Not an issue

[ridams]

How to loop through a utf8 str like :

for (int =0;i<strlen(*char);i++) do_somethingwith *char_[i]

[sheredom]

You do:

utf8_int32_t codepoint;
for (void* next = utf8codepoint(ptr, &codepoint); codepoint != 0; next = utf8codepoint(next, &codepoint)) {
  // codepoint is your current utf-8 codepoint
}