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J. Nick Koston
edb2145aca
Reorder FieldFlags so the eight [0.0, 1.0]-clamped float fields occupy bits 0-7 in the same order as they appear in LightCall and LightColorValues, and move color_temperature_ to the end of both structs. Under that layout the LightCall offset for clamp field i is `offsetof(LightCall, brightness_) + i * 4`, and the LightColorValues offset is exactly 12 bytes lower for every field. validate_() now iterates the active clamp bits in a small loop that computes these offsets from the bit position instead of expanding eight nearly identical inline blocks via macro. The field-name PROGMEM pointer is passed to clamp_and_log_if_invalid as `const LogString *const *`; progmem_read_ptr only runs on the cold (out-of-range) path, so the hot path performs no flash reads for the name. The eight invariants the loop relies on (flag-bit layout, field contiguity, and the constant 12-byte delta) are enforced by static_asserts so any future reshuffle fails loudly at compile time. Size deltas for the isolated light component build (vs dev): ESP32-IDF: -118 B code, +32 B PROGMEM name table = -86 B net ESP8266: -56 B code, +32 B PROGMEM name table = -24 B net 0 B RAM impact on both targets.
