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//
// FileReader.swift
// PrySDR
//
// Created by Jacky Jack on 06/01/2025.
//
import Foundation
enum FileReaderError: Error {
case noFile
case readError
case noData
case seekError
}
class FileReader {
var filepath: String?
let filemgr = FileManager.default
var fileHandle: FileHandle?
init() {
}
func open(filename: String) throws {
let dir = getCurrentExecutableDir()
print(dir+"/"+filename)
if !filemgr.fileExists(atPath: filename) {
print("Cant find file \(filename)")
throw FileReaderError.noFile
}
fileHandle = FileHandle(forReadingAtPath: dir+"/"+filename)
if (fileHandle == nil) {
print("FileHandler failed")
}
}
func readBuffer(_ count: Int) -> [UInt8] {
print("FileReader not implemented")
return []
}
func readBuffer(_ count: Int) -> [Int8] {
print("FileReader not implemented")
return []
}
func readBuffer(_ count: Int) -> [UInt16] {
print("FileReader not implemented")
return []
}
func readBuffer(_ count: Int) -> [Int16] {
print("FileReader not implemented")
return []
}
func readBuffer(_ count: Int) -> [Float] {
print("FileReader not implemented")
return []
}
func readAllUInt8() throws -> [UInt8] {
var ret_arr:[UInt8]? = nil
if let file = fileHandle {
do {
if let databuf = try file.readToEnd() {
//print("read \(databuf.count) \(databuf) bytes")
//let temp_arr = [Int8](databuf)
ret_arr = [UInt8](repeating: 0, count: databuf.count)
for i in 0..<ret_arr!.count {
//print(String(format:"%02X", databuf[i]),terminator: "")
//convert from 0..255 to -127..128, from UInt8->Int8
ret_arr![i] = databuf[i]
}
}
} catch {
print("ReadAll u8 error:\(error)")
throw FileReaderError.readError
}
}
if ret_arr == nil {
return []
} else {
return ret_arr!
}
}
func readAllInt8() throws -> [Int8] {
var ret_arr:[Int8]? = nil
if let file = fileHandle {
do {
if let databuf = try file.readToEnd() {
//print("read \(databuf.count) \(databuf) bytes")
//let temp_arr = [Int8](databuf)
ret_arr = [Int8](repeating: 0, count: databuf.count)
for i in 0..<ret_arr!.count {
//print(String(format:"%02X", databuf[i]),terminator: "")
//convert from 0..255 to -127..128, from UInt8->Int8
let val = databuf[i]
if val <= 127 {
ret_arr![i] = Int8(val)-127
} else {
ret_arr![i] = Int8(val-128)
}
//print(String(format:"%02X", i8_arr![i]),terminator: "")
}
}
} catch {
print("ReadAll i8 error:\(error)")
throw FileReaderError.readError
}
}
if ret_arr == nil {
return []
} else {
return ret_arr!
}
}
//https://forums.swift.org/t/swift-5-read-binary-file-problem-with-unsafe-mutable-pointers/31048/6
func readAllInt16() throws -> [Int16] {
var ret_arr:[Int16]? = nil
if let file = fileHandle {
do {
if let databuf = try file.readToEnd() {
ret_arr = [Int16](asInt16(databuf))
}
print(ret_arr![0],ret_arr![1],ret_arr![2],ret_arr![3])
} catch {
print("ReadAll i8 error:\(error)")
throw FileReaderError.readError
}
}
if ret_arr == nil {
return []
} else {
return ret_arr!
}
}
func readAllUInt16() throws -> [UInt16] {
var ret_arr:[UInt16]? = nil
if let file = fileHandle {
do {
if let databuf = try file.readToEnd() {
ret_arr = [UInt16](asUInt16(databuf))
}
} catch {
print("ReadAll i8 error:\(error)")
throw FileReaderError.readError
}
}
if ret_arr == nil {
return []
} else {
return ret_arr!
}
}
func readAll() throws -> [Float] {
print("FileReader not implemented")
return []
}
func seek(toFileOffset: UInt64) throws {
if let file = self.fileHandle {
file.seek(toFileOffset: toFileOffset)
}
}
func close() {
fileHandle?.closeFile()
}
}
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