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