X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/ba98e032a7d195fc94d3856bcd8f4cf4b4b01b4c..a7689c49fe02c0c065facf736ab28b19f5997b7c:/include/wx/strconv.h diff --git a/include/wx/strconv.h b/include/wx/strconv.h index d953b892af..d7bf584137 100644 --- a/include/wx/strconv.h +++ b/include/wx/strconv.h @@ -1,5 +1,5 @@ /////////////////////////////////////////////////////////////////////////////// -// Name: strconv.h +// Name: wx/strconv.h // Purpose: conversion routines for char sets any Unicode // Author: Ove Kaaven, Robert Roebling, Vadim Zeitlin // Modified by: @@ -27,15 +27,11 @@ #include -#if wxUSE_WCHAR_T +class WXDLLIMPEXP_FWD_BASE wxString; // the error value returned by wxMBConv methods #define wxCONV_FAILED ((size_t)-1) -// the default value for some length parameters meaning that the string is -// NUL-terminated -#define wxNO_LEN ((size_t)-1) - // ---------------------------------------------------------------------------- // wxMBConv (abstract base class for conversions) // ---------------------------------------------------------------------------- @@ -61,19 +57,21 @@ public: // there is not enough space for everything, including the trailing NUL // character(s), in the output buffer, wxCONV_FAILED is returned. // - // In the special case when dstLen is 0 (outputBuf may be NULL then) the - // return value is the length of the needed buffer but nothing happens - // otherwise. If srcLen is wxNO_LEN, the entire string, up to and + // In the special case when dst is NULL (the value of dstLen is ignored + // then) the return value is the length of the needed buffer but nothing + // happens otherwise. If srcLen is wxNO_LEN, the entire string, up to and // including the trailing NUL(s), is converted, otherwise exactly srcLen // bytes are. // // Typical usage: // // size_t dstLen = conv.ToWChar(NULL, 0, src); - // if ( dstLen != wxCONV_FAILED ) + // if ( dstLen == wxCONV_FAILED ) // ... handle error ... // wchar_t *wbuf = new wchar_t[dstLen]; // conv.ToWChar(wbuf, dstLen, src); + // ... work with wbuf ... + // delete [] wbuf; // virtual size_t ToWChar(wchar_t *dst, size_t dstLen, const char *src, size_t srcLen = wxNO_LEN) const; @@ -91,20 +89,29 @@ public: // Convenience functions for converting strings which may contain embedded // NULs and don't have to be NUL-terminated. // - // inLen is the length of the buffer including trailing NUL if any: if the - // last 4 bytes of the buffer are all NULs, these functions are more - // efficient as they avoid copying the string, but otherwise a copy is made - // internally which could be quite bad for (very) long strings. + // inLen is the length of the buffer including trailing NUL if any or + // wxNO_LEN if the input is NUL-terminated. // // outLen receives, if not NULL, the length of the converted string or 0 if // the conversion failed (returning 0 and not -1 in this case makes it // difficult to distinguish between failed conversion and empty input but - // this is done for backwards compatibility) + // this is done for backwards compatibility). Notice that the rules for + // whether outLen accounts or not for the last NUL are the same as for + // To/FromWChar() above: if inLen is specified, outLen is exactly the + // number of characters converted, whether the last one of them was NUL or + // not. But if inLen == wxNO_LEN then outLen doesn't account for the last + // NUL even though it is present. const wxWCharBuffer cMB2WC(const char *in, size_t inLen, size_t *outLen) const; const wxCharBuffer cWC2MB(const wchar_t *in, size_t inLen, size_t *outLen) const; + // And yet more convenience functions for converting the entire buffers: + // these are the simplest and least error-prone as you never need to bother + // with lengths/sizes directly. + const wxWCharBuffer cMB2WC(const wxScopedCharBuffer& in) const; + const wxCharBuffer cWC2MB(const wxScopedWCharBuffer& in) const; + // convenience functions for converting MB or WC to/from wxWin default #if wxUSE_UNICODE const wxWCharBuffer cMB2WX(const char *psz) const { return cMB2WC(psz); } @@ -199,7 +206,7 @@ public: class WXDLLIMPEXP_BASE wxConvBrokenFileNames : public wxMBConv { public: - wxConvBrokenFileNames(const wxChar *charset); + wxConvBrokenFileNames(const wxString& charset); wxConvBrokenFileNames(const wxConvBrokenFileNames& conv) : wxMBConv(), m_conv(conv.m_conv ? conv.m_conv->Clone() : NULL) @@ -233,7 +240,7 @@ private: // the conversion object we forward to wxMBConv *m_conv; - DECLARE_NO_ASSIGN_CLASS(wxConvBrokenFileNames) + wxDECLARE_NO_ASSIGN_CLASS(wxConvBrokenFileNames); }; #endif // __UNIX__ @@ -245,21 +252,115 @@ private: class WXDLLIMPEXP_BASE wxMBConvUTF7 : public wxMBConv { public: - virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const; - virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const; + wxMBConvUTF7() { } + + // compiler-generated copy ctor, assignment operator and dtor are ok + // (assuming it's ok to copy the shift state -- not really sure about it) + + virtual size_t ToWChar(wchar_t *dst, size_t dstLen, + const char *src, size_t srcLen = wxNO_LEN) const; + virtual size_t FromWChar(char *dst, size_t dstLen, + const wchar_t *src, size_t srcLen = wxNO_LEN) const; virtual wxMBConv *Clone() const { return new wxMBConvUTF7; } + +private: + // UTF-7 decoder/encoder may be in direct mode or in shifted mode after a + // '+' (and until the '-' or any other non-base64 character) + struct StateMode + { + enum Mode + { + Direct, // pass through state + Shifted // after a '+' (and before '-') + }; + }; + + // the current decoder state: this is only used by ToWChar() if srcLen + // parameter is not wxNO_LEN, when working on the entire NUL-terminated + // strings we neither update nor use the state + class DecoderState : private StateMode + { + private: + // current state: this one is private as we want to enforce the use of + // ToDirect/ToShifted() methods below + Mode mode; + + public: + // the initial state is direct + DecoderState() { mode = Direct; } + + // switch to/from shifted mode + void ToDirect() { mode = Direct; } + void ToShifted() { mode = Shifted; accum = bit = 0; isLSB = false; } + + bool IsDirect() const { return mode == Direct; } + bool IsShifted() const { return mode == Shifted; } + + + // these variables are only used in shifted mode + + unsigned int accum; // accumulator of the bit we've already got + unsigned int bit; // the number of bits consumed mod 8 + unsigned char msb; // the high byte of UTF-16 word + bool isLSB; // whether we're decoding LSB or MSB of UTF-16 word + }; + + DecoderState m_stateDecoder; + + + // encoder state is simpler as we always receive entire Unicode characters + // on input + class EncoderState : private StateMode + { + private: + Mode mode; + + public: + EncoderState() { mode = Direct; } + + void ToDirect() { mode = Direct; } + void ToShifted() { mode = Shifted; accum = bit = 0; } + + bool IsDirect() const { return mode == Direct; } + bool IsShifted() const { return mode == Shifted; } + + unsigned int accum; + unsigned int bit; + }; + + EncoderState m_stateEncoder; }; // ---------------------------------------------------------------------------- // wxMBConvUTF8 (for conversion using UTF8 encoding) // ---------------------------------------------------------------------------- -class WXDLLIMPEXP_BASE wxMBConvUTF8 : public wxMBConv +// this is the real UTF-8 conversion class, it has to be called "strict UTF-8" +// for compatibility reasons: the wxMBConvUTF8 class below also supports lossy +// conversions if it is created with non default options +class WXDLLIMPEXP_BASE wxMBConvStrictUTF8 : public wxMBConv +{ +public: + // compiler-generated default ctor and other methods are ok + + virtual size_t ToWChar(wchar_t *dst, size_t dstLen, + const char *src, size_t srcLen = wxNO_LEN) const; + virtual size_t FromWChar(char *dst, size_t dstLen, + const wchar_t *src, size_t srcLen = wxNO_LEN) const; + + virtual wxMBConv *Clone() const { return new wxMBConvStrictUTF8(); } + +#if wxUSE_UNICODE_UTF8 + // NB: other mapping modes are not, strictly speaking, UTF-8, so we can't + // take the shortcut in that case + virtual bool IsUTF8() const { return true; } +#endif +}; + +class WXDLLIMPEXP_BASE wxMBConvUTF8 : public wxMBConvStrictUTF8 { public: - // FIXME-UTF8: split this class into multiple classes, one strict and - // other lossy (PUA, OCTAL mappings) enum { MAP_INVALID_UTF8_NOT = 0, @@ -268,8 +369,11 @@ public: }; wxMBConvUTF8(int options = MAP_INVALID_UTF8_NOT) : m_options(options) { } - virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const; - virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const; + + virtual size_t ToWChar(wchar_t *dst, size_t dstLen, + const char *src, size_t srcLen = wxNO_LEN) const; + virtual size_t FromWChar(char *dst, size_t dstLen, + const wchar_t *src, size_t srcLen = wxNO_LEN) const; virtual wxMBConv *Clone() const { return new wxMBConvUTF8(m_options); } @@ -387,7 +491,7 @@ class WXDLLIMPEXP_BASE wxCSConv : public wxMBConv public: // we can be created either from charset name or from an encoding constant // but we can't have both at once - wxCSConv(const wxChar *charset); + wxCSConv(const wxString& charset); wxCSConv(wxFontEncoding encoding); wxCSConv(const wxCSConv& conv); @@ -399,8 +503,6 @@ public: const char *src, size_t srcLen = wxNO_LEN) const; virtual size_t FromWChar(char *dst, size_t dstLen, const wchar_t *src, size_t srcLen = wxNO_LEN) const; - virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const; - virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const; virtual size_t GetMBNulLen() const; #if wxUSE_UNICODE_UTF8 @@ -411,32 +513,43 @@ public: void Clear(); - // return true if the conversion could be initilized successfully + // return true if the conversion could be initialized successfully bool IsOk() const; private: // common part of all ctors void Init(); - // creates m_convReal if necessary - void CreateConvIfNeeded() const; - - // do create m_convReal (unconditionally) + // Creates the conversion to use, called from all ctors to initialize + // m_convReal. wxMBConv *DoCreate() const; - // set the name (may be only called when m_name == NULL), makes copy of - // charset string - void SetName(const wxChar *charset); + // Set the name (may be only called when m_name == NULL), makes copy of + // the charset string. + void SetName(const char *charset); + + // Set m_encoding field respecting the rules below, i.e. making sure it has + // a valid value if m_name == NULL (thus this should be always called after + // SetName()). + // + // Input encoding may be valid or not. + void SetEncoding(wxFontEncoding encoding); - // note that we can't use wxString here because of compilation - // dependencies: we're included from wx/string.h - wxChar *m_name; + // The encoding we use is specified by the two fields below: + // + // 1. If m_name != NULL, m_encoding corresponds to it if it's one of + // encodings we know about (i.e. member of wxFontEncoding) or is + // wxFONTENCODING_SYSTEM otherwise. + // + // 2. If m_name == NULL, m_encoding is always valid, i.e. not one of + // wxFONTENCODING_{SYSTEM,DEFAULT,MAX}. + char *m_name; wxFontEncoding m_encoding; - // use CreateConvIfNeeded() before accessing m_convReal! + // The conversion object for our encoding or NULL if we failed to create it + // in which case we fall back to hard-coded ISO8859-1 conversion. wxMBConv *m_convReal; - bool m_deferred; }; @@ -468,7 +581,7 @@ WX_DECLARE_GLOBAL_CONV(wxMBConv, wxConvLibc) WX_DECLARE_GLOBAL_CONV(wxCSConv, wxConvISO8859_1) #define wxConvISO8859_1 wxGet_wxConvISO8859_1() -WX_DECLARE_GLOBAL_CONV(wxMBConvUTF8, wxConvUTF8) +WX_DECLARE_GLOBAL_CONV(wxMBConvStrictUTF8, wxConvUTF8) #define wxConvUTF8 wxGet_wxConvUTF8() WX_DECLARE_GLOBAL_CONV(wxMBConvUTF7, wxConvUTF7) @@ -519,17 +632,11 @@ extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvUI; // ---------------------------------------------------------------------------- // filenames are multibyte on Unix and widechar on Windows -#if defined(__UNIX__) || defined(__WXMAC__) - #define wxMBFILES 1 -#else - #define wxMBFILES 0 -#endif - #if wxMBFILES && wxUSE_UNICODE #define wxFNCONV(name) wxConvFileName->cWX2MB(name) #define wxFNSTRINGCAST wxMBSTRINGCAST #else -#if defined( __WXOSX__ ) && wxMBFILES +#if defined( __WXOSX_OR_COCOA__ ) && wxMBFILES #define wxFNCONV(name) wxConvFileName->cWC2MB( wxConvLocal.cWX2WC(name) ) #else #define wxFNCONV(name) name @@ -537,33 +644,6 @@ extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvUI; #define wxFNSTRINGCAST WXSTRINGCAST #endif -#else // !wxUSE_WCHAR_T - -// ---------------------------------------------------------------------------- -// stand-ins in absence of wchar_t -// ---------------------------------------------------------------------------- - -class WXDLLIMPEXP_BASE wxMBConv -{ -public: - const char* cMB2WX(const char *psz) const { return psz; } - const char* cWX2MB(const char *psz) const { return psz; } -}; - -#define wxConvFile wxConvLocal - -extern WXDLLIMPEXP_DATA_BASE(wxMBConv) wxConvLibc, - wxConvLocal, - wxConvISO8859_1, - wxConvUTF8; -extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent; - -#define wxFNCONV(name) name -#define wxFNSTRINGCAST WXSTRINGCAST - -#endif - // wxUSE_WCHAR_T - // ---------------------------------------------------------------------------- // macros for the most common conversions // ----------------------------------------------------------------------------