1: %{ 2: #ifndef lint 3: static char RCSid[] = "$Header: courier.y,v 2.0 85/11/21 07:21:35 jqj Exp $"; 4: #endif 5: 6: /* $Log: courier.y,v $ 7: * Revision 2.0 85/11/21 07:21:35 jqj 8: * 4.3BSD standard release 9: * 10: * Revision 1.1 85/11/20 12:58:22 jqj 11: * Initial revision 12: * 13: * Revision 1.6 85/05/23 06:19:42 jqj 14: * Public Beta-test version, released 24 May 1985 15: * 16: * Revision 1.5 85/05/06 08:13:14 jqj 17: * Almost Beta-test version. 18: * 19: * Revision 1.4 85/03/26 06:09:49 jqj 20: * Revised public alpha-test version, released 26 March 1985 21: * 22: * Revision 1.3 85/03/11 16:39:15 jqj 23: * Public alpha-test version, released 11 March 1985 24: * 25: * Revision 1.2 85/02/21 11:05:07 jqj 26: * alpha test version 27: * 28: * Revision 1.1 85/02/15 13:53:01 jqj 29: * Initial revision 30: * 31: */ 32: 33: #include "compiler.h" 34: 35: static char *currentdecl; 36: static char streamdecl; 37: %} 38: 39: %token 40: identifier number string 41: 42: %token 43: ARRAY _BEGIN BOOLEAN CARDINAL 44: CHOICE DEPENDS END ERROR 45: INTEGER LONG OF PROCEDURE 46: PROGRAM RECORD REPORTS RETURNS 47: SEQUENCE STRING TYPE UNSPECIFIED 48: UPON VERSION TRUE FALSE 49: _CHOOSES 50: 51: %union { 52: struct type *type; 53: struct constant *constant; 54: list list; 55: char *stringvalue; 56: } 57: 58: %type <type> 59: ConstructedType 60: DesignatorType 61: PredefinedType 62: ReferencedType 63: Type 64: 65: %type <constant> 66: ReferencedConstant 67: Constant 68: PredefinedConstant 69: ConstructedConstant 70: 71: %type <list> 72: ArgumentList Candidate CandidateList 73: Correspondence CorrespondenceList Designator 74: DesignatorList ErrorList Field 75: FieldList NameList ResultList 76: Component ReferencedProgramList ElementList 77: ComponentList TypedCandidate TypedCandidateList 78: TypedDesignator TypedDesignatorList CNameList 79: 80: %type <stringvalue> 81: NumericValue MaximumNumber 82: ReferencedProgram ProgramHeader 83: identifier number string 84: 85: %start Program 86: %% 87: 88: Program : 89: ProgramHeader ProgramBody 90: { 91: wrapup_program($1); 92: } 93: ; 94: 95: ProgramHeader : 96: identifier ':' PROGRAM number VERSION number '=' 97: { 98: program_header($1,$4,$6); 99: $$ = $1; 100: } 101: ; 102: 103: ProgramBody : 104: _BEGIN DependencyList DeclarationList END '.' 105: ; 106: 107: DependencyList : 108: /* empty */ 109: { 110: program_body(); 111: } 112: | DEPENDS UPON ReferencedProgramList ';' 113: { 114: program_body(); 115: } 116: ; 117: 118: ReferencedProgramList : 119: ReferencedProgram 120: { 121: } 122: | ReferencedProgramList ',' ReferencedProgram 123: { 124: } 125: ; 126: 127: ReferencedProgram : 128: identifier '(' number ')' VERSION number 129: { 130: /* as a side effect, the program is entered into the */ 131: /* list of dependencies */ 132: ref_program($1,$3,$6); 133: $$ = $1; 134: } 135: ; 136: 137: DeclarationList : 138: /* empty */ 139: | DeclarationList Declaration 140: ; 141: 142: Declaration : 143: Target TypeDeclaration 144: | Target ConstantDeclaration 145: | error ';' 146: { 147: fprintf(stderr,"\t\t\tDeclaration skipped\n"); 148: } 149: ; 150: 151: Target : 152: identifier ':' 153: { 154: struct object *symbol; 155: 156: currentdecl = $1; 157: streamdecl = 0; /* not parsing a StreamOf yet */ 158: if (symbol = check_def(currentdecl, CurrentProgram)) { 159: error(ERROR, 160: "Attempt to redefine ``%s''", 161: name_of(symbol)); 162: YYERROR; 163: } 164: } 165: ; 166: 167: TypeDeclaration : 168: TYPE '=' Type ';' 169: { 170: struct object *symbol; 171: 172: symbol = make_symbol(currentdecl, CurrentProgram); 173: define_type(symbol, $3); 174: } 175: ; 176: 177: ConstantDeclaration : 178: Type '=' Constant ';' 179: { 180: struct object *symbol; 181: 182: symbol = make_symbol(currentdecl, CurrentProgram); 183: if (type_check($1, $3)) { 184: define_constant(symbol, $1, $3); 185: } else 186: error(ERROR, 187: "Type clash in declaration of ``%s''", 188: name_of(symbol)); 189: } 190: ; 191: 192: Type : 193: PredefinedType 194: { 195: $$ = $1; 196: } 197: | ConstructedType 198: { 199: $$ = $1; 200: } 201: | ReferencedType 202: { 203: $$ = $1; 204: } 205: ; 206: 207: Constant : 208: PredefinedConstant 209: { 210: $$ = $1; 211: } 212: | 213: ConstructedConstant 214: { 215: $$ = $1; 216: } 217: | 218: ReferencedConstant 219: { 220: $$ = $1; 221: } 222: ; 223: 224: 225: PredefinedType : 226: BOOLEAN 227: { 228: $$ = Boolean_type; 229: } 230: | CARDINAL 231: { 232: $$ = Cardinal_type; 233: } 234: | LONG CARDINAL 235: { 236: $$ = LongCardinal_type; 237: } 238: | INTEGER 239: { 240: $$ = Integer_type; 241: } 242: | LONG INTEGER 243: { 244: $$ = LongInteger_type; 245: } 246: | STRING 247: { 248: $$ = String_type; 249: } 250: | UNSPECIFIED 251: { 252: $$ = Unspecified_type; 253: } 254: | LONG UNSPECIFIED 255: { 256: $$ = LongUnspecified_type; 257: } 258: ; 259: 260: PredefinedConstant : 261: TRUE 262: { 263: $$ = Boolean_constant("1"); 264: } 265: | 266: FALSE 267: { 268: $$ = Boolean_constant("0"); 269: } 270: | 271: number 272: { 273: $$ = Numeric_constant($1); 274: } 275: | 276: string 277: { 278: $$ = String_constant($1); 279: } 280: ; 281: 282: ConstructedConstant : 283: /* simple ReferencedConstant */ 284: identifier 285: { 286: struct object *sym; 287: 288: if (sym = check_def($1,(char *)NULL)) { 289: if (class_of(sym) == O_ENUMTAG) 290: $$ = enumeration_constant(sym->o_enum->en_name); 291: else if (class_of(sym) == O_CONSTANT && 292: sym->o_constant->cn_constr == C_ENUMERATION) 293: $$ = sym->o_constant; 294: else { 295: error(ERROR, 296: "``%s'' is not of appropriate type", 297: name_of(sym)); 298: YYERROR; 299: } 300: } else if (sym = check_def($1, CurrentProgram)) { 301: if (class_of(sym) == O_CONSTANT) 302: $$ = sym->o_constant; 303: else { 304: error(ERROR, 305: "``%s'' is not of appropriate type", 306: name_of(sym)); 307: YYERROR; 308: } 309: } else { 310: error(ERROR,"``%s'' is not defined", 311: $1); 312: YYERROR; 313: } 314: } 315: | 316: /* SequenceConstant */ 317: /* ArrayConstant */ 318: '[' ElementList ']' 319: { 320: $$ = array_constant($2); 321: } 322: | 323: /* RecordConstant */ 324: '[' ComponentList ']' 325: { 326: $$ = record_constant($2); 327: } 328: | 329: /* RecordConstant */ 330: /* SequenceConstant */ 331: /* ArrayConstant */ 332: '[' ']' 333: { 334: $$ = record_constant(NIL); 335: } 336: | 337: /* ChoiceConstant */ 338: identifier Constant 339: { 340: struct object* symbol; 341: 342: if ((symbol = check_def($1,(char *)NULL)) || 343: (symbol = check_def($1,CurrentProgram))) { 344: if (class_of(symbol) == O_CONSTANT && 345: symbol->o_constant->cn_constr == C_ENUMERATION) { 346: $$ = choice_constant( 347: cons((list) symbol->o_constant->cn_value, 348: (list) $2) ); 349: } 350: else if (class_of(symbol) == O_ENUMTAG) { 351: $$ = choice_constant( 352: cons((list) symbol->o_enum->en_name, 353: (list) $2) ); 354: } 355: else { 356: error(ERROR, "Expected enumeration constant but got ``%s''\n", 357: name_of(symbol)); 358: YYERROR; 359: } 360: } 361: else { 362: error(ERROR, "Designator ``%s'' undefined\n", 363: $1); 364: YYERROR; 365: } 366: } 367: ; 368: 369: 370: ElementList : 371: Constant 372: { 373: $$ = cons((list) $1, NIL); 374: 375: } 376: | 377: Constant ',' ElementList 378: { 379: $$ = cons((list)$1, $3); 380: } 381: ; 382: 383: ComponentList : 384: Component 385: { 386: $$ = $1; 387: } 388: | 389: Component ',' ComponentList 390: { 391: /* flatten */ 392: cdr($1) = $3; 393: $$ = $1; 394: } 395: ; 396: 397: Component : 398: CNameList ':' Constant 399: { 400: list p; 401: 402: /* flatten this for simplicity of representation */ 403: for (p = $1; p != NIL; p = cdr(p)) 404: car(p) = cons(car(p),(list)$3); 405: $$ = $1; 406: } 407: ; 408: 409: CNameList : 410: identifier 411: { 412: /* note that CNameList now is a list of strings */ 413: $$ = cons((list) $1, NIL); 414: } 415: | identifier ',' CNameList 416: { 417: /* note that NameList now is a list of strings */ 418: $$ = cons(cons((list)$1, NIL), $3); 419: } 420: ; 421: 422: ConstructedType : 423: '{' CorrespondenceList '}' 424: { 425: $$ = enumeration_type($2); 426: } 427: | ARRAY NumericValue OF Type 428: { 429: $$ = array_type($2, $4); 430: } 431: | SEQUENCE MaximumNumber OF Type 432: { 433: $$ = sequence_type($2, $4); 434: } 435: | RECORD ArgumentList 436: { 437: $$ = record_type($2); 438: } 439: | CHOICE DesignatorType OF '{' TypedCandidateList '}' 440: { 441: $$ = choice_type($2, $5); 442: } 443: | CHOICE OF '{' CandidateList '}' 444: { 445: if (streamdecl > 0) { 446: $$ = choice_type(StreamEnum_type, $4); 447: } 448: /* as side effect build an anonymous enumerated type */ 449: else 450: $$ = choice_type((struct type *) NIL, $4); 451: } 452: | PROCEDURE ArgumentList ResultList ErrorList 453: { 454: $$ = procedure_type($2, $3, $4); 455: } 456: | ERROR ArgumentList 457: { 458: $$ = error_type( $2); 459: } 460: ; 461: 462: ReferencedType : 463: identifier 464: { 465: struct object *symbol; 466: 467: if (symbol = check_def($1,CurrentProgram)) { 468: if (class_of(symbol) == O_TYPE) 469: $$ = symbol->o_type; 470: else { 471: error(ERROR,"``%s'' is not a type", 472: name_of(symbol)); 473: YYERROR; 474: } 475: } 476: else if (streq($1,currentdecl)) { 477: if (strncmp(currentdecl,"StreamOf",8) == 0) { 478: streamdecl++; 479: error(WARNING, 480: "Stream definition of ``%s'';\n\ 481: \t\t\trecursion treated as Nil record", 482: $1); 483: $$ = record_type(NIL); 484: } else { 485: /* fake it */ 486: $$ = enumeration_type(NIL); 487: $$->type_name = make_full_name( 488: CurrentProgram, CurrentVersion, 489: currentdecl); 490: } 491: } 492: else { 493: error(ERROR,"``%s'' is unrecognized", $1); 494: YYERROR; 495: } 496: } 497: | identifier '.' identifier 498: { 499: struct object *symbol; 500: 501: if (check_dependency($1) && 502: (symbol = check_def($3,$1))) { 503: if (class_of(symbol) == O_TYPE) 504: $$ = symbol->o_type; 505: else { 506: error(ERROR,"``%s'' is not a type", 507: name_of(symbol)); 508: YYERROR; 509: } 510: } 511: else { 512: error(ERROR,"``%s.%s'' is unrecognized",$1,$3); 513: YYERROR; 514: } 515: } 516: ; 517: 518: CorrespondenceList : 519: Correspondence 520: { 521: $$ = cons($1, NIL); 522: } 523: | CorrespondenceList ',' Correspondence 524: { 525: $$ = nconc($1, cons($3, NIL)); 526: } 527: ; 528: 529: Correspondence : 530: identifier '(' NumericValue ')' 531: { 532: struct object *symbol; 533: char *newid; 534: 535: if (!(symbol = check_def($1,(char *)NULL))) { 536: symbol = make_symbol($1,(char *)NULL); 537: define_enumeration_symbol(symbol,$3); 538: } 539: else if (class_of(symbol) != O_ENUMTAG) { 540: error(ERROR,"``%s'' already defined", 541: name_of(symbol)); 542: YYERROR; 543: } 544: else if ((streq($1,"nextSegment") && 545: stringtocard($3) == 0) || 546: (streq($1,"lastSegment") && 547: stringtocard($3) == 1)) { 548: /* do nothing */ 549: streamdecl++; 550: } 551: else /* 552: * if (symbol->o_enum->en_value!=stringtocard($3)) 553: */ { 554: newid = gensym($1); 555: error(WARNING, 556: "Enumerator ``%s'' already declared;\n\ 557: \t\t\tusing name ``%s'' instead", 558: $1,newid); 559: symbol = make_symbol(newid,(char *)NULL); 560: define_enumeration_symbol(symbol,$3); 561: } 562: $$ = cons((list) symbol, (list) $3); 563: } 564: ; 565: 566: MaximumNumber : 567: NumericValue 568: { 569: $$ = $1; 570: } 571: | /* empty */ 572: { 573: $$ = "65535"; /* maximum Cardinal */ 574: } 575: ; 576: 577: NumericValue : 578: number 579: { 580: $$ = $1; 581: } 582: | ReferencedConstant 583: { 584: if (($1)->cn_constr != C_NUMERIC) { 585: error(ERROR,"Expected numeric constant"); 586: YYERROR; 587: } 588: $$ = ($1)->cn_value; 589: } 590: ; 591: 592: DesignatorType : 593: ReferencedType 594: { 595: $$ = $1; 596: } 597: ; 598: 599: TypedCandidateList : 600: TypedCandidate 601: { 602: $$ = cons($1, NIL); 603: } 604: | TypedCandidateList ',' TypedCandidate 605: { 606: $$ = nconc($1, cons($3, NIL)); 607: } 608: ; 609: 610: TypedCandidate : 611: TypedDesignatorList _CHOOSES Type 612: { 613: $$ = cons($1, (list) $3); 614: } 615: ; 616: 617: TypedDesignatorList : 618: TypedDesignator 619: { 620: $$ = cons($1, NIL); 621: } 622: | TypedDesignatorList ',' TypedDesignator 623: { 624: $$ = nconc($1, cons($3, NIL)); 625: } 626: ; 627: 628: TypedDesignator : 629: identifier 630: { 631: struct object *symbol; 632: 633: if ((symbol = check_def($1,CurrentProgram)) && 634: symbol->o_constant->cn_constr == C_ENUMERATION) { 635: $1 = symbol->o_constant->cn_value; 636: } 637: if ((symbol = check_def($1,(char *)NULL)) && 638: class_of(symbol) == O_ENUMTAG) 639: $$ = cons((list) symbol, NIL); 640: else { 641: error(ERROR,"Designator ``%s'' is not of appropriate type", 642: $1); 643: YYERROR; 644: } 645: } 646: ; 647: 648: CandidateList : 649: Candidate 650: { 651: $$ = cons($1, NIL); 652: } 653: | CandidateList ',' Candidate 654: { 655: $$ = nconc($1, cons($3, NIL)); 656: } 657: ; 658: 659: Candidate : 660: DesignatorList _CHOOSES Type 661: { 662: $$ = cons($1, (list) $3); 663: } 664: ; 665: 666: DesignatorList : 667: Designator 668: { 669: $$ = cons($1, NIL); 670: } 671: | DesignatorList ',' Designator 672: { 673: $$ = nconc($1, cons($3, NIL)); 674: } 675: ; 676: 677: Designator : 678: Correspondence 679: { 680: $$ = $1; 681: } 682: ; 683: 684: ResultList : 685: /* empty */ 686: { 687: $$ = NIL; 688: } 689: | RETURNS '[' FieldList ']' 690: { 691: $$ = $3; 692: } 693: ; 694: 695: ArgumentList : 696: /* empty */ 697: { 698: $$ = NIL; 699: } 700: | '[' ']' 701: { 702: $$ = NIL; 703: } 704: | '[' FieldList ']' 705: { 706: $$ = $2; 707: } 708: ; 709: 710: ErrorList : 711: /* empty */ 712: { 713: $$ = NIL; 714: } 715: | REPORTS '[' NameList ']' 716: { 717: $$ = $3; 718: } 719: ; 720: 721: FieldList : 722: Field 723: { 724: $$ = $1; 725: } 726: | FieldList ',' Field 727: { 728: $$ = nconc($1, $3); 729: } 730: ; 731: 732: Field : 733: NameList ':' Type 734: { 735: /* flatten representation for simplicity */ 736: /* note that this could be even simpler, but I */ 737: /* don't have the patience to change code everywhere */ 738: list p; 739: 740: for (p = $1; p != NIL; p = cdr(p)) 741: car(p) = cons(cons(car(p),NIL),(list)$3); 742: $$ = $1; 743: } 744: ; 745: 746: ReferencedConstant : 747: /* see ConstructedConstant for simple referenced constants */ 748: identifier '.' identifier 749: { 750: struct object *symbol; 751: 752: if (check_dependency($1) && (symbol=check_def($3,$1))) { 753: if (class_of(symbol) != O_CONSTANT) { 754: error(ERROR,"Constant expected, but got ``%s''", 755: name_of(symbol)); 756: YYERROR; 757: } 758: $$ = symbol->o_constant; 759: } else { 760: error(ERROR,"Unrecognized symbol ``%s.%s''", 761: $1,$3); 762: } 763: } 764: ; 765: 766: NameList : 767: identifier 768: { 769: /* note that NameList now is a list of strings */ 770: $$ = cons((list) $1, NIL); 771: } 772: | NameList ',' identifier 773: { 774: /* note that NameList now is a list of strings */ 775: $$ = nconc($1, cons((list) $3, NIL)); 776: } 777: ; 778: 779: 780: %% 781: 782: YYSTYPE yyv[]; 783: int yynerrs; 784: extern int yylineno; 785: 786: struct parser_state { 787: YYSTYPE yyv[YYMAXDEPTH]; 788: YYSTYPE yylval; 789: YYSTYPE yyval; 790: int yychar; 791: int yynerrs; 792: short yyerrflag; 793: int yylineno; 794: int recursive_flag; 795: char *CurrentProgram; 796: int CurrentVersion; 797: int CurrentNumber; 798: char yysbuf[200]; /*YYLMAX*/ 799: char *yysptr; 800: }; 801: extern char yysbuf[], *yysptr; 802: 803: int * 804: save_parser_state() 805: { 806: struct parser_state *p; 807: 808: p = New(struct parser_state); 809: bcopy(yyv, p->yyv, YYMAXDEPTH*sizeof(YYSTYPE)); 810: p->yylval = yylval; 811: p->yyval = yyval; 812: p->yychar = yychar; 813: p->yynerrs = yynerrs; 814: p->yyerrflag = yyerrflag; 815: p->yylineno = yylineno; 816: p->recursive_flag = recursive_flag; 817: p->CurrentProgram = CurrentProgram; 818: p->CurrentVersion = CurrentVersion; 819: p->CurrentNumber = CurrentNumber; 820: p->yysptr = yysptr; 821: bcopy(yysbuf, p->yysbuf, 200); 822: yysptr = yysbuf; 823: recursive_flag = 1; 824: return ((int*) p); 825: } 826: 827: restore_parser_state(p) 828: struct parser_state *p; 829: { 830: yysptr = p->yysptr; 831: bcopy(p->yysbuf, yysbuf, 200); 832: CurrentProgram = p->CurrentProgram; 833: CurrentVersion = p->CurrentVersion; 834: CurrentNumber = p->CurrentNumber; 835: recursive_flag = p->recursive_flag; 836: yylineno = p->yylineno; 837: yyerrflag = p->yyerrflag; 838: yynerrs = p->yynerrs; 839: yychar = p->yychar; 840: yyval = p->yyval; 841: yylval = p->yylval; 842: bcopy(p->yyv, yyv, YYMAXDEPTH*sizeof(YYSTYPE)); 843: free((char *) p); 844: }
Defined functions
_restore_parser_state
defined in line 827; used 1 times
- in /usr/src/new/xns/compiler/code.c line 190
_save_parser_state
defined in line 803; used 2 times
- in /usr/src/new/xns/compiler/code.c line 146, 187
Defined variables
_ProgramBody
defined in line 89; never used
_ProgramHeader
defined in line 89; never used
_identifier
defined in line 83; used 17 times
Defined struct's
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Last modified: 1986-03-13
Generated: 2016-12-26 |
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