| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "Reader.h" |
| |
| #include <decaf/lang/Math.h> |
| #include <decaf/nio/CharBuffer.h> |
| |
| #include <vector> |
| |
| using namespace std; |
| using namespace decaf; |
| using namespace decaf::io; |
| using namespace decaf::lang; |
| using namespace decaf::lang::exceptions; |
| using namespace decaf::nio; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| Reader::Reader() { |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| Reader::~Reader() { |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void Reader::mark(int readAheadLimit DECAF_UNUSED) { |
| throw IOException(__FILE__, __LINE__, "Default implementation of Reader, mark not supported."); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| bool Reader::ready() const { |
| return false; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| void Reader::reset() { |
| throw IOException(__FILE__, __LINE__, "Default implementation of Reader, reset not supported."); |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| long long Reader::skip(long long count) { |
| |
| try { |
| |
| long long skipped = 0; |
| int toRead = count < 512 ? (int) count : 512; |
| |
| std::vector<char> charsSkipped(toRead); |
| |
| while (skipped < count) { |
| |
| int read = this->doReadArrayBounded(&charsSkipped[0], (int) charsSkipped.size(), 0, toRead); |
| |
| if (read == -1) { |
| return skipped; |
| } |
| |
| skipped += read; |
| |
| if (read < toRead) { |
| return skipped; |
| } |
| |
| if (count - skipped < (long long) toRead) { |
| toRead = (int) (count - skipped); |
| } |
| } |
| |
| return skipped; |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| int Reader::read(std::vector<char>& buffer) { |
| |
| try { |
| return this->doReadVector(buffer); |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| int Reader::read(char* buffer, int length) { |
| |
| try { |
| return this->doReadArray(buffer, length); |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| int Reader::read(char* buffer, int size, int offset, int length) { |
| |
| try { |
| return this->doReadArrayBounded(buffer, size, offset, length); |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| int Reader::read() { |
| |
| try { |
| return this->doReadChar(); |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| int Reader::read(decaf::nio::CharBuffer* charBuffer) { |
| |
| try { |
| // Error checking is done in the Impl. |
| return this->doReadCharBuffer(charBuffer); |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCH_RETHROW(NullPointerException) |
| DECAF_CATCH_RETHROW(ReadOnlyBufferException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| int Reader::doReadVector(std::vector<char>& buffer) { |
| |
| try { |
| |
| if (buffer.size() == 0) { |
| return -1; |
| } |
| |
| return this->doReadArrayBounded(&buffer[0], (int) buffer.size(), 0, (int) buffer.size()); |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| int Reader::doReadArray(char* buffer, int length) { |
| |
| try { |
| |
| if (length == 0) { |
| return 0; |
| } |
| |
| return this->doReadArrayBounded(buffer, length, 0, length); |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| int Reader::doReadChar() { |
| |
| try { |
| |
| char buffer; |
| |
| if (this->doReadArrayBounded(&buffer, 1, 0, 1) == -1) { |
| return -1; |
| } |
| |
| return buffer; |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| int Reader::doReadCharBuffer(decaf::nio::CharBuffer* charBuffer) { |
| |
| if (charBuffer == NULL) { |
| throw NullPointerException(__FILE__, __LINE__, "Pointer to CharBuffer cannot be NULL."); |
| } |
| |
| try { |
| |
| if (charBuffer->length() == 0) { |
| return 0; |
| } |
| |
| int length = (int) charBuffer->length(); |
| |
| std::vector<char> buffer(length); |
| |
| length = Math::min(length, this->doReadVector(buffer)); |
| |
| if (length > 0) { |
| charBuffer->put(&buffer[0], (int) buffer.size(), 0, length); |
| } |
| |
| return length; |
| } |
| DECAF_CATCH_RETHROW(IOException) |
| DECAF_CATCH_RETHROW(NullPointerException) |
| DECAF_CATCH_RETHROW(ReadOnlyBufferException) |
| DECAF_CATCHALL_THROW(IOException) |
| } |