#define ON_ERROR(a, b)   \
	if(a) {	         \
		goto b;  \
	}

typedef struct
{
 char Name[30];
 int Offset;
 int Length;
 int End;
 int Volume;
 int Repeat; /* offset */
 int RepeatLength;
 int Mode;	  	      //looping, data width
 int Finetune;
 int RelNote;
 int Panning;
}SAMPINFO;

// Raw S3M header struct:

typedef struct {
	char  songname[28];
	char  t1a;
	char  type;
	char  unused1[2];
	unsigned short int ordnum;
	unsigned short int insnum;
	unsigned short int patnum;
	unsigned short int flags;
	unsigned short int tracker;
	unsigned short int fileformat;
	char  scrm[4];
	unsigned char mastervol;
	unsigned char initspeed;
	unsigned char inittempo;
	unsigned char mastermult;
	char  unused2;
	unsigned char defaultpan;	//only scrm 3.2
	char  unused3[10];
	unsigned char channels[32];
} S3MHEADER;

// Raw S3M instrument header struct:

typedef struct {
	unsigned char type;
	char  filename[12];
	unsigned char memsegh;
	unsigned short int memsegl;
	ULONG length;
	ULONG loopbeg;
	ULONG loopend;
	unsigned char volume;
	unsigned char dsk;
	unsigned char pack;
	unsigned char flags;
	ULONG c2spd;
	char  unused[12];
	char  sampname[28];
	char  scrs[4];
} SCREAMSAMPLE;