1 files changed, 157 insertions, 0 deletions
diff --git a/src/armadillo/include/armadillo_bits/fn_log_det.hpp b/src/armadillo/include/armadillo_bits/fn_log_det.hpp
new file mode 100644
index 0000000..3ea463e
--- /dev/null
+++ b/src/armadillo/include/armadillo_bits/fn_log_det.hpp
@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: Apache-2.0
+// 
+// Copyright 2008-2016 Conrad Sanderson (http://conradsanderson.id.au)
+// Copyright 2008-2016 National ICT Australia (NICTA)
+// 
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+// http://www.apache.org/licenses/LICENSE-2.0
+// 
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+// ------------------------------------------------------------------------
+
+
+//! \addtogroup fn_log_det
+//! @{
+
+
+
+//! log determinant of mat
+template<typename T1>
+inline
+bool
+log_det
+  (
+        typename T1::elem_type&          out_val,
+        typename T1::pod_type&           out_sign,
+  const Base<typename T1::elem_type,T1>& X,
+  const typename arma_blas_type_only<typename T1::elem_type>::result* junk = nullptr
+  )
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  typedef typename T1::elem_type eT;
+  typedef typename T1::pod_type   T;
+  
+  const bool status = op_log_det::apply_direct(out_val, out_sign, X.get_ref());
+  
+  if(status == false)
+    {
+    out_val  = eT(Datum<T>::nan);
+    out_sign = T(0);
+    
+    arma_debug_warn_level(3, "log_det(): failed to find determinant");
+    }
+  
+  return status;
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+inline
+std::complex<typename T1::pod_type>
+log_det
+  (
+  const Base<typename T1::elem_type,T1>& X,
+  const typename arma_blas_type_only<typename T1::elem_type>::result* junk = nullptr
+  )
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  typedef typename T1::elem_type eT;
+  typedef typename T1::pod_type   T;
+  
+  eT out_val  = eT(0);
+   T out_sign =  T(0);
+  
+  const bool status = op_log_det::apply_direct(out_val, out_sign, X.get_ref());
+  
+  if(status == false)
+    {
+    out_val  = eT(Datum<T>::nan);
+    out_sign = T(0);
+    
+    arma_stop_runtime_error("log_det(): failed to find determinant");
+    }
+  
+  return (out_sign >= T(1)) ? std::complex<T>(out_val) : (out_val + std::complex<T>(T(0),Datum<T>::pi));
+  }
+
+
+
+//
+
+
+
+template<typename T1>
+inline
+bool
+log_det_sympd
+  (
+        typename T1::pod_type&           out_val,
+  const Base<typename T1::elem_type,T1>& X,
+  const typename arma_blas_type_only<typename T1::elem_type>::result* junk = nullptr
+  )
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  typedef typename T1::pod_type T;
+  
+  out_val = T(0);
+  
+  const bool status = op_log_det_sympd::apply_direct(out_val, X.get_ref());
+  
+  if(status == false)
+    {
+    out_val = Datum<T>::nan;
+    
+    arma_debug_warn_level(3, "log_det_sympd(): given matrix is not symmetric positive definite");
+    }
+  
+  return status;
+  }
+
+
+
+template<typename T1>
+arma_warn_unused
+inline
+typename T1::pod_type
+log_det_sympd
+  (
+  const Base<typename T1::elem_type,T1>& X,
+  const typename arma_blas_type_only<typename T1::elem_type>::result* junk = nullptr
+  )
+  {
+  arma_extra_debug_sigprint();
+  arma_ignore(junk);
+  
+  typedef typename T1::pod_type T;
+  
+  T out_val = T(0);
+  
+  const bool status = op_log_det_sympd::apply_direct(out_val, X.get_ref());
+  
+  if(status == false)
+    {
+    out_val = Datum<T>::nan;
+    
+    arma_stop_runtime_error("log_det_sympd(): given matrix is not symmetric positive definite");
+    }
+  
+  return out_val;
+  }
+
+
+
+//! @}