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_NOTYPE,
  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         OBERON_TYPE_NIL
  51 };
  52
  53 typedef oberon_expr_t * (*GenerateFuncCallback)(oberon_context_t *, int, oberon_expr_t *);
  54 typedef void (*GenerateProcCallback)(oberon_context_t *, int, oberon_expr_t *);
  55
  56 struct oberon_type_t
  57 {
  58         enum oberon_type_kind class;
  59         int size;
  60
  61         int num_decl;
  62         oberon_type_t * base;
  63         oberon_object_t * decl;
  64         oberon_scope_t * scope;
  65
  66         bool sysproc;
  67         GenerateFuncCallback genfunc;
  68         GenerateProcCallback genproc;
  69
  70         oberon_module_t * module;
  71
  72         int recursive;
  73         int initialized;
  74         gen_type_t * gen_type;
  75 };
  76
  77 enum oberon_object_kind
  78 {
  79         OBERON_CLASS_VAR,
  80         OBERON_CLASS_TYPE,
  81         OBERON_CLASS_PROC,
  82         OBERON_CLASS_PARAM,
  83         OBERON_CLASS_VAR_PARAM,
  84         OBERON_CLASS_CONST,
  85         OBERON_CLASS_FIELD,
  86         OBERON_CLASS_MODULE
  87 };
  88
  89 struct oberon_object_t
  90 {
  91         char * name;
  92         enum oberon_object_kind class;
  93         int export;
  94         int read_only;
  95
  96         int local;
  97         int linked;
  98         int initialized;
  99
 100         oberon_object_t * parent;
 101         oberon_type_t * parent_type;
 102
 103         oberon_scope_t * scope; // for proc
 104         int has_return; // for proc
 105
 106         oberon_type_t * type;
 107         oberon_item_t * value;
 108         oberon_object_t * next;
 109
 110         oberon_module_t * module;
 111
 112         gen_var_t * gen_var;
 113         gen_proc_t * gen_proc;
 114 };
 115
 116 struct oberon_module_t
 117 {
 118         char * name;
 119         int ready;
 120
 121         oberon_scope_t * decl;
 122
 123         oberon_module_t * next;
 124
 125         gen_module_t * gen_mod;
 126 };
 127
 128 typedef const char * (*ModuleImportCallback)(const char * name);
 129
 130 struct oberon_context_t
 131 {
 132         /*** SCANER DATA ***/
 133         const char * code;
 134         int code_index;
 135
 136         char c;
 137         int token;
 138         char * string;
 139         int64_t integer;
 140         double real;
 141         bool longmode;
 142         /*** END SCANER DATA ***/
 143
 144         /*** PARSER DATA ***/
 145         oberon_scope_t * decl;
 146         oberon_module_t * mod;
 147         /*** END PARSER DATA ***/
 148
 149         oberon_type_t * notype_type;
 150         oberon_type_t * nil_type;
 151         oberon_type_t * bool_type;
 152         oberon_type_t * byte_type;
 153         oberon_type_t * shortint_type;
 154         oberon_type_t * int_type;
 155         oberon_type_t * longint_type;
 156         oberon_type_t * real_type;
 157         oberon_type_t * longreal_type;
 158         oberon_type_t * char_type;
 159         oberon_type_t * string_type;
 160         oberon_type_t * set_type;
 161
 162         oberon_scope_t * world_scope;
 163         oberon_module_t * module_list;
 164         ModuleImportCallback import_module;
 165         gen_context_t * gen_context;
 166 };
 167
 168 enum oberon_mode_kind
 169 {
 170         MODE_VAR,
 171         MODE_INTEGER,
 172         MODE_BOOLEAN,
 173         MODE_CALL,
 174         MODE_INDEX,
 175         MODE_FIELD,
 176         MODE_DEREF,
 177         MODE_NIL,
 178         MODE_NEW,
 179         MODE_REAL,
 180         MODE_CHAR,
 181         MODE_STRING,
 182         MODE_TYPE,
 183         MODE_SET
 184 };
 185
 186 enum oberon_operator_kind
 187 {
 188         OP_UNARY_MINUS,
 189         OP_LOGIC_NOT,
 190         OP_ABS,
 191         OP_CAP,
 192
 193         OP_ADD,
 194         OP_SUB,
 195         OP_MUL,
 196         OP_DIV,
 197         OP_MOD,
 198         OP_LOGIC_AND,
 199         OP_LOGIC_OR,
 200
 201         OP_EQ,
 202         OP_NEQ,
 203         OP_LSS,
 204         OP_LEQ,
 205         OP_GRT,
 206         OP_GEQ,
 207
 208         OP_CAST,
 209         OP_IS,
 210
 211         OP_RANGE,
 212         OP_UNION,
 213         OP_INTERSECTION,
 214         OP_DIFFERENCE,
 215         OP_SYM_DIFFERENCE,
 216         OP_COMPLEMENTATION,
 217         OP_IN,
 218
 219         OP_ASH
 220 };
 221
 222 struct oberon_item_t
 223 {
 224         bool is_item; // == 1
 225         oberon_type_t * result;
 226         oberon_expr_t * next;
 227         bool read_only;
 228
 229         enum oberon_mode_kind mode;
 230         long integer;
 231         double real;
 232         char * string;
 233         oberon_object_t * var;
 234
 235         oberon_item_t * parent;
 236
 237         int num_args;
 238         oberon_expr_t * args;
 239 };
 240
 241 struct oberon_oper_t
 242 {
 243         bool is_item; // == 0
 244         oberon_type_t * result;
 245         oberon_expr_t * next;
 246         bool read_only;
 247
 248         enum oberon_operator_kind op;
 249         oberon_expr_t * left;
 250         oberon_expr_t * right;
 251 };
 252
 253 union oberon_expr_t
 254 {
 255         struct {
 256                 bool is_item;
 257                 oberon_type_t * result;
 258                 oberon_expr_t * next;
 259                 bool read_only;
 260         };
 261
 262         oberon_item_t item;
 263         oberon_oper_t oper;
 264 };
 265
 266 #endif // OBERON_INTERNALS_H