C function for getting user input

C function for getting user input.
Reads up to uinput-1 characters from stdin to uinput, removes \n adn adds \0. 
Returns number of characters of uinput.

int getUserInput(char *uinput, int size){

size_t last;

fgets(uinput, size, stdin);

if (strlen(uinput) > 0){
last = strlen(uinput) - 1;
if (uinput[last] == '\n'){ //if last char is \n replace with \0
uinput[last] = '\0';
} else {
//no \n in buffer, discard additional characters.
fscanf (stdin, "%*[^\n]"); 
(void) fgetc (stdin); // discard \n
}
}
return strlen(uinput);
}