dundee/gdu

package common

import (
    "regexp"
    "strconv"
)

// UI struct
type UI struct {
    Analyzer              Analyzer
    IgnoreDirPaths        map[string]struct{}
    IgnoreDirPathPatterns *regexp.Regexp
    IgnoreHidden          bool
    UseColors             bool
    UseSIPrefix           bool
    ShowProgress          bool
    ShowApparentSize      bool
    ShowRelativeSize      bool
    ConstGC               bool
}

// SetAnalyzer sets analyzer instance
func (ui *UI) SetAnalyzer(a Analyzer) {
    ui.Analyzer = a
}

// SetFollowSymlinks sets whether symlinks to files should be followed
func (ui *UI) SetFollowSymlinks(v bool) {
    ui.Analyzer.SetFollowSymlinks(v)
}

// binary multiplies prefixes (IEC)
const (
    _ float64 = 1 << (10 * iota)
    Ki
    Mi
    Gi
    Ti
    Pi
    Ei
)

// SI prefixes
const (
    K float64 = 1e3
    M float64 = 1e6
    G float64 = 1e9
    T float64 = 1e12
    P float64 = 1e15
    E float64 = 1e18
)

// FormatNumber returns number as a string with thousands separator
func FormatNumber(n int64) string {
    in := []byte(strconv.FormatInt(n, 10))

    var out []byte
    if i := len(in) % 3; i != 0 {
        if out, in = append(out, in[:i]...), in[i:]; len(in) > 0 {
            out = append(out, ',')
        }
    }
    for len(in) > 0 {
        if out, in = append(out, in[:3]...), in[3:]; len(in) > 0 {
            out = append(out, ',')
        }
    }
    return string(out)
}