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38 lines
1.5 KiB
C++
38 lines
1.5 KiB
C++
/* This file is (c) 2008-2011 Konstantin Isakov <ikm@users.berlios.de>
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* Part of GoldenDict. Licensed under GPLv3 or later, see the LICENSE file */
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#include <cstdio>
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#include <string>
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#include "ex.hh"
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#include "wstring.hh"
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/// A simple UTF-8 encoder/decoder. Some dictionary backends only require
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/// utf8, so we have this separately, removing the iconv dependency for them.
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/// Besides, utf8 is quite ubiquitous now, and its use is spreaded over many
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/// places.
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namespace Utf8 {
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using std::string;
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using gd::wstring;
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using gd::wchar;
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DEF_EX_STR( exCantDecode, "Can't decode the given string from Utf8:", std::exception )
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/// Encodes the given UCS-4 into UTF-8. The inSize specifies the number
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/// of wide characters the 'in' pointer points to. The 'out' buffer must be
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/// at least inSize * 4 bytes long. The function returns the number of chars
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/// stored in the 'out' buffer. The result is not 0-terminated.
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size_t encode( wchar const * in, size_t inSize, char * out );
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/// Decodes the given UTF-8 into UCS-32. The inSize specifies the number
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/// of bytes the 'in' pointer points to. The 'out' buffer must be at least
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/// inSize wide characters long. If the given UTF-8 is invalid, the decode
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/// function returns -1, otherwise it returns the number of wide characters
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/// stored in the 'out' buffer. The result is not 0-terminated.
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long decode( char const * in, size_t inSize, wchar * out );
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/// Versions for non time-critical code.
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string encode( wstring const & ) throw();
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wstring decode( string const & ) throw( exCantDecode );
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}
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