-- card: 34332 from stack: in.5
-- bmap block id: 9472
-- flags: 0000
-- background id: 3858
-- name: FileSize
----- HyperTalk script -----
on HideObjects
  hide cd btn "Try It!"
end HideObjects

on ShowObjects
  show cd btn "Try It!"
end ShowObjects


-- part 2 (button)
-- low flags: 00
-- high flags: A002
-- rect: left=82 top=185 right=219 bottom=175
-- title width / last selected line: 0
-- icon id / first selected line: 0 / 0
-- text alignment: 1
-- font id: 0
-- text size: 12
-- style flags: 8192
-- line height: 16
-- part name: Try it!
----- HyperTalk script -----
on mouseUp
  global errGlobal
  put FilePath("", "Choose a file please.") into fileName
  if fileName = empty then exit mouseUp
  put FileSize(fileName, "nodialog:errGlobal") into fSize
  if errGlobal ≠ empty then
    answer "Error: “" & errGlobal & "”"
    put empty into errGlobal
  else
    answer "“" & fileName & "” takes" && fSize && "bytes of valuable" && "disk space."
  end if
end mouseUp




-- part contents for background part 38
----- text -----
19/50

-- part contents for background part 20
----- text -----
FileSize - An XFCN to return the size of a specified file

FileSize(pathname, <"noDialog:"errorGlobal>)

This XFCN will return the size of the file specified by the first parameter in BYTES not K.  It currently can not return the size of a folder, but that will be fixed soon.


-- part contents for background part 42
----- text -----
{ FileSize(pathname «,"nodialog":errGlobal»)                      }
{ XFCN to return the creator for the file specified by      }
{ the path given in the first parameter.                        }
{}
{}
{   Written by:      Anup Murarka         Eric Carlson                 }
{               ALINK:  SKEPTIC       ALINK:  cyNic           }
{                                   CIS:  76004,3356}
{}
{               We are part of the Support Tools Development Group,     }
{               Apple Computer, Inc.      }
{}
{               please DO NOT contack Mac DTS for support of this code!    }
{}
{               please DO contact the authors for support of this code!     }
{}
{               Send comments, bug reports, requests to any of the above   }
{               E-mail addresses or to:}
{}
{                           (one of us)                  }
{                           Apple Computer, Inc.          }
{                           900 E. Hamilton, Ave.          }
{                           Campbell, CA   95008      }
{                           M/S 72-L                     }
{}
{   Copyright:   © 1989, 1990 by Apple Computer, Inc., all rights reserved.     }
{}
{ written by    : Anup Murarka                                                                               }
{ AppleLink  : Skeptic                                                                                      }
{ modification history                                                                                        }
{          Date              Initials                                    Comments                                   }
{          ----          ------          --------------------------------------------------     }
{       8/16/89           akm         first written                                                                   }
{       5/21/90           ec            removed upper case converion for A/UX compatibility.  }
{                                           Changed version to 1.1                                                  }
{}
unit FileSize;

interface

    uses
        HyperXcmd;

    procedure MAIN (paramPtr: XCmdPtr);

implementation

    procedure FileSize (paramPtr: XCmdPtr);
    FORWARD;

    procedure MAIN (paramPtr: XCmdPtr);
    begin
        FileSize(paramPtr);
    end;

    procedure reportToUser (paramPtr: XCmdPtr;
                                    msgStr: str255);
{}
{ report something back to the user.  }
{ the last parameter (optional) to an external may contain }
 { "noDialog" or "noDialog:GlobalName".  GlobalName is the name }
 { of a HyperTalk global variable into which error messages will be }
 { placed.  we've decided to use this approach to avoid confusing }
{ an error message with a valid result being returned from an XFCN. }
{}
        var
            tempStr: str255;
    begin
{check the last param to see if the user requested that}
{ we suppress the error dialog }
        ZeroToPas(paramPtr, paramPtr^.params[paramPtr^.paramCount]^, tempStr);
        UprString(tempStr, true);
        if pos('NODIALOG', tempStr) = 0 then
    { no special error handling specified, throw up a dialog and return the error message }
            begin
                SendCardMessage(paramPtr, concat('answer "', msgStr, '"'));
                paramPtr^.returnValue := PasToZero(paramPtr, msgStr);
            end
        else if (pos(':', tempStr) > 0) then
    { requested global AND noDialog so we fill in the global and return empty }
            begin
                tempStr := copy(tempStr, pos(':', tempStr) + 1, length(tempStr));
                                                        { get the name of the HC global  to fill }
                SetGlobal(paramPtr, tempStr, PasToZero(paramPtr, msgStr));
                                                        { and fill it }
                paramPtr^.returnValue := PasToZero(paramPtr, '');      { return empty }
            end
        else
    { requested noDialog only so we return the error condition as the result }
            paramPtr^.returnValue := PasToZero(paramPtr, msgStr);
    end;     { procedure }

    function AskedForHelp (paramPtr: XCmdPtr;
                                    syntaxMsg: Str255;
                                    copyrightMsg: Str255): boolean;
{   check to see if the user sent a '?' or a '!' as }
{ the only parameter. if so we will respond with }
{ the calling syntax or the copyright/version info }
{ for this external }
{}
        var
            firstStr: str255;
    begin
        askedForHelp := false;
        if paramPtr^.paramCount = 1 then
            begin
                ZeroToPas(paramPtr, paramPtr^.params[1]^, firstStr);
                    { what is the first param? }
                if firstStr = '?' then
                    begin
                        reportToUser(paramPtr, syntaxMsg);
                        askedForHelp := true
                    end  { asked for help }
                else if firstStr = '!' then
                    begin
                        reportToUser(paramPtr, copyRightMsg);
                        askedForHelp := true
                    end;     { asked for copyright info }
            end;     { one parameter passed }
    end;     { function }

    function LongToString (paramPtr: XCmdPtr;
                                    num: LONGINT): Str255;
{ why, oh why did dan write this one as a procedure??? }
        var
            tempStr: str255;
    begin
        LongToStr(paramPtr, num, tempStr);
        LongToString := tempStr;
    end;

    function NumberToString (paramPtr: XCmdPtr;
                                    num: LONGINT): Str255;
{ use the toolbox call rather than HC's }
        var
            tempStr: str255;
    begin
        NumToString(num, tempStr);
        NumberToString := tempStr;
    end;

    procedure reportResError (paramPtr: XCmdPtr;
                                    errorNum: integer);
        var
            errMsg, tempName: str255;
    begin
        case errorNum of                   { what caused the problem? }
            -0: 
                errMsg := 'no error.';
            -36: 
                errMsg := 'I/O Error.';
            -37: 
                errMsg := 'bad file name or volume name.';
            -38: 
                errMsg := 'file not open.';
            -39: 
                errMsg := 'that file has no resource fork.';
            -42: 
                errMsg := 'too many files open.';
            -43: 
                errMsg := 'file not found.';
            -45, -54, -61: 
                errMsg := 'file locked.';
            -47, -49: 
                errMsg := 'file is busy.';
            -53: 
                errMsg := 'that volume is not on line.';
            -108: 
                errMsg := 'not enough room in heap zone.';
            -120: 
                errMsg := 'directory not found.';
            -121: 
                errMsg := 'too many working directories open.';
            -127: 
                errMsg := 'internal file system error.';
            -192: 
                errMsg := 'resource not found.';
            -193: 
                errMsg := 'file not found.';
            otherwise
                errMsg := concat('unexpected error #', NumberToString(paramPtr, errorNum));
        end;         { case }

        errMsg := concat('Sorry, ', errMsg);
        reportToUser(paramPtr, errMsg);
        { return the error message }
    end;         { function }

    function BitTest (AddressToCheck: ptr;
                                    TotalBits: integer;
                                    BitToTest: longint): boolean;
    { function that allows caller to use std. 68000 bit notation instead of the Toolbox's reversed notation}
    { example:  bit 0 (the least significant bit) in a byte is bit 7 in the Toolbox's notation}
    begin
        BitTest := BitTst(AddressToCheck, TotalBits - 1 - BitToTest);
    end;

    function getParams (paramPtr: XCmdPtr;
                                    var PathToFile: str255): boolean;
    { function to get the parameters and validate them.  Returns boolean}
    { instructing the main procedure to continue if the parameters passed}
    { are valid.  Also returns syntax messages if requested by the user.}
        var
            numParams: integer;
            syntaxStr, copyrightStr: str255;

    begin
        getParams := true;     {Initially, assume the parameters are valid.}
        syntaxStr := 'FileSize(pathname «, “nodialog”:errGlobal»)';
        copyrightStr := '© 1989,1990 Apple Computer, Inc., v.1.1, by Anup Murarka';

        {check that we have the proper number of parameters}
        numParams := paramPtr^.paramCount;
        if (numParams < 1) or (numParams > 2) then
            begin
                getParams := false;
                reportToUser(paramPtr, syntaxStr);
                exit(getParams);
            end;

        if AskedForHelp(paramPtr, syntaxStr, copyrightStr) then
            begin
                getParams := false;
                exit(getParams);
            end;

        { Get first parameter}
        ZeroToPas(paramPtr, paramPtr^.Params[1]^, PathToFile);
    end;     {GetParams}

    procedure FileSize (paramPtr: XCmdPtr);
        var
            getParamsOK: boolean;
            FileName: str255;
            paramBlock: CInfoPBRec;
            vFileSize: longint;
            errorCode: OSerr;

    begin   { filesize}
    { fetch and validate the passed parameters}
        getParamsOK := getParams(paramPtr, FileName);
        if not (getParamsOK) then
            exit(filesize);

    { Initialize the parameter block.  Since we have the full pathname,}
    { no other field is really needed.}
        zeroBytes(paramPtr, @paramBlock, sizeOf(paramBlock));
        paramBlock.ioNamePtr := @FileName;

        errorCode := PBGetCatInfo(@paramBlock, FALSE);
        if errorCode <> noErr then
            begin
                reportResError(paramPtr, errorCode);
                exit(filesize);
            end;

    { Is it a file or a directory?}
        if BitTest(@paramBlock.ioFlAttrib, 8, 4) then
            begin
                reportToUser(paramPtr, 'Sorry, I can not get the size of a directory (yet)!');
                exit(FileSize);
            end;

    { Now prepare the return value.  Use FileName as a temp variable}
        vFileSize := paramBlock.ioFlLgLen + paramBlock.ioFlRLgLen;

        FileName := LongToString(paramPtr, vFileSize);
        paramPtr^.returnValue := PasToZero(paramPtr, FileName);
    end;

end.