SlotFunctions.hpp

00001 // ArduinoJson - arduinojson.org
00002 // Copyright Benoit Blanchon 2014-2021
00003 // MIT License
00004 
00005 #pragma once
00006 
00007 #include <ArduinoJson/Polyfills/assert.hpp>
00008 #include <ArduinoJson/Variant/VariantData.hpp>
00009 
00010 namespace ARDUINOJSON_NAMESPACE {
00011 
00012 template <typename TAdaptedString>
00013 inline bool slotSetKey(VariantSlot* var, TAdaptedString key, MemoryPool* pool) {
00014   if (!var)
00015     return false;
00016   return slotSetKey(var, key, pool, typename TAdaptedString::storage_policy());
00017 }
00018 
00019 template <typename TAdaptedString>
00020 inline bool slotSetKey(VariantSlot* var, TAdaptedString key, MemoryPool* pool,
00021                        storage_policies::decide_at_runtime) {
00022   if (key.isStatic()) {
00023     return slotSetKey(var, key, pool, storage_policies::store_by_address());
00024   } else {
00025     return slotSetKey(var, key, pool, storage_policies::store_by_copy());
00026   }
00027 }
00028 
00029 template <typename TAdaptedString>
00030 inline bool slotSetKey(VariantSlot* var, TAdaptedString key, MemoryPool*,
00031                        storage_policies::store_by_address) {
00032   ARDUINOJSON_ASSERT(var);
00033   var->setKey(key.data(), storage_policies::store_by_address());
00034   return true;
00035 }
00036 
00037 template <typename TAdaptedString>
00038 inline bool slotSetKey(VariantSlot* var, TAdaptedString key, MemoryPool* pool,
00039                        storage_policies::store_by_copy) {
00040   const char* dup = pool->saveString(key);
00041   if (!dup)
00042     return false;
00043   ARDUINOJSON_ASSERT(var);
00044   var->setKey(dup, storage_policies::store_by_copy());
00045   return true;
00046 }
00047 
00048 inline size_t slotSize(const VariantSlot* var) {
00049   size_t n = 0;
00050   while (var) {
00051     n++;
00052     var = var->next();
00053   }
00054   return n;
00055 }
00056 
00057 inline VariantData* slotData(VariantSlot* slot) {
00058   return reinterpret_cast<VariantData*>(slot);
00059 }
00060 }  // namespace ARDUINOJSON_NAMESPACE