Blame view
tools/openfst-1.6.7/src/script/weight-class.cc
2.88 KB
8dcb6dfcb
first commit
|
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 |
// See www.openfst.org for extensive documentation on this weighted
// finite-state transducer library.
#include <fst/script/weight-class.h>
namespace fst {
namespace script {
REGISTER_FST_WEIGHT(StdArc::Weight);
REGISTER_FST_WEIGHT(LogArc::Weight);
REGISTER_FST_WEIGHT(Log64Arc::Weight);
WeightClass::WeightClass(const string &weight_type, const string &weight_str) {
WeightClassRegister *reg = WeightClassRegister::GetRegister();
StrToWeightImplBaseT stw = reg->GetEntry(weight_type);
if (!stw) {
FSTERROR() << "Unknown weight type: " << weight_type;
impl_.reset();
return;
}
impl_.reset(stw(weight_str, "WeightClass", 0));
}
WeightClass WeightClass::Zero(const string &weight_type) {
return WeightClass(weight_type, __ZERO__);
}
WeightClass WeightClass::One(const string &weight_type) {
return WeightClass(weight_type, __ONE__);
}
WeightClass WeightClass::NoWeight(const string &weight_type) {
return WeightClass(weight_type, __NOWEIGHT__);
}
bool WeightClass::WeightTypesMatch(const WeightClass &other,
const string &op_name) const {
if (Type() != other.Type()) {
FSTERROR() << "Weights with non-matching types passed to " << op_name
<< ": " << Type() << " and " << other.Type();
return false;
}
return true;
}
bool operator==(const WeightClass &lhs, const WeightClass &rhs) {
const auto *lhs_impl = lhs.GetImpl();
const auto *rhs_impl = rhs.GetImpl();
if (!(lhs_impl && rhs_impl && lhs.WeightTypesMatch(rhs, "operator=="))) {
return false;
}
return *lhs_impl == *rhs_impl;
}
bool operator!=(const WeightClass &lhs, const WeightClass &rhs) {
return !(lhs == rhs);
}
WeightClass Plus(const WeightClass &lhs, const WeightClass &rhs) {
const auto *rhs_impl = rhs.GetImpl();
if (!(lhs.GetImpl() && rhs_impl && lhs.WeightTypesMatch(rhs, "Plus"))) {
return WeightClass();
}
WeightClass result(lhs);
result.GetImpl()->PlusEq(*rhs_impl);
return result;
}
WeightClass Times(const WeightClass &lhs, const WeightClass &rhs) {
const auto *rhs_impl = rhs.GetImpl();
if (!(lhs.GetImpl() && rhs_impl && lhs.WeightTypesMatch(rhs, "Plus"))) {
return WeightClass();
}
WeightClass result(lhs);
result.GetImpl()->TimesEq(*rhs_impl);
return result;
}
WeightClass Divide(const WeightClass &lhs, const WeightClass &rhs) {
const auto *rhs_impl = rhs.GetImpl();
if (!(lhs.GetImpl() && rhs_impl && lhs.WeightTypesMatch(rhs, "Divide"))) {
return WeightClass();
}
WeightClass result(lhs);
result.GetImpl()->DivideEq(*rhs_impl);
return result;
}
WeightClass Power(const WeightClass &weight, size_t n) {
if (!weight.GetImpl()) return WeightClass();
WeightClass result(weight);
result.GetImpl()->PowerEq(n);
return result;
}
std::ostream &operator<<(std::ostream &ostrm, const WeightClass &weight) {
weight.impl_->Print(&ostrm);
return ostrm;
}
} // namespace script
} // namespace fst
|