/*
 * 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 "os.h"

#include "ttype.h"
#include "ttokendef.h"
#include "tscompression.h"

const int32_t TYPE_BYTES[15] = {
    -1,                      // TSDB_DATA_TYPE_NULL
    sizeof(int8_t),          // TSDB_DATA_TYPE_BOOL
    sizeof(int8_t),          // TSDB_DATA_TYPE_TINYINT
    sizeof(int16_t),         // TSDB_DATA_TYPE_SMALLINT
    sizeof(int32_t),         // TSDB_DATA_TYPE_INT
    sizeof(int64_t),         // TSDB_DATA_TYPE_BIGINT
    sizeof(float),           // TSDB_DATA_TYPE_FLOAT
    sizeof(double),          // TSDB_DATA_TYPE_DOUBLE
    sizeof(VarDataOffsetT),  // TSDB_DATA_TYPE_BINARY
    sizeof(TSKEY),           // TSDB_DATA_TYPE_TIMESTAMP
    sizeof(VarDataOffsetT),  // TSDB_DATA_TYPE_NCHAR
    sizeof(uint8_t),         // TSDB_DATA_TYPE_UTINYINT
    sizeof(uint16_t),        // TSDB_DATA_TYPE_USMALLINT
    sizeof(uint32_t),        // TSDB_DATA_TYPE_UINT
    sizeof(uint64_t),        // TSDB_DATA_TYPE_UBIGINT
};

#define DO_STATICS(__sum, __min, __max, __minIndex, __maxIndex, _list, _index) \
  do {                                                                         \
    if (_list[(_index)] >= (INT64_MAX - (__sum))) {                            \
      __sum = INT64_MAX;                                                       \
    } else {                                                                   \
      (__sum) += (_list)[(_index)];                                            \
    }                                                                          \
    if ((__min) > (_list)[(_index)]) {                                         \
      (__min) = (_list)[(_index)];                                             \
      (__minIndex) = (_index);                                                 \
    }                                                                          \
                                                                               \
    if ((__max) < (_list)[(_index)]) {                                         \
      (__max) = (_list)[(_index)];                                             \
      (__maxIndex) = (_index);                                                 \
    }                                                                          \
  } while (0)

static void getStatics_bool(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max,
                            int64_t *sum, int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  int8_t *data = (int8_t *)pData;
  *min = INT64_MAX;
  *max = INT64_MIN;
  *minIndex = 0;
  *maxIndex = 0;
  
  ASSERT(numOfRow <= INT16_MAX);
  
  for (int32_t i = 0; i < numOfRow; ++i) {
    if (data[i] == TSDB_DATA_BOOL_NULL) {
      (*numOfNull) += 1;
      continue;
    }

    DO_STATICS(*sum, *min, *max, *minIndex, *maxIndex, data, i);
  }
}

static void getStatics_i8(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max, int64_t *sum,
                          int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  int8_t *data = (int8_t *)pData;
  *min = INT64_MAX;
  *max = INT64_MIN;
  *minIndex = 0;
  *maxIndex = 0;
  
  ASSERT(numOfRow <= INT16_MAX);
  
  for (int32_t i = 0; i < numOfRow; ++i) {
    if (((uint8_t)data[i]) == TSDB_DATA_TINYINT_NULL) {
      (*numOfNull) += 1;
      continue;
    }

    DO_STATICS(*sum, *min, *max, *minIndex, *maxIndex, data, i);
  }
}

static void getStatics_u8(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max, int64_t *sum,
                          int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  uint8_t *data = (uint8_t *)pData;
  uint64_t _min = UINT64_MAX;
  uint64_t _max = 0;
  uint64_t _sum = 0;

  *minIndex = 0;
  *maxIndex = 0;

  ASSERT(numOfRow <= INT16_MAX);

  for (int32_t i = 0; i < numOfRow; ++i) {
    if (((uint8_t)data[i]) == TSDB_DATA_UTINYINT_NULL) {
      (*numOfNull) += 1;
      continue;
    }

    DO_STATICS(_sum, _min, _max, *minIndex, *maxIndex, data, i);
  }

  *min = _min;
  *max = _max;
  *sum = _sum;
}

static void getStatics_i16(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max, int64_t *sum,
                           int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  int16_t *data = (int16_t *)pData;
  *min = INT64_MAX;
  *max = INT64_MIN;
  *minIndex = 0;
  *maxIndex = 0;
  
  ASSERT(numOfRow <= INT16_MAX);
  
  for (int32_t i = 0; i < numOfRow; ++i) {
    if (((uint16_t)data[i]) == TSDB_DATA_SMALLINT_NULL) {
      (*numOfNull) += 1;
      continue;
    }

    DO_STATICS(*sum, *min, *max, *minIndex, *maxIndex, data, i);
  }

}

static void getStatics_u16(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max, int64_t *sum,
                           int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  uint16_t *data = (uint16_t *)pData;
  uint64_t _min = UINT64_MAX;
  uint64_t _max = 0;
  uint64_t _sum = 0;

  *minIndex = 0;
  *maxIndex = 0;

  ASSERT(numOfRow <= INT16_MAX);

  for (int32_t i = 0; i < numOfRow; ++i) {
    if (((uint16_t)data[i]) == TSDB_DATA_USMALLINT_NULL) {
      (*numOfNull) += 1;
      continue;
    }

    DO_STATICS(_sum, _min, _max, *minIndex, *maxIndex, data, i);
  }

  *min = _min;
  *max = _max;
  *sum = _sum;
}

static void getStatics_i32(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max, int64_t *sum,
                           int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  int32_t *data = (int32_t *)pData;
  *min = INT64_MAX;
  *max = INT64_MIN;
  *minIndex = 0;
  *maxIndex = 0;
  
  ASSERT(numOfRow <= INT16_MAX);
  
  for (int32_t i = 0; i < numOfRow; ++i) {
    if (((uint32_t)data[i]) == TSDB_DATA_INT_NULL) {
      (*numOfNull) += 1;
      continue;
    }

    DO_STATICS(*sum, *min, *max, *minIndex, *maxIndex, data, i);
  }
}

static void getStatics_u32(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max,
                           int64_t *sum, int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  uint32_t *data = (uint32_t *)pData;
  uint64_t _min = UINT64_MAX;
  uint64_t _max = 0;
  uint64_t _sum = 0;

  *minIndex = 0;
  *maxIndex = 0;

  ASSERT(numOfRow <= INT16_MAX);

  for (int32_t i = 0; i < numOfRow; ++i) {
    if (((uint32_t)data[i]) == TSDB_DATA_UINT_NULL) {
      (*numOfNull) += 1;
      continue;
    }

    DO_STATICS(_sum, _min, _max, *minIndex, *maxIndex, data, i);
  }

  *min = _min;
  *max = _max;
  *sum = _sum;
}

static void getStatics_i64(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max,
                           int64_t *sum, int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  int64_t *data = (int64_t *)pData;
  *min = INT64_MAX;
  *max = INT64_MIN;
  *minIndex = 0;
  *maxIndex = 0;
  
  ASSERT(numOfRow <= INT16_MAX);
  
  for (int32_t i = 0; i < numOfRow; ++i) {
    if (((uint64_t)data[i]) == TSDB_DATA_BIGINT_NULL) {
      (*numOfNull) += 1;
      continue;
    }

    DO_STATICS(*sum, *min, *max, *minIndex, *maxIndex, data, i);
  }
}

static void getStatics_u64(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max,
                           int64_t *sum, int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  uint64_t *data = (uint64_t *)pData;
  uint64_t _min = UINT64_MAX;
  uint64_t _max = 0;
  uint64_t _sum = 0;

  *minIndex = 0;
  *maxIndex = 0;

  ASSERT(numOfRow <= INT16_MAX);

  for (int32_t i = 0; i < numOfRow; ++i) {
    if (((uint64_t)data[i]) == TSDB_DATA_UBIGINT_NULL) {
      (*numOfNull) += 1;
      continue;
    }

    DO_STATICS(_sum, _min, _max, *minIndex, *maxIndex, data, i);
  }

  *min = _min;
  *max = _max;
  *sum = _sum;
}

static void getStatics_f(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max,
                         int64_t *sum, int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  float *data  = (float *)pData;
  float fmin   = FLT_MAX;
  float fmax   = -FLT_MAX;
  double dsum  = 0;
  *minIndex    = 0;
  *maxIndex    = 0;
  
  ASSERT(numOfRow <= INT16_MAX);
  
  for (int32_t i = 0; i < numOfRow; ++i) {
    if ((*(uint32_t*)&(data[i])) == TSDB_DATA_FLOAT_NULL) {
      (*numOfNull) += 1;
      continue;
    }

    float fv = GET_FLOAT_VAL((const char*)&(data[i]));

    dsum += fv;
    if (fmin > fv) {
      fmin = fv;
      *minIndex = i;
    }
    
    if (fmax < fv) {
      fmax = fv;
      *maxIndex = i;
    }
  }
  
  SET_DOUBLE_VAL(sum, dsum);
  SET_DOUBLE_VAL(max, fmax);
  SET_DOUBLE_VAL(min, fmin);
}

static void getStatics_d(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max,
                         int64_t *sum, int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  double *data = (double *)pData;
  double dmin  = DBL_MAX;
  double dmax  = -DBL_MAX;
  double dsum  = 0;
  *minIndex    = 0;
  *maxIndex    = 0;
  
  ASSERT(numOfRow <= INT16_MAX);
  
  for (int32_t i = 0; i < numOfRow; ++i) {
    if ((*(uint64_t*)&(data[i])) == TSDB_DATA_DOUBLE_NULL) {
      (*numOfNull) += 1;
      continue;
    }
    
    double dv = 0;
    dv = GET_DOUBLE_VAL((const char*)&(data[i]));
    dsum += dv;
    if (dmin > dv) {
      dmin = dv;
      *minIndex = i;
    }
    
    if (dmax < dv) {
      dmax = dv;
      *maxIndex = i;
    }
  }
  
  SET_DOUBLE_PTR(sum, &dsum);
  SET_DOUBLE_PTR(max, &dmax);
  SET_DOUBLE_PTR(min, &dmin);
}

static void getStatics_bin(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max,
                         int64_t *sum, int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  const char* data = pData;
  ASSERT(numOfRow <= INT16_MAX);
  
  for (int32_t i = 0; i < numOfRow; ++i) {
    if (isNull(data, TSDB_DATA_TYPE_BINARY)) {
      (*numOfNull) += 1;
    }
    
    data += varDataTLen(data);
  }
  
  *sum = 0;
  *max = 0;
  *min = 0;
  *minIndex = 0;
  *maxIndex = 0;
}

static void getStatics_nchr(const void *pData, int32_t numOfRow, int64_t *min, int64_t *max,
                           int64_t *sum, int16_t *minIndex, int16_t *maxIndex, int16_t *numOfNull) {
  const char* data = pData;
  ASSERT(numOfRow <= INT16_MAX);
  
  for (int32_t i = 0; i < numOfRow; ++i) {
    if (isNull(data, TSDB_DATA_TYPE_NCHAR)) {
      (*numOfNull) += 1;
    }
    
    data += varDataTLen(data);
  }
  
  *sum = 0;
  *max = 0;
  *min = 0;
  *minIndex = 0;
  *maxIndex = 0;
}

tDataTypeDescriptor tDataTypes[15] = {
  {TSDB_DATA_TYPE_NULL,      6,1,        "NOTYPE",   NULL,     NULL,      NULL},
  {TSDB_DATA_TYPE_BOOL,      4,  CHAR_BYTES,   "BOOL",               tsCompressBool,      tsDecompressBool,      getStatics_bool},
  {TSDB_DATA_TYPE_TINYINT,   7,  CHAR_BYTES,   "TINYINT",            tsCompressTinyint,   tsDecompressTinyint,   getStatics_i8},
  {TSDB_DATA_TYPE_SMALLINT,  8,  SHORT_BYTES,  "SMALLINT",           tsCompressSmallint,  tsDecompressSmallint,  getStatics_i16},
  {TSDB_DATA_TYPE_INT,       3,  INT_BYTES,    "INT",                tsCompressInt,       tsDecompressInt,       getStatics_i32},
  {TSDB_DATA_TYPE_BIGINT,    6,  LONG_BYTES,   "BIGINT",             tsCompressBigint,    tsDecompressBigint,    getStatics_i64},
  {TSDB_DATA_TYPE_FLOAT,     5,  FLOAT_BYTES,  "FLOAT",              tsCompressFloat,     tsDecompressFloat,     getStatics_f},
  {TSDB_DATA_TYPE_DOUBLE,    6,  DOUBLE_BYTES, "DOUBLE",             tsCompressDouble,    tsDecompressDouble,    getStatics_d},
  {TSDB_DATA_TYPE_BINARY,    6,  0,      "BINARY",             tsCompressString,    tsDecompressString,    getStatics_bin},
  {TSDB_DATA_TYPE_TIMESTAMP, 9,  LONG_BYTES,   "TIMESTAMP",          tsCompressTimestamp, tsDecompressTimestamp, getStatics_i64},
  {TSDB_DATA_TYPE_NCHAR,     5,  8,      "NCHAR",              tsCompressString,    tsDecompressString,    getStatics_nchr},
  {TSDB_DATA_TYPE_UTINYINT,  16, CHAR_BYTES,   "TINYINT UNSIGNED",   tsCompressTinyint,   tsDecompressTinyint,   getStatics_u8},
  {TSDB_DATA_TYPE_USMALLINT, 17, SHORT_BYTES,  "SMALLINT UNSIGNED",  tsCompressSmallint,  tsDecompressSmallint,  getStatics_u16},
  {TSDB_DATA_TYPE_UINT,      12, INT_BYTES,    "INT UNSIGNED",       tsCompressInt,       tsDecompressInt,       getStatics_u32},
  {TSDB_DATA_TYPE_UBIGINT,   15, LONG_BYTES,   "BIGINT UNSIGNED",    tsCompressBigint,    tsDecompressBigint,    getStatics_u64},
};

char tTokenTypeSwitcher[13] = {
    TSDB_DATA_TYPE_NULL,    // no type
    TSDB_DATA_TYPE_BINARY,  // TK_ID
    TSDB_DATA_TYPE_BOOL,    // TK_BOOL
    TSDB_DATA_TYPE_BIGINT,  // TK_TINYINT
    TSDB_DATA_TYPE_BIGINT,  // TK_SMALLINT
    TSDB_DATA_TYPE_BIGINT,  // TK_INTEGER
    TSDB_DATA_TYPE_BIGINT,  // TK_BIGINT
    TSDB_DATA_TYPE_DOUBLE,  // TK_FLOAT
    TSDB_DATA_TYPE_DOUBLE,  // TK_DOUBLE
    TSDB_DATA_TYPE_BINARY,  // TK_STRING
    TSDB_DATA_TYPE_BIGINT,  // TK_TIMESTAMP
    TSDB_DATA_TYPE_BINARY,  // TK_BINARY
    TSDB_DATA_TYPE_NCHAR,   // TK_NCHAR
};

bool isValidDataType(int32_t type) {
  return type >= TSDB_DATA_TYPE_NULL && type <= TSDB_DATA_TYPE_UBIGINT;
}

void setVardataNull(void* val, int32_t type) {
  if (type == TSDB_DATA_TYPE_BINARY) {
    varDataSetLen(val, sizeof(int8_t));
    *(uint8_t*) varDataVal(val) = TSDB_DATA_BINARY_NULL;
  } else if (type == TSDB_DATA_TYPE_NCHAR) {
    varDataSetLen(val, sizeof(int32_t));
    *(uint32_t*) varDataVal(val) = TSDB_DATA_NCHAR_NULL;
  } else {
    assert(0);
  }
}

void setNull(void *val, int32_t type, int32_t bytes) { setNullN(val, type, bytes, 1); }

void setNullN(void *val, int32_t type, int32_t bytes, int32_t numOfElems) {
  switch (type) {
    case TSDB_DATA_TYPE_BOOL:
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint8_t *)(POINTER_SHIFT(val, i * tDataTypes[type].bytes)) = TSDB_DATA_BOOL_NULL;
      }
      break;
    case TSDB_DATA_TYPE_TINYINT:
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint8_t *)(POINTER_SHIFT(val, i * tDataTypes[type].bytes)) = TSDB_DATA_TINYINT_NULL;
      }
      break;
    case TSDB_DATA_TYPE_SMALLINT:
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint16_t *)(POINTER_SHIFT(val, i * tDataTypes[type].bytes)) = TSDB_DATA_SMALLINT_NULL;
      }
      break;
    case TSDB_DATA_TYPE_INT:
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint32_t *)(POINTER_SHIFT(val, i * tDataTypes[type].bytes)) = TSDB_DATA_INT_NULL;
      }
      break;
    case TSDB_DATA_TYPE_BIGINT:
    case TSDB_DATA_TYPE_TIMESTAMP:
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint64_t *)(POINTER_SHIFT(val, i * tDataTypes[type].bytes)) = TSDB_DATA_BIGINT_NULL;
      }
      break;
    case TSDB_DATA_TYPE_UTINYINT:
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint8_t *)(POINTER_SHIFT(val, i * tDataTypes[type].bytes)) = TSDB_DATA_UTINYINT_NULL;
      }
      break;
    case TSDB_DATA_TYPE_USMALLINT:
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint16_t *)(POINTER_SHIFT(val, i * tDataTypes[type].bytes)) = TSDB_DATA_USMALLINT_NULL;
      }
      break;
    case TSDB_DATA_TYPE_UINT:
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint32_t *)(POINTER_SHIFT(val, i * tDataTypes[type].bytes)) = TSDB_DATA_UINT_NULL;
      }
      break;
    case TSDB_DATA_TYPE_UBIGINT:
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint64_t *)(POINTER_SHIFT(val, i * tDataTypes[type].bytes)) = TSDB_DATA_UBIGINT_NULL;
      }
      break;
    case TSDB_DATA_TYPE_FLOAT:
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint32_t *)(POINTER_SHIFT(val, i * tDataTypes[type].bytes)) = TSDB_DATA_FLOAT_NULL;
      }
      break;
    case TSDB_DATA_TYPE_DOUBLE:
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint64_t *)(POINTER_SHIFT(val, i * tDataTypes[type].bytes)) = TSDB_DATA_DOUBLE_NULL;
      }
      break;
    case TSDB_DATA_TYPE_NCHAR:
    case TSDB_DATA_TYPE_BINARY:
      for (int32_t i = 0; i < numOfElems; ++i) {
        setVardataNull(POINTER_SHIFT(val, i * bytes), type);
      }
      break;
    default: {
      for (int32_t i = 0; i < numOfElems; ++i) {
        *(uint32_t *)(POINTER_SHIFT(val, i * tDataTypes[TSDB_DATA_TYPE_INT].bytes)) = TSDB_DATA_INT_NULL;
      }
      break;
    }
  }
}

static uint8_t      nullBool = TSDB_DATA_BOOL_NULL;
static uint8_t      nullTinyInt = TSDB_DATA_TINYINT_NULL;
static uint16_t     nullSmallInt = TSDB_DATA_SMALLINT_NULL;
static uint32_t     nullInt = TSDB_DATA_INT_NULL;
static uint64_t     nullBigInt = TSDB_DATA_BIGINT_NULL;
static uint32_t     nullFloat = TSDB_DATA_FLOAT_NULL;
static uint64_t     nullDouble = TSDB_DATA_DOUBLE_NULL;
static uint8_t      nullTinyIntu = TSDB_DATA_UTINYINT_NULL;
static uint16_t     nullSmallIntu = TSDB_DATA_USMALLINT_NULL;
static uint32_t     nullIntu = TSDB_DATA_UINT_NULL;
static uint64_t     nullBigIntu = TSDB_DATA_UBIGINT_NULL;
static SBinaryNullT nullBinary = {1, TSDB_DATA_BINARY_NULL};
static SNCharNullT  nullNchar = {4, TSDB_DATA_NCHAR_NULL};

// static union {
//   tstr str;
//   char pad[sizeof(tstr) + 4];
// } nullBinary = {.str = {.len = 1}}, nullNchar = {.str = {.len = 4}};

static const void *nullValues[] = {
    &nullBool,     &nullTinyInt,   &nullSmallInt, &nullInt,    &nullBigInt,
    &nullFloat,    &nullDouble,    &nullBinary,   &nullBigInt, &nullNchar,
    &nullTinyIntu, &nullSmallIntu, &nullIntu,     &nullBigIntu,
};

const void *getNullValue(int32_t type) {
  assert(type >= TSDB_DATA_TYPE_BOOL && type <= TSDB_DATA_TYPE_UBIGINT);
  return nullValues[type - 1];
}

void assignVal(char *val, const char *src, int32_t len, int32_t type) {
  switch (type) {
    case TSDB_DATA_TYPE_BOOL:
    case TSDB_DATA_TYPE_TINYINT:
    case TSDB_DATA_TYPE_UTINYINT:
      *((int8_t *)val) = GET_INT8_VAL(src);
      break;
    case TSDB_DATA_TYPE_SMALLINT:
    case TSDB_DATA_TYPE_USMALLINT:
      *((int16_t *)val) = GET_INT16_VAL(src);
      break;
    case TSDB_DATA_TYPE_INT:
    case TSDB_DATA_TYPE_UINT:
      *((int32_t *)val) = GET_INT32_VAL(src);
      break;

    case TSDB_DATA_TYPE_FLOAT:
      SET_FLOAT_VAL(val, GET_FLOAT_VAL(src));
      break;
    case TSDB_DATA_TYPE_DOUBLE:
      SET_DOUBLE_VAL(val, GET_DOUBLE_VAL(src));
      break;
    case TSDB_DATA_TYPE_BIGINT:
    case TSDB_DATA_TYPE_UBIGINT:
    case TSDB_DATA_TYPE_TIMESTAMP:
      *((int64_t *)val) = GET_INT64_VAL(src);
      break;
    case TSDB_DATA_TYPE_BINARY:
      varDataCopy(val, src);
      break;
    case TSDB_DATA_TYPE_NCHAR:
      varDataCopy(val, src);
      break;
    default: {
      memcpy(val, src, len);
      break;
    }
  }
}

void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size, void* buf) {
  switch (type) {
    case TSDB_DATA_TYPE_INT:
    case TSDB_DATA_TYPE_UINT: {
      SWAP(*(int32_t *)(pLeft), *(int32_t *)(pRight), int32_t);
      break;
    }
    
    case TSDB_DATA_TYPE_BIGINT:
    case TSDB_DATA_TYPE_UBIGINT:
    case TSDB_DATA_TYPE_TIMESTAMP: {
      SWAP(*(int64_t *)(pLeft), *(int64_t *)(pRight), int64_t);
      break;
    }
    case TSDB_DATA_TYPE_DOUBLE: {
      SWAP(*(double *)(pLeft), *(double *)(pRight), double);
      break;
    }
    case TSDB_DATA_TYPE_SMALLINT:
    case TSDB_DATA_TYPE_USMALLINT: {
      SWAP(*(int16_t *)(pLeft), *(int16_t *)(pRight), int16_t);
      break;
    }
    
    case TSDB_DATA_TYPE_FLOAT: {
      SWAP(*(float *)(pLeft), *(float *)(pRight), float);
      break;
    }
    
    case TSDB_DATA_TYPE_BOOL:
    case TSDB_DATA_TYPE_TINYINT:
    case TSDB_DATA_TYPE_UTINYINT: {
      SWAP(*(int8_t *)(pLeft), *(int8_t *)(pRight), int8_t);
      break;
    }
    
    default: {
      memcpy(buf, pLeft, size);
      memcpy(pLeft, pRight, size);
      memcpy(pRight, buf, size);
      break;
    }
  }
}

int32_t tStrToInteger(const char* z, int16_t type, int32_t n, int64_t* value, bool issigned) {
  errno = 0;
  int32_t ret = 0;

  char* endPtr = NULL;
  if (type == TK_FLOAT) {
    double v = strtod(z, &endPtr);
    if ((errno == ERANGE && v == HUGE_VALF) || isinf(v) || isnan(v)) {
      ret = -1;
    } else if ((issigned && (v < INT64_MIN || v > INT64_MAX)) || ((!issigned) && (v < 0 || v > UINT64_MAX))) {
      ret = -1;
    } else {
      *value = (int64_t) round(v);
    }

    errno = 0;
    return ret;
  }

  int32_t radix = 10;
  if (type == TK_HEX) {
    radix = 16;
  } else if (type == TK_BIN) {
    radix = 2;
  }

  // the string may be overflow according to errno
  if (!issigned) {
    const char *p = z;
    while(*p != 0 && *p == ' ') p++;   
    if (*p != 0 && *p == '-') { return -1;}

    *value = strtoull(z, &endPtr, radix);
  } else {
    *value = strtoll(z, &endPtr, radix);
  }

  // not a valid integer number, return error
  if (endPtr - z != n || errno == ERANGE) {
    ret = -1;
  }

  errno = 0;
  return ret;
}
