cpp-protobuf/

using namespace std ;
using namespace me :: eax :: examples :: game ;

void saveHero ( const char * fname, const Hero & hero ) {
fstream out ( fname, ios :: out | ios :: trunc | ios :: binary ) ;
if ( ! hero. SerializeToOstream ( & out ) )
throw runtime_error ( «saveHero() failed» ) ;
}

void loadHero ( const char * fname, Hero & hero ) {
fstream in ( fname, ios :: in | ios :: binary ) ;
if ( ! hero. ParseFromIstream ( & in ) )
throw runtime_error ( «loadHero() failed» ) ;
}

void printHero ( const Hero & hero ) {
cout << «Name: » << hero. name ( ) << endl ;
cout << «HP: » << hero. hp ( ) << endl ;
cout << «XP: » << hero. xp ( ) << endl ;

if ( hero. has_mage_info ( ) ) {
cout << «Class: mage» << endl ;
cout << «Spellbook: » ;
for ( int i = 0 ; i < hero. mage_info ( ) . spellbook_size ( ) ; i ++ ) {
switch ( hero. mage_info ( ) . spellbook ( i ) ) {
case Spell :: FIREBALL :
cout << «fireball, » ;
break ;
case Spell :: THUNDERBOLT :
cout << «thunderbolt, » ;
break ;
default :
cout << «(unknown spell), » ;
break ;
}
}
cout << endl ;
cout << «Mana: » << hero. mage_info ( ) . mana ( ) << endl ;
} else if ( hero. has_warrior_info ( ) ) {
cout << «Class: warrior» << endl ;
cout << «Weapon: » << (
hero. warrior_info ( ) . weapon ( ) == Weapon :: SWORD ? «sword» :
hero. warrior_info ( ) . weapon ( ) == Weapon :: BOW ? «bow» :
«(unknown weapon)»
) << endl ;
cout << «Arrows: » << hero. warrior_info ( ) . arrows_number ( )
<< endl ;
} else {
cout << «Class: (unknown class)» << endl ;
}

cout << endl ;
}

int main ( ) {
// Verify that the version of the library that we linked against is
// compatible with the version of the headers we compiled against.
GOOGLE_PROTOBUF_VERIFY_VERSION ;

Hero warrior ;
warrior. set_name ( «eax» ) ;
warrior. set_hp ( 50 ) ;
warrior. set_xp ( 256 ) ;
warrior. mutable_warrior_info ( ) — > set_weapon ( Weapon :: SWORD ) ;
warrior. mutable_warrior_info ( ) — > set_arrows_number ( 15 ) ;

Hero mage ;
mage. set_name ( «afiskon» ) ;
mage. set_hp ( 25 ) ;
mage. set_xp ( 1024 ) ;
mage. mutable_mage_info ( ) — > add_spellbook ( Spell :: FIREBALL ) ;
mage. mutable_mage_info ( ) — > add_spellbook ( Spell :: THUNDERBOLT ) ;
mage. mutable_mage_info ( ) — > set_mana ( 100 ) ;

cout << «Saving heroes…» << endl ;
saveHero ( «eax.dat» , warrior ) ;
saveHero ( «afiskon.dat» , mage ) ;

cout << «Loading heroes…» << endl ;
Hero warrior2 ;
Hero mage2 ;
loadHero ( «eax.dat» , warrior2 ) ;
loadHero ( «afiskon.dat» , mage2 ) ;

cout << endl ;
printHero ( warrior2 ) ;
printHero ( mage2 ) ;
}