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netmindz/gist:853267

Created March 3, 2011 18:49
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Buffer JNA issue
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gistfile1.java
// C++ header
extern "C" __declspec(dllexport) int __stdcall API_USBMF_Request(
HANDLE commHandle, int DeviceAddress,
unsigned char inf_mode, unsigned char *Buffer);
// Java - Returns a single byte, which I think is a valid result
public int API_USBMF_Request(HANDLE commHandle, int DeviceAddress, char inf_mode, ByteByReference Buffer);
// Java - No change to byte array
public int API_USBMF_Request(HANDLE commHandle, int DeviceAddress, char inf_mode, byte[] Buffer);
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netmindz commented Mar 3, 2011

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I just tried using PointerByReference, and that appears to kind of give me something. If i toString the Pointer i get a nice native@0x123456 kinda thing, so i just need to work out how to to the Pointer equivalent of Native.toString(byte[] blah)

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netmindz commented Mar 3, 2011

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Not sure what the jna ByReference does, but byte[] definitely doesn't work

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netmindz commented Mar 3, 2011

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Any ideas why using Pointer.getString() failed with access exception, weridly using IntByReferernce returns values, though quite what this number is when what I want is a String I'm not sure. Some native thing ?

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