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#include "converter/segmenter_impl.h"
#include "base/base.h"
#include "base/bitarray.h"
#include "converter/node.h"
namespace mozc {
namespace {
#include "converter/boundary_data.h"
#include "converter/segmenter_data.h"
} // namespace
SegmenterImpl::SegmenterImpl() {}
SegmenterImpl::~SegmenterImpl() {}
bool SegmenterImpl::IsBoundary(const Node *lnode, const Node *rnode,
bool is_single_segment) const {
if (lnode->node_type == Node::BOS_NODE ||
rnode->node_type == Node::EOS_NODE) {
return true;
}
// return always false in prediction mode.
// This implies that converter always returns single-segment-result
// in prediction mode.
if (is_single_segment) {
return false;
}
const bool is_boundary = IsBoundary(lnode->rid, rnode->lid);
// Concatenate particle and content word into one segment,
// if lnode locates at the beginning of user input.
// This hack is for handling ambiguous bunsetsu segmentation.
// e.g. "かみ|にかく" => "紙|に書く" or "紙二角".
// If we segment "に書く" into two segments, "二角" is never be shown.
// There exits some implicit assumpution that user expects that his/her input
// becomes one bunsetu. So, it would be better to keep "二角" even after "紙".
if (is_boundary && (lnode->attributes & Node::STARTS_WITH_PARTICLE)) {
return false;
}
return is_boundary;
}
// use only for gen_segmenter_bitarrray.
bool SegmenterImpl::IsBoundary(uint16 rid, uint16 lid) const {
//return IsBoundaryInternal(rid, lid);
return BitArray::GetValue(reinterpret_cast<const char*>
(kSegmenterBitArrayData_data),
kCompressedLIDTable[rid] +
kCompressedLSize *
kCompressedRIDTable[lid]);
}
// static
int32 SegmenterImpl::GetPrefixPenalty(uint16 lid) const {
return kBoundaryData[lid].prefix_penalty;
}
// static
int32 SegmenterImpl::GetSuffixPenalty(uint16 rid) const {
return kBoundaryData[rid].suffix_penalty;
}
} // namespace mozc