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_block_t gen_block_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
  35 enum
  36 {
  37         OBERON_TYPE_VOID,
  38         OBERON_TYPE_INTEGER,
  39         OBERON_TYPE_BOOLEAN,
  40         OBERON_TYPE_PROCEDURE,
  41         OBERON_TYPE_ARRAY,
  42         OBERON_TYPE_RECORD,
  43         OBERON_TYPE_POINTER,
  44         OBERON_TYPE_REAL
  45 };
  46
  47 struct oberon_type_t
  48 {
  49         int class;
  50         int size;
  51
  52         int num_decl;
  53         oberon_type_t * base;
  54         oberon_object_t * decl;
  55
  56         oberon_module_t * module;
  57
  58         int recursive;
  59         int initialized;
  60         gen_type_t * gen_type;
  61 };
  62
  63 enum
  64 {
  65         OBERON_CLASS_VAR,
  66         OBERON_CLASS_TYPE,
  67         OBERON_CLASS_PROC,
  68         OBERON_CLASS_PARAM,
  69         OBERON_CLASS_VAR_PARAM,
  70         OBERON_CLASS_CONST,
  71         OBERON_CLASS_FIELD,
  72         OBERON_CLASS_MODULE
  73 };
  74
  75 typedef oberon_expr_t * (*GenerateFuncCallback)(oberon_context_t *, int, oberon_expr_t *);
  76 typedef void (*GenerateProcCallback)(oberon_context_t *, int, oberon_expr_t *);
  77
  78 struct oberon_object_t
  79 {
  80         char * name;
  81         int class;
  82         int export;
  83         int read_only;
  84
  85         int local;
  86         int linked;
  87         int initialized;
  88
  89         oberon_object_t * parent;
  90         oberon_type_t * parent_type;
  91
  92         oberon_scope_t * scope; // for proc
  93         int has_return; // for proc
  94         int sysproc;
  95         GenerateFuncCallback genfunc;
  96         GenerateProcCallback genproc;
  97
  98         oberon_type_t * type;
  99         oberon_item_t * value;
 100         oberon_object_t * next;
 101
 102         oberon_module_t * module;
 103
 104         gen_var_t * gen_var;
 105         gen_proc_t * gen_proc;
 106 };
 107
 108 struct oberon_module_t
 109 {
 110         char * name;
 111         int ready;
 112
 113         oberon_scope_t * decl;
 114
 115         oberon_module_t * next;
 116
 117         gen_module_t * gen_mod;
 118 };
 119
 120 typedef const char * (*ModuleImportCallback)(const char * name);
 121
 122 struct oberon_context_t
 123 {
 124         /*** SCANER DATA ***/
 125         const char * code;
 126         int code_index;
 127
 128         char c;
 129         int token;
 130         char * string;
 131         int64_t integer;
 132         double real;
 133         bool longmode;
 134         /*** END SCANER DATA ***/
 135
 136         /*** PARSER DATA ***/
 137         oberon_scope_t * decl;
 138         oberon_module_t * mod;
 139         /*** END PARSER DATA ***/
 140
 141         oberon_type_t * bool_type;
 142         oberon_type_t * byte_type;
 143         oberon_type_t * shortint_type;
 144         oberon_type_t * int_type;
 145         oberon_type_t * longint_type;
 146         oberon_type_t * real_type;
 147         oberon_type_t * longreal_type;
 148         oberon_type_t * void_type;
 149         oberon_type_t * void_ptr_type;
 150
 151         oberon_scope_t * world_scope;
 152         oberon_module_t * module_list;
 153         ModuleImportCallback import_module;
 154         gen_context_t * gen_context;
 155 };
 156
 157 enum
 158 {
 159         MODE_VAR,
 160         MODE_INTEGER,
 161         MODE_BOOLEAN,
 162         MODE_CALL,
 163         MODE_INDEX,
 164         MODE_FIELD,
 165         MODE_DEREF,
 166         MODE_NIL,
 167         MODE_NEW,
 168         MODE_REAL,
 169         MODE_CAST
 170 };
 171
 172 enum
 173 {
 174         OP_UNARY_MINUS,
 175         OP_BITWISE_NOT,
 176         OP_LOGIC_NOT,
 177         OP_ABS,
 178
 179         OP_ADD,
 180         OP_SUB,
 181         OP_MUL,
 182         OP_DIV,
 183         OP_MOD,
 184         OP_BITWISE_AND,
 185         OP_BITWISE_XOR,
 186         OP_BITWISE_OR,
 187         OP_LOGIC_AND,
 188         OP_LOGIC_OR,
 189
 190         OP_EQ,
 191         OP_NEQ,
 192         OP_LSS,
 193         OP_LEQ,
 194         OP_GRT,
 195         OP_GEQ
 196 };
 197
 198 struct oberon_item_t
 199 {
 200         int is_item; // == 1
 201         oberon_type_t * result;
 202         oberon_expr_t * next;
 203         int read_only;
 204
 205         int mode;
 206         long integer;
 207         double real;
 208         int boolean;
 209         oberon_object_t * var;
 210
 211         oberon_expr_t * parent;
 212
 213         int num_args;
 214         oberon_expr_t * args;
 215 };
 216
 217 struct oberon_oper_t
 218 {
 219         int is_item; // == 0
 220         oberon_type_t * result;
 221         oberon_expr_t * next;
 222         int read_only;
 223
 224         int op;
 225         oberon_expr_t * left;
 226         oberon_expr_t * right;
 227 };
 228
 229 union oberon_expr_t
 230 {
 231         struct {
 232                 int is_item;
 233                 oberon_type_t * result;
 234                 oberon_expr_t * next;
 235                 int read_only;
 236         };
 237
 238         oberon_item_t item;
 239         oberon_oper_t oper;
 240 };
 241
 242 #endif // OBERON_INTERNALS_H