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Fix serialization of empty message sequences

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This commit is contained in:
Marko Durkovic
2022-05-04 17:40:50 +02:00
parent c2e676a01f
commit 9f3da0c2be
2 changed files with 21 additions and 8 deletions
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src/rosbags/serde/cdr.py
+4 -2
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@@ -133,7 +133,8 @@ def generate_getsize_cdr(fields: list[Field]) -> tuple[CDRSerSize, int]:
lines.append(f' val = message.{fieldname}')
if subdesc.args.size_cdr:
if aligned < anext_before <= anext_after:
lines.append(f' pos = (pos + {anext_before} - 1) & -{anext_before}')
lines.append(' if len(val):')
lines.append(f' pos = (pos + {anext_before} - 1) & -{anext_before}')
lines.append(' for _ in val:')
if anext_before > anext_after:
lines.append(f' pos = (pos + {anext_before} - 1) & -{anext_before}')
@@ -144,7 +145,8 @@ def generate_getsize_cdr(fields: list[Field]) -> tuple[CDRSerSize, int]:
f' func = get_msgdef("{subdesc.args.name}", typestore).getsize_cdr',
)
if aligned < anext_before <= anext_after:
lines.append(f' pos = (pos + {anext_before} - 1) & -{anext_before}')
lines.append(' if len(val):')
lines.append(f' pos = (pos + {anext_before} - 1) & -{anext_before}')
lines.append(' for item in val:')
if anext_before > anext_after:
lines.append(f' pos = (pos + {anext_before} - 1) & -{anext_before}')