4 * Basic symbol and namespace definitions.
6 * Copyright (C) 2003 Transmeta Corp.
9 * Permission is hereby granted, free of charge, to any person obtaining a copy
10 * of this software and associated documentation files (the "Software"), to deal
11 * in the Software without restriction, including without limitation the rights
12 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
13 * copies of the Software, and to permit persons to whom the Software is
14 * furnished to do so, subject to the following conditions:
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
22 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
23 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
32 * An identifier with semantic meaning is a "symbol".
34 * There's a 1:n relationship: each symbol is always
35 * associated with one identifier, while each identifier
36 * can have one or more semantic meanings due to C scope
39 * The progression is symbol -> token -> identifier. The
40 * token contains the information on where the symbol was
47 NS_STRUCT
= 4, // Also used for unions and enums.
79 KW_SPECIFIER
= 1 << 0,
81 KW_QUALIFIER
= 1 << 2,
82 KW_ATTRIBUTE
= 1 << 3,
83 KW_STATEMENT
= 1 << 4,
92 struct expression
*context
;
96 extern struct context
*alloc_context(void);
98 DECLARE_PTR_LIST(context_list
, struct context
);
101 unsigned long modifiers
;
102 unsigned long alignment
;
103 struct context_list
*contexts
;
105 struct symbol
*base_type
;
110 struct ident
**ident
;
111 struct symbol_op
*mode
;
112 unsigned char prefer_abstract
, is_inline
, storage_class
, is_tls
;
117 int (*evaluate
)(struct expression
*);
118 int (*expand
)(struct expression
*, int);
119 int (*args
)(struct expression
*);
122 struct token
*(*declarator
)(struct token
*token
, struct decl_state
*ctx
);
123 struct token
*(*statement
)(struct token
*token
, struct statement
*stmt
);
124 struct token
*(*toplevel
)(struct token
*token
, struct symbol_list
**list
);
125 struct token
*(*attribute
)(struct token
*token
, struct symbol
*attr
, struct decl_state
*ctx
);
126 struct symbol
*(*to_mode
)(struct symbol
*);
128 int test
, set
, class;
131 extern int expand_safe_p(struct expression
*expr
, int cost
);
132 extern int expand_constant_p(struct expression
*expr
, int cost
);
134 #define SYM_ATTR_WEAK 0
135 #define SYM_ATTR_NORMAL 1
136 #define SYM_ATTR_STRONG 2
140 enum namespace namespace:9;
141 unsigned char used
:1, attr
:2, enum_member
:1, bound
:1;
142 struct position pos
; /* Where this symbol was declared */
143 struct position endpos
; /* Where this symbol ends*/
144 struct ident
*ident
; /* What identifier this symbol is associated with */
145 struct symbol
*next_id
; /* Next semantic symbol that shares this identifier */
146 struct symbol
*replace
; /* What is this symbol shadowed by in copy-expression */
149 struct symbol
*same_symbol
;
150 struct symbol
*next_subobject
;
153 struct symbol_op
*op
;
156 struct /* NS_MACRO */ {
157 struct token
*expansion
;
158 struct token
*arglist
;
159 struct scope
*used_in
;
161 struct /* NS_PREPROCESSOR */ {
162 int (*handler
)(struct stream
*, struct token
**, struct token
*);
165 struct /* NS_SYMBOL */ {
166 unsigned long offset
;
168 unsigned int bit_offset
:8,
179 struct expression
*array_size
;
181 struct symbol_list
*arguments
;
182 struct statement
*stmt
;
183 struct symbol_list
*symbol_list
;
184 struct statement
*inline_stmt
;
185 struct symbol_list
*inline_symbol_list
;
186 struct expression
*initializer
;
187 struct entrypoint
*ep
;
188 long long value
; /* Initial value */
189 struct symbol
*definition
;
192 union /* backend */ {
193 struct basic_block
*bb_target
; /* label */
194 void *aux
; /* Auxiliary info, e.g. backend information */
195 struct { /* sparse ctags */
197 unsigned char visited
:1;
204 #define MOD_AUTO 0x0001
205 #define MOD_REGISTER 0x0002
206 #define MOD_STATIC 0x0004
207 #define MOD_EXTERN 0x0008
209 #define MOD_CONST 0x0010
210 #define MOD_VOLATILE 0x0020
211 #define MOD_SIGNED 0x0040
212 #define MOD_UNSIGNED 0x0080
214 #define MOD_CHAR 0x0100
215 #define MOD_SHORT 0x0200
216 #define MOD_LONG 0x0400
217 #define MOD_LONGLONG 0x0800
218 #define MOD_LONGLONGLONG 0x1000
219 #define MOD_PURE 0x2000
221 #define MOD_TYPEDEF 0x10000
223 #define MOD_TLS 0x20000
224 #define MOD_INLINE 0x40000
225 #define MOD_ADDRESSABLE 0x80000
227 #define MOD_NOCAST 0x100000
228 #define MOD_NODEREF 0x200000
229 #define MOD_ACCESSED 0x400000
230 #define MOD_TOPLEVEL 0x800000 // scoping..
232 #define MOD_ASSIGNED 0x2000000
233 #define MOD_TYPE 0x4000000
234 #define MOD_SAFE 0x8000000 // non-null/non-trapping pointer
236 #define MOD_USERTYPE 0x10000000
237 #define MOD_NORETURN 0x20000000
238 #define MOD_EXPLICITLY_SIGNED 0x40000000
239 #define MOD_BITWISE 0x80000000
242 #define MOD_NONLOCAL (MOD_EXTERN | MOD_TOPLEVEL)
243 #define MOD_STORAGE (MOD_AUTO | MOD_REGISTER | MOD_STATIC | MOD_EXTERN | MOD_INLINE | MOD_TOPLEVEL)
244 #define MOD_SIGNEDNESS (MOD_SIGNED | MOD_UNSIGNED | MOD_EXPLICITLY_SIGNED)
245 #define MOD_LONG_ALL (MOD_LONG | MOD_LONGLONG | MOD_LONGLONGLONG)
246 #define MOD_SPECIFIER (MOD_CHAR | MOD_SHORT | MOD_LONG_ALL | MOD_SIGNEDNESS)
247 #define MOD_SIZE (MOD_CHAR | MOD_SHORT | MOD_LONG_ALL)
248 #define MOD_IGNORE (MOD_TOPLEVEL | MOD_STORAGE | MOD_ADDRESSABLE | \
249 MOD_ASSIGNED | MOD_USERTYPE | MOD_ACCESSED | MOD_EXPLICITLY_SIGNED)
250 #define MOD_PTRINHERIT (MOD_VOLATILE | MOD_CONST | MOD_NODEREF | MOD_STORAGE | MOD_NORETURN | MOD_NOCAST)
253 /* Current parsing/evaluation function */
254 extern struct symbol
*current_fn
;
257 extern struct symbol int_type
,
261 extern struct symbol bool_ctype
, void_ctype
, type_ctype
,
262 char_ctype
, schar_ctype
, uchar_ctype
,
263 short_ctype
, sshort_ctype
, ushort_ctype
,
264 int_ctype
, sint_ctype
, uint_ctype
,
265 long_ctype
, slong_ctype
, ulong_ctype
,
266 llong_ctype
, sllong_ctype
, ullong_ctype
,
267 lllong_ctype
, slllong_ctype
, ulllong_ctype
,
268 float_ctype
, double_ctype
, ldouble_ctype
,
269 string_ctype
, ptr_ctype
, lazy_ptr_ctype
,
270 incomplete_ctype
, label_ctype
, bad_ctype
,
273 /* Special internal symbols */
274 extern struct symbol zero_int
;
276 #define __IDENT(n,str,res) \
277 extern struct ident n
278 #include "ident-list.h"
280 #define symbol_is_typename(sym) ((sym)->type == SYM_TYPE)
282 extern struct symbol_list
*translation_unit_used_list
;
284 extern void access_symbol(struct symbol
*);
286 extern const char * type_difference(struct ctype
*c1
, struct ctype
*c2
,
287 unsigned long mod1
, unsigned long mod2
);
289 extern struct symbol
*lookup_symbol(struct ident
*, enum namespace);
290 extern struct symbol
*create_symbol(int stream
, const char *name
, int type
, int namespace);
291 extern void init_symbols(void);
292 extern void init_ctype(void);
293 extern struct symbol
*alloc_symbol(struct position
, int type
);
294 extern void show_type(struct symbol
*);
295 extern const char *modifier_string(unsigned long mod
);
296 extern void show_symbol(struct symbol
*);
297 extern int show_symbol_expr_init(struct symbol
*sym
);
298 extern void show_type_list(struct symbol
*);
299 extern void show_symbol_list(struct symbol_list
*, const char *);
300 extern void add_symbol(struct symbol_list
**, struct symbol
*);
301 extern void bind_symbol(struct symbol
*, struct ident
*, enum namespace);
303 extern struct symbol
*examine_symbol_type(struct symbol
*);
304 extern struct symbol
*examine_pointer_target(struct symbol
*);
305 extern void examine_simple_symbol_type(struct symbol
*);
306 extern const char *show_typename(struct symbol
*sym
);
307 extern const char *builtin_typename(struct symbol
*sym
);
308 extern const char *builtin_ctypename(struct ctype
*ctype
);
309 extern const char* get_type_name(enum type type
);
311 extern void debug_symbol(struct symbol
*);
312 extern void merge_type(struct symbol
*sym
, struct symbol
*base_type
);
313 extern void check_declaration(struct symbol
*sym
);
315 static inline struct symbol
*get_base_type(const struct symbol
*sym
)
317 return examine_symbol_type(sym
->ctype
.base_type
);
320 static inline int is_int_type(const struct symbol
*type
)
322 if (type
->type
== SYM_NODE
)
323 type
= type
->ctype
.base_type
;
324 if (type
->type
== SYM_ENUM
)
325 type
= type
->ctype
.base_type
;
326 return type
->type
== SYM_BITFIELD
||
327 type
->ctype
.base_type
== &int_type
;
330 static inline int is_enum_type(const struct symbol
*type
)
332 if (type
->type
== SYM_NODE
)
333 type
= type
->ctype
.base_type
;
334 return (type
->type
== SYM_ENUM
);
337 static inline int is_type_type(struct symbol
*type
)
339 return (type
->ctype
.modifiers
& MOD_TYPE
) != 0;
342 static inline int is_ptr_type(struct symbol
*type
)
344 if (type
->type
== SYM_NODE
)
345 type
= type
->ctype
.base_type
;
346 return type
->type
== SYM_PTR
|| type
->type
== SYM_ARRAY
|| type
->type
== SYM_FN
;
349 static inline int is_float_type(struct symbol
*type
)
351 if (type
->type
== SYM_NODE
)
352 type
= type
->ctype
.base_type
;
353 return type
->ctype
.base_type
== &fp_type
;
356 static inline int is_byte_type(struct symbol
*type
)
358 return type
->bit_size
== bits_in_char
&& type
->type
!= SYM_BITFIELD
;
361 static inline int is_void_type(struct symbol
*type
)
363 if (type
->type
== SYM_NODE
)
364 type
= type
->ctype
.base_type
;
365 return type
== &void_ctype
;
368 static inline int is_bool_type(struct symbol
*type
)
370 if (type
->type
== SYM_NODE
)
371 type
= type
->ctype
.base_type
;
372 return type
== &bool_ctype
;
375 static inline int is_function(struct symbol
*type
)
377 return type
&& type
->type
== SYM_FN
;
380 static inline int is_extern_inline(struct symbol
*sym
)
382 return (sym
->ctype
.modifiers
& MOD_EXTERN
) &&
383 (sym
->ctype
.modifiers
& MOD_INLINE
) &&
384 is_function(sym
->ctype
.base_type
);
387 static inline int get_sym_type(struct symbol
*type
)
389 if (type
->type
== SYM_NODE
)
390 type
= type
->ctype
.base_type
;
391 if (type
->type
== SYM_ENUM
)
392 type
= type
->ctype
.base_type
;
396 static inline struct symbol
*lookup_keyword(struct ident
*ident
, enum namespace ns
)
400 return lookup_symbol(ident
, ns
);
403 #define is_restricted_type(type) (get_sym_type(type) == SYM_RESTRICT)
404 #define is_fouled_type(type) (get_sym_type(type) == SYM_FOULED)
405 #define is_bitfield_type(type) (get_sym_type(type) == SYM_BITFIELD)
406 extern int is_ptr_type(struct symbol
*);
408 void create_fouled(struct symbol
*type
);
409 struct symbol
*befoul(struct symbol
*type
);
411 #endif /* SYMBOL_H */