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