X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/12028905135250524409f1e7b9bfa9c55e5ce16b..3f69756e3d68cc8a04b95c95df211295d2ac0ec8:/include/wx/strconv.h diff --git a/include/wx/strconv.h b/include/wx/strconv.h index 16be8b1aee..c56ae9af2f 100644 --- a/include/wx/strconv.h +++ b/include/wx/strconv.h @@ -1,20 +1,17 @@ /////////////////////////////////////////////////////////////////////////////// // Name: 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__ - -#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA) - #pragma interface "strconv.h" -#endif +#ifndef _WX_STRCONV_H_ +#define _WX_STRCONV_H_ #include "wx/defs.h" #include "wx/wxchar.h" @@ -32,21 +29,83 @@ #if wxUSE_WCHAR_T +// 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 (base class for conversions, using libc conversion itself) +// 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 actual conversion takes place here - virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const; - virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const; - - // No longer inline since BC++ complains. - const wxWCharBuffer cMB2WC(const char *psz) const; - const wxCharBuffer cWC2MB(const wchar_t *psz) const; - + // The functions doing actual conversion from/to narrow to/from wide + // character strings. + // + // 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 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 + // 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); + // + 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; + + + // 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; + + // 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. + // + // 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) + 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; + + // convenience functions for converting MB or WC to/from wxWin default #if wxUSE_UNICODE const wxWCharBuffer cMB2WX(const char *psz) const { return cMB2WC(psz); } const wxCharBuffer cWX2MB(const wchar_t *psz) const { return cWC2MB(psz); } @@ -59,11 +118,111 @@ public: const wxWCharBuffer cWX2WC(const char *psz) const { return cMB2WC(psz); } #endif // Unicode/ANSI + // 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 */; } + + + // 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 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; + + + // make a heap-allocated copy of this object + virtual wxMBConv *Clone() const = 0; + // virtual dtor for any base class virtual ~wxMBConv(); }; -WXDLLIMPEXP_DATA_BASE(extern wxMBConv) wxConvLibc; +// ---------------------------------------------------------------------------- +// wxMBConvLibc uses standard mbstowcs() and wcstombs() functions for +// conversion (hence it depends on the current locale) +// ---------------------------------------------------------------------------- + +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; } +}; + +#ifdef __UNIX__ + +// ---------------------------------------------------------------------------- +// wxConvBrokenFileNames is made for Unix in Unicode mode when +// files are accidentally written in an encoding which is not +// the system encoding. Typically, the system encoding will be +// UTF8 but there might be files stored in ISO8859-1 on disk. +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_BASE wxConvBrokenFileNames : public wxMBConv +{ +public: + wxConvBrokenFileNames(const wxChar *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 + { + return m_conv->MB2WC(out, in, outLen); + } + + virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const + { + return m_conv->WC2MB(out, in, outLen); + } + + virtual size_t GetMBNulLen() const + { + // cast needed to call a private function + return m_conv->GetMBNulLen(); + } + + virtual wxMBConv *Clone() const { return new wxConvBrokenFileNames(*this); } + +private: + // the conversion object we forward to + wxMBConv *m_conv; + + DECLARE_NO_ASSIGN_CLASS(wxConvBrokenFileNames) +}; + +#endif // __UNIX__ // ---------------------------------------------------------------------------- // wxMBConvUTF7 (for conversion using UTF7 encoding) @@ -72,11 +231,11 @@ WXDLLIMPEXP_DATA_BASE(extern wxMBConv) wxConvLibc; class WXDLLIMPEXP_BASE wxMBConvUTF7 : public wxMBConv { public: - virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const; - virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) 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; -WXDLLIMPEXP_DATA_BASE(extern wxMBConvUTF7) wxConvUTF7; + virtual wxMBConv *Clone() const { return new wxMBConvUTF7; } +}; // ---------------------------------------------------------------------------- // wxMBConvUTF8 (for conversion using UTF8 encoding) @@ -85,48 +244,217 @@ WXDLLIMPEXP_DATA_BASE(extern wxMBConvUTF7) wxConvUTF7; class WXDLLIMPEXP_BASE wxMBConvUTF8 : public wxMBConv { public: - virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const; - virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const; + 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 wxMBConv *Clone() const { return new wxMBConvUTF8(m_options); } + +private: + int m_options; +}; + +// ---------------------------------------------------------------------------- +// wxMBConvUTF16Base: for both LE and BE variants +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_BASE wxMBConvUTF16Base : public wxMBConv +{ +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); }; -WXDLLIMPEXP_DATA_BASE(extern wxMBConvUTF8) wxConvUTF8; +// ---------------------------------------------------------------------------- +// wxMBConvUTF16LE (for conversion using UTF16 Little Endian encoding) +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_BASE wxMBConvUTF16LE : public wxMBConvUTF16Base +{ +public: + 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; } +}; + +// ---------------------------------------------------------------------------- +// wxMBConvUTF16BE (for conversion using UTF16 Big Endian encoding) +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_BASE wxMBConvUTF16BE : public wxMBConvUTF16Base +{ +public: + 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; } +}; + +// ---------------------------------------------------------------------------- +// wxMBConvUTF32Base: base class for both LE and BE variants +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_BASE wxMBConvUTF32Base : public wxMBConv +{ +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); +}; + +// ---------------------------------------------------------------------------- +// wxMBConvUTF32LE (for conversion using UTF32 Little Endian encoding) +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_BASE wxMBConvUTF32LE : public wxMBConvUTF32Base +{ +public: + 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; } +}; + +// ---------------------------------------------------------------------------- +// wxMBConvUTF32BE (for conversion using UTF32 Big Endian encoding) +// ---------------------------------------------------------------------------- + +class WXDLLIMPEXP_BASE wxMBConvUTF32BE : public wxMBConvUTF32Base +{ +public: + 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; } +}; // ---------------------------------------------------------------------------- // wxCSConv (for conversion based on loadable char sets) // ---------------------------------------------------------------------------- -class WXDLLIMPEXP_BASE wxCharacterSet; +#include "wx/fontenc.h" 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(wxFontEncoding encoding); + wxCSConv(const wxCSConv& conv); virtual ~wxCSConv(); wxCSConv& operator=(const wxCSConv& conv); - void LoadNow(); + 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; + virtual wxMBConv *Clone() const { return new wxCSConv(*this); } - virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const; - virtual size_t WC2MB(char *buf, const wchar_t *psz, size_t n) const; - - void Clear() ; + void Clear(); private: + // common part of all ctors + void Init(); + + // creates m_convReal if necessary + void CreateConvIfNeeded() const; + + // do create m_convReal (unconditionally) + wxMBConv *DoCreate() const; + + // set the name (may be only called when m_name == NULL), makes copy of + // charset string void SetName(const wxChar *charset); + // note that we can't use wxString here because of compilation // dependencies: we're included from wx/string.h wxChar *m_name; - wxCharacterSet *m_cset; + wxFontEncoding m_encoding; + + // use CreateConvIfNeeded() before accessing m_convReal! + wxMBConv *m_convReal; bool m_deferred; }; -#define wxConvFile wxConvLocal -WXDLLIMPEXP_DATA_BASE(extern wxCSConv) wxConvLocal; -WXDLLIMPEXP_DATA_BASE(extern wxCSConv) wxConvISO8859_1; -WXDLLIMPEXP_DATA_BASE(extern wxMBConv *) wxConvCurrent; + +// ---------------------------------------------------------------------------- +// declare predefined conversion objects +// ---------------------------------------------------------------------------- + +// conversion to be used with all standard functions affected by locale, e.g. +// strtol(), strftime(), ... +extern WXDLLIMPEXP_DATA_BASE(wxMBConv&) 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; + +// conversion used for the file names on the systems where they're not Unicode +// (basically anything except Windows) +// +// this is used by all file functions, can be changed by the application +// +// by default UTF-8 under Mac OS X and wxConvLibc elsewhere (but it's not used +// under Windows normally) +extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvFileName; + +// backwards compatible define +#define wxConvFile (*wxConvFileName) + +// the current conversion object, may be set to any conversion, is used by +// default in a couple of places inside wx (initially same as wxConvLibc) +extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent; + +// the conversion corresponding to the current locale +extern WXDLLIMPEXP_DATA_BASE(wxCSConv&) 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; + +// ---------------------------------------------------------------------------- +// endianness-dependent conversions +// ---------------------------------------------------------------------------- + +#ifdef WORDS_BIGENDIAN + typedef wxMBConvUTF16BE wxMBConvUTF16; + typedef wxMBConvUTF32BE wxMBConvUTF32; +#else + typedef wxMBConvUTF16LE wxMBConvUTF16; + typedef wxMBConvUTF32LE wxMBConvUTF32; +#endif // ---------------------------------------------------------------------------- // filename conversion macros @@ -140,15 +468,18 @@ WXDLLIMPEXP_DATA_BASE(extern wxMBConv *) wxConvCurrent; #endif #if wxMBFILES && wxUSE_UNICODE - #define wxFNCONV(name) wxConvFile.cWX2MB(name) + #define wxFNCONV(name) wxConvFileName->cWX2MB(name) #define wxFNSTRINGCAST wxMBSTRINGCAST +#else +#if defined( __WXOSX__ ) && wxMBFILES + #define wxFNCONV(name) wxConvFileName->cWC2MB( wxConvLocal.cWX2WC(name) ) #else #define wxFNCONV(name) name +#endif #define wxFNSTRINGCAST WXSTRINGCAST #endif -#else - // !wxUSE_WCHAR_T +#else // !wxUSE_WCHAR_T // ---------------------------------------------------------------------------- // stand-ins in absence of wchar_t @@ -161,8 +492,13 @@ public: const char* cWX2MB(const char *psz) const { return psz; } }; -WXDLLIMPEXP_DATA_BASE(extern wxMBConv) wxConvLibc, wxConvFile, wxConvLocal, wxConvISO8859_1, wxConvUTF8; -WXDLLIMPEXP_DATA_BASE(extern wxMBConv *) wxConvCurrent; +#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 @@ -183,6 +519,5 @@ WXDLLIMPEXP_DATA_BASE(extern wxMBConv *) wxConvCurrent; #define wxConvertMB2WX(s) (s) #endif // Unicode/ANSI -#endif - // _WX_WXSTRCONVH__ +#endif // _WX_STRCONV_H_