size_t ParagraphMetrics::computeRowSignature(Row const & row,
BufferParams const & bparams) const
{
boost::crc_32_type crc;
for (pos_type i = row.pos(); i < row.endpos(); ++i) {
char_type const b[] = { par_->getChar(i) };
crc.process_bytes(b, sizeof(char_type));
if (bparams.trackChanges) {
Change change = par_->lookupChange(i);
char_type const b[] = { static_cast<char_type>(change.type) };
// 1 byte is enough to encode Change::Type
crc.process_bytes(b, 1);
}
}
Dimension const & d = row.dimension();
char_type const b[] = { static_cast<char_type>(row.sel_beg),
static_cast<char_type>(row.sel_end),
row.begin_margin_sel, row.end_margin_sel, d.wid, d.asc, d.des};
crc.process_bytes(b, sizeof(b));
return crc.checksum();
}
