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#ifndef LM_BUILDER_CORPUS_COUNT__
#define LM_BUILDER_CORPUS_COUNT__
#include "lm/word_index.hh"
#include "util/scoped.hh"
#include <cstddef>
#include <string>
#include <stdint.h>
namespace util {
class FilePiece;
namespace stream {
class ChainPosition;
} // namespace stream
} // namespace util
namespace lm {
namespace builder {
class CorpusCount {
public:
// Memory usage will be DedupeMultipler(order) * block_size + total_chain_size + unknown vocab_hash_size
static float DedupeMultiplier(std::size_t order);
// How much memory vocabulary will use based on estimated size of the vocab.
static std::size_t VocabUsage(std::size_t vocab_estimate);
// token_count: out.
// type_count aka vocabulary size. Initialize to an estimate. It is set to the exact value.
CorpusCount(util::FilePiece &from, int vocab_write, uint64_t &token_count, WordIndex &type_count, std::size_t entries_per_block);
void Run(const util::stream::ChainPosition &position);
private:
util::FilePiece &from_;
int vocab_write_;
uint64_t &token_count_;
WordIndex &type_count_;
std::size_t dedupe_mem_size_;
util::scoped_malloc dedupe_mem_;
};
} // namespace builder
} // namespace lm
#endif // LM_BUILDER_CORPUS_COUNT__
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