src/login.cc

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#include<my_lib/login.hh>

namespace my_lib {
        
        struct login_impl{
                private:
                const char * l;
                unsigned long long hash;
                
                static unsigned long long get_hash(const char* s){
                        unsigned long long l=0;
                        char * c=(char*)&l;
                        for(;*s!=0;s++)
                                for(int i=0;i<sizeof(l);i++)
                                        c[i]^=(*s>>i)|(*s<<(8-i));
                        return l;
                }
                
                        login_impl(const char* login, const char* passwd) :
                            l(login), hash(get_hash(passwd)) {}
                        const char* login(){
                                return l;
                        }
                        void chg_passwd(const char* passwd){
                                hash=get_hash(passwd);
                        }
                        unsigned long long get_passwd_hash(){
                                return hash;
                        }
                        
                        friend struct login_t;
        };
        
                        login_t::login_t(const char* login, const char* passwd):
                           implementation(new login_impl(login,passwd)) {}
                        const char* login_t::login(){
                                return implementation->login();
                        }
                        void login_t::chg_passwd(const char* passwd){
                                implementation->chg_passwd(passwd);
                        }
                        unsigned long long login_t::get_hash(const char* s){
                                return login_impl::get_hash(s);
                        }
                        unsigned long long login_t::get_passwd_hash(){
                                return implementation->get_passwd_hash();
                        }

}