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 #include <stdarg.h>
   6
   7 #include "parser.h"
   8
   9 void psi_error(int, const char *, int, const char *, ...);
  10 }
  11
  12 %name PSI_ParserProc
  13 %token_prefix PSI_T_
  14 %token_type {PSI_Token *}
  15 %token_destructor {free($$);}
  16 %default_destructor {(void)P;}
  17 %extra_argument {PSI_Parser *P}
  18 /* TOKEN is defined inside syntax_error */
  19 %syntax_error {
  20         ++P->errors;
  21         if (TOKEN && TOKEN->type != PSI_T_EOF) {
  22                 psi_error(PSI_WARNING, TOKEN->file, *TOKEN->line, "PSI syntax error: Unexpected token '%s'", TOKEN->text);
  23         } else {
  24                 psi_error(PSI_WARNING, P->psi.file.fn, P->line, "PSI syntax error: Unexpected end of input");
  25         }
  26 }
  27
  28 %nonassoc NAME.
  29 %left PLUS MINUS.
  30 %left SLASH ASTERISK.
  31 %fallback NAME TEMP FREE SET LET RETURN LIB INT LONG SIGNED UNSIGNED.
  32
  33 file ::= blocks.
  34
  35 blocks ::= block.
  36 blocks ::= blocks block.
  37
  38 block ::= EOF.
  39
  40 block ::= LIB(T) QUOTED_STRING(libname) EOS. {
  41         if (P->psi.file.ln) {
  42                 P->error(T, PSI_WARNING, "Extra 'lib %s' statement has no effect", libname->text);
  43         } else {
  44                 P->psi.file.ln = strndup(libname->text + 1, libname->size - 2);
  45         }
  46         free(libname);
  47         free(T);
  48 }
  49
  50 block ::= decl(decl). {
  51         P->decls = add_decl(P->decls, decl);
  52 }
  53 block ::= impl(impl). {
  54         P->impls = add_impl(P->impls, impl);
  55 }
  56 block ::= decl_typedef(def). {
  57         P->defs = add_decl_typedef(P->defs, def);
  58         if (def->type->strct) {
  59                 P->structs = add_decl_struct(P->structs, def->type->strct);
  60         }
  61 }
  62 block ::= constant(constant). {
  63         P->consts = add_constant(P->consts, constant);
  64 }
  65 block ::= decl_struct(strct). {
  66         P->structs = add_decl_struct(P->structs, strct);
  67 }
  68
  69 %type decl_struct {decl_struct*}
  70 %destructor decl_struct {free_decl_struct($$);}
  71 decl_struct(strct) ::= STRUCT NAME(N) struct_size(size_) LBRACE struct_args(args) RBRACE. {
  72         strct = init_decl_struct(N->text, args);
  73         strct->size = size_;
  74         strct->token = N;
  75 }
  76
  77 %type struct_size {size_t}
  78 struct_size(size) ::= . {
  79         size = 0;
  80 }
  81 struct_size(size) ::= COLON COLON LPAREN NUMBER(SIZ) RPAREN. {
  82         size = atol(SIZ->text);
  83         free(SIZ);
  84 }
  85
  86 %token_class const_type_token BOOL INT FLOAT STRING.
  87 %type const_type {const_type*}
  88 %destructor const_type {free_const_type($$);}
  89 const_type(type_) ::= const_type_token(T). {
  90         type_ = init_const_type(T->type, T->text);
  91         free(T);
  92 }
  93 %type constant {constant*}
  94 %destructor constant {free_constant($$);}
  95 constant(constant) ::= CONST const_type(type) NSNAME(T) EQUALS impl_def_val(val) EOS. {
  96         constant = init_constant(type, T->text, val);
  97         free(T);
  98 }
  99
 100 %type decl_typedef {decl_typedef*}
 101 %destructor decl_typedef {free_decl_typedef($$);}
 102 decl_typedef(def) ::= TYPEDEF decl_type(type) NAME(ALIAS) EOS. {
 103         def = init_decl_typedef(ALIAS->text, type);
 104         def->token = ALIAS;
 105 }
 106 /* support opaque types */
 107 decl_typedef(def) ::= TYPEDEF VOID(V) NAME(ALIAS) EOS. {
 108         def = init_decl_typedef(ALIAS->text, init_decl_type(V->type, V->text));
 109         def->token = ALIAS;
 110         def->type->token = V;
 111 }
 112 decl_typedef(def) ::= TYPEDEF STRUCT(S) NAME(N) NAME(ALIAS) EOS. {
 113         def = init_decl_typedef(ALIAS->text, init_decl_type(S->type, N->text));
 114         def->token = ALIAS;
 115         def->type->token = N;
 116         free(S);
 117 }
 118 decl_typedef(def) ::= TYPEDEF decl_struct(s) NAME(ALIAS) EOS. {
 119         def = init_decl_typedef(ALIAS->text, init_decl_type(PSI_T_STRUCT, s->name));
 120         def->token = ALIAS;
 121         def->type->token = PSI_TokenCopy(s->token);
 122         def->type->strct = s;
 123 }
 124
 125 %type decl {decl*}
 126 %destructor decl {free_decl($$);}
 127 decl(decl) ::= decl_abi(abi) decl_func(func) LPAREN decl_args(args) RPAREN EOS. {
 128         decl = init_decl(abi, func, args);
 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         abi->token = T;
 152 }
 153
 154 %type decl_var {decl_var*}
 155 %destructor decl_var {free_decl_var($$);}
 156 decl_var(var) ::= indirection(p) NAME(T). {
 157         var = init_decl_var(T->text, p, 0);
 158         var->token = T;
 159 }
 160 decl_var(var) ::= indirection(p) NAME(T) LBRACKET NUMBER(D) RBRACKET. {
 161         var = init_decl_var(T->text, p+1, atol(D->text));
 162         var->token = T;
 163         free(D);
 164 }
 165
 166 %type decl_vars {decl_vars*}
 167 %destructor decl_vars {free_decl_vars($$);}
 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($$);}
 177 decl_arg(arg_) ::= const_decl_type(type) decl_var(var). {
 178         arg_ = init_decl_arg(type, var);
 179 }
 180 /* void pointers need a specific rule */
 181 decl_arg(arg_) ::= VOID(T) pointers(p) NAME(N). {
 182         arg_ = init_decl_arg(
 183                 init_decl_type(T->type, T->text),
 184                 init_decl_var(N->text, p, 0)
 185         );
 186         arg_->type->token = T;
 187         arg_->var->token = N;
 188         arg_->token = N;
 189 }
 190 decl_arg(arg_) ::= CONST VOID(T) pointers(p) NAME(N). {
 191         arg_ = init_decl_arg(
 192                 init_decl_type(T->type, T->text),
 193                 init_decl_var(N->text, p, 0)
 194         );
 195         arg_->type->token = T;
 196         arg_->var->token = N;
 197         arg_->token = N;
 198 }
 199
 200 %type decl_args {decl_args*}
 201 %destructor decl_args {free_decl_args($$);}
 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 }
 247 /* unsigned, urgh */
 248 decl_type(type_) ::= UNSIGNED(U) NAME(N). {
 249         PSI_Token *T = PSI_TokenCat(2, U, N);
 250         type_ = init_decl_type(T->type, T->text);
 251         type_->token = T;
 252         free(U);
 253         free(N);
 254 }
 255 decl_type(type_) ::= SIGNED NAME(T). {
 256         type_ = init_decl_type(T->type, T->text);
 257         type_->token = T;
 258         type_->name = realloc(type_->name, T->size + sizeof("signed"));
 259         memmove(type_->name + sizeof("signed"), type_->name, T->size);
 260         memcpy(type_->name, "signed", sizeof("signed")-1);
 261         type_->name[sizeof("signed")] = ' ';
 262         type_->name[T->size + sizeof("signed")] = 0;
 263 }
 264 /* we have to support plain int, long here because we have it in our lexer rules */
 265 decl_type(type_) ::= INT(T). {
 266         type_ = init_decl_type(PSI_T_NAME, T->text);
 267         type_->token = T;
 268 }
 269 decl_type(type_) ::= LONG INT(T). {
 270         type_ = init_decl_type(PSI_T_NAME, T->text);
 271         type_->token = T;
 272 }
 273 /* structs ! */
 274 decl_type(type_) ::= STRUCT(S) NAME(T). {
 275         type_ = init_decl_type(S->type, T->text);
 276         type_->token = T;
 277         free(S);
 278 }
 279
 280 %type const_decl_type {decl_type*}
 281 %destructor const_decl_type {free_decl_type($$);}
 282 const_decl_type(type) ::= decl_type(type_). {
 283         type = type_;
 284 }
 285 const_decl_type(type) ::= CONST decl_type(type_). {
 286         type = type_;
 287 }
 288
 289 %type impl {impl*}
 290 %destructor impl {free_impl($$);}
 291 impl(impl) ::= impl_func(func) LBRACE impl_stmts(stmts) RBRACE. {
 292         impl = init_impl(func, stmts);
 293 }
 294
 295 %type impl_func {impl_func*}
 296 %destructor impl_func {free_impl_func($$);}
 297 impl_func(func) ::= FUNCTION reference(r) NSNAME(NAME) impl_args(args) COLON impl_type(type). {
 298         func = init_impl_func(NAME->text, args, type, r);
 299         func->token = NAME;
 300 }
 301
 302 %token_class impl_def_val_token NULL NUMBER TRUE FALSE QUOTED_STRING.
 303 %type impl_def_val {impl_def_val*}
 304 %destructor impl_def_val {free_impl_def_val($$);}
 305 impl_def_val(def) ::= impl_def_val_token(T). {
 306         def = init_impl_def_val(T->type, T->text);
 307         free(T);
 308 }
 309
 310 %type impl_var {impl_var*}
 311 %destructor impl_var {free_impl_var($$);}
 312 impl_var(var) ::= reference(r) DOLLAR NAME(T). {
 313         var = init_impl_var(T->text, r);
 314         var->token = T;
 315 }
 316
 317 %type impl_arg {impl_arg*}
 318 %destructor impl_arg {free_impl_arg($$);}
 319 impl_arg(arg) ::= impl_type(type) impl_var(var). {
 320         arg = init_impl_arg(type, var, NULL);
 321 }
 322 impl_arg(arg) ::= impl_type(type) impl_var(var) EQUALS impl_def_val(def). {
 323         arg = init_impl_arg(type, var, def);
 324 }
 325
 326 %type impl_args {impl_args*}
 327 %destructor impl_args {free_impl_args($$);}
 328 impl_args(args) ::= LPAREN RPAREN. {
 329         args = NULL;
 330 }
 331 impl_args(args) ::= LPAREN impl_arg_list(args_) RPAREN. {
 332         args = args_;
 333 }
 334 impl_args(args) ::= LPAREN impl_arg_list(args_) COMMA impl_vararg(va) RPAREN. {
 335         args = args_;
 336         args->vararg.name = va;
 337 }
 338
 339 %type impl_vararg {impl_arg*}
 340 %destructor impl_vararg {free_impl_arg($$);}
 341 impl_vararg(va) ::= impl_type(type) reference(r) ELLIPSIS DOLLAR NAME(T). {
 342         va = init_impl_arg(type, init_impl_var(T->text, r), NULL);
 343         free(T);
 344 }
 345
 346 %type impl_arg_list {impl_args*}
 347 %destructor impl_arg_list {free_impl_args($$);}
 348 impl_arg_list(args) ::= impl_arg(arg). {
 349         args = init_impl_args(arg);
 350 }
 351 impl_arg_list(args) ::= impl_arg_list(args_) COMMA impl_arg(arg). {
 352         args = add_impl_arg(args_, arg);
 353 }
 354
 355 %type impl_stmts {impl_stmts*}
 356 %destructor impl_stmts {free_impl_stmts($$);}
 357 impl_stmts(stmts) ::= impl_stmt(stmt). {
 358         stmts = init_impl_stmts(stmt);
 359 }
 360 impl_stmts(stmts) ::= impl_stmts(stmts_) impl_stmt(stmt). {
 361         stmts = add_impl_stmt(stmts_, stmt);
 362 }
 363
 364 %type impl_stmt {impl_stmt*}
 365 %destructor impl_stmt {free_impl_stmt($$);}
 366 impl_stmt(stmt) ::= let_stmt(let). {
 367         stmt = init_impl_stmt(PSI_T_LET, let);
 368 }
 369 impl_stmt(stmt) ::= set_stmt(set). {
 370         stmt = init_impl_stmt(PSI_T_SET, set);
 371 }
 372 impl_stmt(stmt) ::= return_stmt(ret). {
 373         stmt = init_impl_stmt(PSI_T_RETURN, ret);
 374 }
 375 impl_stmt(stmt) ::= free_stmt(free). {
 376         stmt = init_impl_stmt(PSI_T_FREE, free);
 377 }
 378
 379 %token_class num_exp_token NUMBER NSNAME.
 380 %token_class num_exp_op_token PLUS MINUS ASTERISK SLASH.
 381 %type num_exp {num_exp*}
 382 %destructor num_exp {free_num_exp($$);}
 383 num_exp(exp) ::= num_exp_token(tok). {
 384         exp = init_num_exp(tok->type, tok->text);
 385         exp->token = tok;
 386 }
 387 num_exp(exp) ::= decl_var(var). {
 388         exp = init_num_exp(PSI_T_NAME, var);
 389         exp->token = PSI_TokenCopy(var->token);
 390 }
 391 num_exp(exp) ::= num_exp(exp_) num_exp_op_token(operator_) num_exp(operand_). {
 392         exp_->operator = operator_->type;
 393         exp_->operand = operand_;
 394         exp = exp_;
 395         free(operator_);
 396 }
 397
 398 %type let_stmt {let_stmt*}
 399 %destructor let_stmt {free_let_stmt($$);}
 400 let_stmt(let) ::= LET decl_var(var) EOS. {
 401         let = init_let_stmt(var, init_let_val(PSI_LET_NULL, NULL));
 402 }
 403 let_stmt(let) ::= LET decl_var(var) EQUALS reference(r) let_val(val) EOS. {
 404         val->flags.one.is_reference = r ? 1 : 0;
 405         let = init_let_stmt(var, val);
 406 }
 407 let_stmt(let) ::= TEMP decl_var(var) EQUALS decl_var(val) EOS. {
 408         let = init_let_stmt(var, init_let_val(PSI_LET_TMP, val));
 409 }
 410
 411 %type let_val {let_val*}
 412 %destructor let_val {free_let_val($$);}
 413 let_val(val) ::= NULL. {
 414         val = init_let_val(PSI_LET_NULL, NULL);
 415 }
 416 let_val(val) ::= num_exp(exp). {
 417         val = init_let_val(PSI_LET_NUMEXP, exp);
 418 }
 419 let_val(val) ::= CALLOC LPAREN let_calloc(alloc) RPAREN. {
 420         val = init_let_val(PSI_LET_CALLOC, alloc);
 421 }
 422 let_val(val) ::= let_func(func). {
 423         val = init_let_val(PSI_LET_FUNC, func);
 424 }
 425
 426 %type let_calloc {let_calloc*}
 427 %destructor let_calloc {free_let_calloc($$);}
 428 let_calloc(alloc) ::= num_exp(nmemb) COMMA num_exp(size). {
 429         alloc = init_let_calloc(nmemb, size);
 430 }
 431 %token_class let_func_token OBJVAL ARRVAL PATHVAL STRLEN STRVAL FLOATVAL INTVAL BOOLVAL.
 432 %type let_func {let_func*}
 433 %destructor let_func {free_let_func($$);}
 434 let_func(func) ::= let_func_token(T) LPAREN impl_var(var) RPAREN. {
 435         func = init_let_func(T->type, T->text, var);
 436         free(T);
 437 }
 438
 439
 440 %type set_stmt {set_stmt*}
 441 %destructor set_stmt {free_set_stmt($$);}
 442 set_stmt(set) ::= SET impl_var(var) EQUALS set_value(val) EOS. {
 443         set = init_set_stmt(var, val);
 444 }
 445
 446 %type set_value {set_value*}
 447 %destructor set_value {free_set_value($$);}
 448 set_value(val) ::= set_func(func) LPAREN decl_var(var) RPAREN. {
 449         val = init_set_value(func, init_decl_vars(var));
 450 }
 451 set_value(val) ::= set_func(func) LPAREN decl_var(var) COMMA num_exp(num_) RPAREN. {
 452         val = init_set_value(func, init_decl_vars(var));
 453         val->num = num_;
 454 }
 455 set_value(val) ::= set_func(func_) LPAREN decl_var(var) COMMA ELLIPSIS(T) RPAREN. {
 456         free_set_func(func_);
 457         val = init_set_value(init_set_func(T->type, T->text), init_decl_vars(var));
 458         val->func->token = T;
 459 }
 460 set_value(val) ::= set_func(func_) LPAREN decl_var(var) COMMA set_vals(vals) RPAREN. {
 461         val = vals;
 462         val->func = func_;
 463         val->vars = init_decl_vars(var);
 464 }
 465 set_value(val) ::= set_func(func_) LPAREN decl_var(var) COMMA num_exp(num_) COMMA set_vals(vals) RPAREN. {
 466         val = vals;
 467         val->func = func_;
 468         val->num = num_;
 469         val->vars = init_decl_vars(var);
 470 }
 471 %type set_vals {set_value*}
 472 %destructor set_vals {free_set_value($$);}
 473 set_vals(vals) ::= set_value(val). {
 474         vals = add_inner_set_value(init_set_value(NULL, NULL), val);
 475 }
 476 set_vals(vals) ::= set_vals(vals_) COMMA set_value(val). {
 477         vals = add_inner_set_value(vals_, val);
 478 }
 479
 480 %token_class set_func_token TO_OBJECT TO_ARRAY TO_STRING TO_INT TO_FLOAT TO_BOOL VOID.
 481 %type set_func {set_func*}
 482 %destructor set_func {free_set_func($$);}
 483 set_func(func) ::= set_func_token(T). {
 484         func = init_set_func(T->type, T->text);
 485         func->token = T;
 486 }
 487
 488 %type return_stmt {return_stmt*}
 489 %destructor return_stmt {free_return_stmt($$);}
 490 return_stmt(ret) ::= RETURN(T) set_value(val) EOS. {
 491         ret = init_return_stmt(val);
 492         ret->token = T;
 493 }
 494
 495 %type free_stmt {free_stmt*}
 496 %destructor free_stmt {free_free_stmt($$);}
 497 free_stmt(free) ::= FREE free_calls(calls) EOS. {
 498         free = init_free_stmt(calls);
 499 }
 500
 501 %type free_calls {free_calls*}
 502 %destructor free_calls {free_free_calls($$);}
 503 free_calls(calls) ::= free_call(call). {
 504         calls = init_free_calls(call);
 505 }
 506 free_calls(calls) ::= free_calls(calls_) COMMA free_call(call). {
 507         calls = add_free_call(calls_, call);
 508 }
 509
 510 %type free_call {free_call*}
 511 %destructor free_call {free_free_call($$);}
 512 free_call(call) ::= NAME(F) LPAREN decl_vars(vars) RPAREN. {
 513         call = init_free_call(F->text, vars);
 514         call->token = F;
 515 }
 516
 517 %token_class impl_type_token VOID MIXED BOOL INT FLOAT STRING ARRAY OBJECT.
 518 %type impl_type {impl_type*}
 519 %destructor impl_type {free_impl_type($$);}
 520 impl_type(type_) ::= impl_type_token(T). {
 521         type_ = init_impl_type(T->type, T->text);
 522         free(T);
 523 }
 524
 525 %type reference {char}
 526 reference(r) ::= . {r = 0;}
 527 reference(r) ::= AMPERSAND. {r = 1;}
 528
 529 %type indirection {unsigned}
 530 indirection(i) ::= . {i = 0;}
 531 indirection(i) ::= pointers(p). {i = p;}
 532
 533 %type pointers {unsigned}
 534 pointers(p) ::= ASTERISK. {p = 1;}
 535 pointers(p) ::= pointers(P) ASTERISK. {p = P+1;}