///////////////////////////////////////////////////////////////////////////////
// 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__
+#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__
#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)
// ----------------------------------------------------------------------------
+// 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 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;
- // MB <-> WC
+ 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;
- // 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
const wxWCharBuffer cWX2WC(const char *psz) const { return cMB2WC(psz); }
#endif // Unicode/ANSI
- // virtual dtor for any base class
- virtual ~wxMBConv();
-
-private:
// this function is used in the implementation of cMB2WC() to distinguish
// between the following cases:
//
// 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 GetMinMBCharWidth() const { return 1; }
+ 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
+
+ // 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();
};
// ----------------------------------------------------------------------------
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__
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
return m_conv->WC2MB(out, in, outLen);
}
-private:
- virtual size_t GetMinMBCharWidth() const
+ virtual size_t GetMBNulLen() const
{
// cast needed to call a private function
- return ((wxConvBrokenFileNames *)m_conv)->GetMinMBCharWidth();
+ 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)
};
#endif // __UNIX__
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 wxMBConvUTF7; }
};
// ----------------------------------------------------------------------------
// 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;
class WXDLLIMPEXP_BASE wxMBConvUTF16Base : public wxMBConv
{
-private:
- virtual size_t GetMinMBCharWidth() const { return 2; }
+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);
};
// ----------------------------------------------------------------------------
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; }
};
// ----------------------------------------------------------------------------
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; }
};
// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxMBConvUTF32Base : public wxMBConv
{
-private:
- virtual size_t GetMinMBCharWidth() const { return 4; }
+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);
};
// ----------------------------------------------------------------------------
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; }
};
// ----------------------------------------------------------------------------
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; }
};
// ----------------------------------------------------------------------------
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 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 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
+ virtual bool IsUTF8() const;
+#endif
- void Clear() ;
+ virtual wxMBConv *Clone() const { return new wxCSConv(*this); }
+
+ void Clear();
+
+ // return true if the conversion could be initilized successfully
+ bool IsOk() const;
private:
// common part of all ctors
// set the name (may be only called when m_name == NULL), makes copy of
// charset string
- void SetName(const wxChar *charset);
-
- virtual size_t GetMinMBCharWidth() const;
+ void SetName(const char *charset);
// note that we can't use wxString here because of compilation
// dependencies: we're included from wx/string.h
- wxChar *m_name;
+ char *m_name;
wxFontEncoding m_encoding;
// use CreateConvIfNeeded() before accessing m_convReal!
// 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
#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_
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