英文:
Golang: How to correctly parse UTF-8 string from C
问题
我是一个对Go语言不太熟悉的新手，所以这可能很明显。
我有一个Go函数，我正在使用go build -buildmode=c-shared和相应的//export funcName注释将其暴露给C语言。
（你可以在这里看到：https://github.com/udl/bmatch/blob/master/ext/levenshtein.go#L42）
我的转换目前是这样的：
func distance(s1in, s2in *C.char) int {
s1 := C.GoString(s1in)
s2 := C.GoString(s2in)
在这里，我该如何处理UTF-8输入？
我看到有一个UTF-8包，但我不太明白它是如何工作的。https://golang.org/pkg/unicode/utf8/
谢谢！
英文:
I'm a newbie to the go world, so maybe this is obvious.
I have a Go function which I'm exposing to C with the go build -buildmode=c-shared and corresponding //export funcName comment.
(You can see it here: https://github.com/udl/bmatch/blob/master/ext/levenshtein.go#L42)
My conversion currently works like this:
func distance(s1in, s2in *C.char) int {
s1 := C.GoString(s1in)
s2 := C.GoString(s2in)
How would I handle UTF-8 input here?
I've seen there is a UTF-8 package but I don't quite get how it works. https://golang.org/pkg/unicode/utf8/
Thank you!
答案1
得分: 6
你不需要做任何特殊处理。UTF-8是Go的“本地”字符编码，所以你可以使用你提到的utf8包中的函数，比如utf8.RuneCountInString来获取字符串中Unicode字符的数量。请记住，len(s)仍然会返回字符串中的字节数。
有关详细信息，请参阅官方博客中的这篇文章或这篇文章。
英文:
You don't need to do anything special. UTF-8 is Go's "native" character encoding, so you can use the functions from the utf8 package you mentioned, e.g. utf8.RuneCountInString to get the number of Unicode runes in a string. Keep in mind that len(s) will still return the number of bytes in the string.
See this post in the official blog or this article for some details.
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