///////////////////////////////////////////////////////////////////////////// // Name: strconv.h // Purpose: documentation for wxMBConvUTF7 class // Author: wxWidgets team // RCS-ID: $Id$ // Licence: wxWindows license ///////////////////////////////////////////////////////////////////////////// /** @class wxMBConvUTF7 @wxheader{strconv.h} This class converts between the UTF-7 encoding and Unicode. It has one predefined instance, @b wxConvUTF7. @b WARNING: this class is not implemented yet. @library{wxbase} @category{FIXME} @seealso wxMBConvUTF8, @ref overview_mbconvclasses "wxMBConv classes overview" */ class wxMBConvUTF7 : public wxMBConv { public: /** Converts from UTF-7 encoding to Unicode. Returns the size of the destination buffer. */ size_t MB2WC(wchar_t* buf, const char* psz, size_t n) const; /** Converts from Unicode to UTF-7 encoding. Returns the size of the destination buffer. */ size_t WC2MB(char* buf, const wchar_t* psz, size_t n) const; }; /** @class wxMBConvUTF8 @wxheader{strconv.h} This class converts between the UTF-8 encoding and Unicode. It has one predefined instance, @b wxConvUTF8. @library{wxbase} @category{FIXME} @seealso wxMBConvUTF7, @ref overview_mbconvclasses "wxMBConv classes overview" */ class wxMBConvUTF8 : public wxMBConv { public: /** Converts from UTF-8 encoding to Unicode. Returns the size of the destination buffer. */ size_t MB2WC(wchar_t* buf, const char* psz, size_t n) const; /** Converts from Unicode to UTF-8 encoding. Returns the size of the destination buffer. */ size_t WC2MB(char* buf, const wchar_t* psz, size_t n) const; }; /** @class wxMBConvUTF16 @wxheader{strconv.h} This class is used to convert between multibyte encodings and UTF-16 Unicode encoding (also known as UCS-2). Unlike UTF-8 encoding, UTF-16 uses words and not bytes and hence depends on the byte ordering: big or little endian. Hence this class is provided in two versions: wxMBConvUTF16LE and wxMBConvUTF16BE and wxMBConvUTF16 itself is just a typedef for one of them (native for the given platform, e.g. LE under Windows and BE under Mac). @library{wxbase} @category{FIXME} @seealso wxMBConvUTF8, wxMBConvUTF32, @ref overview_mbconvclasses "wxMBConv classes overview" */ class wxMBConvUTF16 : public wxMBConv { public: /** Converts from UTF-16 encoding to Unicode. Returns the size of the destination buffer. */ size_t MB2WC(wchar_t* buf, const char* psz, size_t n) const; /** Converts from Unicode to UTF-16 encoding. Returns the size of the destination buffer. */ size_t WC2MB(char* buf, const wchar_t* psz, size_t n) const; }; /** @class wxCSConv @wxheader{strconv.h} This class converts between any character sets and Unicode. It has one predefined instance, @b wxConvLocal, for the default user character set. @library{wxbase} @category{FIXME} @seealso wxMBConv, wxEncodingConverter, @ref overview_mbconvclasses "wxMBConv classes overview" */ class wxCSConv : public wxMBConv { public: //@{ /** Constructor. You may specify either the name of the character set you want to convert from/to or an encoding constant. If the character set name (or the encoding) is not recognized, ISO 8859-1 is used as fall back. */ wxCSConv(const wxChar* charset); wxCSConv(wxFontEncoding encoding); //@} /** Destructor frees any resources needed to perform the conversion. */ ~wxCSConv(); /** Returns @true if the charset (or the encoding) given at constructor is really available to use. Returns @false if ISO 8859-1 will be used instead. Note this does not mean that a given string will be correctly converted. A malformed string may still make conversion functions return @c wxCONV_FAILED. This function is new since wxWidgets version 2.8.2 */ bool IsOk() const; /** Converts from the selected character set to Unicode. Returns length of string written to destination buffer. */ size_t MB2WC(wchar_t* buf, const char* psz, size_t n) const; /** Converts from Unicode to the selected character set. Returns length of string written to destination buffer. */ size_t WC2MB(char* buf, const wchar_t* psz, size_t n) const; }; /** @class wxMBConvFile @wxheader{strconv.h} This class used to define the class instance @b wxConvFileName, but nowadays @b wxConvFileName is either of type wxConvLibc (on most platforms) or wxConvUTF8 (on MacOS X). @b wxConvFileName converts filenames between filesystem multibyte encoding and Unicode. @b wxConvFileName can also be set to a something else at run-time which is used e.g. by wxGTK to use a class which checks the environment variable @b G_FILESYSTEM_ENCODING indicating that filenames should not be interpreted as UTF8 and also for converting invalid UTF8 characters (e.g. if there is a filename in iso8859_1) to strings with octal values. Since some platforms (such as Win32) use Unicode in the filenames, and others (such as Unix) use multibyte encodings, this class should only be used directly if wxMBFILES is defined to 1. A convenience macro, wxFNCONV, is defined to wxConvFileName-cWX2MB in this case. You could use it like this: @code wxChar *name = wxT("rawfile.doc"); FILE *fil = fopen(wxFNCONV(name), "r"); @endcode (although it would be better to use wxFopen(name, wxT("r")) in this case.) @library{wxbase} @category{FIXME} @seealso @ref overview_mbconvclasses "wxMBConv classes overview" */ class wxMBConvFile : public wxMBConv { public: /** Converts from multibyte filename encoding to Unicode. Returns the size of the destination buffer. */ size_t MB2WC(wchar_t* buf, const char* psz, size_t n) const; /** Converts from Unicode to multibyte filename encoding. Returns the size of the destination buffer. */ size_t WC2MB(char* buf, const wchar_t* psz, size_t n) const; }; /** @class wxMBConvUTF32 @wxheader{strconv.h} This class is used to convert between multibyte encodings and UTF-32 Unicode encoding (also known as UCS-4). Unlike UTF-8 encoding, UTF-32 uses (double) words and not bytes and hence depends on the byte ordering: big or little endian. Hence this class is provided in two versions: wxMBConvUTF32LE and wxMBConvUTF32BE and wxMBConvUTF32 itself is just a typedef for one of them (native for the given platform, e.g. LE under Windows and BE under Mac). @library{wxbase} @category{FIXME} @seealso wxMBConvUTF8, wxMBConvUTF16, @ref overview_mbconvclasses "wxMBConv classes overview" */ class wxMBConvUTF32 : public wxMBConv { public: /** Converts from UTF-32 encoding to Unicode. Returns the size of the destination buffer. */ size_t MB2WC(wchar_t* buf, const char* psz, size_t n) const; /** Converts from Unicode to UTF-32 encoding. Returns the size of the destination buffer. */ size_t WC2MB(char* buf, const wchar_t* psz, size_t n) const; }; /** @class wxMBConv @wxheader{strconv.h} This class is the base class of a hierarchy of classes capable of converting text strings between multibyte (SBCS or DBCS) encodings and Unicode. In the documentation for this and related classes please notice that length of the string refers to the number of characters in the string not counting the terminating @c NUL, if any. While the size of the string is the total number of bytes in the string, including any trailing @c NUL. Thus, length of wide character string @c L"foo" is 3 while its size can be either 8 or 16 depending on whether @c wchar_t is 2 bytes (as under Windows) or 4 (Unix). @library{wxbase} @category{FIXME} @seealso wxCSConv, wxEncodingConverter, @ref overview_mbconvclasses "wxMBConv classes overview" */ class wxMBConv { public: /** Trivial default constructor. */ wxMBConv(); /** This pure virtual function is overridden in each of the derived classes to return a new copy of the object it is called on. It is used for copying the conversion objects while preserving their dynamic type. */ virtual wxMBConv* Clone() const; /** This function has the same semantics as ToWChar() except that it converts a wide string to multibyte one. */ virtual size_t FromWChar(char* dst, size_t dstLen, const wchar_t* src, size_t srcLen = wxNO_LEN) const; /** This function returns 1 for most of the multibyte encodings in which the string is terminated by a single @c NUL, 2 for UTF-16 and 4 for UTF-32 for which the string is terminated with 2 and 4 @c NUL characters respectively. The other cases are not currently supported and @c wxCONV_FAILED (defined as -1) is returned for them. */ size_t GetMBNulLen() const; /** Returns the maximal value which can be returned by GetMBNulLen() for any conversion object. Currently this value is 4. This method can be used to allocate the buffer with enough space for the trailing @c NUL characters for any encoding. */ const size_t GetMaxMBNulLen(); /** This function is deprecated, please use ToWChar() instead Converts from a string @a in in multibyte encoding to Unicode putting up to @a outLen characters into the buffer @e out. If @a out is @NULL, only the length of the string which would result from the conversion is calculated and returned. Note that this is the length and not size, i.e. the returned value does not include the trailing @c NUL. But when the function is called with a non-@NULL @a out buffer, the @a outLen parameter should be one more to allow to properly @c NUL-terminate the string. @param out The output buffer, may be @NULL if the caller is only interested in the length of the resulting string @param in The NUL-terminated input string, cannot be @NULL @param outLen The length of the output buffer but including NUL, ignored if out is @NULL @returns The length of the converted string excluding the trailing NUL. */ virtual size_t MB2WC(wchar_t* out, const char* in, size_t outLen) const; /** The most general function for converting a multibyte string to a wide string. The main case is when @a dst is not @NULL and @a srcLen is not @c wxNO_LEN (which is defined as @c (size_t)-1): then the function converts exactly @a srcLen bytes starting at @a src into wide string which it output to @e dst. If the length of the resulting wide string is greater than @e dstLen, an error is returned. Note that if @a srcLen bytes don't include @c NUL characters, the resulting wide string is not @c NUL-terminated neither. If @a srcLen is @c wxNO_LEN, the function supposes that the string is properly (i.e. as necessary for the encoding handled by this conversion) @c NUL-terminated and converts the entire string, including any trailing @c NUL bytes. In this case the wide string is also @c NUL-terminated. Finally, if @a dst is @NULL, the function returns the length of the needed buffer. */ virtual size_t ToWChar(wchar_t* dst, size_t dstLen, const char* src, size_t srcLen = wxNO_LEN) const; /** This function is deprecated, please use FromWChar() instead Converts from Unicode to multibyte encoding. The semantics of this function (including the return value meaning) is the same as for wxMBConv::MB2WC. Notice that when the function is called with a non-@NULL buffer, the @a n parameter should be the size of the buffer and so it should take into account the trailing @c NUL, which might take two or four bytes for some encodings (UTF-16 and UTF-32) and not one. */ virtual size_t WC2MB(char* buf, const wchar_t* psz, size_t n) const; //@{ /** Converts from multibyte encoding to Unicode by calling wxMBConv::MB2WC, allocating a temporary wxWCharBuffer to hold the result. The first overload takes a @c NUL-terminated input string. The second one takes a string of exactly the specified length and the string may include or not the trailing @c NUL character(s). If the string is not @c NUL-terminated, a temporary @c NUL-terminated copy of it suitable for passing to wxMBConv::MB2WC is made, so it is more efficient to ensure that the string is does have the appropriate number of @c NUL bytes (which is usually 1 but may be 2 or 4 for UTF-16 or UTF-32, see wxMBConv::GetMBNulLen), especially for long strings. If @a outLen is not-@NULL, it receives the length of the converted string. */ const wxWCharBuffer cMB2WC(const char* in) const; const const wxWCharBuffer cMB2WC(const char* in, size_t inLen, size_t outLen) const; //@} //@{ /** Converts from multibyte encoding to the current wxChar type (which depends on whether wxUSE_UNICODE is set to 1). If wxChar is char, it returns the parameter unaltered. If wxChar is wchar_t, it returns the result in a wxWCharBuffer. The macro wxMB2WXbuf is defined as the correct return type (without const). */ const char* cMB2WX(const char* psz) const; const const wxWCharBuffer cMB2WX(const char* psz) const; //@} //@{ /** Converts from Unicode to multibyte encoding by calling WC2MB, allocating a temporary wxCharBuffer to hold the result. The second overload of this function allows to convert a string of the given length @e inLen, whether it is @c NUL-terminated or not (for wide character strings, unlike for the multibyte ones, a single @c NUL is always enough). But notice that just as with @ref wxMBConv::mb2wc cMB2WC, it is more efficient to pass an already terminated string to this function as otherwise a copy is made internally. If @a outLen is not-@NULL, it receives the length of the converted string. */ const wxCharBuffer cWC2MB(const wchar_t* in) const; const const wxCharBuffer cWC2MB(const wchar_t* in, size_t inLen, size_t outLen) const; //@} //@{ /** Converts from Unicode to the current wxChar type. If wxChar is wchar_t, it returns the parameter unaltered. If wxChar is char, it returns the result in a wxCharBuffer. The macro wxWC2WXbuf is defined as the correct return type (without const). */ const wchar_t* cWC2WX(const wchar_t* psz) const; const const wxCharBuffer cWC2WX(const wchar_t* psz) const; //@} //@{ /** Converts from the current wxChar type to multibyte encoding. If wxChar is char, it returns the parameter unaltered. If wxChar is wchar_t, it returns the result in a wxCharBuffer. The macro wxWX2MBbuf is defined as the correct return type (without const). */ const char* cWX2MB(const wxChar* psz) const; const const wxCharBuffer cWX2MB(const wxChar* psz) const; //@} //@{ /** Converts from the current wxChar type to Unicode. If wxChar is wchar_t, it returns the parameter unaltered. If wxChar is char, it returns the result in a wxWCharBuffer. The macro wxWX2WCbuf is defined as the correct return type (without const). */ const wchar_t* cWX2WC(const wxChar* psz) const; const const wxWCharBuffer cWX2WC(const wxChar* psz) const; //@} };