src/oberon-internals.h

   1 #ifndef OBERON_INTERNALS_H
   2 #define OBERON_INTERNALS_H
   3
   4 #include <stdint.h>
   5 #include <stdbool.h>
   6
   7 typedef struct gen_module_t gen_module_t;
   8 typedef struct gen_proc_t gen_proc_t;
   9 typedef struct gen_type_t gen_type_t;
  10 typedef struct gen_var_t gen_var_t;
  11 typedef struct gen_label_t gen_label_t;
  12 typedef struct gen_context_t gen_context_t;
  13
  14 typedef struct oberon_type_t oberon_type_t;
  15 typedef struct oberon_object_t oberon_object_t;
  16 typedef struct oberon_module_t oberon_module_t;
  17 typedef struct oberon_context_t oberon_context_t;
  18 typedef struct oberon_scope_t oberon_scope_t;
  19
  20 typedef struct oberon_item_t oberon_item_t;
  21 typedef struct oberon_oper_t oberon_oper_t;
  22 typedef union oberon_expr_t oberon_expr_t;
  23
  24 struct oberon_scope_t
  25 {
  26         oberon_context_t * ctx;
  27         oberon_object_t * list;
  28         oberon_scope_t * up;
  29
  30         int local;
  31         oberon_object_t * parent;
  32         oberon_type_t * parent_type;
  33
  34         gen_label_t * exit_label;
  35 };
  36
  37 enum oberon_type_kind
  38 {
  39         OBERON_TYPE_VOID,
  40         OBERON_TYPE_INTEGER,
  41         OBERON_TYPE_BOOLEAN,
  42         OBERON_TYPE_PROCEDURE,
  43         OBERON_TYPE_ARRAY,
  44         OBERON_TYPE_RECORD,
  45         OBERON_TYPE_POINTER,
  46         OBERON_TYPE_REAL,
  47         OBERON_TYPE_CHAR,
  48         OBERON_TYPE_STRING,
  49         OBERON_TYPE_SET
  50 };
  51
  52 typedef oberon_expr_t * (*GenerateFuncCallback)(oberon_context_t *, int, oberon_expr_t *);
  53 typedef void (*GenerateProcCallback)(oberon_context_t *, int, oberon_expr_t *);
  54
  55 struct oberon_type_t
  56 {
  57         enum oberon_type_kind class;
  58         int size;
  59
  60         int num_decl;
  61         oberon_type_t * base;
  62         oberon_object_t * decl;
  63         oberon_scope_t * scope;
  64
  65         bool sysproc;
  66         GenerateFuncCallback genfunc;
  67         GenerateProcCallback genproc;
  68
  69         oberon_module_t * module;
  70
  71         int recursive;
  72         int initialized;
  73         gen_type_t * gen_type;
  74 };
  75
  76 enum oberon_object_kind
  77 {
  78         OBERON_CLASS_VAR,
  79         OBERON_CLASS_TYPE,
  80         OBERON_CLASS_PROC,
  81         OBERON_CLASS_PARAM,
  82         OBERON_CLASS_VAR_PARAM,
  83         OBERON_CLASS_CONST,
  84         OBERON_CLASS_FIELD,
  85         OBERON_CLASS_MODULE
  86 };
  87
  88 struct oberon_object_t
  89 {
  90         char * name;
  91         enum oberon_object_kind class;
  92         int export;
  93         int read_only;
  94
  95         int local;
  96         int linked;
  97         int initialized;
  98
  99         oberon_object_t * parent;
 100         oberon_type_t * parent_type;
 101
 102         oberon_scope_t * scope; // for proc
 103         int has_return; // for proc
 104
 105         oberon_type_t * type;
 106         oberon_item_t * value;
 107         oberon_object_t * next;
 108
 109         oberon_module_t * module;
 110
 111         gen_var_t * gen_var;
 112         gen_proc_t * gen_proc;
 113 };
 114
 115 struct oberon_module_t
 116 {
 117         char * name;
 118         int ready;
 119
 120         oberon_scope_t * decl;
 121
 122         oberon_module_t * next;
 123
 124         gen_module_t * gen_mod;
 125 };
 126
 127 typedef const char * (*ModuleImportCallback)(const char * name);
 128
 129 struct oberon_context_t
 130 {
 131         /*** SCANER DATA ***/
 132         const char * code;
 133         int code_index;
 134
 135         char c;
 136         int token;
 137         char * string;
 138         int64_t integer;
 139         double real;
 140         bool longmode;
 141         /*** END SCANER DATA ***/
 142
 143         /*** PARSER DATA ***/
 144         oberon_scope_t * decl;
 145         oberon_module_t * mod;
 146         /*** END PARSER DATA ***/
 147
 148         oberon_type_t * void_type;
 149         oberon_type_t * void_ptr_type;
 150         oberon_type_t * bool_type;
 151         oberon_type_t * byte_type;
 152         oberon_type_t * shortint_type;
 153         oberon_type_t * int_type;
 154         oberon_type_t * longint_type;
 155         oberon_type_t * real_type;
 156         oberon_type_t * longreal_type;
 157         oberon_type_t * char_type;
 158         oberon_type_t * string_type;
 159         oberon_type_t * set_type;
 160
 161         oberon_scope_t * world_scope;
 162         oberon_module_t * module_list;
 163         ModuleImportCallback import_module;
 164         gen_context_t * gen_context;
 165 };
 166
 167 enum oberon_mode_kind
 168 {
 169         MODE_VAR,
 170         MODE_INTEGER,
 171         MODE_BOOLEAN,
 172         MODE_CALL,
 173         MODE_INDEX,
 174         MODE_FIELD,
 175         MODE_DEREF,
 176         MODE_NIL,
 177         MODE_NEW,
 178         MODE_REAL,
 179         MODE_CHAR,
 180         MODE_STRING,
 181         MODE_TYPE,
 182         MODE_SET
 183 };
 184
 185 enum oberon_operator_kind
 186 {
 187         OP_UNARY_MINUS,
 188         OP_LOGIC_NOT,
 189         OP_ABS,
 190
 191         OP_ADD,
 192         OP_SUB,
 193         OP_MUL,
 194         OP_DIV,
 195         OP_MOD,
 196         OP_LOGIC_AND,
 197         OP_LOGIC_OR,
 198
 199         OP_EQ,
 200         OP_NEQ,
 201         OP_LSS,
 202         OP_LEQ,
 203         OP_GRT,
 204         OP_GEQ,
 205
 206         OP_CAST,
 207         OP_IS,
 208
 209         OP_RANGE,
 210         OP_UNION,
 211         OP_INTERSECTION,
 212         OP_DIFFERENCE,
 213         OP_SYM_DIFFERENCE,
 214         OP_COMPLEMENTATION,
 215         OP_IN
 216 };
 217
 218 struct oberon_item_t
 219 {
 220         bool is_item; // == 1
 221         oberon_type_t * result;
 222         oberon_expr_t * next;
 223         bool read_only;
 224
 225         enum oberon_mode_kind mode;
 226         long integer;
 227         double real;
 228         char * string;
 229         oberon_object_t * var;
 230
 231         oberon_item_t * parent;
 232
 233         int num_args;
 234         oberon_expr_t * args;
 235 };
 236
 237 struct oberon_oper_t
 238 {
 239         bool is_item; // == 0
 240         oberon_type_t * result;
 241         oberon_expr_t * next;
 242         bool read_only;
 243
 244         enum oberon_operator_kind op;
 245         oberon_expr_t * left;
 246         oberon_expr_t * right;
 247 };
 248
 249 union oberon_expr_t
 250 {
 251         struct {
 252                 bool is_item;
 253                 oberon_type_t * result;
 254                 oberon_expr_t * next;
 255                 bool read_only;
 256         };
 257
 258         oberon_item_t item;
 259         oberon_oper_t oper;
 260 };
 261
 262 #endif // OBERON_INTERNALS_H