thodg/libiconv/src/euc_tw.h

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• Hash : 3af9cd39
  Author :
  Date : 1999-12-31T12:50:49
  

  Import from libiconv-0.3.
  

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• src/euc_tw.h

• 
  /*
   * EUC-TW
   */
  
  static int
  euc_tw_mbtowc (conv_t conv, wchar_t *pwc, const unsigned char *s, int n)
  {
    unsigned char c = *s;
    /* Code set 0 (ASCII) */
    if (c < 0x80)
      return ascii_mbtowc(conv,pwc,s,n);
    /* Code set 1 (CNS 11643-1992 Plane 1) */
    if (c >= 0xa1 && c < 0xff) {
      if (n < 2)
        return RET_TOOFEW(0);
      {
        unsigned char c2 = s[1];
        if (c2 >= 0xa1 && c2 < 0xff) {
          unsigned char buf[2];
          buf[0] = c-0x80; buf[1] = c2-0x80;
          return cns11643_1_mbtowc(conv,pwc,buf,2);
        } else
          return RET_ILSEQ;
      }
    }
    /* Code set 2 (CNS 11643-1992 Planes 1-16) */
    if (c == 0x8e) {
      if (n < 4)
        return RET_TOOFEW(0);
      {
        unsigned char c2 = s[1];
        if (c2 >= 0xa1 && c2 <= 0xb0) {
          unsigned char c3 = s[2];
          unsigned char c4 = s[3];
          if (c3 >= 0xa1 && c3 < 0xff && c4 >= 0xa1 && c4 < 0xff) {
            unsigned char buf[2];
            int ret;
            buf[0] = c3-0x80; buf[1] = c4-0x80;
            switch (c3-0xa0) {
              case 1: ret = cns11643_1_mbtowc(conv,pwc,buf,2); break;
              case 2: ret = cns11643_2_mbtowc(conv,pwc,buf,2); break;
              case 3: ret = cns11643_3_mbtowc(conv,pwc,buf,2); break;
              default: return RET_ILSEQ;
            }
            if (ret == RET_ILSEQ)
              return RET_ILSEQ;
            if (ret != 2) abort();
            return 4;
          }
        }
      }
    }
    return RET_ILSEQ;
  }
  
  static int
  euc_tw_wctomb (conv_t conv, unsigned char *r, wchar_t wc, int n)
  {
    unsigned char buf[3];
    int ret;
  
    /* Code set 0 (ASCII) */
    ret = ascii_wctomb(conv,r,wc,n);
    if (ret != RET_ILSEQ)
      return ret;
  
    ret = cns11643_wctomb(conv,buf,wc,3);
    if (ret != RET_ILSEQ) {
      if (ret != 3) abort();
  
      /* Code set 1 (CNS 11643-1992 Plane 1) */
      if (buf[0] == 0) {
        if (n < 2)
          return RET_TOOSMALL;
        r[0] = buf[1]+0x80;
        r[1] = buf[2]+0x80;
        return 2;
      }
  
      /* Code set 2 (CNS 11643-1992 Planes 1-16) */
      if (n < 4)
        return RET_TOOSMALL;
      r[0] = 0x8e;
      r[1] = buf[0]+0xa1;
      r[2] = buf[1]+0x80;
      r[3] = buf[2]+0x80;
      return 4;
    }
  
    return RET_ILSEQ;
  }
  

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