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76 lines
2.5 KiB
C++
76 lines
2.5 KiB
C++
#include "json_util.h"
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#include "esphome/core/log.h"
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// ArduinoJson::Allocator is included via ArduinoJson.h in json_util.h
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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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#ifdef USE_PSRAM
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// Global allocator that outlives all JsonDocuments returned by parse_json()
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// This prevents dangling pointer issues when JsonDocuments are returned from functions
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// NOLINTNEXTLINE(cppcoreguidelines-avoid-non-const-global-variables) - Must be mutable for ArduinoJson::Allocator
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static SpiRamAllocator global_json_allocator;
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#endif
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std::string build_json(const json_build_t &f) {
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// NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
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JsonBuilder builder;
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JsonObject root = builder.root();
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f(root);
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return builder.serialize();
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// NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
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}
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bool parse_json(const std::string &data, const json_parse_t &f) {
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// NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
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JsonDocument doc = parse_json(reinterpret_cast<const uint8_t *>(data.c_str()), data.size());
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if (doc.overflowed() || doc.isNull())
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return false;
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return f(doc.as<JsonObject>());
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// NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
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}
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JsonDocument parse_json(const uint8_t *data, size_t len) {
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// NOLINTBEGIN(clang-analyzer-cplusplus.NewDeleteLeaks) false positive with ArduinoJson
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if (data == nullptr || len == 0) {
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ESP_LOGE(TAG, "No data to parse");
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return JsonObject(); // return unbound object
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}
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#ifdef USE_PSRAM
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JsonDocument json_document(&global_json_allocator);
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#else
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JsonDocument json_document;
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#endif
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if (json_document.overflowed()) {
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ESP_LOGE(TAG, "Could not allocate memory for JSON document!");
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return JsonObject(); // return unbound object
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}
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DeserializationError err = deserializeJson(json_document, data, len);
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if (err == DeserializationError::Ok) {
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return json_document;
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} else if (err == DeserializationError::NoMemory) {
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ESP_LOGE(TAG, "Can not allocate more memory for deserialization. Consider making source string smaller");
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return JsonObject(); // return unbound object
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}
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ESP_LOGE(TAG, "Parse error: %s", err.c_str());
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return JsonObject(); // return unbound object
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// NOLINTEND(clang-analyzer-cplusplus.NewDeleteLeaks)
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}
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std::string JsonBuilder::serialize() {
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if (doc_.overflowed()) {
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ESP_LOGE(TAG, "JSON document overflow");
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return "{}";
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}
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std::string output;
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serializeJson(doc_, output);
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return output;
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}
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} // namespace json
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} // namespace esphome
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