if ((bits->bytePtr<<3)+bits->bitPtr+n>bits->nbBits) bits->overflow=1; if (bits->overflow) return;
void speex_bits_advance(SpeexBits *bits, int n){   int nbytes, nbits;   nbytes = n >> 3;   nbits = n & 7;      bits->bytePtr += nbytes;   bits->bitPtr += nbits;      if (bits->bitPtr>7)   {      bits->bitPtr-=8;      bits->bytePtr++;   }}