/*
* convert mule internal code to pg_wchar
* caller should allocate enough space for "to"
* len: length of from.
* "from" not necessarily null terminated.
*/
static int
pg_mule2wchar_with_len(const unsigned char *from, pg_wchar *to, int len)
{
int cnt = 0;
while (len > 0 && *from)
{
if (IS_LC1(*from) && len >= 2)
{
*to = *from++ << 16;
*to |= *from++;
len -= 2;
}
else if (IS_LCPRV1(*from) && len >= 3)
{
from++;
*to = *from++ << 16;
*to |= *from++;
len -= 3;
}
else if (IS_LC2(*from) && len >= 3)
{
*to = *from++ << 16;
*to |= *from++ << 8;
*to |= *from++;
len -= 3;
}
else if (IS_LCPRV2(*from) && len >= 4)
{
from++;
*to = *from++ << 16;
*to |= *from++ << 8;
*to |= *from++;
len -= 4;
}
else
{ /* assume ASCII */
*to = (unsigned char) *from++;
len--;
}
to++;
cnt++;
}
*to = 0;
return (cnt);
}
int
pg_mule_mblen(const unsigned char *s)
{
int len;
if (IS_LC1(*s))
len = 2;
else if (IS_LCPRV1(*s))
len = 3;
else if (IS_LC2(*s))
len = 3;
else if (IS_LCPRV2(*s))
len = 4;
else
len = 1; /* assume ASCII */
return len;
}