[SOLVED] CS计算机代考程序代写 compiler #include

#include
#include
#include
#include
#include
#include
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#include
#include

#include “../common/contextmanager.h”
#include “../common/err.h”
#include “../common/protocol.h”

#include “authtableentry.h”
#include “concurrenthashtable.h”
#include “format.h”
#include “storage.h”

using namespace std;

/// Append a salt to a password, hash it, and return the result
///
/// @param pass The plain-text password to hash
/// @param salt The salt to use with the password
///
/// @return The hash of the salted password
bytevec hash_pass(string pass, bytevec salt) {
cout << “hash_pass is not implemented” << endl;return {};}/// Storage::Internal is the private struct that holds all of the fields of the/// Storage object.Organizing the fields as an Internal is part of the PIMPL/// pattern.struct Storage::Internal {/// The map of authentication information, indexed by usernameConcurrentHashTable auth_table;

/// The map of key/value pairs
ConcurrentHashTable kv_store;

/// The name of the file from which the Storage object was loaded, and to
/// which we persist the Storage object every time it changes
string filename = “”;

/// Construct the Storage::Internal object by setting the filename and bucket
/// count
///
/// @param fname The name of the file to use for persistence
/// @param buckets The number of buckets in the hash table
Internal(string fname, size_t buckets)
: auth_table(buckets), kv_store(buckets), filename(fname) {}
};

/// Construct an empty object and specify the file from which it should be
/// loaded.To avoid exceptions and errors in the constructor, the act of
/// loading data is separate from construction.
///
/// @param fname The name of the file to use for persistence
/// @param buckets The number of buckets in the hash table
Storage::Storage(const string &fname, size_t num_buckets)
: fields(new Internal(fname, num_buckets)) {
cout << “Storage constructor is not implemented” << endl;}/// Destructor for the storage object.////// NB: The compiler doesn’t know that it can create the default destructor in/// the .h file, because PIMPL prevents it from knowing the size of/// Storage::Internal.Now that we have reified Storage::Internal, the/// compiler can make a destructor for us.Storage::~Storage() = default;/// Create a new entry in the Auth table.If the user already exists, return an/// error.Otherwise, create a salt, hash the password, and then save an entry/// with the username, salt, hashed password, and a zero-byte content.////// @param user The user name to register/// @param pass The password to associate with that user name////// @return A result tuple, as described in storage.hStorage::result_t Storage::add_user(const string &user, const string &pass) {cout << “add_user is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};}/// Set the data bytes for a user, but do so if and only if the password/// matches////// @param userThe name of the user whose content is being set/// @param passThe password for the user, used to authenticate/// @param content The data to set for this user////// @return A result tuple, as described in storage.hStorage::result_t Storage::set_user_data(const string &user, const string &pass, const bytevec &content) {cout << “set_user_data is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};}/// Return a copy of the user data for a user, but do so only if the password/// matches////// @param user The name of the user who made the request/// @param pass The password for the user, used to authenticate/// @param whoThe name of the user whose content is being fetched////// @return A result tuple, as described in storage.h.Note that “no data” is/// an errorStorage::result_t Storage::get_user_data(const string &user, const string &pass, const string &who) {cout << “get_user_data is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};}/// Return a newline-delimited string containing all of the usernames in the/// auth table////// @param user The name of the user who made the request/// @param pass The password for the user, used to authenticate////// @return A result tuple, as described in storage.hStorage::result_t Storage::get_all_users(const string &user, const string &pass) {cout << “get_all_users is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};}/// Authenticate a user////// @param user The name of the user who made the request/// @param pass The password for the user, used to authenticate////// @return A result tuple, as described in storage.hStorage::result_t Storage::auth(const string &user, const string &pass) {cout << “auth is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};}/// Create a new key/value mapping in the table////// @param user The name of the user who made the request/// @param pass The password for the user, used to authenticate/// @param keyThe key whose mapping is being created/// @param valThe value to copy into the map////// @return A result tuple, as described in storage.hStorage::result_t Storage::kv_insert(const string &user, const string &pass, const string &key, const bytevec &val) {cout << “kv_insert is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};};/// Get a copy of the value to which a key is mapped////// @param user The name of the user who made the request/// @param pass The password for the user, used to authenticate/// @param keyThe key whose value is being fetched////// @return A result tuple, as described in storage.hStorage::result_t Storage::kv_get(const string &user, const string &pass,const string &key) {cout << “kv_get is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};};/// Delete a key/value mapping////// @param user The name of the user who made the request/// @param pass The password for the user, used to authenticate/// @param keyThe key whose value is being deleted////// @return A result tuple, as described in storage.hStorage::result_t Storage::kv_delete(const string &user, const string &pass, const string &key) {cout << “kv_delete is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};};/// Insert or update, so that the given key is mapped to the give value////// @param user The name of the user who made the request/// @param pass The password for the user, used to authenticate/// @param keyThe key whose mapping is being upserted/// @param valThe value to copy into the map////// @return A result tuple, as described in storage.h.Note that there are two/// “OK” messages, depending on whether we get an insert or an update.Storage::result_t Storage::kv_upsert(const string &user, const string &pass, const string &key, const bytevec &val) {cout << “kv_upsert is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};};/// Return all of the keys in the kv_store, as a ”
“-delimited string////// @param user The name of the user who made the request/// @param pass The password for the user, used to authenticate////// @return A result tuple, as described in storage.hStorage::result_t Storage::kv_all(const string &user, const string &pass) {cout << “kv_all is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};};/// Shut down the storage when the server stops.This method needs to close/// any open files related to incremental persistence.It also needs to clean/// up any state related to .so files.This is only called when all threads/// have stopped accessing the Storage object.void Storage::shutdown() { cout << “shutdown is not implemented” << endl; }/// Write the entire Storage object to the file specified by this.filename. To/// ensure durability, Storage must be persisted in two steps.First, it must/// be written to a temporary file (this.filename.tmp).Then the temporary file/// can be renamed to replace the older version of the Storage object.////// @return A result tuple, as described in storage.hStorage::result_t Storage::save_file() {cout << “save_file is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};}/// Populate the Storage object by loading this.filename.Note that load()/// begins by clearing the maps, so that when the call is complete, exactly and/// only the contents of the file are in the Storage object.////// @return A result tuple, as described in storage.h.Note that a non-existent/// file is not an error.Storage::result_t Storage::load_file() {cout << “load_file is not implemented” << endl;return {false, RES_ERR_UNIMPLEMENTED};}