78 lines
3.3 KiB
Swift
78 lines
3.3 KiB
Swift
internal import CPlaydate
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/// The cached `playdate->file` C API table.
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var fileAPI: UnsafePointer<playdate_file> { Playdate.fileAPI.unsafelyUnwrapped }
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/// The most recent file system error as a thrown error.
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func lastFileError() -> PlaydateError {
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PlaydateError(cString: fileAPI.pointee.geterr.unsafelyUnwrapped())
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}
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/// The file API: access to the game's Data directory and pdx contents.
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///
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/// Paths are relative to the game's Data directory (read/write) or the
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/// game's pdx (read-only), depending on the mode used to open them.
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public enum File {}
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extension File {
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// MARK: - Directory operations
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/// Calls `each` with the name of every file in `path`. Subdirectory names
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/// end in a slash. Throws if the directory does not exist.
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public static func listFiles(at path: String, showHidden: Bool = false,
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_ each: (String) -> Void) throws(PlaydateError) {
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let result = withoutActuallyEscaping(each) { each in
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var callback = each
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return path.withPlaydateCString { cPath in
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withUnsafeMutablePointer(to: &callback) { callbackPointer in
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fileAPI.pointee.listfiles.unsafelyUnwrapped(cPath, { cName, userdata in
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guard let cName, let userdata else { return }
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let each = userdata.assumingMemoryBound(to: ((String) -> Void).self).pointee
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each(String(playdateCString: cName))
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}, callbackPointer, showHidden ? 1 : 0)
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}
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}
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}
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if result != 0 { throw lastFileError() }
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}
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/// Information about the file or directory at `path`.
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public static func stat(_ path: String) throws(PlaydateError) -> Stat {
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var stat = FileStat()
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let result = path.withPlaydateCString { fileAPI.pointee.stat.unsafelyUnwrapped($0, &stat) }
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if result != 0 { throw lastFileError() }
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return Stat(
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isDirectory: stat.isdir != 0,
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size: stat.size,
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modified: System.DateTime(
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year: UInt16(stat.m_year), month: UInt8(stat.m_month), day: UInt8(stat.m_day),
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hour: UInt8(stat.m_hour), minute: UInt8(stat.m_minute), second: UInt8(stat.m_second)))
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}
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/// Creates a directory (and intermediate directories) in the Data directory.
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public static func mkdir(_ path: String) throws(PlaydateError) {
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let result = path.withPlaydateCString { fileAPI.pointee.mkdir.unsafelyUnwrapped($0) }
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if result != 0 { throw lastFileError() }
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}
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/// Deletes the file or directory at `path`. Directories require
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/// `recursive` to be deleted with their contents.
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public static func unlink(_ path: String, recursive: Bool = false) throws(PlaydateError) {
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let result = path.withPlaydateCString {
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fileAPI.pointee.unlink.unsafelyUnwrapped($0, recursive ? 1 : 0)
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}
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if result != 0 { throw lastFileError() }
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}
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/// Renames (moves) a file in the Data directory, overwriting any existing
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/// file at the destination.
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public static func rename(from: String, to: String) throws(PlaydateError) {
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let result = from.withPlaydateCString { cFrom in
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to.withPlaydateCString { cTo in
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fileAPI.pointee.rename.unsafelyUnwrapped(cFrom, cTo)
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}
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}
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if result != 0 { throw lastFileError() }
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}
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}
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