mirror of
git://jb55.com/damus
synced 2024-09-30 00:40:45 +00:00
59 lines
1.2 KiB
Swift
59 lines
1.2 KiB
Swift
//
|
|
// NdbTagIterators.swift
|
|
// damus
|
|
//
|
|
// Created by William Casarin on 2023-07-21.
|
|
//
|
|
|
|
import Foundation
|
|
|
|
struct TagSequence: Sequence {
|
|
let note: NdbNote
|
|
let tag: UnsafeMutablePointer<ndb_tag>
|
|
|
|
var count: UInt16 {
|
|
tag.pointee.count
|
|
}
|
|
|
|
func strings() -> [String] {
|
|
return self.map { $0.string() }
|
|
}
|
|
|
|
subscript(index: Int) -> NdbTagElem {
|
|
precondition(index < count, "Index out of bounds")
|
|
|
|
return NdbTagElem(note: note, tag: tag, index: Int32(index))
|
|
}
|
|
|
|
func makeIterator() -> TagIterator {
|
|
return TagIterator(note: note, tag: tag)
|
|
}
|
|
}
|
|
|
|
struct TagIterator: IteratorProtocol {
|
|
typealias Element = NdbTagElem
|
|
|
|
mutating func next() -> NdbTagElem? {
|
|
guard index < tag.pointee.count else { return nil }
|
|
let el = NdbTagElem(note: note, tag: tag, index: index)
|
|
|
|
index += 1
|
|
|
|
return el
|
|
}
|
|
|
|
var index: Int32
|
|
let note: NdbNote
|
|
var tag: UnsafeMutablePointer<ndb_tag>
|
|
|
|
var count: UInt16 {
|
|
tag.pointee.count
|
|
}
|
|
|
|
init(note: NdbNote, tag: UnsafeMutablePointer<ndb_tag>) {
|
|
self.note = note
|
|
self.tag = tag
|
|
self.index = 0
|
|
}
|
|
}
|