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/day2.asm | 94 +++----------------------------------------------------
 1 file changed, 4 insertions(+), 90 deletions(-)

(limited to 'aoc-2025/day2.asm')

diff --git a/aoc-2025/day2.asm b/aoc-2025/day2.asm
index c1ae232..987fbf9 100644
--- a/aoc-2025/day2.asm
+++ b/aoc-2025/day2.asm
@@ -5,18 +5,11 @@ 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"
+%include "utils/parse.asm"
 
 section .data
     input_path db "input/day2.txt", 0
-    newline   db 10
 
     label1 db "Part 1: ", 0
     label2 db "Part 2: ", 0
@@ -29,8 +22,6 @@ section .bss
     sum1         resq 1
     sum2         resq 1
 
-    number_buffer resb 32  ; for printing and number_to_string
-
 section .text
 
 _start:
@@ -139,7 +130,7 @@ print_results:
 handle_line:
 next_range:
     ; parse start
-    call    parse_int64
+    call    parse_u64
     mov     r13, rax
 
     cmp     byte [rsi], '-'
@@ -147,7 +138,7 @@ next_range:
     inc     rsi
 
     ; parse end
-    call    parse_int64
+    call    parse_u64
     mov     r14, rax
 
 range_loop:
@@ -186,26 +177,6 @@ after_range:
 done_line:
     ret
 
-; RSI points at decimal digits; stops on first non-digit
-parse_int64:
-    xor     rax, rax
-.parse:
-    mov     dl, [rsi]
-    cmp     dl, '0'
-    jl      .done
-    cmp     dl, '9'
-    jg      .done
-
-    sub     dl, '0'
-    movzx   rdx, dl
-    imul    rax, rax, 10
-    add     rax, rdx
-
-    inc     rsi
-    jmp     .parse
-.done:
-    ret
-
 ; number_to_string: convert RAX to decimal ASCII, MSB-first
 ;   Output:
 ;     RSI = pointer to first digit
@@ -351,60 +322,3 @@ check_invalid2:
     pop     rdx
     pop     rbx
     ret
-
-print_newline:
-    mov     rax, SYS_WRITE
-    mov     rdi, STDOUT
-    mov     rsi, newline
-    mov     rdx, 1
-    syscall
-    ret
-
-print_int64:
-    mov     rdi, number_buffer+31
-    mov     byte [rdi], 0
-    dec     rdi
-
-    cmp     rax, 0
-    jne     .conv
-
-    mov     byte [rdi], '0'
-    jmp     .done
-.conv:
-    mov     rbx, 10
-.next:
-    xor     rdx, rdx
-    div     rbx
-    add     dl, '0'
-    mov     [rdi], dl
-    dec     rdi
-    test    rax, rax
-    jnz     .next
-
-    inc     rdi
-.done:
-    mov     rax, SYS_WRITE
-    mov     rsi, rdi
-    mov     rdi, STDOUT
-    mov     rdx, number_buffer+31
-    sub     rdx, rsi
-    syscall
-    ret
-
-print_string:
-    push    rcx
-    push    rdx
-    mov     rdx, 0
-.length:
-    cmp     byte [rcx+rdx], 0
-    je      .submit
-    inc     rdx
-    jmp     .length
-.submit:
-    mov     rax, SYS_WRITE
-    mov     rdi, STDOUT
-    mov     rsi, rcx
-    syscall
-    pop     rdx
-    pop     rcx
-    ret
-- 
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