The Annoyance Filter.pdf - Fourmilab

§37 ANNOYANCE-FILTER FAST DICTIONARY 41
37. Add a new word to the word vector. As this is a new word, we know that its forward link is
fastDictionaryVoidLink . The balance of the fields are transcribed from the dictionaryWord we’re
adding.
〈 Add new word to word table 37 〉 ≡
vector〈unsigned char〉::size type wl = words .size ( );
words .resize (words .size ( ) + sizeof (u int32 t ) + sizeof (double) + sizeof
(u int16 t ) + w ⃗ second .get ( ).length ( ));
u int32 t vl = fastDictionaryVoidLink ;
#ifdef OLDWAY
memcpy (words .begin ( ) + wl , &vl , sizeof vl );
#else
Vmemcpy (words , wl , &vl , sizeof vl );
#endif
wl += sizeof vl ;
double jp = w ⃗ second .getJunkProbability ( );
#ifdef OLDWAY
memcpy (words .begin ( ) + wl , &jp, sizeof jp);
#else
Vmemcpy (words , wl , &jp, sizeof jp);
#endif
wl += sizeof jp;
u int16 t wlen = w ⃗ second .get ( ).length ( );
#ifdef OLDWAY
memcpy (words .begin ( ) + wl , &wlen , sizeof wlen );
#else
Vmemcpy (words , wl , &wlen , sizeof wlen );
#endif
wl += sizeof wlen ;
#ifdef OLDWAY
memcpy (words .begin ( ) + wl , w ⃗ second .get ( ).data ( ), wlen );
#else
Vmemcpy (words , wl , w ⃗ second .get ( ).data ( ), wlen );
#endif
This code is used in section 35.