RandomAccessFile.seek0()

ExcerptRandomAccessFile.c

/*
From http://hg.openjdk.java.net/jdk8/jdk8/jdk/file/687fd7c7986d/src/share/native/java/io/RandomAccessFile.c#l126
*/
Java_java_io_RandomAccessFile_seek0(JNIEnv *env,
                    jobject this, jlong pos) {

    FD fd;

    fd = GET_FD(this, raf_fd);
    if (fd == -1) {
        JNU_ThrowIOException(env, "Stream Closed");
        return;
    }
    if (pos < jlong_zero) {
        JNU_ThrowIOException(env, "Negative seek offset");
    } else if (IO_Lseek(fd, pos, SEEK_SET) == -1) {
        JNU_ThrowIOExceptionWithLastError(env, "Seek failed");
    }
}