int 0x80
|
||||
jmp exit
|
||||
.err_str: db `Could not read file.\n`
|
||||
|
||||
; string input in ESI
|
||||
; value in EAX
|
||||
; CF set if none, clear if some
|
||||
; ESI set past checked area
|
||||
dec_parse:
|
||||
push ebx
|
||||
push edx
|
||||
push edi
|
||||
xor eax, eax
|
||||
xor edi, edi
|
||||
mov ebx, 10 ; base
|
||||
lodsb
|
||||
sub al, '0'
|
||||
js .no_input
|
||||
cmp al, 9
|
||||
jle .got_char
|
||||
.no_input:
|
||||
stc ; set CF
|
||||
jmp .done
|
||||
.loop:
|
||||
lodsb
|
||||
sub al, '0'
|
||||
js .dec_done
|
||||
cmp al, 9
|
||||
jg .dec_done
|
||||
.got_char:
|
||||
xchg edi,eax
|
||||
mul ebx
|
||||
add edi,eax
|
||||
jmp .loop
|
||||
.dec_done:
|
||||
clc ; clear CF
|
||||
.done:
|
||||
mov eax,edi
|
||||
pop edi
|
||||
pop edx
|
||||
pop ebx
|
||||
ret
|
||||
|
||||
; input in EAX, all regs unmodified
|
||||
print_dec:
|
||||
pushad ; save regs
|
||||
; max 4294967296 is 10 chars
|
||||
; round to nearest 32-bit boundary
|
||||
sub esp, 12
|
||||
; string in ECX, length in EDX
|
||||
lea ecx, [esp+11] ; last possible byte
|
||||
; check for 0
|
||||
test eax, eax
|
||||
jz .zero
|
||||
mov ebx, 10 ; base 10
|
||||
xor esi, esi ; counter
|
||||
.div_shit:
|
||||
xor edx, edx
|
||||
; divide
|
||||
div ebx
|
||||
dec ecx ; next char
|
||||
inc esi
|
||||
; store
|
||||
add dl, '0'
|
||||
mov byte [ecx], dl
|
||||
; check if done
|
||||
test eax, eax
|
||||
jnz .div_shit ; continue
|
||||
mov edx, esi ; counter in edx
|
||||
jmp .write
|
||||
.zero:
|
||||
mov byte [ecx], '0'
|
||||
mov edx, 1 ; length
|
||||
.write:
|
||||
mov eax, 4 ; write
|
||||
mov ebx, 1 ; stdout
|
||||
int 0x80
|
||||
add esp, 12 ; restore stack
|
||||
popad ; restore regs
|
||||
ret
|
||||
Loading…
Reference in New Issue
Block a user