C++ (Cpp) unqlite_kv_fetch Examples

Example #1

File: edb.c Project: zhq324/openbmc

static int
edb_get(char *path, char *key, char *value) {
  int rc;
  unqlite *pDb;
  size_t nBytes;      //Data length
  char zBuf[MAX_BUF] = {0};

  while (1) {
    // Open our database;
    rc = unqlite_open(&pDb, path, UNQLITE_OPEN_READONLY|UNQLITE_OPEN_MMAP);
    if( rc != UNQLITE_OK ) {
      syslog(LOG_WARNING, "db_get: unqlite_open fails with rc: %d\n", rc);
      unqlite_close(pDb);
      return -1;
    }

    //Extract record content
    nBytes = MAX_BUF;
    memset(zBuf, 0, MAX_BUF);
    rc = unqlite_kv_fetch(pDb, key, -1, value, &nBytes);
    if( rc != UNQLITE_OK ){
      if (rc == UNQLITE_NOTFOUND) {
#ifdef DEBUG
        syslog(LOG_WARNING, "db_get: can not find the key\n");
#endif
        unqlite_close(pDb);
        return -1;
      } else {
#ifdef DEBUG
        syslog(LOG_WARNING, "db_get: unqlite_key_fetch returns %d\n", rc);
#endif
        /* Auto-commit the transaction and close our database */
        unqlite_close(pDb);
        continue;
      }
    } else {
      /* Auto-commit the transaction and close our database */
      unqlite_close(pDb);
      return 0;
    }
  }

  return 0;
}

Example #2

File: KVUnqlite.cpp Project: yulubupt/oss_core

bool KVUnqlite::get(const std::string& key, std::string& value)
{
  unqlite* pDbHandle = static_cast<unqlite*>(_pDbHandle);
  if (!pDbHandle)
  {
    return false;
  }

  char buff[PERSISTENT_STORE_MAX_VALUE_SIZE];

  unqlite_int64 nBytes = PERSISTENT_STORE_MAX_VALUE_SIZE;
  if (unqlite_kv_fetch(pDbHandle, key.c_str(),key.size(), buff, &nBytes) != UNQLITE_OK)
  {
    log_error();
    return false;
  }

  value = std::string(buff, nBytes);

  return true;
}