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#include "external_scorer.h"
#include <cstdio> // popen
#include <cstdlib>
#include <sstream>
#include <iostream>
#include <cassert>
#include "tdict.h"
using namespace std;
ScoreServer::ScoreServer(const string& cmd) : pipe_() {
cerr << "Invoking " << cmd << " ..." << endl;
pipe_ = popen(cmd.c_str(), "r+");
assert(pipe_);
string dummy;
RequestResponse("EVAL ||| Reference initialization string . ||| Testing initialization string .\n", &dummy);
assert(dummy.size() > 0);
cerr << "Connection established.\n";
}
ScoreServer::~ScoreServer() {
pclose(pipe_);
}
double ScoreServer::ComputeScore(const vector<float>& fields) {
ostringstream os;
os << "EVAL";
for (unsigned i = 0; i < fields.size(); ++i)
os << ' ' << fields[i];
os << endl;
string sres;
RequestResponse(os.str(), &sres);
return strtod(sres.c_str(), NULL);
}
void ScoreServer::Evaluate(const vector<vector<WordID> >& refs, const vector<WordID>& hyp, vector<float>* fields) {
ostringstream os;
os << "SCORE";
for (unsigned i = 0; i < refs.size(); ++i) {
os << " |||";
for (unsigned j = 0; j < refs[i].size(); ++j) {
os << ' ' << TD::Convert(refs[i][j]);
}
}
os << " |||";
for (unsigned i = 0; i < hyp.size(); ++i) {
os << ' ' << TD::Convert(hyp[i]);
}
os << endl;
string sres;
RequestResponse(os.str(), &sres);
istringstream is(sres);
double val;
fields->clear();
while(is >> val) {
fields->push_back(val);
}
}
#define MAX_BUF 16000
void ScoreServer::RequestResponse(const string& request, string* response) {
fprintf(pipe_, "%s", request.c_str());
fflush(pipe_);
char buf[MAX_BUF];
size_t cr = fread(buf, 1, MAX_BUF, pipe_);
if (cr == 0) {
cerr << "Read error. Request: " << request << endl;
abort();
}
while (buf[cr-1] != '\n') {
size_t n = fread(&buf[cr], 1, MAX_BUF-cr, pipe_);
assert(n > 0);
cr += n;
assert(cr < MAX_BUF);
}
buf[cr - 1] = 0;
*response = buf;
}
struct ExternalScore : public ScoreBase<ExternalScore> {
ExternalScore() : score_server() {}
explicit ExternalScore(const ScoreServer* s) : score_server(s), fields() {}
ExternalScore(const ScoreServer* s, const vector<float>& f) : score_server(s), fields(f) {}
float ComputePartialScore() const { return 0.0;}
float ComputeScore() const {
// TODO make EVAL call
assert(!"not implemented");
}
void ScoreDetails(string* details) const {
ostringstream os;
os << "EXT=" << ComputeScore() << " <";
for (unsigned i = 0; i < fields.size(); ++i)
os << (i ? " " : "") << fields[i];
os << '>';
*details = os.str();
}
void PlusPartialEquals(const Score&, int, int, int){
assert(!"not implemented"); // no idea
}
void PlusEquals(const Score& delta, const float scale) {
assert(!"not implemented"); // don't even know what this is
}
void PlusEquals(const Score& delta) {
if (static_cast<const ExternalScore&>(delta).score_server) score_server = static_cast<const ExternalScore&>(delta).score_server;
if (fields.size() != static_cast<const ExternalScore&>(delta).fields.size())
fields.resize(max(fields.size(), static_cast<const ExternalScore&>(delta).fields.size()));
for (unsigned i = 0; i < static_cast<const ExternalScore&>(delta).fields.size(); ++i)
fields[i] += static_cast<const ExternalScore&>(delta).fields[i];
}
ScoreP GetZero() const {
return ScoreP(new ExternalScore(score_server));
}
ScoreP GetOne() const {
return ScoreP(new ExternalScore(score_server));
}
void Subtract(const Score& rhs, Score* res) const {
static_cast<ExternalScore*>(res)->score_server = score_server;
vector<float>& rf = static_cast<ExternalScore*>(res)->fields;
rf.resize(max(fields.size(), static_cast<const ExternalScore&>(rhs).fields.size()));
for (unsigned i = 0; i < rf.size(); ++i) {
rf[i] = (i < fields.size() ? fields[i] : 0.0f) -
(i < static_cast<const ExternalScore&>(rhs).fields.size() ? static_cast<const ExternalScore&>(rhs).fields[i] : 0.0f);
}
}
void Encode(string* out) const {
ostringstream os;
}
bool IsAdditiveIdentity() const {
for (int i = 0; i < fields.size(); ++i)
if (fields[i]) return false;
return true;
}
const ScoreServer* score_server;
vector<float> fields;
};
ScoreP ExternalSentenceScorer::ScoreCandidate(const Sentence& hyp) const {
ExternalScore* res = new ExternalScore(eval_server);
eval_server->Evaluate(refs, hyp, &res->fields);
return ScoreP(res);
}
ScoreP ExternalSentenceScorer::ScoreCCandidate(const Sentence& hyp) const {
assert(!"not implemented");
}
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