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64 lines
1.8 KiB
C++
64 lines
1.8 KiB
C++
#include "json_util.h"
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#include "esphome/core/log.h"
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#ifdef USE_ESP8266
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#include <Esp.h>
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#endif
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#ifdef USE_ESP32
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#include <esp_heap_caps.h>
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#endif
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namespace esphome {
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namespace json {
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static const char *const TAG = "json";
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static std::vector<char> global_json_build_buffer; // NOLINT
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std::string build_json(const json_build_t &f) {
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// Here we are allocating as much heap memory as available minus 2kb to be safe
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// as we can not have a true dynamic sized document.
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// The excess memory is freed below with `shrinkToFit()`
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#ifdef USE_ESP8266
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const size_t free_heap = ESP.getMaxFreeBlockSize() - 2048; // NOLINT(readability-static-accessed-through-instance)
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#elif defined(USE_ESP32)
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const size_t free_heap = heap_caps_get_largest_free_block(MALLOC_CAP_DEFAULT) - 2048;
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#endif
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DynamicJsonDocument json_document(free_heap);
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JsonObject root = json_document.to<JsonObject>();
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f(root);
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json_document.shrinkToFit();
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std::string output;
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serializeJson(json_document, output);
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return output;
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}
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void parse_json(const std::string &data, const json_parse_t &f) {
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// Here we are allocating as much heap memory as available minus 2kb to be safe
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// as we can not have a true dynamic sized document.
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// The excess memory is freed below with `shrinkToFit()`
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#ifdef USE_ESP8266
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const size_t free_heap = ESP.getMaxFreeBlockSize() - 2048; // NOLINT(readability-static-accessed-through-instance)
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#elif defined(USE_ESP32)
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const size_t free_heap = heap_caps_get_largest_free_block(MALLOC_CAP_DEFAULT) - 2048;
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#endif
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DynamicJsonDocument json_document(free_heap);
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DeserializationError err = deserializeJson(json_document, data);
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json_document.shrinkToFit();
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JsonObject root = json_document.as<JsonObject>();
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if (err) {
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ESP_LOGW(TAG, "Parsing JSON failed.");
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return;
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}
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f(root);
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}
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} // namespace json
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} // namespace esphome
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