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/day12.asm | 120 ++++-------------------------------------------------
 1 file changed, 8 insertions(+), 112 deletions(-)

(limited to 'aoc-2025/day12.asm')

diff --git a/aoc-2025/day12.asm b/aoc-2025/day12.asm
index 6eb64a9..8931a2b 100644
--- a/aoc-2025/day12.asm
+++ b/aoc-2025/day12.asm
@@ -5,14 +5,8 @@ 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"
 
 %define RAW_SIZE   262144
 %define GRID_SIZE  4096          ; regions are at most 50x50
@@ -20,8 +14,6 @@ global _start
 section .data
     input_path db "input/day12.txt", 0
 
-    newline    db 10
-
     label1     db "Part 1: ", 0
 
 section .bss
@@ -54,35 +46,14 @@ section .bss
     left          resq 1
     count_feasible resq 1
 
-    number_buffer resb 32
-
 section .text
 
 _start:
-    mov     rax, SYS_OPEN
     mov     rdi, input_path
-    mov     rsi, O_RDONLY
-    xor     rdx, rdx
-    syscall
-    mov     r12, rax
-
-    xor     r13, r13
-read_loop:
-    mov     rax, SYS_READ
-    mov     rdi, r12
-    lea     rsi, [raw + r13]
+    lea     rsi, [raw]
     mov     rdx, RAW_SIZE
-    sub     rdx, r13
-    syscall
-    cmp     rax, 0
-    jle     read_done
-    add     r13, rax
-    jmp     read_loop
-read_done:
-    mov     [raw_len], r13
-    mov     rax, SYS_CLOSE
-    mov     rdi, r12
-    syscall
+    call    read_file
+    mov     [raw_len], rax
 
     ; parse shapes and regions
     lea     rsi, [raw]
@@ -106,7 +77,7 @@ pline:
     cmp     al, '9'
     jg      maybe_grid
     ; a number begins the line
-    call    parse_num
+    call    parse_u64
     mov     r10, rax
     mov     al, [rsi]
     cmp     al, 'x'
@@ -127,7 +98,7 @@ region_line:
     mov     qword [orients_done], 1
 .have:
     inc     rsi                 ; skip 'x'
-    call    parse_num
+    call    parse_u64
     mov     r11, rax            ; L
 .find_colon:
     mov     al, [rsi]
@@ -145,7 +116,7 @@ region_line:
     inc     rsi
     jmp     .rsp
 .rsp_done:
-    call    parse_num
+    call    parse_u64
     mov     [counts + rcx*8], rax
     inc     rcx
     jmp     .rcounts
@@ -215,24 +186,6 @@ pdone:
     xor     rdi, rdi
     syscall
 
-; parse_num: read decimal at [RSI], advancing RSI. Clobbers RAX, RDX.
-parse_num:
-    xor     rax, rax
-.d:
-    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     .d
-.done:
-    ret
-
 ; gen_orients: build the 8 dihedral orientations of every shape as offset lists
 ; anchored at their row-major-first cell.
 gen_orients:
@@ -531,60 +484,3 @@ rec:
     pop     rbp
     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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