| 144 | } |
| 145 | |
| 146 | int64_t BiDataSource::Seek(int64_t offset, int whence) |
| 147 | { |
| 148 | int64_t ret; |
| 149 | |
| 150 | if (mCurrent == nullptr) |
| 151 | return -EINVAL; |
| 152 | |
| 153 | if (whence == SEEK_SIZE) { |
| 154 | if (fileSize == 0) { |
| 155 | fileSize = getFileSize(); |
| 156 | } |
| 157 | return fileSize; |
| 158 | } else if ((whence == SEEK_CUR && offset == 0) || |
| 159 | (whence == SEEK_SET && offset == fileSize)) { |
| 160 | if (fileSize == 0) { |
| 161 | fileSize = getFileSize(); |
| 162 | } |
| 163 | return fileSize; |
| 164 | } else if ((fileSize <= 0 && whence == SEEK_END)) { |
| 165 | return FRAMEWORK_ERR(ENOSYS); |
| 166 | } |
| 167 | |
| 168 | if (whence == SEEK_CUR) { |
| 169 | offset += filePos; |
| 170 | } else if (whence == SEEK_END) { |
| 171 | if (fileSize == 0) { |
| 172 | fileSize = getFileSize(); |
| 173 | } |
| 174 | if (fileSize < 0) |
| 175 | return -EINVAL; |
| 176 | offset += fileSize; |
| 177 | } else if (whence != SEEK_SET) { |
| 178 | return FRAMEWORK_ERR(EINVAL); |
| 179 | } |
| 180 | |
| 181 | if (offset < 0) { |
| 182 | return -(EINVAL); |
| 183 | } |
| 184 | |
| 185 | if (offset == filePos) { |
| 186 | return offset; |
| 187 | } |
| 188 | |
| 189 | if (mSources.size() > 1) { |
| 190 | mCurrent = nullptr; |
| 191 | } |
| 192 | |
| 193 | if (mCurrent == nullptr) { // first try local |
| 194 | source *local = mSources[0]->mDataSource->getSpeedLevel() == speedLevel_local ? mSources[0].get() : mSources[1].get(); |
| 195 | if (local->mRange.end > offset) { |
| 196 | mCurrent = local; |
| 197 | } |
| 198 | } |
| 199 | if (mCurrent == nullptr) { //change current to remote |
| 200 | mCurrent = mSources[0]->mDataSource->getSpeedLevel() == speedLevel_remote ? mSources[0].get() : mSources[1].get(); |
| 201 | } |
| 202 | |
| 203 | if (!mCurrent->mIsOpened) { |
no test coverage detected