[fpc-pascal]Apple Mac pointer problem
Stephen Downs
stephend at e-tempest.co.uk
Thu Sep 23 20:49:47 CEST 2004
I am porting a Mac CodeWarrior project to FreePascal and have hit a
compile problem with a pointer. In my original code I have a structure
defined along the lines of
testData = record
testIndex : array [0..12] of integer;
end;
testDataPointer = ^testData;
testDataHandle = ^testDataPointer;
Within my main code I open a file and try to read it into my structure
testDataHdl := testDataHandle(NewHandleClear(sizeof(testData)));
OSError := FSRead(fileRefNum, numberOfBytes, testDataHdl^)
The FSRead line fails with error: 62: Incompatible type for arg no. 3:
Got "testDataPointer", expected "Ptr" - the third parameter for FSRead is a
pointer. I presume this is because FreePascal uses typed pointers. I
tried replacing testDataHdl^ by Ptr(testDataHdl)^ but that gives a
similar error - Got "ShortInt", expected "Ptr"
Does anyone know how I can get around this?
regards... Steve
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