rclone/fs/accounting/stringset.go

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package accounting
import (
"fmt"
"sort"
"strings"
"sync"
"github.com/ncw/rclone/fs"
)
// stringSet holds a set of strings
type stringSet struct {
mu sync.RWMutex
items map[string]struct{}
name string
}
// newStringSet creates a new empty string set of capacity size
func newStringSet(size int, name string) *stringSet {
return &stringSet{
items: make(map[string]struct{}, size),
name: name,
}
}
// add adds remote to the set
func (ss *stringSet) add(remote string) {
ss.mu.Lock()
ss.items[remote] = struct{}{}
ss.mu.Unlock()
}
// del removes remote from the set
func (ss *stringSet) del(remote string) {
ss.mu.Lock()
delete(ss.items, remote)
ss.mu.Unlock()
}
// merge adds items from another set
func (ss *stringSet) merge(m *stringSet) {
ss.mu.Lock()
m.mu.Lock()
for item := range m.items {
ss.items[item] = struct{}{}
}
m.mu.Unlock()
ss.mu.Unlock()
}
// empty returns whether the set has any items
func (ss *stringSet) empty() bool {
ss.mu.RLock()
defer ss.mu.RUnlock()
return len(ss.items) == 0
}
// count returns the number of items in the set
func (ss *stringSet) count() int {
ss.mu.RLock()
defer ss.mu.RUnlock()
return len(ss.items)
}
// String returns string representation of set items.
func (ss *stringSet) String(progress *inProgress) string {
ss.mu.RLock()
defer ss.mu.RUnlock()
strngs := make([]string, 0, len(ss.items))
for name := range ss.items {
var out string
if acc := progress.get(name); acc != nil {
out = acc.String()
} else {
out = fmt.Sprintf("%*s: %s",
fs.Config.StatsFileNameLength,
shortenName(name, fs.Config.StatsFileNameLength),
ss.name,
)
}
strngs = append(strngs, " * "+out)
}
sorted := sort.StringSlice(strngs)
sorted.Sort()
return strings.Join(sorted, "\n")
}
// progress returns total bytes read as well as the size.
func (ss *stringSet) progress(stats *StatsInfo) (totalBytes, totalSize int64) {
ss.mu.RLock()
defer ss.mu.RUnlock()
for name := range ss.items {
if acc := stats.inProgress.get(name); acc != nil {
bytes, size := acc.progress()
if size >= 0 && bytes >= 0 {
totalBytes += bytes
totalSize += size
}
}
}
return totalBytes, totalSize
}