c.h

quakeIII源码这个不用我多说吧

			int size;
			long *values;
			Symbol *labels;
		} swtch;

	} u;
};
struct swtch {
	Symbol sym;
	int lab;
	Symbol deflab;
	int ncases;
	int size;
	long *values;
	Symbol *labels;
};
struct symbol {
	char *name;
	int scope;
	Coordinate src;
	Symbol up;
	List uses;
	int sclass;
	unsigned structarg:1;

	unsigned addressed:1;
	unsigned computed:1;
	unsigned temporary:1;
	unsigned generated:1;
	unsigned defined:1;
	Type type;
	float ref;
	union {
		struct {
			int label;
			Symbol equatedto;
		} l;
		struct {
			unsigned cfields:1;
			unsigned vfields:1;
			Table ftab;		/* omit */
			Field flist;
		} s;
		int value;
		Symbol *idlist;
		struct {
			Value min, max;
		} limits;
		struct {
			Value v;
			Symbol loc;
		} c;
		struct {
			Coordinate pt;
			int label;
			int ncalls;
			Symbol *callee;
		} f;
		int seg;
		Symbol alias;
		struct {
			Node cse;
			int replace;
			Symbol next;
		} t;
	} u;
	Xsymbol x;
};
enum { CONSTANTS=1, LABELS, GLOBAL, PARAM, LOCAL };
struct tree {
	int op;
	Type type;
	Tree kids[2];
	Node node;
	union {
		Value v;
		Symbol sym;

		Field field;
	} u;
};
enum {
	AND=38<<4,
	NOT=39<<4,
	OR=40<<4,
	COND=41<<4,
	RIGHT=42<<4,
	FIELD=43<<4
};
struct type {
	int op;
	Type type;
	int align;
	int size;
	union {
		Symbol sym;
		struct {
			unsigned oldstyle:1;
			Type *proto;
		} f;
	} u;
	Xtype x;
};
struct field {
	char *name;
	Type type;
	int offset;
	short bitsize;
	short lsb;
	Field link;
};
extern int assignargs;
extern int prunetemps;
extern int nodecount;
extern Symbol cfunc;
extern Symbol retv;
extern Tree (*optree[])(int, Tree, Tree);

extern char kind[];
extern int errcnt;
extern int errlimit;
extern int wflag;
extern Events events;
extern float refinc;

extern unsigned char *cp;
extern unsigned char *limit;
extern char *firstfile;
extern char *file;
extern char *line;
extern int lineno;
extern int t;
extern char *token;
extern Symbol tsym;
extern Coordinate src;
extern int Aflag;
extern int Pflag;
extern Symbol YYnull;
extern Symbol YYcheck;
extern int glevel;
extern int xref;

extern int ncalled;
extern int npoints;

extern int needconst;
extern int explicitCast;
extern struct code codehead;
extern Code codelist;
extern Table stmtlabs;
extern float density;
extern Table constants;
extern Table externals;
extern Table globals;
extern Table identifiers;
extern Table labels;
extern Table types;
extern int level;

extern List loci, symbols;

extern List symbols;

extern int where;
extern Type chartype;
extern Type doubletype;
extern Type floattype;
extern Type inttype;
extern Type longdouble;
extern Type longtype;
extern Type longlong;
extern Type shorttype;
extern Type signedchar;
extern Type unsignedchar;
extern Type unsignedlonglong;
extern Type unsignedlong;
extern Type unsignedshort;
extern Type unsignedtype;
extern Type charptype;
extern Type funcptype;
extern Type voidptype;
extern Type voidtype;
extern Type unsignedptr;
extern Type signedptr;
extern Type widechar;
extern void  *allocate(unsigned long n, unsigned a);
extern void deallocate(unsigned a);
extern void *newarray(unsigned long m, unsigned long n, unsigned a);
extern void walk(Tree e, int tlab, int flab);
extern Node listnodes(Tree e, int tlab, int flab);
extern Node newnode(int op, Node left, Node right, Symbol p);
extern Tree cvtconst(Tree);
extern void printdag(Node, int);
extern void compound(int, Swtch, int);
extern void defglobal(Symbol, int);
extern void finalize(void);
extern void program(void);

extern Tree vcall(Symbol func, Type ty, ...);
extern Tree addrof(Tree);
extern Tree asgn(Symbol, Tree);
extern Tree asgntree(int, Tree, Tree);
extern Type assign(Type, Tree);
extern Tree bittree(int, Tree, Tree);
extern Tree call(Tree, Type, Coordinate);
extern Tree calltree(Tree, Type, Tree, Symbol);
extern Tree condtree(Tree, Tree, Tree);
extern Tree cnsttree(Type, ...);
extern Tree consttree(unsigned int, Type);
extern Tree eqtree(int, Tree, Tree);
extern int iscallb(Tree);
extern Tree shtree(int, Tree, Tree);
extern void typeerror(int, Tree, Tree);

extern void test(int tok, char set[]);
extern void expect(int tok);
extern void skipto(int tok, char set[]);
extern void error(const char *, ...);
extern int fatal(const char *, const char *, int);
extern void warning(const char *, ...);

typedef void (*Apply)(void *, void *, void *);
extern void attach(Apply, void *, List *);
extern void apply(List event, void *arg1, void *arg2);
extern Tree retype(Tree p, Type ty);
extern Tree rightkid(Tree p);
extern int hascall(Tree p);
extern Type binary(Type, Type);
extern Tree cast(Tree, Type);
extern Tree cond(Tree);
extern Tree expr0(int);
extern Tree expr(int);
extern Tree expr1(int);
extern Tree field(Tree, const char *);
extern char *funcname(Tree);
extern Tree idtree(Symbol);
extern Tree incr(int, Tree, Tree);
extern Tree lvalue(Tree);
extern Tree nullcall(Type, Symbol, Tree, Tree);
extern Tree pointer(Tree);
extern Tree rvalue(Tree);
extern Tree value(Tree);

extern void defpointer(Symbol);
extern Type initializer(Type, int);
extern void swtoseg(int);

extern void input_init(int, char *[]);
extern void fillbuf(void);
extern void nextline(void);

extern int getchr(void);
extern int gettok(void);

extern void emitcode(void);
extern void gencode (Symbol[], Symbol[]);
extern void fprint(FILE *f, const char *fmt, ...);
extern char *stringf(const char *, ...);
extern void check(Node);
extern void print(const char *, ...);

extern List append(void *x, List list);
extern int  length(List list);
extern void *ltov (List *list, unsigned a);
extern void init(int, char *[]);

extern Type typename(void);
extern void checklab(Symbol p, void *cl);
extern Type enumdcl(void);
extern void main_init(int, char *[]);
extern int main(int, char *[]);

extern void vfprint(FILE *, char *, const char *, va_list);

extern int process(char *);
extern int findfunc(char *, char *);
extern int findcount(char *, int, int);

extern Tree constexpr(int);
extern int intexpr(int, int);
extern Tree simplify(int, Type, Tree, Tree);
extern int ispow2(unsigned long u);

extern int reachable(int);

extern void addlocal(Symbol);
extern void branch(int);
extern Code code(int);
extern void definelab(int);
extern void definept(Coordinate *);
extern void equatelab(Symbol, Symbol);
extern Node jump(int);
extern void retcode(Tree);
extern void statement(int, Swtch, int);
extern void swcode(Swtch, int *, int, int);
extern void swgen(Swtch);

extern char * string(const char *str);
extern char *stringn(const char *str, int len);
extern char *stringd(long n);
extern Symbol relocate(const char *name, Table src, Table dst);
extern void use(Symbol p, Coordinate src);
extern void locus(Table tp, Coordinate *cp);
extern Symbol allsymbols(Table);

extern Symbol constant(Type, Value);
extern void enterscope(void);
extern void exitscope(void);
extern Symbol findlabel(int);
extern Symbol findtype(Type);
extern void foreach(Table, int, void (*)(Symbol, void *), void *);
extern Symbol genident(int, Type, int);
extern int genlabel(int);
extern Symbol install(const char *, Table *, int, int);
extern Symbol intconst(int);
extern Symbol lookup(const char *, Table);
extern Symbol mkstr(char *);
extern Symbol mksymbol(int, const char *, Type);
extern Symbol newtemp(int, int, int);
extern Table table(Table, int);
extern Symbol temporary(int, Type);
extern char *vtoa(Type, Value);

extern int nodeid(Tree);
extern char *opname(int);
extern int *printed(int);
extern void printtree(Tree, int);
extern Tree root(Tree);
extern Tree texpr(Tree (*)(int), int, int);
extern Tree tree(int, Type, Tree, Tree);

extern void type_init(int, char *[]);

extern Type signedint(Type);

extern int hasproto(Type);
extern void outtype(Type, FILE *);
extern void printdecl (Symbol p, Type ty);
extern void printproto(Symbol p, Symbol args[]);
extern char *typestring(Type ty, char *id);
extern Field fieldref(const char *name, Type ty);
extern Type array(Type, int, int);
extern Type atop(Type);
extern Type btot(int, int);
extern Type compose(Type, Type);
extern Type deref(Type);
extern int eqtype(Type, Type, int);
extern Field fieldlist(Type);
extern Type freturn(Type);
extern Type ftype(Type, Type);
extern Type func(Type, Type *, int);
extern Field newfield(char *, Type, Type);
extern Type newstruct(int, char *);
extern void printtype(Type, int);
extern Type promote(Type);
extern Type ptr(Type);
extern Type qual(int, Type);
extern void rmtypes(int);
extern int ttob(Type);
extern int variadic(Type);