SDL_strlcat - Concatenate strings.

       This function is available since SDL 3.2.0.

       This  function appends up to maxlen - SDL_strlen(dst) - 1 characters from src to the end of the string in
       dst, then appends a null terminator.

       src and dst must not overlap.

       If maxlen - SDL_strlen(dst) - 1 is less than or equal to 0, then dst is unmodified.

dst    The destination buffer already containing the first null-terminated string. Must not be  NULL  and
              must not overlap with src.

       src    The second null-terminated string. Must not be NULL, and must not overlap with dst.

       maxlen The length (in characters) of the destination buffer.

       SDL_strlcat - Concatenate strings.

       Returns the length (in characters, excluding the null terminator) of the string in dst plus the length of
       src.

SDL_strlcpy(3)

Simple Directmedia Layer                           SDL 3.2.20                                     SDL_strlcat(3)

#include<SDL3/SDL_stdinc.h>size_tSDL_strlcat(char*dst,constchar*src,size_tmaxlen);

       It is safe to call this function from any thread.