symbol.h

   1 #ifndef SEMANTIC_H
   2 #define SEMANTIC_H
   3 /*
   4  * Basic symbol and namespace definitions.
   5  *
   6  * Copyright (C) 2003 Transmeta Corp, all rights reserved
   7  */
   8
   9 #include "token.h"
  10
  11 /*
  12  * An identifier with semantic meaning is a "symbol".
  13  *
  14  * There's a 1:n relationship: each symbol is always
  15  * associated with one identifier, while each identifier
  16  * can have one or more semantic meanings due to C scope
  17  * rules.
  18  *
  19  * The progression is symbol -> token -> identifier. The
  20  * token contains the information on where the symbol was
  21  * declared.
  22  */
  23 enum namespace {
  24         NS_NONE,
  25         NS_PREPROCESSOR,
  26         NS_TYPEDEF,
  27         NS_STRUCT,
  28         NS_ENUM,
  29         NS_LABEL,
  30         NS_SYMBOL,
  31 };
  32
  33 enum type {
  34         SYM_BASETYPE,
  35         SYM_NODE,
  36         SYM_PTR,
  37         SYM_FN,
  38         SYM_ARRAY,
  39         SYM_STRUCT,
  40         SYM_UNION,
  41         SYM_ENUM,
  42         SYM_TYPEDEF,
  43         SYM_TYPEOF,
  44         SYM_MEMBER,
  45         SYM_BITFIELD,
  46         SYM_LABEL,
  47 };
  48
  49 struct ctype {
  50         unsigned long modifiers;
  51         unsigned long alignment;
  52         unsigned int contextmask, context, as;
  53         struct symbol *base_type;
  54 };
  55
  56 struct symbol {
  57         enum namespace namespace:8;
  58         enum type type:8;
  59         struct position pos;            /* Where this symbol was declared */
  60         struct ident *ident;            /* What identifier this symbol is associated with */
  61         struct symbol *next_id;         /* Next semantic symbol that shares this identifier */
  62         struct symbol **id_list;        /* Backpointer to symbol list head */
  63         union {
  64                 struct preprocessor_sym {
  65                         int busy;
  66                         struct token *expansion;
  67                         struct token *arglist;
  68                 };
  69                 struct ctype_symbol {
  70                         struct symbol *next;            /* Next symbol at this level */
  71                         unsigned long   offset;
  72                         unsigned int    bit_size;
  73                         unsigned int    bit_offset:8,
  74                                         fieldwidth:8,
  75                                         arg_count:10,
  76                                         variadic:1;
  77                         int     array_size;
  78                         struct ctype ctype;
  79                         struct symbol_list *arguments;
  80                         struct statement *stmt;
  81                         struct symbol_list *symbol_list;
  82                         struct expression *initializer;
  83                         long long value;                /* Initial value */
  84                 };
  85         };
  86 };
  87
  88 /* Modifiers */
  89 #define MOD_AUTO        0x0001
  90 #define MOD_REGISTER    0x0002
  91 #define MOD_STATIC      0x0004
  92 #define MOD_EXTERN      0x0008
  93
  94 #define MOD_STORAGE     (MOD_AUTO | MOD_REGISTER | MOD_STATIC | MOD_EXTERN)
  95
  96 #define MOD_CONST       0x0010
  97 #define MOD_VOLATILE    0x0020
  98 #define MOD_SIGNED      0x0040
  99 #define MOD_UNSIGNED    0x0080
 100
 101 #define MOD_CHAR        0x0100
 102 #define MOD_SHORT       0x0200
 103 #define MOD_LONG        0x0400
 104 #define MOD_LONGLONG    0x0800
 105
 106 #define MOD_TYPEDEF     0x1000
 107 #define MOD_STRUCTOF    0x2000
 108 #define MOD_UNIONOF     0x4000
 109 #define MOD_ENUMOF      0x8000
 110
 111 #define MOD_TYPEOF      0x10000
 112 #define MOD_ATTRIBUTE   0x20000
 113
 114 #define MOD_NOCAST      0x100000
 115 #define MOD_NODEREF     0x200000
 116
 117 /* Basic types */
 118 extern struct symbol    void_type,
 119                         int_type,
 120                         fp_type,
 121                         vector_type,
 122                         bad_type;
 123
 124 /* C types */
 125 extern struct symbol    bool_ctype, void_ctype,
 126                         char_ctype, uchar_ctype,
 127                         short_ctype, ushort_ctype,
 128                         int_ctype, uint_ctype,
 129                         long_ctype, ulong_ctype,
 130                         llong_ctype, ullong_ctype,
 131                         float_ctype, double_ctype, ldouble_ctype,
 132                         string_ctype, ptr_ctype;
 133
 134
 135 /* Basic identifiers */
 136 extern struct ident     sizeof_ident,
 137                         alignof_ident,
 138                         __alignof_ident,
 139                         __alignof___ident,
 140                         if_ident,
 141                         else_ident,
 142                         switch_ident,
 143                         case_ident,
 144                         default_ident,
 145                         break_ident,
 146                         continue_ident,
 147                         for_ident,
 148                         while_ident,
 149                         do_ident,
 150                         goto_ident,
 151                         return_ident;
 152
 153 extern struct ident     __asm___ident,
 154                         __asm_ident,
 155                         asm_ident,
 156                         __volatile___ident,
 157                         __volatile_ident,
 158                         volatile_ident,
 159                         __attribute___ident,
 160                         __attribute_ident;
 161
 162 #define symbol_is_typename(sym) ((sym)->type == SYM_TYPE)
 163
 164 extern struct symbol *lookup_symbol(struct ident *, enum namespace);
 165 extern void init_symbols(void);
 166 extern struct symbol *alloc_symbol(struct position, int type);
 167 extern void show_type(struct symbol *);
 168 extern const char *modifier_string(unsigned long mod);
 169 extern void show_symbol(struct symbol *);
 170 extern void show_type_list(struct symbol *);
 171 extern void show_symbol_list(struct symbol_list *, const char *);
 172 extern void add_symbol(struct symbol_list **, struct symbol *);
 173 extern void bind_symbol(struct symbol *, struct ident *, enum namespace);
 174
 175 extern struct symbol *examine_symbol_type(struct symbol *);
 176 extern void examine_simple_symbol_type(struct symbol *);
 177
 178 #endif /* SEMANTIC_H */