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fix: bug in host function return values #34

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Merged
chrisdickinson merged 1 commit into from
Jan 29, 2025
Merged

fix: bug in host function return values #34

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27 changes: 24 additions & 3 deletions extism/extism.py
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Original file line number Diff line number Diff line change
Expand Up @@ -327,13 +327,34 @@ def _map_ret(xs) -> List[Tuple[ValType, Callable[[Any, Any, Any], Any]]]:
]

if xs == int:
return [(ValType.I64, lambda _, slot, value: slot.assign(value))]
return [
(
ValType.I64,
lambda plugin, slot, value: plugin.return_bytes(
slot, value.to_bytes(length=8, byteorder="little")
),
)
]

if xs == float:
return [(ValType.F64, lambda _, slot, value: slot.assign(value))]
return [
(
ValType.F64,
lambda plugin, slot, value: plugin.return_bytes(
slot, value.to_bytes(length=8, byteorder="little")
),
)
]

if xs == bool:
return [(ValType.I32, lambda _, slot, value: slot.assign(value))]
return [
(
ValType.I32,
lambda plugin, slot, value: plugin.return_bytes(
slot, value.to_bytes(length=4, byteorder="little")
),
)
]

if get_origin(xs) == tuple:
return functools.reduce(lambda lhs, rhs: lhs + _map_ret(rhs), get_args(xs), [])
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