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components/nvs: add erase function

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This change exposes functions to erase single key and to erase all keys from namespace.
TW6769, TW6839
This commit is contained in:
Ivan Grokhotkov
2016-09-23 00:36:53 +08:00
parent e87d80d478
commit 2a68f60874
7 changed files with 125 additions and 30 deletions
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34
components/nvs_flash/src/nvs_storage.cpp
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@@ -69,6 +69,19 @@ esp_err_t Storage::init(uint32_t baseSector, uint32_t sectorCount)
return ESP_OK;
}
esp_err_t Storage::findItem(uint8_t nsIndex, ItemType datatype, const char* key, Page* &page, Item& item)
{
size_t itemIndex = 0;
for (auto it = std::begin(mPageManager); it != std::end(mPageManager); ++it) {
auto err = it->findItem(nsIndex, datatype, key, itemIndex, item);
if (err == ESP_OK) {
page = it;
return ESP_OK;
}
}
return ESP_ERR_NVS_NOT_FOUND;
}
esp_err_t Storage::writeItem(uint8_t nsIndex, ItemType datatype, const char* key, const void* data, size_t dataSize)
{
if (mState != StorageState::ACTIVE) {
@@ -202,6 +215,27 @@ esp_err_t Storage::eraseItem(uint8_t nsIndex, ItemType datatype, const char* key
return findPage->eraseItem(nsIndex, datatype, key);
}
esp_err_t Storage::eraseNamespace(uint8_t nsIndex)
{
if (mState != StorageState::ACTIVE) {
return ESP_ERR_NVS_NOT_INITIALIZED;
}
for (auto it = std::begin(mPageManager); it != std::end(mPageManager); ++it) {
while (true) {
auto err = it->eraseItem(nsIndex, ItemType::ANY, nullptr);
if (err == ESP_ERR_NVS_NOT_FOUND) {
break;
}
else if (err != ESP_OK) {
return err;
}
}
}
return ESP_OK;
}
esp_err_t Storage::getItemDataSize(uint8_t nsIndex, ItemType datatype, const char* key, size_t& dataSize)
{
if (mState != StorageState::ACTIVE) {