From 5f761c7611bfbbea3769a6731f7df10361fab5cf Mon Sep 17 00:00:00 2001
From: linpz <linpz@mail.ustc.edu.cn>
Date: Mon, 17 Nov 2025 01:17:38 +0800
Subject: [PATCH] Feature: add xc output info

---
 source/module_esolver/esolver_ks.cpp          |  1 +
 .../module_xc/xc_functional.cpp               | 67 +++++++++++++++++--
 .../module_xc/xc_functional.h                 |  1 +
 source/module_ri/Exx_LRI_interface.hpp        | 15 +----
 4 files changed, 63 insertions(+), 21 deletions(-)

diff --git a/source/module_esolver/esolver_ks.cpp b/source/module_esolver/esolver_ks.cpp
index 5a8ec9a4d8..8afefa70df 100644
--- a/source/module_esolver/esolver_ks.cpp
+++ b/source/module_esolver/esolver_ks.cpp
@@ -185,6 +185,7 @@ void ESolver_KS<T, Device>::before_all_runners(UnitCell& ucell, const Input_para
     {
         XC_Functional::set_xc_type(ucell.atoms[0].ncpp.xc_func);
     }
+    GlobalV::ofs_running<<XC_Functional::output_info()<<std::endl;
     ModuleBase::GlobalFunc::DONE(GlobalV::ofs_running, "SETUP UNITCELL");
 
     //! 4) setup the charge mixing parameters
diff --git a/source/module_hamilt_general/module_xc/xc_functional.cpp b/source/module_hamilt_general/module_xc/xc_functional.cpp
index 9e3023b640..2fc74ffbb7 100644
--- a/source/module_hamilt_general/module_xc/xc_functional.cpp
+++ b/source/module_hamilt_general/module_xc/xc_functional.cpp
@@ -34,24 +34,37 @@ int XC_Functional::get_func_type()
 {
     return func_type;
 }
+
 void XC_Functional::set_xc_first_loop(const UnitCell& ucell)
 {
+    ModuleBase::TITLE("XC_Functional", "set_xc_first_loop");
     /** In the special "two-level" calculation case,
 the first scf iteration only calculate the functional without exact
 exchange. but in "nscf" calculation, there is no need of "two-level"
 method. */
-    if (ucell.atoms[0].ncpp.xc_func == "HF" || ucell.atoms[0].ncpp.xc_func == "HSE" 
-        || ucell.atoms[0].ncpp.xc_func == "PBE0"|| ucell.atoms[0].ncpp.xc_func == "LC_PBE" 
-        || ucell.atoms[0].ncpp.xc_func == "LC_WPBE" || ucell.atoms[0].ncpp.xc_func == "LRC_WPBEH" 
-        || ucell.atoms[0].ncpp.xc_func == "CAM_PBEH") {
+    if (ucell.atoms[0].ncpp.xc_func == "HF" || ucell.atoms[0].ncpp.xc_func == "PBE0" || ucell.atoms[0].ncpp.xc_func == "HSE")
+    {
         XC_Functional::set_xc_type("pbe");
     }
-    else if (ucell.atoms[0].ncpp.xc_func == "SCAN0") {
-        XC_Functional::set_xc_type("scan");
+    else if ( ucell.atoms[0].ncpp.xc_func == "LC_PBE" || ucell.atoms[0].ncpp.xc_func == "LC_WPBE"
+        || ucell.atoms[0].ncpp.xc_func == "LRC_WPBEH" || ucell.atoms[0].ncpp.xc_func == "CAM_PBEH" )
+    {
+        XC_Functional::set_xc_type("pbe");
     }
-    else if (ucell.atoms[0].ncpp.xc_func == "B3LYP") {
+    // added by jghan, 2024-07-07
+    else if ( ucell.atoms[0].ncpp.xc_func == "MULLER" || ucell.atoms[0].ncpp.xc_func == "POWER"
+        || ucell.atoms[0].ncpp.xc_func == "WP22" || ucell.atoms[0].ncpp.xc_func == "CWP22" )
+    {
+        XC_Functional::set_xc_type("pbe");
+    }
+    else if (ucell.atoms[0].ncpp.xc_func == "B3LYP")
+    {
         XC_Functional::set_xc_type("blyp");
     }
+    else if (ucell.atoms[0].ncpp.xc_func == "SCAN0")
+    {
+        XC_Functional::set_xc_type("scan");
+    }
 }
 
 // The setting values of functional id according to the index in LIBXC
@@ -346,4 +359,44 @@ void XC_Functional::set_xc_type(const std::string xc_func_in)
     use_libxc = false;
 #endif
 
+}
+
+
+std::string XC_Functional::output_info()
+{
+  #ifdef USE_LIBXC
+    if(use_libxc)
+    {
+        std::stringstream ss;
+        ss<<" Libxc v"<<xc_version_string()<<std::endl;
+        ss<<"\t"<<xc_reference()<<std::endl;
+
+        std::vector<xc_func_type> funcs = XC_Functional_Libxc::init_func(func_id, XC_UNPOLARIZED);
+        for(const auto &func : funcs)
+        {
+            const xc_func_info_type *info = xc_func_get_info(&func);
+            ss<<" XC: "<<xc_func_info_get_name(info)<<std::endl;
+            for(int i=0; i<XC_MAX_REFERENCES; ++i)
+            {
+                const func_reference_type *ref = xc_func_info_get_references(func.info, i);
+                if(ref)
+                    ss<<"\t"<<xc_func_reference_get_ref(ref)<<std::endl;
+            }
+        }
+        XC_Functional_Libxc::finish_func(funcs);
+        return ss.str();
+    }
+    else
+    {
+        std::string s = " XC:\t";
+        for(const auto &id: func_id)
+            s += std::string(xc_functional_get_name(id))+"\t";
+        return s;
+    }
+  #else
+    std::string s = " XC:\t";
+    for(const auto &id: func_id)
+        s += std::to_string(id)+"\t";
+    return s;
+  #endif
 }
\ No newline at end of file
diff --git a/source/module_hamilt_general/module_xc/xc_functional.h b/source/module_hamilt_general/module_xc/xc_functional.h
index 379322a689..8a50f29767 100644
--- a/source/module_hamilt_general/module_xc/xc_functional.h
+++ b/source/module_hamilt_general/module_xc/xc_functional.h
@@ -88,6 +88,7 @@ class XC_Functional
 
 	public:
 	static std::vector<int> get_func_id() { return func_id; }
+	static std::string output_info();
 
 //-------------------
 //  xc_functional_wrapper_xc.cpp
diff --git a/source/module_ri/Exx_LRI_interface.hpp b/source/module_ri/Exx_LRI_interface.hpp
index 724835d997..0605c7e687 100644
--- a/source/module_ri/Exx_LRI_interface.hpp
+++ b/source/module_ri/Exx_LRI_interface.hpp
@@ -147,20 +147,7 @@ void Exx_LRI_Interface<T, Tdata>::exx_beforescf(const int istep,
         }
         else
         {
-            if (ucell.atoms[0].ncpp.xc_func == "HF" || ucell.atoms[0].ncpp.xc_func == "PBE0" || ucell.atoms[0].ncpp.xc_func == "HSE")
-            {
-                XC_Functional::set_xc_type("pbe");
-            }
-            else if (ucell.atoms[0].ncpp.xc_func == "SCAN0")
-            {
-                XC_Functional::set_xc_type("scan");
-            }
-            // added by jghan, 2024-07-07
-            else if ( ucell.atoms[0].ncpp.xc_func == "MULLER" || ucell.atoms[0].ncpp.xc_func == "POWER"
-                || ucell.atoms[0].ncpp.xc_func == "WP22" || ucell.atoms[0].ncpp.xc_func == "CWP22" )
-            {
-                XC_Functional::set_xc_type("pbe");
-            }
+            XC_Functional::set_xc_first_loop(ucell);
         }
 
         this->cal_exx_ions(ucell,PARAM.inp.out_ri_cv);