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/*
* ========================
* ===== ===============
* ====== ================
* ====== ================
* ====== ==== ==== ==
* ====== === == = =
* ====== === = == =
* = === === = == ====
* = === === = == = =
* == ===== ==== ==
* ========================
*
* SPDX-License-Identifier: BSD-3-Clause
*
* Copyright (c) 2023-2024, Joe
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the organization nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ''AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
* hardflip: src/c_ldirs.go
* Thu Jan 11 18:35:31 2024
* Joe
*
* the directories linked list
*/
package main
type DirsNode struct {
Name string
Parent *DirsNode
Depth uint16
lhost *HostList
next *DirsNode
}
type DirsList struct {
head *DirsNode
last *DirsNode
}
// adds a directory node to the list
func (ldirs *DirsList) add_back(node *DirsNode) {
if ldirs.head == nil {
ldirs.head = node
ldirs.last = ldirs.head
return
}
last := ldirs.last
last.next = node
ldirs.last = last.next
}
// removes a dir node from the list
func (ldirs *DirsList) del(dir *DirsNode) {
if ldirs.head == nil {
return
}
if ldirs.head == dir {
ldirs.head = ldirs.head.next
if ldirs.head == nil {
ldirs.last = nil
return
}
return
}
if ldirs.last == dir {
ptr := ldirs.head
for ptr.next != nil {
ptr = ptr.next
}
ldirs.last = ptr
ldirs.last.next = nil
return
}
ptr := ldirs.head
for ptr.next != nil && ptr.next != dir {
ptr = ptr.next
}
if ptr.next == dir {
ptr.next = ptr.next.next
}
}
// returns a string with the full path of the dir
func (dir *DirsNode) path() string {
var path string
if dir == nil {
return "/"
}
curr := dir
for curr != nil {
path = curr.Name + "/" + path
curr = curr.Parent
}
return path
}
func (ldirs *DirsList) prev(dir *DirsNode) *DirsNode {
if ldirs.head == dir {
return dir
}
for ptr := ldirs.head; ptr != nil; ptr = ptr.next {
if ptr.next == dir {
return ptr
}
}
return nil
}
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