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// Copyright (c) 1997 James Clark
// See the file COPYING for copying permission.
#ifndef TranslateCodingSystem_INCLUDED
#define TranslateCodingSystem_INCLUDED 1
#include "CodingSystem.h"
#include "Ptr.h"
#include "CharMap.h"
#include "CharsetRegistry.h"
#include "types.h"
#ifdef SP_NAMESPACE
namespace SP_NAMESPACE {
#endif
class SP_API TranslateCodingSystem : public CodingSystem {
public:
struct Desc {
CharsetRegistry::ISORegistrationNumber number;
// How much to add to the values in the base set.
Char add;
};
// codingSystem is the underlying BCTF
// desc describes the meaning of the bit combinations produced by that BCTF
// charset is the system character set
// replacementChar is character in systemCharset that should be used to represent
// characters that do not exist in the systemCharset.
// illegalChar is a code that can never be produced by the underlying BCTF.
TranslateCodingSystem(const CodingSystem *codingSystem,
const Desc *desc,
const CharsetInfo *charset,
Char illegalChar,
Char replacementChar);
Decoder *makeDecoder() const;
Encoder *makeEncoder() const;
unsigned fixedBytesPerChar() const;
private:
ConstPtr<CharMapResource<Char> > decodeMap_;
ConstPtr<CharMapResource<Char> > encodeMap_;
const CodingSystem *sub_;
const Desc *desc_;
const CharsetInfo *charset_;
Char illegalChar_;
Char replacementChar_;
};
#ifdef SP_NAMESPACE
}
#endif
#endif /* not TranslateCodingSystem_INCLUDED */
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