github.com/ontio/ontology@v1.14.4/vm/neovm/types/array_value.go (about)

     1  /*
     2   * Copyright (C) 2018 The ontology Authors
     3   * This file is part of The ontology library.
     4   *
     5   * The ontology is free software: you can redistribute it and/or modify
     6   * it under the terms of the GNU Lesser General Public License as published by
     7   * the Free Software Foundation, either version 3 of the License, or
     8   * (at your option) any later version.
     9   *
    10   * The ontology is distributed in the hope that it will be useful,
    11   * but WITHOUT ANY WARRANTY; without even the implied warranty of
    12   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    13   * GNU Lesser General Public License for more details.
    14   *
    15   * You should have received a copy of the GNU Lesser General Public License
    16   * along with The ontology.  If not, see <http://www.gnu.org/licenses/>.
    17   */
    18  
    19  package types
    20  
    21  import (
    22  	"github.com/ontio/ontology/vm/neovm/constants"
    23  	"github.com/ontio/ontology/vm/neovm/errors"
    24  )
    25  
    26  type ArrayValue struct {
    27  	Data []VmValue
    28  }
    29  
    30  const initArraySize = 16
    31  
    32  func NewArrayValue() *ArrayValue {
    33  	return &ArrayValue{Data: make([]VmValue, 0, initArraySize)}
    34  }
    35  
    36  func (self *ArrayValue) Append(item VmValue) error {
    37  	if len(self.Data) >= constants.MAX_ARRAY_SIZE {
    38  		return errors.ERR_OVER_MAX_ARRAY_SIZE
    39  	}
    40  	self.Data = append(self.Data, item)
    41  	return nil
    42  }
    43  
    44  func (self *ArrayValue) Len() int64 {
    45  	return int64(len(self.Data))
    46  }
    47  
    48  func (self *ArrayValue) RemoveAt(index int64) error {
    49  	if index < 0 || index >= self.Len() {
    50  		return errors.ERR_INDEX_OUT_OF_BOUND
    51  	}
    52  	self.Data = append(self.Data[:index], self.Data[index+1:]...)
    53  	return nil
    54  }