/* File buffer size.. increase for better performance */
#define BUFFSIZE 512

/* Max line length in text files */
#define MAXSTRING 128

/* MIDI instrument file */
#define DEF_INSFILE "mod2midi.ins"

/* MOD sample to MIDI instrument map */
#define DEF_MAPFILE "mod2midi.map"

/* Note conversion statements: */
#define ANOTE(x) ((x < 0) ? (-x) : (NoteValue(x)))
#define ENOTE(x,y) ((sam->m > 127) ? (sam->m - 128) : (ANOTE(x) + sam->t[y]))
#define EVOL(x) ((x + sam->a[0]) * sam->a[1] / sam->a[2])

/* Amount of bytes of a sample read in when scanning it */
#define SCANSIZE 3000

/* Make sure these fseek positions are defined */
#ifndef SEEK_SET
#define SEEK_SET 0
#define SEEK_CUR 1
#endif

/* Make sure this macro is defined */
#ifndef min
#define min(x,y) ((x > y) ? y : x)
#endif

typedef char *string;

typedef struct bstruct
{
	FILE *f; // File to read/write to
	unsigned char b[BUFFSIZE]; // Holds buffer data
	unsigned int o, r; // Offset in buffer, Bytes actually read
} bfile[1];

struct bpos
{
	struct bstruct d; // File data
	unsigned long p; // File position
};

typedef struct _X3
{
	char n[23]; // Sample name
	unsigned int l; // Number of ticks in length (4000 per second)
	unsigned char v, m; // Volume of sample, Midi instrument
	signed char c; // Midi channel
	int t[3]; // Transposition amounts
	int a[3]; // Amplification formula: (Vol + a[0]) * a[1] / a[2]
} samp;

typedef struct _X4
{
	unsigned char n; // Number of samples
	samp s[31]; // Sample information
} samps[1];

/* Bit IDs for conversion modes */
#define MODE_MAPSAMPLES 0x0001
#define MODE_SAVEINFO 0x0002
#define MODE_TRANSPOSE 0x0004
#define MODE_VOLUMESHIFT 0x0008
#define MODE_ABOUT 0x0010
#define MODE_CONVERT 0x0020

/* Modes for HandleGadgetMessages() */
#define HM_LISTVIEW 1
#define HM_ENTRY 2

#define GetString( g ) ((( struct StringInfo * )g->SpecialInfo )->Buffer )