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[core] Add zero-allocation object_id methods (#12578)

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This commit is contained in:
J. Nick Koston
2025-12-22 07:56:33 -10:00
committed by GitHub
parent 265ad9d264
commit 6383fe4598
8 changed files with 70 additions and 58 deletions
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8
esphome/components/web_server/web_server.cpp
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@@ -404,9 +404,11 @@ void WebServer::handle_js_request(AsyncWebServerRequest *request) {
// Helper functions to reduce code size by avoiding macro expansion
static void set_json_id(JsonObject &root, EntityBase *obj, const char *prefix, JsonDetail start_config) {
char id_buf[160]; // object_id can be up to 128 chars + prefix + dash + null
const auto &object_id = obj->get_object_id();
snprintf(id_buf, sizeof(id_buf), "%s-%s", prefix, object_id.c_str());
char id_buf[160]; // prefix + dash + object_id (up to 128) + null
size_t len = strlen(prefix);
memcpy(id_buf, prefix, len); // NOLINT(bugprone-not-null-terminated-result) - null added by write_object_id_to
id_buf[len++] = '-';
obj->write_object_id_to(id_buf + len, sizeof(id_buf) - len);
root[ESPHOME_F("id")] = id_buf;
if (start_config == DETAIL_ALL) {
root[ESPHOME_F("name")] = obj->get_name();