Advance to next address range
(&mut self)
| 49 | |
| 50 | /// Advance to next address range |
| 51 | fn advance(&mut self) -> bool { |
| 52 | if self.reader.at_end() { |
| 53 | return false; |
| 54 | } |
| 55 | |
| 56 | let first_byte = match self.reader.read_byte() { |
| 57 | Some(b) => b, |
| 58 | None => return false, |
| 59 | }; |
| 60 | |
| 61 | if (first_byte & 0x80) == 0 { |
| 62 | return false; // Invalid linetable |
| 63 | } |
| 64 | |
| 65 | let code = (first_byte >> 3) & 0x0f; |
| 66 | let length = ((first_byte & 0x07) + 1) as i32; |
| 67 | |
| 68 | // Get line delta for this entry |
| 69 | let line_delta = self.get_line_delta(code); |
| 70 | |
| 71 | // Update computed line |
| 72 | self.computed_line += line_delta; |
| 73 | |
| 74 | // Check for NO_LINE marker |
| 75 | if Self::is_no_line_marker(first_byte) { |
| 76 | self.ar_line = -1; |
| 77 | } else { |
| 78 | self.ar_line = self.computed_line; |
| 79 | } |
| 80 | |
| 81 | // Update address range |
| 82 | self.ar_start = self.ar_end; |
| 83 | self.ar_end += length * 2; // sizeof(_Py_CODEUNIT) = 2 |
| 84 | |
| 85 | // Skip remaining bytes for this entry |
| 86 | while !self.reader.at_end() { |
| 87 | if let Some(b) = self.reader.peek_byte() { |
| 88 | if (b & 0x80) != 0 { |
| 89 | break; |
| 90 | } |
| 91 | self.reader.read_byte(); |
| 92 | } else { |
| 93 | break; |
| 94 | } |
| 95 | } |
| 96 | |
| 97 | true |
| 98 | } |
| 99 | |
| 100 | fn get_line_delta(&mut self, code: u8) -> i32 { |
| 101 | let kind = match PyCodeLocationInfoKind::from_code(code) { |
no test coverage detected