Add a replxx_hints_size function for c api.

[Milerius]

So we can detect if there is only one match in the hints, and make a colorized output also in C and other bindings.

[AmokHuginnsson]

Can you explain what is the use of the proposed API function?

[Milerius]

It's the equivalent of the exemple in cxx-api.cxx (hints.size()) to detect that only one hint's remain

[AmokHuginnsson]

cxx-api example has call hints.size() indeed, but this call is not using replxx API, it is client code only. You can already achieve the same effect with C API. To be honest I still do not understand what do you want to achieve. Client code knows how many hints there are and replxx code does not cache this information anywhere. And caching this information should be responsibility of client code anyway.

[Milerius]

How can you get the hints.size using the c api :O ?

[AmokHuginnsson]

Please look at the code of the cxx-api example carefully.
The hints variable is defined locally, and populated locally in the for loop, hints.size() is just a lucky convenience given by std::vector<T> type. In C code one would have to use local variable to count hints.

Using c-api hintHook as an example:

void hintHook(char const* context, replxx_hints* lc, int* contextLen, ReplxxColor* c, void* ud) {
  char** examples = (char**)( ud );
  int i;
  int utf8ContextLen = context_len( context );
  int prefixLen = strlen( context ) - utf8ContextLen;
  int hintCount = 0;
  *contextLen = utf8str_codepoint_len( context + prefixLen, utf8ContextLen );
  if ( *contextLen > 0 ) {
    for (i = 0; examples[i] != NULL; ++i) {                                                                                                                                                                                                                    
      if (strncmp(context + prefixLen, examples[i], utf8ContextLen) == 0) {
        replxx_add_hint(lc, examples[i]);
        ++ hintCount;
      }
    }
  }
  // now `hintCount` variable holds the number of hints.
} 

[Milerius]

Ok I got it, thank's a lot