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static int
johab_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
{
unsigned char c = *s;
if (c < 0x80) {
if (c == 0x5c)
*pwc = (ucs4_t) 0x20a9;
else
*pwc = (ucs4_t) c;
return 1;
} else if (c < 0xd8) {
return johab_hangul_mbtowc(conv,pwc,s,n);
} else {
unsigned char s1, s2;
s1 = c;
if ((s1 >= 0xd9 && s1 <= 0xde) || (s1 >= 0xe0 && s1 <= 0xf9)) {
if (n < 2)
return RET_TOOFEW(0);
s2 = s[1];
if ((s2 >= 0x31 && s2 <= 0x7e) || (s2 >= 0x91 && s2 <= 0xfe)) {
if (!(s1 == 0xda && (s2 >= 0xa1 && s2 <= 0xd3))) {
unsigned char t1 = (s1 < 0xe0 ? 2*(s1-0xd9) : 2*s1-0x197);
unsigned char t2 = (s2 < 0x91 ? s2-0x31 : s2-0x43);
unsigned char buf[2];
buf[0] = t1 + (t2 < 0x5e ? 0 : 1) + 0x21;
buf[1] = (t2 < 0x5e ? t2 : t2-0x5e) + 0x21;
return ksc5601_mbtowc(conv,pwc,buf,2);
}
}
}
return RET_ILSEQ;
}
}
static int
johab_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
{
unsigned char buf[2];
int ret;
if (wc < 0x0080 && wc != 0x005c) {
*r = wc;
return 1;
}
if (wc == 0x20a9) {
*r = 0x5c;
return 1;
}
ret = johab_hangul_wctomb(conv,buf,wc,2);
if (ret != RET_ILUNI) {
if (ret != 2) abort();
if (n < 2)
return RET_TOOSMALL;
r[0] = buf[0];
r[1] = buf[1];
return 2;
}
ret = ksc5601_wctomb(conv,buf,wc,2);
if (ret != RET_ILUNI) {
unsigned char c1, c2;
if (ret != 2) abort();
if (n < 2)
return RET_TOOSMALL;
c1 = buf[0];
c2 = buf[1];
if (((c1 >= 0x21 && c1 <= 0x2c) || (c1 >= 0x4a && c1 <= 0x7d))
&& (c2 >= 0x21 && c2 <= 0x7e)) {
unsigned int t = (c1 < 0x4A ? (c1-0x21+0x1B2) : (c1-0x21+0x197));
unsigned char t2 = ((t & 1) ? 0x5e : 0) + (c2 - 0x21);
r[0] = t >> 1;
r[1] = (t2 < 0x4e ? t2+0x31 : t2+0x43);
return 2;
}
}
return RET_ILUNI;
}
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