mirror of
https://github.com/moses-smt/mosesdecoder.git
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115 lines
2.7 KiB
C++
115 lines
2.7 KiB
C++
// Step of trie builder: create sorted files.
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#ifndef LM_TRIE_SORT_H
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#define LM_TRIE_SORT_H
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#include "lm/max_order.hh"
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#include "lm/word_index.hh"
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#include "util/file.hh"
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#include "util/scoped.hh"
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#include <cstddef>
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#include <functional>
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#include <string>
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#include <vector>
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#include <stdint.h>
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namespace util {
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class FilePiece;
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} // namespace util
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namespace lm {
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class PositiveProbWarn;
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namespace ngram {
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class SortedVocabulary;
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struct Config;
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namespace trie {
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class EntryCompare : public std::binary_function<const void*, const void*, bool> {
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public:
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explicit EntryCompare(unsigned char order) : order_(order) {}
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bool operator()(const void *first_void, const void *second_void) const {
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const WordIndex *first = static_cast<const WordIndex*>(first_void);
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const WordIndex *second = static_cast<const WordIndex*>(second_void);
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const WordIndex *end = first + order_;
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for (; first != end; ++first, ++second) {
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if (*first < *second) return true;
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if (*first > *second) return false;
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}
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return false;
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}
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private:
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unsigned char order_;
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};
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class RecordReader {
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public:
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RecordReader() : remains_(true) {}
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void Init(FILE *file, std::size_t entry_size);
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void *Data() { return data_.get(); }
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const void *Data() const { return data_.get(); }
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RecordReader &operator++() {
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std::size_t ret = fread(data_.get(), entry_size_, 1, file_);
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if (!ret) {
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UTIL_THROW_IF(!feof(file_), util::ErrnoException, "Error reading temporary file");
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remains_ = false;
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}
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return *this;
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}
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operator bool() const { return remains_; }
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void Rewind();
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std::size_t EntrySize() const { return entry_size_; }
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void Overwrite(const void *start, std::size_t amount);
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private:
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FILE *file_;
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util::scoped_malloc data_;
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bool remains_;
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std::size_t entry_size_;
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};
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class SortedFiles {
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public:
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// Build from ARPA
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SortedFiles(const Config &config, util::FilePiece &f, std::vector<uint64_t> &counts, std::size_t buffer, const std::string &file_prefix, SortedVocabulary &vocab);
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int StealUnigram() {
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return unigram_.release();
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}
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FILE *Full(unsigned char order) {
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return full_[order - 2].get();
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}
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FILE *Context(unsigned char of_order) {
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return context_[of_order - 2].get();
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}
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private:
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void ConvertToSorted(util::FilePiece &f, const SortedVocabulary &vocab, const std::vector<uint64_t> &counts, const std::string &prefix, unsigned char order, PositiveProbWarn &warn, void *mem, std::size_t mem_size);
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util::scoped_fd unigram_;
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util::scoped_FILE full_[KENLM_MAX_ORDER - 1], context_[KENLM_MAX_ORDER - 1];
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};
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} // namespace trie
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} // namespace ngram
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} // namespace lm
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#endif // LM_TRIE_SORT_H
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