4 * This is pretty trivial.
6 * Copyright (C) 2003 Transmeta Corp.
7 * 2003-2004 Linus Torvalds
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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
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21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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24 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
36 static struct scope builtin_scope
= { .next
= &builtin_scope
};
38 struct scope
*block_scope
= &builtin_scope
, // regular automatic variables etc
39 *function_scope
= &builtin_scope
, // labels, arguments etc
40 *file_scope
= &builtin_scope
, // static
41 *global_scope
= &builtin_scope
; // externally visible
43 void bind_scope(struct symbol
*sym
, struct scope
*scope
)
46 add_symbol(&scope
->symbols
, sym
);
49 static void start_scope(struct scope
**s
)
51 struct scope
*scope
= __alloc_scope(0);
52 memset(scope
, 0, sizeof(*scope
));
57 void start_file_scope(void)
59 struct scope
*scope
= __alloc_scope(0);
61 memset(scope
, 0, sizeof(*scope
));
62 scope
->next
= &builtin_scope
;
65 /* top-level stuff defaults to file scope, "extern" etc will choose global scope */
66 function_scope
= scope
;
70 void start_symbol_scope(void)
72 start_scope(&block_scope
);
75 void start_function_scope(void)
77 start_scope(&function_scope
);
78 start_scope(&block_scope
);
81 static void remove_symbol_scope(struct symbol
*sym
)
83 struct symbol
**ptr
= &sym
->ident
->symbols
;
86 ptr
= &(*ptr
)->next_id
;
90 static void end_scope(struct scope
**s
)
92 struct scope
*scope
= *s
;
93 struct symbol_list
*symbols
= scope
->symbols
;
97 scope
->symbols
= NULL
;
98 FOR_EACH_PTR(symbols
, sym
) {
99 remove_symbol_scope(sym
);
100 } END_FOR_EACH_PTR(sym
);
103 void end_file_scope(void)
105 end_scope(&file_scope
);
108 void new_file_scope(void)
110 if (file_scope
!= &builtin_scope
)
115 void end_symbol_scope(void)
117 end_scope(&block_scope
);
120 void end_function_scope(void)
122 end_scope(&block_scope
);
123 end_scope(&function_scope
);
126 int is_outer_scope(struct scope
*scope
)
128 if (scope
== block_scope
)
130 if (scope
== &builtin_scope
&& block_scope
->next
== &builtin_scope
)