mirror of
https://github.com/jezhiggins/arabica
synced 2025-01-01 06:20:38 +01:00
56 lines
1.7 KiB
C++
56 lines
1.7 KiB
C++
// --------------------------------------------------------------------------
|
|
// --------------------------------------------------------------------------
|
|
#include "ucs2_utf16.h"
|
|
// --------------------------------------------------------------------------
|
|
std::codecvt_base::result Arabica::Internal::utf16_2_ucs2(bool be,
|
|
char const* from, char const* from_end, char const*& from_next,
|
|
wchar_t* to, wchar_t* to_limit, wchar_t*& to_next)
|
|
{
|
|
from_next = from;
|
|
to_next = to;
|
|
|
|
while((from_next+1 < from_end) && (to_next < to_limit))
|
|
{
|
|
wchar_t b1 = static_cast<unsigned char>(*from_next++);
|
|
wchar_t b2 = static_cast<unsigned char>(*from_next++);
|
|
|
|
*to_next++ = be ? ((b1 << 8) + b2) : ((b2 << 8) + b1);
|
|
} // while
|
|
|
|
return (from_next == from_end) ? std::codecvt_base::ok : std::codecvt_base::partial;
|
|
} // utf16_2_ucs2
|
|
|
|
std::codecvt_base::result Arabica::Internal::ucs2_2_utf16(bool be,
|
|
wchar_t const* from, wchar_t const* from_end, wchar_t const*& from_next,
|
|
char* to, char* to_limit, char*& to_next)
|
|
{
|
|
from_next = from;
|
|
to_next = to;
|
|
|
|
while(from_next < from_end)
|
|
{
|
|
if(to_next + 2 >= to_limit)
|
|
return std::codecvt_base::partial;
|
|
|
|
wchar_t ch = *from_next;
|
|
unsigned char lb = static_cast<unsigned char>(ch & 0xFF);
|
|
unsigned char hb = static_cast<unsigned char>((ch >> 8) & 0xFF);
|
|
|
|
if(be)
|
|
{ // big endian
|
|
*to_next++ = hb;
|
|
*to_next++ = lb;
|
|
}
|
|
else
|
|
{ // little endian
|
|
*to_next++ = lb;
|
|
*to_next++ = hb;
|
|
}
|
|
|
|
++from_next;
|
|
} // while(from_next < from_end)
|
|
|
|
return std::codecvt_base::ok;
|
|
} // ucs2_2_utf8
|
|
|
|
// end of file
|