我如何使用ICU4C正常化的字符串？

问题描述

我觉得ICU文档有点挑战性。

I find the ICU docs somewhat challenging.

我的问题是：我如何使用ICU4C正常化字符串

My question is: How do I normalize a string using ICU4C?

我看着unorm2_normalize，但如果缓冲区不够大呢？我怎么会知道之前呢？当然，我想正常化整个字符串。

I'm looking at unorm2_normalize, but what if the buffer isn't large enough? How would I know this before? Naturally, I want to normalize the entire string.

谢谢！ ：>

P.S。下面是该函数的API文档：的

P.S. Here is the API doc on that function: http://icu-project.org/apiref/icu4c/unorm2_8h.html#a0a596802db767da410b4b04cb75cbc53

推荐答案

您得到一个错误code从PERROR code参数所有这些函数调用回来。这是你如何把这种功能：

You get a error code back from all these function call in the pErrorCode parameter. This is how you call such a function:

UErrorCode error = U_ZERO_ERROR;
unorm2_normalize( ... &error );
....
if( !U_SUCCESS( error ) )
{
    // handle error...
}

下面是错误codeS：的

Here are the error codes: http://icu-project.org/apiref/icu4c/utypes_8h.html#a3343c1c8a8377277046774691c98d78c

在你的情况，你可能想要做这样的事情：

In your case you might want to do something like this:

if( error == U_STRING_NOT_TERMINATED_WARNING
   || error == U_BUFFER_OVERFLOW_ERROR )
{
    // enlarge the buffer...
}

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