indexComm.c

/*
 * 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/>.
 */

#include "index.h"
#include "indexInt.h"

char JSON_COLUMN[] = "JSON";
char JSON_VALUE_DELIM = '&';

char* indexPackJsonData(SIndexTerm* itm) {
  /*
   * |<-----colname---->|<-----dataType---->|<--------colVal---------->|
   * |<-----string----->|<-----uint8_t----->|<----depend on dataType-->|
   */
  uint8_t ty = INDEX_TYPE_GET_TYPE(itm->colType);

  int32_t sz = itm->nColName + itm->nColVal + sizeof(uint8_t) + sizeof(JSON_VALUE_DELIM) * 2 + 1;
  char*   buf = (char*)taosMemoryCalloc(1, sz);
  char*   p = buf;

  memcpy(p, itm->colName, itm->nColName);
  p += itm->nColName;

  memcpy(p, &JSON_VALUE_DELIM, sizeof(JSON_VALUE_DELIM));
  p += sizeof(JSON_VALUE_DELIM);

  memcpy(p, &ty, sizeof(ty));
  p += sizeof(ty);

  memcpy(p, &JSON_VALUE_DELIM, sizeof(JSON_VALUE_DELIM));
  p += sizeof(JSON_VALUE_DELIM);

  memcpy(p, itm->colVal, itm->nColVal);

  return buf;
}