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file_tools.go
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file_tools.go
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package mttools
import (
"errors"
"fmt"
"os"
"path/filepath"
)
// Returns true if file exists and access is not denied.
func IsFileExists(path string) bool {
file_info, err := os.Stat(path)
if os.IsNotExist(err) || os.IsPermission(err) {
return false
}
if file_info.IsDir() {
return false
}
return true
}
// Returns true if directory exists and access is not denied.
func IsDirExists(path string) bool {
file_info, err := os.Stat(path)
if os.IsNotExist(err) || os.IsPermission(err) {
return false
}
if !file_info.IsDir() {
return false
}
return true
}
// Returns absolute path for directory. If `path` is "" current working directory is used.
func GetDirAbsolutePath(path string) (abs_path string, err error) {
abs_path = path
if abs_path == "" {
abs_path = "." //current directory
}
if !filepath.IsAbs(abs_path) {
abs_path, err = filepath.Abs(path)
if err != nil {
return
}
}
if !IsDirExists(abs_path) {
return abs_path, errors.New("\"" + path + "\" directory does not exists")
}
return
}
// Convert fille size to human-readable string
func FormatFileSize(size int64) string {
if size > 1024*1024*1024*1024 {
return fmt.Sprintf("%.2fTb", float64(size)/(1024*1024*1024*1024))
} else if size > 1024*1024*1024 {
return fmt.Sprintf("%2.2fGb", float64(size)/(1024*1024*1024))
} else if size > 1024*1024 {
return fmt.Sprintf("%2.2fMb", float64(size)/(1024*1024))
} else if size > 1024 {
return fmt.Sprintf("%2.2fKb", float64(size)/1024)
}
return fmt.Sprintf("%db", size)
}