iconv

size_t iconv(iconv_t cd,  const  scope  char * *  inbuf,
          size_t *  inbytesleft,
          char * *  outbuf,
          size_t *  outbytesleft)

Convert at most INBYTESLEFT bytes from INBUF according to the code conversion algorithm specified by CD and place up to

OUTBYTESLEFT bytes in buffer at OUTBUF.