-#endif // wxUSE_STD_IOSTREAM
-
-// ===========================================================================
-// wxString class core
-// ===========================================================================
-
-#if wxUSE_UNICODE_UTF8
-
-// ---------------------------------------------------------------------------
-// UTF-8 operations
-// ---------------------------------------------------------------------------
-
-//
-// Table 3.1B from Unicode spec: Legal UTF-8 Byte Sequences
-//
-// Code Points | 1st Byte | 2nd Byte | 3rd Byte | 4th Byte |
-// -------------------+----------+----------+----------+----------+
-// U+0000..U+007F | 00..7F | | | |
-// U+0080..U+07FF | C2..DF | 80..BF | | |
-// U+0800..U+0FFF | E0 | A0..BF | 80..BF | |
-// U+1000..U+FFFF | E1..EF | 80..BF | 80..BF | |
-// U+10000..U+3FFFF | F0 | 90..BF | 80..BF | 80..BF |
-// U+40000..U+FFFFF | F1..F3 | 80..BF | 80..BF | 80..BF |
-// U+100000..U+10FFFF | F4 | 80..8F | 80..BF | 80..BF |
-// -------------------+----------+----------+----------+----------+
-
-bool wxString::IsValidUtf8String(const char *str)
-{
- if ( !str )
- return true; // empty string is UTF8 string
-
- const unsigned char *c = (const unsigned char*)str;
-
- for ( ; *c; ++c )
- {
- unsigned char b = *c;
-
- if ( b <= 0x7F ) // 00..7F
- continue;
-
- else if ( b < 0xC2 ) // invalid lead bytes: 80..C1
- return false;
-
- // two-byte sequences:
- else if ( b <= 0xDF ) // C2..DF
- {
- b = *(++c);
- if ( !(b >= 0x80 && b <= 0xBF ) )
- return false;
- }
-
- // three-byte sequences:
- else if ( b == 0xE0 )
- {
- b = *(++c);
- if ( !(b >= 0xA0 && b <= 0xBF ) )
- return false;
- b = *(++c);
- if ( !(b >= 0x80 && b <= 0xBF ) )
- return false;
- }
- else if ( b <= 0xEF ) // E1..EF
- {
- for ( int i = 0; i < 2; ++i )
- {
- b = *(++c);
- if ( !(b >= 0x80 && b <= 0xBF ) )
- return false;
- }
- }
-
- // four-byte sequences:
- else if ( b == 0xF0 )
- {
- b = *(++c);
- if ( !(b >= 0x90 && b <= 0xBF ) )
- return false;
- for ( int i = 0; i < 2; ++i )
- {
- b = *(++c);
- if ( !(b >= 0x80 && b <= 0xBF ) )
- return false;
- }
- }
- else if ( b <= 0xF3 ) // F1..F3
- {
- for ( int i = 0; i < 3; ++i )
- {
- b = *(++c);
- if ( !(b >= 0x80 && b <= 0xBF ) )
- return false;
- }
- }
- else if ( b == 0xF4 )
- {
- b = *(++c);
- if ( !(b >= 0x80 && b <= 0x8F ) )
- return false;
- for ( int i = 0; i < 2; ++i )
- {
- b = *(++c);
- if ( !(b >= 0x80 && b <= 0xBF ) )
- return false;
- }
- }
- else // otherwise, it's invalid lead byte
- return false;
- }
-
- return true;
-}
-
-#ifdef __WXDEBUG__
-/* static */
-bool wxString::IsValidUtf8LeadByte(unsigned char c)
-{
- return (c <= 0x7F) || (c >= 0xC2 && c <= 0xF4);
-}
-#endif
-
-unsigned char wxString::ms_utf8IterTable[256] = {
- // single-byte sequences (ASCII):
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 00..0F
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 10..1F
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 20..2F
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 30..3F
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 40..4F
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 50..5F
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 60..6F
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 70..7F
-
- // these are invalid, we use step 1 to skip
- // over them (should never happen):
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 80..8F
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 90..9F
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // A0..AF
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // B0..BF
- 1, 1, // C0,C1
-
- // two-byte sequences:
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // C2..CF
- 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // D0..DF
-
- // three-byte sequences:
- 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, // E0..EF
-
- // four-byte sequences:
- 4, 4, 4, 4, 4, // F0..F4
-
- // these are invalid again (5- or 6-byte
- // sequences and sequences for code points
- // above U+10FFFF, as restricted by RFC 3629):
- 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1 // F5..FF
-};
-
-/* static */
-void wxString::DecIter(wxStringImpl::const_iterator& i)
-{
- wxASSERT( IsValidUtf8LeadByte(*i) );
-
- // Non-lead bytes are all in the 0x80..0xBF range (i.e. 10xxxxxx in
- // binary), so we just have to go back until we hit a byte that is either
- // < 0x80 (i.e. 0xxxxxxx in binary) or 0xC0..0xFF (11xxxxxx in binary; this
- // includes some invalid values, but we can ignore it here, because we
- // assume valid UTF-8 input for the purpose of efficient implementation).
- --i;
- while ( ((*i) & 0xC0) == 0x80 /* 2 highest bits are '10' */ )
- --i;
-}
-
-/* static */
-void wxString::DecIter(wxStringImpl::iterator& i)
-{
- // FIXME-UTF8: use template instead
- wxASSERT( IsValidUtf8LeadByte(*i) );
- --i;
- while ( ((*i) & 0xC0) == 0x80 /* 2 highest bits are '10' */ )
- --i;
-}
-
-/* static */
-wxStringImpl::const_iterator
-wxString::AddToIter(wxStringImpl::const_iterator i, int n)
-{
- wxStringImpl::const_iterator out(i);
-
- if ( n > 0 )
- {
- for ( int j = 0; j < n; ++j )
- IncIter(out);
- }
- else if ( n < 0 )
- {
- for ( int j = 0; j > n; --j )
- DecIter(out);
- }
-
- return out;
-}