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#ifndef SYMBOL_H
#define SYMBOL_H
/*
* Basic symbol and namespace definitions.
*
* Copyright (C) 2003 Transmeta Corp.
* 2003 Linus Torvalds
*
* Licensed under the Open Software License version 1.1
*/
#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,
NS_ITERATOR,
};
enum type {
SYM_BASETYPE,
SYM_NODE,
SYM_PTR,
SYM_FN,
SYM_ARRAY,
SYM_STRUCT,
SYM_UNION,
SYM_ENUM,
SYM_TYPEDEF,
SYM_TYPEOF,
SYM_MEMBER,
SYM_BITFIELD,
SYM_LABEL,
};
struct ctype {
unsigned long modifiers;
unsigned long alignment;
unsigned int contextmask, context, as;
struct symbol *base_type;
};
struct symbol_op {
int (*evaluate)(struct expression *);
void (*expand)(struct expression *);
};
struct symbol {
enum namespace namespace:8;
enum type type:8;
struct position pos; /* Where this symbol was declared */
struct ident *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 */
struct symbol *replace; /* What is this symbol shadowed by in copy-expression */
struct scope *scope;
struct symbol *same_symbol;
struct symbol_op *op;
struct /* preprocessor_sym */ {
struct token *expansion;
struct token *arglist;
};
struct /* ctype_sym */ {
unsigned long offset;
unsigned int bit_size;
unsigned int bit_offset:8,
fieldwidth:8,
arg_count:10,
variadic:1,
used:1,
initialized:1;
int array_size;
struct ctype ctype;
struct symbol_list *arguments;
struct statement *stmt;
struct symbol_list *symbol_list;
struct expression *initializer;
long long value; /* Initial value */
};
void *aux; /* Auxiliary info, eg. backend information */
};
/* Modifiers */
#define MOD_AUTO 0x0001
#define MOD_REGISTER 0x0002
#define MOD_STATIC 0x0004
#define MOD_EXTERN 0x0008
#define MOD_STORAGE (MOD_AUTO | MOD_REGISTER | MOD_STATIC | MOD_EXTERN | MOD_INLINE | MOD_TOPLEVEL)
#define MOD_CONST 0x0010
#define MOD_VOLATILE 0x0020
#define MOD_SIGNED 0x0040
#define MOD_UNSIGNED 0x0080
#define MOD_CHAR 0x0100
#define MOD_SHORT 0x0200
#define MOD_LONG 0x0400
#define MOD_LONGLONG 0x0800
#define MOD_TYPEDEF 0x1000
#define MOD_STRUCTOF 0x2000
#define MOD_UNIONOF 0x4000
#define MOD_ENUMOF 0x8000
#define MOD_TYPEOF 0x10000
#define MOD_ATTRIBUTE 0x20000
#define MOD_INLINE 0x40000
#define MOD_ADDRESSABLE 0x80000
#define MOD_NOCAST 0x100000
#define MOD_NODEREF 0x200000
#define MOD_ACCESSED 0x400000
#define MOD_TOPLEVEL 0x800000 // scoping..
#define MOD_LABEL 0x1000000
#define MOD_ASSIGNED 0x2000000
/* Basic types */
extern struct symbol void_type,
int_type,
label_type,
fp_type,
vector_type,
bad_type;
/* C types */
extern struct symbol bool_ctype, void_ctype,
char_ctype, uchar_ctype,
short_ctype, ushort_ctype,
int_ctype, uint_ctype,
long_ctype, ulong_ctype,
llong_ctype, ullong_ctype,
float_ctype, double_ctype, ldouble_ctype,
string_ctype, ptr_ctype, label_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,
defined_ident,
__VA_ARGS___ident,
__LINE___ident,
__FILE___ident,
pragma_ident;
#define symbol_is_typename(sym) ((sym)->type == SYM_TYPE)
extern struct symbol_list *used_list;
extern void access_symbol(struct symbol *);
extern struct symbol *lookup_symbol(struct ident *, enum namespace);
extern void init_symbols(void);
extern struct symbol *alloc_symbol(struct position, 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);
extern struct symbol *examine_symbol_type(struct symbol *);
extern void examine_simple_symbol_type(struct symbol *);
extern const char *show_typename(struct symbol *sym);
extern void debug_symbol(struct symbol *);
extern void merge_type(struct symbol *sym, struct symbol *base_type);
extern void check_declaration(struct symbol *sym);
#endif /* SEMANTIC_H */
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