Use half-open intervals for time ranges

src/rosbags/rosbag1/reader.py

@@ -94,7 +94,7 @@ class Chunk(NamedTuple):
 class TopicInfo(NamedTuple):
     """Topic information."""
 
-    conn_count: int
+    conncount: int
     msgcount: int
     msgdef: str
     msgtype: str
@@ -472,7 +472,7 @@ class Reader:
 
     @property
     def end_time(self) -> int:
-        """Timestamp in nanoseconds of the latest message."""
+        """Timestamp in nanoseconds after the latest message."""
         return max(x.end_time for x in self.chunk_infos)
 
     @property
@@ -517,7 +517,7 @@ class Reader:
 
         chunk_pos = header.get_uint64('chunk_pos')
         start_time = header.get_time('start_time')
-        end_time = header.get_time('end_time')
+        end_time = header.get_time('end_time') + 1
         count = header.get_uint32('count')
 
         self.bio.seek(4, os.SEEK_CUR)

src/rosbags/rosbag2/reader.py

@@ -121,7 +121,7 @@ class Reader:
     @property
     def duration(self) -> int:
         """Duration in nanoseconds between earliest and latest messages."""
-        return self.metadata['duration']['nanoseconds']
+        return self.metadata['duration']['nanoseconds'] + 1
 
     @property
     def start_time(self) -> int:
@@ -130,7 +130,7 @@ class Reader:
 
     @property
     def end_time(self) -> int:
-        """Timestamp in nanoseconds of the latest message."""
+        """Timestamp in nanoseconds after the latest message."""
         return self.start_time + self.duration
 
     @property

src/rosbags/rosbag2/writer.py

@@ -185,7 +185,7 @@ class Writer:  # pylint: disable=too-many-instance-attributes
         self.cursor = None
 
         duration, start, count = self.conn.execute(
-            'SELECT max(timestamp) - min(timestamp) + 1, min(timestamp), count(*) FROM messages',
+            'SELECT max(timestamp) - min(timestamp), min(timestamp), count(*) FROM messages',
         ).fetchone()
 
         self.conn.commit()