mirror of
https://git.code.sf.net/p/quake/quakeforge
synced 2024-11-14 08:50:58 +00:00
239 lines
7.3 KiB
C
239 lines
7.3 KiB
C
/*
|
|
symtab.h
|
|
|
|
Symbol table management
|
|
|
|
Copyright (C) 2011 Bill Currie <bill@taniwha.org>
|
|
|
|
Author: Bill Currie <bill@taniwha.org>
|
|
Date: 2011/01/04
|
|
|
|
This program is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License
|
|
as published by the Free Software Foundation; either version 2
|
|
of the License, or (at your option) any later version.
|
|
|
|
This program is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
|
|
|
|
See the GNU General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; if not, write to:
|
|
|
|
Free Software Foundation, Inc.
|
|
59 Temple Place - Suite 330
|
|
Boston, MA 02111-1307, USA
|
|
|
|
*/
|
|
|
|
#ifndef __symtab_h
|
|
#define __symtab_h
|
|
|
|
#include "expr.h"
|
|
|
|
struct defspace_s;
|
|
enum storage_class_e;
|
|
|
|
/** \defgroup qfcc_symtab Symbol Table Management
|
|
\ingroup qfcc
|
|
*/
|
|
//@{
|
|
|
|
typedef enum vis_e {
|
|
vis_public,
|
|
vis_protected,
|
|
vis_private,
|
|
} vis_t;
|
|
|
|
typedef enum {
|
|
sy_var, ///< symbol refers to a variable
|
|
sy_const, ///< symbol refers to a constant
|
|
sy_type, ///< symbol refers to a type
|
|
sy_expr, ///< symbol refers to an expression
|
|
sy_func, ///< symbol refers to a function
|
|
sy_class, ///< symbol refers to a class
|
|
} sy_type_e;
|
|
|
|
typedef struct symbol_s {
|
|
struct symbol_s *next; ///< chain of symbols in symbol table
|
|
struct symtab_s *table; ///< symbol table that owns this symbol
|
|
vis_t visibility; ///< symbol visiblity. defaults to public
|
|
const char *name; ///< symbol name
|
|
sy_type_e sy_type; ///< symbol type
|
|
struct type_s *type; ///< type of object to which symbol refers
|
|
struct param_s *params; ///< the parameters if a function
|
|
struct flowvar_s *flowvar;
|
|
struct daglabel_s *daglabel;///< dag label for this symbol
|
|
union {
|
|
int offset; ///< sy_var (in a struct/union)
|
|
struct def_s *def; ///< sy_var
|
|
struct ex_value_s *value; ///< sy_const
|
|
struct expr_s *expr; ///< sy_expr
|
|
struct function_s *func; ///< sy_func
|
|
} s;
|
|
} symbol_t;
|
|
|
|
typedef enum {
|
|
stab_global, ///< global (many symbols)
|
|
stab_local, ///< local (few symbols: func)
|
|
stab_struct,
|
|
stab_union,
|
|
stab_enum,
|
|
} stab_type_e;
|
|
|
|
typedef struct symtab_s {
|
|
struct symtab_s *parent; ///< points to parent table
|
|
struct symtab_s *next; ///< next in global collection of symtabs
|
|
stab_type_e type; ///< type of symbol table
|
|
int size; ///< size of structure represented by symtab
|
|
struct hashtab_s *tab; ///< symbols defined in this table
|
|
symbol_t *symbols; ///< chain of symbols in this table
|
|
symbol_t **symtail; ///< keep chain in declaration order
|
|
struct defspace_s *space; ///< storage for vars in scope symtabs
|
|
} symtab_t;
|
|
|
|
/** Create a new, empty named symbol.
|
|
|
|
Only the symbol name field will be filled in. \a name will be copied
|
|
using save_string().
|
|
|
|
\param name The name of the symbol.
|
|
\return The new symbol.
|
|
*/
|
|
symbol_t *new_symbol (const char *name);
|
|
|
|
/** Create a new, typed, named symbol.
|
|
|
|
Only the symbol name and type fields will be filled in. \a name will
|
|
be copied using save_string().
|
|
|
|
\param name The name of the symbol.
|
|
\param type The type of the symbol.
|
|
\return The new symbol.
|
|
*/
|
|
symbol_t *new_symbol_type (const char *name, struct type_s *type);
|
|
|
|
/** Create a new, empty symbol table.
|
|
|
|
The symbol tables support scoping via their \c parent pointer. This
|
|
supports both code block scoping and ivar inheritance.
|
|
|
|
\param parent Pointer to parent scope symbol table.
|
|
\param type The type of symbol table. Currently governs expected size.
|
|
\return The new, empty symbol table.
|
|
*/
|
|
symtab_t *new_symtab (symtab_t *parent, stab_type_e type);
|
|
|
|
/** Lookup a name in the symbol table.
|
|
|
|
The entire symbol table chain (symtab_t::parent) starting at symtab
|
|
will be checked for \a name.
|
|
|
|
\param symtab The symbol table to search for \a name. If \a name is
|
|
not in the symbol table, the tables's parent, if it
|
|
exists, will be checked, and then its parent, until the
|
|
end of the chain.
|
|
\param name The name to look up in the symbol table chain.
|
|
*/
|
|
symbol_t *symtab_lookup (symtab_t *symtab, const char *name);
|
|
|
|
/** Add a symbol to the symbol table.
|
|
|
|
If there is already a symbol with the same name in the symbol table,
|
|
the symbol will not be added to the table, and the symbol that was
|
|
found in the table witll be returned.
|
|
|
|
\param symtab The symol table to which the symbol will be added.
|
|
\param symbol The symbol to be added to the symbol table.
|
|
\return The symbol as in the table, either \a symbol if no
|
|
symbol with the same name is already in the symbol
|
|
table, or the symbol that was found in the table.
|
|
*/
|
|
symbol_t *symtab_addsymbol (symtab_t *symtab, symbol_t *symbol);
|
|
|
|
/** Remove a symbol from the symbol table.
|
|
|
|
\param symtab The symol table from which the symbol will be removed.
|
|
\param symbol The symbol to be removed from the symbol table.
|
|
\return The symbol as was in the table, or NULL if not found.
|
|
*/
|
|
symbol_t *symtab_removesymbol (symtab_t *symtab, symbol_t *symbol);
|
|
|
|
/** Make a copy of a symbol.
|
|
|
|
The new symbol will not be associated with any table.
|
|
|
|
\param symbol The symbol to be copied.
|
|
\return The new symbol.
|
|
*/
|
|
symbol_t *copy_symbol (symbol_t *symbol);
|
|
|
|
/** Create a new single symbol table from the given symbol table chain.
|
|
|
|
Create a new symbol table and add all of the symbols from the given
|
|
symbol table chain to the new symbol table. However, in order to
|
|
preserve scoping rules, duplicate names in ancestor tables will not be
|
|
added to the new table.
|
|
|
|
The new symbol table will be "local".
|
|
|
|
The intended use is for creating the ivar scope for methods.
|
|
|
|
\param symtab The symbol table chain to be copied.
|
|
\param parent The parent symbol table of the new symbol table, or
|
|
null.
|
|
\return The new symbol table.
|
|
|
|
\dot
|
|
digraph symtab_flat_copy {
|
|
layout=dot; rankdir=LR; compound=true; nodesep=1.0;
|
|
subgraph clusterI {
|
|
node [shape=record];
|
|
root [label="<p>parent|integer\ x;|integer\ y;|float\ z;"];
|
|
base [label="<p>parent|float\ w;|float\ x;"];
|
|
cur [label="<p>parent|float\ y;"];
|
|
symtab [shape=ellipse];
|
|
cur:p -> base;
|
|
base:p -> root;
|
|
}
|
|
subgraph clusterO {
|
|
node [shape=record];
|
|
out [label="<p>parent|float\ z;|float\ w;|float\ x;|float\ y;"];
|
|
return [shape=ellipse];
|
|
parent [shape=ellipse];
|
|
}
|
|
symtab -> cur;
|
|
cur -> out [ltail=clusterI,lhead=clusterO];
|
|
out:p -> parent;
|
|
return -> out;
|
|
}
|
|
\enddot
|
|
*/
|
|
symtab_t *symtab_flat_copy (symtab_t *symtab, symtab_t *parent);
|
|
|
|
/** Create a global symbol and allocate space for a variable.
|
|
|
|
If the symbol already exists, it must be of the correct type. If it
|
|
is external, it will be converted to the given storage class and
|
|
allocatged space from the given defspace, otherwise it will be
|
|
returned.
|
|
|
|
If the symbol is new, it will be allocated space from the given
|
|
defspace with the given storage class.
|
|
|
|
\param name The name of the symbol.
|
|
\param type The type of the symbol.
|
|
\param space The defspace from which space will be allocated for the
|
|
symbol. Ignored for sc_extern, must not be null for
|
|
others.
|
|
\param storage The storage class for the symbol. Only sc_extern,
|
|
sc_global, and sc_static are valid.
|
|
*/
|
|
symbol_t *make_symbol (const char *name, struct type_s *type,
|
|
struct defspace_s *space, enum storage_class_e storage);
|
|
|
|
//@}
|
|
|
|
#endif//__symtab_h
|