index_util.h

/*
 * Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
 *
 * This program is free software: you can use, redistribute, and/or modify
 * it under the terms of the GNU Affero General Public License, version 3
 * or later ("AGPL"), as published by the Free Software Foundation.
 *
 * 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.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
#ifndef __INDEX_UTIL_H__
#define __INDEX_UTIL_H__

#include "tarray.h"

#ifdef __cplusplus
extern "C" {
#endif

#define SERIALIZE_MEM_TO_BUF(buf, key, mem)                     \
  do {                                                          \
    memcpy((void *)buf, (void *)(&key->mem), sizeof(key->mem)); \
    buf += sizeof(key->mem);                                    \
  } while (0)

#define SERIALIZE_STR_MEM_TO_BUF(buf, key, mem, len) \
  do {                                               \
    memcpy((void *)buf, (void *)key->mem, len);      \
    buf += len;                                      \
  } while (0)

#define SERIALIZE_VAR_TO_BUF(buf, var, type)    \
  do {                                          \
    type c = var;                               \
    assert(sizeof(type) == sizeof(c));          \
    memcpy((void *)buf, (void *)&c, sizeof(c)); \
    buf += sizeof(c);                           \
  } while (0)

#define SERIALIZE_STR_VAR_TO_BUF(buf, var, len) \
  do {                                          \
    memcpy((void *)buf, (void *)var, len);      \
    buf += len;                                 \
  } while (0)

/* multi sorted result intersection
 * input: [1, 2, 4, 5]
 *        [2, 3, 4, 5]
 *        [1, 4, 5]
 * output:[4, 5]
 */
void iIntersection(SArray *interResults, SArray *finalResult);
void iUnion(SArray *interResults, SArray *finalResult);
#ifdef __cplusplus
}
#endif

#endif