EMILE/libmacos/SerGetBuf.c

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/*
*
* (c) 2004,2005 Laurent Vivier <Laurent@lvivier.info>
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*
*/
#include <sys/types.h>
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#include <macos/devices.h>
#include <macos/serial.h>
OSErr SerGetBuf(short refNum, long *count)
{
int res;
CntrlParam param;
param.ioCompletion = 0;
param.ioVRefNum = 0;
param.ioCRefNum = refNum;
param.csCode = kSERDInputCount;
res = PBStatusSync((ParmBlkPtr)&param);
*count = *(long*)param.csParam;
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return res;
}