CODEWITHSUNDEEP
c++file-iounicodeutf-8
Venkatesan
Venkatesan

Reputation: 442

How to write utf-8 characters to a file using c++

How to write utf-8 characters to a file using c++?

For example, utf-8 value=0xc389 If I write this into a file in binary mode , I have to see characters.

so far I have tried the following

unsigned short array[4]={0xc3,0x89,0xc3,0x8a};
std::ofstream file;
file.open("1.txt", std::ios_base::binary);
file.write(reinterpret_cast<char const*>(array),sizeof(array));

But it takes 0xc3 as single character and it prints its equivalent character of 0xc3 unicode value. Help me how to write the utf-8 value to file using c++ in binary mode

Upvotes: 0

Views: 8017

Answers (1)

doptimusprime
doptimusprime

Reputation: 9395

Why are you using short array when char array will solve your purpose?

First of all, in UTF-8, you write byte by byte. If your sequence is a valid UTF-8 byte sequence, then write them byte by byte.

If it is unicode character, first convert your character stream to UTF-8 character as characters beyond 0x7f will be treated differently.

//I assume this a valid UTF-8 sequence.
unsigned char array[4]={0xc3,0x89,0xc3,0x8a};
std::ofstream file;
file.open("1.txt", std::ios_base::binary);
file.write(reinterpret_cast<char const*>(array),sizeof(array));

In case, array is not a UTF-8 sequence but some character, you can use iconv on linux to convert to UTF-8.

Upvotes: 3

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