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