1 files changed, 119 insertions, 0 deletions
diff --git a/arm9/asm/MSL_Common_buffer_io.s b/arm9/asm/MSL_Common_buffer_io.s
new file mode 100644
index 00000000..940daf6d
--- /dev/null
+++ b/arm9/asm/MSL_Common_buffer_io.s
@@ -0,0 +1,119 @@
+    .include "asm/macros.inc"
+    .include "global.inc"
+
+    .text
+
+	arm_func_start __convert_from_newlines
+__convert_from_newlines:
+	bx lr
+	arm_func_end __convert_from_newlines
+
+	arm_func_start __convert_to_newlines
+__convert_to_newlines:
+	bx lr
+	arm_func_end __convert_to_newlines
+
+	arm_func_start __prep_buffer
+__prep_buffer:
+	ldr r1, [r0, #0x1c]
+	str r1, [r0, #0x24]
+	ldr r3, [r0, #0x20]
+	str r3, [r0, #0x28]
+	ldr r2, [r0, #0x18]
+	ldr r1, [r0, #0x2c]
+	and r1, r2, r1
+	sub r1, r3, r1
+	str r1, [r0, #0x28]
+	ldr r1, [r0, #0x18]
+	str r1, [r0, #0x34]
+	bx lr
+	arm_func_end __prep_buffer
+
+	arm_func_start __load_buffer
+__load_buffer:
+	stmdb sp!, {r4-r6,lr}
+	mov r5, r2
+	mov r4, r0
+	mov r6, r1
+	bl __prep_buffer
+	cmp r5, #0x1
+	ldreq r0, [r4, #0x20]
+	add r2, r4, #0x28
+	streq r0, [r4, #0x28]
+	ldr r0, [r4, #0x0]
+	ldr r1, [r4, #0x1c]
+	ldr r3, [r4, #0x48]
+	ldr r12, [r4, #0x3c]
+	blx r12
+	cmp r0, #0x2
+	moveq r1, #0x0
+	streq r1, [r4, #0x28]
+	cmp r6, #0x0
+	ldrne r1, [r4, #0x28]
+	strne r1, [r6, #0x0]
+	cmp r0, #0x0
+	ldmneia sp!, {r4-r6,pc}
+	ldr r1, [r4, #0x18]
+	ldr r0, [r4, #0x28]
+	add r0, r1, r0
+	str r0, [r4, #0x18]
+	ldr r0, [r4, #0x4]
+	mov r0, r0, lsl #0x13
+	movs r0, r0, lsr #0x1f
+	bne _020DE4F4
+	ldr r0, [r4, #0x1c]
+	add r1, r4, #0x28
+	bl __convert_to_newlines
+_020DE4F4:
+	mov r0, #0x0
+	ldmia sp!, {r4-r6,pc}
+	arm_func_end __load_buffer
+
+	arm_func_start __flush_buffer
+__flush_buffer:
+	stmdb sp!, {r3-r5,lr}
+	mov r5, r0
+	ldr r2, [r5, #0x24]
+	ldr r0, [r5, #0x1c]
+	mov r4, r1
+	subs r0, r2, r0
+	beq _020DE574
+	str r0, [r5, #0x28]
+	ldr r0, [r5, #0x4]
+	mov r0, r0, lsl #0x13
+	movs r0, r0, lsr #0x1f
+	bne _020DE538
+	ldr r0, [r5, #0x1c]
+	add r1, r5, #0x28
+	bl __convert_from_newlines
+_020DE538:
+	ldr r0, [r5, #0x0]
+	ldr r1, [r5, #0x1c]
+	ldr r3, [r5, #0x48]
+	ldr r12, [r5, #0x40]
+	add r2, r5, #0x28
+	blx r12
+	cmp r4, #0x0
+	ldrne r1, [r5, #0x28]
+	strne r1, [r4, #0x0]
+	cmp r0, #0x0
+	ldmneia sp!, {r3-r5,pc}
+	ldr r1, [r5, #0x18]
+	ldr r0, [r5, #0x28]
+	add r0, r1, r0
+	str r0, [r5, #0x18]
+_020DE574:
+	mov r0, r5
+	bl __prep_buffer
+	mov r0, #0x0
+	ldmia sp!, {r3-r5,pc}
+	arm_func_end __flush_buffer
+
+    .section .exceptix,4
+
+	.word __load_buffer
+	.short 141
+	.word 0x00200700
+	.word __flush_buffer
+	.short 137
+	.word 0x00200300