kc3-lang/gnulib/tests/test-hash_map.c

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• Hash : 7b089321
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  Date : 2025-01-01T09:24:36
  

  maint: run 'make update-copyright'
  

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• tests/test-hash_map.c

• /* Test of map data type implementation.
     Copyright (C) 2006-2025 Free Software Foundation, Inc.
     Written by Bruno Haible <bruno@clisp.org>, 2018.
  
     This program is free software: you can redistribute it and/or modify
     it under the terms of the GNU General Public License as published by
     the Free Software Foundation, either version 3 of the License, or
     (at your option) any later version.
  
     This program is distributed in the hope that it will be useful,
     but WITHOUT ANY WARRANTY; without even the implied warranty of
     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
     GNU General Public License for more details.
  
     You should have received a copy of the GNU General Public License
     along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  #include "gl_hash_map.h"
  
  #include <limits.h>
  #include <stdlib.h>
  #include <string.h>
  
  #include "gl_array_map.h"
  #include "xalloc.h"
  #include "macros.h"
  
  static const char *objects[30] =
    {
      "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o",
      "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z", "<", ">", "[", "]"
    };
  
  #define SIZE_BITS (sizeof (size_t) * CHAR_BIT)
  
  static bool
  string_equals (const void *x1, const void *x2)
  {
    const char *s1 = x1;
    const char *s2 = x2;
    return strcmp (s1, s2) == 0;
  }
  
  /* A hash function for NUL-terminated char* strings using
     the method described by Bruno Haible.
     See https://www.haible.de/bruno/hashfunc.html.  */
  static size_t
  string_hash (const void *x)
  {
    const char *s = x;
    size_t h = 0;
  
    for (; *s; s++)
      h = *s + ((h << 9) | (h >> (SIZE_BITS - 9)));
  
    return h;
  }
  
  #define RANDOM(n) (rand () % (n))
  #define RANDOM_OBJECT() objects[RANDOM (SIZEOF (objects))]
  
  struct pair
  {
    const void *key;
    const void *value;
  };
  
  static int
  cmp_pairs_in_array (const void *pairptr1, const void *pairptr2)
  {
    const void *key1 = ((struct pair const *)pairptr1)->key;
    const void *key2 = ((struct pair const *)pairptr2)->key;
    return strcmp ((const char *) key1, (const char *) key2);
  }
  
  static void
  check_equals (gl_map_t map1, gl_map_t map2)
  {
    size_t n = gl_map_size (map1);
    struct pair *pairs_of_map1 = XNMALLOC (n, struct pair);
    struct pair *pairs_of_map2 = XNMALLOC (n, struct pair);
  
    gl_map_iterator_t iter1, iter2;
    const void *key1;
    const void *value1;
    const void *key2;
    const void *value2;
    size_t i;
  
    iter1 = gl_map_iterator (map1);
    iter2 = gl_map_iterator (map2);
    for (i = 0; i < n; i++)
      {
        ASSERT (gl_map_iterator_next (&iter1, &key1, &value1));
        ASSERT (gl_map_iterator_next (&iter2, &key2, &value2));
        pairs_of_map1[i].key = key1;
        pairs_of_map1[i].value = value1;
        pairs_of_map2[i].key = key2;
        pairs_of_map2[i].value = value2;
      }
    ASSERT (!gl_map_iterator_next (&iter1, &key1, &value1));
    ASSERT (!gl_map_iterator_next (&iter2, &key2, &value2));
    gl_map_iterator_free (&iter1);
    gl_map_iterator_free (&iter2);
  
    if (n > 0)
      {
        qsort (pairs_of_map1, n, sizeof (struct pair), cmp_pairs_in_array);
        qsort (pairs_of_map2, n, sizeof (struct pair), cmp_pairs_in_array);
      }
    for (i = 0; i < n; i++)
      {
        ASSERT (pairs_of_map1[i].key == pairs_of_map2[i].key);
        ASSERT (pairs_of_map1[i].value == pairs_of_map2[i].value);
      }
    free (pairs_of_map2);
    free (pairs_of_map1);
  }
  
  static void
  check_all (gl_map_t map1, gl_map_t map2)
  {
    check_equals (map1, map2);
  }
  
  int
  main (int argc, char *argv[])
  {
    gl_map_t map1, map2;
  
    /* Allow the user to provide a non-default random seed on the command line.  */
    if (argc > 1)
      srand (atoi (argv[1]));
  
    {
      size_t initial_size = RANDOM (20);
      size_t i;
      unsigned int repeat;
  
      /* Create map1.  */
      map1 = gl_map_nx_create_empty (GL_ARRAY_MAP,
                                     string_equals, string_hash, NULL, NULL);
      ASSERT (map1 != NULL);
  
      /* Create map2.  */
      map2 = gl_map_nx_create_empty (GL_HASH_MAP,
                                     string_equals, string_hash, NULL, NULL);
      ASSERT (map2 != NULL);
  
      check_all (map1, map2);
  
      /* Initialize them.  */
      for (i = 0; i < initial_size; i++)
        {
          const char *key = RANDOM_OBJECT ();
          const char *value = RANDOM_OBJECT ();
          ASSERT (gl_map_nx_put (map1, key, value) == gl_map_nx_put (map2, key, value));
          check_all (map1, map2);
        }
  
      for (repeat = 0; repeat < 100000; repeat++)
        {
          unsigned int operation = RANDOM (3);
          switch (operation)
            {
            case 0:
              {
                const char *key = RANDOM_OBJECT ();
                ASSERT (gl_map_get (map1, key) == gl_map_get (map2, key));
              }
              break;
            case 1:
              {
                const char *key = RANDOM_OBJECT ();
                const char *value = RANDOM_OBJECT ();
                ASSERT (gl_map_nx_put (map1, key, value) == gl_map_nx_put (map2, key, value));
              }
              break;
            case 2:
              {
                const char *key = RANDOM_OBJECT ();
                ASSERT (gl_map_remove (map1, key) == gl_map_remove (map2, key));
              }
              break;
            }
          check_all (map1, map2);
        }
  
      gl_map_free (map1);
      gl_map_free (map2);
    }
  
    return test_exit_status;
  }
  

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