| 63 | |
| 64 | |
| 65 | uint32_t CompactDexFile::CalculateChecksum(const uint8_t* base_begin, |
| 66 | size_t base_size, |
| 67 | const uint8_t* data_begin, |
| 68 | size_t data_size) { |
| 69 | Header temp_header(*Header::At(base_begin)); |
| 70 | // Zero out fields that are not included in the sum. |
| 71 | temp_header.checksum_ = 0u; |
| 72 | temp_header.data_off_ = 0u; |
| 73 | temp_header.data_size_ = 0u; |
| 74 | uint32_t checksum = ChecksumMemoryRange(reinterpret_cast<const uint8_t*>(&temp_header), |
| 75 | sizeof(temp_header)); |
| 76 | // Exclude the header since we already computed it's checksum. |
| 77 | checksum = (checksum * 31) ^ ChecksumMemoryRange(base_begin + sizeof(temp_header), |
| 78 | base_size - sizeof(temp_header)); |
| 79 | checksum = (checksum * 31) ^ ChecksumMemoryRange(data_begin, data_size); |
| 80 | return checksum; |
| 81 | } |
| 82 | |
| 83 | uint32_t CompactDexFile::CalculateChecksum() const { |
| 84 | return CalculateChecksum(Begin(), Size(), DataBegin(), DataSize()); |
nothing calls this directly
no outgoing calls
no test coverage detected