interp_method_check.c

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// Copyright (c) 2024 The YAC Authors
//
// SPDX-License-Identifier: BSD-3-Clause
 
#ifdef HAVE_CONFIG_H
// Get the definition of the 'restrict' keyword.
#include "config.h"
#endif
 
#include <string.h>
 
#include "interp_method_internal.h"
#include "utils_core.h"
#include "ensure_array_size.h"
#include "interp_method_check.h"
 
static size_t do_search_check(struct interp_method * method,
                              struct yac_interp_grid * interp_grid,
                              size_t * tgt_points, size_t count,
                              struct yac_interp_weights * weights);
static void delete_check(struct interp_method * method);
 
static struct interp_method_vtable
  interp_method_check_vtable = {
    .do_search = do_search_check,
    .delete = delete_check};
 
struct interp_method_check {
 
  struct interp_method_vtable * vtable;
  func_do_search do_search_callback;
  void * do_search_user_data;
};
 
static size_t do_search_check (struct interp_method * method,
                               struct yac_interp_grid * interp_grid,
                               size_t * tgt_points, size_t count,
                               struct yac_interp_weights * weights) {
 
  UNUSED(weights);
 
  struct interp_method_check * method_check =
    (struct interp_method_check *)method;
 
  yac_int * tgt_global_ids = xmalloc(count * sizeof(*tgt_global_ids));
  yac_coordinate_pointer tgt_coordinates =
    xmalloc(count * sizeof(*tgt_coordinates));
 
  yac_interp_grid_get_tgt_global_ids(
    interp_grid, tgt_points, count, tgt_global_ids);
  yac_interp_grid_get_tgt_coordinates(
    interp_grid, tgt_points, count, tgt_coordinates);
 
  if (method_check->do_search_callback != NULL)
    method_check->do_search_callback(
      tgt_global_ids, (yac_const_coordinate_pointer)tgt_coordinates, count,
      method_check->do_search_user_data);
 
  free(tgt_coordinates);
  free(tgt_global_ids);
 
  return 0;
}
 
struct interp_method * yac_interp_method_check_new(
  func_constructor constructor_callback,
  void * constructor_user_data,
  func_do_search do_search_callback,
  void * do_search_user_data) {
 
  struct interp_method_check * method = xmalloc(1 * sizeof(*method));
 
  method->vtable = &interp_method_check_vtable;
  method->do_search_callback = do_search_callback;
  method->do_search_user_data = do_search_user_data;
 
  if (constructor_callback != NULL)
    constructor_callback(constructor_user_data);
 
  return (struct interp_method*)method;
}
 
static void delete_check(struct interp_method * method) {
  free(method);
}
 
enum callback_type {
  CONSTRUCTOR,
  DO_SEARCH,
};
typedef void (*func_dummy)(void);
static struct {
  struct {
    func_dummy callback;
    void * user_data;
  } value;
  enum callback_type type;
  char * key;
} * callback_lookup_table = NULL;
static size_t callback_lookup_table_array_size = 0;
static size_t callback_lookup_table_size = 0;
 
static void interp_method_check_add_callback(
  func_dummy callback, enum callback_type type, void * user_data,
  char const * key) {
 
  // ensure that the lookup table does already contain an entry with the same
  // key and type
  for (size_t i = 0; i < callback_lookup_table_size; ++i)
    YAC_ASSERT_F(
      strcmp(callback_lookup_table[i].key, key) ||
      (callback_lookup_table[i].type != type),
      "ERROR(interp_method_check_add_callback): "
      "key \"%s\" has been set for the same callback type (%d)",
      key, (int)type)
 
  ENSURE_ARRAY_SIZE(callback_lookup_table, callback_lookup_table_array_size,
                    callback_lookup_table_size + 1);
 
  callback_lookup_table[callback_lookup_table_size].key =
    xmalloc((strlen(key)+1) * sizeof(*key));
  strcpy(callback_lookup_table[callback_lookup_table_size].key, key);
  callback_lookup_table[callback_lookup_table_size].type = type;
  callback_lookup_table[callback_lookup_table_size].value.callback = callback;
  callback_lookup_table[callback_lookup_table_size].value.user_data = user_data;
  callback_lookup_table_size++;
}
 
static void interp_method_get_callback(
  char const * key, func_dummy * callback, enum callback_type type,
  void ** user_data) {
 
  *callback = NULL;
  *user_data = NULL;
  for (size_t i = 0;
      (i < callback_lookup_table_size) &&
      (*callback == NULL) && (*user_data == NULL); ++i) {
    if ((!strcmp(callback_lookup_table[i].key, key)) &&
        (callback_lookup_table[i].type == type)) {
      *callback = callback_lookup_table[i].value.callback;
      *user_data = callback_lookup_table[i].value.user_data;
      return;
    }
  }
}
 
void yac_interp_method_check_add_constructor_callback(
  func_constructor constructor_callback, void * user_data, char const * key) {
 
  interp_method_check_add_callback(
    (func_dummy)constructor_callback, CONSTRUCTOR, user_data, key);
}
 
void yac_interp_method_check_get_constructor_callback(
  char const * key, func_constructor * constructor_callback,
  void ** user_data) {
 
  interp_method_get_callback(
    key, (func_dummy*)constructor_callback, CONSTRUCTOR, user_data);
}
 
void yac_interp_method_check_add_do_search_callback(
  func_do_search do_search_callback, void * user_data, char const * key) {
 
  interp_method_check_add_callback(
    (func_dummy)do_search_callback, DO_SEARCH, user_data, key);
}
 
void yac_interp_method_check_get_do_search_callback(
  char const * key, func_do_search * do_search_callback, void ** user_data) {
 
  interp_method_get_callback(
    key, (func_dummy*)do_search_callback, DO_SEARCH, user_data);
}
 
void yac_interp_method_check_buf_free() {
 
  for (size_t i = 0; i < callback_lookup_table_size; ++i)
    free(callback_lookup_table[i].key);
  free(callback_lookup_table);
  callback_lookup_table = NULL;
  callback_lookup_table_array_size = 0;
  callback_lookup_table_size = 0;
}