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         oberon_type_t * shorter;
  61         oberon_type_t * longer;
  62
  63         int num_decl;
  64         oberon_type_t * base;
  65         oberon_object_t * decl;
  66         oberon_scope_t * scope;
  67
  68         bool sysproc;
  69         GenerateFuncCallback genfunc;
  70         GenerateProcCallback genproc;
  71
  72         oberon_module_t * module;
  73
  74         int recursive;
  75         int initialized;
  76         gen_type_t * gen_type;
  77 };
  78
  79 enum oberon_object_kind
  80 {
  81         OBERON_CLASS_VAR,
  82         OBERON_CLASS_TYPE,
  83         OBERON_CLASS_PROC,
  84         OBERON_CLASS_PARAM,
  85         OBERON_CLASS_VAR_PARAM,
  86         OBERON_CLASS_CONST,
  87         OBERON_CLASS_FIELD,
  88         OBERON_CLASS_MODULE
  89 };
  90
  91 struct oberon_object_t
  92 {
  93         char * name;
  94         enum oberon_object_kind class;
  95         int export;
  96         int read_only;
  97
  98         int local;
  99         int linked;
 100         int initialized;
 101
 102         oberon_object_t * parent;
 103         oberon_type_t * parent_type;
 104
 105         oberon_scope_t * scope; // for proc
 106         int has_return; // for proc
 107
 108         oberon_type_t * type;
 109         oberon_item_t * value;
 110         oberon_object_t * next;
 111
 112         oberon_module_t * module;
 113
 114         gen_var_t * gen_var;
 115         gen_proc_t * gen_proc;
 116 };
 117
 118 struct oberon_module_t
 119 {
 120         char * name;
 121         int ready;
 122
 123         oberon_scope_t * decl;
 124
 125         oberon_module_t * next;
 126
 127         gen_module_t * gen_mod;
 128 };
 129
 130 typedef const char * (*ModuleImportCallback)(const char * name);
 131
 132 struct oberon_context_t
 133 {
 134         /*** SCANER DATA ***/
 135         const char * code;
 136         int code_index;
 137
 138         char c;
 139         int token;
 140         char * string;
 141         int64_t integer;
 142         double real;
 143         bool longmode;
 144         /*** END SCANER DATA ***/
 145
 146         /*** PARSER DATA ***/
 147         oberon_scope_t * decl;
 148         oberon_module_t * mod;
 149         /*** END PARSER DATA ***/
 150
 151         oberon_type_t * notype_type;
 152         oberon_type_t * nil_type;
 153         oberon_type_t * bool_type;
 154         oberon_type_t * byte_type;
 155         oberon_type_t * shortint_type;
 156         oberon_type_t * int_type;
 157         oberon_type_t * longint_type;
 158         oberon_type_t * real_type;
 159         oberon_type_t * longreal_type;
 160         oberon_type_t * char_type;
 161         oberon_type_t * string_type;
 162         oberon_type_t * set_type;
 163
 164         oberon_scope_t * world_scope;
 165         oberon_module_t * module_list;
 166         ModuleImportCallback import_module;
 167         gen_context_t * gen_context;
 168 };
 169
 170 enum oberon_mode_kind
 171 {
 172         MODE_VAR,
 173         MODE_INTEGER,
 174         MODE_BOOLEAN,
 175         MODE_CALL,
 176         MODE_INDEX,
 177         MODE_FIELD,
 178         MODE_DEREF,
 179         MODE_NIL,
 180         MODE_NEW,
 181         MODE_REAL,
 182         MODE_CHAR,
 183         MODE_STRING,
 184         MODE_TYPE,
 185         MODE_SET,
 186         MODE_LEN
 187 };
 188
 189 enum oberon_operator_kind
 190 {
 191         OP_UNARY_MINUS,
 192         OP_LOGIC_NOT,
 193         OP_ABS,
 194         OP_CAP,
 195         OP_ENTIER,
 196
 197         OP_ADD,
 198         OP_SUB,
 199         OP_MUL,
 200         OP_DIV,
 201         OP_MOD,
 202         OP_LOGIC_AND,
 203         OP_LOGIC_OR,
 204
 205         OP_EQ,
 206         OP_NEQ,
 207         OP_LSS,
 208         OP_LEQ,
 209         OP_GRT,
 210         OP_GEQ,
 211
 212         OP_CAST,
 213         OP_IS,
 214
 215         OP_RANGE,
 216         OP_UNION,
 217         OP_INTERSECTION,
 218         OP_DIFFERENCE,
 219         OP_SYM_DIFFERENCE,
 220         OP_COMPLEMENTATION,
 221         OP_IN,
 222
 223         OP_ASH
 224 };
 225
 226 struct oberon_item_t
 227 {
 228         bool is_item; // == 1
 229         oberon_type_t * result;
 230         oberon_expr_t * next;
 231         bool read_only;
 232
 233         enum oberon_mode_kind mode;
 234         long integer;
 235         double real;
 236         char * string;
 237         oberon_object_t * var;
 238
 239         oberon_item_t * parent;
 240
 241         int num_args;
 242         oberon_expr_t * args;
 243 };
 244
 245 struct oberon_oper_t
 246 {
 247         bool is_item; // == 0
 248         oberon_type_t * result;
 249         oberon_expr_t * next;
 250         bool read_only;
 251
 252         enum oberon_operator_kind op;
 253         oberon_expr_t * left;
 254         oberon_expr_t * right;
 255 };
 256
 257 union oberon_expr_t
 258 {
 259         struct {
 260                 bool is_item;
 261                 oberon_type_t * result;
 262                 oberon_expr_t * next;
 263                 bool read_only;
 264         };
 265
 266         oberon_item_t item;
 267         oberon_oper_t oper;
 268 };
 269
 270 #endif // OBERON_INTERNALS_H