X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/22886fb3c34356d015591846f343344733a03149..f0cc899914c55916cf09a033a7b2865717caffc7:/include/wx/strconv.h diff --git a/include/wx/strconv.h b/include/wx/strconv.h index 53b74ca6cc..9ec0cdbc61 100644 --- a/include/wx/strconv.h +++ b/include/wx/strconv.h @@ -1,19 +1,20 @@ /////////////////////////////////////////////////////////////////////////////// -// Name: strconv.h +// Name: wx/strconv.h // Purpose: conversion routines for char sets any Unicode -// Author: Robert Roebling, Ove Kaaven +// Author: Ove Kaaven, Robert Roebling, Vadim Zeitlin // Modified by: // Created: 29/01/98 // RCS-ID: $Id$ -// Copyright: (c) 1998 Ove Kaaven, Robert Roebling, Vadim Zeitlin +// Copyright: (c) 1998 Ove Kaaven, Robert Roebling +// (c) 1998-2006 Vadim Zeitlin // Licence: wxWindows licence /////////////////////////////////////////////////////////////////////////////// -#ifndef _WX_WXSTRCONVH__ -#define _WX_WXSTRCONVH__ +#ifndef _WX_STRCONV_H_ +#define _WX_STRCONV_H_ #include "wx/defs.h" -#include "wx/wxchar.h" +#include "wx/chartype.h" #include "wx/buffer.h" #ifdef __DIGITALMARS__ @@ -24,50 +25,95 @@ # undef __BSEXCPT__ #endif +#ifndef __WXPALMOS5__ #include +#endif // ! __WXPALMOS5__ -#if wxUSE_WCHAR_T +class WXDLLIMPEXP_FWD_BASE wxString; + +// the error value returned by wxMBConv methods +#define wxCONV_FAILED ((size_t)-1) // ---------------------------------------------------------------------------- // wxMBConv (abstract base class for conversions) // ---------------------------------------------------------------------------- +// When deriving a new class from wxMBConv you must reimplement ToWChar() and +// FromWChar() methods which are not pure virtual only for historical reasons, +// don't let the fact that the existing classes implement MB2WC/WC2MB() instead +// confuse you. +// +// You also have to implement Clone() to allow copying the conversions +// polymorphically. +// +// And you might need to override GetMBNulLen() as well. class WXDLLIMPEXP_BASE wxMBConv { public: - // The functions doing actual conversion. On success, the return value is - // the length (i.e. the number of characters, not bytes, and not counting - // the trailing L'\0') of the converted string. On failure, (size_t)-1 is - // returned. In the special case when outputBuf is NULL the return value is - // the same one but nothing is written to the buffer. + // The functions doing actual conversion from/to narrow to/from wide + // character strings. // - // Note that outLen is the length of the output buffer, not the length of - // the input (which is always supposed to be terminated by one or more - // NULs, as appropriate for the encoding)! - virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const = 0; - virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const = 0; + // On success, the return value is the length (i.e. the number of + // characters, not bytes) of the converted string including any trailing + // L'\0' or (possibly multiple) '\0'(s). If the conversion fails or if + // 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 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 ) + // ... 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; + + virtual size_t FromWChar(char *dst, size_t dstLen, + const wchar_t *src, size_t srcLen = wxNO_LEN) const; + - // MB <-> WC + // Convenience functions for translating NUL-terminated strings: returns + // the buffer containing the converted string or NULL pointer if the + // conversion failed. const wxWCharBuffer cMB2WC(const char *in) const; const wxCharBuffer cWC2MB(const wchar_t *in) const; - // Functions converting strings which may contain embedded NULs and don't - // have to be NUL-terminated. + // 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); } @@ -81,19 +127,55 @@ public: const wxWCharBuffer cWX2WC(const char *psz) const { return cMB2WC(psz); } #endif // Unicode/ANSI - // virtual dtor for any base class - virtual ~wxMBConv(); + // this function is used in the implementation of cMB2WC() to distinguish + // between the following cases: + // + // a) var width encoding with strings terminated by a single NUL + // (usual multibyte encodings): return 1 in this case + // b) fixed width encoding with 2 bytes/char and so terminated by + // 2 NULs (UTF-16/UCS-2 and variants): return 2 in this case + // c) fixed width encoding with 4 bytes/char and so terminated by + // 4 NULs (UTF-32/UCS-4 and variants): return 4 in this case + // + // anything else is not supported currently and -1 should be returned + virtual size_t GetMBNulLen() const { return 1; } + + // return the maximal value currently returned by GetMBNulLen() for any + // encoding + static size_t GetMaxMBNulLen() { return 4 /* for UTF-32 */; } + +#if wxUSE_UNICODE_UTF8 + // return true if the converter's charset is UTF-8, i.e. char* strings + // decoded using this object can be directly copied to wxString's internal + // storage without converting to WC and than back to UTF-8 MB string + virtual bool IsUTF8() const { return false; } +#endif -private: - // this function must return the multibyte representation of L'\0' + // The old conversion functions. The existing classes currently mostly + // implement these ones but we're in transition to using To/FromWChar() + // instead and any new classes should implement just the new functions. + // For now, however, we provide default implementation of To/FromWChar() in + // this base class in terms of MB2WC/WC2MB() to avoid having to rewrite all + // the conversions at once. // - // on error, nulLen should be set to -1 - virtual const char *GetMBNul(size_t *nulLen) const - { - *nulLen = 1; + // On success, the return value is the length (i.e. the number of + // characters, not bytes) not counting the trailing NUL(s) of the converted + // string. On failure, (size_t)-1 is returned. In the special case when + // outputBuf is NULL the return value is the same one but nothing is + // written to the buffer. + // + // Note that outLen is the length of the output buffer, not the length of + // the input (which is always supposed to be terminated by one or more + // NULs, as appropriate for the encoding)! + virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const; + virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const; - return ""; - } + + // make a heap-allocated copy of this object + virtual wxMBConv *Clone() const = 0; + + // virtual dtor for any base class + virtual ~wxMBConv(); }; // ---------------------------------------------------------------------------- @@ -106,6 +188,12 @@ class WXDLLIMPEXP_BASE wxMBConvLibc : 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; + + virtual wxMBConv *Clone() const { return new wxMBConvLibc; } + +#if wxUSE_UNICODE_UTF8 + virtual bool IsUTF8() const { return wxLocaleIsUtf8; } +#endif }; #ifdef __UNIX__ @@ -120,7 +208,12 @@ 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) + { + } virtual ~wxConvBrokenFileNames() { delete m_conv; } virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const @@ -133,16 +226,23 @@ public: return m_conv->WC2MB(out, in, outLen); } -private: - virtual const char *GetMBNul(size_t *nulLen) const + virtual size_t GetMBNulLen() const { // cast needed to call a private function - return ((wxConvBrokenFileNames *)m_conv)->GetMBNul(nulLen); + return m_conv->GetMBNulLen(); } +#if wxUSE_UNICODE_UTF8 + virtual bool IsUTF8() const { return m_conv->IsUTF8(); } +#endif + + virtual wxMBConv *Clone() const { return new wxConvBrokenFileNames(*this); } +private: // the conversion object we forward to wxMBConv *m_conv; + + wxDECLARE_NO_ASSIGN_CLASS(wxConvBrokenFileNames); }; #endif // __UNIX__ @@ -154,26 +254,136 @@ 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: - enum { + // 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: + enum + { MAP_INVALID_UTF8_NOT = 0, MAP_INVALID_UTF8_TO_PUA = 1, MAP_INVALID_UTF8_TO_OCTAL = 2 }; 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); } + +#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 m_options == MAP_INVALID_UTF8_NOT; } +#endif private: int m_options; @@ -185,12 +395,17 @@ private: class WXDLLIMPEXP_BASE wxMBConvUTF16Base : public wxMBConv { -private: - virtual const char *GetMBNul(size_t *nulLen) const - { - *nulLen = 2; - return "\0"; - } +public: + enum { BYTES_PER_CHAR = 2 }; + + virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; } + +protected: + // return the length of the buffer using srcLen if it's not wxNO_LEN and + // computing the length ourselves if it is; also checks that the length is + // even if specified as we need an entire number of UTF-16 characters and + // returns wxNO_LEN which indicates error if it is odd + static size_t GetLength(const char *src, size_t srcLen); }; // ---------------------------------------------------------------------------- @@ -200,8 +415,11 @@ private: class WXDLLIMPEXP_BASE wxMBConvUTF16LE : public wxMBConvUTF16Base { 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; + 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 wxMBConvUTF16LE; } }; // ---------------------------------------------------------------------------- @@ -211,8 +429,11 @@ public: class WXDLLIMPEXP_BASE wxMBConvUTF16BE : public wxMBConvUTF16Base { 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; + 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 wxMBConvUTF16BE; } }; // ---------------------------------------------------------------------------- @@ -221,12 +442,16 @@ public: class WXDLLIMPEXP_BASE wxMBConvUTF32Base : public wxMBConv { -private: - virtual const char *GetMBNul(size_t *nulLen) const - { - *nulLen = 4; - return "\0\0\0"; - } +public: + enum { BYTES_PER_CHAR = 4 }; + + virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; } + +protected: + // this is similar to wxMBConvUTF16Base method with the same name except + // that, of course, it verifies that length is divisible by 4 if given and + // not by 2 + static size_t GetLength(const char *src, size_t srcLen); }; // ---------------------------------------------------------------------------- @@ -236,8 +461,11 @@ private: class WXDLLIMPEXP_BASE wxMBConvUTF32LE : public wxMBConvUTF32Base { 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; + 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 wxMBConvUTF32LE; } }; // ---------------------------------------------------------------------------- @@ -247,8 +475,11 @@ public: class WXDLLIMPEXP_BASE wxMBConvUTF32BE : public wxMBConvUTF32Base { 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; + 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 wxMBConvUTF32BE; } }; // ---------------------------------------------------------------------------- @@ -262,7 +493,7 @@ 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); @@ -270,36 +501,57 @@ public: wxCSConv& operator=(const wxCSConv& conv); - 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 size_t GetMBNulLen() const; + +#if wxUSE_UNICODE_UTF8 + virtual bool IsUTF8() const; +#endif + + virtual wxMBConv *Clone() const { return new wxCSConv(*this); } + + void Clear(); - void Clear() ; + // 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); - virtual const char *GetMBNul(size_t *nulLen) const; + // 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; }; @@ -307,14 +559,35 @@ private: // declare predefined conversion objects // ---------------------------------------------------------------------------- +// Note: this macro is an implementation detail (see the comment in +// strconv.cpp). The wxGet_XXX() and wxGet_XXXPtr() functions shouldn't be +// used by user code and neither should XXXPtr, use the wxConvXXX macro +// instead. +#define WX_DECLARE_GLOBAL_CONV(klass, name) \ + extern WXDLLIMPEXP_DATA_BASE(klass*) name##Ptr; \ + extern WXDLLIMPEXP_BASE klass* wxGet_##name##Ptr(); \ + inline klass& wxGet_##name() \ + { \ + if ( !name##Ptr ) \ + name##Ptr = wxGet_##name##Ptr(); \ + return *name##Ptr; \ + } + + // conversion to be used with all standard functions affected by locale, e.g. // strtol(), strftime(), ... -extern WXDLLIMPEXP_DATA_BASE(wxMBConv&) wxConvLibc; +WX_DECLARE_GLOBAL_CONV(wxMBConv, wxConvLibc) +#define wxConvLibc wxGet_wxConvLibc() // conversion ISO-8859-1/UTF-7/UTF-8 <-> wchar_t -extern WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvISO8859_1; -extern WXDLLIMPEXP_DATA_BASE(wxMBConvUTF7&) wxConvUTF7; -extern WXDLLIMPEXP_DATA_BASE(wxMBConvUTF8&) wxConvUTF8; +WX_DECLARE_GLOBAL_CONV(wxCSConv, wxConvISO8859_1) +#define wxConvISO8859_1 wxGet_wxConvISO8859_1() + +WX_DECLARE_GLOBAL_CONV(wxMBConvStrictUTF8, wxConvUTF8) +#define wxConvUTF8 wxGet_wxConvUTF8() + +WX_DECLARE_GLOBAL_CONV(wxMBConvUTF7, wxConvUTF7) +#define wxConvUTF7 wxGet_wxConvUTF7() // conversion used for the file names on the systems where they're not Unicode // (basically anything except Windows) @@ -332,9 +605,17 @@ extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvFileName; // default in a couple of places inside wx (initially same as wxConvLibc) extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent; -// ??? -extern WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvLocal; +// the conversion corresponding to the current locale +WX_DECLARE_GLOBAL_CONV(wxCSConv, wxConvLocal) +#define wxConvLocal wxGet_wxConvLocal() +// the conversion corresponding to the encoding of the standard UI elements +// +// by default this is the same as wxConvLocal but may be changed if the program +// needs to use a fixed encoding +extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvUI; + +#undef WX_DECLARE_GLOBAL_CONV // ---------------------------------------------------------------------------- // endianness-dependent conversions @@ -352,18 +633,12 @@ extern WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvLocal; // filename conversion macros // ---------------------------------------------------------------------------- -// filenames are multibyte on Unix and probably widechar on Windows? -#if defined(__UNIX__) || defined(__BORLANDC__) || defined(__WXMAC__ ) - #define wxMBFILES 1 -#else - #define wxMBFILES 0 -#endif - +// filenames are multibyte on Unix and widechar on Windows #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 @@ -371,33 +646,6 @@ extern WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvLocal; #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 // ---------------------------------------------------------------------------- @@ -405,12 +653,26 @@ extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent; #if wxUSE_UNICODE #define wxConvertWX2MB(s) wxConvCurrent->cWX2MB(s) #define wxConvertMB2WX(s) wxConvCurrent->cMB2WX(s) + + // these functions should be used when the conversions really, really have + // to succeed (usually because we pass their results to a standard C + // function which would crash if we passed NULL to it), so these functions + // always return a valid pointer if their argument is non-NULL + + // this function safety is achieved by trying wxConvLibc first, wxConvUTF8 + // next if it fails and, finally, wxConvISO8859_1 which always succeeds + extern WXDLLIMPEXP_BASE wxWCharBuffer wxSafeConvertMB2WX(const char *s); + + // this function uses wxConvLibc and wxConvUTF8(MAP_INVALID_UTF8_TO_OCTAL) + // if it fails + extern WXDLLIMPEXP_BASE wxCharBuffer wxSafeConvertWX2MB(const wchar_t *ws); #else // ANSI // no conversions to do #define wxConvertWX2MB(s) (s) #define wxConvertMB2WX(s) (s) + #define wxSafeConvertMB2WX(s) (s) + #define wxSafeConvertWX2MB(s) (s) #endif // Unicode/ANSI -#endif - // _WX_WXSTRCONVH__ +#endif // _WX_STRCONV_H_