// Return exit code, number of bits written
func (this *BlockDecompressor) call() (int, uint64) {
var msg string
printOut("Input file name set to '"+this.inputName+"'", this.verbose)
printOut("Output file name set to '"+this.outputName+"'", this.verbose)
msg = fmt.Sprintf("Verbose set to %t", this.verbose)
printOut(msg, this.verbose)
msg = fmt.Sprintf("Overwrite set to %t", this.overwrite)
printOut(msg, this.verbose)
prefix := ""
if this.jobs > 1 {
prefix = "s"
}
msg = fmt.Sprintf("Using %d job%s", this.jobs, prefix)
printOut(msg, this.verbose)
var output kanzi.OutputStream
if strings.ToUpper(this.outputName) == "NONE" {
output, _ = io.NewNullOutputStream()
} else {
var err error
output, err = os.OpenFile(this.outputName, os.O_RDWR, 666)
if err == nil {
// File exists
if this.overwrite == false {
fmt.Printf("The output file '%v' exists and the 'overwrite' command ", this.outputName)
fmt.Println("line option has not been provided")
output.Close()
return io.ERR_OVERWRITE_FILE, 0
}
} else {
// File does not exist, create
output, err = os.Create(this.outputName)
if err != nil {
fmt.Printf("Cannot open output file '%v' for writing: %v\n", this.outputName, err)
return io.ERR_CREATE_FILE, 0
}
}
}
defer output.Close()
// Decode
read := uint64(0)
printOut("Decoding ...", !this.silent)
input, err := os.Open(this.inputName)
if err != nil {
fmt.Printf("Cannot open input file '%v': %v\n", this.inputName, err)
return io.ERR_OPEN_FILE, read
}
defer input.Close()
verboseWriter := os.Stdout
if this.verbose == false {
verboseWriter = nil
}
bis, err := io.NewBufferedInputStream(input)
if err != nil {
fmt.Printf("Cannot create compressed stream: %v\n", err)
return io.ERR_CREATE_DECOMPRESSOR, read
}
cis, err := io.NewCompressedInputStream(bis, verboseWriter, this.jobs)
if err != nil {
if err.(*io.IOError) != nil {
fmt.Printf("%s\n", err.(*io.IOError).Message())
return err.(*io.IOError).ErrorCode(), read
} else {
fmt.Printf("Cannot create compressed stream: %v\n", err)
return io.ERR_CREATE_DECOMPRESSOR, read
}
}
for e := this.listeners.Front(); e != nil; e = e.Next() {
cis.AddListener(e.Value.(io.BlockListener))
}
buffer := make([]byte, DECOMP_DEFAULT_BUFFER_SIZE)
decoded := len(buffer)
before := time.Now()
// Decode next block
for decoded == len(buffer) {
if decoded, err = cis.Read(buffer); err != nil {
if ioerr, isIOErr := err.(*io.IOError); isIOErr == true {
fmt.Printf("%s\n", ioerr.Message())
return ioerr.ErrorCode(), read
} else {
fmt.Printf("An unexpected condition happened. Exiting ...\n%v\n", err)
return io.ERR_PROCESS_BLOCK, read
}
}
if decoded > 0 {
_, err = output.Write(buffer[0:decoded])
if err != nil {
fmt.Printf("Failed to write decompressed block to file '%v': %v\n", this.outputName, err)
return io.ERR_WRITE_FILE, read
}
read += uint64(decoded)
}
}
// Close streams to ensure all data are flushed
// Deferred close is fallback for error paths
if err := cis.Close(); err != nil {
fmt.Printf("%v\n", err)
return io.ERR_PROCESS_BLOCK, read
}
after := time.Now()
delta := after.Sub(before).Nanoseconds() / 1000000 // convert to ms
printOut("", !this.silent)
msg = fmt.Sprintf("Decoding: %d ms", delta)
printOut(msg, !this.silent)
msg = fmt.Sprintf("Input size: %d", cis.GetRead())
printOut(msg, !this.silent)
msg = fmt.Sprintf("Output size: %d", read)
printOut(msg, !this.silent)
if delta > 0 {
msg = fmt.Sprintf("Throughput (KB/s): %d", ((read*uint64(1000))>>10)/uint64(delta))
printOut(msg, !this.silent)
}
printOut("", !this.silent)
return 0, cis.GetRead()
}
func testSpeed() {
fmt.Printf("Speed Test\n")
var filename = flag.String("filename", "r:\\output.bin", "Ouput file name for speed test")
flag.Parse()
values := []uint64{3, 1, 4, 1, 5, 9, 2, 6, 5, 3, 5, 8, 9, 7, 9, 3,
31, 14, 41, 15, 59, 92, 26, 65, 53, 35, 58, 89, 97, 79, 93, 32}
iter := 150
read := uint64(0)
written := uint64(0)
delta1 := int64(0)
delta2 := int64(0)
nn := 100000 * len(values)
defer os.Remove(*filename)
for test := 0; test < iter; test++ {
file1, err := os.Create(*filename)
if err != nil {
fmt.Printf("Cannot create %s", *filename)
return
}
bos, _ := io.NewBufferedOutputStream(file1)
obs, _ := bitstream.NewDefaultOutputBitStream(bos, 16*1024)
before := time.Now()
for i := 0; i < nn; i++ {
obs.WriteBits(values[i%len(values)], 1+uint(i&63))
}
// Close first to force flush()
obs.Close()
delta1 += time.Now().Sub(before).Nanoseconds()
written += obs.Written()
file1.Close()
file2, err := os.Open(*filename)
if err != nil {
fmt.Printf("Cannot open %s", *filename)
return
}
bis, _ := io.NewBufferedInputStream(file2)
ibs, _ := bitstream.NewDefaultInputBitStream(bis, 1024*1024)
before = time.Now()
for i := 0; i < nn; i++ {
ibs.ReadBits(1 + uint(i&63))
}
ibs.Close()
delta2 += time.Now().Sub(before).Nanoseconds()
read += ibs.Read()
file2.Close()
}
println()
fmt.Printf("%v bits written (%v MB)\n", written, written/1024/8192)
fmt.Printf("%v bits read (%v MB)\n", read, read/1024/8192)
println()
fmt.Printf("Write [ms] : %v\n", delta1/1000000)
fmt.Printf("Throughput [MB/s] : %d\n", (written/1024*1000/8192)/uint64(delta1/1000000))
fmt.Printf("Read [ms] : %v\n", delta2/1000000)
fmt.Printf("Throughput [MB/s] : %d\n", (read/1024*1000/8192)/uint64(delta2/1000000))
}