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# gzip-like LZSS compressor
# Copyright (C) 2018 Pacien TRAN-GIRARD
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# 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. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <https://www.gnu.org/licenses/>.
import lists
# https://github.com/nim-lang/Nim/pull/9805
proc prepend*[T](L: var SinglyLinkedList[T], n: SinglyLinkedNode[T]) =
## prepends a node to `L`. Efficiency: O(1).
n.next = L.head
L.head = n
if L.tail == nil: L.tail = n
proc prepend*[T](L: var SinglyLinkedList[T], value: T) =
## prepends a node to `L`. Efficiency: O(1).
polyfill.prepend(L, newSinglyLinkedNode(value))
proc append*[T](L: var SinglyLinkedList[T], n: SinglyLinkedNode[T]) =
## appends a node `n` to `L`. Efficiency: O(1).
n.next = nil
if L.tail != nil:
assert(L.tail.next == nil)
L.tail.next = n
L.tail = n
if L.head == nil: L.head = n
proc append*[T](L: var SinglyLinkedList[T], value: T) =
## appends a value to `L`. Efficiency: O(1).
append(L, newSinglyLinkedNode(value))
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