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linetolinemap.py

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+import os
+import tempfile
+from typing import Optional
+
+from int2intmap import Int2IntMap
+
+
+class LineToLineMap:
+    def __init__(self):
+        (handle, self.tmpfilename) = tempfile.mkstemp()
+        os.close(handle)
+        self._int2intmap = Int2IntMap(self.tmpfilename)
+
+    def close(self):
+        self._int2intmap.close()
+        os.remove(self.tmpfilename)
+
+    def add_line(self, key_byte_start: int, value_byte_start):
+        self._int2intmap.add(key_byte_start, value_byte_start)
+
+    def get_line(self, key_byte_start: int) -> Optional[int]:
+        return self._int2intmap.find(key_byte_start)