/**
* Reads a zero-compressed encoded long from input buffer and returns it.
* @param buffer Binary array
* @param offset Offset into array at which vint begins.
* @return deserialized long from buffer.
*/
public static long readAsVLong(final byte [] buffer, final int offset) {
byte firstByte = buffer[offset];
int len = WritableUtils.decodeVIntSize(firstByte);
if (len == 1) {
return firstByte;
}
long i = 0;
for (int idx = 0; idx < len-1; idx++) {
byte b = buffer[offset + 1 + idx];
i = i << 8;
i = i | (b & 0xFF);
}
return (WritableUtils.isNegativeVInt(firstByte) ? ~i : i);
}
Bytes.java 文件源码
java
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