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[json] Make heap fallback max size constexpr

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J. Nick Koston
2026-02-18 17:53:29 -06:00
parent 1ba1ab7fe2
commit bb6600985f
1 changed files with 2 additions and 1 deletions
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esphome/components/json/json_util.cpp
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@@ -123,8 +123,9 @@ SerializationBuffer<> JsonBuilder::serialize() {
// In practice, one iteration (1024 bytes) covers all known entity types.
// Payloads exceeding 1024 bytes are not known to exist in real configurations.
// Cap at 4096 as a safety limit to prevent runaway allocation.
constexpr size_t max_heap_size = 4096;
size_t heap_size = buf_size * 2;
while (heap_size <= 4096) {
while (heap_size <= max_heap_size) {
result.reallocate_heap_(heap_size - 1);
size = serializeJson(doc_, result.data_writable_(), heap_size);
if (size < heap_size) {