fix: add utilities

1 files changed, 5 insertions, 91 deletions

diff --git a/aoc-2025/day1.asm b/aoc-2025/day1.asm
index f130675..928e7a5 100644
--- a/aoc-2025/day1.asm
+++ b/aoc-2025/day1.asm
@@ -5,18 +5,10 @@ default rel
 

 global _start

 

-%define SYS_EXIT   60

-%define SYS_READ   0

-%define SYS_WRITE  1

-%define SYS_OPEN   2

-%define SYS_CLOSE  3

-

-%define O_RDONLY   0

-%define STDOUT     1

+%include "utils/io.asm"

 

 section .data

     input_path db "input/day1.txt", 0

-    newline   db 10

 

     label1 db "Password 1: ", 0

     label2 db "Password 2: ", 0

@@ -30,7 +22,6 @@ section .data
 section .bss

     buffer       resb 4096

     line_buffer   resb 256

-    number_buffer resb 16

     line_len      resd 1

 

 section .text

@@ -128,26 +119,14 @@ print_results:
     mov     rcx, label1

     call    print_string

     mov     eax, [password1]

-    call    print_int

-

-    ; newline

-    mov     rax, SYS_WRITE

-    mov     rdi, STDOUT

-    mov     rsi, newline

-    mov     rdx, 1

-    syscall

+    call    print_int64

+    call    print_newline

 

     mov     rcx, label2

     call    print_string

     mov     eax, [password2]

-    call    print_int

-

-    ; new linhe

-    mov     rax, SYS_WRITE

-    mov     rdi, STDOUT

-    mov     rsi, newline

-    mov     rdx, 1

-    syscall

+    call    print_int64

+    call    print_newline

 

     mov     rax, SYS_CLOSE

     mov     rdi, r12

@@ -247,68 +226,3 @@ parse_int:
     jmp     .parse_loop

 .done:

     ret

-

-print_int:

-    mov     edi, number_buffer+15  ; write digits from the end

-    mov     byte [rdi], 0          ; terminator

-    dec     rdi

-

-    cmp     eax, 0

-    jne     .convert

-    mov     byte [rdi], '0'

-    jmp     .finish

-.convert:

-    ; we will repeatedly compute:

-    ;   q = eax / 10

-    ;   r = eax % 10

-    ; using only subtraction

-.next_digit:

-    mov     edx, eax  ; tmp = current value

-    mov     ecx, 0    ; q = 0

-

-    cmp     edx, 10  ; if < 0,  q=0, r=edx

-    jb      .last_digit

-.sub_loop:

-    sub     edx, 10

-    inc     ecx  ; q++

-    cmp     edx, 10

-    jae     .sub_loop  ; while tmp >= 10

-.last_digit:

-    ; now:

-    ;   ecx = quotient

-    ;   edx = remainder (0..9)

-    add     dl, '0'

-    mov     [rdi], dl  ; store digit

-    dec     rdi

-    mov     eax, ecx  ; eax = quotient

-    test    eax, eax

-    jnz     .next_digit  ; more digits to extract?

-

-    inc     rdi  ; move to first digit

-.finish:

-    mov     rax, SYS_WRITE

-    mov     rsi, rdi  ; buffer pointer

-    mov     rdi, STDOUT

-    mov     rdx, number_buffer+15

-    sub     rdx, rsi  ; length

-    syscall

-    ret

-

-print_string:

-    push    rcx

-    push    rdx

-    mov     rdx, 0

-.count:

-    cmp     byte [rcx+rdx], 0

-    je      .done_count

-    inc     rdx

-    jmp     .count

-.done_count:

-    mov     rax, SYS_WRITE

-    mov     rdi, STDOUT

-    mov     rsi, rcx

-    syscall

-

-    pop     rdx

-    pop     rcx

-    ret