git.m6w6.name Git - m6w6/ext-psi/blob - src/parser_proc.y

   1 %include {
   2 #include <assert.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5
   6 #include "parser.h"
   7
   8 }
   9
  10 %name PSI_ParserProc
  11 %token_prefix PSI_T_
  12 %token_type {PSI_Token *}
  13 %token_destructor {free($$);}
  14 %default_destructor {(void)P;}
  15 %extra_argument {PSI_Parser *P}
  16 /* TOKEN is defined inside syntax_error */
  17 %syntax_error {
  18         if (TOKEN && TOKEN->type != PSI_T_EOF) {
  19                 PSI_ParserSyntaxError(P, P->psi.file.fn, P->line, "Unexpected token '%s'", TOKEN->text);
  20         } else {
  21                 PSI_ParserSyntaxError(P, P->psi.file.fn, P->line, "Unexpected end of input");
  22         }
  23 }
  24
  25 %nonassoc NAME.
  26 %left PLUS MINUS.
  27 %left SLASH ASTERISK.
  28 %fallback NAME TEMP FREE SET LET RETURN LIB INT UNSIGNED.
  29
  30 file ::= blocks.
  31
  32 blocks ::= block.
  33 blocks ::= blocks block.
  34
  35 block ::= EOF.
  36
  37 block ::= LIB(T) QUOTED_STRING(libname) EOS. {
  38         if (P->psi.file.ln) {
  39                 PSI_ParserSyntaxError(P, P->psi.file.ln, T->line, "Extra 'lib %s' statement has no effect", libname->text);
  40         } else {
  41                 P->psi.file.ln = strndup(libname->text + 1, libname->size - 2);
  42         }
  43         free(libname);
  44         free(T);
  45 }
  46
  47 block ::= decl(decl). {
  48         P->decls = add_decl(P->decls, decl);
  49 }
  50 block ::= impl(impl). {
  51         P->impls = add_impl(P->impls, impl);
  52 }
  53 block ::= decl_typedef(def). {
  54         P->defs = add_decl_typedef(P->defs, def);
  55         if (def->type->strct) {
  56                 P->structs = add_decl_struct(P->structs, def->type->strct);
  57         }
  58 }
  59 block ::= constant(constant). {
  60         P->consts = add_constant(P->consts, constant);
  61 }
  62 block ::= decl_struct(strct). {
  63         P->structs = add_decl_struct(P->structs, strct);
  64 }
  65
  66 %type decl_struct {decl_struct*}
  67 %destructor decl_struct {free_decl_struct($$);}
  68 decl_struct(strct) ::= STRUCT NAME(N) struct_size(size_) LBRACE struct_args(args) RBRACE. {
  69         strct = init_decl_struct(N->text, args);
  70         strct->size = size_;
  71         free(N);
  72 }
  73
  74 %type struct_size {size_t}
  75 struct_size(size) ::= . {
  76         size = 0;
  77 }
  78 struct_size(size) ::= COLON COLON LPAREN NUMBER(SIZ) RPAREN. {
  79         size = atol(SIZ->text);
  80         free(SIZ);
  81 }
  82
  83 %token_class const_type_token BOOL INT FLOAT STRING.
  84 %type const_type {const_type*}
  85 %destructor const_type {free_const_type($$);}
  86 const_type(type_) ::= const_type_token(T). {
  87         type_ = init_const_type(T->type, T->text);
  88         free(T);
  89 }
  90 %type constant {constant*}
  91 %destructor constant {free_constant($$);}
  92 constant(constant) ::= CONST const_type(type) NSNAME(T) EQUALS impl_def_val(val) EOS. {
  93         constant = init_constant(type, T->text, val);
  94         free(T);
  95 }
  96
  97 %type decl_typedef {decl_typedef*}
  98 %destructor decl_typedef {free_decl_typedef($$);}
  99 decl_typedef(def) ::= TYPEDEF decl_type(type) NAME(ALIAS) EOS. {
 100         def = init_decl_typedef(ALIAS->text, type);
 101         free(ALIAS);
 102 }
 103 /* support opaque types */
 104 decl_typedef(def) ::= TYPEDEF VOID(V) NAME(ALIAS) EOS. {
 105         def = init_decl_typedef(ALIAS->text, init_decl_type(V->type, V->text));
 106         def->type->token = V;
 107         //free(V);
 108         free(ALIAS);
 109 }
 110 decl_typedef(def) ::= TYPEDEF STRUCT(S) NAME(N) NAME(ALIAS) EOS. {
 111         def = init_decl_typedef(ALIAS->text, init_decl_type(S->type, N->text));
 112         def->type->token = N;
 113         free(ALIAS);
 114         free(S);
 115         //free(N);
 116 }
 117 decl_typedef(def) ::= TYPEDEF decl_struct(s) NAME(ALIAS) EOS. {
 118         def = init_decl_typedef(ALIAS->text, init_decl_type(PSI_T_STRUCT, s->name));
 119         def->type->token = ALIAS;
 120         def->type->strct = s;
 121         //free(ALIAS);
 122 }
 123
 124 %type decl {decl*}
 125 %destructor decl {free_decl($$);}
 126 decl(decl) ::= decl_abi(abi) decl_func(func) LPAREN decl_args(args) RPAREN EOS. {
 127         decl = init_decl(abi, func, args);
 128
 129 }
 130
 131 %type decl_func {decl_arg*}
 132 %destructor decl_func {free_decl_arg($$);}
 133 decl_func(func) ::= decl_arg(arg). {
 134         func = arg;
 135 }
 136 /* special case for void functions */
 137 decl_func(func) ::= VOID(T) NAME(N). {
 138         func = init_decl_arg(
 139                 init_decl_type(T->type, T->text),
 140                 init_decl_var(N->text, 0, 0)
 141         );
 142         func->type->token = T;
 143         //free(T);
 144         free(N);
 145 }
 146
 147 %type decl_abi {decl_abi*}
 148 %destructor decl_abi {free_decl_abi($$);}
 149 decl_abi(abi) ::= NAME(T). {
 150         abi = init_decl_abi(T->text);
 151         free(T);
 152 }
 153
 154 %type decl_var {decl_var*}
 155 %destructor decl_var {free_decl_var($$);}
 156 decl_var(var) ::= indirection(p) NAME(T). {
 157         var = init_decl_var(T->text, p, 0);
 158         free(T);
 159 }
 160 decl_var(var) ::= indirection(p) NAME(T) LBRACKET NUMBER(D) RBRACKET. {
 161         var = init_decl_var(T->text, p+1, atol(D->text));
 162         free(T);
 163         free(D);
 164 }
 165
 166 %type decl_vars {decl_vars*}
 167 %destructor decl_vars {free_decl_vars($$);}
 168 decl_vars(vars) ::= decl_var(var). {
 169         vars = init_decl_vars(var);
 170 }
 171 decl_vars(vars) ::= decl_vars(vars_) COMMA decl_var(var). {
 172         vars = add_decl_var(vars_, var);
 173 }
 174
 175 %type decl_arg {decl_arg*}
 176 %destructor decl_arg {free_decl_arg($$);}
 177 decl_arg(arg_) ::= const_decl_type(type) decl_var(var). {
 178         arg_ = init_decl_arg(type, var);
 179 }
 180 /* void pointers need a specific rule */
 181 decl_arg(arg_) ::= VOID(T) pointers(p) NAME(N). {
 182         arg_ = init_decl_arg(
 183                 init_decl_type(T->type, T->text),
 184                 init_decl_var(N->text, p, 0)
 185         );
 186         arg_->type->token = T;
 187         //free(T);
 188         free(N);
 189 }
 190 decl_arg(arg_) ::= CONST VOID(T) pointers(p) NAME(N). {
 191         arg_ = init_decl_arg(
 192                 init_decl_type(T->type, T->text),
 193                 init_decl_var(N->text, p, 0)
 194         );
 195         arg_->type->token = T;
 196         //free(T);
 197         free(N);
 198 }
 199
 200 %type decl_args {decl_args*}
 201 %destructor decl_args {free_decl_args($$);}
 202 decl_args ::= .
 203 decl_args ::= VOID.
 204 decl_args(args) ::= decl_arg(arg). {
 205         args = init_decl_args(arg);
 206 }
 207 decl_args(args) ::= decl_args(args_) COMMA decl_arg(arg). {
 208         args = add_decl_arg(args_, arg);
 209 }
 210 decl_args(args) ::= decl_args(args_) COMMA ELLIPSIS. {
 211         args = args_;
 212         args->varargs = 1;
 213 }
 214 %type struct_args {decl_args*}
 215 %destructor struct_args {free_decl_args($$);}
 216 struct_args(args) ::= struct_arg(arg). {
 217         args = init_decl_args(arg);
 218 }
 219 struct_args(args) ::= struct_args(args_) struct_arg(arg). {
 220         args = add_decl_arg(args_, arg);
 221 }
 222 %type struct_arg {decl_arg*}
 223 %destructor struct_arg {free_decl_arg($$);}
 224 struct_arg(arg) ::= decl_arg(arg_) struct_layout(layout_) EOS. {
 225         arg_->layout = layout_;
 226         arg = arg_;
 227 }
 228
 229 %type struct_layout {decl_struct_layout*}
 230 %destructor struct_layout {free_decl_struct_layout($$);}
 231 struct_layout(layout) ::= . {
 232         layout = NULL;
 233 }
 234 struct_layout(layout) ::= COLON COLON LPAREN NUMBER(POS) COMMA NUMBER(SIZ) RPAREN. {
 235         layout = init_decl_struct_layout(atol(POS->text), atol(SIZ->text));
 236         free(POS);
 237         free(SIZ);
 238 }
 239
 240 %token_class decl_type_token FLOAT DOUBLE INT8 UINT8 INT16 UINT16 INT32 UINT32 INT64 UINT64 NAME.
 241 %type decl_type {decl_type*}
 242 %destructor decl_type {free_decl_type($$);}
 243 decl_type(type_) ::= decl_type_token(T). {
 244         type_ = init_decl_type(T->type, T->text);
 245         type_->token = T;
 246         //free(T);
 247 }
 248 /* unsigned, urgh */
 249 decl_type(type_) ::= UNSIGNED NAME(T). {
 250         type_ = init_decl_type(T->type, T->text);
 251         type_->token = T;
 252         type_->name = realloc(type_->name, T->size + sizeof("unsigned"));
 253         memmove(type_->name + sizeof("unsigned"), type_->name, T->size);
 254         memcpy(type_->name, "unsigned", sizeof("unsigned")-1);
 255         type_->name[sizeof("unsigned")] = ' ';
 256         type_->name[T->size + sizeof("unsigned")] = 0;
 257         //free(T);
 258 }
 259 /* we have to support plain int here because we have it in our lexer rules */
 260 decl_type(type_) ::= INT(T). {
 261         type_ = init_decl_type(PSI_T_NAME, T->text);
 262         type_->token = T;
 263         //free(T);
 264 }
 265 /* structs ! */
 266 decl_type(type_) ::= STRUCT(S) NAME(T). {
 267         type_ = init_decl_type(S->type, T->text);
 268         type_->token = T;
 269         free(S);
 270         //free(T);
 271 }
 272
 273 %type const_decl_type {decl_type*}
 274 %destructor const_decl_type {free_decl_type($$);}
 275 const_decl_type(type) ::= decl_type(type_). {
 276         type = type_;
 277 }
 278 const_decl_type(type) ::= CONST decl_type(type_). {
 279         type = type_;
 280 }
 281
 282 %type impl {impl*}
 283 %destructor impl {free_impl($$);}
 284 impl(impl) ::= impl_func(func) LBRACE impl_stmts(stmts) RBRACE. {
 285         impl = init_impl(func, stmts);
 286 }
 287
 288 %type impl_func {impl_func*}
 289 %destructor impl_func {free_impl_func($$);}
 290 impl_func(func) ::= FUNCTION reference(r) NSNAME(NAME) impl_args(args) COLON impl_type(type). {
 291         func = init_impl_func(NAME->text, args, type, r);
 292         free(NAME);
 293 }
 294
 295 %token_class impl_def_val_token NULL NUMBER TRUE FALSE QUOTED_STRING.
 296 %type impl_def_val {impl_def_val*}
 297 %destructor impl_def_val {free_impl_def_val($$);}
 298 impl_def_val(def) ::= impl_def_val_token(T). {
 299         def = init_impl_def_val(T->type, T->text);
 300         free(T);
 301 }
 302
 303 %type impl_var {impl_var*}
 304 %destructor impl_var {free_impl_var($$);}
 305 impl_var(var) ::= reference(r) DOLLAR NAME(T). {
 306         var = init_impl_var(T->text, r);
 307         free(T);
 308 }
 309
 310 %type impl_arg {impl_arg*}
 311 %destructor impl_arg {free_impl_arg($$);}
 312 impl_arg(arg) ::= impl_type(type) impl_var(var). {
 313         arg = init_impl_arg(type, var, NULL);
 314 }
 315 impl_arg(arg) ::= impl_type(type) impl_var(var) EQUALS impl_def_val(def). {
 316         arg = init_impl_arg(type, var, def);
 317 }
 318
 319 %type impl_args {impl_args*}
 320 %destructor impl_args {free_impl_args($$);}
 321 impl_args(args) ::= LPAREN RPAREN. {
 322         args = NULL;
 323 }
 324 impl_args(args) ::= LPAREN impl_arg_list(args_) RPAREN. {
 325         args = args_;
 326 }
 327 impl_args(args) ::= LPAREN impl_arg_list(args_) COMMA impl_vararg(va) RPAREN. {
 328         args = args_;
 329         args->vararg.name = va;
 330 }
 331
 332 %type impl_vararg {impl_arg*}
 333 %destructor impl_vararg {free_impl_arg($$);}
 334 impl_vararg(va) ::= impl_type(type) reference(r) ELLIPSIS DOLLAR NAME(T). {
 335         va = init_impl_arg(type, init_impl_var(T->text, r), NULL);
 336         free(T);
 337 }
 338
 339 %type impl_arg_list {impl_args*}
 340 %destructor impl_arg_list {free_impl_args($$);}
 341 impl_arg_list(args) ::= impl_arg(arg). {
 342         args = init_impl_args(arg);
 343 }
 344 impl_arg_list(args) ::= impl_arg_list(args_) COMMA impl_arg(arg). {
 345         args = add_impl_arg(args_, arg);
 346 }
 347
 348 %type impl_stmts {impl_stmts*}
 349 %destructor impl_stmts {free_impl_stmts($$);}
 350 impl_stmts(stmts) ::= impl_stmt(stmt). {
 351         stmts = init_impl_stmts(stmt);
 352 }
 353 impl_stmts(stmts) ::= impl_stmts(stmts_) impl_stmt(stmt). {
 354         stmts = add_impl_stmt(stmts_, stmt);
 355 }
 356
 357 %type impl_stmt {impl_stmt*}
 358 %destructor impl_stmt {free_impl_stmt($$);}
 359 impl_stmt(stmt) ::= let_stmt(let). {
 360         stmt = init_impl_stmt(PSI_T_LET, let);
 361 }
 362 impl_stmt(stmt) ::= set_stmt(set). {
 363         stmt = init_impl_stmt(PSI_T_SET, set);
 364 }
 365 impl_stmt(stmt) ::= return_stmt(ret). {
 366         stmt = init_impl_stmt(PSI_T_RETURN, ret);
 367 }
 368 impl_stmt(stmt) ::= free_stmt(free). {
 369         stmt = init_impl_stmt(PSI_T_FREE, free);
 370 }
 371
 372 %token_class num_exp_token NUMBER NSNAME.
 373 %token_class num_exp_op_token PLUS MINUS ASTERISK SLASH.
 374 %type num_exp {num_exp*}
 375 %destructor num_exp {free_num_exp($$);}
 376 num_exp(exp) ::= num_exp_token(tok). {
 377         exp = init_num_exp(tok->type, tok->text);
 378         free(tok);
 379 }
 380 num_exp(exp) ::= decl_var(var). {
 381         exp = init_num_exp(PSI_T_NAME, var);
 382 }
 383 num_exp(exp) ::= num_exp(exp_) num_exp_op_token(operator_) num_exp(operand_). {
 384         exp_->operator = operator_->type;
 385         exp_->operand = operand_;
 386         exp = exp_;
 387         free(operator_);
 388 }
 389
 390 %type let_stmt {let_stmt*}
 391 %destructor let_stmt {free_let_stmt($$);}
 392 let_stmt(let) ::= LET decl_var(var) EOS. {
 393         let = init_let_stmt(var, init_let_val(PSI_LET_NULL, NULL));
 394 }
 395 let_stmt(let) ::= LET decl_var(var) EQUALS reference(r) let_val(val) EOS. {
 396         val->flags.one.is_reference = r ? 1 : 0;
 397         let = init_let_stmt(var, val);
 398 }
 399 let_stmt(let) ::= TEMP decl_var(var) EQUALS decl_var(val) EOS. {
 400         let = init_let_stmt(var, init_let_val(PSI_LET_TMP, val));
 401 }
 402
 403 %type let_val {let_val*}
 404 %destructor let_val {free_let_val($$);}
 405 let_val(val) ::= NULL. {
 406         val = init_let_val(PSI_LET_NULL, NULL);
 407 }
 408 let_val(val) ::= num_exp(exp). {
 409         val = init_let_val(PSI_LET_NUMEXP, exp);
 410 }
 411 let_val(val) ::= CALLOC LPAREN let_calloc(alloc) RPAREN. {
 412         val = init_let_val(PSI_LET_CALLOC, alloc);
 413 }
 414 let_val(val) ::= let_func(func). {
 415         val = init_let_val(PSI_LET_FUNC, func);
 416 }
 417
 418 %type let_calloc {let_calloc*}
 419 %destructor let_calloc {free_let_calloc($$);}
 420 let_calloc(alloc) ::= num_exp(nmemb) COMMA num_exp(size). {
 421         alloc = init_let_calloc(nmemb, size);
 422 }
 423 %token_class let_func_token OBJVAL ARRVAL PATHVAL STRLEN STRVAL FLOATVAL INTVAL BOOLVAL.
 424 %type let_func {let_func*}
 425 %destructor let_func {free_let_func($$);}
 426 let_func(func) ::= let_func_token(T) LPAREN impl_var(var) RPAREN. {
 427         func = init_let_func(T->type, T->text, var);
 428         free(T);
 429 }
 430
 431
 432 %type set_stmt {set_stmt*}
 433 %destructor set_stmt {free_set_stmt($$);}
 434 set_stmt(set) ::= SET impl_var(var) EQUALS set_value(val) EOS. {
 435         set = init_set_stmt(var, val);
 436 }
 437
 438 %type set_value {set_value*}
 439 %destructor set_value {free_set_value($$);}
 440 set_value(val) ::= set_func(func) LPAREN decl_var(var) RPAREN. {
 441         val = init_set_value(func, init_decl_vars(var));
 442 }
 443 set_value(val) ::= set_func(func) LPAREN decl_var(var) COMMA num_exp(num_) RPAREN. {
 444         val = init_set_value(func, init_decl_vars(var));
 445         val->num = num_;
 446 }
 447 set_value(val) ::= set_func(func_) LPAREN decl_var(var) COMMA set_vals(vals) RPAREN. {
 448         val = vals;
 449         val->func = func_;
 450         val->vars = init_decl_vars(var);
 451 }
 452 set_value(val) ::= set_func(func_) LPAREN decl_var(var) COMMA num_exp(num_) COMMA set_vals(vals) RPAREN. {
 453         val = vals;
 454         val->func = func_;
 455         val->num = num_;
 456         val->vars = init_decl_vars(var);
 457 }
 458 %type set_vals {set_value*}
 459 %destructor set_vals {free_set_value($$);}
 460 set_vals(vals) ::= set_value(val). {
 461         vals = add_inner_set_value(init_set_value(NULL, NULL), val);
 462 }
 463 set_vals(vals) ::= set_vals(vals_) COMMA set_value(val). {
 464         vals = add_inner_set_value(vals_, val);
 465 }
 466
 467 %token_class set_func_token TO_OBJECT TO_ARRAY TO_STRING TO_INT TO_FLOAT TO_BOOL VOID.
 468 %type set_func {set_func*}
 469 %destructor set_func {free_set_func($$);}
 470 set_func(func) ::= set_func_token(T). {
 471         func = init_set_func(T->type, T->text);
 472         free(T);
 473 }
 474
 475 %type return_stmt {return_stmt*}
 476 %destructor return_stmt {free_return_stmt($$);}
 477 return_stmt(ret) ::= RETURN set_value(val) EOS. {
 478         ret = init_return_stmt(val);
 479 }
 480
 481 %type free_stmt {free_stmt*}
 482 %destructor free_stmt {free_free_stmt($$);}
 483 free_stmt(free) ::= FREE free_calls(calls) EOS. {
 484         free = init_free_stmt(calls);
 485 }
 486
 487 %type free_calls {free_calls*}
 488 %destructor free_calls {free_free_calls($$);}
 489 free_calls(calls) ::= free_call(call). {
 490         calls = init_free_calls(call);
 491 }
 492 free_calls(calls) ::= free_calls(calls_) COMMA free_call(call). {
 493         calls = add_free_call(calls_, call);
 494 }
 495
 496 %type free_call {free_call*}
 497 %destructor free_call {free_free_call($$);}
 498 free_call(call) ::= NAME(F) LPAREN decl_vars(vars) RPAREN. {
 499         call = init_free_call(F->text, vars);
 500         free(F);
 501 }
 502
 503 %token_class impl_type_token VOID MIXED BOOL INT FLOAT STRING ARRAY OBJECT.
 504 %type impl_type {impl_type*}
 505 %destructor impl_type {free_impl_type($$);}
 506 impl_type(type_) ::= impl_type_token(T). {
 507         type_ = init_impl_type(T->type, T->text);
 508         free(T);
 509 }
 510
 511 %type reference {char}
 512 reference(r) ::= . {r = 0;}
 513 reference(r) ::= AMPERSAND. {r = 1;}
 514
 515 %type indirection {unsigned}
 516 indirection(i) ::= . {i = 0;}
 517 indirection(i) ::= pointers(p). {i = p;}
 518
 519 %type pointers {unsigned}
 520 pointers(p) ::= ASTERISK. {p = 1;}
 521 pointers(p) ::= pointers(P) ASTERISK. {p = P+1;}