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/* $Id: symbol.h,v 4.6 2022/10/15 00:03:58 tom Exp $
*
* A symbol table is a collection of string identifiers stored in a
* hash table.
*/
#ifndef SYMBOL_H
#define SYMBOL_H
#include <cproto.h>
typedef struct symbol {
struct symbol *next; /* next symbol in list */
char *name; /* name of symbol */
char *value; /* value of symbol (for defines) */
short flags; /* symbol attributes */
} Symbol;
/* The hash table length should be a prime number. */
#define SYM_MAX_HASH 251
typedef struct symbol_table {
Symbol *bucket[SYM_MAX_HASH]; /* hash buckets */
} SymbolTable;
extern SymbolTable *function_names; /* table of function names */
extern SymbolTable *typedef_names; /* table of typedef names */
extern SymbolTable *define_names; /* table of define names */
extern SymbolTable *type_qualifiers; /* table of type qualifiers */
extern SymbolTable *new_symbol_table /* Create symbol table */
(void);
extern SymbolTable *free_symbol_table /* Destroy symbol table */
(SymbolTable *s);
extern Symbol *find_symbol /* Lookup symbol name */
(SymbolTable *s, const char *n);
extern Symbol *new_symbol /* Define new symbol */
(SymbolTable *s, const char *n, const char *v, int f);
#endif
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