Continue decoding. @return -1 if stream is finished, or number of bytes available in read buffer (> 0)
()
| 66 | * @return -1 if stream is finished, or number of bytes available in read buffer (> 0) |
| 67 | */ |
| 68 | int decode() throws IOException { |
| 69 | while (true) { |
| 70 | if (buffer != null) { |
| 71 | if (!buffer.hasRemaining()) { |
| 72 | buffer = null; |
| 73 | } else { |
| 74 | return buffer.remaining(); |
| 75 | } |
| 76 | } |
| 77 | |
| 78 | switch (decoder.getStatus()) { |
| 79 | case DONE: |
| 80 | return -1; |
| 81 | |
| 82 | case OK: |
| 83 | decoder.push(0); |
| 84 | break; |
| 85 | |
| 86 | case NEEDS_MORE_INPUT: |
| 87 | // In "eager" more pulling preempts pushing. |
| 88 | if (eager && decoder.hasOutput()) { |
| 89 | buffer = decoder.pull(); |
| 90 | break; |
| 91 | } |
| 92 | ByteBuffer inputBuffer = decoder.getInputBuffer(); |
| 93 | ((Buffer) inputBuffer).clear(); |
| 94 | int bytesRead = source.read(inputBuffer); |
| 95 | if (bytesRead == -1) { |
| 96 | fail("unexpected end of input"); |
| 97 | } |
| 98 | if (bytesRead == 0) { |
| 99 | // No input data is currently available. |
| 100 | buffer = EMPTY_BUFFER; |
| 101 | return 0; |
| 102 | } |
| 103 | decoder.push(bytesRead); |
| 104 | break; |
| 105 | |
| 106 | case NEEDS_MORE_OUTPUT: |
| 107 | buffer = decoder.pull(); |
| 108 | break; |
| 109 | |
| 110 | default: |
| 111 | fail("corrupted input"); |
| 112 | } |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | void discard(int length) { |
| 117 | ((Buffer) buffer).position(buffer.position() + length); |