diff options
Diffstat (limited to 'decoder')
| -rw-r--r-- | decoder/hg_io.cc | 80 |
1 files changed, 56 insertions, 24 deletions
diff --git a/decoder/hg_io.cc b/decoder/hg_io.cc index d97ab3dc..59d0b851 100644 --- a/decoder/hg_io.cc +++ b/decoder/hg_io.cc @@ -134,7 +134,10 @@ inline void eatws(const std::string& in, int& c) { std::string getEscapedString(const std::string& in, int &c) { eatws(in,c); - if (get(in,c++) != quote) return "ERROR"; + if (get(in,c++) != quote) { + cerr << "Expected escaped string to begin with " << quote << ". Got " << get(in, c - 1) << "\n"; + abort(); + } std::string res; char cur = 0; do { @@ -152,7 +155,7 @@ float getFloat(const std::string& in, int &c) { std::string tmp; eatws(in,c); - while (c < (int)in.size() && get(in,c) != ' ' && get(in,c) != ')' && get(in,c) != ',') { + while (c < (int)in.size() && get(in,c) != ' ' && get(in,c) != ')' && get(in,c) != ',' && get(in,c) != '}') { tmp += get(in,c++); } eatws(in,c); @@ -177,7 +180,18 @@ int getInt(const std::string& in, int &c) // maximum number of nodes permitted #define MAX_NODES 100000000 -// parse ('foo', 0.23) + +void ReadPLFFeature(const std::string& in, int &c, map<string, float>& features) { + eatws(in,c); + string name = getEscapedString(in,c); + eatws(in,c); + if (get(in,c++) != ':') { cerr << "PCN/PLF parse error: expected : after feature name " << name << "\n"; abort(); } + float value = getFloat(in, c); + eatws(in,c); + features[name] = value; +} + +// parse ('foo', 0.23, 1) void ReadPLFEdge(const std::string& in, int &c, int cur_node, Hypergraph* hg) { if (get(in,c++) != '(') { cerr << "PCN/PLF parse error: expected (\n"; abort(); } vector<WordID> ewords(2, 0); @@ -186,22 +200,46 @@ void ReadPLFEdge(const std::string& in, int &c, int cur_node, Hypergraph* hg) { r->ComputeArity(); // cerr << "RULE: " << r->AsString() << endl; if (get(in,c++) != ',') { cerr << in << endl; cerr << "PCN/PLF parse error: expected , after string\n"; abort(); } + eatws(in,c); + + map<string, float> features; size_t cnNext = 1; - std::vector<float> probs; - probs.push_back(getFloat(in,c)); - while (get(in,c) == ',') { + // Read in sparse feature format + if (get(in,c) == '{') { c++; - float val = getFloat(in,c); - probs.push_back(val); - // cerr << val << endl; //REMO + ReadPLFFeature(in, c, features); + while (get(in,c) == ',') { + c++; + if (get(in,c) == '}') { break; } + ReadPLFFeature(in, c, features); + } + if (get(in,c++) != '}') { cerr << "PCN/PLF parse error: expected } after feature dictionary\n"; abort(); } + eatws(in,c); + if (get(in, c++) != ',') { cerr << "PCN/PLF parse error: expected , after feature dictionary\n"; abort(); } + cnNext = static_cast<size_t>(getFloat(in, c)); } - //if we read more than one prob, this was a lattice, last item was column increment - if (probs.size()>1) { + // Read in dense feature format + else { + std::vector<float> probs; + probs.push_back(getFloat(in,c)); + while (get(in,c) == ',') { + c++; + float val = getFloat(in,c); + probs.push_back(val); + // cerr << val << endl; //REMO + } + if (probs.size() == 0) { cerr << "PCN/PLF parse error: missing destination state increment\n"; abort(); } + + // the last item was column increment cnNext = static_cast<size_t>(probs.back()); probs.pop_back(); - if (cnNext < 1) { cerr << cnNext << endl << "PCN/PLF parse error: bad link length at last element of cn alt block\n"; abort(); } + + for (unsigned i = 0; i < probs.size(); ++i) { + features["LatticeCost_" + to_string(i)] = probs[i]; + } } - if (get(in,c++) != ')') { cerr << "PCN/PLF parse error: expected ) at end of cn alt block\n"; abort(); } + if (get(in,c++) != ')') { cerr << "PCN/PLF parse error: expected ) at end of cn alt block. Got " << get(in, c-1) << "\n"; abort(); } + if (cnNext < 1) { cerr << cnNext << endl << "PCN/PLF parse error: bad link length at last element of cn alt block\n"; abort(); } eatws(in,c); Hypergraph::TailNodeVector tail(1, cur_node); Hypergraph::Edge* edge = hg->AddEdge(r, tail); @@ -210,21 +248,15 @@ void ReadPLFEdge(const std::string& in, int &c, int cur_node, Hypergraph* hg) { assert(head_node < MAX_NODES); // prevent malicious PLFs from using all the memory if (hg->nodes_.size() < (head_node + 1)) { hg->ResizeNodes(head_node + 1); } hg->ConnectEdgeToHeadNode(edge, &hg->nodes_[head_node]); - if (probs.size() != 0) { - if (probs.size() == 1) { - edge->feature_values_.set_value(FD::Convert("LatticeCost"), probs[0]); - } else { - cerr << "Don't know how to deal with multiple lattice edge features: implement Python dictionary format.\n"; - abort(); - } + for (map<string, float>::iterator it = features.begin(); it != features.end(); ++it) { + edge->feature_values_.set_value(FD::Convert(it->first), it->second); } } -// parse (('foo', 0.23), ('bar', 0.77)) +// parse (('foo', 0.23, 1), ('bar', 0.77, 1)) void ReadPLFNode(const std::string& in, int &c, int cur_node, int line, Hypergraph* hg) { - //cerr << "PLF READING NODE " << cur_node << endl; if (hg->nodes_.size() < (cur_node + 1)) { hg->ResizeNodes(cur_node + 1); } - if (get(in,c++) != '(') { cerr << line << ": Syntax error 1\n"; abort(); } + if (get(in,c++) != '(') { cerr << line << ": Syntax error 1 in PLF\n"; abort(); } eatws(in,c); while (1) { if (c > (int)in.size()) { break; } @@ -249,7 +281,7 @@ void HypergraphIO::ReadFromPLF(const std::string& in, Hypergraph* hg, int line) hg->clear(); int c = 0; int cur_node = 0; - if (in[c++] != '(') { cerr << line << ": Syntax error!\n"; abort(); } + if (in[c++] != '(') { cerr << line << ": Syntax error in PLF!\n"; abort(); } while (1) { if (c > (int)in.size()) { break; } if (PLF::get(in,c) == ')') { |