SDL_wcslen - This works exactly like wcslen() but doesn't require access to a C runtime.

       This function is available since SDL 3.2.0.

       Counts the number of wchar_t values in wstr , excluding the null terminator.

       Like SDL_strlen
        only  counts bytes and not codepoints in a UTF-8 string, this counts wchar_t values in a string, even if
       the string's encoding is of variable width, like UTF-16.

       Also be aware that wchar_t is different sizes on different platforms (4 bytes on  Linux,  2  on  Windows,
       etc).

wstr   The null-terminated wide string to read. Must not be NULL.

       Defined in SDL3/SDL_stdinc.h

       SDL_wcslen - This works exactly like wcslen() but doesn't require access to a C runtime.

       Returns the length (in wchar_t values, excluding the null terminator) of wstr .

•(3), SDL_wcsnlen(3), •(3), SDL_utf8strlen(3), •(3), SDL_utf8strnlen(3)

Simple Directmedia Layer                           SDL 3.2.10                                      SDL_wcslen(3)

#include"SDL3/SDL.h"size_tSDL_wcslen(constwchar_t*wstr);

       It is safe to call this function from any thread.