www.pudn.com > ejip.zip > DbgUdp.java

package util; 
 
/** 
*	buffered debug output for UDP debug. 
*/ 
 
public class DbgUdp extends Dbg { 
 
	private static final int BUF_LEN = 1024; 
	private static final int BUF_MSK = 0x3ff; 
 
	private int[] txBuf; 
	private int rdptTx, wrptTx; 
 
	DbgUdp() { 
		txBuf = new int[BUF_LEN];		// should be byte 
		rdptTx = wrptTx = 0; 
	} 
 
	void dbgWr(int c) { 
 
		if (((wrptTx+1)&BUF_MSK) == rdptTx) { 
			return;									// buffer full => drop value 
		} 
		txBuf[wrptTx] = c; 
		wrptTx = (wrptTx+1)&BUF_MSK; 
	} 
 
	/** 
	*	read out buffer and write it in udp packet. 
	*/ 
	int dbgReadBuffer(int[] udpBuf, int pos) { 
 
		int i, j, k; 
 
		j = 0; 
		k = pos; 
		for (i=0; rdptTx!=wrptTx; ++i) { 
			j <<= 8; 
			j += txBuf[rdptTx]; 
			rdptTx = (rdptTx+1) & BUF_MSK; 
			if ((i&3)==3) { 
				udpBuf[k] = j; 
				++k; 
			} 
		} 
		int cnt = i & 3; 
		if (cnt!=0) { 
			for (; cnt<4; ++cnt) { 
				j <<= 8; 
			} 
			udpBuf[k] = j; 
		} 
		return i; 
	}; 
}