///////////////////////////////////////////////////////////////////////////////
-// Name: strconv.h
+// Name: wx/strconv.h
// Purpose: conversion routines for char sets any Unicode
// Author: Ove Kaaven, Robert Roebling, Vadim Zeitlin
// Modified by:
// Created: 29/01/98
-// RCS-ID: $Id$
// Copyright: (c) 1998 Ove Kaaven, Robert Roebling
// (c) 1998-2006 Vadim Zeitlin
// Licence: wxWindows licence
#define _WX_STRCONV_H_
#include "wx/defs.h"
-#include "wx/wxchar.h"
+#include "wx/chartype.h"
#include "wx/buffer.h"
#ifdef __DIGITALMARS__
#include <stdlib.h>
-#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)
// ----------------------------------------------------------------------------
// 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;
// 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); }
// 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
// The old conversion functions. The existing classes currently mostly
// implement these ones but we're in transition to using To/FromWChar()
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__
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)
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;
- DECLARE_NO_ASSIGN_CLASS(wxConvBrokenFileNames)
+ wxDECLARE_NO_ASSIGN_CLASS(wxConvBrokenFileNames);
};
#endif // __UNIX__
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:
enum
};
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;
};
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);
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();
+ // 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;
};
// 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)
// 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
// 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
#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
// ----------------------------------------------------------------------------
#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_STRCONV_H_
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