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SPortBufferSize.p
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1988-11-18
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(*
SPortBufferSize() -- Returns the size of the current input buffer, or zero if the default buffer is
begin used.
To compile and link this file using Macintosh Programmer's Workshop,
pascal -w SPortBufferSize.p
link -m ENTRYPOINT -o HyperCommands -rt XFCN=7034 -sn Main=SPortBufferSize ∂
SPortBufferSize.p.o "{MPW}"Libraries:interface.o
© Copyright 1987,88 by Apple Computer, Inc.
Initial coding 9/87 by Harry R. Chesley.
*)
{$R-}
{$S SPortBufferSize } { Segment name must be the same as the command name. }
unit DummyUnit;
interface
uses MemTypes, QuickDraw, OSIntf, HyperXCmd;
procedure EntryPoint(paramPtr: XCmdPtr);
implementation
type
Str31 = String[31];
procedure SPortBufferSize(paramPtr: XCmdPtr); forward;
procedure EntryPoint(paramPtr: XCmdPtr);
begin
SPortBufferSize(paramPtr);
end;
procedure SPortBufferSize(paramPtr: XCmdPtr);
var l: longInt;
{$I XCmdGlue.inc}
procedure Fail(errMsg: Str255); { set theResult and quit }
begin
paramPtr^.returnValue := PasToZero(errMsg);
exit(SPortBufferSize);
end;
{$I SPortUtil.inc}
begin
if paramPtr^.paramCount <> 0 then Fail('parameter count is not 0');
SetUpSPortGlobals;
EnsureOpenPort;
{ Find and return the size of the current buffer (or zero if the default buffer is being used). }
if ThisSPort.inputBuffer = nil then l := 0
else l := GetPtrSize(ThisSPort.inputBuffer);
paramPtr^.returnValue := PasToZero(LongToStr(l))
end;
end.