From 78c4d3d06d8e863cfe2489281ccfe206544cbd7f Mon Sep 17 00:00:00 2001
From: hachem <im@hachem.wtf>
Date: Sun, 6 Sep 2026 00:40:37 +0200
Subject: fix: add utilities

---
 aoc-2025/day1.asm | 96 +++----------------------------------------------------
 1 file changed, 5 insertions(+), 91 deletions(-)

(limited to 'aoc-2025/day1.asm')

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
-- 
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