From 7c4698850871ac7c142f8957fa5d10ca0b309b31 Mon Sep 17 00:00:00 2001
From: Kwarde <kevin@kwarde.com>
Date: Thu, 24 Jul 2025 20:32:49 +0200
Subject: [PATCH] FIX printf: '%0(invalid)' as-is (don't exclude '%')

---
 src/console.asm | 12 +++++++-----
 1 file changed, 7 insertions(+), 5 deletions(-)

diff --git a/src/console.asm b/src/console.asm
index bbf7ef9..516591a 100644
--- a/src/console.asm
+++ b/src/console.asm
@@ -222,6 +222,7 @@ printf:
 		je	.wrapup
 		cmp	byte [rdi + 1], '%'
 		je	.rep_pct
+		xor	r12, r12
 		; Include specifier (r13 bit0=1) or not (bit0=0)
 		xor	r13, r13
 		cmp	byte [rdi + 1], '#'
@@ -230,15 +231,13 @@ printf:
 		bts	r13, 0
 		; Padding: zeroes (r13i bit1=1) or spaces (bit1=0)
 		.argGetPadZeroes:
-		mov	r12, 1
 		cmp	byte [rdi + 1], '0'
-		jb	.noPadding
+		jb	.checkReplArg
 		ja	.padSpaces
 		bts	r13, 1
 		.padSpaces:
 		cmp	byte [rdi + 1], '9'
-		jg	.noPadding
-		xor	r12, r12
+		jg	.checkReplArg
 		xor	rcx, rcx
 		inc	rdi
 		.findPaddingNumLen:
@@ -271,7 +270,10 @@ printf:
 			loop	.getPaddingLoop
 		pop	rax
 		pop	rdi
-		.noPadding:
+		test	r12, r12
+		jnz	.checkReplArg
+		dec	rdi
+		.checkReplArg:
 		cmp	byte [rdi + 1], 'c'
 		je	.rep_c
 		cmp	byte [rdi + 1], 'i'