preferences.h

Go to the documentation of this file.

#pragma once
#ifdef USE_HOST
 
#include "esphome/core/preference_backend.h"
#include <cstring>
#include <map>
#include <string>
#include <vector>
 
namespace esphome::host {
 
class HostPreferences final : public PreferencesMixin<HostPreferences> {
 public:
  using PreferencesMixin<HostPreferences>::make_preference;
  bool sync();
  bool reset();
 
  ESPPreferenceObject make_preference(size_t length, uint32_t type, bool in_flash);
  ESPPreferenceObject make_preference(size_t length, uint32_t type) { return make_preference(length, type, false); }
 
  bool save(uint32_t key, const uint8_t *data, size_t len) {
    if (len > 255)
      return false;
    this->setup_();
    std::vector vec(data, data + len);
    this->data_[key] = vec;
    return true;
  }
 
  bool load(uint32_t key, uint8_t *data, size_t len) {
    if (len > 255)
      return false;
    this->setup_();
    auto it = this->data_.find(key);
    if (it == this->data_.end())
      return false;
    const auto &vec = it->second;
    if (vec.size() != len)
      return false;
    memcpy(data, vec.data(), len);
    return true;
  }
 
 protected:
  void setup_();
  bool setup_complete_{};
  std::string filename_{};
  std::map<uint32_t, std::vector<uint8_t>> data_{};
};
 
void setup_preferences();
extern HostPreferences *host_preferences;  // NOLINT(cppcoreguidelines-avoid-non-const-global-variables)
 
}  // namespace esphome::host
 
DECLARE_PREFERENCE_ALIASES(esphome::host::HostPreferences)
 
#endif  // USE_HOST