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static int
sjis_mbtowc (conv_t conv, ucs4_t *pwc, const unsigned char *s, int n)
{
unsigned char c = *s;
if (c < 0x80 || (c >= 0xa1 && c <= 0xdf))
return jisx0201_mbtowc(conv,pwc,s,n);
else {
unsigned char s1, s2;
s1 = c;
if ((s1 >= 0x81 && s1 <= 0x9f) || (s1 >= 0xe0 && s1 <= 0xea)) {
if (n < 2)
return RET_TOOFEW(0);
s2 = s[1];
if ((s2 >= 0x40 && s2 <= 0x7e) || (s2 >= 0x80 && s2 <= 0xfc)) {
unsigned char t1 = (s1 < 0xe0 ? s1-0x81 : s1-0xc1);
unsigned char t2 = (s2 < 0x80 ? s2-0x40 : s2-0x41);
unsigned char buf[2];
buf[0] = 2*t1 + (t2 < 0x5e ? 0 : 1) + 0x21;
buf[1] = (t2 < 0x5e ? t2 : t2-0x5e) + 0x21;
return jisx0208_mbtowc(conv,pwc,buf,2);
}
} else if (s1 >= 0xf0 && s1 <= 0xf9) {
if (n < 2)
return RET_TOOFEW(0);
s2 = s[1];
if ((s2 >= 0x40 && s2 <= 0x7e) || (s2 >= 0x80 && s2 <= 0xfc)) {
*pwc = 0xe000 + 188*(s1 - 0xf0) + (s2 < 0x80 ? s2-0x40 : s2-0x41);
return 2;
}
}
return RET_ILSEQ;
}
}
static int
sjis_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
{
unsigned char buf[2];
int ret;
ret = jisx0201_wctomb(conv,buf,wc,1);
if (ret != RET_ILUNI) {
unsigned char c;
if (ret != 1) abort();
c = buf[0];
if (c < 0x80 || (c >= 0xa1 && c <= 0xdf)) {
r[0] = c;
return 1;
}
}
ret = jisx0208_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 <= 0x74) && (c2 >= 0x21 && c2 <= 0x7e)) {
unsigned char t1 = (c1 - 0x21) >> 1;
unsigned char t2 = (((c1 - 0x21) & 1) ? 0x5e : 0) + (c2 - 0x21);
r[0] = (t1 < 0x1f ? t1+0x81 : t1+0xc1);
r[1] = (t2 < 0x3f ? t2+0x40 : t2+0x41);
return 2;
}
}
if (wc >= 0xe000 && wc < 0xe758) {
unsigned char c1, c2;
if (n < 2)
return RET_TOOSMALL;
c1 = (unsigned int) (wc - 0xe000) / 188;
c2 = (unsigned int) (wc - 0xe000) % 188;
r[0] = c1+0xf0;
r[1] = (c2 < 0x3f ? c2+0x40 : c2+0x41);
return 2;
}
return RET_ILUNI;
}
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