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EM5250IO.PAS
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Pascal/Delphi Source File
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1991-12-04
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64KB
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1,685 lines
unit em5250io; {Full Screen Manager and 5250 Emulator Interface Routines}
{$V-}
Interface
Uses dos,crt,printer;
Type
indicatorarray = array[1..100] of char;
cmdarray = array[1..12] of char;
rtnstring = string[80];
formatpointer = ^formatswork;
fpointer = ^screenfields;
fmtnamestring = string[8];
filenamestring = string[12];
formatswork = record {format header information Array record}
wformatname: string[8];{format name}
wscreenrow: integer; {starting row of format}
wscreencol: integer; {starting column of format}
wbkintcolor: integer; {initial background color}
wtxintcolor: integer; {initial text color}
wclrline: integer; {number of lines on screen to clear}
{from first used line of this format}
wputovr: integer; {indicator-rewrite panel without constants}
{and without erasing input only type fields}
weraseinp: integer; {indicator-erase input only type fields on}
{if putovr indicator is on (1)}
whelpname: string[8];{Name of Help Format For This Format}
wcommandkeymask: cmdarray; {Valid Commandkeys This FMT}
nextformat: formatpointer;
firstconstant: fpointer;
firstfield: fpointer;
end;
screenfields = record {field description on heap record}
screenrow: integer; {row starting location of field}
screencol: integer; {column starting location of field}
fieldlen: byte; {Length Of Field Including Decimals If Any}
fill1: byte;
fielddec: byte; {Number Of Decimal Positions In Field}
lowercas: char; {Allow Lower Case If None Blank}
datatype: char; {C=Character or String,N=Integer or Real}
iotype: char; {I=Input Only, O=Output Only, B=Both}
fieldnam: string[8];
fmtname: string[8]; {Name Of This Format(Screen Panel)}
screenname: string[8]; {Name Of File Containing Panel Descriptions}
bkcolor: byte; {Background color}
position: byte;
txcolor: byte; {Text Display Color}
protect: byte;
rvrsimg: byte; {Indicator 01-99 if 1 Colors Are Reversed}
blink: byte; {Field Will Blink If Indicator Is On}
errorind: byte; {Indicator 01-99 if 1 Error Msg. Displayed}
{error message stored in constandata}
fill4: byte;
constantdata: string[80];
nextfield: fpointer;
prvfield: fpointer;
fieldoffset: word;
end;
Const
entercode: byte = $68; {5250 enter key scan code}
systemrequestcode: byte = $7C; {5250 System Request Scan Code}
commandcode: byte = $6F; {5250 CMD key. PC F2 key}
commandkey: char = ' '; {commandkey indicator}
block38: char = ' '; {move fields without field exit if not ' '}
fieldexitcode: byte = $2D; {5250 Field Exit Key PC Enter Key}
_In: indicatorarray =
('0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0',
'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0',
'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0',
'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0',
'0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0','0');
procedure seton(indicatornum:shortint);
procedure setof(indicatornum:shortint);
procedure resetind;
procedure openscreenfile(var firstscreenseg,firstscreenofs:word;
screenfilename:filenamestring);
procedure screenio(usezfmtname: fmtnamestring);
procedure writescreen(usefmtname: fmtnamestring);
procedure readscreen(usefmtname: fmtnamestring);
procedure checkinputinhibit;
procedure read38(idrow,idcol,idlen:shortint);
procedure sendfieldexit(sendendoffield: byte);
procedure sendcommandkey(commandkeyx:char);
procedure write38(idrow,idcol,idlen:shortint);
procedure copyscreen(startrow,startcolumn,endrow,endcolumn:shortint);
procedure check38(startrow,startcol,lengthx:shortint; var rtnformat:rtnstring);
procedure autohotkey(hotkeyrow,hotkeycolumn: shortint; hotkeychar:char);
Implementation
Const
inzscreen: char = ' '; {screen specs read from disk flag}
displayadaptersegment: word = $B000; {color display segment address}
helplevel: shortint= 0; {Depth Of Help Screens Displayed}
bottomlinebackground: shortint= 0;
bottomlineforeground: shortint= 0;
backgroundcolortable: array[1..16] of byte =($00,$10,$20,$30,$40,$50,$60,$70,
$00,$10,$20,$30,$40,$50,$60,$70);
textcolortable: array[1..16] of byte =($00,$01,$02,$03,$04,$05,$06,$07,
$08,$09,$0A,$0B,$0C,$0D,$0E,$0F);
errormsg: array[1..11] of string[64] = {keyboard error messages}
('Attempt To Advance Cursor Off The Screen. Use Tab or Field Exit',
'Cursor Advanced Past Start/End Of Field. Use Tab or Field Exit',
'Unidentified Character Entered. Re-enter.',
'Attempt To Enter Info Past End Of Field. Use Tab or Field Exit',
'Field Requires Numbers Only, Other Characters Not Allowed',
'Field Is Full. Insertion Cannot Be Performed',
'No HELP Screen Is Defined For This Screen',
'Command Key Is Not Valid For This Format',
'Numeric Field Conversion Error',
'Invalid Command Key Pressed. Command Key Is Cancelled',
'Requested Format Was Not Found. Program Aborted. ');
firsthelp: integer=0;
secondhelp: integer=0;
thirdhelp: integer=0;
fourthhelp: integer=0;
fifthhelp: integer=0;
sixthhelp: integer=0;
format1: integer=0;
format2: integer=0;
fieldpointer: fpointer=nil;
currentformat: formatpointer=nil;
charoutbuffer: string[80]=' '; {output data field character buffer}
inpbuffer: string[80]=' '; {input field keyboard buffer}
previousformatname: string[8] =' '; {name of last panel read from disk}
zformatname: string[8] =' '; {format name holding variable}
inputbufferlength: byte = $00; {length of current field as a byte}
charin: char = ' '; {current character from keyboard}
insertmodeflag: char = ' '; {Flag For F3 Press }
inputfieldonlyflag: char = ' '; {Eraseinput Key Screenwrite Control}
kbderrorflag: char = ' '; {keyboard error occurred flag}
keyboardstatuschange: char = ' '; {detect numlock press and save}
searchflag: char = ' ';
charvalue: integer = 0; {ordinal value of field charin }
clrlimit: shortint= 0; {last line to be cleared on panel}
column: shortint= 0; {screen column address}
columncount: shortint= 0; {screen column counter}
currentoffset: word = 0; {memory loc. field start on screen}
cvtresult: integer = 0; {character to number conversion }
{error result checker}
datasegment: word= $0000; {segment address for data segment}
decimalcount: shortint= 0; {working field for no. of decimals}
endrow: shortint= 0; {last row number of field}
endcolumn: shortint= 0; {last column in field}
errornumber: shortint= 0; {index to keyboard error array}
maxfields: integer = 0; {number of data fields in a format}
multiplier: longint = 0; {factor or 10 to remove or insert }
{decimals in screen field}
offset: shortint= 0; {cursor movement offset from }
{current location negative value}
{means move left,positive=right}
row: shortint= 0; {screen field row address}
scolumn: shortint= 0; {screen field column address}
displayadapteroffset: word =$0000; {start of display memory offset}
srow: shortint= 0; {screen field row address}
workindex: integer = 0; {index to array of data fields or}
{constant fields}
{ work areas for input/output conversion routines}
workaddress: word = 0;
workinteger: integer = 0;
workshortint: shortint= 0;
worklongint: longint = 0;
workreal: real = 0.0;
blanktest: string[80]='';{test input or both types for blanks}
cursorrightcode: byte = $73; {5250 Cursor Right Scan Code}
errorresetcode: byte = $7E; {5250 Error Reset Scan Code}
fieldadvancecode: byte = $20; {5250 Field Advance Key PC Tab Key}
fieldminuscode: byte = $4E; {5250 Field Minus Key PC Minus Key}
homecursorcode: byte = $6D; {5250 Home Cursor Scan Code}
em5250segment: word = $0000; {emulator segment address}
screenoffset: word = $0000; {address offset of emulated screen}
ebcdictableoffset: word = $0000; {address offset of start of ebcdic to
ascii translate table}
inpbuffersegment: word = $0000; {segment address of input buffer string}
inpbufferoffset: word = $0000; {offset address of input buffer string}
inputinhibit: word = $013E; {offset to input inhibited indicator byte}
inhibithistory: word = $013F; {offset to inhibit indicator history byte}
inz38flag: char = ' ';{s38 emulator variables established flag}
keyo: word = $0151; {address to send scan codes to}
surx: word = $0164; {Emulator EBCDIC Display Change Indicator}
systemavailable: word = $015B; {address of system available ind. byte}
hotkey: word = $0178; {address of hot-key indicator}
hkcol: word = $017B; {address auto hot-key char.5250 column}
hkrow: word = $017C; {address auto hot-key char 5250 row}
hkchar: word = $017D; {address containing auto hot-key char}
hotkeychar: char = ' '; {character on s38 format forces DOS hot key}
statusmessage: string[70]='';{System Available & Input Inhibit Message}
zerorealtest: real = 0.0; {test input or both types for zero.}
asciitranslatetable: array[1..128] of byte =
($00,$40,$40,$40,$40,$40,$40,$40,$40,$40,$40,$40,$40,
$40,$40,$40,$40,$40,$40,$40,$40,$40,$40,$40,$40,$40,
$40,$40,$40,$40,$40,$40,$40,$4F,$7F,
$7B,$5B,$6C,$50,$7D,$4D,$5D,$5C,$4E,$6B,$60,$4B,$61,
$F0,$F1,$F2,$F3,$F4,$F5,$F6,$F7,$F8,$F9,$7A,$5E,$4C,
$7E,$6E,$6F,$7C,$C1,$C2,$C3,$C4,$C5,$C6,$C7,$C8,$C9,
$D1,$D2,$D3,$D4,$D5,$D6,$D7,$D8,$D9,$E2,$E3,$E4,$E5,
$E6,$E7,$E8,$E9,$4A,$E0,$5A,$5F,$6D,$79,$81,$82,$83,
$84,$85,$86,$87,$88,$89,$91,$92,$93,$94,$95,$96,$97,
$98,$99,$A2,$A3,$A4,$A5,$A6,$A7,$A8,$A9,$C0,$6A,$D0,
$A1,$8F); {ascii to ebcdic translate table}
scancode5250table: array[1..128] of byte =
($00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,
$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,$00,
$00,$00,$00,$00,$00,$00,$0F,$2B,$1B,
$33,$34,$35,$37,$1B,$39,$3A,$38,$3C,$08,$3B,$09,$0A,
$40,$41,$42,$43,$44,$45,$46,$47,$48,$49,$1A,$1A,$0E,
$3C,$0E,$0A,$32,$11,$05,$03,$13,$23,$14,$15,$16,$28,
$17,$18,$19,$07,$06,$29,$28,$21,$24,$12,$25,$27,$04,
$22,$02,$26,$01,$2B,$2C,$2B,$36,$3B,$3E,$11,$05,$03,
$13,$23,$14,$15,$16,$28,$17,$18,$19,$07,$06,$29,$2A,
$21,$24,$12,$25,$27,$04,$22,$02,$26,$01,$1C,$2C,$1C,
$3E,$31); {ascii to 5250 scan code table}
Type
fixstringz = string[80];
screenpointer = ^screenrecord;
screenrecord = record
savescreenarea: array[1..4000] of byte;
prevscreen: screenpointer;
saveindex: fpointer;
savebuffer: string[80];
saveformatcount: formatpointer;
end;
formatrecord = record {field description disk & array record}
screenrow: integer; {row starting location of field}
screencol: integer; {column starting location of field}
fieldlen: byte; {Length Of Field Including Decimals If Any}
fill2: byte;
fielddec: byte; {Number Of Decimal Positions In Field}
lowercas: char; {Allow Lower Case Entry If NonBlank}
datatype: char; {C=Character or String,N=Integer or Real}
iotype: char; {I=Input Only, O=Output Only, B=Both}
fieldnam: string[8];
fmtname: string[8]; {Name Of This Format(Screen Panel)}
screenname: string[8]; {Name Of File Containing Panel Description}
bkcolor: byte; {Background color}
position: byte; {Position Cursor To Field Indicator}
txcolor: byte; {Text Display Color}
protect: byte; {Protect Field From Input Indicator}
rvrsimg: byte; {Indicator 01-99 if 1 Colors Are Reversed}
blink: byte; {Field Will Blink If Indicator Is On}
errorind: byte; {Indicator 01-99 if 1 Error Msg. Displayed}
{error message stored in constandata}
fill4: byte;
constantdata: string[80];
end;
formatheader = record {format header information disk record}
bkintcol: integer; {initial background color}
txintcol: integer; {initial text color}
putovr: integer; {rewrite screen inidicator}
eraseinp: integer; {erase input fields if on & putovr on ind}
hfmtname: string[8]; {name of format}
screenname: string[8]; {name of screen file}
clrline: integer; {number of lines to clear from 1st line}
helpname: string[8]; {Name Of Help Format}
commandkeymask: cmdarray; {Valid Command Keys This Format}
reservedarea: string[32];{Reserved For Future Use}
end;
var
screensaveheap: screenrecord;
const
firsthelpscreen: screenpointer=nil;
lasthelpscreen: screenpointer=nil;
newhelpscreen: screenpointer=nil;
procedure setstatusline(messagecolor,delaytime:integer);
begin
gotoxy(1,25);
textcolor(messagecolor);
textbackground(1);
delay(delaytime);
clreol;
end;
procedure emulatorstatusmessage;
begin
setstatusline(4,0);
write(statusmessage);
setstatusline(15,50);
end;
procedure checkinputinhibit;
begin
statusmessage:='Input Inhibited';
emulatorstatusmessage;
while ((mem[em5250segment:inputinhibit] and 2) = 0) or
((mem[em5250segment:inhibithistory] and 2) =2) do
emulatorstatusmessage;
end;
procedure calculateoffset (rowloc,columnloc: integer);
begin
currentoffset:=((rowloc * 80) - 81) + columnloc;
end;
procedure Savescreen(fieldpointer: fpointer);
begin
getmem(newhelpscreen,(sizeof(screensaveheap)));
if firsthelpscreen=nil then begin
firsthelpscreen:=newhelpscreen;
lasthelpscreen:=nil;
end;
move(mem[displayadaptersegment:displayadapteroffset],
newhelpscreen^.savescreenarea,4000);
newhelpscreen^.prevscreen:=lasthelpscreen;
newhelpscreen^.saveindex:=fieldpointer;
newhelpscreen^.savebuffer:=inpbuffer;
newhelpscreen^.saveformatcount:=currentformat;
lasthelpscreen:=newhelpscreen;
helplevel:=helplevel+1;
end;
procedure Restorescreen(var fieldpointer:fpointer);
var savelast: screenpointer;
begin
helplevel:=helplevel-1;
move(lasthelpscreen^.savescreenarea,
mem[displayadaptersegment:displayadapteroffset],4000);
fieldpointer:=lasthelpscreen^.saveindex;
if lasthelpscreen^.prevscreen=nil then begin
inpbuffer:=lasthelpscreen^.savebuffer;
gotoxy(scolumn,srow);
firsthelpscreen:=nil;
end;
if lasthelpscreen<>nil then begin
savelast:=lasthelpscreen^.prevscreen;
currentformat:=lasthelpscreen^.saveformatcount;
freemem(lasthelpscreen,(sizeof(screensaveheap)));
lasthelpscreen:=savelast;
end;
end;
procedure autohotkey;
var
hotkeyrowbyte,hotkeycolumnbyte: byte;
regs: registers;
begin
checkinputinhibit;
while mem[em5250segment:surx]=$00 do begin end;
delay(400);
checkinputinhibit;
hotkeyrowbyte:=hotkeyrow;
hotkeycolumnbyte:=hotkeycolumn;
mem[em5250segment:hkrow]:=hotkeyrowbyte;
mem[em5250segment:hkcol]:=hotkeycolumnbyte;
mem[em5250segment:hkchar]:=asciitranslatetable[(ord(hotkeychar)+1)];
if (mem[em5250segment:hotkey] and 1)<>1 then
mem[em5250segment:hotkey]:=mem[em5250segment:hotkey] xor $01;
with regs do intr(9,regs);
if (mem[em5250segment:hotkey] and 1)=1 then
mem[em5250segment:hotkey]:=mem[em5250segment:hotkey] xor $01;
mem[em5250segment:hkrow]:=$00;
mem[em5250segment:hkcol]:=$00;
mem[em5250segment:hkchar]:=$00;
end;
procedure sendfieldexit;
begin
if (sendendoffield=entercode) or (sendendoffield=commandcode) then begin
checkinputinhibit;
mem[em5250segment:inputinhibit]:=$00;
mem[em5250segment:inhibithistory]:=$FF;
end;
while mem[em5250segment:keyo]<>$00 do begin end;
mem[em5250segment:keyo]:=sendendoffield;
mem[em5250segment:surx]:=$00; {set screen change ind. to zero to allow}
end; {detection of a change in the emulator screen}
procedure systemrequest;
var dummy: char;
cursorx: shortint;
cursory: shortint;
begin
cursorx:=wherex;
cursory:=wherey;
sound(500);
statusmessage:='System Req./ATTN Pressed--Press ESC To Exit, Any Other Key Continue';
emulatorstatusmessage;
nosound;
while not keypressed do emulatorstatusmessage;
charin:=readkey;
if keypressed then dummy:=readkey;
gotoxy(cursorx,cursory);
if ord(charin)<>$1B then begin
checkinputinhibit;
if charvalue>59 then sendfieldexit($57);
sendfieldexit(systemrequestcode);
autohotkey(0,0,#0);
end;
end;
procedure seton;
begin
_in[indicatornum]:='1';
end;
procedure setof;
begin
_in[indicatornum]:='0';
end;
procedure resetind; {reset all indicators in indicator array}
begin
fillchar(_in[1],100,'0');
end;
procedure errorsound(freq,wait:integer);
begin
sound(freq);
delay(wait);
nosound;
end;
procedure clearbottomline;
begin
gotoxy(1,25);
if (bottomlinebackground=0) and (bottomlineforeground<>4) and
(bottomlineforeground<>12) then bottomlinebackground:=4;
textcolor(bottomlineforeground);
textbackground(bottomlinebackground);
clreol;
end;
procedure keyboarderror(errornumber: integer);
begin
clearbottomline;
write(errormsg[errornumber]);
errorsound(500,600);
gotoxy(scolumn,srow);
kbderrorflag:='1';
end;
procedure fixstring(address:word;fieldlen:integer;siotype,sdatatype,ioflag:char);
var
blankloc: integer; {position of first blank character}
sfieldlen: integer; {defined field length}
workseg: word;
begin
if (ioflag='U') or (ioflag='I') then begin
workaddress:=ofs(inpbuffer);
workseg:=seg(inpbuffer);
end;
case ioflag of
'O': begin
workaddress:=ofs(charoutbuffer);
workseg:=seg(charoutbuffer);
blankloc:=ord(mem[datasegment:address]);
mem[datasegment:address]:=ord(chr(fieldlen));
if blankloc>fieldlen then blankloc:=0;
while blankloc<fieldlen do begin
blankloc:=blankloc+1;
mem[datasegment:address + blankloc]:=$20;
end;
move(mem[datasegment:address],mem[workseg:workaddress],(fieldlen+1));
if (siotype='I') then fillchar(mem[datasegment:(address + 1)],
fieldlen,' ');
end;
'U': begin
inpbuffer:='';
blankloc:=(ord(mem[datasegment:address]))+1;
move(mem[datasegment:address],mem[workseg:workaddress],blankloc);
while length(inpbuffer)<fieldlen do begin
if sdatatype='C' then inpbuffer:=inpbuffer + ' '
else inpbuffer:=' ' + inpbuffer;
end;
move(inpbuffer,mem[datasegment:address],(length(inpbuffer)+1));
end;
'I': begin
if sdatatype='R' then begin
blankloc:=pos(' ',inpbuffer);
sfieldlen:=length(inpbuffer);
if blankloc>1 then begin
inpbuffer:=copy(inpbuffer,1,(blankloc-1));
for blankloc:=blankloc to sfieldlen do inpbuffer:=' ' + inpbuffer;
end;
end;
sfieldlen:=length(inpbuffer)+1;
move(mem[workseg:workaddress],mem[datasegment:address],sfieldlen);
end;
end;
end;
procedure fixreal (address:word;rfieldlen,rfielddec: integer;
riotype,rdatatype,ioflag: char);
var savesign: char;
procedure ofixreal(address:word;orfieldlen,orfielddec: integer;
oriotype,ordatatype,ioflag:char);
var workseg: word;
begin
workaddress:=ofs(workreal);
workseg:=seg(workreal);
move(mem[datasegment:address],mem[workseg:workaddress],6);
if workreal<0 then begin
savesign:='-';
workreal:=abs(workreal);
end
else savesign:=' ';
if ordatatype<>'E' then begin
workreal:=workreal*multiplier;
orfielddec:=0;
end
else orfieldlen:=orfieldlen + 1;
str(workreal:orfieldlen:orfielddec,inpbuffer);
if ordatatype<>'N' then inpbuffer:=inpbuffer + savesign;
if ioflag='O' then begin
charoutbuffer:=inpbuffer;
if (oriotype='I') then begin
workreal:=0;
move(mem[workseg:workaddress],mem[datasegment:address],6);
end;
end;
end;
procedure ifixreal(address:word;irfieldlen,irfielddec: integer;
iriotype,irdatatype,ioflag:char);
var workseg: word;
begin
savesign:=' ';
workaddress:=ofs(workreal);
workseg:=seg(workreal);
if irdatatype='E' then irfieldlen:=irfieldlen + 1;
if irdatatype<>'N' then begin
savesign:=inpbuffer[irfieldlen + 1];
inpbuffer:=copy(inpbuffer,1,irfieldlen);
end;
val(inpbuffer,workreal,cvtresult);
if cvtresult<>0 then keyboarderror(9);
if irdatatype<>'E' then workreal:=workreal/multiplier;
if savesign='-' then workreal:=0-workreal;
move(mem[workseg:workaddress],mem[datasegment:address],6);
if irdatatype<>'N' then inpbuffer:=inpbuffer+savesign;
end;
begin
case ioflag of
'U','O': ofixreal (address,rfieldlen,rfielddec,riotype,rdatatype,ioflag);
'I': ifixreal (address,rfieldlen,rfielddec,riotype,rdatatype,ioflag);
end;
end;
procedure fixinteger (address:word;ifieldlen,ifielddec:
integer; iiotype,idatatype,ioflag: char);
var
savesign: char;
workcounter: longint;
targetsize: shortint;
workseg: word;
workofs: word;
procedure ofixinteger(address:word;oifieldlen,oifielddec:
integer; oiiotype,oidatatype,ioflag:char);
begin
move(mem[datasegment:address],mem[(seg(workinteger)):workofs],targetsize);
case targetsize of
1: worklongint:=workshortint;
2: worklongint:=workinteger;
end;
if worklongint<0 then savesign:='-';
worklongint:=abs(worklongint);
str(worklongint:oifieldlen,inpbuffer);
if oidatatype<>'N' then inpbuffer:=inpbuffer + savesign;
if ioflag='O' then begin
charoutbuffer:=inpbuffer;
if oiiotype='I' then begin
workcounter:=0;
move(workcounter,mem[datasegment:address],targetsize);
end;
end;
end;
procedure ifixinteger(address:word; iifieldlen,iifielddec:
integer; iiiotype,iidatatype,ioflag:char);
begin
if iidatatype<>'N' then begin
savesign:=inpbuffer[iifieldlen + 1];
inpbuffer:=copy(inpbuffer,1,iifieldlen);
end;
val(inpbuffer,worklongint,cvtresult);
if savesign='-' then worklongint:=0-worklongint;
if iidatatype<>'N' then inpbuffer:=inpbuffer + savesign;
if targetsize=4 then move(worklongint,mem[datasegment:address],4)
else begin
workinteger:=worklongint;
move(workinteger,mem[datasegment:address],targetsize);
end;
end;
begin
savesign:=' ';
case ifieldlen of
1..2: begin
targetsize:=1;
workofs:=ofs(workshortint);
end;
3..4: begin
targetsize:=2;
workofs:=ofs(workinteger);
end;
5..9: begin
targetsize:=4;
workofs:=ofs(worklongint);
end;
end;
case ioflag of
'U','O': ofixinteger (address,ifieldlen,ifielddec,iiotype,idatatype,ioflag);
'I': ifixinteger (address,ifieldlen,ifielddec,iiotype,idatatype,ioflag);
end;
end;
Procedure Checknumeric(address: word; iotype,datatype: char; fieldlen,
fielddec: integer; ioflag:char);
begin
if (fieldlen>9) or (fielddec>0)
then fixreal(address,fieldlen,fielddec,iotype,datatype,ioflag)
else fixinteger(address,fieldlen,fielddec,iotype,datatype,ioflag);
end;
Procedure Checkfield(ioflag: char; fieldpointer:fpointer);
Begin
multiplier:=1;
for decimalcount:=1 to fieldpointer^.fielddec do multiplier:=multiplier * 10;
datasegment:=dseg;
case fieldpointer^.datatype of
'C','R': fixstring(fieldpointer^.fieldoffset,fieldpointer^.fieldlen,
fieldpointer^.iotype,fieldpointer^.datatype,ioflag);
else checknumeric(fieldpointer^.fieldoffset,fieldpointer^.iotype,
fieldpointer^.datatype,fieldpointer^.fieldlen,
fieldpointer^.fielddec,ioflag);
end;
end;
procedure positioncursor;
begin
if srow>24 then srow:=1;
if srow<1 then srow:=24;
gotoxy(scolumn,srow);
end;
procedure toggleinsertmode;
begin
clearbottomline;
if insertmodeflag='1' then insertmodeflag:=' '
else begin
gotoxy(30,25);
write('Insert Mode');
Insertmodeflag:='1';
end;
offset:=1;
positioncursor;
end;
procedure checkind(var indicatornumber:byte);
begin
if (indicatornumber<1) or (indicatornumber>99) then indicatornumber:=100;
end;
procedure openscreenfile;
var
keyboardstatus: byte absolute $0040:$0017;
capslockstatus: byte absolute $0040:$0018;
screenfile: file of formatrecord;
zformatcontrl: file of formatheader;
formatheaderwork: formatheader;
firstformat: formatpointer absolute format1;
lastformat: formatpointer;
firstfield: fpointer;
cfield: fpointer;
firstconstant: fpointer;
ccons: fpointer;
lastconstant: fpointer;
lastfield: fpointer;
screenwork: formatrecord;
screenheap: screenfields;
formatheap: formatswork;
segment: integer;
offsetp: integer;
ioerr: integer;
testbyte: byte;
begin
{$I+}
{check and ensure numlock is set}
if (keyboardstatus and $20)=0 then keyboardstatus:=keyboardstatus xor $20;
keyboardstatuschange:=' ';
assign(screenfile,screenfilename);
assign(zformatcontrl,(screenfilename + '.hdr'));
reset(screenfile);
reset(zformatcontrl);
resetind;
firstformat:=nil;
firstfield:=nil;
firstconstant:=nil;
textcolor(1);
textbackground(1);
clrscr;
mem[displayadaptersegment:$0000]:=ord('A');
testbyte:=mem[displayadaptersegment:$0000];
if testbyte=ord('A') then displayadapteroffset:=$0000
else displayadapteroffset:=$8000;
mem[displayadaptersegment:$8000]:=ord('A');
testbyte:=mem[displayadaptersegment:$8000];
if testbyte=ord('A') then displayadapteroffset:=$8000
else displayadapteroffset:=$0000;
textcolor(15);
previousformatname:='';
while not eof(screenfile) do begin
with screenwork do begin
read(screenfile,screenwork);
if displayadapteroffset=$0000 then begin
txcolor:=15;
bkcolor:=1;
end;
if fieldnam='Constant' then getmem(ccons,(sizeof(screenheap)))
else getmem(cfield,(sizeof(screenheap)));
if previousformatname<>fmtname then begin
getmem(currentformat,(sizeof(formatheap)));
if firstformat=nil then firstformat:=currentformat
else lastformat^.nextformat:=currentformat;
with formatheaderwork do begin
read(zformatcontrl,formatheaderwork);
previousformatname:=fmtname;
currentformat^.firstconstant:=nil;
currentformat^.firstfield:=nil;
if displayadapteroffset=$0000 then begin
bkintcol:=1;
txintcol:=15;
end;
currentformat^.wformatname:=fmtname;
currentformat^.wscreenrow:=screenrow;
currentformat^.wscreencol:=screencol;
currentformat^.wbkintcolor:=bkintcol;
currentformat^.wtxintcolor:=txintcol;
currentformat^.wputovr:=putovr;
currentformat^.weraseinp:=eraseinp;
currentformat^.wclrline:=clrline;
currentformat^.wcommandkeymask:=commandkeymask;
currentformat^.whelpname:=helpname;
if (currentformat^.wputovr<1) or (currentformat^.wputovr>99)
then currentformat^.wputovr:=100;
if (currentformat^.weraseinp<1) or (currentformat^.weraseinp>99)
then currentformat^.weraseinp:=100;
if fieldnam='Constant' then begin
currentformat^.firstconstant:=ccons;
firstconstant:=nil;
end
else begin
currentformat^.firstfield:=cfield;
firstfield:=nil;
end;
lastformat:=currentformat;
currentformat^.nextformat:=nil;
end;
end
else begin
if (currentformat^.firstconstant=nil) and (fieldnam='Constant')
then begin
currentformat^.firstconstant:=ccons;
firstconstant:=nil;
end;
if (currentformat^.firstfield=nil) and (fieldnam<>'Constant')
then begin
currentformat^.firstfield:=cfield;
firstfield:=nil;
end;
end;
if fieldnam='Constant' then begin
if firstconstant=nil then begin
firstconstant:=ccons;
lastconstant:=nil;
end
else lastconstant^.nextfield:=ccons;
segment:=seg(ccons^);
offsetp:=ofs(ccons^);
move(screenwork,mem[segment:offsetp],(sizeof(screenwork)));
ccons^.nextfield:=nil;
lastconstant:=ccons;
checkind(ccons^.rvrsimg);
checkind(ccons^.blink);
end
else begin
if firstfield=nil then begin
firstfield:=cfield;
lastfield:=nil;
end
else lastfield^.nextfield:=cfield;
segment:=seg(cfield^);
offsetp:=ofs(cfield^);
move(screenwork,mem[segment:offsetp],(sizeof(screenwork)));
checkind(cfield^.rvrsimg);
checkind(cfield^.errorind);
checkind(cfield^.protect);
checkind(cfield^.position);
checkind(cfield^.blink);
cfield^.nextfield:=nil;
cfield^.prvfield:=lastfield;
lastfield:=cfield;
end;
end;
end;
inzscreen:='1';
firstscreenseg:=seg(firstformat^);
firstscreenofs:=ofs(firstformat^);
close(screenfile);
close(zformatcontrl);
end;
procedure calculatescreenoffset(rowaddress,columnaddress: integer);
begin
currentoffset:=((rowaddress*160) -162) + columnaddress + columnaddress;
end;
procedure defaultcolor(var dbkcolor,dtxcolor:byte; dbkint,dtxint:integer);
begin
if dbkcolor=0 then dbkcolor:=dbkint;
if dtxcolor=0 then dtxcolor:=dtxint;
end;
procedure findformat(firstformat: formatpointer; usefmtname:fmtnamestring);
begin
currentformat:=firstformat;
searchflag:=' ';
repeat
if currentformat^.wformatname=usefmtname then searchflag:='1'
else currentformat:=currentformat^.nextformat;
if currentformat=nil then begin
keyboarderror(11);
halt;
end;
until (searchflag='1') or (currentformat=nil);
bottomlineforeground:=currentformat^.wtxintcolor;
bottomlinebackground:=currentformat^.wbkintcolor;
end;
procedure writescreen;
var
bytecount: integer;
zscreenrow: integer;
inputwork: string[80];
wxformat: string[8];
firstformat: formatpointer absolute format1;
workpointer: fpointer;
procedure screenoutput(dataout: fixstringz;
outputlength,bkcol,txcol,rvrs,blink: byte);
var
setcolor: byte;
outputword: array[1..2] of byte;
paramoffset: word;
paramsegment: word;
savescroffset: word;
begin
savescroffset:=displayadapteroffset + currentoffset;
paramoffset:=ofs(dataout) + 1;
paramsegment:=seg(dataout);
if bkcol>15 then bkcol:=1;
if txcol>15 then txcol:=1;
if rvrs=0 then rvrs:=100;
if (_in[rvrs]<>'1') and (_in[rvrs]<>'0') then _in[rvrs]:='0';
if _in[rvrs]='0' then outputword[2]:=
backgroundcolortable[(bkcol + 1)] + textcolortable[(txcol + 1)]
else outputword[2]:=
backgroundcolortable[txcol + 1] + textcolortable[bkcol + 1];
if _in[blink]='1' then outputword[2]:=outputword[2]+$80;
for paramoffset:=paramoffset to (paramoffset + outputlength - 1) do begin
outputword[1]:=mem[paramsegment:paramoffset];
move(outputword,mem[displayadaptersegment:savescroffset],2);
savescroffset:=savescroffset + 2;
end;
end;
begin
commandkey:=' ';
searchflag:=' ';
if currentformat^.wformatname<>usefmtname then
findformat(firstformat,usefmtname);
if (currentformat^.wbkintcolor=0) and (currentformat^.wtxintcolor=0) then
currentformat^.wtxintcolor:=15;
if (_in[currentformat^.wputovr]='0') and (inputfieldonlyflag<>'1') then begin
textcolor(currentformat^.wtxintcolor);
textbackground(currentformat^.wbkintcolor);
if currentformat^.wclrline=0 then clrscr
else begin
clrlimit:=currentformat^.wscreenrow + currentformat^.wclrline;
if clrlimit>25 then clrlimit:=25;
for zscreenrow:=currentformat^.wscreenrow to clrlimit do begin
gotoxy(1,zscreenrow);
clreol;
end;
end;
fieldpointer:=currentformat^.firstconstant;
while fieldpointer<>nil do begin
calculatescreenoffset(fieldpointer^.screenrow,fieldpointer^.screencol);
defaultcolor(fieldpointer^.bkcolor,fieldpointer^.txcolor,
currentformat^.wbkintcolor,currentformat^.wtxintcolor);
screenoutput(fieldpointer^.constantdata,fieldpointer^.fieldlen,
fieldpointer^.bkcolor,fieldpointer^.txcolor,fieldpointer^.rvrsimg,
fieldpointer^.blink);
fieldpointer:=fieldpointer^.nextfield;
end;
end;
fieldpointer:=currentformat^.firstfield;
if fieldpointer<>nil then begin
repeat
calculatescreenoffset(fieldpointer^.screenrow,fieldpointer^.screencol);
defaultcolor(fieldpointer^.bkcolor,fieldpointer^.txcolor,
currentformat^.wbkintcolor,currentformat^.wtxintcolor);
if ((fieldpointer^.iotype='I') and (_in[currentformat^.wputovr]='0')) or
((fieldpointer^.iotype='I') and (_in[currentformat^.wputovr]='1') and
(_in[currentformat^.weraseinp]='1')) then begin
inpbuffer:='';
fillchar(inpbuffer,(fieldpointer^.fieldlen+1),'.');
inpbuffer[0]:=chr(fieldpointer^.fieldlen);
screenoutput(inpbuffer,fieldpointer^.fieldlen,fieldpointer^.bkcolor,
fieldpointer^.txcolor,fieldpointer^.rvrsimg,fieldpointer^.blink);
if (fieldpointer^.datatype='C') or (fieldpointer^.datatype='R') then
fillchar(inpbuffer,(fieldpointer^.fieldlen + 1),' ')
else fillchar(inpbuffer,(fieldpointer^.fieldlen + 1),'0');
inpbuffer[0]:=chr(fieldpointer^.fieldlen);
end;
if (fieldpointer^.iotype='I') and (_in[currentformat^.wputovr]='1') and
(_in[currentformat^.weraseinp]='0') then begin
fieldpointer^.iotype:='B';
checkfield('O',fieldpointer);
fieldpointer^.iotype:='I';
end
else checkfield('O',fieldpointer);
if (fieldpointer^.iotype<>'I') or ((fieldpointer^.iotype='I') and
(_in[currentformat^.wputovr]='1') and
(_in[currentformat^.weraseinp]='0')) then begin
if (fieldpointer^.datatype = 'S') or (fieldpointer^.datatype = 'E')
then fieldpointer^.fieldlen:=fieldpointer^.fieldlen + 1;
if (fieldpointer^.datatype='E') and (fieldpointer^.fielddec>0) then
fieldpointer^.fieldlen:=fieldpointer^.fieldlen+1;
repeat
if length(charoutbuffer)<fieldpointer^.fieldlen then
charoutbuffer:=charoutbuffer + ' ';
until length(charoutbuffer)>=fieldpointer^.fieldlen;
screenoutput(charoutbuffer,fieldpointer^.fieldlen,
fieldpointer^.bkcolor,fieldpointer^.txcolor,fieldpointer^.rvrsimg,
fieldpointer^.blink);
if (fieldpointer^.datatype = 'S') or (fieldpointer^.datatype = 'E')
then fieldpointer^.fieldlen:=fieldpointer^.fieldlen-1;
if (fieldpointer^.datatype='E') and (fieldpointer^.fielddec>0)
then fieldpointer^.fieldlen:=fieldpointer^.fieldlen-1;
end;
if _in[fieldpointer^.errorind]='1' then begin
calculatescreenoffset(25,2);
screenoutput(fieldpointer^.constantdata,
(length(fieldpointer^.constantdata)),fieldpointer^.bkcolor,
fieldpointer^.txcolor,fieldpointer^.rvrsimg,fieldpointer^.blink);
errorsound(450,350);
end;
fieldpointer:=fieldpointer^.nextfield;
zformatname:=fieldpointer^.fmtname;
until (currentformat^.wformatname<>zformatname) or (fieldpointer=nil);
end;
end;
procedure Help(var fieldpointer:fpointer); {Help Format Display Routine}
var
helpnamez: fmtnamestring;
counter: integer;
firstformat: formatpointer absolute format1;
procedure writehelplevel;
begin
if helplevel<>0 then begin
clearbottomline;
write('Help Level --> ',helplevel:2,' -- Press Any Key To Continue');
while not keypressed do begin end;
charin:=readkey;
if (charin=#0) and (keypressed) then begin
charin:=readkey;
if ord(charin)=64 then begin
if helpnamez<>' ' then
findformat(firstformat,helpnamez);
help(fieldpointer);
end;
end;
end;
end;
begin {Main Line Of HELP Procedure}
bottomlinebackground:=currentformat^.wbkintcolor;
bottomlineforeground:=currentformat^.wtxintcolor;
helpnamez:=currentformat^.whelpname;
if helpnamez<>' ' then begin
counter:=pos(' ',helpnamez);
helpnamez[0]:=chr(counter-1);
savescreen(fieldpointer);
writescreen(helpnamez);
writehelplevel;
restorescreen(fieldpointer);
writehelplevel;
end
else begin
keyboarderror(7);
if helplevel>0 then writehelplevel;
end;
end;
procedure setinputcolor(bkcol,txcol,datalength: byte; datatype:char;
blink:byte);
var
setcolor: byte;
colorindex: integer;
savscroffset: word;
begin
savscroffset:=displayadapteroffset+currentoffset;
setcolor:=backgroundcolortable[txcol + 1] + textcolortable[bkcol + 1];
if _in[blink]='1' then setcolor:=setcolor+$80;
if datatype='E' then datalength:=datalength+1;
for colorindex:=1 to datalength do begin
savscroffset:=savscroffset + 2;
mem[displayadaptersegment:savscroffset-1]:=setcolor;
end;
end;
procedure readscreen;
label fieldloop;
var
firstformat: formatpointer absolute format1;
procedure checktab;
var
workpointer: fpointer;
begin
if charvalue=15 then begin
workpointer:=fieldpointer^.prvfield;
if workpointer=nil then begin
workpointer:=fieldpointer^.nextfield;
repeat
if workpointer<>nil then begin
fieldpointer:=workpointer;
workpointer:=workpointer^.nextfield;
end;
until workpointer=nil;
fieldpointer:=fieldpointer^.prvfield;
end
else fieldpointer:=workpointer^.prvfield;
end;
if (charvalue=9) and (fieldpointer^.nextfield=nil) then fieldpointer:=nil;
end;
procedure endoffield;
begin
if insertmodeflag='1' then toggleinsertmode;
if (fieldpointer^.datatype='E') and (fieldpointer^.fielddec>0)
then fieldpointer^.fieldlen:=fieldpointer^.fieldlen + 1;
if (columncount=1) and (charvalue=13) then begin
if (fieldpointer^.datatype='C') or (fieldpointer^.datatype='R')
then charin:=' '
else charin:='0';
inpbuffer:='';
fillchar(inpbuffer,(fieldpointer^.fieldlen+1),charin);
inputbufferlength:=fieldpointer^.fieldlen;
inpbuffer[0]:=chr(inputbufferlength);
end;
if ((columncount>1) and (charvalue=13)) or
((columncount>1) and (charvalue<>13) and
(fieldpointer^.datatype<>'C')) then begin
columncount:=columncount-1;
inpbuffer:=copy(inpbuffer,1,columncount);
repeat
if columncount<fieldpointer^.fieldlen then begin
columncount:=columncount+1;
if fieldpointer^.datatype='C' then inpbuffer:=inpbuffer+' '
else begin
if fieldpointer^.datatype<>'R' then inpbuffer:='0'+inpbuffer
else inpbuffer:=' ' + inpbuffer;
end;
end;
until columncount>=fieldpointer^.fieldlen;
if (fieldpointer^.datatype = 'S') or (fieldpointer^.datatype = 'E')
then begin
if ord(charin) = 45 then inpbuffer:=inpbuffer + '-'
else inpbuffer:=inpbuffer + ' ';
end;
end;
if (columncount=1) and (fieldpointer^.datatype<>'C') and (charvalue<>13)
and (fieldpointer^.datatype<>'R') then begin
columncount:=0;
repeat
columncount:=columncount+1;
if inpbuffer[columncount]=' ' then inpbuffer[columncount]:='0';
until columncount=fieldpointer^.fieldlen;
end;
if (fieldpointer^.datatype='E') and (fieldpointer^.fielddec>0)
then fieldpointer^.fieldlen:=fieldpointer^.fieldlen-1;
checkfield('I',fieldpointer);
gotoxy(fieldpointer^.screencol,fieldpointer^.screenrow);
textcolor(fieldpointer^.txcolor);
textbackground(fieldpointer^.bkcolor);
columncount:=0;
if (fieldpointer^.datatype<>'C') and
((fieldpointer^.fielddec +1)<fieldpointer^.fieldlen) then begin
repeat
columncount:=columncount+1;
if inpbuffer[columncount]='0' then inpbuffer[columncount]:=' ';
until (inpbuffer[columncount]>'0') or
(columncount=fieldpointer^.fieldlen-(fieldpointer^.fielddec+1));
end;
if (fieldpointer^.datatype = 'S') or (fieldpointer^.datatype = 'E')
then fieldpointer^.fieldlen:=fieldpointer^.fieldlen + 1;
if fieldpointer^.datatype = 'E' then
fieldpointer^.fieldlen:=fieldpointer^.fieldlen + 1;
write(copy(inpbuffer,1,fieldpointer^.fieldlen));
if (fieldpointer^.datatype = 'S') or (fieldpointer^.datatype = 'E')
then fieldpointer^.fieldlen:=fieldpointer^.fieldlen-1;
if fieldpointer^.datatype = 'E' then
fieldpointer^.fieldlen:=fieldpointer^.fieldlen - 1;
case charvalue of
09: checktab;
15: checktab;
end;
end;
procedure endofline;
begin
scolumn:=1;
srow:=srow+1;
if srow>24 then begin
srow:=24;
scolumn:=80;
keyboarderror(1);
end;
end;
procedure checkrow;
begin
if scolumn>80 then begin
scolumn:=1;
srow:=srow+1;
end
else begin
if scolumn<1 then begin
scolumn:=80;
srow:=srow-1;
end;
end;
end;
procedure cursorerror;
begin
keyboarderror(2);
scolumn:=scolumn-offset;
checkrow;
gotoxy(scolumn,srow);
end;
procedure columnadvance;
begin
scolumn:=scolumn+offset;
checkrow;
if ((scolumn<fieldpointer^.screencol) and (srow=fieldpointer^.screenrow))
or ((scolumn>endcolumn) and (srow=endrow)) then cursorerror
else begin
if (fieldpointer^.datatype<>'C') and (fieldpointer^.datatype<>'R') and
(inpbuffer[columncount]=' ') then inpbuffer[columncount]:='0';
columncount:=columncount+offset;
end;
positioncursor;
end;
procedure movecursor;
begin
if (charvalue=75) or (charvalue=8) or (charvalue=67)
or (charvalue=92) then offset:=-1;
if (charvalue=77) or (charvalue=68) or (charvalue=93) then offset:=1;
columnadvance;
if (charvalue=92) or (charvalue=93) then columnadvance;
end;
procedure enterscreen; {if capslock or commandkey is pressed end screen}
begin
charvalue:=09;
endoffield;
if fieldpointer=nil then fieldpointer:=currentformat^.firstfield;
repeat
if (fieldpointer<>nil) and (fieldpointer^.nextfield<>nil) then
fieldpointer:=fieldpointer^.nextfield;
until fieldpointer^.nextfield=nil;
end;
procedure commandkeyproc;
var cmdindex: integer;
begin
{ F2--simulated 5250 command key pressed read subsequent command value}
while not keypressed do begin end;
commandkey:=readkey;
{Check For Valid Command Key. Numbers 1-0 and - and =}
if ((commandkey >= '0') and (commandkey <= '9'))
or (commandkey = '-') or
(commandkey = '=') or (ord(commandkey) = 27) then begin
{Check if escape pressed if yes then ignore command. Esc is CMD reset }
if ord(commandkey)<>27 then begin
{setup as though last field had been keyed.}
cmdindex:=0;
{Check For Valid Commandkey For This Format}
repeat
cmdindex:=cmdindex + 1;
until (commandkey=currentformat^.wcommandkeymask[cmdindex]) or
(cmdindex=13);
if cmdindex=13 then begin
keyboarderror(8);
commandkey:=' ';
end
else enterscreen;
end
else begin
commandkey:=' ';
columnadvance;
end;
end
else begin
commandkey:=' ';
keyboarderror(10);
offset:=0;
columnadvance;
end;
end;
procedure Home; {Set Cursor And counters To 1st Field On Screen}
begin
charvalue:=09;
if inputfieldonlyflag<>'1' then endoffield;
fieldpointer:=nil;
columncount:=1;
end;
procedure Eraseinput; {Set Input Field Rewrite Flag & Call Writescreen}
begin
inputfieldonlyflag:='1';
charvalue:=09;
endoffield;
writescreen(currentformat^.wformatname);
Home;
end;
procedure Printscreen;
var
bytecount: shortint;
linecount: shortint;
memloc: word;
begin
memloc:=displayadapteroffset;
for linecount:=1 to 25 do begin
for bytecount:=1 to 80 do begin
write(lst,(chr(mem[displayadaptersegment:memloc])));
memloc:=memloc + 2;
end;
write(lst,(chr(13)),(chr(10)));
end;
write(lst,(chr(12)));
end;
procedure InsertDeleteWrite;
begin
gotoxy(scolumn,srow);
textcolor(fieldpointer^.bkcolor);
textbackground(fieldpointer^.txcolor);
write((copy(inpbuffer,columncount,
(fieldpointer^.fieldlen+1-columncount))));
gotoxy(scolumn,srow);
end;
procedure Deletechar;
begin
delete(inpbuffer,columncount,1);
inpbuffer:=inpbuffer + ' ';
insertdeletewrite;
end;
procedure Insertchar;
var charwork: string[1];
begin
if inpbuffer[fieldpointer^.fieldlen]<>' ' then keyboarderror(6)
else begin
charwork:=charin;
inpbuffer:=copy(inpbuffer,1,(fieldpointer^.fieldlen-1));
insert(charwork,inpbuffer,columncount);
insertdeletewrite;
offset:=1;
columnadvance;
end;
end;
procedure Escape;
var
validfunction: char;
{ Check Characters Following Escape Character And Select An Action}
begin
if (charvalue=27) or (charvalue=$00) then begin
charin:=readkey;
charvalue:=ord(charin);
end;
validfunction:=' ';
case charvalue of
15: endoffield;
67,68: movecursor; {cursor left on F9 cursor right on F10}
60: commandkeyproc; {command key request on F2}
61: toggleinsertmode; {F3 Set Insert Mode}
62: Home; {F4 ReSet Cursor}
63: Printscreen; {F5 Print The Screen}
64: Help(fieldpointer);{F6 Execute Help Routine}
85: Commandkeyproc; {Shift and F2 same as F2}
86: Deletechar; {Shift F3 Delete Character At Cursor}
87: Eraseinput; {Shift F4 Rewrite Screen Input Fields}
92,93: movecursor; {double speed cursor on shift F9/F10}
59,84: systemrequest; {system request valid for emulator interface only}
end;
end;
procedure managekeyboardstatus; {check and/or set keyboard status byte}
var
keyboardstatus: byte absolute $0040:$0017;
capslockstatus: byte absolute $0040:$0018;
begin
{check for Alt key pressed and reset insertmode}
if (keyboardstatus and $08)<>0 then begin
if insertmodeflag='1' then toggleinsertmode;
keyboardstatus:=keyboardstatus xor $08;
end;
{check for capslock and end screen and reset caps state if pressed}
if (capslockstatus and $40)<>0 then begin
enterscreen;
keyboardstatus:=keyboardstatus xor $40;
end;
{check if numlock pressed. if yes treat as field back (back tab)}
if (capslockstatus and $20)<> 0 then begin
charvalue:=15;
keyboardstatuschange:='1';
capslockstatus:=capslockstatus xor $20;
end;
{check control key if pressed toggle caps lock state and reset ctrl}
if ((keyboardstatus and $04)<>0) then
keyboardstatus:=keyboardstatus xor $44;
{check and ensure numlock is set}
if (keyboardstatus and $20)=0 then keyboardstatus:=keyboardstatus xor $20;
end;
procedure checkforpositioncursor;
begin
fieldpointer:=currentformat^.firstfield;
while (fieldpointer<>nil) and (_in[fieldpointer^.position]<>'1') do
fieldpointer:=fieldpointer^.nextfield;
if (fieldpointer<>nil) and (_in[fieldpointer^.position]='1') then
fieldpointer:=fieldpointer^.prvfield;
end;
begin { Main Line Of Read Screen Procedure }
if currentformat^.wformatname<>usefmtname then
findformat(firstformat,usefmtname);
fieldpointer:=nil;
checkforpositioncursor;
fieldloop: inputfieldonlyflag:=' ';
if fieldpointer<>nil then fieldpointer:=fieldpointer^.nextfield
else fieldpointer:=currentformat^.firstfield;
if fieldpointer<>nil then begin
if (fieldpointer^.iotype='O') or (_in[fieldpointer^.protect]='1')
then begin
if (charvalue=15) or (charvalue=09) then checktab;
goto fieldloop;
end;
charvalue:=0;
srow:=fieldpointer^.screenrow;
scolumn:=fieldpointer^.screencol;
endrow:=fieldpointer^.screenrow;
endcolumn:=scolumn+fieldpointer^.fieldlen;
if (fieldpointer^.datatype='E') and (fieldpointer^.fielddec>0)
then endcolumn:=endcolumn + 1;
if endcolumn>80 then begin
endcolumn:=endcolumn-80;
endrow:=endrow+1;
end;
columncount:=1;
checkfield('U',fieldpointer);
calculatescreenoffset(fieldpointer^.screenrow,fieldpointer^.screencol);
setinputcolor(fieldpointer^.bkcolor,fieldpointer^.txcolor,
fieldpointer^.fieldlen,fieldpointer^.datatype,fieldpointer^.blink);
gotoxy(fieldpointer^.screencol,fieldpointer^.screenrow);
repeat
_in[100]:='0';
managekeyboardstatus;
if (keypressed) or (keyboardstatuschange='1') then begin
if kbderrorflag='1' then begin {reset default colors after}
textcolor(currentformat^.wtxintcolor);
{writing error message and }
textbackground(currentformat^.wbkintcolor);
{clear error message text}
clearbottomline;
kbderrorflag:=' ';
end;
textcolor(fieldpointer^.txcolor);
textbackground(fieldpointer^.bkcolor);
if keypressed then begin
charin:=readkey;
charvalue:=ord(charin);
if fieldpointer^.lowercas<>'Y' then charin:=upcase(charin);
end;
keyboardstatuschange:=' ';
case charvalue of
0,27: escape;
08: movecursor; {cursor left}
09,13,15: endoffield; {horizontal tab,return,tabback/numlock}
else
if ((fieldpointer^.datatype<>'C') and (charvalue=43)) or
((fieldpointer^.datatype<>'C') and
(fieldpointer^.datatype<>'N') and (charvalue = 45))
then begin
charvalue:=13;
endoffield;
end
else begin
gotoxy(scolumn,srow);
if (scolumn=endcolumn) and (srow>=endrow) then begin
keyboarderror(4);
setinputcolor(fieldpointer^.bkcolor,fieldpointer^.txcolor,
1,fieldpointer^.datatype,100);
write(' ');
gotoxy(scolumn,srow);
end
else begin
if ((fieldpointer^.datatype<>'C') and
(fieldpointer^.datatype<>'R')) and ((charin<'0') or
(charin>'9')) then begin
if (fieldpointer^.datatype='N') or
(fieldpointer^.datatype='S') then _In[100]:='1';
if (fieldpointer^.datatype='E') and (charin<>'.') then
_In[100]:='1';
end;
if _in[100]='1' then keyboarderror(5)
else begin
if insertmodeflag='1' then insertchar
else begin
write(charin);
inpbuffer[columncount]:=charin;
offset:=1;
columnadvance;
end;
end;
end;
end;
end;
end; {end of if key pressed}
until (charvalue=13) or (charvalue=09) or (charvalue=15);
charin:=' ';
goto fieldloop;
end;
end; {end of fields to be processed}
procedure screenio;
begin
writescreen(usezfmtname);
firsthelpscreen:=nil;
readscreen(usezfmtname);
end;
procedure initialize38;
begin
if inzscreen<>'1' then begin
statusmessage:='Screen File Not Opened. Job Aborted';
emulatorstatusmessage;
halt
end;
end;
procedure copyfield (bytecount,nofield: integer; fieldpointer:fpointer);
var
index: integer;
inpworkoffset: integer;
numericinput: char;
begin
numericinput:=' ';
if nofield=1 then begin
if fieldpointer^.datatype='E' then begin
bytecount:=bytecount + 2;
numericinput:='Y';
end;
if fieldpointer^.datatype='S' then begin
bytecount:=bytecount + 1;
numericinput:='Y';
end;
if fieldpointer^.datatype='N' then numericinput:='Y';
end;
inpworkoffset:=inpbufferoffset;
currentoffset:=(currentoffset + screenoffset) - 1;
for index:=1 to bytecount do begin
mem[inpbuffersegment:inpworkoffset]:=
mem[em5250segment:(ebcdictableoffset + mem[em5250segment:currentoffset +
index])];
if mem[inpbuffersegment:inpworkoffset]=$FF then
mem[inpbuffersegment:inpworkoffset]:=$20;
if (numericinput='Y') and (mem[inpbuffersegment:inpworkoffset]=$20) then
mem[inpbuffersegment:inpworkoffset]:=$30;
inpworkoffset:=inpworkoffset + 1;
end;
currentoffset:=(currentoffset - screenoffset) + 1;
inpbuffer[0]:=chr(bytecount);
end;
procedure select38format (selectrow,selectcolumn,idlen: shortint);
var
blanks: string[8];
firstformat: formatpointer absolute format1;
errorcount: integer;
dummyptr: fpointer;
begin
blanks:=' ';
blanks[0]:=chr(idlen);
if inz38flag<>'1' then initialize38; {initialize emulator card variables}
checkinputinhibit; {check emulator input inhibited ind.}
calculateoffset(selectrow,selectcolumn); {calculate offset to screen id.}
copyfield(idlen,0,dummyptr); {copy in emulator screen id }
findformat(firstformat,(copy(inpbuffer,1,idlen)));
if (currentformat=nil) or (copy(inpbuffer,1,idlen)=blanks) then begin
statusmessage:='PC To S/38 I/O Error - No Format Match';
for errorcount:=1 to 25 do emulatorstatusmessage;
halt;
end;
end;
procedure setio (setioflag: char; fieldpointer: fpointer);
begin
calculateoffset(fieldpointer^.screenrow,fieldpointer^.screencol);
if setioflag='I' then copyfield(fieldpointer^.fieldlen,1,fieldpointer);
checkfield(setioflag,fieldpointer);
end;
procedure read38;
{determine s38 format id, retrieve format & read variables}
var
firstformat: formatpointer absolute format1;
begin
currentformat:=firstformat;
select38format(idrow,idcol,idlen); {locate PC format}
fieldpointer:=currentformat^.firstfield;
repeat
if fieldpointer^.iotype<>'I' then setio('I',fieldpointer);
fieldpointer:=fieldpointer^.nextfield;
until fieldpointer=nil;
end;
procedure sendcommandkey;
var
saveinteger,index: integer;
savebyte: byte;
begin
sendfieldexit(commandcode);
case commandkeyx of
'0': saveinteger:=10;
'-': saveinteger:=11;
'=': saveinteger:=12;
else val(commandkeyx,saveinteger,index);
end;
savebyte:=saveinteger + $30;
sendfieldexit(savebyte);
end;
procedure write38;
{write variables to emulator screen buffer and send the enter scan code}
var
savebyte: byte;
saveinteger: integer;
signsave: char;
index: integer;
teststring: string[10];
datatype: char;
begin
select38format (idrow,idcol,idlen);
fieldpointer:=currentformat^.firstfield;
sendfieldexit(fieldadvancecode); {miss position 5250 cursor so}
sendfieldexit(cursorrightcode); {that home key will work }
sendfieldexit(homecursorcode); {ensure 5250 cursor is in 1st Field}
repeat
if fieldpointer^.iotype<>'O' then begin
datatype:=fieldpointer^.datatype;
setio ('U',fieldpointer);
signsave:=' ';
if (datatype='N') or (datatype='S') or (datatype='E') then begin
if (datatype<>'N') then begin
if inpbuffer[(length(inpbuffer))]='-' then begin
signsave:='-';
inpbuffer:=copy(inpbuffer,1,(length(inpbuffer)-1));
end;
end;
for index:=1 to (length(inpbuffer)) do
if inpbuffer[index]=' ' then inpbuffer[index]:='0';
if (datatype='N') and (fieldpointer^.fielddec>0) then begin
saveinteger:=fieldpointer^.fieldlen-fieldpointer^.fielddec;
teststring:=copy(inpbuffer,(saveinteger + 1),fieldpointer^.fielddec);
inpbuffer:=(copy(inpbuffer,1,(saveinteger))) + '.';
inpbuffer:=inpbuffer + teststring;
end;
end;
calculateoffset(fieldpointer^.screenrow,fieldpointer^.screencol);
for index:=1 to length(inpbuffer) do begin
savebyte:=ord(inpbuffer[index]) + 1;
if signsave<>'-' then begin
mem[em5250segment:(screenoffset + currentoffset)]:=
asciitranslatetable[savebyte];
currentoffset:=currentoffset + 1;
end
else sendfieldexit(scancode5250table[savebyte]);
end;
if block38=' ' then begin
if signsave<>'-' then sendfieldexit(fieldadvancecode)
else sendfieldexit(fieldminuscode);
end;
end;
fieldpointer:=fieldpointer^.nextfield;
until fieldpointer=nil;
while mem[em5250segment:keyo]<>$00 do begin end; {wait for keyboard available}
if commandkey=' ' then sendfieldexit(entercode)
else sendcommandkey(commandkey);
end;
procedure copyscreen;
{copies emulated 5250 screen buffer character for character from
the starting row/column through and including the ending row column
attribute bytes in the emulated screen are checked for and dropped}
var
endaddress: word;
bufferindex: integer;
bytecount: integer;
dummyptr: fpointer;
const
screensegment: word = $B000;
coloroffset: word = $8000;
begin
coloroffset:=displayadapteroffset;
if inz38flag<>'1' then initialize38;
checkinputinhibit;
calculateoffset(endrow,endcolumn);
endaddress:=currentoffset;
calculateoffset(startrow,startcolumn);
textcolor(15);
textbackground(1);
coloroffset:=currentoffset + currentoffset + coloroffset;
bytecount:=(endaddress-currentoffset) + 1;
if bytecount>80 then bytecount:=80;
repeat
copyfield(bytecount,0,dummyptr);
for bufferindex:=1 to bytecount do begin
mem[screensegment:coloroffset]:=
mem[inpbuffersegment:inpbufferoffset + (bufferindex-1)];
coloroffset:=coloroffset + 2;
end;
currentoffset:=currentoffset + bytecount;
until currentoffset>=endaddress;
coloroffset:=displayadapteroffset;
end;
procedure check38;
var endrow,endcol: shortint;
begin
endrow:=startrow;
endcol:=startcol+lengthx-1;
if endcol>80 then begin
endrow:=endrow + 1;
endcol:=endcol-80;
end;
copyscreen(startrow,startcol,endrow,endcol);
rtnformat:=copy(inpbuffer,1,lengthx);
end;
begin
inpbuffersegment:=seg(inpbuffer);
inpbufferoffset:=ofs(inpbuffer) + 1;
inz38flag:='1';
em5250segment:=memw[0000:$0036];
screenoffset:=memw[em5250segment:$0146];
ebcdictableoffset:=memw[em5250segment:$0140];
fillchar(blanktest,81,' ');
blanktest[0]:=chr(80);
while mem[em5250segment:systemavailable]=0 do begin
statusmessage:='Waiting For System Available';
emulatorstatusmessage;
end;
end.