435 lines
7.8 KiB
Modula-2
435 lines
7.8 KiB
Modula-2
(*$R-*)
|
|
IMPLEMENTATION MODULE InOut ;
|
|
|
|
IMPORT Unix;
|
|
IMPORT Conversions;
|
|
IMPORT Traps;
|
|
FROM TTY IMPORT isatty;
|
|
FROM SYSTEM IMPORT ADR;
|
|
|
|
CONST BUFSIZ = 1024; (* Tunable *)
|
|
TAB = 11C;
|
|
|
|
TYPE IOBuf = RECORD
|
|
fildes: INTEGER;
|
|
cnt: INTEGER;
|
|
maxcnt: INTEGER;
|
|
bufferedcount: INTEGER;
|
|
buf: ARRAY [1..BUFSIZ] OF CHAR;
|
|
END;
|
|
numbuf = ARRAY[0..255] OF CHAR;
|
|
|
|
VAR ibuf, obuf: IOBuf;
|
|
unread: BOOLEAN;
|
|
unreadch: CHAR;
|
|
|
|
PROCEDURE Read(VAR c : CHAR);
|
|
BEGIN
|
|
IF unread THEN
|
|
unread := FALSE;
|
|
c := unreadch;
|
|
Done := TRUE;
|
|
ELSE
|
|
WITH ibuf DO
|
|
IF cnt <= maxcnt THEN
|
|
c := buf[cnt];
|
|
INC(cnt);
|
|
Done := TRUE;
|
|
ELSE
|
|
c := FillBuf(ibuf);
|
|
END;
|
|
END;
|
|
END;
|
|
END Read;
|
|
|
|
PROCEDURE UnRead(ch: CHAR);
|
|
BEGIN
|
|
unread := TRUE;
|
|
unreadch := ch;
|
|
END UnRead;
|
|
|
|
PROCEDURE FillBuf(VAR ib: IOBuf) : CHAR;
|
|
VAR c : CHAR;
|
|
BEGIN
|
|
WITH ib DO
|
|
maxcnt := Unix.read(fildes, ADR(buf), bufferedcount);
|
|
cnt := 2;
|
|
Done := maxcnt > 0;
|
|
IF NOT Done THEN
|
|
c := 0C;
|
|
ELSE
|
|
c := buf[1];
|
|
END;
|
|
END;
|
|
RETURN c;
|
|
END FillBuf;
|
|
|
|
PROCEDURE Flush(VAR ob: IOBuf);
|
|
VAR dummy: INTEGER;
|
|
BEGIN
|
|
WITH ob DO
|
|
dummy := Unix.write(fildes, ADR(buf), cnt);
|
|
cnt := 0;
|
|
END;
|
|
END Flush;
|
|
|
|
PROCEDURE Write(c: CHAR);
|
|
BEGIN
|
|
WITH obuf DO
|
|
INC(cnt);
|
|
buf[cnt] := c;
|
|
IF cnt >= bufferedcount THEN
|
|
Flush(obuf);
|
|
END;
|
|
END;
|
|
END Write;
|
|
|
|
PROCEDURE OpenInput(defext: ARRAY OF CHAR);
|
|
VAR namebuf : ARRAY [1..256] OF CHAR;
|
|
BEGIN
|
|
IF ibuf.fildes # 0 THEN
|
|
CloseInput;
|
|
END;
|
|
MakeFileName("Name of input file: ", defext, namebuf);
|
|
IF NOT Done THEN RETURN; END;
|
|
IF (namebuf[1] = '-') AND (namebuf[2] = 0C) THEN
|
|
ELSE
|
|
WITH ibuf DO
|
|
fildes := Unix.open(ADR(namebuf), 0);
|
|
Done := fildes >= 0;
|
|
maxcnt := 0;
|
|
cnt := 1;
|
|
END;
|
|
END;
|
|
END OpenInput;
|
|
|
|
PROCEDURE OpenInputFile(filename: ARRAY OF CHAR);
|
|
BEGIN
|
|
IF ibuf.fildes # 0 THEN
|
|
CloseInput;
|
|
END;
|
|
IF (filename[0] = '-') AND (filename[1] = 0C) THEN
|
|
ELSE
|
|
WITH ibuf DO
|
|
fildes := Unix.open(ADR(filename), 0);
|
|
Done := fildes >= 0;
|
|
maxcnt := 0;
|
|
cnt := 1;
|
|
END;
|
|
END;
|
|
END OpenInputFile;
|
|
|
|
PROCEDURE CloseInput;
|
|
BEGIN
|
|
WITH ibuf DO
|
|
IF (fildes > 0) AND (Unix.close(fildes) < 0) THEN
|
|
;
|
|
END;
|
|
fildes := 0;
|
|
maxcnt := 0;
|
|
cnt := 1;
|
|
END;
|
|
END CloseInput;
|
|
|
|
PROCEDURE OpenOutput(defext: ARRAY OF CHAR);
|
|
VAR namebuf : ARRAY [1..256] OF CHAR;
|
|
BEGIN
|
|
IF obuf.fildes # 1 THEN
|
|
CloseOutput;
|
|
END;
|
|
MakeFileName("Name of output file: ", defext, namebuf);
|
|
IF NOT Done THEN RETURN; END;
|
|
IF (namebuf[1] = '-') AND (namebuf[2] = 0C) THEN
|
|
ELSE
|
|
WITH obuf DO
|
|
fildes := Unix.creat(ADR(namebuf), 666B);
|
|
Done := fildes >= 0;
|
|
bufferedcount := BUFSIZ;
|
|
cnt := 0;
|
|
END;
|
|
END;
|
|
END OpenOutput;
|
|
|
|
PROCEDURE OpenOutputFile(filename: ARRAY OF CHAR);
|
|
BEGIN
|
|
IF obuf.fildes # 1 THEN
|
|
CloseOutput;
|
|
END;
|
|
IF (filename[0] = '-') AND (filename[1] = 0C) THEN
|
|
ELSE
|
|
WITH obuf DO
|
|
fildes := Unix.creat(ADR(filename), 666B);
|
|
Done := fildes >= 0;
|
|
bufferedcount := BUFSIZ;
|
|
cnt := 0;
|
|
END;
|
|
END;
|
|
END OpenOutputFile;
|
|
|
|
PROCEDURE CloseOutput;
|
|
BEGIN
|
|
Flush(obuf);
|
|
WITH obuf DO
|
|
IF (fildes # 1) AND (Unix.close(fildes) < 0) THEN
|
|
;
|
|
END;
|
|
fildes := 1;
|
|
bufferedcount := 1;
|
|
cnt := 0;
|
|
END;
|
|
END CloseOutput;
|
|
|
|
PROCEDURE MakeFileName(prompt, defext : ARRAY OF CHAR;
|
|
VAR buf : ARRAY OF CHAR);
|
|
VAR i : INTEGER;
|
|
j : CARDINAL;
|
|
ch: CHAR;
|
|
BEGIN
|
|
Done := TRUE;
|
|
IF isatty(0) THEN
|
|
XWriteString(prompt);
|
|
END;
|
|
XReadString(buf);
|
|
i := 0;
|
|
WHILE buf[i] # 0C DO i := i + 1 END;
|
|
IF i # 0 THEN
|
|
i := i - 1;
|
|
IF buf[i] = '.' THEN
|
|
FOR j := 0 TO HIGH(defext) DO
|
|
i := i + 1;
|
|
buf[i] := defext[j];
|
|
END;
|
|
buf[i+1] := 0C;
|
|
END;
|
|
RETURN;
|
|
END;
|
|
Done := FALSE;
|
|
END MakeFileName;
|
|
|
|
PROCEDURE ReadInt(VAR integ : INTEGER);
|
|
CONST
|
|
SAFELIMITDIV10 = MAX(INTEGER) DIV 10;
|
|
SAFELIMITREM10 = MAX(INTEGER) MOD 10;
|
|
TYPE
|
|
itype = [0..31];
|
|
ibuf = ARRAY itype OF CHAR;
|
|
VAR
|
|
int : INTEGER;
|
|
neg : BOOLEAN;
|
|
safedigit: [0 .. 9];
|
|
chvalue: CARDINAL;
|
|
buf : ibuf;
|
|
index : itype;
|
|
BEGIN
|
|
ReadString(buf);
|
|
IF NOT Done THEN
|
|
RETURN
|
|
END;
|
|
index := 0;
|
|
IF buf[index] = '-' THEN
|
|
neg := TRUE;
|
|
INC(index);
|
|
ELSIF buf[index] = '+' THEN
|
|
neg := FALSE;
|
|
INC(index);
|
|
ELSE
|
|
neg := FALSE
|
|
END;
|
|
|
|
safedigit := SAFELIMITREM10;
|
|
IF neg THEN safedigit := safedigit + 1 END;
|
|
int := 0;
|
|
WHILE (buf[index] >= '0') & (buf[index] <= '9') DO
|
|
chvalue := ORD(buf[index]) - ORD('0');
|
|
IF (int > SAFELIMITDIV10) OR
|
|
( (int = SAFELIMITDIV10) AND
|
|
(chvalue > safedigit)) THEN
|
|
Traps.Message("integer too large");
|
|
HALT;
|
|
ELSE
|
|
int := 10*int + VAL(INTEGER, chvalue);
|
|
INC(index)
|
|
END;
|
|
END;
|
|
IF neg THEN
|
|
integ := -int
|
|
ELSE
|
|
integ := int
|
|
END;
|
|
IF buf[index] > " " THEN
|
|
Traps.Message("illegal integer");
|
|
HALT;
|
|
END;
|
|
Done := TRUE;
|
|
END ReadInt;
|
|
|
|
PROCEDURE ReadCard(VAR card : CARDINAL);
|
|
CONST
|
|
SAFELIMITDIV10 = MAX(CARDINAL) DIV 10;
|
|
SAFELIMITREM10 = MAX(CARDINAL) MOD 10;
|
|
|
|
TYPE
|
|
itype = [0..31];
|
|
ibuf = ARRAY itype OF CHAR;
|
|
|
|
VAR
|
|
int : CARDINAL;
|
|
index : itype;
|
|
buf : ibuf;
|
|
safedigit: [0 .. 9];
|
|
chvalue: CARDINAL;
|
|
BEGIN
|
|
ReadString(buf);
|
|
IF NOT Done THEN RETURN; END;
|
|
index := 0;
|
|
safedigit := SAFELIMITREM10;
|
|
int := 0;
|
|
WHILE (buf[index] >= '0') & (buf[index] <= '9') DO
|
|
chvalue := ORD(buf[index]) - ORD('0');
|
|
IF (int > SAFELIMITDIV10) OR
|
|
( (int = SAFELIMITDIV10) AND
|
|
(chvalue > safedigit)) THEN
|
|
Traps.Message("cardinal too large");
|
|
HALT;
|
|
ELSE
|
|
int := 10*int + chvalue;
|
|
INC(index);
|
|
END;
|
|
END;
|
|
IF buf[index] > " " THEN
|
|
Traps.Message("illegal cardinal");
|
|
HALT;
|
|
END;
|
|
card := int;
|
|
Done := TRUE;
|
|
END ReadCard;
|
|
|
|
PROCEDURE ReadString(VAR s : ARRAY OF CHAR);
|
|
TYPE charset = SET OF CHAR;
|
|
VAR i : CARDINAL;
|
|
ch : CHAR;
|
|
|
|
BEGIN
|
|
i := 0;
|
|
REPEAT
|
|
Read(ch);
|
|
UNTIL NOT (ch IN charset{' ', TAB, 12C, 15C});
|
|
IF NOT Done THEN
|
|
RETURN;
|
|
END;
|
|
UnRead(ch);
|
|
REPEAT
|
|
Read(ch);
|
|
termCH := ch;
|
|
IF i <= HIGH(s) THEN
|
|
s[i] := ch;
|
|
IF (NOT Done) OR (ch <= " ") THEN
|
|
s[i] := 0C;
|
|
END;
|
|
END;
|
|
INC(i);
|
|
UNTIL (NOT Done) OR (ch <= " ");
|
|
IF Done THEN UnRead(ch); END;
|
|
END ReadString;
|
|
|
|
PROCEDURE XReadString(VAR s : ARRAY OF CHAR);
|
|
VAR i : INTEGER;
|
|
j : CARDINAL;
|
|
ch : CHAR;
|
|
|
|
BEGIN
|
|
j := 0;
|
|
LOOP
|
|
i := Unix.read(0, ADR(ch), 1);
|
|
IF i < 0 THEN
|
|
EXIT;
|
|
END;
|
|
IF ch <= " " THEN
|
|
s[j] := 0C;
|
|
EXIT;
|
|
END;
|
|
IF j < HIGH(s) THEN
|
|
s[j] := ch;
|
|
INC(j);
|
|
END;
|
|
END;
|
|
END XReadString;
|
|
|
|
PROCEDURE XWriteString(s: ARRAY OF CHAR);
|
|
VAR i: CARDINAL;
|
|
BEGIN
|
|
i := 0;
|
|
LOOP
|
|
IF (i <= HIGH(s)) AND (s[i] # 0C) THEN
|
|
INC(i);
|
|
ELSE
|
|
EXIT;
|
|
END;
|
|
END;
|
|
IF Unix.write(1, ADR(s), i) < 0 THEN
|
|
;
|
|
END;
|
|
END XWriteString;
|
|
|
|
PROCEDURE WriteCard(card, width : CARDINAL);
|
|
VAR
|
|
buf : numbuf;
|
|
BEGIN
|
|
Conversions.ConvertCardinal(card, width, buf);
|
|
WriteString(buf);
|
|
END WriteCard;
|
|
|
|
PROCEDURE WriteInt(int : INTEGER; width : CARDINAL);
|
|
VAR
|
|
buf : numbuf;
|
|
BEGIN
|
|
Conversions.ConvertInteger(int, width, buf);
|
|
WriteString(buf);
|
|
END WriteInt;
|
|
|
|
PROCEDURE WriteHex(card, width : CARDINAL);
|
|
VAR
|
|
buf : numbuf;
|
|
BEGIN
|
|
Conversions.ConvertHex(card, width, buf);
|
|
WriteString(buf);
|
|
END WriteHex;
|
|
|
|
PROCEDURE WriteLn;
|
|
BEGIN
|
|
Write(EOL)
|
|
END WriteLn;
|
|
|
|
PROCEDURE WriteOct(card, width : CARDINAL);
|
|
VAR
|
|
buf : numbuf;
|
|
BEGIN
|
|
Conversions.ConvertOctal(card, width, buf);
|
|
WriteString(buf);
|
|
END WriteOct;
|
|
|
|
PROCEDURE WriteString(str : ARRAY OF CHAR);
|
|
VAR
|
|
nbytes : CARDINAL;
|
|
BEGIN
|
|
nbytes := 0;
|
|
WHILE (nbytes <= HIGH(str)) AND (str[nbytes] # 0C) DO
|
|
Write(str[nbytes]);
|
|
INC(nbytes)
|
|
END;
|
|
END WriteString;
|
|
|
|
BEGIN (* InOut initialization *)
|
|
WITH ibuf DO
|
|
fildes := 0;
|
|
bufferedcount := BUFSIZ;
|
|
maxcnt := 0;
|
|
cnt := 1;
|
|
END;
|
|
WITH obuf DO
|
|
fildes := 1;
|
|
bufferedcount := 1;
|
|
cnt := 0;
|
|
END;
|
|
END InOut.
|