mirror of https://github.com/PCSX2/pcsx2.git
554 lines
21 KiB
C++
554 lines
21 KiB
C++
///////////////////////////////////////////////////////////////////////////////
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// Name: strconv.h
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// Purpose: conversion routines for char sets any Unicode
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// Author: Ove Kaaven, Robert Roebling, Vadim Zeitlin
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// Modified by:
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// Created: 29/01/98
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// RCS-ID: $Id: strconv.h 45893 2007-05-08 20:05:16Z VZ $
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// Copyright: (c) 1998 Ove Kaaven, Robert Roebling
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// (c) 1998-2006 Vadim Zeitlin
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// Licence: wxWindows licence
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///////////////////////////////////////////////////////////////////////////////
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#ifndef _WX_STRCONV_H_
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#define _WX_STRCONV_H_
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#include "wx/defs.h"
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#include "wx/wxchar.h"
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#include "wx/buffer.h"
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#ifdef __DIGITALMARS__
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#include "typeinfo.h"
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#endif
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#if defined(__VISAGECPP__) && __IBMCPP__ >= 400
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# undef __BSEXCPT__
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#endif
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#include <stdlib.h>
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#if wxUSE_WCHAR_T
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// the error value returned by wxMBConv methods
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#define wxCONV_FAILED ((size_t)-1)
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// the default value for some length parameters meaning that the string is
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// NUL-terminated
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#define wxNO_LEN ((size_t)-1)
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// ----------------------------------------------------------------------------
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// wxMBConv (abstract base class for conversions)
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// ----------------------------------------------------------------------------
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// When deriving a new class from wxMBConv you must reimplement ToWChar() and
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// FromWChar() methods which are not pure virtual only for historical reasons,
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// don't let the fact that the existing classes implement MB2WC/WC2MB() instead
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// confuse you.
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//
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// You also have to implement Clone() to allow copying the conversions
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// polymorphically.
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//
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// And you might need to override GetMBNulLen() as well.
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class WXDLLIMPEXP_BASE wxMBConv
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{
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public:
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// The functions doing actual conversion from/to narrow to/from wide
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// character strings.
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//
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// On success, the return value is the length (i.e. the number of
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// characters, not bytes) of the converted string including any trailing
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// L'\0' or (possibly multiple) '\0'(s). If the conversion fails or if
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// there is not enough space for everything, including the trailing NUL
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// character(s), in the output buffer, wxCONV_FAILED is returned.
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//
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// In the special case when dstLen is 0 (outputBuf may be NULL then) the
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// return value is the length of the needed buffer but nothing happens
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// otherwise. If srcLen is wxNO_LEN, the entire string, up to and
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// including the trailing NUL(s), is converted, otherwise exactly srcLen
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// bytes are.
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//
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// Typical usage:
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//
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// size_t dstLen = conv.ToWChar(NULL, 0, src);
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// if ( dstLen != wxCONV_FAILED )
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// ... handle error ...
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// wchar_t *wbuf = new wchar_t[dstLen];
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// conv.ToWChar(wbuf, dstLen, src);
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//
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virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
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const char *src, size_t srcLen = wxNO_LEN) const;
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virtual size_t FromWChar(char *dst, size_t dstLen,
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const wchar_t *src, size_t srcLen = wxNO_LEN) const;
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// Convenience functions for translating NUL-terminated strings: returns
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// the buffer containing the converted string or NULL pointer if the
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// conversion failed.
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const wxWCharBuffer cMB2WC(const char *in) const;
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const wxCharBuffer cWC2MB(const wchar_t *in) const;
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// Convenience functions for converting strings which may contain embedded
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// NULs and don't have to be NUL-terminated.
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//
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// inLen is the length of the buffer including trailing NUL if any: if the
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// last 4 bytes of the buffer are all NULs, these functions are more
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// efficient as they avoid copying the string, but otherwise a copy is made
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// internally which could be quite bad for (very) long strings.
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//
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// outLen receives, if not NULL, the length of the converted string or 0 if
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// the conversion failed (returning 0 and not -1 in this case makes it
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// difficult to distinguish between failed conversion and empty input but
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// this is done for backwards compatibility)
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const wxWCharBuffer
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cMB2WC(const char *in, size_t inLen, size_t *outLen) const;
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const wxCharBuffer
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cWC2MB(const wchar_t *in, size_t inLen, size_t *outLen) const;
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// convenience functions for converting MB or WC to/from wxWin default
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#if wxUSE_UNICODE
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const wxWCharBuffer cMB2WX(const char *psz) const { return cMB2WC(psz); }
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const wxCharBuffer cWX2MB(const wchar_t *psz) const { return cWC2MB(psz); }
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const wchar_t* cWC2WX(const wchar_t *psz) const { return psz; }
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const wchar_t* cWX2WC(const wchar_t *psz) const { return psz; }
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#else // ANSI
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const char* cMB2WX(const char *psz) const { return psz; }
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const char* cWX2MB(const char *psz) const { return psz; }
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const wxCharBuffer cWC2WX(const wchar_t *psz) const { return cWC2MB(psz); }
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const wxWCharBuffer cWX2WC(const char *psz) const { return cMB2WC(psz); }
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#endif // Unicode/ANSI
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// this function is used in the implementation of cMB2WC() to distinguish
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// between the following cases:
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//
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// a) var width encoding with strings terminated by a single NUL
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// (usual multibyte encodings): return 1 in this case
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// b) fixed width encoding with 2 bytes/char and so terminated by
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// 2 NULs (UTF-16/UCS-2 and variants): return 2 in this case
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// c) fixed width encoding with 4 bytes/char and so terminated by
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// 4 NULs (UTF-32/UCS-4 and variants): return 4 in this case
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//
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// anything else is not supported currently and -1 should be returned
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virtual size_t GetMBNulLen() const { return 1; }
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// return the maximal value currently returned by GetMBNulLen() for any
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// encoding
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static size_t GetMaxMBNulLen() { return 4 /* for UTF-32 */; }
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// The old conversion functions. The existing classes currently mostly
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// implement these ones but we're in transition to using To/FromWChar()
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// instead and any new classes should implement just the new functions.
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// For now, however, we provide default implementation of To/FromWChar() in
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// this base class in terms of MB2WC/WC2MB() to avoid having to rewrite all
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// the conversions at once.
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//
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// On success, the return value is the length (i.e. the number of
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// characters, not bytes) not counting the trailing NUL(s) of the converted
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// string. On failure, (size_t)-1 is returned. In the special case when
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// outputBuf is NULL the return value is the same one but nothing is
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// written to the buffer.
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//
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// Note that outLen is the length of the output buffer, not the length of
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// the input (which is always supposed to be terminated by one or more
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// NULs, as appropriate for the encoding)!
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virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const;
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virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const;
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// make a heap-allocated copy of this object
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virtual wxMBConv *Clone() const = 0;
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// virtual dtor for any base class
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virtual ~wxMBConv();
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};
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// ----------------------------------------------------------------------------
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// wxMBConvLibc uses standard mbstowcs() and wcstombs() functions for
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// conversion (hence it depends on the current locale)
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxMBConvLibc : public wxMBConv
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{
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public:
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virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
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virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
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virtual wxMBConv *Clone() const { return new wxMBConvLibc; }
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};
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#ifdef __UNIX__
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// ----------------------------------------------------------------------------
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// wxConvBrokenFileNames is made for Unix in Unicode mode when
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// files are accidentally written in an encoding which is not
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// the system encoding. Typically, the system encoding will be
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// UTF8 but there might be files stored in ISO8859-1 on disk.
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxConvBrokenFileNames : public wxMBConv
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{
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public:
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wxConvBrokenFileNames(const wxChar *charset);
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wxConvBrokenFileNames(const wxConvBrokenFileNames& conv)
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: wxMBConv(),
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m_conv(conv.m_conv ? conv.m_conv->Clone() : NULL)
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{
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}
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virtual ~wxConvBrokenFileNames() { delete m_conv; }
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virtual size_t MB2WC(wchar_t *out, const char *in, size_t outLen) const
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{
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return m_conv->MB2WC(out, in, outLen);
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}
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virtual size_t WC2MB(char *out, const wchar_t *in, size_t outLen) const
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{
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return m_conv->WC2MB(out, in, outLen);
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}
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virtual size_t GetMBNulLen() const
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{
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// cast needed to call a private function
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return m_conv->GetMBNulLen();
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}
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virtual wxMBConv *Clone() const { return new wxConvBrokenFileNames(*this); }
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private:
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// the conversion object we forward to
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wxMBConv *m_conv;
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DECLARE_NO_ASSIGN_CLASS(wxConvBrokenFileNames)
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};
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#endif // __UNIX__
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// ----------------------------------------------------------------------------
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// wxMBConvUTF7 (for conversion using UTF7 encoding)
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxMBConvUTF7 : public wxMBConv
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{
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public:
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virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
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virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
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virtual wxMBConv *Clone() const { return new wxMBConvUTF7; }
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};
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// ----------------------------------------------------------------------------
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// wxMBConvUTF8 (for conversion using UTF8 encoding)
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxMBConvUTF8 : public wxMBConv
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{
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public:
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enum
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{
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MAP_INVALID_UTF8_NOT = 0,
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MAP_INVALID_UTF8_TO_PUA = 1,
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MAP_INVALID_UTF8_TO_OCTAL = 2
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};
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wxMBConvUTF8(int options = MAP_INVALID_UTF8_NOT) : m_options(options) { }
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virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
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virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
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virtual wxMBConv *Clone() const { return new wxMBConvUTF8(m_options); }
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private:
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int m_options;
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};
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// ----------------------------------------------------------------------------
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// wxMBConvUTF16Base: for both LE and BE variants
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxMBConvUTF16Base : public wxMBConv
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{
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public:
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enum { BYTES_PER_CHAR = 2 };
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virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; }
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protected:
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// return the length of the buffer using srcLen if it's not wxNO_LEN and
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// computing the length ourselves if it is; also checks that the length is
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// even if specified as we need an entire number of UTF-16 characters and
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// returns wxNO_LEN which indicates error if it is odd
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static size_t GetLength(const char *src, size_t srcLen);
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};
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// ----------------------------------------------------------------------------
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// wxMBConvUTF16LE (for conversion using UTF16 Little Endian encoding)
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxMBConvUTF16LE : public wxMBConvUTF16Base
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{
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public:
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virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
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const char *src, size_t srcLen = wxNO_LEN) const;
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virtual size_t FromWChar(char *dst, size_t dstLen,
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const wchar_t *src, size_t srcLen = wxNO_LEN) const;
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virtual wxMBConv *Clone() const { return new wxMBConvUTF16LE; }
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};
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// ----------------------------------------------------------------------------
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// wxMBConvUTF16BE (for conversion using UTF16 Big Endian encoding)
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxMBConvUTF16BE : public wxMBConvUTF16Base
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{
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public:
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virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
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const char *src, size_t srcLen = wxNO_LEN) const;
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virtual size_t FromWChar(char *dst, size_t dstLen,
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const wchar_t *src, size_t srcLen = wxNO_LEN) const;
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virtual wxMBConv *Clone() const { return new wxMBConvUTF16BE; }
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};
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// ----------------------------------------------------------------------------
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// wxMBConvUTF32Base: base class for both LE and BE variants
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxMBConvUTF32Base : public wxMBConv
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{
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public:
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enum { BYTES_PER_CHAR = 4 };
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virtual size_t GetMBNulLen() const { return BYTES_PER_CHAR; }
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protected:
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// this is similar to wxMBConvUTF16Base method with the same name except
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// that, of course, it verifies that length is divisible by 4 if given and
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// not by 2
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static size_t GetLength(const char *src, size_t srcLen);
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};
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// ----------------------------------------------------------------------------
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// wxMBConvUTF32LE (for conversion using UTF32 Little Endian encoding)
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxMBConvUTF32LE : public wxMBConvUTF32Base
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{
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public:
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virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
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const char *src, size_t srcLen = wxNO_LEN) const;
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virtual size_t FromWChar(char *dst, size_t dstLen,
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const wchar_t *src, size_t srcLen = wxNO_LEN) const;
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virtual wxMBConv *Clone() const { return new wxMBConvUTF32LE; }
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};
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// ----------------------------------------------------------------------------
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// wxMBConvUTF32BE (for conversion using UTF32 Big Endian encoding)
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// ----------------------------------------------------------------------------
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class WXDLLIMPEXP_BASE wxMBConvUTF32BE : public wxMBConvUTF32Base
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{
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public:
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virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
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const char *src, size_t srcLen = wxNO_LEN) const;
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virtual size_t FromWChar(char *dst, size_t dstLen,
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const wchar_t *src, size_t srcLen = wxNO_LEN) const;
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virtual wxMBConv *Clone() const { return new wxMBConvUTF32BE; }
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};
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// ----------------------------------------------------------------------------
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// wxCSConv (for conversion based on loadable char sets)
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// ----------------------------------------------------------------------------
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#include "wx/fontenc.h"
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class WXDLLIMPEXP_BASE wxCSConv : public wxMBConv
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{
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public:
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// we can be created either from charset name or from an encoding constant
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// but we can't have both at once
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wxCSConv(const wxChar *charset);
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wxCSConv(wxFontEncoding encoding);
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wxCSConv(const wxCSConv& conv);
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virtual ~wxCSConv();
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wxCSConv& operator=(const wxCSConv& conv);
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virtual size_t ToWChar(wchar_t *dst, size_t dstLen,
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const char *src, size_t srcLen = wxNO_LEN) const;
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virtual size_t FromWChar(char *dst, size_t dstLen,
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const wchar_t *src, size_t srcLen = wxNO_LEN) const;
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virtual size_t MB2WC(wchar_t *outputBuf, const char *psz, size_t outputSize) const;
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virtual size_t WC2MB(char *outputBuf, const wchar_t *psz, size_t outputSize) const;
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virtual size_t GetMBNulLen() const;
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virtual wxMBConv *Clone() const { return new wxCSConv(*this); }
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void Clear();
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#if wxABI_VERSION >= 20802
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// return true if the conversion could be initilized successfully
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bool IsOk() const;
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#endif // wx 2.8.2+
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private:
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// common part of all ctors
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void Init();
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// creates m_convReal if necessary
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void CreateConvIfNeeded() const;
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// do create m_convReal (unconditionally)
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wxMBConv *DoCreate() const;
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// set the name (may be only called when m_name == NULL), makes copy of
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// charset string
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void SetName(const wxChar *charset);
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// note that we can't use wxString here because of compilation
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// dependencies: we're included from wx/string.h
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wxChar *m_name;
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wxFontEncoding m_encoding;
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// use CreateConvIfNeeded() before accessing m_convReal!
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wxMBConv *m_convReal;
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bool m_deferred;
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};
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// ----------------------------------------------------------------------------
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// declare predefined conversion objects
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// ----------------------------------------------------------------------------
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// conversion to be used with all standard functions affected by locale, e.g.
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// strtol(), strftime(), ...
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extern WXDLLIMPEXP_DATA_BASE(wxMBConv&) wxConvLibc;
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// conversion ISO-8859-1/UTF-7/UTF-8 <-> wchar_t
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extern WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvISO8859_1;
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extern WXDLLIMPEXP_DATA_BASE(wxMBConvUTF7&) wxConvUTF7;
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extern WXDLLIMPEXP_DATA_BASE(wxMBConvUTF8&) wxConvUTF8;
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// conversion used for the file names on the systems where they're not Unicode
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// (basically anything except Windows)
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//
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// this is used by all file functions, can be changed by the application
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//
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// by default UTF-8 under Mac OS X and wxConvLibc elsewhere (but it's not used
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// under Windows normally)
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extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvFileName;
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// backwards compatible define
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#define wxConvFile (*wxConvFileName)
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// the current conversion object, may be set to any conversion, is used by
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// default in a couple of places inside wx (initially same as wxConvLibc)
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extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent;
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// the conversion corresponding to the current locale
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extern WXDLLIMPEXP_DATA_BASE(wxCSConv&) wxConvLocal;
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// the conversion corresponding to the encoding of the standard UI elements
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//
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// by default this is the same as wxConvLocal but may be changed if the program
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// needs to use a fixed encoding
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extern WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvUI;
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// ----------------------------------------------------------------------------
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// endianness-dependent conversions
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// ----------------------------------------------------------------------------
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#ifdef WORDS_BIGENDIAN
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typedef wxMBConvUTF16BE wxMBConvUTF16;
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typedef wxMBConvUTF32BE wxMBConvUTF32;
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#else
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typedef wxMBConvUTF16LE wxMBConvUTF16;
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typedef wxMBConvUTF32LE wxMBConvUTF32;
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#endif
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// ----------------------------------------------------------------------------
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// filename conversion macros
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// ----------------------------------------------------------------------------
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// filenames are multibyte on Unix and widechar on Windows
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#if defined(__UNIX__) || defined(__WXMAC__)
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#define wxMBFILES 1
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#else
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#define wxMBFILES 0
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#endif
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#if wxMBFILES && wxUSE_UNICODE
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#define wxFNCONV(name) wxConvFileName->cWX2MB(name)
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#define wxFNSTRINGCAST wxMBSTRINGCAST
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#else
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#if defined( __WXOSX__ ) && wxMBFILES
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#define wxFNCONV(name) wxConvFileName->cWC2MB( wxConvLocal.cWX2WC(name) )
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#else
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#define wxFNCONV(name) name
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|
#endif
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#define wxFNSTRINGCAST WXSTRINGCAST
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#endif
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|
|
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#else // !wxUSE_WCHAR_T
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|
|
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// ----------------------------------------------------------------------------
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// stand-ins in absence of wchar_t
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// ----------------------------------------------------------------------------
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|
|
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class WXDLLIMPEXP_BASE wxMBConv
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|
{
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public:
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const char* cMB2WX(const char *psz) const { return psz; }
|
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const char* cWX2MB(const char *psz) const { return psz; }
|
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wxMBConv *Clone() const { return NULL; }
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|
};
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|
|
|
#define wxConvFile wxConvLocal
|
|
#define wxConvUI wxConvCurrent
|
|
|
|
typedef wxMBConv wxCSConv;
|
|
|
|
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/!wxUSE_WCHAR_T
|
|
|
|
// ----------------------------------------------------------------------------
|
|
// macros for the most common conversions
|
|
// ----------------------------------------------------------------------------
|
|
|
|
#if wxUSE_UNICODE
|
|
#define wxConvertWX2MB(s) wxConvCurrent->cWX2MB(s)
|
|
#define wxConvertMB2WX(s) wxConvCurrent->cMB2WX(s)
|
|
|
|
#if wxABI_VERSION >= 20802
|
|
// 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);
|
|
#endif // wxABI 2.8.2+
|
|
#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_
|
|
|