thodg/libiconv/lib/ucs4.h

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• Hash : a615528b
  Author :
  Date : 2000-11-23T19:54:07
  

  Move src/ to lib/, and install the iconv program.
  

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• lib/ucs4.h

• /*
   * UCS-4
   */
  
  /* Here we accept 0000FFFE/0000FEFF marks as endianness indicators everywhere
     in the stream, not just at the beginning. The default is big-endian. */
  /* The state is 0 if big-endian, 1 if little-endian. */
  static int
  ucs4_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
  {
    state_t state = conv->istate;
    int count = 0;
    for (; n >= 4;) {
      ucs4_t wc = (state
                    ? s[0] + (s[1] << 8) + (s[2] << 16) + (s[3] << 24)
                    : (s[0] << 24) + (s[1] << 16) + (s[2] << 8) + s[3]);
      s += 4; n -= 4; count += 4;
      if (wc == 0xfeff) {
      } else if (wc == 0xfffe) {
        state ^= 1;
      } else if (wc <= 0x7fffffff) {
        *pwc = wc;
        conv->istate = state;
        return count;
      } else
        return RET_ILSEQ;
    }
    conv->istate = state;
    return RET_TOOFEW(count);
  }
  
  /* But we output UCS-4 in big-endian order, without byte-order mark. */
  static int
  ucs4_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
  {
    if (wc != 0xfffe) {
      if (n >= 4) {
        r[0] = (unsigned char) (wc >> 24);
        r[1] = (unsigned char) (wc >> 16);
        r[2] = (unsigned char) (wc >> 8);
        r[3] = (unsigned char) wc;
        return 4;
      } else
        return RET_TOOSMALL;
    } else
      return RET_ILSEQ;
  }
  

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