Support binary LCAO wavefunction input

docs/advanced/elec_properties/wfc.md

@@ -14,9 +14,11 @@ The files are stored in `OUT.${suffix}/`. Their pattern is `wfk{k}[s{spin}][g{ge
 
 With `out_freq_ion=0`, files are written only when the electronic calculation converges or reaches `scf_nmax`, and the names contain neither `g*` nor `e*`. During structural relaxation or molecular dynamics, each later ionic step overwrites the same files. With `out_freq_ion>0`, output is restricted to the ionic steps selected by `out_freq_ion` and occurs at multiples of `out_freq_elec`, at convergence, or at `scf_nmax`; both `g*` and `e*` are included in the file names. A static `calculation=scf` or `calculation=nscf` run also receives `g1e*` indices when `out_freq_ion>0`.
 
-The normal [`init_wfc=file`](../scf/initialization.md#wave-function) path reads only unindexed binary `wf*_pw.dat` files from `read_file_dir`. Generate directly reusable files with `out_wfc_pw=2` and normally `out_freq_ion=0`. Text `wf*_pw.txt` files and files containing `g*` or `e*` indices are not matched automatically.
+The [`init_wfc file binary`](../scf/initialization.md#wave-function) path reads only unindexed binary `wf*_pw.dat` files from `read_file_dir`. Generate directly reusable files with `out_wfc_pw=2` and normally `out_freq_ion=0`. Text `wf*_pw.txt` files and files containing `g*` or `e*` indices are not matched automatically.
 
-For `basis_type=lcao`, set [`out_wfc_lcao=1`](https://abacus-rtd.readthedocs.io/en/latest/advanced/input_files/input-main.html#out-wfc-lcao). Multi-k calculations generate `wfs{spin}k{k-point}_nao.txt`, while Gamma-only calculations generate `wfs{spin}_nao.txt`.
+For `basis_type=lcao`, [`out_wfc_lcao`](https://abacus-rtd.readthedocs.io/en/latest/advanced/input_files/input-main.html#out-wfc-lcao) controls the output of numerical-atomic-orbital coefficients: `1` writes text files with the `.txt` suffix and `2` writes binary files with the `.dat` suffix. Multi-k calculations generate `wfs{spin}k{k-point}_nao.txt` or `.dat`, while Gamma-only calculations generate `wfs{spin}_nao.txt` or `.dat`.
+
+To reuse LCAO coefficients, point `read_file_dir` to the coefficient files and set `init_wfc file txt` for text input or `init_wfc file binary` for binary input. The selected extension is required; there is no automatic format fallback. Only independent files without geometry-step indices are supported, not files accumulated with `out_app_flag`.
 
 ## Wave Function in Real Space
 

docs/advanced/input_files/input-main.md

@@ -730,7 +730,7 @@
 
 ### init_wfc
 
-- **Type**: String
+- **Type**: Vector of string
 - **Description**: The method used to initialize wavefunction coefficients. The available options and behavior depend on `basis_type`.
 
   For `basis_type=pw`, the available options are:
@@ -740,13 +740,18 @@
   - `random`: Initialize all bands with random coefficients.
   - `nao`: Use numerical atomic orbitals. If the number of NAO states is smaller than `nbands`, the remaining bands are initialized randomly.
   - `nao+random`: Apply an approximately 5% multiplicative random perturbation to the NAO initialization; any bands not covered by NAO states are first initialized randomly.
-  - `file`: Read binary `wf*_pw.dat` files generated with `out_wfc_pw=2` from `read_file_dir`. The files must match the current k points, `nbands`, plane-wave layout, and lattice.
+  - `file binary`: Read binary `wf*_pw.dat` files generated with `out_wfc_pw=2` from `read_file_dir`. The files must match the current k points, `nbands`, plane-wave layout, and lattice. The `txt` format is not supported for PW wavefunctions.
+
+  For `basis_type=lcao`, the file options are:
+
+  - `file txt`: Read text `wf*_nao.txt` files generated with `out_wfc_lcao=1` from `read_file_dir`.
+  - `file binary`: Read binary `wf*_nao.dat` files generated with `out_wfc_lcao=2` from `read_file_dir`.
 
-  For `basis_type=lcao`, only `file` triggers reading existing wavefunctions. It reads text `wf*_nao.txt` files generated with `out_wfc_lcao=1` from `read_file_dir`; binary files generated with `out_wfc_lcao=2` are not supported. The files must use a compatible NAO basis, match the current k-point and spin setup, and contain enough bands. Normal `init_wfc=file` reading matches files written with the default `out_app_flag=true`, which have no geometry-step index. Files written under `WFC/` with a `g*` geometry-step index when `out_app_flag=false` are not matched automatically.
+  The selected format is required; ABACUS does not automatically detect or fall back to the other format. The files must use a compatible NAO basis, match the current k-point and spin setup, and contain enough bands. File initialization matches independent files without geometry-step indices. Files accumulated with `out_app_flag` or files under `WFC/` with a `g*` geometry-step index are not supported.
 
   For `basis_type=lcao_in_pw`, `init_wfc` is automatically set to `nao`.
 
-  > Note: For `calculation=get_wf` or `calculation=get_pchg`, `init_wfc` is automatically set to `file`. If `basis_type=lcao_in_pw` is also used, the final value is `nao`.
+  > Note: For `calculation=get_wf` or `calculation=get_pchg`, non-file initialization choices are automatically changed to the file option appropriate for the selected basis. An explicitly selected file format is preserved. If `basis_type=lcao_in_pw` is also used, the final value is `nao`.
 - **Default**: atomic
 
 ### init_chg
@@ -1954,7 +1959,7 @@
 
   With `out_freq_ion=0`, files are written only when the electronic calculation converges or reaches `scf_nmax`; no `g*` or `e*` index is added. During structural relaxation or molecular dynamics, later ionic steps overwrite the same unindexed files. With `out_freq_ion` > 0, output is restricted to the ionic steps selected by `out_freq_ion` and is written when the electronic iteration is a multiple of `out_freq_elec`, when the calculation converges, or when it reaches `scf_nmax`. Both `g*` and `e*` indices are then added, including for a static `calculation=scf` or `calculation=nscf` run.
 
-  For `init_wfc=file`, ABACUS automatically reads only unindexed binary `wf*_pw.dat` files from `read_file_dir`. Such directly reusable files are normally generated with `out_wfc_pw=2` and `out_freq_ion=0`. Text `wf*_pw.txt` files and files containing `g*` or `e*` indices are not matched automatically.
+  With `init_wfc file binary`, ABACUS reads only unindexed binary `wf*_pw.dat` files from `read_file_dir`. Such directly reusable files are normally generated with `out_wfc_pw=2` and `out_freq_ion=0`. Text `wf*_pw.txt` files and files containing `g*` or `e*` indices are not matched automatically.
 
   > Note: In the 3.10-LTS version, the binary files are named `WAVEFUNC1.dat`, `WAVEFUNC2.dat`, etc.
 - **Default**: 0

docs/advanced/scf/initialization.md

@@ -24,10 +24,10 @@ For `basis_type=pw`, the available options are:
 * `random`: Initialize all bands with random coefficients.
 * `nao`: Use numerical atomic orbitals. If the number of NAO states is smaller than `nbands`, the remaining bands are initialized randomly.
 * `nao+random`: Apply an approximately 5% multiplicative random perturbation to the NAO initialization; any bands not covered by NAO states are first initialized randomly.
-* `file`: Read binary `wf*_pw.dat` files generated with [`out_wfc_pw=2`](../elec_properties/wfc.md) from `read_file_dir`. The files must match the current k points, `nbands`, plane-wave layout, and lattice.
+* `file binary`: Read binary `wf*_pw.dat` files generated with [`out_wfc_pw=2`](../elec_properties/wfc.md) from `read_file_dir`. The files must match the current k points, `nbands`, plane-wave layout, and lattice. The `txt` format is not supported for PW wavefunctions.
 
-For `basis_type=lcao`, only `init_wfc=file` triggers reading existing wavefunctions. LCAO wavefunctions initialize the density matrix and real-space charge density. ABACUS reads text `wf*_nao.txt` files generated with [`out_wfc_lcao=1`](../elec_properties/wfc.md) from `read_file_dir`; binary files generated with `out_wfc_lcao=2` are not supported. The files must use a compatible NAO basis, match the current k-point and spin setup, and contain enough bands. Normal `init_wfc=file` reading matches files written with the default `out_app_flag=true`, which have no geometry-step index. Files written under `WFC/` with a `g*` geometry-step index when `out_app_flag=false` are not matched automatically.
+For `basis_type=lcao`, use `init_wfc file txt` to read text `wf*_nao.txt` files generated with [`out_wfc_lcao=1`](../elec_properties/wfc.md), or `init_wfc file binary` to read binary `wf*_nao.dat` files generated with `out_wfc_lcao=2`, from `read_file_dir`. LCAO wavefunctions initialize the density matrix and real-space charge density. The selected format is required; ABACUS does not automatically detect or fall back to the other format. The files must use a compatible NAO basis, match the current k-point and spin setup, and contain enough bands. Only independent files without geometry-step indices are supported, not files accumulated with `out_app_flag`.
 
 For `basis_type=lcao_in_pw`, `init_wfc` is automatically set to `nao`.
 
-For `calculation=get_wf` or `calculation=get_pchg`, `init_wfc` is automatically set to `file`. If `basis_type=lcao_in_pw` is also used, the final value is `nao`.
+For `calculation=get_wf` or `calculation=get_pchg`, a non-file initialization choice is automatically changed to the file option appropriate for the selected basis. An explicitly selected file format is preserved. If `basis_type=lcao_in_pw` is also used, the final value is `nao`.

docs/parameters.yaml

@@ -161,7 +161,7 @@ parameters:
     availability: ""
   - name: init_wfc
     category: System variables
-    type: String
+    type: Vector of string
     description: |
       The method used to initialize wavefunction coefficients. The available options and behavior depend on `basis_type`.
 
@@ -171,13 +171,17 @@ parameters:
       * `random`: Initialize all bands with random coefficients.
       * `nao`: Use numerical atomic orbitals. If the number of NAO states is smaller than `nbands`, the remaining bands are initialized randomly.
       * `nao+random`: Apply an approximately 5% multiplicative random perturbation to the NAO initialization; any bands not covered by NAO states are first initialized randomly.
-      * `file`: Read binary `wf*_pw.dat` files generated with `out_wfc_pw=2` from `read_file_dir`. The files must match the current k points, `nbands`, plane-wave layout, and lattice.
+      * `file binary`: Read binary `wf*_pw.dat` files generated with `out_wfc_pw=2` from `read_file_dir`. The files must match the current k points, `nbands`, plane-wave layout, and lattice. The `txt` format is not supported for PW wavefunctions.
+
+      For `basis_type=lcao`, the file options are:
+      * `file txt`: Read text `wf*_nao.txt` files generated with `out_wfc_lcao=1` from `read_file_dir`.
+      * `file binary`: Read binary `wf*_nao.dat` files generated with `out_wfc_lcao=2` from `read_file_dir`.
 
-      For `basis_type=lcao`, only `file` triggers reading existing wavefunctions. It reads text `wf*_nao.txt` files generated with `out_wfc_lcao=1` from `read_file_dir`; binary files generated with `out_wfc_lcao=2` are not supported. The files must use a compatible NAO basis, match the current k-point and spin setup, and contain enough bands. Normal `init_wfc=file` reading matches files written with the default `out_app_flag=true`, which have no geometry-step index. Files written under `WFC/` with a `g*` geometry-step index when `out_app_flag=false` are not matched automatically.
+      The selected format is required; ABACUS does not automatically detect or fall back to the other format. The files must use a compatible NAO basis, match the current k-point and spin setup, and contain enough bands. File initialization matches independent files without geometry-step indices. Files accumulated with `out_app_flag` or files under `WFC/` with a `g*` geometry-step index are not supported.
 
       For `basis_type=lcao_in_pw`, `init_wfc` is automatically set to `nao`.
 
-      [NOTE] For `calculation=get_wf` or `calculation=get_pchg`, `init_wfc` is automatically set to `file`. If `basis_type=lcao_in_pw` is also used, the final value is `nao`.
+      [NOTE] For `calculation=get_wf` or `calculation=get_pchg`, non-file initialization choices are automatically changed to the file option appropriate for the selected basis. An explicitly selected file format is preserved. If `basis_type=lcao_in_pw` is also used, the final value is `nao`.
     default_value: atomic
     unit: ""
     availability: ""
@@ -3162,7 +3166,7 @@ parameters:
 
       With `out_freq_ion=0`, files are written only when the electronic calculation converges or reaches `scf_nmax`; no `g*` or `e*` index is added. During structural relaxation or molecular dynamics, later ionic steps overwrite the same unindexed files. With `out_freq_ion` > 0, output is restricted to the ionic steps selected by `out_freq_ion` and is written when the electronic iteration is a multiple of `out_freq_elec`, when the calculation converges, or when it reaches `scf_nmax`. Both `g*` and `e*` indices are then added, including for a static `calculation=scf` or `calculation=nscf` run.
 
-      For `init_wfc=file`, ABACUS automatically reads only unindexed binary `wf*_pw.dat` files from `read_file_dir`. Such directly reusable files are normally generated with `out_wfc_pw=2` and `out_freq_ion=0`. Text `wf*_pw.txt` files and files containing `g*` or `e*` indices are not matched automatically.
+      With `init_wfc file binary`, ABACUS reads only unindexed binary `wf*_pw.dat` files from `read_file_dir`. Such directly reusable files are normally generated with `out_wfc_pw=2` and `out_freq_ion=0`. Text `wf*_pw.txt` files and files containing `g*` or `e*` indices are not matched automatically.
 
       [NOTE] In the 3.10-LTS version, the binary files are named `WAVEFUNC1.dat`, `WAVEFUNC2.dat`, etc.
     default_value: "0"

source/source_esolver/esolver_ks_lcao_tddft.cpp

@@ -114,6 +114,7 @@ void ESolver_KS_LCAO_TDDFT<TR, Device>::before_all_runners(BaseCell& basecell, c
                                     this->kv.ik2iktot,
                                     this->kv.get_nkstot(),
                                     this->inp_->nspin,
+                                    this->inp_->init_wfc_file_format == "binary",
                                     0,
                                     TD_info::estep_shift))
         {

source/source_esolver/esolver_lr_lcao_tddft.cpp

@@ -805,6 +805,7 @@ void ModuleESolver::ESolver_LR<T, TR>::read_ks_wfc()
 				this->kv.ik2iktot,
 				this->kv.get_nkstot(),
                 this->inp_->nspin,
+				this->inp_->init_wfc_file_format == "binary",
 				/*skip_bands=*/this->nocc_max - this->nocc_in)) {
         ModuleBase::WARNING_QUIT("ESolver_LR", "read ground-state wavefunction failed.");
     }

source/source_io/module_parameter/input_parameter.h

@@ -45,7 +45,8 @@ struct Input_para
     double erf_height = 0;              ///< the height of the energy step for reciprocal vectors
     double erf_sigma = 0.1;             ///< the width of the energy step for reciprocal vectors
     int fft_mode = 0;                   ///< fftw mode 0: estimate, 1: measure, 2: patient, 3: exhaustive
-    std::string init_wfc = "atomic";    ///< "file","atomic","random"
+    std::string init_wfc = "atomic";         ///< "file", "atomic", "random", etc.
+    std::string init_wfc_file_format = "";   ///< normalized file format: "txt" or "binary"
     int pw_seed = 0;                    ///< random seed for initializing wave functions
     std::string init_chg = "atomic";    ///< "file","atomic"
     bool dm_to_rho = false;             ///< read density matrix from npz format and calculate charge density

source/source_io/module_parameter/read_inp_out.cpp

@@ -259,7 +259,7 @@ The file-name pattern is `wfk{k}[s{spin}][g{geometry step}][e{electronic iterati
 
 With `out_freq_ion=0`, files are written only when the electronic calculation converges or reaches `scf_nmax`; no `g*` or `e*` index is added. During structural relaxation or molecular dynamics, later ionic steps overwrite the same unindexed files. With `out_freq_ion` > 0, output is restricted to the ionic steps selected by `out_freq_ion` and is written when the electronic iteration is a multiple of `out_freq_elec`, when the calculation converges, or when it reaches `scf_nmax`. Both `g*` and `e*` indices are then added, including for a static `calculation=scf` or `calculation=nscf` run.
 
-For `init_wfc=file`, ABACUS automatically reads only unindexed binary `wf*_pw.dat` files from `read_file_dir`. Such directly reusable files are normally generated with `out_wfc_pw=2` and `out_freq_ion=0`. Text `wf*_pw.txt` files and files containing `g*` or `e*` indices are not matched automatically.
+With `init_wfc file binary`, ABACUS reads only unindexed binary `wf*_pw.dat` files from `read_file_dir`. Such directly reusable files are normally generated with `out_wfc_pw=2` and `out_freq_ion=0`. Text `wf*_pw.txt` files and files containing `g*` or `e*` indices are not matched automatically.
 
 [NOTE] In the 3.10-LTS version, the binary files are named `WAVEFUNC1.dat`, `WAVEFUNC2.dat`, etc.)";
         item.default_value = "0";