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default.go
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default.go
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package sat
import (
"bufio"
"errors"
"log"
"os"
"path"
"runtime"
"sync"
)
type defaultDict struct {
mt sync.RWMutex
data map[rune]rune
dataReverse map[rune]rune
opts Options
}
func (d *defaultDict) set(on, under rune) {
d.mt.Lock()
defer d.mt.Unlock()
d.data[on] = under
d.dataReverse[under] = on
}
func (d *defaultDict) getData(char rune) rune {
d.mt.RLock()
defer d.mt.RUnlock()
if s, ok := d.data[char]; ok {
return s
}
return char
}
func (d *defaultDict) getDataR(char rune) rune {
d.mt.RLock()
defer d.mt.RUnlock()
if s, ok := d.dataReverse[char]; ok {
return s
}
return char
}
func (d *defaultDict) defaultFile() (*os.File, error) {
_, file, _, _ := runtime.Caller(1)
base := path.Dir(file) + "/dict.txt"
return os.Open(base)
}
func (d *defaultDict) Init(opts ...Option) error {
for _, o := range opts {
o(&d.opts)
}
return nil
}
func read(s string, f func(char rune) rune) string {
r := []rune(s)
for i := 0; i < len(r); i++ {
r[i] = f(r[i]) //d.getData(r[i])
}
return string(r)
}
func (d *defaultDict) Read(s string) string {
return read(s, d.getData)
}
func (d *defaultDict) ReadReverse(s string) string {
return read(s, d.getDataR)
}
var d *defaultDict
func DefaultDict() Dicter {
if d == nil {
err := InitDefaultDict()
if err != nil {
log.Fatal(err)
}
}
return d
}
func InitDefaultDict(opts ...Option) error {
d = &defaultDict{
data: make(map[rune]rune),
dataReverse: make(map[rune]rune),
}
d.Init(opts...)
var (
err error
file *os.File
)
var simplified []rune
var traditional []rune
if d.opts.Path != "" {
file, err = os.Open(d.opts.Path)
if err != nil {
return err
}
buf := bufio.NewScanner(file)
var i int
for buf.Scan() {
text := buf.Text()
switch i {
case 0:
simplified = []rune(text)
case 1:
traditional = []rune(text)
}
i++
}
} else {
simplified = defaultSimplified
traditional = defaultTraditional
}
if len(simplified) != len(traditional) {
return errors.New("the length of simplified varies from the length of traditional")
}
for i := 0; i < len(simplified); i++ {
d.set(traditional[i], simplified[i])
}
return nil
}