/**
* Perform a low-level read of the specified number of bytes into the specified byte list. The
* incoming bytes will be appended to the byte list. This is equivalent to the read(2) POSIX
* function, and like that function it ignores read and write buffers defined elsewhere.
*
* @param number the number of bytes to read
* @param byteList the byte list on which to append the incoming bytes
* @return the number of bytes actually read
* @throws java.io.IOException if there is an exception during IO
* @throws org.jruby.util.io.BadDescriptorException if the associated channel is already closed.
* @see org.jruby.util.ByteList
*/
public int read(int number, ByteList byteList) throws IOException, BadDescriptorException {
checkOpen();
byteList.ensure(byteList.length() + number);
int bytesRead =
read(
ByteBuffer.wrap(
byteList.getUnsafeBytes(), byteList.begin() + byteList.length(), number));
if (bytesRead > 0) {
byteList.length(byteList.length() + bytesRead);
}
return bytesRead;
}
/**
* Copies bytes from the channel buffer into a destination <tt>ByteBuffer</tt>
*
* @param dst A <tt>ByteList</tt> to place the data in.
* @param len The maximum number of bytes to copy.
* @return The number of bytes copied.
*/
private final int copyBufferedBytes(ByteList dst, int len) {
int bytesCopied = 0;
dst.ensure(Math.min(len, bufferedInputBytesRemaining()));
if (bytesCopied < len && ungotc != -1) {
++bytesCopied;
dst.append((byte) ungotc);
ungotc = -1;
}
//
// Copy out any buffered bytes
//
if (bytesCopied < len && buffer.hasRemaining()) {
int n = Math.min(buffer.remaining(), len - bytesCopied);
dst.append(buffer, n);
bytesCopied += n;
}
return bytesCopied;
}
@JRubyMethod(required = 2, optional = 4)
public IRubyObject primitive_convert(ThreadContext context, IRubyObject[] args) {
Ruby runtime = context.runtime;
RubyString input;
RubyString output;
int outputByteoffset = -1;
int outputBytesize = 0;
int flags = 0;
int hashArg = -1;
if (args.length > 2 && !args[2].isNil()) {
if (args.length == 3 && args[2] instanceof RubyHash) {
hashArg = 2;
} else {
outputByteoffset = (int) args[2].convertToInteger().getLongValue();
if (outputByteoffset < 0) throw runtime.newArgumentError("negative offset");
}
}
if (args.length > 3 && !args[3].isNil()) {
if (args.length == 4 && args[3] instanceof RubyHash) {
hashArg = 3;
} else {
outputBytesize = (int) args[3].convertToInteger().getLongValue();
if (outputBytesize < 0) throw runtime.newArgumentError("negative bytesize");
}
}
if (args.length > 4 && !args[4].isNil()) {
if (args.length > 5 && !args[5].isNil()) {
throw runtime.newArgumentError(args.length, 5);
}
if (args[4] instanceof RubyHash) {
hashArg = 4;
} else {
flags = (int) args[4].convertToInteger().getLongValue();
}
}
IRubyObject opt = context.nil;
if (hashArg != -1 && !(opt = TypeConverter.checkHashType(runtime, args[hashArg])).isNil()) {
IRubyObject v = ((RubyHash) opt).op_aref(context, runtime.newSymbol("partial_input"));
if (v.isTrue()) {
flags |= EncodingUtils.ECONV_PARTIAL_INPUT;
}
v = ((RubyHash) opt).op_aref(context, runtime.newSymbol("after_output"));
if (v.isTrue()) {
flags |= EncodingUtils.ECONV_AFTER_OUTPUT;
}
} else {
flags = 0;
}
ByteList inBytes;
ByteList outBytes;
if (args[0].isNil()) {
inBytes = new ByteList();
} else {
input = args[0].convertToString();
input.modify19();
inBytes = input.getByteList();
}
output = args[1].convertToString();
output.modify19();
outBytes = output.getByteList();
if (outputByteoffset == -1) {
outputByteoffset = outBytes.getRealSize();
} else if (outputByteoffset > outBytes.getRealSize()) {
throw runtime.newArgumentError("offset too big");
}
int outputByteEnd = outputByteoffset + outputBytesize;
if (outputByteEnd > outBytes.getRealSize()) {
outBytes.ensure(outputByteEnd);
}
RubyCoderResult result =
transcoder.primitiveConvert(
context,
inBytes,
output.getByteList(),
outputByteoffset,
outputBytesize,
inBytes.getEncoding(),
inBytes.getEncoding().isAsciiCompatible(),
flags);
outBytes.setEncoding(
transcoder.outEncoding != null ? transcoder.outEncoding : inBytes.getEncoding());
return symbolFromResult(result, runtime, flags, context);
}