| 14 | } |
| 15 | |
| 16 | int64_t SourceReader::seek(int64_t offset, int whence) |
| 17 | { |
| 18 | switch (whence) { |
| 19 | case SEEK_SIZE: |
| 20 | return mSource->getFileSize(); |
| 21 | |
| 22 | case SEEK_SET: |
| 23 | if (offset >= 0) { |
| 24 | mPos = offset; |
| 25 | break; |
| 26 | } else { |
| 27 | return -EINVAL; |
| 28 | } |
| 29 | |
| 30 | case SEEK_END: |
| 31 | if (mSource->getFileSize() < 0) { |
| 32 | return -(ENOSYS); |
| 33 | } |
| 34 | |
| 35 | mPos = mSource->getFileSize() + offset; |
| 36 | break; |
| 37 | |
| 38 | case SEEK_CUR: |
| 39 | mPos += offset; |
| 40 | break; |
| 41 | |
| 42 | default: |
| 43 | return -EINVAL; |
| 44 | } |
| 45 | |
| 46 | return mPos; |
| 47 | } |
| 48 | |
| 49 | int SourceReader::read(void *buf, size_t nbyte) |
| 50 | { |