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#ifndef SEMANTIC_H
#define SEMANTIC_H
/*
* Basic symbol and namespace definitions.
*
* Copyright (C) 2003 Linus Torvalds, all rights reserved.
*/
#include "token.h"
/*
* An identifier with semantic meaning is a "symbol".
*
* There's a 1:n relationship: each symbol is always
* associated with one identifier, while each identifier
* can have one or more semantic meanings due to C scope
* rules.
*
* The progression is symbol -> token -> identifier. The
* token contains the information on where the symbol was
* declared.
*/
enum namespace {
NS_NONE,
NS_PREPROCESSOR,
NS_TYPEDEF,
NS_STRUCT,
NS_ENUM,
NS_LABEL,
NS_SYMBOL,
};
enum type {
SYM_NONE,
SYM_TYPE,
SYM_PTR,
SYM_FN,
SYM_ARRAY,
SYM_STRUCT,
SYM_UNION,
SYM_ENUM,
SYM_TYPEDEF,
SYM_MEMBER,
SYM_BITFIELD,
};
struct ctype {
unsigned long modifiers;
struct symbol *base_type;
};
struct symbol {
enum namespace namespace:8;
enum type type:8;
struct token *token; /* Where this symbol was declared */
struct token *ident; /* What identifier this symbol is associated with */
struct symbol *next_id; /* Next semantic symbol that shares this identifier */
struct symbol **id_list; /* Backpointer to symbol list head */
union {
struct preprocessor_sym {
int busy;
struct token *expansion;
struct token *arglist;
};
struct ctype_symbol {
struct symbol *next; /* Next symbol at this level */
unsigned long size;
struct ctype ctype;
struct symbol_list *arguments;
struct statement *stmt;
struct symbol_list *symbol_list;
};
};
};
/* Modifiers */
#define SYM_AUTO 0x0001
#define SYM_REGISTER 0x0002
#define SYM_STATIC 0x0004
#define SYM_EXTERN 0x0008
#define SYM_CONST 0x0010
#define SYM_VOLATILE 0x0020
#define SYM_SIGNED 0x0040
#define SYM_UNSIGNED 0x0080
#define SYM_CHAR 0x0100
#define SYM_SHORT 0x0200
#define SYM_LONG 0x0400
#define SYM_LONGLONG 0x0800
#define SYM_TYPEDEF 0x1000
#define SYM_STRUCTOF 0x2000
#define SYM_UNIONOF 0x4000
#define SYM_ENUMOF 0x8000
#define SYM_TYPEOF 0x10000
#define SYM_ATTRIBUTE 0x20000
/* Basic types */
extern struct symbol void_type,
int_type,
fp_type,
vector_type,
bad_type;
/* Basic identifiers */
extern struct ident sizeof_ident,
alignof_ident,
__alignof_ident,
__alignof___ident,
if_ident,
else_ident,
switch_ident,
case_ident,
default_ident,
break_ident,
continue_ident,
for_ident,
while_ident,
do_ident,
goto_ident,
return_ident;
extern struct ident __asm___ident,
__asm_ident,
asm_ident,
__volatile___ident,
__volatile_ident,
volatile_ident,
__attribute___ident,
__attribute_ident;
#define symbol_is_typename(sym) ((sym)->type == SYM_TYPE)
extern struct symbol *lookup_symbol(struct ident *, enum namespace);
extern void init_symbols(void);
extern struct symbol *alloc_symbol(struct token *, int type);
extern void show_type(struct symbol *);
extern const char *modifier_string(unsigned long mod);
extern void show_symbol(struct symbol *);
extern void show_type_list(struct symbol *);
extern void show_symbol_list(struct symbol_list *, const char *);
extern void add_symbol(struct symbol_list **, struct symbol *);
extern void bind_symbol(struct symbol *, struct ident *, enum namespace);
#endif /* SEMANTIC_H */
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