import (
// "bufio"
"flag"
"fmt"
"io"
"os"
)
import "strconv"
var infile *string = ("f", "Null", "please input a file name or dir.")
var size *string = ("s", "0", "please input a dst file size.")
//func dataCopy(file *, file *)
func SplitFile(file *, size int) {
finfo, err := ()
if err != nil {
("get file info failed:", file, size)
}
(finfo, size)
//Copy up to 1m per time
bufsize := 1024 * 1024
if size < bufsize {
bufsize = size
}
buf := make([]byte, bufsize)
num := (int(()) + size - 1) / size
(num, len(buf))
for i := 0; i < num; i++ {
copylen := 0
newfilename := () + (i)
newfile, err1 := (newfilename)
if err1 != nil {
("failed to create file", newfilename)
} else {
("create file:", newfilename)
}
for copylen < size {
n, err2 := (buf)
if err2 != nil && err2 != {
(err2, "failed to read from:", file)
break
}
if n <= 0 {
break
}
//(n, len(buf))
//Write a file
w_buf := buf[:n]
(w_buf)
copylen += n
}
}
return
}
func main() {
()
if *infile == "Null" {
("no file to input")
return
}
file, err := (*infile)
if err != nil {
("failed to open:", *infile)
}
defer ()
size, _ := (*size)
SplitFile(file, size*1024)
}