table.h

/*
 * table.h -- symbol table
 */

#ifndef _TABLE_H_
#define _TABLE_H_

#define ENTRY_KIND_TYPE		0
#define ENTRY_KIND_VAR		1
#define ENTRY_KIND_PROC		2

typedef struct {
	int kind;
	union {
		struct {
			Type *type;
		} typeEntry;
		struct {
			Type *type;
			boolean isRef;
			int offset;
		} varEntry;
		struct {
			ParamTypes *paramTypes;
			int paramSize; 		/* eingehende Argumente */
			int argSize;		/* ausgehende Argumente */
			int localVarSize;	/* lokale Variable */
			struct table *localTable;
		} procEntry;
	} u;
} Entry;

typedef struct bintree {
	Sym *sym;
	unsigned key;
	Entry *entry;
	struct bintree *left;
	struct bintree *right;
} Bintree;

typedef struct table {
	Bintree *bintree;
	struct table *upperLevel;
} Table;

Entry *newTypeEntry(Type * type);
Entry *newVarEntry(Type * type, boolean isRef);
Entry *newProcEntry(ParamTypes * paramTypes, Table * localTable);

Table *newTable(Table * upperLevel);
Entry *enter(Table * table, Sym * sym, Entry * entry);
Entry *lookup(Table * table, Sym * sym);

void showEntry(Entry * entry);
void showTable(Table * table);

#endif				/* _TABLE_H_ */