.extern LayoutHelper_Link

#ifndef __MWERKS__
.extern _Z8LoadFileP10FileHandlePc
.extern _Z8FreeFileP10FileHandle
#define LoadFileFunc _Z8LoadFileP10FileHandlePc
#define FreeFileFunc _Z8FreeFileP10FileHandle
.set r0,0;   .set r1,1;   .set r2,2; .set r3,3;   .set r4,4
.set r5,5;   .set r6,6;   .set r7,7;   .set r8,8;   .set r9,9
.set r10,10; .set r11,11; .set r12,12; .set r13,13; .set r14,14
.set r15,15; .set r16,16; .set r17,17; .set r18,18; .set r19,19
.set r20,20; .set r21,21; .set r22,22; .set r23,23; .set r24,24
.set r25,25; .set r26,26; .set r27,27; .set r28,28; .set r29,29
.set r30,30; .set r31,31; .set f0,0; .set f2,2; .set f3,3
#else
.extern LoadFile__FP10FileHandlePCc
.extern FreeFile__FP10FileHandle
#define LoadFileFunc LoadFile__FP10FileHandlePCc
#define FreeFileFunc FreeFile__FP10FileHandle
#endif

.text

.set sp,1
.set rtoc,2
.set this,31




.global EmbeddedLayout_LoadArc
EmbeddedLayout_LoadArc:
	# stack setup
	stwu sp, -0x20(sp)
	mflr r0
	stw r0, 0x24(sp)
	stw r31, 0x1C(sp)
	stw r30, 0x18(sp)

	# r31 is a pointer to the LayoutHelper (must be converted)
	# r30 stores the filename
	addi r31, r3, 0xAC
	mr r30, r4

	# check to see if an arc has already been loaded
	lwz r0, 0xBC(r3)
	cmpwi r0, 0
	bne return_0

	# ok, no
	# create a FileHandle where a NSMBWFile would be
	# don't know if this will work but it's worth a try
	addi r3, r31, 0xC0
	mr r4, r30
	bl LoadFileFunc

	# check retval
	cmpwi r3, 0
	stw r3, 0xBC(r31)
	beq return_0

	# link it
	mr r4, r3
	mr r3, r31
	lis r5, arcString@h
	ori r5, r5, arcString@l
	bl LayoutHelper_Link

	# now add a pointer to the LayoutHelper into the Layout at offset 0x84
	# turn r3 into an EmbeddedLayout pointer
	subi r3, r31, 0xAC
	stw r31, 0x84(r3)

	b return_1

return_0:
	li r3, 0
	b return

return_1:
	li r3, 1

return:
	lwz r30, 0x18(sp)
	lwz r31, 0x1C(sp)
	lwz r0, 0x24(sp)
	mtlr r0
	addi sp, sp, 0x20
	blr

.align 4

.global EmbeddedLayout_FreeArc
EmbeddedLayout_FreeArc:
	# stack setup
	stwu sp, -0x10(sp)
	mflr r0
	stw r0, 0x14(sp)
	stw r31, 0xC(sp)

	# r31 is a pointer to the LayoutHelper (must be converted)
	addi r31, r3, 0xAC

	# - if an arc has been loaded, then free the NSMBWFile
	lwz r0, 0xBC(r3)
	cmpwi r0, 0
	beq xreturn_1

	# no, so free it
	addi r3, r31, 0xC0
	bl FreeFileFunc

	li r3, 0
	stw r3, 0xBC(r31)

xreturn_1:
	li r3, 1
	lwz r31, 0xC(sp)
	lwz r0, 0x14(sp)
	mtlr r0
	addi sp, sp, 0x10
	blr



.data
arcString:
	.string "arc"

.align 4