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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"
#include "target.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 = 0,
NS_MACRO = 1,
NS_TYPEDEF = 2,
NS_STRUCT = 4, // Also used for unions and enums.
NS_LABEL = 8,
NS_SYMBOL = 16,
NS_ITERATOR = 32,
NS_PREPROCESSOR = 64,
NS_UNDEF = 128,
NS_KEYWORD = 256,
};
enum type {
SYM_UNINITIALIZED,
SYM_PREPROCESSOR,
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,
SYM_RESTRICT,
SYM_FOULED,
SYM_KEYWORD,
SYM_BAD,
};
enum keyword {
KW_SPECIFIER = 1 << 0,
KW_MODIFIER = 1 << 1,
KW_QUALIFIER = 1 << 2,
KW_ATTRIBUTE = 1 << 3,
KW_STATEMENT = 1 << 4,
KW_ASM = 1 << 5,
KW_MODE = 1 << 6,
KW_SHORT = 1 << 7,
KW_LONG = 1 << 8,
KW_EXACT = 1 << 9,
};
struct context {
struct expression *context;
unsigned int in, out;
};
extern struct context *alloc_context(void);
DECLARE_PTR_LIST(context_list, struct context);
struct ctype {
unsigned long modifiers;
unsigned long alignment;
struct context_list *contexts;
unsigned int as;
struct symbol *base_type;
};
struct decl_state {
struct ctype ctype;
struct ident **ident;
struct symbol_op *mode;
unsigned char prefer_abstract, is_inline, storage_class, is_tls;
};
struct symbol_op {
enum keyword type;
int (*evaluate)(struct expression *);
int (*expand)(struct expression *, int);
int (*args)(struct expression *);
/* keywords */
struct token *(*declarator)(struct token *token, struct decl_state *ctx);
struct token *(*statement)(struct token *token, struct statement *stmt);
struct token *(*toplevel)(struct token *token, struct symbol_list **list);
struct token *(*attribute)(struct token *token, struct symbol *attr, struct decl_state *ctx);
struct symbol *(*to_mode)(struct symbol *);
int test, set, class;
};
extern int expand_safe_p(struct expression *expr, int cost);
extern int expand_constant_p(struct expression *expr, int cost);
#define SYM_ATTR_WEAK 0
#define SYM_ATTR_NORMAL 1
#define SYM_ATTR_STRONG 2
struct symbol {
enum type type:8;
enum namespace namespace:9;
unsigned char used:1, attr:2, enum_member:1, bound:1;
struct position pos; /* Where this symbol was declared */
struct position endpos; /* Where this symbol ends*/
struct ident *ident; /* What identifier this symbol is associated with */
struct symbol *next_id; /* Next semantic symbol that shares this identifier */
struct symbol *replace; /* What is this symbol shadowed by in copy-expression */
struct scope *scope;
union {
struct symbol *same_symbol;
struct symbol *next_subobject;
};
struct symbol_op *op;
union {
struct /* NS_MACRO */ {
struct token *expansion;
struct token *arglist;
struct scope *used_in;
};
struct /* NS_PREPROCESSOR */ {
int (*handler)(struct stream *, struct token **, struct token *);
int normal;
};
struct /* NS_SYMBOL */ {
unsigned long offset;
int bit_size;
unsigned int bit_offset:8,
arg_count:10,
variadic:1,
initialized:1,
examined:1,
expanding:1,
evaluated:1,
string:1;
struct expression *array_size;
struct ctype ctype;
struct symbol_list *arguments;
struct statement *stmt;
struct symbol_list *symbol_list;
struct statement *inline_stmt;
struct symbol_list *inline_symbol_list;
struct expression *initializer;
struct entrypoint *ep;
long long value; /* Initial value */
struct symbol *definition;
};
};
union /* backend */ {
struct basic_block *bb_target; /* label */
void *aux; /* Auxiliary info, e.g. backend information */
struct { /* sparse ctags */
char kind;
unsigned char visited:1;
};
};
pseudo_t pseudo;
};
/* Modifiers */
#define MOD_AUTO 0x0001
#define MOD_REGISTER 0x0002
#define MOD_STATIC 0x0004
#define MOD_EXTERN 0x0008
#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_LONGLONGLONG 0x1000
#define MOD_TYPEDEF 0x10000
#define MOD_TLS 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_ASSIGNED 0x2000000
#define MOD_TYPE 0x4000000
#define MOD_SAFE 0x8000000 // non-null/non-trapping pointer
#define MOD_USERTYPE 0x10000000
#define MOD_EXPLICITLY_SIGNED 0x40000000
#define MOD_BITWISE 0x80000000
#define MOD_NONLOCAL (MOD_EXTERN | MOD_TOPLEVEL)
#define MOD_STORAGE (MOD_AUTO | MOD_REGISTER | MOD_STATIC | MOD_EXTERN | MOD_INLINE | MOD_TOPLEVEL)
#define MOD_SIGNEDNESS (MOD_SIGNED | MOD_UNSIGNED | MOD_EXPLICITLY_SIGNED)
#define MOD_LONG_ALL (MOD_LONG | MOD_LONGLONG | MOD_LONGLONGLONG)
#define MOD_SPECIFIER (MOD_CHAR | MOD_SHORT | MOD_LONG_ALL | MOD_SIGNEDNESS)
#define MOD_SIZE (MOD_CHAR | MOD_SHORT | MOD_LONG_ALL)
#define MOD_IGNORE (MOD_TOPLEVEL | MOD_STORAGE | MOD_ADDRESSABLE | \
MOD_ASSIGNED | MOD_USERTYPE | MOD_ACCESSED | MOD_EXPLICITLY_SIGNED)
#define MOD_PTRINHERIT (MOD_VOLATILE | MOD_CONST | MOD_NODEREF | MOD_STORAGE)
/* Current parsing/evaluation function */
extern struct symbol *current_fn;
/* Abstract types */
extern struct symbol int_type,
fp_type;
/* C types */
extern struct symbol bool_ctype, void_ctype, type_ctype,
char_ctype, schar_ctype, uchar_ctype,
short_ctype, sshort_ctype, ushort_ctype,
int_ctype, sint_ctype, uint_ctype,
long_ctype, slong_ctype, ulong_ctype,
llong_ctype, sllong_ctype, ullong_ctype,
lllong_ctype, slllong_ctype, ulllong_ctype,
float_ctype, double_ctype, ldouble_ctype,
string_ctype, ptr_ctype, lazy_ptr_ctype,
incomplete_ctype, label_ctype, bad_ctype,
null_ctype;
/* Special internal symbols */
extern struct symbol zero_int;
#define __IDENT(n,str,res) \
extern struct ident n
#include "ident-list.h"
#define symbol_is_typename(sym) ((sym)->type == SYM_TYPE)
extern struct symbol_list *translation_unit_used_list;
extern void access_symbol(struct symbol *);
extern const char * type_difference(struct ctype *c1, struct ctype *c2,
unsigned long mod1, unsigned long mod2);
extern struct symbol *lookup_symbol(struct ident *, enum namespace);
extern struct symbol *create_symbol(int stream, const char *name, int type, int namespace);
extern void init_symbols(void);
extern void init_ctype(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 int show_symbol_expr_init(struct symbol *sym);
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 struct symbol *examine_pointer_target(struct symbol *);
extern void examine_simple_symbol_type(struct symbol *);
extern const char *show_typename(struct symbol *sym);
extern const char *builtin_typename(struct symbol *sym);
extern const char *builtin_ctypename(struct ctype *ctype);
extern const char* get_type_name(enum type type);
extern void debug_symbol(struct symbol *);
extern void merge_type(struct symbol *sym, struct symbol *base_type);
extern void check_declaration(struct symbol *sym);
static inline struct symbol *get_base_type(const struct symbol *sym)
{
return examine_symbol_type(sym->ctype.base_type);
}
static inline int is_int_type(const struct symbol *type)
{
if (type->type == SYM_NODE)
type = type->ctype.base_type;
if (type->type == SYM_ENUM)
type = type->ctype.base_type;
return type->type == SYM_BITFIELD ||
type->ctype.base_type == &int_type;
}
static inline int is_enum_type(const struct symbol *type)
{
if (type->type == SYM_NODE)
type = type->ctype.base_type;
return (type->type == SYM_ENUM);
}
static inline int is_type_type(struct symbol *type)
{
return (type->ctype.modifiers & MOD_TYPE) != 0;
}
static inline int is_ptr_type(struct symbol *type)
{
if (type->type == SYM_NODE)
type = type->ctype.base_type;
return type->type == SYM_PTR || type->type == SYM_ARRAY || type->type == SYM_FN;
}
static inline int is_float_type(struct symbol *type)
{
if (type->type == SYM_NODE)
type = type->ctype.base_type;
return type->ctype.base_type == &fp_type;
}
static inline int is_byte_type(struct symbol *type)
{
return type->bit_size == bits_in_char && type->type != SYM_BITFIELD;
}
static inline int is_void_type(struct symbol *type)
{
if (type->type == SYM_NODE)
type = type->ctype.base_type;
return type == &void_ctype;
}
static inline int is_function(struct symbol *type)
{
return type && type->type == SYM_FN;
}
static inline int is_extern_inline(struct symbol *sym)
{
return (sym->ctype.modifiers & MOD_EXTERN) &&
(sym->ctype.modifiers & MOD_INLINE) &&
is_function(sym->ctype.base_type);
}
static inline int get_sym_type(struct symbol *type)
{
if (type->type == SYM_NODE)
type = type->ctype.base_type;
if (type->type == SYM_ENUM)
type = type->ctype.base_type;
return type->type;
}
static inline struct symbol *lookup_keyword(struct ident *ident, enum namespace ns)
{
if (!ident->keyword)
return NULL;
return lookup_symbol(ident, ns);
}
#define is_restricted_type(type) (get_sym_type(type) == SYM_RESTRICT)
#define is_fouled_type(type) (get_sym_type(type) == SYM_FOULED)
#define is_bitfield_type(type) (get_sym_type(type) == SYM_BITFIELD)
extern int is_ptr_type(struct symbol *);
void create_fouled(struct symbol *type);
struct symbol *befoul(struct symbol *type);
#endif /* SYMBOL_H */