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