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func_splice.go
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func_splice.go
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/*
* Copyright (C) 2018 The DNA Authors
* This file is part of The DNA library.
*
* The DNA is free software: you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* The DNA 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with The DNA. If not, see <http://www.gnu.org/licenses/>.
*/
package neovm
func opCat(e *ExecutionEngine) (VMState, error) {
b2, err := PopByteArray(e)
if err != nil {
return FAULT, err
}
b1, err := PopByteArray(e)
if err != nil {
return FAULT, err
}
r := Concat(b1, b2)
PushData(e, r)
return NONE, nil
}
func opSubStr(e *ExecutionEngine) (VMState, error) {
count, err := PopInt(e)
if err != nil {
return FAULT, err
}
index, err := PopInt(e)
if err != nil {
return FAULT, err
}
arr, err := PopByteArray(e)
if err != nil {
return FAULT, err
}
b := arr[index : index+count]
PushData(e, b)
return NONE, nil
}
func opLeft(e *ExecutionEngine) (VMState, error) {
count, err := PopInt(e)
if err != nil {
return FAULT, err
}
s, err := PopByteArray(e)
if err != nil {
return FAULT, err
}
b := s[:count]
PushData(e, b)
return NONE, nil
}
func opRight(e *ExecutionEngine) (VMState, error) {
count, err := PopInt(e)
if err != nil {
return FAULT, err
}
arr, err := PopByteArray(e)
if err != nil {
return FAULT, err
}
b := arr[len(arr)-count:]
PushData(e, b)
return NONE, nil
}
func opSize(e *ExecutionEngine) (VMState, error) {
b, err := PopByteArray(e)
if err != nil {
return FAULT, err
}
PushData(e, len(b))
return NONE, nil
}