/* Copyright (c) 2000, 2016, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License, version 2.0,
   as published by the Free Software Foundation.

   This program is also distributed with certain software (including
   but not limited to OpenSSL) that is licensed under separate terms,
   as designated in a particular file or component or in included license
   documentation.  The authors of MySQL hereby grant you an additional
   permission to link the program and your derivative works with the
   separately licensed software that they have included with MySQL.

   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, version 2.0, for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA */

/* Test of hash library: big test */

#include <my_global.h>
#include <my_sys.h>
#include <hash.h>
#include <m_string.h>

#define MAX_RECORDS 100000
#define MAX_KEYS 3

static int get_options(int argc, char *argv[]);
static int do_test();
static int rnd(int max_value);

static uint testflag=0,recant=10000,reclength=37;
static uint16 key1[1000];

#ifdef DBUG_OFF
#define hash_check(A) 0
#else
my_bool hash_check(HASH *hash);
#endif

void free_record(void *record);

static uchar *hash2_key(const uchar *rec,uint *length,
		       my_bool not_used MY_ATTRIBUTE((unused)))
{
  *length=(uint) (uchar) rec[reclength-1];
  return (uchar*) rec;
}

/* main program */

int main(int argc,char *argv[])
{
  MY_INIT(argv[0]);
  DBUG_PROCESS(argv[0]);

  get_options(argc,argv);

  exit(do_test());
}

static int do_test()
{
  uint i,j;
  uint n1,n2,n3;
  uint write_count,update,delete;
  ulong pos;
  unsigned long key_check;
  char *record,*recpos,oldrecord[120],key[10];
  HASH hash,hash2;
  DBUG_ENTER("do_test");

  write_count=update=delete=0;
  key_check=0;
  memset(key1, 0, sizeof(key1[0])*1000);

  printf("- Creating hash\n");
  if (hash_init(&hash, default_charset_info, recant/2, 0, 6, 0, free_record, 0))
    goto err;
  printf("- Writing records:\n");

  for (i=0 ; i < recant ; i++)
  {
    n1=rnd(1000); n2=rnd(100); n3=rnd(min(recant*5,MAX_RECORDS));
    record= (char*) my_malloc(reclength,MYF(MY_FAE));
    sprintf(record,"%6d:%4d:%8d:Pos: %4d      ",n1,n2,n3,write_count);
    if (my_hash_insert(&hash,record))
    {
      printf("Error: %d in write at record: %d\n",my_errno,i);
      goto err;
    }
    key1[n1]++;
    key_check+=n1;
    write_count++;
  }
  if (hash_check(&hash))
  {
    puts("Heap keys crashed");
    goto err;
  }
  printf("- Delete\n");
  for (i=0 ; i < write_count/10 ; i++)
  {
    for (j=rnd(1000) ; j>0 && key1[j] == 0 ; j--) ;
    if (j != 0)
    {
      sprintf(key,"%6d",j);
      if (!(recpos=hash_search(&hash,key,0)))
      {
	printf("can't find key1: \"%s\"\n",key);
	goto err;
      }
      key1[atoi(recpos)]--;
      key_check-=atoi(recpos);
      memcpy(oldrecord,recpos,reclength);
      if (hash_delete(&hash,recpos))
      {
	printf("error: %d; can't delete record: \"%s\"\n", my_errno,oldrecord);
	goto err;
      }
      delete++;
      if (testflag == 2 && hash_check(&hash))
      {
	puts("Heap keys crashed");
	goto err;
      }
    }
  }
  if (hash_check(&hash))
  {
    puts("Hash keys crashed");
    goto err;
  }

  printf("- Update\n");
  for (i=0 ; i < write_count/10 ; i++)
  {
    n1=rnd(1000); n2=rnd(100); n3=rnd(min(recant*2,MAX_RECORDS));
    for (j=rnd(1000) ; j>0 && key1[j] == 0 ; j--) ;
    if (j)
    {
      sprintf(key,"%6d",j);
      if (!(recpos=hash_search(&hash,key,0)))
      {
	printf("can't find key1: \"%s\"\n",key);
	goto err;
      }
      key1[atoi(recpos)]--;
      key_check=key_check-atoi(recpos)+n1;
      key1[n1]++;
      sprintf(recpos,"%6d:%4d:%8d:XXX: %4d      ",n1,n2,n3,update);
      update++;
      if (hash_update(&hash,recpos,key,0))
      {
	printf("can't update key1: \"%s\"\n",key);
	goto err;
      }
      if (testflag == 3 && hash_check(&hash))
      {
	printf("Heap keys crashed for %d update\n",update);
	goto err;
      }
    }
  }
  if (hash_check(&hash))
  {
    puts("Heap keys crashed");
    goto err;
  }

  for (j=0 ; j < 1000 ; j++)
    if (key1[j] > 1)
      break;
  if (key1[j] > 1)
  {
    HASH_SEARCH_STATE state;
    printf("- Testing identical read\n");
    sprintf(key,"%6d",j);
    pos=1;
    if (!(recpos= hash_first(&hash, key, 0, &state)))
    {
      printf("can't find key1: \"%s\"\n",key);
      goto err;
    }
    while (hash_next(&hash, key, 0, &state) && pos < (ulong) (key1[j]+10))
      pos++;
    if (pos != (ulong) key1[j])
    {
      printf("Found %ld copies of key: %s. Should be %d",pos,key,key1[j]);
      goto err;
    }
  }
  printf("- Creating output heap-file 2\n");
  if (hash_init(&hash2, default_charset_info, hash.records, 0, 0, hash2_key, free_record,0))
    goto err;

  printf("- Copying and removing records\n");
  pos=0;
  while ((recpos=hash_element(&hash,0)))
  {
    record=(uchar*) my_malloc(reclength,MYF(MY_FAE));
    memcpy(record,recpos,reclength);
    record[reclength-1]=rnd(5)+1;
    if (my_hash_insert(&hash2,record))
    {
      printf("Got error when inserting record: %*s",reclength,record);
      goto err;
    }
    key_check-=atoi(record);
    write_count++;
    if (hash_delete(&hash,recpos))
    {
      printf("Got error when deleting record: %*s",reclength,recpos);
      goto err;
    }
    if (testflag==4)
    {
      if (hash_check(&hash) || hash_check(&hash2))
      {
	puts("Hash keys crashed");
	goto err;
      }
    }
    pos++;
  }
  if (hash_check(&hash) || hash_check(&hash2))
  {
    puts("Hash keys crashed");
    goto err;
  }
  if (key_check != 0)
  {
    printf("Key check didn't get to 0 (%ld)\n",key_check);
  }

  printf("\nFollowing test have been made:\n");
  printf("Write records: %d\nUpdate records: %d\nDelete records: %d\n", write_count,
	 update,delete);
  hash_free(&hash); hash_free(&hash2);
  my_end(MY_GIVE_INFO);
  DBUG_RETURN(0);
err:
  printf("Got error: %d when using hashing\n",my_errno);
  DBUG_RETURN(-1);
} /* main */


/* read options */
/* NOTE! DBUG not initialised - no debugging here! */

static int get_options(int argc, char **argv)
{
  char *pos,*progname;

  progname= argv[0];

  while (--argc >0 && *(pos = *(++argv)) == '-' ) {
    switch(*++pos) {
    case 'm':				/* records */
      recant=atoi(++pos);
      break;
    case 't':
      testflag=atoi(++pos);		/* testmod */
      break;
    case 'V':
    case 'I':
    case '?':
      printf("%s  Ver 1.0 for %s at %s\n",progname,SYSTEM_TYPE,MACHINE_TYPE);
      printf("MySQL AB, by Monty\n\n");
      printf("Usage: %s [-?ABIKLWv] [-m#] [-t#]\n",progname);
      exit(0);
    case '#':
      DBUG_PUSH (++pos);
      break;
    }
  }
  return 0;
} /* get_options */


/* Get a random number in the interval 0 <= x <= n */

static int rnd(int max_value)
{
  return (int) ((rand() & 32767)/32767.0*max_value);
} /* rnd */


void free_record(void *record)
{
  my_free(record);
}
