59 lines
1.2 KiB
Go
59 lines
1.2 KiB
Go
// Package unidecode implements a unicode transliterator
|
|
// which replaces non-ASCII characters with their ASCII
|
|
// approximations.
|
|
package unidecode
|
|
|
|
//go:generate go run make_table.go
|
|
|
|
import (
|
|
"sync"
|
|
"unicode"
|
|
)
|
|
|
|
const pooledCapacity = 64
|
|
|
|
var (
|
|
slicePool sync.Pool
|
|
decodingOnce sync.Once
|
|
)
|
|
|
|
// Unidecode implements a unicode transliterator, which
|
|
// replaces non-ASCII characters with their ASCII
|
|
// counterparts.
|
|
// Given an unicode encoded string, returns
|
|
// another string with non-ASCII characters replaced
|
|
// with their closest ASCII counterparts.
|
|
// e.g. Unicode("áéíóú") => "aeiou"
|
|
func Unidecode(s string) string {
|
|
decodingOnce.Do(decodeTransliterations)
|
|
l := len(s)
|
|
var r []rune
|
|
if l > pooledCapacity {
|
|
r = make([]rune, 0, len(s))
|
|
} else {
|
|
if x := slicePool.Get(); x != nil {
|
|
r = x.([]rune)[:0]
|
|
} else {
|
|
r = make([]rune, 0, pooledCapacity)
|
|
}
|
|
}
|
|
for _, c := range s {
|
|
if c <= unicode.MaxASCII {
|
|
r = append(r, c)
|
|
continue
|
|
}
|
|
if c > unicode.MaxRune || c > transCount {
|
|
/* Ignore reserved chars */
|
|
continue
|
|
}
|
|
if d := transliterations[c]; d != nil {
|
|
r = append(r, d...)
|
|
}
|
|
}
|
|
res := string(r)
|
|
if l <= pooledCapacity {
|
|
slicePool.Put(r)
|
|
}
|
|
return res
|
|
}
|