//
// this method is blocking communocation
public int read() throws IOException {
try {
int ret = -1;
byte[] buffer = new byte[1];
boolean first = true;
do {
mFile.seek(mFilePointer);
ret = mFile.read(buffer);
if (mBlockOn == false || first == false || ret != 0) {
break;
}
first = false;
waitForUnreadable(TIMEOUT);
} while (true);
if (ret > 0) {
seek(mFilePointer + 1);
}
if (ret < 0) {
mIsEOF = true;
return -1;
}
if (ret == 0) {
return -2;
}
return 0xFF & buffer[0];
} catch (IOException e) {
mIsEOF = true;
throw e;
}
}
@Override
public int read(byte[] out, int start, int len) throws IOException {
try {
int ret = 0;
boolean first = true;
do {
mFile.seek(mFilePointer);
ret = mFile.read(out, start, len);
if (mBlockOn == false || first == false || ret != 0) {
break;
}
first = false;
waitForUnreadable(TIMEOUT);
} while (true);
if (ret > 0) {
mFilePointer += ret;
}
if (ret < 0) {
mIsEOF = true;
} else {
mIsEOF = false;
}
return ret;
} catch (IOException e) {
mIsEOF = true;
throw e;
}
}
@Override
public int waitForUnreadable(int timeout) throws IOException {
long len = this.length();
long fp = this.getFilePointer();
if (0 < (len - fp)) {
return 1;
} else {
return mFile.waitForUnreadable(timeout);
}
}
public void close() throws IOException {
if (mBaseFileIsClosedWhenCallClose) {
mFile.close();
}
}
public long length() throws IOException {
return mFile.length();
}