% ----------------------------------------------------------------------------
% the XSIM package - base module
% 
%   eXercise Sheets IMproved
% 
% ----------------------------------------------------------------------------
% Clemens Niederberger
% Web:    https://github.com/cgnieder/xsim
% E-Mail: contact@mychemistry.eu
% ----------------------------------------------------------------------------
% Copyright 2017--2018 Clemens Niederberger
% 
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3
% of this license or (at your option) any later version.
% The latest version of this license is in
%   http://www.latex-project.org/lppl.txt
% and version 1.3 or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
% 
% This work has the LPPL maintenance status `maintained'.
% 
% The Current Maintainer of this work is Clemens Niederberger.
% ----------------------------------------------------------------------------
% If you have any ideas, questions, suggestions or bugs to report, please
% feel free to contact me.
% ----------------------------------------------------------------------------
\XSIMmodule{base}{basic functionality of the package}

\xsim_load_modules:n {auxfile}

% ----------------------------------------------------------------------------
% variants of kernel functions:
\cs_generate_variant:Nn \seq_set_split:Nnn  {Nnx,NV}
\cs_generate_variant:Nn \seq_gset_split:Nnn {c,cVx,cnx}
\cs_generate_variant:Nn \seq_use:Nn         {cV}
\cs_generate_variant:Nn \seq_count:N        {c}
\cs_generate_variant:Nn \seq_if_empty:NT    {c}
\cs_generate_variant:Nn \seq_if_in:NnT      {cV}
\cs_generate_variant:Nn \seq_gremove_all:Nn {cV}
\cs_generate_variant:Nn \seq_gput_right:Nn  {cV}
\cs_generate_variant:Nn \prop_put:Nnn       {cxx}
\cs_generate_variant:Nn \prop_gput:Nnn      {Nx,Nnx,cxx}
\cs_generate_variant:Nn \prop_item:Nn       {c}
\cs_generate_variant:Nn \prop_if_in:NnTF    {Nx}
\cs_generate_variant:Nn \use:nn             {nx}
\cs_generate_variant:Nn \file_input:n       {V,x}
\cs_generate_variant:Nn \file_if_exist:nT   {V,x}
\cs_generate_variant:Nn \file_if_exist:nTF  {V}
\cs_generate_variant:Nn \msg_error:nnnnn    {nnnxx}
\cs_generate_variant:Nn \keys_define:nn     {nx}
\cs_generate_variant:Nn \keys_set:nn        {xn}
\cs_generate_variant:Nn \tl_mixed_case:n    {x,f}
\cs_generate_variant:Nn \tl_if_eq:nnTF      {ff,V}
\cs_generate_variant:Nn \tl_if_eq:nnT       {x}
\cs_generate_variant:Nn \tl_if_blank:nTF    {f}
\cs_generate_variant:Nn \tl_set_rescan:Nnn  {Nnn}
\cs_generate_variant:Nn \iow_now:Nn         {NV}
\cs_generate_variant:Nn \str_if_eq:nnT      {x}
\cs_generate_variant:Nn \iow_now:Nn         {NV}
\cs_generate_variant:Nn \prg_new_protected_conditional:Npnn {c}

% ----------------------------------------------------------------------------
% temporary variables:
\tl_new:N    \l__xsim_tmpa_tl
\tl_new:N    \l__xsim_tmpb_tl
\tl_new:N    \l__xsim_tmpc_tl
\tl_new:N    \l__xsim_tmpd_tl

\str_new:N   \l__xsim_tmpa_str
\str_new:N   \l__xsim_tmpb_str
\str_new:N   \l__xsim_tmpc_str

\bool_new:N  \l__xsim_tmpa_bool
\bool_new:N  \l__xsim_tmpb_bool
\bool_new:N  \l__xsim_tmpc_bool

\dim_new:N   \l__xsim_tmpa_dim
\dim_new:N   \l__xsim_tmpb_dim
\dim_new:N   \l__xsim_tmpc_dim

\seq_new:N   \l__xsim_tmpa_seq
\seq_new:N   \l__xsim_tmpb_seq
\seq_new:N   \l__xsim_tmpc_seq

\int_new:N   \l__xsim_tmpa_int
\int_new:N   \l__xsim_tmpb_int
\int_new:N   \l__xsim_tmpc_int

\box_new:N   \l__xsim_tmpa_box
\box_new:N   \l__xsim_tmpb_box
\box_new:N   \l__xsim_tmpc_box

\clist_new:N \l__xsim_tmpa_clist
\clist_new:N \l__xsim_tmpb_clist
\clist_new:N \l__xsim_tmpc_clist

% ----------------------------------------------------------------------------

\prg_new_conditional:Npnn \xsim_if_komascript: {T,F,TF}
  {
    \cs_if_exist:cTF {KOMAClassName}
      { \prg_return_true: }
      { \prg_return_false: }
  }

% ----------------------------------------------------------------------------

\prg_new_conditional:Npnn \xsim_if_final: {p,T,F,TF}
  {
    \bool_if:NTF \g_xsim_final_bool
      { \prg_return_true: }
      { \prg_return_false: }
  }

\prg_new_conditional:Npnn \xsim_if_verbose: {p,T,F,TF}
  {
    \bool_if:NTF \g_xsim_verbose_bool
      { \prg_return_true: }
      { \prg_return_false: }
  }

\prg_new_conditional:Npnn \xsim_if_rerun: {p,T,F,TF}
  {
    \bool_if:NTF \g__xsim_rerun_bool
      { \prg_return_true: }
      { \prg_return_false: }
  }

\prg_new_conditional:Npnn \xsim_if_clear_aux: {p,T,F,TF}
  {
    \xsim_if_final:TF
      { \prg_return_false: }
      {
        \bool_if:NTF \g_xsim_clear_aux_bool
          { \prg_return_true: }
          { \prg_return_false: }
      }
  }

\cs_new_protected:Npn \xsim_verbose:n #1
  { \xsim_if_verbose:T { \msg_info:nnn {xsim} {verbose} {#1} } }
\cs_generate_variant:Nn \xsim_verbose:n {x}

\cs_new_protected:Npn \xsim_rerun:
  { \bool_gset_true:N \g__xsim_rerun_bool }

\prg_new_conditional:Npnn \xsim_if_chapter: {p,T,F,TF}
  {
    \bool_if:nTF
      { \cs_if_exist_p:N \chapter && \cs_if_exist_p:N \c@chapter }
      { \prg_return_true: }
      { \prg_return_false: }
  }

% ----------------------------------------------------------------------------

% #1: macro name
% #2: 0 to 9 times `n' (= number of arguments of internal item)
% #3: code; may contain a suiting \__xsim_loop_item:<nnn>
\cs_new_protected:Npn \xsim_define_loop_macro:Nnn #1#2#3
  {
    \xsim_verbose:n { Defining~ loop~ macro~ #1 }
    \cs_new_protected:Npn #1 ##1##2
      { \cs_set:cn {__xsim_loop_item:#2} {##2} #3 }
  }

% ----------------------------------------------------------------------------

\cs_new_protected:Npn \xsim_setup:n #1
  { \keys_set:nn {xsim} {#1} }

% ----------------------------------------------------------------------------
\file_input_stop:
