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AAEC_COMPILER.pas
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AAEC_COMPILER.pas
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// Modified version of thr AAEC compiler to compile under Free Pascal
(*0001*)(***********************************************************************
0002 * *
0003 * *
0004 * *
0005 * *
0006 * *
0007 * PASCAL 8000 - IBM 360/370 VERSION *
0008 * --------------------------------- *
0009 * *
0010 * LINKAGE EDITOR VERSION *
0011 * ---------------------- *
0012 * *
0013 * *
0014 * VERSION 1.2 *
0015 * ------- *
0016 * *
0017 * DATE: FEBRUARY 1,1978 *
0018 * ---- *
0019 * *
0020 * ORIGINAL AUTHORS: TERUO HIKITA *
0021 * (HITAC VERSION) KIYOSHI ISHIHATA *
0022 * --------------- (UNIVERSITY OF TOKYO) *
0023 * *
0024 * CURRENT AUTHORS: JEFFREY TOBIAS *
0025 * (IBM VERSION) GORDON COX *
0026 * ------------- (AUSTRALIAN ATOMIC ENERGY COMM.)*
0027 * *
0028 * *
0029 * *
0030 * *
0031 * IMPLEMENTATION LANGUAGE: PASCAL 8000/370 *
0032 * ----------------------- *
0033 * *
0034 * *
0035 * *
0036 * *
0037 * DESCRIPTION: *
0038 * ----------- *
0039 * THIS IS A PASCAL 8000 COMPILER DESIGNED TO EXECUTE ON *
0040 * AN IBM SERIES 360 OR 370 COMPUTER (OR EQUIVALENT) *
0041 * UNDER THE OPERATING SYSTEMS OS/MFT,OS/MVT,SVS,VS1,VS2 *
0042 * AND MVS. *
0043 * *
0044 * THE CODE PRODUCED BY THIS VERSION OF THE COMPILER CAN *
0045 * BE PASSED THROUGH THE STANDARD IBM LINKEAGE EDITOR. *
0046 * *
0047 * *
0048 * DATASETS: "INPUT" - PROGRAM TO COMPILE *
0049 * -------- "OUTPUT" - PROGRAM LISTING *
0050 * "$PASMSGS" - ERROR MESSAGE DATASET *
0051 * "SYSGO" - CODE FILE PRODUCED *
0052 * *
0053 ************************************************************************)
// $TITLE PASCAL 8000 COMPILER
// (*0054*) PROGRAM COMPILER(INPUT,OUTPUT,$PASMSGS,SYSGO);
(*0054*) PROGRAM AAEC_COMPILER(INPUT,OUTPUT,_PASMSGS,SYSGO);
(*0055*)(* $L+,P-,T-,N-,U-*)
uses sysutils; // time and date
(*0056*)
(*0057*)
(*0058*)LABEL 9999;
(*0059*)CONST
(*0060*) DISPLIMIT = 20; (*MAX NUMBER OF NESTED SCOPES OF IDENTIFIERS*)
(*0061*) MAXLEVEL = 6; (*MAX NUMBER OF NESTED PROC/FUNCT*)
(*0062*) MAXCHCNT = 121; (* MAX NO OF CHARS ON AN INPUT LINE + 1 *)
(*0063*)
(*0064*)
(*0065*) RESWORDS = 38; (*NUMBER OF RESERVED WORDS*)
(*0066*) NRSTARITH = 6; (* NUMBER OF ARITH FUNCTIONS *)
(*0067*) NRSTDPROC = 18; NRSTDFUNC = 19;
(*0068*) (*NO OF STANDARD PROC,FUNC*)
(*0069*) NRSTDNAMES = 37; (* = PROCS + FUNCS *)
(*0070*) ALFALENG = 8; (*NO OF SIGNIFICANT CHAR IN AN IDENTIFIER*)
(*0071*)
(*0072*)
(*0073*) ORDCHARMAX= 255; (*ORDINAL NUMBER OF THE LAST CHARACTER*)
(*0074*) SETMIN = 0; SETMAX = 63; (*SMALLEST AND LARGEST ELEMENT OF A SET *)
(*0075*) STRGFRL = 4; (*NUMBER OF CHARACTERS IN A STRING FRAGMENT*)
(*0076*) NILVAL = 0; (* = ORD(NIL) *)
(*0077*) MXINT = 2147483647; (*LARGEST INTEGER VALUE*)
(*0078*) MAX10 = 214748364; (* = MXINT DIV 10 *)
(*0079*) LCSTART = 1584; (*INITIAL VALUE OF LOCATION COUNTER IN MAIN PROGR*)
(*0080*) MAXPROCFUNC=256;
(*0081*) MAXPR1 = 257 ; (* = MAXPROCFUNC + 1 *)
(*0082*) CIXMAX = 256; (*MAXIMUM NUMBER OF CASE LABEL*)
(*0083*) TEXTSIZE = 20; (* NEW RUN TIME SYSTEM FILE STRUCTURE *)
(*0084*)
(*0085*) LINESPERPAGE = 60;
(*0086*) INDENT = 14;
(*0087*) MAXMSGSDIV64 = 7;
(*0088*) VERSION = 'AAEC (1ST FEB 78) ';
(*0089*) CODEBLCK= 63; (* 1024 DIV 16 -1 *)
(*0090*) NCODESEGS=96; (* NUMBER OF CODE SEGMENTS *)
(*0091*) CODEPERSEG = 256; (* BYTES PER SEGMENT *)
(*0092*) PTROUTBLCK = 144; (* POINTER TO OUTPUT BLOCK *)
(*0093*) OBJLENGTH = 14;
(*0094*) OBJLENPL1 = 15;
(*0095*) ALLSPACES = 1077952576; (* = INTEGER(' ') *)
(*0096*) RELOC2 = 65536;
(*0097*) RELOC1 = 16777216; (* 256 * 65536 *)
(*0098*) BYTE1SPACE= 1073741824; (* 256 * 65536 * 56(X'40) *)
(*0099*) Z7FE = 134086656; (* X'07FE *)
(*0100*) BYTE2SPACE= 4194304; (* 65536 * 56(X'40) *)
(*0101*) SD = 0;
(*0102*) ER = 2;
(*0103*)
(*0104*)
// moved from VALUES section
// PACKED ARRAY(.0..255,1..4.) OF CHAR
MNEMONIC: ARRAY(.0..255,1..4.) OF CHAR=
(*0470*) (' ', ' ', ' ', 'TRSK', 'SPM ', 'BALR', 'BCTR', 'BCR ',
(*0471*) 'SSK ', 'ISK ', 'SVC ', 'SKC ', ' ', 'BASR', 'SCFR', 'ICFR',
(*0472*) 'LPR ', 'LNR ', 'LTR ', 'LCR ', 'NR ', 'CLR ', 'OR ', 'XR ',
(*0473*) 'LR ', 'CR ', 'AR ', 'SR ', 'MR ', 'DR ', 'ALR ', 'SLR ',
(*0474*) 'LPDR', 'LNDR', 'LTDR', 'LCDR', 'HDR ', 'LRDR', 'MXR ', 'MXDR',
(*0475*) 'LDR ', 'CDR ', 'ADR ', 'SDR ', 'MDR ', 'DDR ', 'AWR ', 'SWR ',
(*0476*) 'LPER', 'LNER', 'LTER', 'LCER', 'HER ', 'LRER', 'AXR ', 'SXR ',
(*0477*) 'LER ', 'CER ', 'AER ', 'SER ', 'MER ', 'DER ', 'AUR ', 'SUR ',
(*0478*) 'STH ', 'LA ', 'STC ', 'IC ', 'EX ', 'BAL ', 'BCT ', 'BC ',
(*0479*) 'LH ', 'CH ', 'AH ', 'SH ', 'MH ', 'BAS ', 'CVD ', 'CVB ',
(*0480*) 'ST ', 'LAE ', 'LS ', 'ICE ', 'N ', 'CL ', 'O ', 'X ',
(*0481*) 'L ', 'C ', 'A ', 'S ', 'M ', 'D ', 'AL ', 'SL ',
(*0482*) 'STD ', ' ', ' ', ' ', ' ', ' ', ' ', 'MXD ',
(*0483*) 'LD ', 'CD ', 'AD ', 'SD ', 'MD ', 'DD ', 'AW ', 'SW ',
(*0484*) 'STE ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
(*0485*) 'LE ', 'CE ', 'AE ', 'SE ', 'ME ', 'DE ', 'AU ', 'SU ',
(*0486*) 'IDL ', 'FGP ', 'PC ', 'DIG ', 'WRD ', 'RDD ', 'BXH ', 'BXLE',
(*0487*) 'SRL ', 'SLL ', 'SRA ', 'SLA ', 'SRDL', 'SLDL', 'SRDA', 'SLDA',
(*0488*) 'STM ', 'TM ', 'MVI ', 'TS ', 'NI ', 'CLI ', 'OI ', 'XI ',
(*0489*) 'LM ', ' ', ' ', ' ', 'SDV ', 'TDV ', 'HDV ', 'CKC ',
(*0490*) 'STMA', 'SKB ', 'PCAS', 'GSK ', ' ', ' ', ' ', ' ',
(*0491*) 'LMA ', 'RTN ', 'TRC ', ' ', ' ', ' ', ' ', ' ',
(*0492*) 'STMC', 'LRA ', ' ', ' ', ' ', ' ', ' ', ' ',
(*0493*) 'LMC ', 'FSK ', ' ', ' ', ' ', ' ', ' ', ' ',
(*0494*) ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
(*0495*) ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
(*0496*) ' ', 'MVN ', 'MVC ', 'MVZ ', 'NC ', 'CLC ', 'OC ', 'XC ',
(*0497*) ' ', ' ', ' ', ' ', 'TR ', 'TRT ', 'ED ', 'EDMK',
(*0498*) ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
(*0499*) ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
(*0500*) ' ', 'MVO ', 'PACK', 'UNPK', ' ', ' ', ' ', ' ',
(*0501*) 'ZAP ', 'CP ', 'AP ', 'SP ', 'MP ', 'DP ', ' ', ' ');
(*0502*) LRW: ARRAY (.0..ALFALENG.) OF 0..RESWORDS=( 0, 0, 6, 14, 22,
29, 34, 35, 38 );
TYPE
(*0107*) ALFA = PACKED ARRAY(.1..ALFALENG.) OF CHAR;
CONST
RW: ARRAY (.1..RESWORDS.) OF ALFA=
(*0504*) ('IF ', 'DO ', 'OF ', 'TO ', 'IN ', 'OR ',
(*0505*) 'END ', 'FOR ', 'VAR ', 'DIV ', 'MOD ', 'SET ',
(*0506*) 'AND ', 'NOT ', 'THEN ', 'ELSE ', 'WITH ', 'GOTO ',
(*0507*) 'CASE ', 'TYPE ', 'FILE ', 'LOOP ', 'BEGIN ', 'UNTIL ',
(*0508*) 'WHILE ', 'ARRAY ', 'CONST ', 'LABEL ', 'VALUE ', 'REPEAT ',
(*0509*) 'RECORD ', 'DOWNTO ', 'PACKED ', 'FORALL ', 'PROGRAM ', 'FUNCTION',
(*0510*) 'POSTLUDE', 'PROCEDUR' );
TYPE
(*0175*)
(*0176*) (* CODE GENERATION STRUCTURES *)
(*0177*) (******************************)
(*0178*)
(*0179*)
(*0180*)
(*0181*)TXTBUF = RECORD
(*0182*) PRELUDE : PACKED ARRAY (.1..4.) OF CHAR;
(*0183*) ADDRESS : INTEGER;
(*0184*) LENGTH : INTEGER;
(*0185*) ID : INTEGER;
(*0186*) TEXTDATA : ARRAY (.1..OBJLENGTH.) OF INTEGER;
(*0187*) SEQNOS : ALFA
(*0188*) END;
(*0189*)
(*0190*)
(*0191*)
(*0192*)ENDBUF = RECORD
(*0193*) PRELUDE : PACKED ARRAY (.1..28.) OF CHAR;
(*0194*) LENGTH : INTEGER;
(*0195*) PSTLUDE : PACKED ARRAY (.1..48.) OF CHAR
(*0196*) END;
(*0197*)
(*0198*)
(*0199*)
(*0200*)ESDDATA = RECORD
(*0201*) NAME : ALFA;
(*0202*) ADDRESS:INTEGER;
(*0203*) LENGTH : INTEGER
(*0204*) END;
(*0205*)
(*0206*)
(*0207*)
(*0208*)ESDBUF = RECORD
(*0209*) PRELUDE : ALFA;
(*0210*) BYTES : INTEGER;
(*0211*) ID : INTEGER;
(*0212*) DATAITEM:ARRAY (.1..3.) OF ESDDATA;
(*0213*) FILLER : ALFA;
(*0214*) SEQNOS : ALFA
(*0215*) END;
(*0216*)
(*0217*)
(*0218*)
(*0219*)
(*0220*)
(*0221*)RLDDATA = RECORD
(*0222*) RELPOS : INTEGER;
(*0223*) FLAGADDRESS : INTEGER
(*0224*) END;
(*0225*)
(*0226*)
(*0227*)RLDBUF = RECORD
(*0228*) PRELUDE : ALFA;
(*0229*) BYTES : INTEGER;
(*0230*) DUMMY : PACKED ARRAY (. 1..4 .) OF CHAR;
(*0231*) RLDITEMS: ARRAY (. 1..7 .) OF RLDDATA;
(*0232*) SEQNOS : ALFA
(*0233*) END;
(*0234*)
// CONST
// Can't preload these buffers, the IBM is a big endian EBCDIC machine
// [initialize in code] no, just postfix before writing
//
VAR
//ESD : ESDBUF;
RLD : RLDBUF= // MAIN RLD BUFFER
(prelude:' RLD '; bytes:0; dummy: ' ';
rlditems:((relpos:0; flagaddress: 0),
(relpos:0; flagaddress: 0),
(relpos:0; flagaddress: 0),
(relpos:0; flagaddress: 0),
(relpos:0; flagaddress: 0),
(relpos:0; flagaddress: 0),
(relpos:0; flagaddress: 0));
seqnos:' ');
(*0402*) ESD : ESDBUF = // MAIN ESD BUFFER
(prelude:' ESD '; bytes:16; id: 1;
dataitem:((name:'P@MAIN@V'; address:0; length:0),
(name:' '; address:0; length:0),
(name:' '; address:0; length:0));
filler: ' '; seqnos:' ' );
TXT : TXTBUF= // MAIN TEXT BUFFER
(prelude: ' TXT'; address:0; length:0; id:0;
textdata:(0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0);
seqnos:' ' );
(*0538 TXT := (#' TXT',0,0,0, 0,0,0,0,
0,0,0,0,
0,0,0,0,
0,0, ' ' #);
*)
ENDC: ENDBUF= // MAIN END BUFFER
(prelude:' END '; length: 0;
pstlude:' ' );
PROCADDRESS : ARRAY (.1..MAXPR1.) OF INTEGER=
(*0550*) ( 0,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
(*0551*) 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
(*0552*) 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
(*0553*) 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
(*0554*) 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
(*0555*) 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
(*0556*) 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
(*0557*) 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
(*0558*) 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
(*0559*) 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
(*0560*) 1,1,1,1,1,1,1 );
(*0561*)
TYPE
(*0114*) SYMBOL = (IDENT,INTCONST,REALCONST,CHARCONST,STRINGCONST,NOTSY,MULOP,
(*0115*) ADDOP,RELOP,LPARENT,RPARENT,LBRACK,RBRACK,LCBRACK,RCBRACK,COMMA,SEMICOLON,
(*0116*) PERIOD,ARROW,COLON,BECOMES,LABELSY,CONSTSY,TYPESY,VARSY,VALUESY,
(*0117*) FUNCTSY,PROCSY,SETSY,PACKEDSY,ARRAYSY,RECORDSY,FILESY,
(*0118*) BEGINSY,IFSY,CASESY,REPEATSY,WHILESY,LOOPSY,FORSY,FORALLSY,WITHSY,
(*0119*) GOTOSY,ENDSY,ELSESY,POSTSY,UNTILSY,OFSY,DOSY,TOSY,DOWNTOSY,
(*0120*) THENSY,PROGRAMSY,EXPONOP,OTHERSY);
CONST
(*0511*) RSY: ARRAY (.1..RESWORDS.) OF SYMBOL =
( IFSY, DOSY, OFSY, TOSY, RELOP, ADDOP,
(*0512*) ENDSY, FORSY, VARSY, MULOP, MULOP, SETSY,
(*0513*) MULOP, NOTSY, THENSY, ELSESY, WITHSY, GOTOSY,
(*0514*) CASESY, TYPESY, FILESY, LOOPSY, BEGINSY, UNTILSY,
(*0515*) WHILESY, ARRAYSY, CONSTSY, LABELSY, VALUESY, REPEATSY,
(*0516*) RECORDSY, DOWNTOSY, PACKEDSY, FORALLSY, PROGRAMSY,FUNCTSY,
(*0517*) POSTSY, PROCSY );
(*0454*) NA: ARRAY (.1..NRSTDNAMES.) OF ALFA=
(*0518*) ('GET ', 'PUT ', 'RESET ', 'REWRITE ',
(*0519*) 'PAGE ', 'READ ', 'READLN ', 'WRITE ',
(*0520*) 'WRITELN ', 'TIME ', 'DATE ', 'NEW ',
(*0521*) 'MARK ', 'RELEASE ', 'PACK ', 'UNPACK ',
(*0522*) 'MESSAGE ', 'HALT ', 'EOF ', 'EOLN ',
(*0523*) 'ODD ', 'ROUND ', 'TRUNC ', 'ABS ',
(*0524*) 'SQR ', 'ORD ', 'CHR ', 'PRED ',
(*0525*) 'SUCC ', 'SIN ', 'COS ', 'EXP ',
(*0526*) 'SQRT ', 'LN ', 'ARCTAN ', 'CLOCK ',
(*0527*) 'CARD ');
// $TITLE GLOBAL TYPES
(*0105*)TYPE
(*0106*)
(*0107*) // ALFA = PACKED ARRAY(.1..ALFALENG.) OF CHAR;
(*0108*) LEVRANGE = 0..8; ADDRRANGE = INTEGER;
(*0109*)
(*0110*)
(*0111*) (*BASIC SYMBOLS*)
(*0112*) (***************)
(*0113*)
(*0121*) &OPERATOR = (MUL,RDIV,ANDOP,IDIV,IMOD,PLUS,MINUS,OROP,LTOP,LEOP,GEOP,
(*0122*) GTOP,NEOP,EQOP,INOP,NOOP);
(*0123*) SETOFSYS = SET OF SYMBOL;
(*0124*)
(*0125*) (*CONSTANTS*)
(*0126*) (***********)
(*0127*)
(*0128*) LOCOFREF = ^LOCREC;
(*0129*) LOCREC=RECORD NXTREF:LOCOFREF;
(*0130*) LOC: ADDRRANGE
(*0131*) END;
(*0132*)
(*0133*) CSTCLASS = (INT,REEL,PSET,STRG);
(*0134*) CTAILP = ^ CSTTAILREC;
(*0135*) STRGFRAG=PACKED ARRAY(.1..4.) OF 0..255;
(*0136*) CSTTAILREC = RECORD NXTCSP: CTAILP; STFR : INTEGER END;
(*0137*)
(*0138*) BASICSET=SET OF SETMIN..SETMAX;
(*0139*) CELLUNIT=1..8;
(*0140*) VALU=RECORD CASE CKIND:CSTCLASS OF
(*0141*) INT: (IVAL: INTEGER);
(*0142*) REEL: (RVAL: REAL);
(*0143*) PSET: (PVAL: BASICSET);
(*0144*) STRG: (VALP: CTAILP)
(*0145*) END;
(*0146*)
(*0147*) (*DATA STRUCTURES*)
(*0148*) (*****************)
(*0149*) STRUCTFORM = (SCALAR,PACKDTYPE,SUBRANGE,POINTER,POWER,ARRAYS,RECORDS,FILES,
(*0150*) TAGFIELD,VARIANT);
(*0151*) DECLKIND = (STANDARD,DECLARED);
(*0152*) WBSIZE=RECORD WBLENGTH:INTEGER; BOUNDARY:CELLUNIT END;
(*0153*) STP = ^ STRUCTREC; CTP = ^ IDENTREC;
(*0154*)
(*0155*) STRUCTREC=RECORD
(*0156*) FTYPE: BOOLEAN; (* TRUE IFF THE STRUCTURE CONTAINS OR IS A FILE *)
(*0157*) SIZE: WBSIZE;
(*0158*) CASE FORM: STRUCTFORM OF
(*0159*) SCALAR: (CASE SCALKIND: DECLKIND OF
(*0160*) DECLARED: (FCONST: CTP));
(*0161*) PACKDTYPE:(BASETYPE:STP);
(*0162*) SUBRANGE: (RANGETYPE: STP; MIN,MAX: INTEGER);
(*0163*) POINTER: (ELTYPE: STP);
(*0164*) POWER: (PCKDSET: BOOLEAN; ELSET: STP);
(*0165*) ARRAYS: (AELTYPE,INXTYPE: STP; AELLENG:INTEGER);
(*0166*) RECORDS: (FIELDS,FSTFLD: CTP;
(*0167*) RECVAR: STP);
(*0168*) FILES: (TEXTFILE:BOOLEAN; FILTYPE:STP);
(*0169*) TAGFIELD: (TGFLDP: CTP; FSTVAR: STP);
(*0170*) VARIANT: (FSTVARFLD: CTP; NXTVAR,SUBVAR: STP;
(*0171*) VARVAL: INTEGER)
(*0172*) END;
(*0173*)
(*0174*)
(*0235*)
(*0236*)
(*0237*)
(*0238*)CARD = PACKED ARRAY (. 1..80 .) OF CHAR;
(*0239*)
(*0240*)
(*0241*)
(*0242*)
(*0243*)
(*0244*) (*NAMES*)
(*0245*) (*******)
(*0246*)
(*0247*) IDCLASS = (TYPES,KONST,VARS,FIELD,EVENT,PROC,FUNC);
(*0248*) SETOFIDS = SET OF IDCLASS;
(*0249*) IDKIND = (ACTUAL,FORMAL);
(*0250*) DRCTINDRCT = (DRCT,INDRCT); (*INDRCT: VARIABLE PARAMETER, WITH STATEMENT*)
(*0251*)
(*0252*) IDENTREC=RECORD
(*0253*) NAME: ALFA; LLINK,RLINK: CTP;
(*0254*) IDTYPE: STP; NEXT: CTP;
(*0255*) CASE KLASS: IDCLASS OF
(*0256*) KONST: (VALUES: VALU);
(*0257*) VARS: (VKIND: DRCTINDRCT; VLEV: LEVRANGE;
(*0258*) VADDR,PARADDR: ADDRRANGE);
(*0259*) FIELD: (FLDADDR: ADDRRANGE);
(*0260*) EVENT: (EVENTJUMP:LOCOFREF; EVENTDEF:BOOLEAN);
(*0261*) PROC,
(*0262*) FUNC: (CASE PFDECKIND: DECLKIND OF
(*0263*) STANDARD: (KEY: 1..NRSTDNAMES);
(*0264*) DECLARED: (PFLEV: LEVRANGE; PARAMS:CTP;
(*0265*) CASE PFKIND: IDKIND OF
(*0266*) ACTUAL: (PFCNT:INTEGER; LCSAVE:ADDRRANGE);
(*0267*) FORMAL: (PFADDR:ADDRRANGE)))
(*0268*) END;
(*0269*)
(*0270*)
(*0271*) CEP=^CSTEXPREC;
(*0272*) CSTEXPREC=RECORD ELEMTYPE:STP; ELEMVALUE:VALU;
(*0273*) NEXTELEM:CEP
(*0274*) END;
(*0275*) FILEP = ^ FILEREC;
(*0276*) FILEREC = RECORD
(*0277*) FILENAME: ALFA; ADDR:ADDRRANGE;
(*0278*) NXTP: FILEP;
(*0279*) DECLARED: BOOLEAN
(*0280*) END;
(*0281*)
(*0282*)
(*0283*) DISPRANGE = 0..DISPLIMIT;
(*0284*) WHERE = (BLCK,REC);
(*0285*)
(*0286*)
(*0287*) (*LABELS*)
(*0288*) (********)
(*0289*) LBP = ^LABREC;
(*0290*) LABREC=RECORD
(*0291*) LABVAL: INTEGER; NEXTLAB: LBP;
(*0292*) LCNT: 0..MAXPROCFUNC;
(*0293*) CASE DEFINED: BOOLEAN OF
(*0294*) TRUE: (LABADDR: ADDRRANGE);
(*0295*) FALSE: (FSTOCC: LOCOFREF)
(*0296*) END;
(*0297*) (*MISCELLANEOUS*)
(*0298*) (***************)
(*0299*) PCRP = ^ PTRCOMPREC; (*POINTER COMPARISON*)
(*0300*) PTRCOMPREC = RECORD NEXT : PCRP; (*TO AVOID INFINITE RECURSION
0301 IN 'COMPTYPES'*)
(*0302*) PTR1,PTR2 : STP
(*0303*) END;
(*0304*) MARKP = ^BOOLEAN; (*MARK AND RELEASE*)
(*0305*) REGNO=(R10,R11,R12,R13,F0,F2,F4,F6);
// copied from VALUES
CONST
(*0453*) REALREG: ARRAY (. REGNO .) OF INTEGER =
(*0503*) ( 10, 11, 12, 13, 0, 2, 4, 6 );
(*0306*)
(*0307*)
(*0308*)(*--------------------------------------------------------------------*)
(*0309*)
// $TITLE GLOBAL VARIABLES
(*0310*)
(*0311*)VAR
(*0312*) (*RETURNED BY SOURCE PROGRAM SCANNER
0313 INSYMBOL:
0314 **********)
(*0315*)
(*0316*) SY: SYMBOL; (*LAST SYMBOL*)
(*0317*) OP: &OPERATOR; (*CLASSIFICATION OF LAST SYMBOL*)
(*0318*) IVAL: INTEGER; (*VALUE OF LAST INTEGER CONSTANT*)
(*0319*) RVAL: REAL; (*VALUE OF LAST REAL CONSTANT*)
(*0320*) CONSTP: CTAILP; (*POINTER TO LAST STRING*)
(*0321*) LGTH: INTEGER; (*LENGTH OF LAST STRING CONSTANT*)
(*0322*) ID: ALFA; (*LAST IDENT (POSSIBLY TRUNCATED)*)
(*0323*) CH: CHAR; (*LAST CHARACTER*)
(*0324*) SWEOL: BOOLEAN; (*END OF LINE CONDITION*)
(*0325*) DOTDOT : BOOLEAN;
(*0326*) DOTFLG : BOOLEAN;
(*0327*)
(*0328*)
(*0329*) (*COUNTERS:*)
(*0330*) (***********)
(*0331*)
(*0332*) CHCNT: INTEGER; (*CHARACTER COUNTER*)
(*0333*) LC,IC: ADDRRANGE; (*DATA LOCATION AND INSTR COUNTER*)
(*0334*) PCNT: INTEGER; (*NUMBER OF PROCSY/FUNCTIONS*)
(*0335*) PROGCOUNT:INTEGER; (*GLOBAL INSTRUCTION COUNTER*)
(*0336*)
(*0337*)
(*0338*) (*SWITCHES:*)
(*0339*) (***********)
(*0340*)
(*0341*) PRTERR: BOOLEAN; (*TO ALLOW FORWARD REFERENCES
0342 BY SUPPRESSING ERROR MESSAGE*)
(*0343*) DEBUG,LISTON,PMD,PRINTCODE,EXTWARN : BOOLEAN; (* $ SWITCHES *)
(*0344*)
(*0345*)
(*0346*) (*POINTERS:*)
(*0347*) (***********)
(*0348*) INTPTR,REALPTR,CHARPTR,ALFAPTR,
(*0349*) BOOLPTR,NILPTR,TEXTPTR: STP; (*POINTERS TO ENTRIES OF STD IDS*)
(*0350*) PACKDINTPTR,PACKDCHARPTR:STP;
(*0351*) UTYPPTR,UCSTPTR,UVARPTR,
(*0352*) UFLDPTR,UPRCPTR,UFCTPTR, (*POINTERS TO ENTRIES FOR UNDECL IDS*)
(*0353*) UEVENTPTR,
(*0354*) INPUTPTR,OUTPUTPTR, (*ENTRIES FOR INPUT AND OUTPUT*)
(*0355*) FWPTR: CTP; (*HEAD OF CHAIN OF FORW TYPE IDS*)
(*0356*) FSTLABP : LBP; (*HEAD OF LABEL CHAIN*)
(*0357*) FEXFILP,LOCFILP: FILEP; (*HEAD OF LIST OF EXTERNAL/LOCAL FILES*)
(*0358*) FSTPCRP : PCRP; (*HEAD OF LIST OF POINTER COMPARISON*)
(*0359*)
(*0360*)
(*0361*) (*BOOKKEEPING OF DECLARATION LEVELS:*)
(*0362*) (************************************)
(*0363*)
(*0364*) LEVEL: LEVRANGE; (*CURRENT STATIC LEVEL*)
(*0365*) DISX, (*LEVEL OF LAST ID SRCHD BY SEARCHID*)
(*0366*) TOP: DISPRANGE; (*TOP OF DISPLAY*)
(*0367*)
(*0368*) DISPLAY: (*WHERE: MEANS:*)
(*0369*) ARRAY (.DISPRANGE.) OF
(*0370*) RECORD (*=BLCK: ID IS VARIABLE ID*)
(*0371*) FNAME: CTP; (*=REC: ID IS FIELD ID IN RECORD*)
(*0372*) CASE OCCUR: WHERE OF
(*0373*) REC: (DADRS:ADDRRANGE;
(*0374*) CASE DISPKIND:DRCTINDRCT OF
(*0375*) DRCT: (DLEVEL:LEVRANGE);
(*0376*) INDRCT: (DBASEL:LEVRANGE; DBASEA:ADDRRANGE))
(*0377*) END;
(*0378*)
(*0379*) (* LISTING CONTROLS *)
(*0380*) (********************)
(*0381*)
(*0382*)LEFT,RIGHT,PROCLEV : CHAR; (*NESTING LEVEL INDICATORS *)
(*0383*)LOCATION : INTEGER; (*OFFSET AT EOL *)
(*0384*)DDATE,TTIME : ALFA; (*DATE AND TIME FOR NEWPAGE*)
(*0385*)PAGEE : INTEGER; (*PAGE COUNTER *)
(*0386*)ZLEV : INTEGER; (*NESTING LEVEL COUNTER *)
(*0387*)TTL : PACKED ARRAY(.1..40.)
(*0388*) OF CHAR; (*TITLE BUFFER *)
(*0389*)PRINTED : INTEGER; (*INTEGER *)
(*0390*)MAXLINE : 0..MAXCHCNT; (* MAX NO OF INPUT CHARACTERS *)
(*0391*)LINEE : INTEGER; (* NO OF LINES PRINTED *)
(*0392*)DP : BOOLEAN;
(*0393*)MAXLN : BOOLEAN;
(*0394*)
(*0395*)
(*0396*)
(*0397*) (* OBJECT FILE GENERATION *)
(*0398*) (**************************)
(*0399*)
(*0400*)
(*0405*)
(*0406*)ESDID : 1..256; (* ESD IDENTIFIER *)
(*0407*)ESDCNT:0..256;
(*0408*)RLDPOS:INTEGER;
(*0409*)CURRADDRESS : INTEGER; (* OFFSET FROM START OF TXT BLOCK FOR SD *)
(*0410*)OBJECTCODE : ARRAY (.1..OBJLENGTH.) OF INTEGER; (* CODE STORE *)
(*0411*)EXTPROCS : 0..MAXPROCFUNC;
(*0412*)EXTARRAY : PACKED ARRAY (.0..MAXPROCFUNC.) OF
(*0413*) RECORD
(*0414*) ENAME:ALFA;
(*0415*) ECNT : 0..MAXPROCFUNC
(*0416*) END;
(*0417*)EXTRNL : BOOLEAN; (* SET FOR EXTERNAL COMPILATIONS *)
(*0418*)PROCNAMES : BOOLEAN; (* FOR PROC NAME INFORMATION *)
(*0419*)PROCREF : ALFA; (* STORES LAST PROC COMPILED *)
(*0420*)INITFLAG : BOOLEAN;
(*0421*)STDPRCS : ARRAY(.1..NRSTARITH.) OF ALFA; (* FOR ARITH FUNCTS *)
(*0422*)
(*0423*)
(*0424*) (*ERROR MESSAGES:*)
(*0425*) (*****************)
(*0426*)
(*0427*) ERRINX: 0..10; (*NR OF ERRORS IN CURR SOURCE LINE*)
(*0428*) ERRORS: BOOLEAN; (*TRUE IFF THE PROGRAM CONTAINS AN ERROR*)
(*0429*) ERRLIST:
(*0430*) ARRAY (.1..10.) OF
(*0431*) RECORD POS: 1..MAXCHCNT;
(*0432*) NMR: 1..400
(*0433*) END;
(*0434*)
(*0435*)ERRORTOT : INTEGER; (* TOTAL NUMBER OF LINES IN ERROR *)
(*0436*) _PASMSGS : TEXT; (* PASCAL ERROR MESSAGE FILE *)
(*0437*)ERRMSGS : ARRAY (. 0 .. MAXMSGSDIV64 .)
(*0438*) OF SET OF SETMIN..SETMAX;
(*0439*)
(*0440*)
(*0441*)
(*0442*) (*STRUCTURED CONSTANTS:*)
(*0443*) (***********************)
(*0444*)
(*0445*) CONSTBEGSYS,SIMPTYPEBEGSYS,TYPEBEGSYS,BLOCKBEGSYS,SELECTSYS,FACBEGSYS,
(*0446*) STATBEGSYS,TYPEDELS: SETOFSYS;
(*0447*) // LRW: ARRAY (.0..ALFALENG.) OF 0..RESWORDS;
(*0448*) // RW: ARRAY (.1..RESWORDS.) OF ALFA;
(*0449*) // RSY: ARRAY (.1..RESWORDS.) OF SYMBOL;
(*0450*) ROP: ARRAY (.1..RESWORDS.) OF &OPERATOR;
(*0451*) SSY : ARRAY (.' '..'A'.) OF SYMBOL;
(*0452*) SOP: ARRAY (.' '..'"'.) OF &OPERATOR;
(*0453*)// REALREG: ARRAY (. REGNO .) OF INTEGER;
(*0454*)// NA: ARRAY (.1..NRSTDNAMES.) OF ALFA;
(*0455*) BMASK: ARRAY(.LTOP..EQOP.) OF INTEGER;
(*0456*) DUALOP: ARRAY(.LTOP..EQOP.) OF LTOP..EQOP;
(*0457*) // MNEMONIC: PACKED ARRAY(.0..255,1..4.) OF CHAR;
(*0458*) CHTYPE: PACKED ARRAY(.CHAR.) OF (SPCHAR,LETTER,DIGIT);
(*0459*) (*OUTPUT BUFFER:*)
(*0460*) (****************)
(*0461*) LINE : PACKED ARRAY(.1..MAXCHCNT.) OF CHAR;
(*0462*)
(*0464*) SYSGO : FILE OF CARD; (* OUTPUT FILE *)
(*0465*) INITNUMBER,OBPOINTER: INTEGER;
(*0466*)
(*0467*)
// $TITLE GLOBAL VALUES
(*0468 VALUE
0469 MNEMONIC:=
0470 (#' ', ' ', ' ', 'TRSK', 'SPM ', 'BALR', 'BCTR', 'BCR ',
0471 'SSK ', 'ISK ', 'SVC ', 'SKC ', ' ', 'BASR', 'SCFR', 'ICFR',
0472 'LPR ', 'LNR ', 'LTR ', 'LCR ', 'NR ', 'CLR ', 'OR ', 'XR ',
0473 'LR ', 'CR ', 'AR ', 'SR ', 'MR ', 'DR ', 'ALR ', 'SLR ',
0474 'LPDR', 'LNDR', 'LTDR', 'LCDR', 'HDR ', 'LRDR', 'MXR ', 'MXDR',
0475 'LDR ', 'CDR ', 'ADR ', 'SDR ', 'MDR ', 'DDR ', 'AWR ', 'SWR ',
0476 'LPER', 'LNER', 'LTER', 'LCER', 'HER ', 'LRER', 'AXR ', 'SXR ',
0477 'LER ', 'CER ', 'AER ', 'SER ', 'MER ', 'DER ', 'AUR ', 'SUR ',
0478 'STH ', 'LA ', 'STC ', 'IC ', 'EX ', 'BAL ', 'BCT ', 'BC ',
0479 'LH ', 'CH ', 'AH ', 'SH ', 'MH ', 'BAS ', 'CVD ', 'CVB ',
0480 'ST ', 'LAE ', 'LS ', 'ICE ', 'N ', 'CL ', 'O ', 'X ',
0481 'L ', 'C ', 'A ', 'S ', 'M ', 'D ', 'AL ', 'SL ',
0482 'STD ', ' ', ' ', ' ', ' ', ' ', ' ', 'MXD ',
0483 'LD ', 'CD ', 'AD ', 'SD ', 'MD ', 'DD ', 'AW ', 'SW ',
0484 'STE ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
0485 'LE ', 'CE ', 'AE ', 'SE ', 'ME ', 'DE ', 'AU ', 'SU ',
0486 'IDL ', 'FGP ', 'PC ', 'DIG ', 'WRD ', 'RDD ', 'BXH ', 'BXLE',
0487 'SRL ', 'SLL ', 'SRA ', 'SLA ', 'SRDL', 'SLDL', 'SRDA', 'SLDA',
0488 'STM ', 'TM ', 'MVI ', 'TS ', 'NI ', 'CLI ', 'OI ', 'XI ',
0489 'LM ', ' ', ' ', ' ', 'SDV ', 'TDV ', 'HDV ', 'CKC ',
0490 'STMA', 'SKB ', 'PCAS', 'GSK ', ' ', ' ', ' ', ' ',
0491 'LMA ', 'RTN ', 'TRC ', ' ', ' ', ' ', ' ', ' ',
0492 'STMC', 'LRA ', ' ', ' ', ' ', ' ', ' ', ' ',
0493 'LMC ', 'FSK ', ' ', ' ', ' ', ' ', ' ', ' ',
0494 ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
0495 ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
0496 ' ', 'MVN ', 'MVC ', 'MVZ ', 'NC ', 'CLC ', 'OC ', 'XC ',
0497 ' ', ' ', ' ', ' ', 'TR ', 'TRT ', 'ED ', 'EDMK',
0498 ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
0499 ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ',
0500 ' ', 'MVO ', 'PACK', 'UNPK', ' ', ' ', ' ', ' ',
0501 'ZAP ', 'CP ', 'AP ', 'SP ', 'MP ', 'DP ', ' ', ' '#); *)
(*0502*)// LRW:=(# 0, 0, 6, 14, 22, 29, 34, 35, 38 #);
(*0503*)// REALREG:=(# 10, 11, 12, 13, 0, 2, 4, 6 #);
{
(*0504*) RW:=(#'IF ', 'DO ', 'OF ', 'TO ', 'IN ', 'OR ',
(*0505*) 'END ', 'FOR ', 'VAR ', 'DIV ', 'MOD ', 'SET ',
(*0506*) 'AND ', 'NOT ', 'THEN ', 'ELSE ', 'WITH ', 'GOTO ',
(*0507*) 'CASE ', 'TYPE ', 'FILE ', 'LOOP ', 'BEGIN ', 'UNTIL ',
(*0508*) 'WHILE ', 'ARRAY ', 'CONST ', 'LABEL ', 'VALUE ', 'REPEAT ',
(*0509*) 'RECORD ', 'DOWNTO ', 'PACKED ', 'FORALL ', 'PROGRAM ', 'FUNCTION',
(*0510*) 'POSTLUDE', 'PROCEDUR' #);
(*0511*) RSY:=(#IFSY, DOSY, OFSY, TOSY, RELOP, ADDOP,
(*0512*) ENDSY, FORSY, VARSY, MULOP, MULOP, SETSY,
(*0513*) MULOP, NOTSY, THENSY, ELSESY, WITHSY, GOTOSY,
(*0514*) CASESY, TYPESY, FILESY, LOOPSY, BEGINSY, UNTILSY,
(*0515*) WHILESY, ARRAYSY, CONSTSY, LABELSY, VALUESY, REPEATSY,
(*0516*) RECORDSY, DOWNTOSY, PACKEDSY, FORALLSY, PROGRAMSY,FUNCTSY,
(*0517*) POSTSY, PROCSY #);
(*0518*) NA:=(#'GET ', 'PUT ', 'RESET ', 'REWRITE ',
(*0519*) 'PAGE ', 'READ ', 'READLN ', 'WRITE ',
(*0520*) 'WRITELN ', 'TIME ', 'DATE ', 'NEW ',
(*0521*) 'MARK ', 'RELEASE ', 'PACK ', 'UNPACK ',
(*0522*) 'MESSAGE ', 'HALT ', 'EOF ', 'EOLN ',
(*0523*) 'ODD ', 'ROUND ', 'TRUNC ', 'ABS ',
(*0524*) 'SQR ', 'ORD ', 'CHR ', 'PRED ',
(*0525*) 'SUCC ', 'SIN ', 'COS ', 'EXP ',
(*0526*) 'SQRT ', 'LN ', 'ARCTAN ', 'CLOCK ',
(*0527*) 'CARD '#);
}
(*0528*)
(*0529*)
(*0530*)
(*0562*)
(*0563*)(*--------------------------------------------------------------------*)
(*0564*)
(*0565*)
procedure page(Var f:text); begin end;
// $TITLE LEXICAL ANALYSER
(*0566*)PROCEDURE NEWPAGE;
(*0567*) VAR I,J : INTEGER;
(*0568*)BEGIN
(*0569*) PAGE(OUTPUT);
(*0570*) WRITELN(' PASCAL 8000/1.2',
(*0571*) VERSION :22,' ':3,TTL:40,' ':11,DDATE,' AT ',
(*0572*) TTIME,' PAGE ',PAGEE:4);
(*0573*) WRITELN;
(*0574*) PAGEE := PAGEE+1;
(*0575*) LINEE := 2;
(*0576*)END; (* NEWPAGE *)
(*0577*)
(*0578*)
(*0579*)PROCEDURE ENDOFLINE; FORWARD;
(*0580*)
(*0581*)
(*0582*)
(*0583*)PROCEDURE RIGHTCHECK;
(*0584*)BEGIN
(*0585*) RIGHT := CHR(ORD('0') + ZLEV MOD 10);
(*0586*) ZLEV := ZLEV - 1
(*0587*) END;
(*0588*)PROCEDURE LEFTCHECK;
(*0589*)BEGIN
(*0590*) ZLEV:=ZLEV+1;
(*0591*) IF LEFT = '-' THEN LEFT:=CHR(ORD('0')+ZLEV MOD 10)
(*0592*)END;
(*0593*)
(*0594*)
(*0595*)PROCEDURE WRITEHEX(X:INTEGER);
(*0596*) VAR I,N,C : INTEGER;
(*0597*) L:INTEGER;
(*0598*)BEGIN
(*0599*) IF X < 65636 THEN BEGIN L:=4;N:=4096 END ELSE
(*0600*) IF X < 1050176 THEN BEGIN L := 5; N:=65636 END ELSE
(*0601*) BEGIN L := 6; N := 1050176 END;
(*0602*) WRITE(' ':6-L);
(*0603*) FOR I := 1 TO L DO
(*0604*) BEGIN C:=X DIV N;
(*0605*) IF C>= 10 THEN WRITE(CHR(C-10+ORD('A')))
(*0606*) ELSE WRITE(CHR(C+ORD('0')));
(*0607*) X:=X MOD N; N:=N DIV 16
(*0608*) END
(*0609*)END; (*WRITEHEX *)
(*0610*)
(*0611*)
(*0612*)PROCEDURE OPTCARD;
(*0613*) VAR I:INTEGER;
(*0614*) C : CHAR;
(*0615*)BEGIN (*OPTCARD*)
(*0616*) READ(CH);
(*0617*) IF NOT EOLN(INPUT) THEN
(*0618*) BEGIN
(*0619*) READ(CH);
(*0620*) IF CH = 'E' THEN LINEE := LINESPERPAGE (*EJECT *)
(*0621*) ELSE
(*0622*) IF CH = 'S' THEN
(*0623*) BEGIN IF LISTON THEN BEGIN C:=' ';WHILE NOT EOLN(INPUT) AND (C=' ') DO
(*0624*) BEGIN READ(CH); IF (CH>='0') AND (CH<='9') THEN
(*0625*) FOR C:='1' TO CH DO BEGIN ENDOFLINE;WRITELN END
(*0626*) END
(*0627*) END
(*0628*) END
(*0629*) ELSE
(*0630*) IF CH = 'T' THEN
(*0631*) BEGIN
(*0632*) REPEAT READ(CH) UNTIL (CH = ' ') OR EOLN(INPUT);
(*0633*) WHILE (NOT EOLN(INPUT)) AND (CH=' ') DO READ(CH);
(*0634*) FOR I:=1 TO 40 DO BEGIN TTL(.I.):=CH;
(*0635*) IF EOLN(INPUT) THEN CH:=' ' ELSE READ(CH);
(*0636*) END; LINEE := LINESPERPAGE;
(*0637*) END ELSE IF CH ='U' THEN LINEE:=LINESPERPAGE+1
(*0638*) END; READLN
(*0639*)END; (*OPTCARD *)
(*0640*)
(*0641*)
(*0642*)PROCEDURE WRITERRORS;
(*0643*) VAR I : INTEGER;
(*0644*) LASTPOS,FREEPOS,CURRPOS,CURRNMR,F,K: INTEGER;
(*0645*) FLAG:BOOLEAN;
(*0646*)BEGIN
(*0647*) FLAG:=FALSE;
(*0648*) ENDOFLINE;
(*0649*) FOR K:=1 TO ERRINX DO
(*0650*) IF ERRLIST(. K .).NMR <> 291 THEN FLAG:=TRUE;
(*0651*) IF FLAG THEN WRITE(' ***ERROR***':INDENT) ELSE
(*0652*) WRITE(' **WARNING**':INDENT);
(*0653*) LASTPOS := 0; FREEPOS := 1;
(*0654*) FOR K := 1 TO ERRINX DO
(*0655*) BEGIN
(*0656*) WITH ERRLIST(.K.) DO
(*0657*) BEGIN CURRPOS := POS; CURRNMR := NMR END;
(*0658*) IF CURRPOS = LASTPOS THEN WRITE(',')
(*0659*) ELSE
(*0660*) BEGIN
(*0661*) IF FREEPOS > CURRPOS THEN
(*0662*) BEGIN
(*0663*) WRITELN;
(*0664*) ENDOFLINE; WRITE(' ':INDENT);
(*0665*) FREEPOS:=1
(*0666*) END;
(*0667*) WHILE FREEPOS < CURRPOS DO
(*0668*) BEGIN WRITE(' '); FREEPOS := FREEPOS + 1 END;
(*0669*) WRITE('^'); LASTPOS:=CURRPOS;
(*0670*) END;
(*0671*) IF CURRNMR < 10 THEN F := 1
(*0672*) ELSE IF CURRNMR < 100 THEN F := 2
(*0673*) ELSE F := 3;
(*0674*) WRITE(CURRNMR:F);
(*0675*) FREEPOS := FREEPOS + F + 1
(*0676*) END;
(*0677*) WRITELN; ERRINX := 0
(*0678*) END;
(*0679*)
(*0680*) PROCEDURE ERROR(FERRNR: INTEGER);
(*0681*) VAR
(*0682*) ERRCNT : INTEGER;
(*0683*) BEGIN
(*0684*) IF FERRNR <> 291 THEN
(*0685*) ERRORS:=TRUE;
(*0686*) IF FERRNR = 400 THEN
(*0687*) BEGIN
(*0688*) ENDOFLINE; WRITELN(' ***** COMPILER ERROR *****'); HALT
(*0689*) END;
(*0690*) IF ERRINX = 0 THEN ERRORTOT := ERRORTOT + 1;
(*0691*) IF ERRINX >= 9 THEN
(*0692*) BEGIN ERRLIST(.10.).NMR := 255; ERRINX := 10 END
(*0693*) ELSE
(*0694*) BEGIN ERRINX := ERRINX + 1;
(*0695*) ERRLIST(.ERRINX.).NMR := FERRNR
(*0696*) END;
(*0697*) ERRCNT := ERRLIST(. ERRINX .).NMR;
(*0698*) ERRMSGS(. ERRCNT DIV 64 .) :=
(*0699*) ERRMSGS(. ERRCNT DIV 64 .) + (.ERRCNT MOD 64 .);
(*0700*) ERRLIST(.ERRINX.).POS := CHCNT
(*0701*) END;
(*0702*)
(*0703*) FUNCTION BYTEPACK(X:STRGFRAG):INTEGER;
(*0704*) BEGIN BYTEPACK:=256*(256*(256*X(.1.)+X(.2.))+X(.3.))+X(.4.);
(*0705*) END;
(*0706*)
(*0707*) PROCEDURE BYTEUNPACK(VAR X:STRGFRAG; V:INTEGER);
(*0708*) VAR W: RECORD CASE FLAG:BOOLEAN OF
(*0709*) TRUE: (STR: STRGFRAG);
(*0710*) FALSE: (INT: INTEGER)
(*0711*) END;
(*0712*) BEGIN W.INT:=V; X:=W.STR; END;
(*0713*)
(*0714*) PROCEDURE SETVALUE(X:BASICSET; VAR I1,I2:INTEGER);
(*0715*) VAR W: RECORD DUMMY:INTEGER;
(*0716*) CASE FLAG:BOOLEAN OF
(*0717*) FALSE: (S: BASICSET);
(*0718*) TRUE: (A1,A2: INTEGER)
(*0719*) END;
(*0720*) BEGIN W.S:=X; I1:=W.A1; I2:=W.A2; END;
(*0721*)
(*0722*) PROCEDURE HALFWORD(X:INTEGER; VAR X1,X2:INTEGER);
(*0723*) BEGIN
(*0724*) IF X>=0 THEN
(*0725*) BEGIN X1:=X DIV 65536;
(*0726*) X2:=X MOD 65536;
(*0727*) END
(*0728*) ELSE IF X MOD 65536=0 THEN
(*0729*) BEGIN X1:=X DIV 65536+65536;
(*0730*) X2:=0;
(*0731*) END
(*0732*) ELSE
(*0733*) BEGIN X1:=X DIV 65536+65535;
(*0734*) X2:=X MOD 65536+65536;
(*0735*) END;
(*0736*) END;
(*0737*)
(*0738*)PROCEDURE ENDOFLINE;
(*0739*) VAR I : INTEGER;
(*0740*)BEGIN
(*0741*) IF CHCNT > PRINTED THEN
(*0742*) BEGIN
(*0743*) IF LISTON OR (ERRINX>0) THEN
(*0744*) BEGIN
(*0745*) IF LINEE = LINESPERPAGE THEN NEWPAGE;
(*0746*) LINEE := LINEE + 1;
(*0747*) WRITE(' ');
(*0748*) WRITEHEX(LOCATION);
(*0749*) WRITE(' ',LEFT,RIGHT,' ',PROCLEV,' ':PRINTED+2);
(*0750*) FOR I:=PRINTED+1 TO CHCNT DO
(*0751*) IF I <= MAXCHCNT THEN WRITE(LINE(.I.));
(*0752*) WRITELN
(*0753*) END;
(*0754*) LEFT:='-'; RIGHT:='-';PROCLEV:=' ';PRINTED:=CHCNT;
(*0755*) IF ERRINX>0 THEN WRITERRORS
(*0756*) END ELSE
(*0757*) BEGIN
(*0758*) IF LINEE = LINESPERPAGE THEN NEWPAGE;
(*0759*) LINEE:=LINEE+1;
(*0760*) END;
(*0761*) IF DP THEN LOCATION:= LC ELSE LOCATION := IC;
(*0762*)END;(*ENDOFLINE*)
(*0763*) PROCEDURE INSYMBOL; // Scanner
(*0764*) LABEL 1,2;
(*0765*) (*READ NEXT BASIC SYMBOL OF SOURCE PROGRAM AND RETURN ITS DESCRIPTION
0766 IN THE GLOBAL VARIABLES SY, OP, ID, IVAL, RVAL, SVAL AND LGTH*)
(*0767*) CONST ONE=1E0; TEN=10E0;
(*0768*) VAR I,K,SCALE,EXP: INTEGER;
(*0769*) R,FAC: REAL; SIGN: BOOLEAN; SF:STRGFRAG;
(*0770*) NXTP,TAILP:CTAILP;
(*0771*)
(*0772*)PROCEDURE NEXTCH;
(*0773*)BEGIN
(*0774*) REPEAT
(*0775*) IF SWEOL THEN
(*0776*) BEGIN
(*0777*) ENDOFLINE;
(*0778*) REPEAT
(*0779*) IF EOF(INPUT) THEN
(*0780*) BEGIN
(*0781*) ENDOFLINE; WRITELN;
(*0782*) ENDOFLINE; WRITELN(' *** WARNING - PREMATURE PROGRAM EOF ***');
(*0783*) ERRORS:=TRUE;
(*0784*) { GOTO 9999 } Halt(1);
(*0785*) END ELSE
(*0786*) BEGIN
// options at start of line not used
//(*0787*) IF INPUT^ = '$' THEN OPTCARD ELSE
// (*0788*) BEGIN
CHCNT:=0; PRINTED:=0; SWEOL:=FALSE;
// END;
(*0789*) END
(*0790*) UNTIL NOT SWEOL
(*0791*) END;
(*0792*) SWEOL:=EOLN(INPUT); READ(CH); IF CHCNT=MAXCHCNT THEN ERROR(180);
(*0793*) CHCNT:=CHCNT+1; IF CHCNT <= MAXCHCNT THEN LINE(.CHCNT.):=CH;
(*0794*) UNTIL SWEOL OR (CHCNT<= MAXLINE);
(*0795*)END; (*NEXTCH *)
(*0796*)
(*0797*) PROCEDURE OPTIONS;
(*0798*) VAR CH1:CHAR;
(*0799*)
(*0800*) PROCEDURE SETOPTION(VAR F:BOOLEAN; C:CHAR);
(*0801*) BEGIN IF CH1=C THEN
(*0802*) IF (CH='+') OR (CH='-') THEN F:=(CH='+');
(*0803*) END;
(*0804*)
(*0805*) BEGIN
(*0806*) REPEAT NEXTCH; CH1:=CH; NEXTCH;
(*0807*) SETOPTION(PRINTCODE,'C'); SETOPTION(LISTON,'L');
(*0808*) SETOPTION(PMD,'P'); SETOPTION(DEBUG,'T');
(*0809*) SETOPTION(MAXLN,'U');
(*0810*) IF EXTRNL AND (CH1='E') THEN
(*0811*) ERROR(382) ELSE SETOPTION(EXTRNL,'E');
(*0812*) SETOPTION(PROCNAMES,'N');
(*0813*) SETOPTION(EXTWARN,'S');
(*0814*) IF MAXLN THEN MAXLINE:=72 ELSE MAXLINE:=MAXCHCNT;
(*0815*) NEXTCH;
(*0816*) UNTIL CH<>',';
(*0817*) END;
(*0818*)
(*0819*) BEGIN (*INSYMBOL*) // Scanner
(*0820*) 1:
(*0821*) WHILE CH=' ' DO NEXTCH; // skip whitespace
(*0822*) IF CHTYPE(.CH.)=LETTER THEN // if it's an identifier
(*0823*) BEGIN K:=0; ID:=' ';
(*0824*) REPEAT
(*0825*) IF K < ALFALENG THEN
(*0826*) BEGIN K:=K+1; ID(.K.):=CH; END;
(*0827*) NEXTCH;
(*0828*) UNTIL CHTYPE(.CH.)=SPCHAR;
(*0829*) FOR I := LRW(.K-1.) + 1 TO LRW(.K.) DO
(*0830*) IF RW(.I.) = ID THEN // if it matches a keyword
(*0831*) BEGIN SY := RSY(.I.); OP := ROP(.I.); GOTO 2 END;
(*0832*) SY := IDENT; OP := NOOP;
(*0833*) 2: END
(*0834*) ELSE IF (CH>='0') AND (CH<='9') THEN
(*0835*) BEGIN SY := INTCONST; OP := NOOP;
(*0836*) IVAL:=0;
(*0837*) REPEAT
(*0838*) IF IVAL<MAX10
(*0839*) THEN IVAL:=IVAL*10+(ORD(CH)-ORD('0'))
(*0840*) ELSE IF (IVAL>MAX10) OR (CH>='8')
(*0841*) THEN BEGIN ERROR(203); IVAL:=0; END
(*0842*) ELSE IVAL:=IVAL*10+(ORD(CH)-ORD('0'));
(*0843*) NEXTCH;
(*0844*) UNTIL (CH<'0') OR (CH>'9');
(*0845*) SCALE := 0;
(*0846*) IF CH = '.' THEN
(*0847*) BEGIN NEXTCH;
(*0848*) IF CH = '.' THEN BEGIN DOTFLG:=TRUE; CH:=':' END
(*0849*) ELSE IF CH=')' THEN CH:='%'
(*0850*) ELSE
(*0851*) BEGIN RVAL := IVAL; SY := REALCONST;
(*0852*) IF (CH<'0') OR (CH>'9') THEN ERROR(201)
(*0853*) ELSE
(*0854*) REPEAT RVAL := TEN*RVAL + (ORD(CH)-ORD('0'));
(*0855*) SCALE := SCALE - 1; NEXTCH
(*0856*) UNTIL (CH<'0') OR (CH>'9')
(*0857*) END
(*0858*) END;
(*0859*) IF CH = 'E' THEN
(*0860*) BEGIN
(*0861*) IF SCALE = 0 THEN
(*0862*) BEGIN RVAL := IVAL; SY := REALCONST END;
(*0863*) SIGN := FALSE; NEXTCH;
(*0864*) IF CH = '+' THEN NEXTCH
(*0865*) ELSE
(*0866*) IF CH = '-' THEN
(*0867*) BEGIN SIGN := TRUE; NEXTCH END;
(*0868*) EXP := 0;
(*0869*) IF (CH<'0') OR (CH>'9') THEN ERROR(201)
(*0870*) ELSE
(*0871*) REPEAT EXP := 10*EXP + (ORD(CH)-ORD('0'));
(*0872*) NEXTCH