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#include "vocab.hh"
#include <istream>
#include <iostream>
#include <cctype>
namespace lm {
namespace vocab {
void ReadSingle(std::istream &in, boost::unordered_set<std::string> &out) {
in.exceptions(std::istream::badbit);
std::string word;
while (in >> word) {
out.insert(word);
}
}
namespace {
bool IsLineEnd(std::istream &in) {
int got;
do {
got = in.get();
if (!in) return true;
if (got == '\n') return true;
} while (isspace(got));
in.unget();
return false;
}
}// namespace
// Read space separated words in enter separated lines. These lines can be
// very long, so don't read an entire line at a time.
unsigned int ReadMultiple(std::istream &in, boost::unordered_map<std::string, std::vector<unsigned int> > &out) {
in.exceptions(std::istream::badbit);
unsigned int sentence = 0;
bool used_id = false;
std::string word;
while (in >> word) {
used_id = true;
std::vector<unsigned int> &posting = out[word];
if (posting.empty() || (posting.back() != sentence))
posting.push_back(sentence);
if (IsLineEnd(in)) {
++sentence;
used_id = false;
}
}
return sentence + used_id;
}
} // namespace vocab
} // namespace lm
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