compression.yaml added: .LH support, compressed files now take priority

1 files changed, 127 insertions, 0 deletions

diff --git a/src/compression.S b/src/compression.S
new file mode 100644
index 0000000..dfa2894
--- /dev/null
+++ b/src/compression.S
@@ -0,0 +1,127 @@
+.text
+.align 4
+.set sp, 1
+
+#ifndef __MWERKS__
+.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
+.set f1,1;   .set f30,30; .set f31,31
+#endif
+
+.extern StoreCompressionClassList
+
+.extern SZSDecompClass
+.extern LZDecompClass
+.extern LHDecompClass
+.extern LRCDecompClass
+.extern RLDecompClass
+
+.extern DecompBufferPointer
+
+.extern AllocFromGameHeap1
+.extern OSReport
+
+.extern TryAndFindCompressedFile
+.extern DVDConvertPathToEntrynum
+
+.global InitCompression
+InitCompression:
+	stwu sp, -0x10(sp)
+	mflr r0
+	stw r0, 0x14(sp)
+	# -- Prolog
+
+	lis r3, CMsg@h
+	ori r3, r3, CMsg@l
+	crclr 4*cr1+eq
+	bl OSReport
+
+	lis r3, CCCL@h
+	ori r3, r3, CCCL@l
+	lis r4, CCCL_End@h
+	ori r4, r4, CCCL_End@l
+	bl StoreCompressionClassList
+
+	# Allocate a buffer for decompression stuff
+	li r3, 0x8B4
+	bl AllocFromGameHeap1
+	lis r4, DecompBufferPointer@h
+	ori r4, r4, DecompBufferPointer@l
+	stw r3, 0(r4)
+
+	mr r4, r3
+	lis r3, CMsg2@h
+	ori r3, r3, CMsg2@l
+	crclr 4*cr1+eq
+	bl OSReport
+
+	# -- Epilog
+	li r3, 1
+	lwz r0, 0x14(sp)
+	mtlr r0
+	addi sp, sp, 0x10
+	blr
+
+
+.global GetFileEntrynumNew
+GetFileEntrynumNew:
+	stwu sp, -0x20(sp)
+	mflr r0
+	stw r0, 0x24(sp)
+	stw r31, 0x1C(sp)
+	stw r30, 0x18(sp)
+	stw r29, 0x14(sp)
+	# Compression Type pointer (byte*)
+	mr r30, r4
+	# Filename
+	mr r29, r3
+
+	# first, try compression
+	# don't bother checking 5278, it's always on in NSMBW anyway
+	bl TryAndFindCompressedFile
+	cmpwi r3, -1
+	bne returnEntrynum
+
+	# didn't find it, so try the normal version
+	mr r3, r29
+	bl DVDConvertPathToEntrynum
+	# return value gets passed through
+
+	cmpwi r30, 0
+	beq returnEntrynum
+	li r0, 0
+	stb r0, 0(r30)
+
+returnEntrynum:
+	lwz r31, 0x1C(sp)
+	lwz r30, 0x18(sp)
+	lwz r29, 0x14(sp)
+	lwz r0, 0x24(sp)
+	mtlr r0
+	addi sp, sp, 0x20
+	blr
+
+
+.data
+CCCL:
+	.long LHDecompClass
+	.long LZDecompClass
+CCCL_End:
+	.long 0
+
+CMsg:
+	.string "Setting up fancy decompression!\n"
+
+CMsg2:
+	.string "Buffer: %p\n"
+
+.align 4
+
+
+
+