/*
libmodplug v0.8
load_med.cpp
BOOL CSoundFile::ReadMed(const BYTE *lpStream, DWORD dwMemLength)
line 670: memcpy(m_lpszSongComments, lpStream+annotxt, annolen);
千千静听使用的是 libmod 来进行 mod 类文件格式的处理, 此库在 ReadMed 函数中，没有检查
文件描述的长度，如果传递一个恶意构造的值，将导致堆
溢出。
现在采用libmod
软件很多，都应该存在此问题。
*/
/*
author: dummy
e-mail: dummyz@126.com
date: 2008/02/25
*/
#include <windows.h>
#include <stdio.h>
#pragma pack(1)
typedef struct tagMEDMODULEHEADER
{
DWORD id; // MMD1-MMD3
DWORD modlen; // Size of file
DWORD song; // Position in file for this song
WORD psecnum;
WORD pseq;
DWORD blockarr; // Position in file for blocks
DWORD mmdflags;
DWORD smplarr; // Position in file for samples
DWORD reserved;
DWORD expdata; // Absolute offset in file for ExpData (0 if not present)
DWORD reserved2;
WORD pstate;
WORD pblock;
WORD pline;
WORD pseqnum;
WORD actplayline;
BYTE counter;
BYTE extra_songs; // # of songs - 1
} MEDMODULEHEADER;
typedef struct tagMMD0SAMPLE
{
WORD rep, replen;
BYTE midich;
BYTE midipreset;
BYTE svol;
signed char strans;
} MMD0SAMPLE;
// MMD0/MMD1 song header
typedef struct tagMMD0SONGHEADER
{
MMD0SAMPLE sample[63];
WORD numblocks; // # of blocks
WORD songlen; // # of entries used in playseq
BYTE playseq[256]; // Play sequence
WORD deftempo; // BPM tempo
signed char playtransp; // Play transpose
BYTE flags; // 0x10: Hex Volumes | 0x20: ST/NT/PT Slides | 0x40: 8 Channels song
BYTE flags2; // [b4-b0]+1: Tempo LPB, 0x20: tempo mode, 0x80: mix_conv=on
BYTE tempo2; // tempo TPL
BYTE trkvol[16]; // track volumes
BYTE mastervol; // master volume
BYTE numsamples; // # of samples (max=63)
} MMD0SONGHEADER;
typedef struct tagMMD0EXP
{
DWORD nextmod; // File offset of next Hdr
DWORD exp_smp; // Pointer to extra instrument data
WORD s_ext_entries; // Number of extra instrument entries
WORD s_ext_entrsz; // Size of extra instrument data
DWORD annotxt;
DWORD annolen;
DWORD iinfo; // Instrument names
WORD i_ext_entries;
WORD i_ext_entrsz;
DWORD jumpmask;
DWORD rgbtable;
BYTE channelsplit[4]; // Only used if 8ch_conv (extra channel for every nonzero entry)
DWORD n_info;
DWORD songname; // Song name
DWORD songnamelen;
DWORD dumps;
DWORD mmdinfo;
DWORD mmdrexx;
DWORD mmdcmd3x;
DWORD trackinfo_ofs; // ptr to song->numtracks ptrs to tag lists
DWORD effectinfo_ofs; // ptr to group ptrs
DWORD tag_end;
} MMD0EXP;
#pragma pack()
// Byte swapping functions from the GNU C Library and libsdl
/* Swap bytes in 16 bit value. */
#ifdef __GNUC__
# define bswap_16(x) \
(__extension__ \
({ unsigned short int __bsx = (x); \
((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8)); }))
#else
static __inline unsigned short int
bswap_16 (unsigned short int __bsx)
{
return ((((__bsx) >> 8) & 0xff) | (((__bsx) & 0xff) << 8));
}
#endif
/* Swap bytes in 32 bit value. */
#ifdef __GNUC__
# define bswap_32(x) \
(__extension__ \
({ unsigned int __bsx = (x); \
((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) | \
(((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24)); }))
#else
static __inline unsigned int
bswap_32 (unsigned int __bsx)
{
return ((((__bsx) & 0xff000000) >> 24) | (((__bsx) & 0x00ff0000) >> 8) |
(((__bsx) & 0x0000ff00) << 8) | (((__bsx) & 0x000000ff) << 24));
}
#endif
