#include <cstring>

#include <iostream>

#include <stdint.h>

#include <sass.h>

// gcc: g++ -shared plugin.cpp -o plugin.so -fPIC -Llib -lsass

// mingw: g++ -shared plugin.cpp -o plugin.dll -Llib -lsass

extern "C" const char* ADDCALL libsass_get_version() {

  return libsass_version();

}

union Sass_Value* custom_function(const union Sass_Value* s_args, Sass_Function_Entry cb, struct Sass_Compiler* comp)

{

  // get context/option struct associated with this compiler

  struct Sass_Context* ctx = sass_compiler_get_context(comp);

  struct Sass_Options* opts = sass_compiler_get_options(comp);

  // get the cookie from function descriptor

  void* cookie = sass_function_get_cookie(cb);

  // we actually abuse the void* to store an "int"

  return sass_make_number((intptr_t)cookie, "px");

}

extern "C" Sass_Function_List ADDCALL libsass_load_functions()

{

  // allocate a custom function caller

  Sass_Function_Entry c_func =

    sass_make_function("foo()", custom_function, (void*)42);

  // create list of all custom functions

  Sass_Function_List fn_list = sass_make_function_list(1);

  // put the only function in this plugin to the list

  sass_function_set_list_entry(fn_list, 0, c_func);

  // return the list

  return fn_list;

}

Sass_Import_List custom_importer(const char* cur_path, Sass_Importer_Entry cb, struct Sass_Compiler* comp)

{

  // get the cookie from importer descriptor

  void* cookie = sass_importer_get_cookie(cb);

  // create a list to hold our import entries

  Sass_Import_List incs = sass_make_import_list(1);

  // create our only import entry (route path back)

  incs[0] = sass_make_import_entry(cur_path, 0, 0);

  // return imports

  return incs;

}

extern "C" Sass_Importer_List ADDCALL libsass_load_importers()

{

  // allocate a custom function caller

  Sass_Importer_Entry c_imp =

    sass_make_importer(custom_importer, - 99, (void*)42);

  // create list of all custom functions

  Sass_Importer_List imp_list = sass_make_importer_list(1);

  // put the only function in this plugin to the list

  sass_importer_set_list_entry(imp_list, 0, c_imp);

  // return the list

  return imp_list;

}