Topspeed_JPI/TS-V3/MODBASE/STRCONV.LST

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    1  IMPLEMENTATION MODULE StrConv;
    2  (*
    3   *  REPERTOIRE
    4   *  Release 1.6
    5   *  By Charles Bradford and Cole Brecheen
    6   *  (c) Copyright 1985-1992 PMI
    7   *  Green Bay, Wisconsin
    8   *  All rights reserved
    9   *  (414) 468-6040
   10   *
   11   *  $Header:   D:/logfiles/mods/strconv.mov   1.7   10 Mar 1991 15:33:12   coleb  $
   12   *
   13   *)
   14  
   15  
   16  IMPORT ErrorManager;
   17  IMPORT Key;
   18  IMPORT LowLevel;
   19  IMPORT M2Strings;
   20  IMPORT Numbers;
   21  IMPORT NumTypes;
   22  IMPORT PosUtils;
   23  IMPORT StrEdit;
   24  IMPORT StringIO;
   25  IMPORT SYSTEM;
   26  
   27  VAR
   28    Initialized : BOOLEAN;
   29  
   30    CONST
   31      blank = ' ';
   32  
   33    VAR
   34      ten, zero, one : NumTypes.Real8;
*****                                ^ not supported yet
   35  
   36  
   37    PROCEDURE StrToReal(TheStr : ARRAY OF CHAR; StartingSpot :
*****                                          ^ not supported yet
   38        CARDINAL; VAR TheReal : NumTypes.Real8): BOOLEAN;
*****                                         ^ not supported yet
   39      CONST
   40        ten = 10.0;
   41        one = 1.0;
   42        zero = 0.0;
   43        digitsize = 16;
   44        OrdZero = 48;
   45      VAR
   46        digit : ARRAY [1..digitsize] OF INTEGER;
*****                          ^ not supported yet
*****                                        ^ not supported yet
   47        expstr : ARRAY [0..24] OF CHAR;
*****                           ^ not supported yet
*****                                  ^ not supported yet
   48        temp, WholeNum, r, fac : NumTypes.Real8;
*****                                          ^ not supported yet
   49        scalesign, negative : BOOLEAN;
   50        scale, DigitsRightOfDec, exp : INTEGER;
   51        NumOfBlanks, Zeroes, DecPt, EPos : INTEGER;
   52        lngth, limit, spot, DigitArrayIndex, j : INTEGER;
   53      BEGIN
   54        TheReal := 0.0;
*****        ^ not supported yet
   55        exp := 0;
   56        DigitsRightOfDec := 0;
   57        lngth := M2Strings.Length(TheStr);
*****                 ^ not supported yet
*****                           ^ not supported yet
*****                                  ^ not supported yet
   58        spot := StartingSpot;
   59        negative := FALSE;
   60        WHILE (spot<lngth) AND (TheStr[spot]#'.') AND
*****                                ^ not supported yet
*****                                           ^ not supported yet
   61            ((TheStr[spot]<'0') OR (TheStr[spot]>'9')) DO
*****              ^ not supported yet
*****                         ^ not supported yet
*****                                    ^ not supported yet
*****                                               ^ not supported yet
   62          IF TheStr[spot]='-' THEN
*****             ^ not supported yet
*****                        ^ not supported yet
   63            negative := NOT negative;
   64          ELSIF TheStr[spot]='+' THEN
*****                ^ not supported yet
*****                           ^ not supported yet
   65            negative := FALSE;
   66          END;
   67          INC(spot);
*****          ^ undeclared identifier
*****                  ^ not supported yet
   68        END;
   69        IF (spot>=lngth) THEN
   70          RETURN FALSE;
   71        END;
   72        DigitArrayIndex := 1;
   73        WHILE (spot<lngth) AND (DigitArrayIndex<=digitsize) AND
   74            (('0'<=TheStr[spot]) AND (TheStr[spot]<='9')) DO
*****                   ^ not supported yet
*****                              ^ not supported yet
*****                                      ^ not supported yet
*****                                                 ^ not supported yet
   75          digit[DigitArrayIndex] := INTEGER(ORD(TheStr[spot])-OrdZero);
*****          ^ not supported yet
*****                               ^ not supported yet
*****                                            ^ undeclared identifier
*****                                                ^ not supported yet
*****                                                           ^ not supported yet
*****                                                                     ^ not supported yet
   76          INC(DigitArrayIndex);
*****          ^ undeclared identifier
*****                             ^ not supported yet
   77          INC(spot);
*****          ^ undeclared identifier
*****                  ^ not supported yet
   78        END;
   79  
   80        WholeNum := zero;
*****        ^ not supported yet
   81        FOR j := 1 TO DigitArrayIndex-1 DO
   82          WholeNum := WholeNum*ten + Numbers.IntToR8(digit[j]);
*****          ^ not supported yet
*****                      ^ not supported yet
*****                                     ^ not supported yet
*****                                             ^ not supported yet
*****                                                     ^ not supported yet
*****                                                            ^ not supported yet
   83        END;
   84        IF negative THEN
   85          TheReal := -WholeNum;
*****          ^ not supported yet
*****                      ^ not supported yet
   86        ELSE
   87          TheReal := WholeNum;
*****          ^ not supported yet
*****                     ^ not supported yet
   88        END;
   89  
   90        IF (spot=lngth) OR ((TheStr[spot]#'.') AND (TheStr[spot]#'E')) THEN
*****                             ^ not supported yet
*****                                        ^ not supported yet
*****                                                    ^ not supported yet
*****                                                               ^ not supported yet
   91          (*We're either at the end of the string or at the end of
   92            the part of it that contains a valid real number, and
   93            we've found at least one numeric character, so we
   94            return true. *)
   95          RETURN TRUE;
   96        END;
   97  
   98        IF (TheStr[spot]='.') THEN
*****            ^ not supported yet
*****                       ^ not supported yet
   99          scale := 0;
  100          WholeNum := zero;
*****          ^ not supported yet
  101          INC(spot);
*****          ^ undeclared identifier
*****                  ^ not supported yet
  102          WHILE (spot<lngth)
  103              AND (DigitArrayIndex<=digitsize)
  104              AND PosUtils.IsNumericChar(TheStr[spot]) DO
*****                  ^ not supported yet
*****                           ^ not supported yet
*****                                         ^ not supported yet
*****                                                    ^ not supported yet
  105            temp := Numbers.IntToR8(ORD(TheStr[spot])-OrdZero);
*****            ^ not supported yet
*****                    ^ not supported yet
*****                            ^ not supported yet
*****                                    ^ undeclared identifier
*****                                        ^ not supported yet
*****                                                   ^ not supported yet
*****                                                             ^ not supported yet
  106              (* Every time we find a new digit right of the
  107                 decimal point, we essentially slide the number
  108                 thus far to the left one digit by multiplying
  109                 it by ten, and then we add this new digit as if
  110                 it were going to be the least significant digit
  111                 in the final number.  WholeNum is the temporary
  112                 representation of the fractional part of the
  113                 real number. *)
  114            IF negative THEN
  115              WholeNum := (WholeNum * ten) - temp;
*****              ^ not supported yet
*****                           ^ not supported yet
*****                                             ^ not supported yet
  116            ELSE
  117              WholeNum := (WholeNum * ten) + temp;
*****              ^ not supported yet
*****                           ^ not supported yet
*****                                             ^ not supported yet
  118            END;
  119            INC(scale);
*****            ^ undeclared identifier
*****                     ^ not supported yet
  120            INC(DigitArrayIndex);
*****            ^ undeclared identifier
*****                               ^ not supported yet
  121            INC(DigitsRightOfDec);
*****            ^ undeclared identifier
*****                                ^ not supported yet
  122            INC(spot);
*****            ^ undeclared identifier
*****                    ^ not supported yet
  123          END;
  124          IF WholeNum # zero THEN
*****             ^ not supported yet
  125            r := WholeNum;
*****            ^ not supported yet
*****                 ^ not supported yet
  126              (* We kept track in the variable scale of how many times
  127                 we multiplied the fractional part by ten to make it
  128                 a whole number.  Now we divide by ten that number of
  129                 times to get it back down to what it really is. *)
  130            REPEAT
  131              r := r/ten;
*****              ^ not supported yet
*****                   ^ not supported yet
  132              DEC(scale);
*****              ^ undeclared identifier
*****                       ^ not supported yet
  133            UNTIL scale=0;
  134              (* Now add the fractional part to the whole number part. *)
  135            TheReal := TheReal + r;
*****            ^ not supported yet
*****                       ^ not supported yet
*****                                 ^ not supported yet
  136          ELSE
  137            scale := 0;
  138          END;
  139            (* Now we have to worry about the possibility that the number
  140               is in scientific notation.  Note that spot starts out
  141               sitting on the first non-numeric character after the
  142               fractional part of the number. *)
  143          WHILE (spot<lngth)
  144              AND PosUtils.IsWhiteSpace(TheStr[spot]) DO
*****                  ^ not supported yet
*****                           ^ not supported yet
*****                                        ^ not supported yet
*****                                                   ^ not supported yet
  145            INC(spot);
*****            ^ undeclared identifier
*****                    ^ not supported yet
  146          END;
  147        END;
  148        IF (spot = lngth) THEN
  149          RETURN TRUE;
  150        END;
  151        IF (TheStr[spot] # 'E') THEN
*****            ^ not supported yet
*****                       ^ not supported yet
  152          RETURN TRUE;
  153        END;
  154  
  155        INC(spot);
*****        ^ undeclared identifier
*****                ^ not supported yet
  156        M2Strings.Copy( TheStr, spot, lngth - spot, expstr );
*****        ^ not supported yet
*****                  ^ not supported yet
*****                        ^ not supported yet
*****                                                    ^ not supported yet
  157        IF NOT StrToInteger(expstr, 0, exp) THEN
*****               ^ undeclared identifier
*****                            ^ not supported yet
*****                                          ^ not supported yet
  158          RETURN FALSE;
  159        END;
  160  
  161        scale := DigitsRightOfDec + exp;
  162        IF scale#0 THEN
  163          scalesign := scale<0;
  164          scale := ABS(scale);
*****                   ^ undeclared identifier
*****                            ^ not supported yet
  165          IF scale>307 THEN
  166            RETURN FALSE;
  167          END;
  168          IF TheReal # zero THEN
*****             ^ not supported yet
  169            FOR spot := 0 TO 8 DO
  170              IF CARDINAL(spot) IN BITSET(scale) THEN
*****                              ^ not supported yet
*****                                   ^ undeclared identifier
*****                                               ^ not supported yet
  171                IF scalesign THEN
  172                  TheReal := TheReal / NumTypes.R8TenPowers[spot];
*****                  ^ not supported yet
*****                             ^ not supported yet
*****                                       ^ not supported yet
*****                                                ^ not supported yet
*****                                                                ^ not supported yet
  173                ELSE
  174                  TheReal := TheReal * NumTypes.R8TenPowers[spot];
*****                  ^ not supported yet
*****                             ^ not supported yet
*****                                       ^ not supported yet
*****                                                ^ not supported yet
*****                                                                ^ not supported yet
  175                END;
  176              END;
  177            END;
  178          END;
  179        END;
  180        RETURN TRUE;
  181      END StrToReal;
*****          ^ not supported yet
  182  
  183  
  184    PROCEDURE AppendDecoded(VAR TheStr : ARRAY OF CHAR; TheCodeChar : CHAR;
*****                                                  ^ not supported yet
  185        StrConst : ARRAY OF CHAR);
*****                            ^ not supported yet
  186      VAR
  187        CharNum, spot1, spot2 : CARDINAL;
  188        TmpStr : ARRAY [0..255] OF CHAR;
*****                           ^ not supported yet
*****                                   ^ not supported yet
  189        tmpchar : CHAR;
  190      BEGIN
  191        spot2 := M2Strings.Pos(TheCodeChar,StrConst);
*****                 ^ not supported yet
*****                           ^ not supported yet
*****                                           ^ not supported yet
  192        spot1 := 0;
  193        WHILE spot2<=HIGH(StrConst) DO
*****                     ^ undeclared identifier
*****                          ^ not supported yet
  194          IF spot2>spot1 THEN
  195            M2Strings.Copy(StrConst, spot1, spot2-spot1, TmpStr);
*****            ^ not supported yet
*****                      ^ not supported yet
*****                           ^ not supported yet
*****                                                         ^ not supported yet
  196            StrEdit.Append(TheStr, TmpStr);
*****            ^ not supported yet
*****                    ^ not supported yet
*****                           ^ not supported yet
*****                                   ^ not supported yet
  197            (* Copies everything from the start of StrConst, or from
  198            the end of the last CharCode, into TheStr. *)
  199          END;
  200          IF NOT StrToCardinal(StrConst,spot2+1,CharNum) THEN
*****                 ^ undeclared identifier
*****                               ^ not supported yet
*****                                                       ^ not supported yet
  201            ErrorManager.WARN('Invalid string in AppendDecoded');
*****            ^ not supported yet
*****                         ^ not supported yet
*****                              ^ not supported yet
  202          END;
  203          tmpchar := CHR(CharNum);
*****                     ^ undeclared identifier
*****                                ^ not supported yet
  204          StrEdit.Append(TheStr, tmpchar);
*****          ^ not supported yet
*****                  ^ not supported yet
*****                         ^ not supported yet
*****                                        ^ not supported yet
  205          spot1 := spot2+4;
  206          spot2 := PosUtils.Positn(TheCodeChar,StrConst,spot2+1);
*****                   ^ not supported yet
*****                            ^ not supported yet
*****                                               ^ not supported yet
*****                                                               ^ not supported yet
  207        END;
  208        IF spot1< M2Strings.Length(StrConst) THEN
*****                  ^ not supported yet
*****                            ^ not supported yet
*****                                   ^ not supported yet
  209          M2Strings.Copy(StrConst, spot1, M2Strings.Length(StrConst)-spot1, TmpStr);
*****          ^ not supported yet
*****                    ^ not supported yet
*****                         ^ not supported yet
*****                                          ^ not supported yet
*****                                                    ^ not supported yet
*****                                                           ^ not supported yet
*****                                                                            ^ not supported yet
  210          StrEdit.Append(TheStr, TmpStr);
*****          ^ not supported yet
*****                  ^ not supported yet
*****                         ^ not supported yet
*****                                 ^ not supported yet
  211        END;
  212      END AppendDecoded;
*****          ^ not supported yet
  213  
  214    PROCEDURE CardinalToStr(TheNum : CARDINAL; width : CARDINAL; VAR
  215        TheStr : ARRAY OF CHAR);
*****                          ^ not supported yet
  216      VAR
  217        spot : INTEGER;
  218        tmp : ARRAY [0..80] OF CHAR;
*****                        ^ not supported yet
*****                               ^ not supported yet
  219      BEGIN
  220        LowLevel.Fill(SYSTEM.ADR(TheStr), 1+HIGH(TheStr), blank);
*****        ^ not supported yet
*****                 ^ not supported yet
*****                      ^ not supported yet
*****                             ^ not supported yet
*****                                 ^ not supported yet
*****                                            ^ undeclared identifier
*****                                                 ^ not supported yet
*****                                                               ^ not supported yet
  221        (*Fill TheStr with spaces.*)
  222        spot := HIGH(TheStr);
*****                ^ undeclared identifier
*****                     ^ not supported yet
  223        REPEAT
  224          TheStr[spot] := CHR((TheNum MOD 10)+48);
*****          ^ not supported yet
*****                     ^ not supported yet
*****                          ^ undeclared identifier
*****                                                ^ not supported yet
  225          TheNum := TheNum DIV 10;
  226          DEC(spot);
*****          ^ undeclared identifier
*****                  ^ not supported yet
  227        UNTIL (TheNum<10) OR (spot<=0);
  228        IF TheNum#0 THEN
  229          TheStr[spot] := CHR(TheNum+48);
*****          ^ not supported yet
*****                     ^ not supported yet
*****                          ^ undeclared identifier
*****                                       ^ not supported yet
  230        END;
  231        IF M2Strings.Length(TheStr)>width THEN
*****           ^ not supported yet
*****                     ^ not supported yet
*****                            ^ not supported yet
  232          StrEdit.CutLeadingChars(' ', TheStr);
*****          ^ not supported yet
*****                  ^ not supported yet
*****                                       ^ not supported yet
  233        END;
  234        IF M2Strings.Length(TheStr)<width THEN
*****           ^ not supported yet
*****                     ^ not supported yet
*****                            ^ not supported yet
  235          LowLevel.Fill(SYSTEM.ADR(tmp), 1+HIGH(tmp), blank);
*****          ^ not supported yet
*****                   ^ not supported yet
*****                        ^ not supported yet
*****                               ^ not supported yet
*****                                   ^ not supported yet
*****                                           ^ undeclared identifier
*****                                                ^ not supported yet
*****                                                           ^ not supported yet
  236          StrEdit.SetLength(tmp, width-M2Strings.Length(TheStr));
*****          ^ not supported yet
*****                  ^ not supported yet
*****                            ^ not supported yet
*****                                       ^ not supported yet
*****                                                 ^ not supported yet
*****                                                        ^ not supported yet
  237          StrEdit.Append(tmp, TheStr);
*****          ^ not supported yet
*****                  ^ not supported yet
*****                         ^ not supported yet
*****                              ^ not supported yet
  238          M2Strings.Assign(tmp, TheStr);
*****          ^ not supported yet
*****                    ^ not supported yet
*****                           ^ not supported yet
*****                                ^ not supported yet
  239        END;
  240      END CardinalToStr;
*****          ^ not supported yet
  241  
  242    PROCEDURE IntegerToStr(TheNum : INTEGER; width : CARDINAL; VAR
  243        TheStr : ARRAY OF CHAR);
*****                          ^ not supported yet
  244      VAR
  245        spot : CARDINAL;
  246      BEGIN
  247        CardinalToStr(ABS(TheNum), width, TheStr);
*****        ^ not supported yet
*****                      ^ undeclared identifier
*****                                ^ not supported yet
*****                                          ^ not supported yet
  248        IF TheNum<0 THEN
  249          spot := LowLevel.ScanNE( M2Strings.Length(TheStr), blank,
*****                  ^ not supported yet
*****                           ^ not supported yet
*****                                   ^ not supported yet
*****                                             ^ not supported yet
*****                                                    ^ not supported yet
  250              SYSTEM.ADR(TheStr) );
*****              ^ not supported yet
*****                     ^ not supported yet
*****                         ^ not supported yet
  251            (* find the first nonblank *)
  252          IF spot>0 THEN
  253            (* We do this to preserve the correct width,
  254               if possible. *)
  255            TheStr[spot-1] := '-';
*****            ^ not supported yet
*****                         ^ not supported yet
  256          ELSE
  257            M2Strings.Insert('-', TheStr, spot);
*****            ^ not supported yet
*****                      ^ not supported yet
*****                                  ^ not supported yet
*****                                              ^ not supported yet
  258          END;
  259        END;
  260      END IntegerToStr;
*****          ^ not supported yet
  261  
  262  
  263    TYPE
  264      LongAndShort =
  265        RECORD
  266          CASE : CHAR OF
*****          ^ not supported yet
*****                      ^ 'POINTER' expected
  267            'A' :
  268            longi : LONGINT;
  269          | 'B' :
  270            locard, hicard : CARDINAL;
  271          | 'C' :
  272            loint, hiint : INTEGER;
  273          END;
  274        END;
  275    VAR
  276      TenPowers : ARRAY [0..9] OF LongAndShort;
  277  
  278    PROCEDURE LongIntegerToStr(TheNum : LONGINT; width : CARDINAL;
  279      VAR TheStr : ARRAY OF CHAR);
  280      VAR
  281        LongConv : LongAndShort;
  282        positive : BOOLEAN;
  283        charstr : ARRAY [0..80] OF CHAR;
  284        i : CARDINAL;
  285        tmpchar: CHAR;
  286      BEGIN
  287        LongConv.longi := TheNum;
  288        IF LongConv.hiint < 0 THEN
  289          TheNum := -TheNum;
  290          positive := FALSE;
  291        ELSE
  292          positive := TRUE;
  293        END;
  294        (* Fill(ADR(charstr), 10, '0'); replaced below *)
  295        charstr[10] := 0C;
  296        FOR i := 0 TO 9 DO
  297          tmpchar := '0';
  298          WHILE NOT (TheNum < TenPowers[i].longi) DO
  299            INC( tmpchar);
  300            TheNum := TheNum - TenPowers[i].longi;
  301          END;
  302          charstr[i] := tmpchar;
  303        END;
  304        StrEdit.CutLeadingChars('0', charstr);
  305        IF NOT positive THEN
  306          M2Strings.Insert('-', charstr, 0);
  307        END;
  308        IF charstr[0]=0C THEN
  309          charstr[0] := '0';
  310          charstr[1] := 0C;
  311        END;
  312        M2Strings.Assign(charstr, TheStr);
  313        IF M2Strings.Length(TheStr)<width THEN
  314          LowLevel.Fill(SYSTEM.ADR(charstr), 1+HIGH(charstr), blank);
  315          StrEdit.SetLength(charstr, width-M2Strings.Length(TheStr));
  316          StrEdit.Append(charstr, TheStr);
  317          M2Strings.Assign(charstr, TheStr);
  318        END;
  319      END LongIntegerToStr;
  320  
  321  
  322  (*$O-*)
  323  (*We turn off optimization for this procedure because of a bug in
  324    the beta copy of Logitech's v3.0.*)
  325    PROCEDURE StrToLongInteger(TheStr : ARRAY OF CHAR; StartingSpot :
  326        CARDINAL; VAR TheLong : LONGINT) : BOOLEAN;
  327      VAR
  328        positive : BOOLEAN;
  329        ten : LONGINT;
  330        dumlong : LongAndShort;
  331        charstr : ARRAY [0..10] OF CHAR;
  332        leng : CARDINAL;
  333      BEGIN
  334        leng := M2Strings.Length(TheStr);
  335        TheLong := NumTypes.L0;
  336        ten := Numbers.Lc(10);
  337        positive := TRUE;
  338        WHILE (StartingSpot<leng) AND ((TheStr[StartingSpot]<'0')
  339            OR (TheStr[StartingSpot]>'9')) DO
  340          IF TheStr[StartingSpot]='-' THEN
  341            positive := FALSE;
  342          END;
  343          INC(StartingSpot);
  344        END;
  345        IF (StartingSpot>=leng) THEN
  346          RETURN FALSE;
  347        END;
  348        WHILE (StartingSpot<leng) AND ((TheStr[StartingSpot]>='0'
  349            ) AND (TheStr[StartingSpot]<='9')) DO
  350          TheLong := TheLong * ten;
  351          dumlong.hicard := 0;
  352          dumlong.locard := ORD(TheStr[StartingSpot])-48;
  353          TheLong := TheLong + dumlong.longi;
  354          INC(StartingSpot);
  355        END;
  356        IF NOT positive THEN
  357          TheLong := -TheLong;
  358        END;
  359        RETURN TRUE;
  360      END StrToLongInteger;
  361  (*$O=*)
  362  
  363  
  364    PROCEDURE StrToCardinal(TheStr : ARRAY OF CHAR; StartingSpot :
  365        CARDINAL; VAR TheCard : CARDINAL) : BOOLEAN;
  366      VAR
  367        spot, StrLen : CARDINAL;
  368      BEGIN
  369        spot := StartingSpot;
  370        TheCard := 0;
  371        StrLen := M2Strings.Length(TheStr);
  372        WHILE ((spot<StrLen) AND ((TheStr[spot]<'0'
  373            ) OR (TheStr[spot]>'9'))) DO
  374          INC(spot);
  375        (*Skips all leading non-numeric stuff.*)
  376        END;
  377        IF spot>=StrLen THEN
  378          RETURN FALSE;
  379        END;
  380        WHILE (spot<StrLen) AND (TheStr[spot]>='0'
  381            ) AND (TheStr[spot]<='9') DO
  382          TheCard := TheCard*10;
  383          INC(TheCard, ORD(TheStr[spot])-48);
  384          INC(spot);
  385        END;
  386        RETURN TRUE;
  387      END StrToCardinal;
  388  
  389  
  390    PROCEDURE StrToInteger(TheStr : ARRAY OF CHAR; StartingSpot :
  391        CARDINAL; VAR TheInt : INTEGER) : BOOLEAN;
  392      VAR
  393        spot, StrLen : CARDINAL;
  394        negative : BOOLEAN;
  395      BEGIN
  396        spot := StartingSpot;
  397        TheInt := 0;
  398        StrLen := M2Strings.Length(TheStr);
  399        negative := FALSE;
  400        WHILE ((spot<StrLen) AND ((TheStr[spot]<'0'
  401            ) OR (TheStr[spot]>'9'))) DO
  402          IF TheStr[spot]='-' THEN
  403            negative := NOT negative;
  404              (* Means negative will go back to FALSE if
  405                 there are two leading minus signs; may
  406                 not be good for much, but why not? *)
  407          END;
  408          INC(spot);
  409        (*Skips all leading non-numeric stuff.*)
  410        END;
  411        IF spot>=StrLen THEN
  412          RETURN FALSE;
  413        END;
  414        WHILE (spot<StrLen) AND (TheStr[spot]>='0'
  415            ) AND (TheStr[spot]<='9') DO
  416          TheInt := TheInt*10;
  417          INC(TheInt, ORD(TheStr[spot])-48);
  418          INC(spot);
  419        END;
  420        IF negative THEN
  421          TheInt := -TheInt;
  422        END;
  423        RETURN TRUE;
  424      END StrToInteger;
  425  
  426  
  427    PROCEDURE DateToStr(month, day, year : CARDINAL; VAR TheStr :
  428      ARRAY OF CHAR);
  429      VAR
  430        DayStr, MnthStr, YrStr : ARRAY [0..15] OF CHAR;
  431      BEGIN
  432        CardinalToStr(day, 2, DayStr);
  433        IF DayStr[0]=' ' THEN
  434          DayStr[0] := '0';
  435        END;
  436        CardinalToStr(month, 2, MnthStr);
  437        CardinalToStr(year, 2, YrStr);
  438        IF M2Strings.Length(YrStr)=4 THEN
  439          (*Delete the '19' if it is present.*)
  440          M2Strings.Delete(YrStr, 0, 2);
  441        END;
  442        M2Strings.Assign(MnthStr, TheStr);
  443        StrEdit.Append(TheStr, '-');
  444        StrEdit.Append(TheStr, DayStr);
  445        StrEdit.Append(TheStr, '-');
  446        StrEdit.Append(TheStr, YrStr);
  447      END DateToStr;
  448  
  449  
  450    PROCEDURE TimeToStr(hours, minutes, seconds, hundredths : CARDINAL;
  451      VAR TheStr : ARRAY OF CHAR);
  452      VAR
  453        HundrStr, SecStr, MinStr, HourStr : ARRAY [0..20] OF CHAR;
  454        pm : BOOLEAN;
  455      BEGIN
  456        CardinalToStr(hundredths, 2, HundrStr);
  457        IF HundrStr[0]=' ' THEN
  458          HundrStr[0] := '0';
  459        END;
  460        CardinalToStr(seconds, 2, SecStr);
  461        IF SecStr[0]=' ' THEN
  462          SecStr[0] := '0';
  463        END;
  464        CardinalToStr(minutes, 2, MinStr);
  465        IF MinStr[0]=' ' THEN
  466          MinStr[0] := '0';
  467        END;
  468        pm := hours>=12;
  469          (* 10 July 87:  changed from hours > 12 at suggestion of
  470             H. A. Hofmans to correct problem with the first noon
  471             hour being called am. *)
  472        IF hours>12 THEN
  473          DEC(hours, 12);
  474        END;
  475        CardinalToStr(hours, 2, HourStr);
  476        M2Strings.Assign(HourStr, TheStr);
  477        StrEdit.Append(TheStr, ':');
  478        StrEdit.Append(TheStr, MinStr);
  479        StrEdit.Append(TheStr, ':');
  480        StrEdit.Append(TheStr, SecStr);
  481        StrEdit.Append(TheStr, ':');
  482        StrEdit.Append(TheStr, HundrStr);
  483        IF pm THEN
  484          StrEdit.Append(TheStr, 'p');
  485        ELSE
  486          StrEdit.Append(TheStr, 'a');
  487        END;
  488      END TimeToStr;
  489  
  490  
  491    PROCEDURE RealToStr( TheNum: NumTypes.Real8; DigitsRightOfDec,
  492        width: INTEGER; VAR TheStr: ARRAY OF CHAR);
  493  
  494      CONST
  495        ten = 10.0;
  496        one = 1.0;
  497        zero = 0.0;
  498      VAR
  499        spot : CARDINAL;
  500        i, exp : INTEGER;
  501        expstr : ARRAY [0..6] OF CHAR;
  502        tmpstr : ARRAY [0..31] OF CHAR;
  503  
  504      PROCEDURE PutDigit(VAR r : NumTypes.Real8);
  505        VAR
  506          dig : LONGINT;
  507          d : CARDINAL;
  508          WholePart : NumTypes.Real8;
  509        BEGIN
  510          dig := Numbers.R8ToL(r);
  511          d := Numbers.C(dig);
  512          tmpstr[spot] := CHR(d+ORD('0'));
  513          INC(spot);
  514          WholePart := Numbers.LToR8(dig);
  515          r := r - WholePart;
  516        END PutDigit;
  517  
  518      BEGIN
  519        LowLevel.Fill(SYSTEM.ADR(tmpstr), 1+HIGH(tmpstr), 0C);
  520          (*Fill tmpstr with nulls.*)
  521        spot := 0;
  522        IF TheNum<zero THEN
  523          tmpstr[spot] := '-';
  524          INC(spot);
  525          TheNum := -TheNum;
  526        END;
  527        exp := 0;
  528        IF TheNum#zero THEN
  529          LOOP
  530            IF TheNum<one THEN
  531              TheNum := TheNum*ten;
  532              DEC(exp);
  533            ELSIF TheNum>=ten THEN
  534              TheNum := TheNum/ten;
  535              INC(exp);
  536            ELSE
  537              EXIT;
  538            END;
  539          END;
  540        END;
  541        PutDigit(TheNum);
  542        tmpstr[spot] := '.';
  543        INC(spot);
  544        FOR i := 1 TO 15 DO
  545          TheNum := TheNum*ten;
  546          PutDigit(TheNum);
  547        END;
  548        tmpstr[spot] := 'E';
  549        IntegerToStr(exp, 0, expstr);
  550        StrEdit.Append(tmpstr, expstr);
  551        IF DigitsRightOfDec < 0 THEN
  552          RETURN;
  553        END;
  554        IF NOT ScientificToPlain( tmpstr, DigitsRightOfDec,
  555            width, TheStr ) THEN
  556          ErrorManager.WARN('Invalid real');
  557        END;
  558      END RealToStr;
  559  
  560  
  561    PROCEDURE ReturnedCard( TheStr: ARRAY OF CHAR ):
  562        CARDINAL;
  563      VAR
  564        tmpc: CARDINAL;
  565      BEGIN
  566        IF NOT StrToCardinal( TheStr, 0, tmpc ) THEN
  567          StrEdit.Append( TheStr, ' # number' );
  568          ErrorManager.WARN( TheStr );
  569        END;
  570        RETURN tmpc;
  571      END ReturnedCard;
  572  
  573    PROCEDURE ReturnedInt( TheStr: ARRAY OF CHAR ):
  574        INTEGER;
  575      VAR
  576        tmpi: INTEGER;
  577      BEGIN
  578        IF NOT StrToInteger( TheStr, 0, tmpi ) THEN
  579          StrEdit.Append( TheStr, ' # number' );
  580          ErrorManager.WARN( TheStr );
  581        END;
  582        RETURN tmpi;
  583      END ReturnedInt;
  584  
  585  
  586    PROCEDURE ScientificToPlain(scientific : ARRAY OF CHAR;
  587        DigitsToRight, width : CARDINAL; VAR plain : ARRAY OF CHAR) :
  588        BOOLEAN;
  589      VAR
  590        RoundSpot, lngth, FirstSpot, eSpot, DotSpot,
  591            ProperNumOfDigits : CARDINAL;
  592        cnt, DecimalShift : INTEGER;
  593        tmpstr : ARRAY [0..79] OF CHAR;
  594        carrying : BOOLEAN;
  595        e, dot, space, zero : ARRAY [0..0] OF CHAR;
  596          (* We use these instead of CHAR constants because this
  597             procedure was actually written for the ITC version.
  598             See CharStuf module chapter for explanation. *)
  599      BEGIN
  600        e[0] := 'E';
  601        dot[0] := '.';
  602        space[0] := ' ';
  603        zero[0] := '0';
  604        eSpot := M2Strings.Pos(e,scientific);
  605        IF NOT StrToInteger(scientific, eSpot, DecimalShift) THEN
  606          RETURN FALSE;
  607        END;
  608        M2Strings.Assign(scientific, tmpstr);
  609        M2Strings.Delete(tmpstr, eSpot,
  610            (M2Strings.Length(tmpstr) - eSpot) + 1);
  611        DotSpot := M2Strings.Pos(dot,tmpstr);
  612        IF DotSpot>HIGH(tmpstr) THEN
  613          RETURN FALSE;
  614        ELSE
  615          M2Strings.Delete(tmpstr, DotSpot, 1);
  616        END;
  617        IF tmpstr[0]='-' THEN
  618          FirstSpot := 1;
  619        ELSE
  620          FirstSpot := 0;
  621        END;
  622        IF DecimalShift>=0 THEN
  623          DotSpot := DotSpot + CARDINAL(DecimalShift);
  624        ELSE
  625          DecimalShift := -DecimalShift;
  626          FOR cnt := 1 TO DecimalShift DO
  627            M2Strings.Insert(zero, tmpstr, FirstSpot);
  628          END;
  629          DotSpot := FirstSpot + 1;
  630        END;
  631        ProperNumOfDigits := (DotSpot + DigitsToRight);
  632        lngth := M2Strings.Length(tmpstr) + 1;
  633        IF lngth > ProperNumOfDigits THEN
  634          IF LowLevel.ScanNE( ProperNumOfDigits, '9', SYSTEM.ADR(tmpstr)
  635              ) < INTEGER(ProperNumOfDigits) THEN
  636            (*We can round up without extending length of string.*)
  637            RoundSpot := ProperNumOfDigits;
  638            carrying := FALSE;
  639            WHILE RoundSpot > 0 DO
  640              IF (tmpstr[RoundSpot] >= '5') OR carrying THEN
  641                INC( tmpstr[RoundSpot - 1] );
  642                carrying := FALSE;
  643              END;
  644              DEC(RoundSpot);
  645              IF tmpstr[RoundSpot] = ':' THEN
  646                (*We tried to round up a 9.*)
  647                carrying := TRUE;
  648                tmpstr[RoundSpot] := '0';
  649              ELSIF tmpstr[RoundSpot] = '/' THEN
  650                carrying := TRUE;
  651                  (*We meant to round up the first digit to the
  652                    left of the decimal point, but actually rounded up
  653                    the decimal point itself.  The carrying flag
  654                    will correct it next time through.*)
  655                tmpstr[RoundSpot] := '.';
  656              ELSE
  657                RoundSpot := 0;
  658                  (*Forces us out of the loop.*)
  659              END;
  660            END;
  661          END;
  662          M2Strings.Delete(tmpstr, ProperNumOfDigits, lngth-ProperNumOfDigits);
  663          lngth := ProperNumOfDigits + 1;
  664        ELSE
  665          WHILE (ProperNumOfDigits + 1) > lngth DO
  666            StrEdit.Append(tmpstr, zero);
  667            INC(lngth);
  668          END;
  669        END;
  670        M2Strings.Insert(dot, tmpstr, DotSpot);
  671          (*We postpone insertion of the dot so that we can scan
  672            for non-9's above.*)
  673        WHILE (lngth<width) AND (lngth < (HIGH(tmpstr)+1)) DO
  674          M2Strings.Insert(space, tmpstr, 0);
  675          INC(lngth);
  676        END;
  677        M2Strings.Assign(tmpstr, plain);
  678        RETURN TRUE;
  679      END ScientificToPlain;
  680  
  681  
  682    PROCEDURE OldSetFormToNew( OldFormStr: ARRAY OF CHAR; VAR
  683        NewFormStr: ARRAY OF CHAR );
  684      (* This procedure will be deleted in the next release. *)
  685      VAR
  686        tmpcard, last, cnt: CARDINAL;
  687        tmpstr, tmpstr2: ARRAY [0..79] OF CHAR;
  688  
  689      PROCEDURE GetSymbol( VAR TheSymbol: ARRAY OF CHAR );
  690        VAR
  691          s: ARRAY [0..0] OF CHAR;
  692          InQuote : BOOLEAN;
  693          WhichQuote : CHAR;
  694        BEGIN
  695          TheSymbol[0] := 0C;
  696          IF OldFormStr[cnt] = '.' THEN
  697            StrEdit.Append( TheSymbol, '..' );
  698            INC( cnt );
  699            RETURN;
  700          END;
  701          s[0] := OldFormStr[cnt];
  702          InQuote := FALSE;
  703          WhichQuote := 0C;
  704          REPEAT
  705            IF InQuote OR (NOT PosUtils.Present(s, ';.')) THEN
  706              StrEdit.Append( TheSymbol, s );
  707            END;
  708            IF (s[0] = '"') OR (s[0] = "'") THEN
  709              IF InQuote THEN
  710                IF (WhichQuote = s[0]) THEN
  711                  InQuote := FALSE;
  712                END;
  713              ELSE
  714                InQuote := TRUE;
  715                WhichQuote := s[0];
  716              END
  717            END;
  718            INC( cnt );
  719            IF cnt <= last THEN
  720              s[0] := OldFormStr[cnt];
  721            END;
  722          UNTIL (cnt > last) OR ( (NOT InQuote) AND PosUtils.Present(s,
  723              ';.') );
  724          INC( cnt );
  725          StrEdit.CrunchBlanks( TheSymbol );
  726        END GetSymbol;
  727  
  728      BEGIN
  729        last := M2Strings.Length( OldFormStr );
  730        IF last > 0 THEN
  731          DEC( last );
  732        ELSE
  733          StrEdit.AssignStr( "{0..400}", NewFormStr );
  734          RETURN;
  735        END;
  736        StrEdit.AssignStr( "{", NewFormStr );
  737        cnt := 0;
  738        REPEAT
  739          GetSymbol( tmpstr );
  740          IF CAP(tmpstr[0]) = 'E' THEN
  741            IF NOT StrToCardinal( tmpstr, 1, tmpcard ) THEN
  742              ErrorManager.WARN('Bad set string.');
  743            END;
  744            INC( tmpcard, Key.Extended );
  745            CardinalToStr( tmpcard, 0, tmpstr2 );
  746            StrEdit.Append( NewFormStr, tmpstr2 );
  747          ELSE
  748            (*These should always be numbers or ellipses.*)
  749            IF (tmpstr[0] = '.') THEN
  750              M2Strings.Delete( NewFormStr,
  751                  M2Strings.Length(NewFormStr) - 1, 1 );
  752                (*delete the comma appended in the last loop*)
  753            END;
  754            StrEdit.Append( NewFormStr, tmpstr );
  755          END;
  756          IF (cnt <= last) AND (tmpstr[0] # '.') THEN
  757            StrEdit.Append( NewFormStr, ',' );
  758          END;
  759        UNTIL cnt > last;
  760        StrEdit.Append( NewFormStr, "}" );
  761      END OldSetFormToNew;
  762  
  763  
  764    PROCEDURE Init();
  765      VAR
  766        i : CARDINAL;
  767      BEGIN
  768        IF Initialized THEN
  769          RETURN;
  770        ELSE
  771          Initialized := TRUE;
  772        END;
  773        ErrorManager.Init();
  774        Key.Init();
  775        LowLevel.Init();
  776        M2Strings.Init();
  777        Numbers.Init();
  778        NumTypes.Init();
  779        PosUtils.Init();
  780        StrEdit.Init();
  781  
  782  (*EntryDiag:
  783        StringIO.WriteEol( 1, 'Entering StrConv' );
  784  :EntryDiag*)
  785  
  786        FOR i := 5 TO 9 DO
  787          TenPowers[i].hicard := 0;
  788        END;
  789        TenPowers[9].locard := 1;
  790        TenPowers[8].locard := 10;
  791        TenPowers[7].locard := 100;
  792        TenPowers[6].locard := 1000;
  793        TenPowers[5].locard := 10000;
  794        TenPowers[4].locard := 34464; (*       100,000 *)
  795        TenPowers[3].locard := 16960; (*     1,000,000 *)
  796        TenPowers[2].locard := 38528; (*    10,000,000 *)
  797        TenPowers[1].locard := 57600; (*   100,000,000 *)
  798        TenPowers[0].locard := 51712; (* 1,000,000,000 *)
  799        TenPowers[4].hicard := 1;     (*       100,000 *)
  800        TenPowers[3].hicard := 15;    (*     1,000,000 *)
  801        TenPowers[2].hicard := 152;   (*    10,000,000 *)
  802        TenPowers[1].hicard := 1525;  (*   100,000,000 *)
  803        TenPowers[0].hicard := 15258; (* 1,000,000,000 *)
  804  
  805  (*EntryDiag:
  806        StringIO.WriteEol( 1, 'Exiting StrConv' );
  807  :EntryDiag*)
  808      END Init;
  809  
  810  BEGIN
  811    Initialized := FALSE;
  812    Init();
  813  END StrConv.

  252 errors