void FUN_004181e0(int param_1)

{

  char cVar1;

  undefined *__s;

  char *pcVar2;

  char *pcVar3;

  __s = PTR_DAT_004303c8;

  pcVar3 = *(char **)(param_1 + 4);

  cVar1 = *pcVar3;

  while( true ) {

    if (cVar1 == 0) {

      return;

    }

    pcVar2 = strchr(__s,(int)cVar1);

    pcVar3 = pcVar3 + 1;

    if (pcVar2 == (char *)0x0) break;

    *(char **)(param_1 + 4) = pcVar3;

    cVar1 = *pcVar3;

  }

  return;

}