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[api] Implement zero-copy for all protobuf bytes fields (#9761)

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This commit is contained in:
J. Nick Koston
2025-07-21 11:38:39 -10:00
committed by GitHub
parent 74ce3d2c0b
commit db62a94712
9 changed files with 154 additions and 108 deletions
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32
esphome/components/api/proto.h
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@@ -527,25 +527,6 @@ class ProtoSize {
total_size += field_id_size + 1;
}
/**
* @brief Calculates and adds the size of a fixed field to the total message size
*
* Fixed fields always take exactly N bytes (4 for fixed32/float, 8 for fixed64/double).
*
* @tparam NumBytes The number of bytes for this fixed field (4 or 8)
* @param is_nonzero Whether the value is non-zero
*/
template<uint32_t NumBytes>
static inline void add_fixed_field(uint32_t &total_size, uint32_t field_id_size, bool is_nonzero) {
// Skip calculation if value is zero
if (!is_nonzero) {
return; // No need to update total_size
}
// Fixed fields always take exactly NumBytes
total_size += field_id_size + NumBytes;
}
/**
* @brief Calculates and adds the size of a float field to the total message size
*/
@@ -704,6 +685,19 @@ class ProtoSize {
total_size += field_id_size + varint(str_size) + str_size;
}
/**
* @brief Calculates and adds the size of a bytes field to the total message size
*/
static inline void add_bytes_field(uint32_t &total_size, uint32_t field_id_size, size_t len) {
// Skip calculation if bytes is empty
if (len == 0) {
return; // No need to update total_size
}
// Field ID + length varint + data bytes
total_size += field_id_size + varint(static_cast<uint32_t>(len)) + static_cast<uint32_t>(len);
}
/**
* @brief Calculates and adds the size of a nested message field to the total message size
*