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static int
utf32_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]);
count += 4;
if (wc == 0x0000feff) {
} else if (wc == 0xfffe0000u) {
state ^= 1;
} else {
if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) {
*pwc = wc;
conv->istate = state;
return count;
} else {
conv->istate = state;
return RET_SHIFT_ILSEQ(count);
}
}
s += 4; n -= 4;
}
conv->istate = state;
return RET_TOOFEW(count);
}
static int
utf32_wctomb (conv_t conv, unsigned char *r, ucs4_t wc, int n)
{
if (wc < 0x110000 && !(wc >= 0xd800 && wc < 0xe000)) {
int count = 0;
if (!conv->ostate) {
if (n >= 4) {
r[0] = 0x00;
r[1] = 0x00;
r[2] = 0xFE;
r[3] = 0xFF;
r += 4; n -= 4; count += 4;
} else
return RET_TOOSMALL;
}
if (wc < 0x110000) {
if (n >= 4) {
r[0] = 0;
r[1] = (unsigned char) (wc >> 16);
r[2] = (unsigned char) (wc >> 8);
r[3] = (unsigned char) wc;
conv->ostate = 1;
return count+4;
} else
return RET_TOOSMALL;
}
}
return RET_ILUNI;
}
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