64 lines
2.5 KiB
C++
64 lines
2.5 KiB
C++
#ifndef CUNICODE_H
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#define CUNICODE_H
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#include "CString.h"
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#include "BasicTypes.h"
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#include <wchar.h>
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class CUnicode {
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public:
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// returns true iff the string contains a valid sequence of UTF-8
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// encoded characters.
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static bool isUTF8(const CString&);
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// convert from UTF-8 encoding to other encodings. if errors is
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// not NULL then it gets true if any characters could not be
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// encoded in the target encoding and false otherwise. note
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// that decoding errors do not set errors to error. UTF8ToText()
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// converts to the current locale's (multibyte) encoding.
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static CString UTF8ToUCS2(const CString&, bool* errors = NULL);
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static CString UTF8ToUCS4(const CString&, bool* errors = NULL);
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static CString UTF8ToUTF16(const CString&, bool* errors = NULL);
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static CString UTF8ToUTF32(const CString&, bool* errors = NULL);
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static CString UTF8ToText(const CString&, bool* errors = NULL);
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// convert from some encoding to UTF-8. if errors is not NULL
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// then it gets true if any characters could not be decoded and
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// false otherwise. textToUTF8() converts from the current
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// locale's (multibyte) encoding.
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static CString UCS2ToUTF8(const CString&, bool* errors = NULL);
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static CString UCS4ToUTF8(const CString&, bool* errors = NULL);
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static CString UTF16ToUTF8(const CString&, bool* errors = NULL);
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static CString UTF32ToUTF8(const CString&, bool* errors = NULL);
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static CString textToUTF8(const CString&, bool* errors = NULL);
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private:
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// convert UTF8 to wchar_t string (using whatever encoding is native
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// to the platform). caller must delete[] the returned string. the
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// string is *not* nul terminated; the length (in characters) is
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// returned in size.
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static wchar_t* UTF8ToWideChar(const CString&,
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UInt32& size, bool* errors);
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// convert nul terminated wchar_t string (in platform's native
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// encoding) to UTF8.
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static CString wideCharToUTF8(const wchar_t*,
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UInt32 size, bool* errors);
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// internal conversion to UTF8
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static CString doUCS2ToUTF8(const UInt8* src, UInt32 n, bool* errors);
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static CString doUCS4ToUTF8(const UInt8* src, UInt32 n, bool* errors);
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static CString doUTF16ToUTF8(const UInt8* src, UInt32 n, bool* errors);
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static CString doUTF32ToUTF8(const UInt8* src, UInt32 n, bool* errors);
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// convert characters to/from UTF8
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static UInt32 fromUTF8(const UInt8*& src, UInt32& size);
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static void toUTF8(CString& dst, UInt32 c, bool* errors);
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private:
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static UInt32 s_invalid;
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static UInt32 s_replacement;
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};
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#endif
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