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#include <iostream>
#include <fstream>
#include <cassert>
#include <cmath>
#include <boost/utility.hpp>
#include <boost/program_options.hpp>
#include <boost/program_options/variables_map.hpp>
#include "boost/tuple/tuple.hpp"
#include "fdict.h"
#include "sparse_vector.h"
using namespace std;
namespace po = boost::program_options;
// useful for EM models parameterized by a bunch of multinomials
// this converts event counts (returned from cdec as feature expectations)
// into different keys and values (which are lists of all the events,
// conditioned on the key) for summing and normalization by a reducer
void InitCommandLine(int argc, char** argv, po::variables_map* conf) {
po::options_description opts("Configuration options");
opts.add_options()
("buffer_size,b", po::value<int>()->default_value(1), "Buffer size (in # of counts) before emitting counts")
("format,f",po::value<string>()->default_value("b64"), "Encoding of the input (b64 or text)");
po::options_description clo("Command line options");
clo.add_options()
("config", po::value<string>(), "Configuration file")
("help,h", "Print this help message and exit");
po::options_description dconfig_options, dcmdline_options;
dconfig_options.add(opts);
dcmdline_options.add(opts).add(clo);
po::store(parse_command_line(argc, argv, dcmdline_options), *conf);
if (conf->count("config")) {
ifstream config((*conf)["config"].as<string>().c_str());
po::store(po::parse_config_file(config, dconfig_options), *conf);
}
po::notify(*conf);
if (conf->count("help")) {
cerr << dcmdline_options << endl;
exit(1);
}
}
struct EventMapper {
int Map(int fid) {
int& cv = map_[fid];
if (!cv) {
cv = GetConditioningVariable(fid);
}
return cv;
}
void Clear() { map_.clear(); }
protected:
virtual int GetConditioningVariable(int fid) const = 0;
private:
map<int, int> map_;
};
struct LexAlignEventMapper : public EventMapper {
protected:
virtual int GetConditioningVariable(int fid) const {
const string& str = FD::Convert(fid);
size_t pos = str.rfind("_");
if (pos == string::npos || pos == 0 || pos >= str.size() - 1) {
cerr << "Bad feature for EM adapter: " << str << endl;
abort();
}
return FD::Convert(str.substr(0, pos));
}
};
int main(int argc, char** argv) {
po::variables_map conf;
InitCommandLine(argc, argv, &conf);
const bool use_b64 = conf["format"].as<string>() == "b64";
const int buffer_size = conf["buffer_size"].as<int>();
const string s_obj = "**OBJ**";
// 0<TAB>**OBJ**=12.2;Feat1=2.3;Feat2=-0.2;
// 0<TAB>**OBJ**=1.1;Feat1=1.0;
EventMapper* event_mapper = new LexAlignEventMapper;
map<int, SparseVector<double> > counts;
size_t total = 0;
while(cin) {
string line;
getline(cin, line);
if (line.empty()) continue;
int feat;
double val;
size_t i = line.find("\t");
assert(i != string::npos);
++i;
SparseVector<double> g;
double obj = 0;
if (use_b64) {
if (!B64::Decode(&obj, &g, &line[i], line.size() - i)) {
cerr << "B64 decoder returned error, skipping!\n";
continue;
}
} else { // text encoding - your counts will not be accurate!
while (i < line.size()) {
size_t start = i;
while (line[i] != '=' && i < line.size()) ++i;
if (i == line.size()) { cerr << "FORMAT ERROR\n"; break; }
string fname = line.substr(start, i - start);
if (fname == s_obj) {
feat = -1;
} else {
feat = FD::Convert(line.substr(start, i - start));
}
++i;
start = i;
while (line[i] != ';' && i < line.size()) ++i;
if (i - start == 0) continue;
val = atof(line.substr(start, i - start).c_str());
++i;
if (feat == -1) {
obj = val;
} else {
g.set_value(feat, val);
}
}
}
//cerr << "OBJ: " << obj << endl;
const SparseVector<double>& cg = g;
for (SparseVector<double>::const_iterator it = cg.begin(); it != cg.end(); ++it) {
const int cond_var = event_mapper->Map(it->first);
SparseVector<double>& cond_counts = counts[cond_var];
int delta = cond_counts.size();
cond_counts.add_value(it->first, it->second);
delta = cond_counts.size() - delta;
total += delta;
}
if (total > buffer_size) {
for (map<int, SparseVector<double> >::iterator it = counts.begin();
it != counts.end(); ++it) {
const SparseVector<double>& cc = it->second;
cout << FD::Convert(it->first) << '\t';
if (use_b64) {
B64::Encode(0.0, cc, &cout);
} else {
abort();
}
cout << endl;
}
cout << flush;
total = 0;
counts.clear();
}
}
return 0;
}
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