forked from KolibriOS/kolibrios
1166 lines
30 KiB
Plaintext
1166 lines
30 KiB
Plaintext
(*
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BSD 2-Clause License
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Copyright (c) 2018, 2019, Anton Krotov
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All rights reserved.
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*)
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MODULE PARS;
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IMPORT PROG, SCAN, ARITH, STRINGS, ERRORS, LISTS, CODE, CONSOLE, PATHS, MACHINE, C := COLLECTIONS, mConst := CONSTANTS;
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CONST
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eCONST* = 1; eTYPE* = 2; eVAR* = 3; eEXPR* = 4;
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eVREC* = 5; ePROC* = 6; eVPAR* = 7; ePARAM* = 8;
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eSTPROC* = 9; eSTFUNC* = 10; eSYSFUNC* = 11; eSYSPROC* = 12;
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eIMP* = 13;
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TYPE
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PATH* = PATHS.PATH;
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PARSER* = POINTER TO rPARSER;
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EXPR* = RECORD
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obj*: INTEGER;
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type*: PROG.TYPE_;
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value*: ARITH.VALUE;
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stproc*: INTEGER;
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readOnly*: BOOLEAN;
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ident*: PROG.IDENT
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END;
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STATPROC = PROCEDURE (parser: PARSER);
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EXPRPROC = PROCEDURE (parser: PARSER; VAR e: EXPR);
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RETPROC = PROCEDURE (parser: PARSER; e: EXPR; t: PROG.TYPE_; pos: SCAN.POSITION): BOOLEAN;
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rPARSER = RECORD (C.ITEM)
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fname*: PATH;
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path: PATH;
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lib_path: PATH;
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ext: PATH;
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modname: PATH;
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scanner: SCAN.SCANNER;
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lex*: SCAN.LEX;
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sym*: INTEGER;
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unit*: PROG.UNIT;
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constexp*: BOOLEAN;
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main*: BOOLEAN;
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open*: PROCEDURE (parser: PARSER; modname: ARRAY OF CHAR): BOOLEAN;
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parse*: PROCEDURE (parser: PARSER);
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StatSeq*: STATPROC;
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expression*: EXPRPROC;
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designator*: EXPRPROC;
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chkreturn: RETPROC;
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create*: PROCEDURE (path, lib_path: PATH; StatSeq: STATPROC; expression, designator: EXPRPROC; chkreturn: RETPROC): PARSER
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END;
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VAR
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program*: PROG.PROGRAM;
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parsers: C.COLLECTION;
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PROCEDURE destroy* (VAR parser: PARSER);
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BEGIN
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IF parser.scanner # NIL THEN
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SCAN.close(parser.scanner)
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END;
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C.push(parsers, parser);
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parser := NIL
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END destroy;
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PROCEDURE error* (parser: PARSER; pos: SCAN.POSITION; errno: INTEGER);
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BEGIN
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ERRORS.errormsg(parser.fname, pos.line, pos.col, errno)
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END error;
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PROCEDURE check* (condition: BOOLEAN; parser: PARSER; pos: SCAN.POSITION; errno: INTEGER);
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BEGIN
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IF ~condition THEN
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error(parser, pos, errno)
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END
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END check;
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PROCEDURE check1* (condition: BOOLEAN; parser: PARSER; errno: INTEGER);
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BEGIN
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IF ~condition THEN
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error(parser, parser.lex.pos, errno)
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END
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END check1;
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PROCEDURE getpos (parser: PARSER; VAR pos: SCAN.POSITION);
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BEGIN
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pos := parser.lex.pos
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END getpos;
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PROCEDURE Next* (parser: PARSER);
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VAR
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errno: INTEGER;
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BEGIN
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SCAN.Next(parser.scanner, parser.lex);
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errno := parser.lex.error;
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IF errno # 0 THEN
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check1(FALSE, parser, errno)
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END;
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parser.sym := parser.lex.sym
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END Next;
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PROCEDURE NextPos* (parser: PARSER; VAR pos: SCAN.POSITION);
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BEGIN
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Next(parser);
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pos := parser.lex.pos
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END NextPos;
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PROCEDURE checklex* (parser: PARSER; sym: INTEGER);
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VAR
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err: INTEGER;
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BEGIN
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IF parser.sym # sym THEN
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CASE sym OF
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|SCAN.lxCOMMA: err := 65
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|SCAN.lxRROUND: err := 33
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|SCAN.lxPOINT: err := 26
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|SCAN.lxIDENT: err := 22
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|SCAN.lxRSQUARE: err := 71
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|SCAN.lxRCURLY: err := 35
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|SCAN.lxUNDEF: err := 34
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|SCAN.lxTHEN: err := 88
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|SCAN.lxEND: err := 27
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|SCAN.lxDO: err := 89
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|SCAN.lxUNTIL: err := 90
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|SCAN.lxCOLON: err := 53
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|SCAN.lxOF: err := 67
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|SCAN.lxASSIGN: err := 96
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|SCAN.lxTO: err := 57
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|SCAN.lxLROUND: err := 64
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|SCAN.lxEQ: err := 32
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|SCAN.lxSEMI: err := 24
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|SCAN.lxRETURN: err := 38
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|SCAN.lxMODULE: err := 21
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|SCAN.lxSTRING: err := 66
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END;
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check1(FALSE, parser, err)
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END
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END checklex;
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PROCEDURE ExpectSym* (parser: PARSER; sym: INTEGER);
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BEGIN
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Next(parser);
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checklex(parser, sym)
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END ExpectSym;
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PROCEDURE ImportList (parser: PARSER);
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VAR
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name: SCAN.IDENT;
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parser2: PARSER;
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pos: SCAN.POSITION;
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alias: BOOLEAN;
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unit: PROG.UNIT;
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ident: PROG.IDENT;
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units: PROG.UNITS;
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BEGIN
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units := program.units;
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alias := FALSE;
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REPEAT
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ExpectSym(parser, SCAN.lxIDENT);
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name := parser.lex.ident;
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getpos(parser, pos);
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IF ~alias THEN
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ident := parser.unit.idents.add(parser.unit, name, PROG.idMODULE);
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check(ident # NIL, parser, pos, 30)
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END;
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Next(parser);
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IF (parser.sym = SCAN.lxCOMMA) OR (parser.sym = SCAN.lxSEMI) THEN
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alias := FALSE;
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unit := units.get(units, name);
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IF unit # NIL THEN
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check(unit.closed, parser, pos, 31)
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ELSE
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parser2 := parser.create(parser.path, parser.lib_path,
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parser.StatSeq, parser.expression, parser.designator, parser.chkreturn);
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IF ~parser2.open(parser2, name.s) THEN
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IF parser.path # parser.lib_path THEN
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destroy(parser2);
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parser2 := parser.create(parser.lib_path, parser.lib_path,
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parser.StatSeq, parser.expression, parser.designator, parser.chkreturn);
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check(parser2.open(parser2, name.s), parser, pos, 29)
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ELSE
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check(FALSE, parser, pos, 29)
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END
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END;
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parser2.parse(parser2);
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unit := parser2.unit;
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destroy(parser2)
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END;
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IF unit = program.sysunit THEN
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parser.unit.sysimport := TRUE
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END;
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ident.unit := unit
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ELSIF parser.sym = SCAN.lxASSIGN THEN
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alias := TRUE
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ELSE
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check1(FALSE, parser, 28)
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END
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UNTIL parser.sym = SCAN.lxSEMI;
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Next(parser)
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END ImportList;
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PROCEDURE QIdent (parser: PARSER; forward: BOOLEAN): PROG.IDENT;
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VAR
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ident: PROG.IDENT;
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unit: PROG.UNIT;
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BEGIN
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ASSERT(parser.sym = SCAN.lxIDENT);
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ident := parser.unit.idents.get(parser.unit, parser.lex.ident, FALSE);
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IF ~forward THEN
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check1(ident # NIL, parser, 48)
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END;
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IF (ident # NIL) & (ident.typ = PROG.idMODULE) THEN
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unit := ident.unit;
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ExpectSym(parser, SCAN.lxPOINT);
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ExpectSym(parser, SCAN.lxIDENT);
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ident := unit.idents.get(unit, parser.lex.ident, FALSE);
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check1((ident # NIL) & ident.export, parser, 48)
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END
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RETURN ident
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END QIdent;
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PROCEDURE strcmp* (VAR v: ARITH.VALUE; v2: ARITH.VALUE; operator: INTEGER);
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VAR
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str: SCAN.LEXSTR;
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string1, string2: SCAN.IDENT;
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bool: BOOLEAN;
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BEGIN
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IF v.typ = ARITH.tCHAR THEN
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ASSERT(v2.typ = ARITH.tSTRING);
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ARITH.charToStr(v, str);
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string1 := SCAN.enterid(str);
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string2 := v2.string(SCAN.IDENT)
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END;
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IF v2.typ = ARITH.tCHAR THEN
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ASSERT(v.typ = ARITH.tSTRING);
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ARITH.charToStr(v2, str);
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string2 := SCAN.enterid(str);
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string1 := v.string(SCAN.IDENT)
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END;
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IF v.typ = v2.typ THEN
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string1 := v.string(SCAN.IDENT);
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string2 := v2.string(SCAN.IDENT)
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END;
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CASE operator OF
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|SCAN.lxEQ: bool := string1.s = string2.s
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|SCAN.lxNE: bool := string1.s # string2.s
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|SCAN.lxLT: bool := string1.s < string2.s
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|SCAN.lxGT: bool := string1.s > string2.s
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|SCAN.lxLE: bool := string1.s <= string2.s
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|SCAN.lxGE: bool := string1.s >= string2.s
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END;
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ARITH.setbool(v, bool)
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END strcmp;
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PROCEDURE ConstExpression* (parser: PARSER; VAR v: ARITH.VALUE);
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VAR
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e: EXPR;
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pos: SCAN.POSITION;
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BEGIN
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getpos(parser, pos);
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parser.constexp := TRUE;
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parser.expression(parser, e);
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parser.constexp := FALSE;
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check(e.obj = eCONST, parser, pos, 62);
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v := e.value
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END ConstExpression;
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PROCEDURE FieldList (parser: PARSER; rec: PROG.TYPE_);
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VAR
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name: SCAN.IDENT;
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export: BOOLEAN;
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pos: SCAN.POSITION;
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BEGIN
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ASSERT(parser.sym = SCAN.lxIDENT);
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WHILE parser.sym = SCAN.lxIDENT DO
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getpos(parser, pos);
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name := parser.lex.ident;
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Next(parser);
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export := parser.sym = SCAN.lxMUL;
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IF export THEN
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check1(parser.unit.scopeLvl = 0, parser, 61);
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Next(parser)
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END;
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check(rec.fields.add(rec, name, export), parser, pos, 30);
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IF parser.sym = SCAN.lxCOMMA THEN
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ExpectSym(parser, SCAN.lxIDENT)
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ELSE
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checklex(parser, SCAN.lxCOLON)
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END
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END
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END FieldList;
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PROCEDURE FormalParameters (parser: PARSER; type: PROG.TYPE_);
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VAR
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ident: PROG.IDENT;
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PROCEDURE FPSection (parser: PARSER; type: PROG.TYPE_);
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VAR
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ident: PROG.IDENT;
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exit: BOOLEAN;
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vPar: BOOLEAN;
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dim: INTEGER;
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t0, t1: PROG.TYPE_;
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BEGIN
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vPar := parser.sym = SCAN.lxVAR;
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IF vPar THEN
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Next(parser)
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END;
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checklex(parser, SCAN.lxIDENT);
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exit := FALSE;
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WHILE (parser.sym = SCAN.lxIDENT) & ~exit DO
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check1(type.params.add(type, parser.lex.ident, vPar), parser, 30);
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Next(parser);
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IF parser.sym = SCAN.lxCOMMA THEN
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ExpectSym(parser, SCAN.lxIDENT)
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ELSIF parser.sym = SCAN.lxCOLON THEN
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Next(parser);
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dim := 0;
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WHILE parser.sym = SCAN.lxARRAY DO
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INC(dim);
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check1(dim <= PROG.MAXARRDIM, parser, 84);
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ExpectSym(parser, SCAN.lxOF);
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Next(parser)
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END;
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checklex(parser, SCAN.lxIDENT);
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ident := QIdent(parser, FALSE);
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check1(ident.typ = PROG.idTYPE, parser, 68);
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t0 := ident.type;
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t1 := t0;
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WHILE dim > 0 DO
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t1 := program.enterType(program, PROG.tARRAY, -1, 0, parser.unit);
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t1.base := t0;
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t0 := t1;
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DEC(dim)
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END;
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type.params.set(type, t1);
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Next(parser);
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exit := TRUE
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ELSE
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checklex(parser, SCAN.lxCOLON)
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END
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END
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END FPSection;
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BEGIN
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IF parser.sym = SCAN.lxLROUND THEN
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Next(parser);
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IF (parser.sym = SCAN.lxVAR) OR (parser.sym = SCAN.lxIDENT) THEN
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FPSection(parser, type);
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WHILE parser.sym = SCAN.lxSEMI DO
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Next(parser);
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FPSection(parser, type)
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END
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END;
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checklex(parser, SCAN.lxRROUND);
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Next(parser);
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IF parser.sym = SCAN.lxCOLON THEN
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ExpectSym(parser, SCAN.lxIDENT);
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ident := QIdent(parser, FALSE);
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check1(ident.typ = PROG.idTYPE, parser, 68);
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check1((ident.type.typ # PROG.tRECORD) & (ident.type.typ # PROG.tARRAY), parser, 69);
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check1( ~(ODD(type.call) & (ident.type.typ = PROG.tREAL)), parser, 113);
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type.base := ident.type;
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Next(parser)
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ELSE
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type.base := NIL
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END
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END
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END FormalParameters;
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PROCEDURE sysflag (parser: PARSER): INTEGER;
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VAR
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res: INTEGER;
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BEGIN
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IF parser.lex.s = "stdcall" THEN
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res := PROG.stdcall
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ELSIF parser.lex.s = "stdcall64" THEN
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res := PROG.stdcall64
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ELSIF parser.lex.s = "ccall" THEN
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res := PROG.ccall
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ELSIF parser.lex.s = "ccall16" THEN
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res := PROG.ccall16
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ELSIF parser.lex.s = "win64" THEN
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res := PROG.win64
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ELSIF parser.lex.s = "systemv" THEN
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res := PROG.systemv
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ELSIF parser.lex.s = "windows" THEN
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IF program.target.sys IN {mConst.Target_iConsole, mConst.Target_iGUI, mConst.Target_iDLL} THEN
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res := PROG.stdcall
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ELSIF program.target.sys IN {mConst.Target_iConsole64, mConst.Target_iGUI64, mConst.Target_iDLL64} THEN
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res := PROG.win64
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ELSE
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check1(FALSE, parser, 118)
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END
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ELSIF parser.lex.s = "linux" THEN
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IF program.target.sys = mConst.Target_iELF32 THEN
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res := PROG.ccall16
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ELSIF program.target.sys = mConst.Target_iELF64 THEN
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res := PROG.systemv
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ELSE
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check1(FALSE, parser, 119)
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END
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ELSIF parser.lex.s = "noalign" THEN
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res := PROG.noalign
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ELSE
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res := 0
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END
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RETURN res
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END sysflag;
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PROCEDURE procflag (parser: PARSER; VAR import: CODE.IMPORT_PROC; isProc: BOOLEAN): INTEGER;
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VAR
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call: INTEGER;
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dll, proc: SCAN.LEXSTR;
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pos: SCAN.POSITION;
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BEGIN
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import := NIL;
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IF parser.sym = SCAN.lxLSQUARE THEN
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getpos(parser, pos);
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check1(parser.unit.sysimport, parser, 54);
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Next(parser);
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call := sysflag(parser);
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IF program.target.bit_depth = 64 THEN
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check1(call IN PROG.callconv64, parser, 117)
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ELSIF program.target.bit_depth = 32 THEN
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check1(call IN PROG.callconv32, parser, 63)
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END;
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Next(parser);
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IF parser.sym = SCAN.lxMINUS THEN
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Next(parser);
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INC(call)
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END;
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IF ~isProc THEN
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checklex(parser, SCAN.lxRSQUARE)
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END;
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IF parser.sym = SCAN.lxCOMMA THEN
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ExpectSym(parser, SCAN.lxSTRING);
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dll := parser.lex.s;
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ExpectSym(parser, SCAN.lxCOMMA);
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ExpectSym(parser, SCAN.lxSTRING);
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proc := parser.lex.s;
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Next(parser);
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import := CODE.AddImp(dll, proc)
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END;
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checklex(parser, SCAN.lxRSQUARE);
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Next(parser)
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ELSE
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IF program.target.bit_depth = 32 THEN
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call := PROG.default
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ELSIF program.target.bit_depth = 64 THEN
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call := PROG.default64
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END
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END;
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IF import # NIL THEN
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check(~(program.target.sys IN {mConst.Target_iELF32, mConst.Target_iELF64}), parser, pos, 70)
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END
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RETURN call
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END procflag;
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PROCEDURE type (parser: PARSER; VAR t: PROG.TYPE_; flags: SET);
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CONST
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comma = 0;
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closed = 1;
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forward = 2;
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VAR
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arrLen: ARITH.VALUE;
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typeSize: ARITH.VALUE;
|
|
ident: PROG.IDENT;
|
|
unit: PROG.UNIT;
|
|
pos, pos2: SCAN.POSITION;
|
|
fieldType: PROG.TYPE_;
|
|
baseIdent: SCAN.IDENT;
|
|
a, b: INTEGER;
|
|
RecFlag: INTEGER;
|
|
import: CODE.IMPORT_PROC;
|
|
|
|
BEGIN
|
|
unit := parser.unit;
|
|
t := NIL;
|
|
|
|
IF parser.sym = SCAN.lxIDENT THEN
|
|
ident := QIdent(parser, forward IN flags);
|
|
|
|
IF ident # NIL THEN
|
|
check1(ident.typ = PROG.idTYPE, parser, 49);
|
|
t := ident.type;
|
|
check1(t # NIL, parser, 50);
|
|
IF closed IN flags THEN
|
|
check1(t.closed, parser, 50)
|
|
END
|
|
END;
|
|
|
|
Next(parser)
|
|
|
|
ELSIF (parser.sym = SCAN.lxARRAY) OR ((parser.sym = SCAN.lxCOMMA) & (comma IN flags)) THEN
|
|
|
|
IF parser.sym = SCAN.lxARRAY THEN
|
|
getpos(parser, pos2)
|
|
END;
|
|
NextPos(parser, pos);
|
|
|
|
ConstExpression(parser, arrLen);
|
|
|
|
check(arrLen.typ = ARITH.tINTEGER, parser, pos, 43);
|
|
check(ARITH.check(arrLen), parser, pos, 39);
|
|
check(ARITH.getInt(arrLen) > 0, parser, pos, 51);
|
|
|
|
t := program.enterType(program, PROG.tARRAY, -1, ARITH.getInt(arrLen), unit);
|
|
|
|
IF parser.sym = SCAN.lxCOMMA THEN
|
|
type(parser, t.base, {comma, closed})
|
|
ELSIF parser.sym = SCAN.lxOF THEN
|
|
Next(parser);
|
|
type(parser, t.base, {closed})
|
|
ELSE
|
|
check1(FALSE, parser, 47)
|
|
END;
|
|
|
|
t.align := t.base.align;
|
|
|
|
a := t.length;
|
|
b := t.base.size;
|
|
check(ARITH.mulInt(a, b), parser, pos2, 104);
|
|
check(ARITH.setInt(typeSize, a), parser, pos2, 104);
|
|
t.size := a;
|
|
|
|
t.closed := TRUE
|
|
|
|
ELSIF parser.sym = SCAN.lxRECORD THEN
|
|
getpos(parser, pos2);
|
|
Next(parser);
|
|
|
|
t := program.enterType(program, PROG.tRECORD, 0, 0, unit);
|
|
t.align := 1;
|
|
|
|
IF parser.sym = SCAN.lxLSQUARE THEN
|
|
check1(parser.unit.sysimport, parser, 54);
|
|
Next(parser);
|
|
RecFlag := sysflag(parser);
|
|
IF RecFlag = PROG.noalign THEN
|
|
t.noalign := TRUE
|
|
ELSE
|
|
check1(FALSE, parser, 110)
|
|
END;
|
|
|
|
ExpectSym(parser, SCAN.lxRSQUARE);
|
|
Next(parser)
|
|
END;
|
|
|
|
IF parser.sym = SCAN.lxLROUND THEN
|
|
check1(~t.noalign, parser, 111);
|
|
ExpectSym(parser, SCAN.lxIDENT);
|
|
getpos(parser, pos);
|
|
|
|
type(parser, t.base, {closed});
|
|
|
|
check(t.base.typ IN {PROG.tRECORD, PROG.tPOINTER}, parser, pos, 52);
|
|
|
|
IF t.base.typ = PROG.tPOINTER THEN
|
|
t.base := t.base.base;
|
|
check(t.base # NIL, parser, pos, 55)
|
|
END;
|
|
|
|
check(~t.base.noalign, parser, pos, 112);
|
|
|
|
checklex(parser, SCAN.lxRROUND);
|
|
Next(parser);
|
|
|
|
t.size := t.base.size;
|
|
IF t.base.align > t.align THEN
|
|
t.align := t.base.align
|
|
END
|
|
ELSE
|
|
t.base := program.stTypes.tANYREC
|
|
END;
|
|
|
|
WHILE parser.sym = SCAN.lxIDENT DO
|
|
FieldList(parser, t);
|
|
|
|
ASSERT(parser.sym = SCAN.lxCOLON);
|
|
Next(parser);
|
|
|
|
type(parser, fieldType, {closed});
|
|
check(t.fields.set(t, fieldType), parser, pos2, 104);
|
|
|
|
IF (fieldType.align > t.align) & ~t.noalign THEN
|
|
t.align := fieldType.align
|
|
END;
|
|
|
|
IF parser.sym = SCAN.lxSEMI THEN
|
|
ExpectSym(parser, SCAN.lxIDENT)
|
|
ELSE
|
|
checklex(parser, SCAN.lxEND)
|
|
END
|
|
END;
|
|
|
|
t.closed := TRUE;
|
|
|
|
CODE.AddRec(t.base.num);
|
|
|
|
IF ~t.noalign THEN
|
|
check(MACHINE.Align(t.size, t.align), parser, pos2, 104);
|
|
check(ARITH.setInt(typeSize, t.size), parser, pos2, 104)
|
|
END;
|
|
|
|
checklex(parser, SCAN.lxEND);
|
|
Next(parser)
|
|
|
|
ELSIF parser.sym = SCAN.lxPOINTER THEN
|
|
ExpectSym(parser, SCAN.lxTO);
|
|
Next(parser);
|
|
|
|
t := program.enterType(program, PROG.tPOINTER, program.target.adr, 0, unit);
|
|
t.align := program.target.adr;
|
|
|
|
getpos(parser, pos);
|
|
|
|
IF parser.sym = SCAN.lxIDENT THEN
|
|
baseIdent := parser.lex.ident
|
|
END;
|
|
|
|
type(parser, t.base, {forward});
|
|
|
|
IF t.base # NIL THEN
|
|
check(t.base.typ = PROG.tRECORD, parser, pos, 58)
|
|
ELSE
|
|
unit.pointers.add(unit, t, baseIdent, pos)
|
|
END
|
|
|
|
ELSIF parser.sym = SCAN.lxPROCEDURE THEN
|
|
NextPos(parser, pos);
|
|
t := program.enterType(program, PROG.tPROCEDURE, program.target.adr, 0, unit);
|
|
t.align := program.target.adr;
|
|
t.call := procflag(parser, import, FALSE);
|
|
FormalParameters(parser, t)
|
|
ELSE
|
|
check1(FALSE, parser, 49)
|
|
END
|
|
|
|
END type;
|
|
|
|
|
|
PROCEDURE IdentDef (parser: PARSER; typ: INTEGER; VAR name: SCAN.IDENT): PROG.IDENT;
|
|
VAR
|
|
ident: PROG.IDENT;
|
|
pos: SCAN.POSITION;
|
|
|
|
BEGIN
|
|
ASSERT(parser.sym = SCAN.lxIDENT);
|
|
|
|
name := parser.lex.ident;
|
|
getpos(parser, pos);
|
|
ident := parser.unit.idents.add(parser.unit, name, typ);
|
|
check(ident # NIL, parser, pos, 30);
|
|
ident.pos := pos;
|
|
Next(parser);
|
|
|
|
IF parser.sym = SCAN.lxMUL THEN
|
|
check1(ident.global, parser, 61);
|
|
ident.export := TRUE;
|
|
Next(parser)
|
|
END
|
|
|
|
RETURN ident
|
|
END IdentDef;
|
|
|
|
|
|
PROCEDURE ConstTypeDeclaration (parser: PARSER; const: BOOLEAN);
|
|
VAR
|
|
ident: PROG.IDENT;
|
|
name: SCAN.IDENT;
|
|
pos: SCAN.POSITION;
|
|
|
|
BEGIN
|
|
IF const THEN
|
|
ident := IdentDef(parser, PROG.idNONE, name)
|
|
ELSE
|
|
ident := IdentDef(parser, PROG.idTYPE, name)
|
|
END;
|
|
|
|
checklex(parser, SCAN.lxEQ);
|
|
NextPos(parser, pos);
|
|
|
|
IF const THEN
|
|
ConstExpression(parser, ident.value);
|
|
IF ident.value.typ = ARITH.tINTEGER THEN
|
|
check(ARITH.check(ident.value), parser, pos, 39)
|
|
ELSIF ident.value.typ = ARITH.tREAL THEN
|
|
check(ARITH.check(ident.value), parser, pos, 40)
|
|
END;
|
|
ident.typ := PROG.idCONST;
|
|
ident.type := program.getType(program, ident.value.typ)
|
|
ELSE
|
|
type(parser, ident.type, {})
|
|
END;
|
|
|
|
checklex(parser, SCAN.lxSEMI);
|
|
Next(parser)
|
|
|
|
END ConstTypeDeclaration;
|
|
|
|
|
|
PROCEDURE VarDeclaration (parser: PARSER);
|
|
VAR
|
|
ident: PROG.IDENT;
|
|
name: SCAN.IDENT;
|
|
t: PROG.TYPE_;
|
|
|
|
BEGIN
|
|
|
|
REPEAT
|
|
ident := IdentDef(parser, PROG.idVAR, name);
|
|
|
|
IF parser.sym = SCAN.lxCOMMA THEN
|
|
ExpectSym(parser, SCAN.lxIDENT)
|
|
ELSIF parser.sym = SCAN.lxCOLON THEN
|
|
Next(parser);
|
|
type(parser, t, {});
|
|
parser.unit.setvars(parser.unit, t);
|
|
checklex(parser, SCAN.lxSEMI);
|
|
Next(parser)
|
|
ELSE
|
|
checklex(parser, SCAN.lxCOLON)
|
|
END
|
|
|
|
UNTIL parser.sym # SCAN.lxIDENT
|
|
|
|
END VarDeclaration;
|
|
|
|
|
|
PROCEDURE DeclarationSequence (parser: PARSER): BOOLEAN;
|
|
VAR
|
|
ptr: PROG.FRWPTR;
|
|
endmod: BOOLEAN;
|
|
|
|
|
|
PROCEDURE ProcDeclaration (parser: PARSER): BOOLEAN;
|
|
VAR
|
|
proc: PROG.IDENT;
|
|
endname,
|
|
name: SCAN.IDENT;
|
|
param: LISTS.ITEM;
|
|
unit: PROG.UNIT;
|
|
ident: PROG.IDENT;
|
|
e: EXPR;
|
|
pos: SCAN.POSITION;
|
|
label: INTEGER;
|
|
enter: CODE.COMMAND;
|
|
call: INTEGER;
|
|
t: PROG.TYPE_;
|
|
import: CODE.IMPORT_PROC;
|
|
endmod, b: BOOLEAN;
|
|
fparams: SET;
|
|
variables: LISTS.LIST;
|
|
int, flt: INTEGER;
|
|
|
|
BEGIN
|
|
endmod := FALSE;
|
|
|
|
unit := parser.unit;
|
|
|
|
call := procflag(parser, import, TRUE);
|
|
|
|
getpos(parser, pos);
|
|
checklex(parser, SCAN.lxIDENT);
|
|
|
|
IF import # NIL THEN
|
|
proc := IdentDef(parser, PROG.idIMP, name);
|
|
proc.import := import;
|
|
program.procs.last(PROG.PROC).import := import
|
|
ELSE
|
|
proc := IdentDef(parser, PROG.idPROC, name)
|
|
END;
|
|
|
|
check(unit.scope.open(unit, proc.proc), parser, pos, 116);
|
|
|
|
proc.type := program.enterType(program, PROG.tPROCEDURE, program.target.adr, 0, unit);
|
|
t := proc.type;
|
|
t.align := program.target.adr;
|
|
t.call := call;
|
|
|
|
FormalParameters(parser, t);
|
|
|
|
IF call IN {PROG.systemv, PROG._systemv} THEN
|
|
check(t.params.size <= PROG.MAXSYSVPARAM, parser, pos, 120)
|
|
END;
|
|
|
|
param := t.params.first;
|
|
WHILE param # NIL DO
|
|
ident := unit.idents.add(unit, param(PROG.PARAM).name, PROG.idPARAM);
|
|
ASSERT(ident # NIL);
|
|
ident.type := param(PROG.PARAM).type;
|
|
ident.offset := param(PROG.PARAM).offset;
|
|
IF param(PROG.PARAM).vPar THEN
|
|
ident.typ := PROG.idVPAR
|
|
END;
|
|
param := param.next
|
|
END;
|
|
|
|
checklex(parser, SCAN.lxSEMI);
|
|
Next(parser);
|
|
|
|
IF import = NIL THEN
|
|
|
|
label := CODE.NewLabel();
|
|
proc.proc.label := label;
|
|
|
|
IF parser.main & proc.export & program.dll THEN
|
|
IF program.obj THEN
|
|
check((proc.name.s # "lib_init") & (proc.name.s # "version"), parser, pos, 114)
|
|
END;
|
|
CODE.AddExp(label, proc.name.s);
|
|
proc.proc.used := TRUE
|
|
END;
|
|
|
|
b := DeclarationSequence(parser);
|
|
|
|
program.locsize := 0;
|
|
IF call IN {PROG._win64, PROG.win64} THEN
|
|
fparams := proc.type.params.getfparams(proc.type, 3, int, flt);
|
|
enter := CODE.Enter(label, LSL(ORD(fparams), 5) + MIN(proc.type.params.size, 4))
|
|
ELSIF call IN {PROG._systemv, PROG.systemv} THEN
|
|
fparams := proc.type.params.getfparams(proc.type, PROG.MAXSYSVPARAM - 1, int, flt);
|
|
enter := CODE.Enter(label, -(LSL(ORD(fparams), 5) + proc.type.params.size))
|
|
ELSE
|
|
enter := CODE.Enter(label, 0)
|
|
END;
|
|
proc.proc.enter := enter;
|
|
|
|
IF parser.sym = SCAN.lxBEGIN THEN
|
|
Next(parser);
|
|
parser.StatSeq(parser)
|
|
END;
|
|
|
|
IF t.base # NIL THEN
|
|
checklex(parser, SCAN.lxRETURN);
|
|
NextPos(parser, pos);
|
|
parser.expression(parser, e);
|
|
check(parser.chkreturn(parser, e, t.base, pos), parser, pos, 87)
|
|
END;
|
|
|
|
proc.proc.leave := CODE.Leave(t.base # NIL, (t.base # NIL) & (t.base.typ = PROG.tREAL),
|
|
t.params.size * ORD((t.call IN PROG.callee_clean_up) OR (t.call IN {PROG.systemv, PROG._systemv})));
|
|
enter.param2 := program.locsize;
|
|
checklex(parser, SCAN.lxEND)
|
|
END;
|
|
|
|
IF parser.sym = SCAN.lxEND THEN
|
|
ExpectSym(parser, SCAN.lxIDENT);
|
|
getpos(parser, pos);
|
|
endname := parser.lex.ident;
|
|
IF import = NIL THEN
|
|
check(endname = name, parser, pos, 60);
|
|
ExpectSym(parser, SCAN.lxSEMI);
|
|
Next(parser)
|
|
ELSE
|
|
IF endname = parser.unit.name THEN
|
|
ExpectSym(parser, SCAN.lxPOINT);
|
|
Next(parser);
|
|
endmod := TRUE
|
|
ELSIF endname = name THEN
|
|
ExpectSym(parser, SCAN.lxSEMI);
|
|
Next(parser)
|
|
ELSE
|
|
check(FALSE, parser, pos, 60)
|
|
END
|
|
END
|
|
END;
|
|
|
|
IF import = NIL THEN
|
|
variables := LISTS.create(NIL);
|
|
ELSE
|
|
variables := NIL
|
|
END;
|
|
|
|
unit.scope.close(unit, variables);
|
|
|
|
IF import = NIL THEN
|
|
enter.variables := variables
|
|
END
|
|
|
|
RETURN endmod
|
|
END ProcDeclaration;
|
|
|
|
|
|
BEGIN
|
|
IF parser.sym = SCAN.lxCONST THEN
|
|
Next(parser);
|
|
WHILE parser.sym = SCAN.lxIDENT DO
|
|
ConstTypeDeclaration(parser, TRUE)
|
|
END
|
|
END;
|
|
|
|
IF parser.sym = SCAN.lxTYPE THEN
|
|
Next(parser);
|
|
WHILE parser.sym = SCAN.lxIDENT DO
|
|
ConstTypeDeclaration(parser, FALSE)
|
|
END
|
|
END;
|
|
|
|
ptr := parser.unit.pointers.link(parser.unit);
|
|
IF ptr # NIL THEN
|
|
IF ptr.notRecord THEN
|
|
error(parser, ptr.pos, 58)
|
|
ELSE
|
|
error(parser, ptr.pos, 48)
|
|
END
|
|
END;
|
|
|
|
IF parser.sym = SCAN.lxVAR THEN
|
|
Next(parser);
|
|
IF parser.sym = SCAN.lxIDENT THEN
|
|
VarDeclaration(parser)
|
|
END
|
|
END;
|
|
|
|
endmod := FALSE;
|
|
WHILE ~endmod & (parser.sym = SCAN.lxPROCEDURE) DO
|
|
Next(parser);
|
|
endmod := ProcDeclaration(parser)
|
|
END
|
|
|
|
RETURN endmod
|
|
END DeclarationSequence;
|
|
|
|
|
|
PROCEDURE parse (parser: PARSER);
|
|
VAR
|
|
unit: PROG.UNIT;
|
|
label: INTEGER;
|
|
name: INTEGER;
|
|
endmod: BOOLEAN;
|
|
|
|
BEGIN
|
|
ASSERT(parser # NIL);
|
|
ASSERT(parser.scanner # NIL);
|
|
|
|
ExpectSym(parser, SCAN.lxMODULE);
|
|
ExpectSym(parser, SCAN.lxIDENT);
|
|
|
|
IF ~parser.main THEN
|
|
check1(parser.lex.s = parser.modname, parser, 23)
|
|
END;
|
|
|
|
unit := program.units.create(program.units, parser.lex.ident);
|
|
|
|
parser.unit := unit;
|
|
|
|
ExpectSym(parser, SCAN.lxSEMI);
|
|
|
|
Next(parser);
|
|
IF parser.sym = SCAN.lxIMPORT THEN
|
|
ImportList(parser)
|
|
END;
|
|
|
|
CONSOLE.String("compiling "); CONSOLE.String(unit.name.s);
|
|
IF parser.unit.sysimport THEN
|
|
CONSOLE.String(" (SYSTEM)")
|
|
END;
|
|
CONSOLE.Ln;
|
|
|
|
label := CODE.NewLabel();
|
|
CODE.AddJmpCmd(CODE.opJMP, label);
|
|
|
|
name := CODE.putstr(unit.name.s);
|
|
|
|
CODE.SetErrLabel;
|
|
CODE.AddCmd(CODE.opSADR, name);
|
|
CODE.AddCmd(CODE.opPARAM, 1);
|
|
CODE.AddCmd0(CODE.opERR);
|
|
|
|
endmod := DeclarationSequence(parser);
|
|
|
|
CODE.SetLabel(label);
|
|
|
|
IF ~endmod THEN
|
|
|
|
IF parser.sym = SCAN.lxBEGIN THEN
|
|
Next(parser);
|
|
parser.StatSeq(parser)
|
|
END;
|
|
|
|
checklex(parser, SCAN.lxEND);
|
|
|
|
ExpectSym(parser, SCAN.lxIDENT);
|
|
check1(parser.lex.s = unit.name.s, parser, 25);
|
|
ExpectSym(parser, SCAN.lxPOINT)
|
|
|
|
END;
|
|
|
|
unit.close(unit)
|
|
|
|
END parse;
|
|
|
|
|
|
PROCEDURE open (parser: PARSER; modname: ARRAY OF CHAR): BOOLEAN;
|
|
BEGIN
|
|
ASSERT(parser # NIL);
|
|
|
|
STRINGS.append(parser.fname, modname);
|
|
STRINGS.append(parser.fname, parser.ext);
|
|
STRINGS.append(parser.modname, modname);
|
|
|
|
parser.scanner := SCAN.open(parser.fname)
|
|
|
|
RETURN parser.scanner # NIL
|
|
END open;
|
|
|
|
|
|
PROCEDURE NewParser (): PARSER;
|
|
VAR
|
|
pars: PARSER;
|
|
citem: C.ITEM;
|
|
|
|
BEGIN
|
|
citem := C.pop(parsers);
|
|
IF citem = NIL THEN
|
|
NEW(pars)
|
|
ELSE
|
|
pars := citem(PARSER)
|
|
END
|
|
|
|
RETURN pars
|
|
END NewParser;
|
|
|
|
|
|
PROCEDURE create* (path, lib_path: PATH; StatSeq: STATPROC; expression, designator: EXPRPROC; chkreturn: RETPROC): PARSER;
|
|
VAR
|
|
parser: PARSER;
|
|
|
|
BEGIN
|
|
parser := NewParser();
|
|
|
|
parser.path := path;
|
|
parser.lib_path := lib_path;
|
|
parser.ext := mConst.FILE_EXT;
|
|
parser.fname := path;
|
|
parser.modname := "";
|
|
parser.scanner := NIL;
|
|
parser.unit := NIL;
|
|
parser.constexp := FALSE;
|
|
parser.main := FALSE;
|
|
|
|
parser.open := open;
|
|
parser.parse := parse;
|
|
parser.StatSeq := StatSeq;
|
|
parser.expression := expression;
|
|
parser.designator := designator;
|
|
parser.chkreturn := chkreturn;
|
|
parser.create := create
|
|
|
|
RETURN parser
|
|
END create;
|
|
|
|
|
|
PROCEDURE init* (bit_depth, sys: INTEGER);
|
|
BEGIN
|
|
program := PROG.create(bit_depth, sys);
|
|
parsers := C.create()
|
|
END init;
|
|
|
|
|
|
END PARS. |