strmid

char * strmid(char * dest, char * source, int start, size_t count, int maxlength) {
    maxlength = sizeof(dest);
    source[0] = '\0';
    if(dest != NULL) {
        size_t len = strlen(dest);
        if(start < 0) start = len + start;
        if(start >= 0 && start < len) {
            if(count == 0 || count > len - start) count = len - start;
            if(count < maxlength) {
                strncpy(source, dest + start, count);
                source[count] = 0;
            }
        }
    }
    return source;
}