SysFileRemove, file remove

Sostituisce la funzione Sysremove modificando il tipo di parametri in ingresso da stringa a puntatore a stringa. La precedente dichiarazione:

i:=Sysremove('C:\Directory\File.txt');

Diventa:

i:=SysFileRemove(ADR('C:\Directory\File.txt'));

PROGRAM ST_SysFileRemove
VAR
    Remove : BOOL; (* Remove command *)
    ECode : UDINT; (* Error code *)
END_VAR

// *****************************************************************************
// PROGRAM "ST_SysFileRemove"
// *****************************************************************************
// By setting the Remove command a file is deleted.
// -----------------------------------------------------------------------------

    IF (Remove) THEN
        Remove:=FALSE; //Remove command

        // Checks if file is present on disk and deletes it.

        IF (SysGetFileLen(ADR('C:\Directory\File.txt')) <> eEOF) THEN
            IF NOT(SysFileRemove(ADR('C:\Directory\File.txt'))) THEN
                ECode:=SysGetLastError(TRUE); //Error code
            END_IF;
        END_IF;
    END_IF;

// [End of file]

PROGRAM ST_DeleteOldFiles
VAR
    LogOn : BOOL; (* Write log command *)
    i : UDINT; (* Auxiliary variable *)
    j : INT; (* Auxiliary variable *)
    LMonth : INT; (* Log mount *)
    Fp : eFILEP; (* File pointer *)
    Filename : STRING[ 32 ]; (* File name *)
    LRecord : STRING[ 64 ]; (* Log record *)
    Text : STRING[ 16 ]; (* Log text *)
    Months : ARRAY[0..11] OF @STRING; (* Month file names *)
    LDTS : LDATETIMESTRUCT; (* Long Date/Time struct *)
END_VAR

// *****************************************************************************
// PROGRAM "ST_DeleteOldFiles"
// *****************************************************************************
// A simple data logger that stores a text record on a monthly file. At every
// new month only the 6 older months than the current one are kept in the
// defined directory.
// -----------------------------------------------------------------------------

    // -------------------------------------------------------------------------
    // INITIALIZATIONS
    // -------------------------------------------------------------------------
    // At first execution loop the month file names are defined.

    IF (SysFirstLoop) THEN
        Months[0]:=ADR('January'); 
        Months[1]:=ADR('February');
        Months[2]:=ADR('March');
        Months[3]:=ADR('April');
        Months[4]:=ADR('May');
        Months[5]:=ADR('June');
        Months[6]:=ADR('July');
        Months[7]:=ADR('August');
        Months[8]:=ADR('September');
        Months[9]:=ADR('October');
        Months[10]:=ADR('November');
        Months[11]:=ADR('December');
    END_IF;

    // -------------------------------------------------------------------------
    // CREATES LOG RECORD
    // -------------------------------------------------------------------------
    // If the "LogOn" is set by debug a new record is written in the log file.    

    IF NOT(LogOn) THEN RETURN; END_IF;
    LogOn:=FALSE; //Write log command
    Text:='This is a log'; //Log text
    
    // Creates the log record to be written.

    i:=DateTimeFormat(TO_LDATE_AND_TIME(SysDateGetNs()), ADR('^d/m/Y\ H\:i\:s'), ADR(LRecord), SIZEOF(LRecord));
    i:=SysCVsnprintf(ADR(LRecord), SIZEOF(LRecord), ADR(' %s$r$n'), STRING_TYPE, ADR(Text));

    // -------------------------------------------------------------------------
    // DELETES OLD FILES
    // -------------------------------------------------------------------------
    // Assign data values.

    i:=SPLIT_DT(TO_DATE_AND_TIME(SysDateGetS()), ADR(LDTS.Year), ADR(LDTS.Month), ADR(LDTS.Day), ADR(LDTS.Hours), ADR(LDTS.Minutes), ADR(LDTS.Seconds));

    // Checks if the month has been changed after last record write.

    IF (LDTS.Month <> LMonth) THEN
        LMonth:=LDTS.Month; //Log mount

        // Deletes the 6 months older than the current month.

        FOR j:=(LMonth+1) TO (LMonth+6) DO
            IF (j > 12) THEN i:=j-12; ELSE i:=j; END_IF;

            i:=SysVsnprintf(ADR(Filename), SIZEOF(Filename), ADR('D:/Logs/%s.txt'), STRING_TYPE, Months[i-1]);
            IF (SysGetFileLen(ADR(Filename)) <> eEOF) THEN i:=SysFileRemove(ADR(Filename)); END_IF;
            i:=SysWrSpyData(SPY_ASCII, 0, 16#00000001, ADR('Checked'), ADR(Filename));
        END_FOR;
    END_IF;

    // -------------------------------------------------------------------------
    // WRITE LOG FILE
    // -------------------------------------------------------------------------
    // Creates the log file name.

    i:=SysVsnprintf(ADR(Filename), SIZEOF(Filename), ADR('D:/Logs/%s.txt'), STRING_TYPE, Months[LMonth-1]);
    Fp:=SysFfopen(ADR(Filename), ADR('a')); //File pointer

    IF (SysFIsOpen(Fp)) THEN
        i:=Sysfwrite(ADR(LRecord), TO_INT(Sysstrlen(ADR(LRecord))), 1, Fp);
        i:=Sysfclose(Fp);
    END_IF;

// [End of file]

PROGRAM ST_DeleteFilesByDate
VAR
    i : UDINT; (* Auxiliary variable *)
    Delete : BOOL; (* Delete files command *)
    CaseNr : USINT; (* Program case *)
    FFound : USINT; (* Files found *)
    DList : SysGetFileInfos; (* Directory listing *)
    FDeleted : USINT; (* Files deleted *)
    FRemove : STRING[ 64 ]; (* File to remove *)
END_VAR

// *****************************************************************************
// PROGRAM "ST_DeleteFilesByDate"
// *****************************************************************************
// Setting by debug the "Delete" variable, are deleted from the defined path all
// files older than 2 days.
// -----------------------------------------------------------------------------

    // -------------------------------------------------------------------------
    // DIRECTORY LISTING MANAGEMENT
    // -------------------------------------------------------------------------
    // Manage the directory listing.

    DList.PathName:=ADR('MyDir'); //Directory to list
    DList(); //Directory listing
    DList.Init:=FALSE; //Init listing
    DList.Next:=FALSE; //Next command

    // -------------------------------------------------------------------------
    // PROGRAM CASES
    // -------------------------------------------------------------------------
    // Program case management.

    CASE (CaseNr) OF

        // ---------------------------------------------------------------------
        // Wait for delete command ad init listing.

        0:
        IF NOT(Delete) THEN RETURN; END_IF;
        Delete:=FALSE; //Delete files command
        FFound:=0; //Files found
        FDeleted:=0; //Files deleted
        DList.Init:=TRUE; //Init listing
        CaseNr:=CaseNr+1; //Program case

        // ---------------------------------------------------------------------
        // If file found returns file data.

        1:
        IF NOT(DList.Found) THEN CaseNr:=0; RETURN; END_IF;
        FFound:=FFound+1; //Files found

        // Check if file date is older than 2 days (172800 seconds).

        IF (DList.FTime > (SysDateTime-172800)) THEN RETURN; END_IF;

        // Delete the file from disk.

        i:=SysVsnprintf(ADR(FRemove), SIZEOF(FRemove), ADR('%s/'), STRING_TYPE, ADR(DList.PathName));
        i:=SysCVsnprintf(ADR(FRemove), SIZEOF(FRemove), ADR('%s'), STRING_TYPE, ADR(DList.Name));
        i:=SysFileRemove(ADR(FRemove)); //Delete file
        FDeleted:=FDeleted+1; //Files deleted
        DList.Next:=TRUE; //Next command
    END_CASE;

// [End of file]