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

   1 %include {
   2 #include <stddef.h>
   3 #include <assert.h>
   4 #include <stdlib.h>
   5 #include <string.h>
   6 #include <stdarg.h>
   7
   8 #include "parser.h"
   9
  10 void psi_error(int, const char *, int, const char *, ...);
  11 }
  12
  13 %name PSI_ParserProc
  14 %token_prefix PSI_T_
  15 %token_type {PSI_Token *}
  16 %token_destructor {free($$);}
  17 %default_destructor {(void)P;}
  18 %extra_argument {PSI_Parser *P}
  19 /* TOKEN is defined inside syntax_error */
  20 %syntax_error {
  21         ++P->errors;
  22         if (TOKEN && TOKEN->type != PSI_T_EOF) {
  23                 psi_error(PSI_WARNING, TOKEN->file, TOKEN->line, "PSI syntax error: Unexpected token '%s'", TOKEN->text);
  24         } else {
  25                 psi_error(PSI_WARNING, P->psi.file.fn, P->line, "PSI syntax error: Unexpected end of input");
  26         }
  27 }
  28
  29 %nonassoc NAME.
  30 %left PLUS MINUS.
  31 %left SLASH ASTERISK.
  32 %fallback NAME TEMP FREE SET LET RETURN LIB STRING.
  33
  34 file ::= blocks.
  35
  36 blocks ::= block.
  37 blocks ::= blocks block.
  38
  39 block ::= EOF.
  40 block ::= EOS.
  41
  42 block ::= LIB(T) QUOTED_STRING(libname) EOS. {
  43         if (P->psi.file.ln) {
  44                 P->error(T, PSI_WARNING, "Extra 'lib %s' statement has no effect", libname->text);
  45         } else {
  46                 P->psi.file.ln = strndup(libname->text + 1, libname->size - 2);
  47         }
  48         free(libname);
  49         free(T);
  50 }
  51
  52 block ::= decl(decl). {
  53         P->decls = add_decl(P->decls, decl);
  54 }
  55 block ::= impl(impl). {
  56         P->impls = add_impl(P->impls, impl);
  57 }
  58 block ::= decl_typedef(def). {
  59         P->defs = add_decl_typedef(P->defs, def);
  60         if (def->type->strct) {
  61                 P->structs = add_decl_struct(P->structs, def->type->strct);
  62         }
  63 }
  64 block ::= constant(constant). {
  65         P->consts = add_constant(P->consts, constant);
  66 }
  67 block ::= decl_struct(strct). {
  68         P->structs = add_decl_struct(P->structs, strct);
  69 }
  70
  71 struct_name(n) ::= STRUCT NAME(N). {
  72         n = N;
  73 }
  74
  75 %type decl_struct_args {decl_args*}
  76 %destructor decl_struct_args {free_decl_args($$);}
  77 decl_struct_args(args_) ::= LBRACE struct_args(args) RBRACE. {
  78         args_ = args;
  79 }
  80 decl_struct_args(args_) ::= EOS. {
  81         args_ = init_decl_args(NULL);
  82 }
  83
  84
  85 %type decl_struct {decl_struct*}
  86 %destructor decl_struct {free_decl_struct($$);}
  87 decl_struct(strct) ::= struct_name(N) struct_size(size_) decl_struct_args(args). {
  88         strct = init_decl_struct(N->text, args);
  89         strct->size = size_;
  90         strct->token = N;
  91 }
  92
  93 %type struct_size {size_t}
  94 struct_size(size) ::= . {
  95         size = 0;
  96 }
  97 struct_size(size) ::= COLON COLON LPAREN NUMBER(SIZ) RPAREN. {
  98         size = atol(SIZ->text);
  99         free(SIZ);
 100 }
 101
 102 %token_class const_type_token BOOL INT FLOAT STRING.
 103 %type const_type {const_type*}
 104 %destructor const_type {free_const_type($$);}
 105 const_type(type_) ::= const_type_token(T). {
 106         type_ = init_const_type(T->type, T->text);
 107         free(T);
 108 }
 109 %type constant {constant*}
 110 %destructor constant {free_constant($$);}
 111 constant(constant) ::= CONST const_type(type) NSNAME(T) EQUALS impl_def_val(val) EOS. {
 112         constant = init_constant(type, T->text, val);
 113         free(T);
 114 }
 115
 116 %type decl_typedef {decl_typedef*}
 117 %destructor decl_typedef {free_decl_typedef($$);}
 118 decl_typedef(def) ::= TYPEDEF decl_typedef_body(def_) EOS. {
 119         def = def_;
 120 }
 121 %type decl_typedef_body {decl_typedef*}
 122 %destructor decl_typedef_body {free_decl_typedef($$);}
 123 decl_typedef_body(def) ::= decl_type(type) NAME(ALIAS). {
 124         def = init_decl_typedef(ALIAS->text, type);
 125         def->token = ALIAS;
 126 }
 127
 128 /* support opaque types */
 129 decl_typedef_body(def) ::= VOID(V) indirection(i) NAME(ALIAS). {
 130         def = init_decl_typedef(ALIAS->text, init_decl_type(i?PSI_T_POINTER:V->type, V->text));
 131         def->token = ALIAS;
 132         def->type->token = V;
 133 }
 134
 135 %type decl {decl*}
 136 %destructor decl {free_decl($$);}
 137 decl(decl) ::= decl_abi(abi) decl_func(func) LPAREN decl_args(args) RPAREN EOS. {
 138         decl = init_decl(abi, func, args);
 139 }
 140
 141 %type decl_func {decl_arg*}
 142 %destructor decl_func {free_decl_arg($$);}
 143 decl_func(func) ::= decl_arg(arg). {
 144         func = arg;
 145 }
 146 /* special case for void functions */
 147 decl_func(func) ::= VOID(T) NAME(N). {
 148         func = init_decl_arg(
 149                 init_decl_type(T->type, T->text),
 150                 init_decl_var(N->text, 0, 0)
 151         );
 152         func->type->token = T;
 153         //free(T);
 154         free(N);
 155 }
 156
 157 %type decl_abi {decl_abi*}
 158 %destructor decl_abi {free_decl_abi($$);}
 159 decl_abi(abi) ::= NAME(T). {
 160         abi = init_decl_abi(T->text);
 161         abi->token = T;
 162 }
 163
 164 %type decl_var {decl_var*}
 165 %destructor decl_var {free_decl_var($$);}
 166 decl_var(var) ::= indirection(p) NAME(T). {
 167         var = init_decl_var(T->text, p, 0);
 168         var->token = T;
 169 }
 170 decl_var(var) ::= indirection(p) NAME(T) LBRACKET NUMBER(D) RBRACKET. {
 171         var = init_decl_var(T->text, p+1, atol(D->text));
 172         var->token = T;
 173         free(D);
 174 }
 175
 176 %type decl_vars {decl_vars*}
 177 %destructor decl_vars {free_decl_vars($$);}
 178 decl_vars(vars) ::= decl_var(var). {
 179         vars = init_decl_vars(var);
 180 }
 181 decl_vars(vars) ::= decl_vars(vars_) COMMA decl_var(var). {
 182         vars = add_decl_var(vars_, var);
 183 }
 184
 185 %type decl_arg {decl_arg*}
 186 %destructor decl_arg {free_decl_arg($$);}
 187 decl_arg(arg_) ::= const_decl_type(type) decl_var(var). {
 188         arg_ = init_decl_arg(type, var);
 189 }
 190 /* void pointers need a specific rule */
 191 decl_arg(arg_) ::= VOID(T) pointers(p) NAME(N). {
 192         arg_ = init_decl_arg(
 193                 init_decl_type(T->type, T->text),
 194                 init_decl_var(N->text, p, 0)
 195         );
 196         arg_->type->token = T;
 197         arg_->var->token = N;
 198         arg_->token = N;
 199 }
 200 decl_arg(arg_) ::= CONST VOID(T) pointers(p) NAME(N). {
 201         arg_ = init_decl_arg(
 202                 init_decl_type(T->type, T->text),
 203                 init_decl_var(N->text, p, 0)
 204         );
 205         arg_->type->token = T;
 206         arg_->var->token = N;
 207         arg_->token = N;
 208 }
 209
 210 %type decl_args {decl_args*}
 211 %destructor decl_args {free_decl_args($$);}
 212 decl_args ::= .
 213 decl_args ::= VOID.
 214 decl_args(args) ::= decl_arg(arg). {
 215         args = init_decl_args(arg);
 216 }
 217 decl_args(args) ::= decl_args(args_) COMMA decl_arg(arg). {
 218         args = add_decl_arg(args_, arg);
 219 }
 220 decl_args(args) ::= decl_args(args_) COMMA ELLIPSIS. {
 221         args = args_;
 222         args->varargs = 1;
 223 }
 224 %type struct_args {decl_args*}
 225 %destructor struct_args {free_decl_args($$);}
 226 struct_args(args) ::= struct_arg(arg). {
 227         args = init_decl_args(arg);
 228 }
 229 struct_args(args) ::= struct_args(args_) struct_arg(arg). {
 230         args = add_decl_arg(args_, arg);
 231 }
 232 %type struct_arg {decl_arg*}
 233 %destructor struct_arg {free_decl_arg($$);}
 234 struct_arg(arg) ::= decl_arg(arg_) struct_layout(layout_) EOS. {
 235         arg_->layout = layout_;
 236         arg = arg_;
 237 }
 238
 239 %type struct_layout {decl_struct_layout*}
 240 %destructor struct_layout {free_decl_struct_layout($$);}
 241 struct_layout(layout) ::= . {
 242         layout = NULL;
 243 }
 244 struct_layout(layout) ::= COLON COLON LPAREN NUMBER(POS) COMMA NUMBER(SIZ) RPAREN. {
 245         layout = init_decl_struct_layout(atol(POS->text), atol(SIZ->text));
 246         free(POS);
 247         free(SIZ);
 248 }
 249
 250 /* un/signed, urgh */
 251 decl_scalar_type(type_) ::= CHAR(C). {
 252         type_ = C;
 253 }
 254 decl_scalar_type(type_) ::= SHORT(S) decl_scalar_type_short(s). {
 255         if (s) {
 256                 type_ = PSI_TokenCat(2, S, s);
 257                 free(S);
 258                 free(s);
 259         } else {
 260                 type_ = S;
 261         }
 262 }
 263 decl_scalar_type_short(s) ::= . {
 264         s = NULL;
 265 }
 266
 267 decl_scalar_type_short(s) ::= INT(I). {
 268         s = I;
 269 }
 270 decl_scalar_type(type_) ::= INT(I). {
 271         type_ = I;
 272 }
 273 decl_scalar_type(type_) ::= LONG(L) decl_scalar_type_long(l). {
 274         if (l) {
 275                 type_ = PSI_TokenCat(2, L, l);
 276                 free(L);
 277                 free(l);
 278         } else {
 279                 type_ = L;
 280         }
 281 }
 282 decl_scalar_type_long(l) ::= . {
 283         l = NULL;
 284 }
 285 decl_scalar_type_long(l) ::= DOUBLE(D). {
 286         l = D;
 287 }
 288 decl_scalar_type_long(l) ::= LONG(L) decl_scalar_type_long_long(ll). {
 289         if (ll) {
 290                 l = PSI_TokenCat(2, L, ll);
 291                 free(L);
 292                 free(ll);
 293         } else {
 294                 l = L;
 295         }
 296 }
 297 decl_scalar_type_long_long(ll) ::= . {
 298         ll = NULL;
 299 }
 300 decl_scalar_type_long_long(ll) ::= INT(I). {
 301         ll = I;
 302 }
 303 decl_type(type_) ::= UNSIGNED(U) decl_scalar_type(N). {
 304         PSI_Token *T = PSI_TokenCat(2, U, N);
 305         type_ = init_decl_type(T->type, T->text);
 306         type_->token = T;
 307         free(U);
 308         free(N);
 309 }
 310 decl_type(type_) ::= SIGNED(S) decl_scalar_type(N). {
 311         PSI_Token *T = PSI_TokenCat(2, S, N);
 312         type_ = init_decl_type(T->type, T->text);
 313         type_->token = T;
 314         free(S);
 315         free(N);
 316 }
 317 decl_type(type_) ::= UNSIGNED(U). {
 318         type_ = init_decl_type(PSI_T_NAME, U->text);
 319         type_->token = U;
 320 }
 321 decl_type(type_) ::= SIGNED(S). {
 322         type_ = init_decl_type(PSI_T_NAME, S->text);
 323         type_->token = S;
 324 }
 325 decl_type(type_) ::= decl_scalar_type(N). {
 326         type_ = init_decl_type(N->type, N->text);
 327         type_->token = N;
 328 }
 329 /* structs ! */
 330 decl_type(type_) ::= STRUCT(S) NAME(T). {
 331         type_ = init_decl_type(S->type, T->text);
 332         type_->token = T;
 333         free(S);
 334 }
 335 %token_class decl_type_token FLOAT DOUBLE INT8 UINT8 INT16 UINT16 INT32 UINT32 INT64 UINT64 NAME.
 336 %type decl_type {decl_type*}
 337 %destructor decl_type {free_decl_type($$);}
 338 decl_type(type_) ::= decl_type_token(T). {
 339         type_ = init_decl_type(T->type, T->text);
 340         type_->token = T;
 341 }
 342
 343
 344 %type const_decl_type {decl_type*}
 345 %destructor const_decl_type {free_decl_type($$);}
 346 const_decl_type(type) ::= decl_type(type_). {
 347         type = type_;
 348 }
 349 const_decl_type(type) ::= CONST decl_type(type_). {
 350         type = type_;
 351 }
 352
 353 %type impl {impl*}
 354 %destructor impl {free_impl($$);}
 355 impl(impl) ::= impl_func(func) LBRACE impl_stmts(stmts) RBRACE. {
 356         impl = init_impl(func, stmts);
 357 }
 358
 359 %type impl_func {impl_func*}
 360 %destructor impl_func {free_impl_func($$);}
 361 impl_func(func) ::= FUNCTION reference(r) NSNAME(NAME) impl_args(args) COLON impl_type(type). {
 362         func = init_impl_func(NAME->text, args, type, r);
 363         func->token = NAME;
 364 }
 365
 366 %token_class impl_def_val_token NULL NUMBER TRUE FALSE QUOTED_STRING.
 367 %type impl_def_val {impl_def_val*}
 368 %destructor impl_def_val {free_impl_def_val($$);}
 369 impl_def_val(def) ::= impl_def_val_token(T). {
 370         def = init_impl_def_val(T->type, T->text);
 371         free(T);
 372 }
 373
 374 %type impl_var {impl_var*}
 375 %destructor impl_var {free_impl_var($$);}
 376 impl_var(var) ::= reference(r) DOLLAR NAME(T). {
 377         var = init_impl_var(T->text, r);
 378         var->token = T;
 379 }
 380
 381 %type impl_arg {impl_arg*}
 382 %destructor impl_arg {free_impl_arg($$);}
 383 impl_arg(arg) ::= impl_type(type) impl_var(var). {
 384         arg = init_impl_arg(type, var, NULL);
 385 }
 386 impl_arg(arg) ::= impl_type(type) impl_var(var) EQUALS impl_def_val(def). {
 387         arg = init_impl_arg(type, var, def);
 388 }
 389
 390 %type impl_args {impl_args*}
 391 %destructor impl_args {free_impl_args($$);}
 392 impl_args(args) ::= LPAREN RPAREN. {
 393         args = NULL;
 394 }
 395 impl_args(args) ::= LPAREN impl_arg_list(args_) RPAREN. {
 396         args = args_;
 397 }
 398 impl_args(args) ::= LPAREN impl_arg_list(args_) COMMA impl_vararg(va) RPAREN. {
 399         args = args_;
 400         args->vararg.name = va;
 401 }
 402
 403 %type impl_vararg {impl_arg*}
 404 %destructor impl_vararg {free_impl_arg($$);}
 405 impl_vararg(va) ::= impl_type(type) reference(r) ELLIPSIS DOLLAR NAME(T). {
 406         va = init_impl_arg(type, init_impl_var(T->text, r), NULL);
 407         free(T);
 408 }
 409
 410 %type impl_arg_list {impl_args*}
 411 %destructor impl_arg_list {free_impl_args($$);}
 412 impl_arg_list(args) ::= impl_arg(arg). {
 413         args = init_impl_args(arg);
 414 }
 415 impl_arg_list(args) ::= impl_arg_list(args_) COMMA impl_arg(arg). {
 416         args = add_impl_arg(args_, arg);
 417 }
 418
 419 %type impl_stmts {impl_stmts*}
 420 %destructor impl_stmts {free_impl_stmts($$);}
 421 impl_stmts(stmts) ::= impl_stmt(stmt). {
 422         stmts = init_impl_stmts(stmt);
 423 }
 424 impl_stmts(stmts) ::= impl_stmts(stmts_) impl_stmt(stmt). {
 425         stmts = add_impl_stmt(stmts_, stmt);
 426 }
 427
 428 %type impl_stmt {impl_stmt*}
 429 %destructor impl_stmt {free_impl_stmt($$);}
 430 impl_stmt(stmt) ::= let_stmt(let). {
 431         stmt = init_impl_stmt(PSI_T_LET, let);
 432 }
 433 impl_stmt(stmt) ::= set_stmt(set). {
 434         stmt = init_impl_stmt(PSI_T_SET, set);
 435 }
 436 impl_stmt(stmt) ::= return_stmt(ret). {
 437         stmt = init_impl_stmt(PSI_T_RETURN, ret);
 438 }
 439 impl_stmt(stmt) ::= free_stmt(free). {
 440         stmt = init_impl_stmt(PSI_T_FREE, free);
 441 }
 442
 443 %token_class num_exp_token NUMBER NSNAME.
 444 %token_class num_exp_op_token PLUS MINUS ASTERISK SLASH.
 445 %type num_exp {num_exp*}
 446 %destructor num_exp {free_num_exp($$);}
 447 num_exp(exp) ::= num_exp_token(tok). {
 448         exp = init_num_exp(tok->type, tok->text);
 449         exp->token = tok;
 450 }
 451 num_exp(exp) ::= decl_var(var). {
 452         exp = init_num_exp(PSI_T_NAME, var);
 453         exp->token = PSI_TokenCopy(var->token);
 454 }
 455 num_exp(exp) ::= num_exp(exp_) num_exp_op_token(operator_) num_exp(operand_). {
 456         exp_->operator = operator_->type;
 457         exp_->operand = operand_;
 458         exp = exp_;
 459         free(operator_);
 460 }
 461
 462 %type let_stmt {let_stmt*}
 463 %destructor let_stmt {free_let_stmt($$);}
 464 let_stmt(let) ::= LET decl_var(var) EOS. {
 465         let = init_let_stmt(var, init_let_val(PSI_LET_NULL, NULL));
 466 }
 467 let_stmt(let) ::= LET decl_var(var) EQUALS reference(r) let_val(val) EOS. {
 468         val->flags.one.is_reference = r ? 1 : 0;
 469         let = init_let_stmt(var, val);
 470 }
 471 let_stmt(let) ::= TEMP decl_var(var) EQUALS decl_var(val) EOS. {
 472         let = init_let_stmt(var, init_let_val(PSI_LET_TMP, val));
 473 }
 474
 475 %type let_val {let_val*}
 476 %destructor let_val {free_let_val($$);}
 477 let_val(val) ::= NULL. {
 478         val = init_let_val(PSI_LET_NULL, NULL);
 479 }
 480 let_val(val) ::= num_exp(exp). {
 481         val = init_let_val(PSI_LET_NUMEXP, exp);
 482 }
 483 let_val(val) ::= CALLOC LPAREN let_calloc(alloc) RPAREN. {
 484         val = init_let_val(PSI_LET_CALLOC, alloc);
 485 }
 486 let_val(val) ::= let_func(func). {
 487         val = init_let_val(PSI_LET_FUNC, func);
 488 }
 489
 490 %type let_calloc {let_calloc*}
 491 %destructor let_calloc {free_let_calloc($$);}
 492 let_calloc(alloc) ::= num_exp(nmemb) COMMA num_exp(size). {
 493         alloc = init_let_calloc(nmemb, size);
 494 }
 495 %token_class let_func_token OBJVAL ARRVAL PATHVAL STRLEN STRVAL FLOATVAL INTVAL BOOLVAL.
 496 %type let_func {let_func*}
 497 %destructor let_func {free_let_func($$);}
 498 let_func(func) ::= let_func_token(T) LPAREN impl_var(var) RPAREN. {
 499         func = init_let_func(T->type, T->text, var);
 500         free(T);
 501 }
 502
 503
 504 %type set_stmt {set_stmt*}
 505 %destructor set_stmt {free_set_stmt($$);}
 506 set_stmt(set) ::= SET impl_var(var) EQUALS set_value(val) EOS. {
 507         set = init_set_stmt(var, val);
 508 }
 509
 510 %type set_value {set_value*}
 511 %destructor set_value {free_set_value($$);}
 512 set_value(val) ::= set_func(func) LPAREN decl_var(var) RPAREN. {
 513         val = init_set_value(func, init_decl_vars(var));
 514 }
 515 set_value(val) ::= set_func(func) LPAREN decl_var(var) COMMA num_exp(num_) RPAREN. {
 516         val = init_set_value(func, init_decl_vars(var));
 517         val->num = num_;
 518 }
 519 set_value(val) ::= set_func(func_) LPAREN decl_var(var) COMMA ELLIPSIS(T) RPAREN. {
 520         free_set_func(func_);
 521         val = init_set_value(init_set_func(T->type, T->text), init_decl_vars(var));
 522         val->func->token = T;
 523 }
 524 set_value(val) ::= set_func(func_) LPAREN decl_var(var) COMMA set_vals(vals) RPAREN. {
 525         val = vals;
 526         val->func = func_;
 527         val->vars = init_decl_vars(var);
 528 }
 529 set_value(val) ::= set_func(func_) LPAREN decl_var(var) COMMA num_exp(num_) COMMA set_vals(vals) RPAREN. {
 530         val = vals;
 531         val->func = func_;
 532         val->num = num_;
 533         val->vars = init_decl_vars(var);
 534 }
 535 %type set_vals {set_value*}
 536 %destructor set_vals {free_set_value($$);}
 537 set_vals(vals) ::= set_value(val). {
 538         vals = add_inner_set_value(init_set_value(NULL, NULL), val);
 539 }
 540 set_vals(vals) ::= set_vals(vals_) COMMA set_value(val). {
 541         vals = add_inner_set_value(vals_, val);
 542 }
 543
 544 %token_class set_func_token TO_OBJECT TO_ARRAY TO_STRING TO_INT TO_FLOAT TO_BOOL VOID.
 545 %type set_func {set_func*}
 546 %destructor set_func {free_set_func($$);}
 547 set_func(func) ::= set_func_token(T). {
 548         func = init_set_func(T->type, T->text);
 549         func->token = T;
 550 }
 551
 552 %type return_stmt {return_stmt*}
 553 %destructor return_stmt {free_return_stmt($$);}
 554 return_stmt(ret) ::= RETURN(T) set_value(val) EOS. {
 555         ret = init_return_stmt(val);
 556         ret->token = T;
 557 }
 558
 559 %type free_stmt {free_stmt*}
 560 %destructor free_stmt {free_free_stmt($$);}
 561 free_stmt(free) ::= FREE free_calls(calls) EOS. {
 562         free = init_free_stmt(calls);
 563 }
 564
 565 %type free_calls {free_calls*}
 566 %destructor free_calls {free_free_calls($$);}
 567 free_calls(calls) ::= free_call(call). {
 568         calls = init_free_calls(call);
 569 }
 570 free_calls(calls) ::= free_calls(calls_) COMMA free_call(call). {
 571         calls = add_free_call(calls_, call);
 572 }
 573
 574 %type free_call {free_call*}
 575 %destructor free_call {free_free_call($$);}
 576 free_call(call) ::= NAME(F) LPAREN decl_vars(vars) RPAREN. {
 577         call = init_free_call(F->text, vars);
 578         call->token = F;
 579 }
 580
 581 %token_class impl_type_token VOID MIXED BOOL INT FLOAT STRING ARRAY OBJECT.
 582 %type impl_type {impl_type*}
 583 %destructor impl_type {free_impl_type($$);}
 584 impl_type(type_) ::= impl_type_token(T). {
 585         type_ = init_impl_type(T->type, T->text);
 586         free(T);
 587 }
 588
 589 %type reference {char}
 590 reference(r) ::= . {r = 0;}
 591 reference(r) ::= AMPERSAND. {r = 1;}
 592
 593 %type indirection {unsigned}
 594 indirection(i) ::= . {i = 0;}
 595 indirection(i) ::= pointers(p). {i = p;}
 596
 597 %type pointers {unsigned}
 598 pointers(p) ::= ASTERISK. {p = 1;}
 599 pointers(p) ::= pointers(P) ASTERISK. {p = P+1;}