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[api] Use memcpy for fixed32 decode on little-endian platforms (#15292)

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This commit is contained in:
J. Nick Koston
2026-03-31 07:43:18 -10:00
committed by GitHub
parent 9b97e95cf3
commit 2c9a3051d6
1 changed files with 7 additions and 1 deletions
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esphome/components/api/proto.cpp
+7 -1
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@@ -257,7 +257,13 @@ void ProtoDecodableMessage::decode(const uint8_t *buffer, size_t length) {
ESP_LOGV(TAG, "Out-of-bounds Fixed32-bit at offset %ld", (long) (ptr - buffer));
return;
}
uint32_t val = encode_uint32(ptr[3], ptr[2], ptr[1], ptr[0]);
uint32_t val;
#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
// Protobuf fixed32 is little-endian — direct load on LE platforms
memcpy(&val, ptr, 4);
#else
val = encode_uint32(ptr[3], ptr[2], ptr[1], ptr[0]);
#endif
if (!this->decode_32bit(field_id, Proto32Bit(val))) {
ESP_LOGV(TAG, "Cannot decode 32-bit field %" PRIu32 " with value %" PRIu32 "!", field_id, val);
}