1 /*---------------------------------------------------------------------------*
2 Project: TwlSDK - MI
3 File: mi_stream.c
4
5 Copyright 2003-2008 Nintendo. All rights reserved.
6
7 These coded instructions, statements, and computer programs contain
8 proprietary information of Nintendo of America Inc. and/or Nintendo
9 Company Ltd., and are protected by Federal copyright law. They may
10 not be disclosed to third parties or copied or duplicated in any form,
11 in whole or in part, without the prior written consent of Nintendo.
12
13 $Date:: 2008-09-18#$
14 $Rev: 8573 $
15 $Author: okubata_ryoma $
16 *---------------------------------------------------------------------------*/
17
18 #include <nitro/mi/stream.h>
19 #include <nitro/mi/uncompress.h>
20
21 s32 MIi_InitReadStreamFromMemory(const u8 *srcp, void *destp, const void *paramp);
22 s32 MIi_TerminateReadStreamFromMemory(const u8 *srcp);
23 u8 MIi_ReadByteStreamFromMemory(const u8 *srcp);
24 u16 MIi_ReadShortStreamFromMemory(const u8 *srcp);
25 u32 MIi_ReadWordStreamFromMemory(const u8 *srcp);
26
27
28 static MIReadStreamCallbacks readMemoryStreamCallbacks = {
29 MIi_InitReadStreamFromMemory,
30 MIi_TerminateReadStreamFromMemory,
31 MIi_ReadByteStreamFromMemory,
32 MIi_ReadShortStreamFromMemory,
33 MIi_ReadWordStreamFromMemory,
34 };
35
MI_GetReadStreamFromMemoryCallbacks(void)36 MIReadStreamCallbacks *MI_GetReadStreamFromMemoryCallbacks(void)
37 {
38 return &readMemoryStreamCallbacks;
39 }
40
MIi_InitReadStreamFromMemory(const u8 * srcp,void * destp,const void * paramp)41 s32 MIi_InitReadStreamFromMemory(const u8 *srcp, void *destp, const void *paramp)
42 {
43 #pragma unused(destp)
44 s32 retval = 0;
45
46 if (paramp)
47 {
48 retval = (s32)MIi_ReadWordStreamFromMemory(srcp);
49
50 if (((retval & MI_COMPRESSION_TYPE_EX_MASK) != MI_COMPRESSION_LZ)
51 && ((retval & MI_COMPRESSION_TYPE_EX_MASK) != MI_COMPRESSION_RL)
52 && ((retval & MI_COMPRESSION_TYPE_MASK) != MI_COMPRESSION_HUFFMAN))
53 return -1;
54 }
55
56 return retval;
57 }
58
MIi_TerminateReadStreamFromMemory(const u8 * srcp)59 s32 MIi_TerminateReadStreamFromMemory(const u8 *srcp)
60 {
61 #pragma unused(srcp)
62 return 0;
63 }
64
MIi_ReadByteStreamFromMemory(const u8 * srcp)65 u8 MIi_ReadByteStreamFromMemory(const u8 *srcp)
66 {
67 return *srcp;
68 }
69
MIi_ReadShortStreamFromMemory(const u8 * srcp)70 u16 MIi_ReadShortStreamFromMemory(const u8 *srcp)
71 {
72 return *(u16 *)srcp;
73 }
74
MIi_ReadWordStreamFromMemory(const u8 * srcp)75 u32 MIi_ReadWordStreamFromMemory(const u8 *srcp)
76 {
77 return *(u32 *)srcp;
78 }
79