symboltable.h

decafc的源代码

/****************************************************************************
 * File name:	symbolTable.h						    *
 * Description: header file for symbolTable.c				    *
 * Input:	none							    *
 * Output:	none							    *
 * Author:      Luojian Chen                                                *
 * Date:        April 16, 1997					    *
 ****************************************************************************/


#ifndef _SYMBOL_TABLE_H_
#define _SYMBOL_TABLE_H_

#include <stdio.h>
#include <string.h>

#include "decafc.h"

#define SYMBOL_TABLE_SIZE	19

#define EOS		'\0'	/* NULL character */

/* data structure of one element in the symbol table */

typedef struct element {
	String		id;		/* key id */
	int		offset;
	struct element	*typePtr;	/* pointer to the type infomation */
	struct element	*next;		/* pointer to the next symbol with the
					   same hash table index */
} Element;

typedef Element	*ElementPtr;

typedef ElementPtr	HashTableEntry;

typedef HashTableEntry	*HashTable;

/* data structure of the symbol table */

typedef struct symbolTable {
	HashTable	hashTable;		/* hash table pointer */
	int		numberOfEntries;	/* hash table size */
} SymbolTable;

typedef SymbolTable	*SymbolTablePtr;

typedef struct symbolTableStackEntry {
	SymbolTablePtr			symbolTablePtr;
	int				beginLocalVarID;
	struct symbolTableStackEntry	*next;
} SymbolTableStackEntry;

typedef SymbolTableStackEntry	*SymbolTableStackEntryPtr;

typedef struct symbolTableStack {
	SymbolTableStackEntryPtr	top;
} SymbolTableStack;

typedef SymbolTableStack	*SymbolTableStackPtr;

#endif