typedef struct Sym Sym;

#include <u.h>
#include <libc.h>
#include <bio.h>
#include "../2c/2.out.h"
#include "../cc/compat.h"

typedef struct Sym Sym;
typedef struct Ref Ref;
typedef struct Gen Gen;
typedef struct Io Io;
typedef struct Hist Hist;
typedef struct Addr Addr;
typedef struct Gen2 Gen2;

#define MAXALIGN 7
#define FPCHIP 1
#define NSYMB 500
#define BUFSIZ 8192
#define HISTSZ 20
#define NINCLUDE 10
#define NHUNK 10000
#define EOF (-1)
#define IGN (-2)
#define GETC() ((--fi.c < 0)? filbuf(): *fi.p++ & 0xff)
#define NHASH 503
#define STRINGSZ 200
#define NMACRO 10

struct Sym
{
Sym* link;
Ref* ref;
char* macro;
long value;
ushort type;
char *name;
char sym;
};
#define S ((Sym*)0)

struct Ref
{
int class;
};

EXTERN struct
{
char* p;
int c;
} fi;

struct Io
{
Io* link;
char b[BUFSIZ];
char* p;
short c;
short f;
};
#define I ((Io*)0)

EXTERN struct
{
Sym* sym;
short type;
} h[NSYM];

struct Addr
{
Sym* sym;
long offset;
short type;
};
struct Gen
{
Addr;
double dval;
char sval[8];
long displace;
short type;
short field;
};
struct Gen2
{
Gen from;
Gen to;
};

struct Hist
{
Hist* link;
char* name;
long line;
long offset;
};
#define H ((Hist*)0)

enum
{
CLAST,
CMACARG,
CMACRO,
CPREPROC,
};

EXTERN char debug[256];
EXTERN Sym* hash[NHASH];
EXTERN char* Dlist[30];
EXTERN int nDlist;
EXTERN Hist* ehist;
EXTERN int newflag;
EXTERN Hist* hist;
EXTERN char* include[NINCLUDE];
EXTERN Io* iofree;
EXTERN Io* ionext;
EXTERN Io* iostack;
EXTERN long lineno;
EXTERN int nerrors;
EXTERN int ninclude;
EXTERN Gen nullgen;
EXTERN char* outfile;
EXTERN int pass;
EXTERN char* pathname;
EXTERN long pc;
EXTERN int peekc;
EXTERN int sym;
EXTERN char symb[NSYMB];
EXTERN int thechar;
EXTERN char* thestring;
EXTERN Biobuf obuf;

int assemble(char*);
void errorexit(void);
void pushio(void);
void newio(void);
void newfile(char*, int);
Sym* slookup(char*);
Sym* lookup(void);
void syminit(Sym*);
long yylex(void);
int getc(void);
int getnsc(void);
void unget(int);
int escchar(int);
void cinit(void);
void pinit(char*);
void cclean(void);
int isreg(Gen*);
void outcode(int, Gen2*);
void outhist(void);
void zaddr(Gen*, int);
void zname(char*, int, int);
void ieeedtod(Ieee*, double);
int filbuf(void);
Sym* getsym(void);
void domacro(void);
void macund(void);
void macdef(void);
void macexpand(Sym*, char*, int);
void macinc(void);
void macprag(void);
void maclin(void);
void macif(int);
void macend(void);
void dodefine(char*);
void prfile(long);
void linehist(char*, int);
void yyerror(char*, ...);
int yyparse(void);
void setinclude(char*);
int assemble(char*);