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wxWidgets/src/common/strconv.cpp

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/////////////////////////////////////////////////////////////////////////////
// Name: src/common/strconv.cpp
// Purpose: Unicode conversion classes
// Author: Ove Kaaven, Robert Roebling, Vadim Zeitlin, Vaclav Slavik,
// Ryan Norton, Fredrik Roubert (UTF7)
// Modified by:
// Created: 29/01/98
// RCS-ID: $Id$
// Copyright: (c) 1999 Ove Kaaven, Robert Roebling, Vaclav Slavik
// (c) 2000-2003 Vadim Zeitlin
// (c) 2004 Ryan Norton, Fredrik Roubert
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
// For compilers that support precompilation, includes "wx.h".
#include "wx/wxprec.h"
#ifdef __BORLANDC__
#pragma hdrstop
#endif //__BORLANDC__
#ifndef WX_PRECOMP
#include "wx/intl.h"
#include "wx/log.h"
#include "wx/utils.h"
#include "wx/hashmap.h"
#endif
#include "wx/strconv.h"
#if wxUSE_WCHAR_T
#ifndef __WXWINCE__
#include <errno.h>
#endif
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#if defined(__WIN32__) && !defined(__WXMICROWIN__)
#include "wx/msw/private.h"
#include "wx/msw/missing.h"
#define wxHAVE_WIN32_MB2WC
#endif
#ifdef HAVE_ICONV
#include <iconv.h>
#include "wx/thread.h"
#endif
#include "wx/encconv.h"
#include "wx/fontmap.h"
#ifdef __DARWIN__
#include "wx/mac/corefoundation/private/strconv_cf.h"
#endif //def __DARWIN__
#define TRACE_STRCONV _T("strconv")
// WC_UTF16 is defined only if sizeof(wchar_t) == 2, otherwise it's supposed to
// be 4 bytes
#if SIZEOF_WCHAR_T == 2
#define WC_UTF16
#endif
// ============================================================================
// implementation
// ============================================================================
// helper function of cMB2WC(): check if n bytes at this location are all NUL
static bool NotAllNULs(const char *p, size_t n)
{
while ( n && *p++ == '\0' )
n--;
return n != 0;
}
// ----------------------------------------------------------------------------
// UTF-16 en/decoding to/from UCS-4 with surrogates handling
// ----------------------------------------------------------------------------
static size_t encode_utf16(wxUint32 input, wxUint16 *output)
{
if (input <= 0xffff)
{
if (output)
*output = (wxUint16) input;
return 1;
}
else if (input >= 0x110000)
{
return wxCONV_FAILED;
}
else
{
if (output)
{
*output++ = (wxUint16) ((input >> 10) + 0xd7c0);
*output = (wxUint16) ((input & 0x3ff) + 0xdc00);
}
return 2;
}
}
static size_t decode_utf16(const wxUint16* input, wxUint32& output)
{
if ((*input < 0xd800) || (*input > 0xdfff))
{
output = *input;
return 1;
}
else if ((input[1] < 0xdc00) || (input[1] > 0xdfff))
{
output = *input;
return wxCONV_FAILED;
}
else
{
output = ((input[0] - 0xd7c0) << 10) + (input[1] - 0xdc00);
return 2;
}
}
#ifdef WC_UTF16
typedef wchar_t wxDecodeSurrogate_t;
#else // !WC_UTF16
typedef wxUint16 wxDecodeSurrogate_t;
#endif // WC_UTF16/!WC_UTF16
// returns the next UTF-32 character from the wchar_t buffer and advances the
// pointer to the character after this one
//
// if an invalid character is found, *pSrc is set to NULL, the caller must
// check for this
static wxUint32 wxDecodeSurrogate(const wxDecodeSurrogate_t **pSrc)
{
wxUint32 out;
const size_t
n = decode_utf16(wx_reinterpret_cast(const wxUint16 *, *pSrc), out);
if ( n == wxCONV_FAILED )
*pSrc = NULL;
else
*pSrc += n;
return out;
}
// ----------------------------------------------------------------------------
// wxMBConv
// ----------------------------------------------------------------------------
size_t
wxMBConv::ToWChar(wchar_t *dst, size_t dstLen,
const char *src, size_t srcLen) const
{
// although new conversion classes are supposed to implement this function
// directly, the existins ones only implement the old MB2WC() and so, to
// avoid to have to rewrite all conversion classes at once, we provide a
// default (but not efficient) implementation of this one in terms of the
// old function by copying the input to ensure that it's NUL-terminated and
// then using MB2WC() to convert it
// the number of chars [which would be] written to dst [if it were not NULL]
size_t dstWritten = 0;
// the number of NULs terminating this string
size_t nulLen = 0; // not really needed, but just to avoid warnings
// if we were not given the input size we just have to assume that the
// string is properly terminated as we have no way of knowing how long it
// is anyhow, but if we do have the size check whether there are enough
// NULs at the end
wxCharBuffer bufTmp;
const char *srcEnd;
if ( srcLen != wxNO_LEN )
{
// we need to know how to find the end of this string
nulLen = GetMBNulLen();
if ( nulLen == wxCONV_FAILED )
return wxCONV_FAILED;
// if there are enough NULs we can avoid the copy
if ( srcLen < nulLen || NotAllNULs(src + srcLen - nulLen, nulLen) )
{
// make a copy in order to properly NUL-terminate the string
bufTmp = wxCharBuffer(srcLen + nulLen - 1 /* 1 will be added */);
char * const p = bufTmp.data();
memcpy(p, src, srcLen);
for ( char *s = p + srcLen; s < p + srcLen + nulLen; s++ )
*s = '\0';
src = bufTmp;
}
srcEnd = src + srcLen;
}
else // quit after the first loop iteration
{
srcEnd = NULL;
}
for ( ;; )
{
// try to convert the current chunk
size_t lenChunk = MB2WC(NULL, src, 0);
if ( lenChunk == wxCONV_FAILED )
return wxCONV_FAILED;
lenChunk++; // for the L'\0' at the end of this chunk
dstWritten += lenChunk;
if ( lenChunk == 1 )
{
// nothing left in the input string, conversion succeeded
break;
}
if ( dst )
{
if ( dstWritten > dstLen )
return wxCONV_FAILED;
if ( MB2WC(dst, src, lenChunk) == wxCONV_FAILED )
return wxCONV_FAILED;
dst += lenChunk;
}
if ( !srcEnd )
{
// we convert just one chunk in this case as this is the entire
// string anyhow
break;
}
// advance the input pointer past the end of this chunk
while ( NotAllNULs(src, nulLen) )
{
// notice that we must skip over multiple bytes here as we suppose
// that if NUL takes 2 or 4 bytes, then all the other characters do
// too and so if advanced by a single byte we might erroneously
// detect sequences of NUL bytes in the middle of the input
src += nulLen;
}
src += nulLen; // skipping over its terminator as well
// note that ">=" (and not just "==") is needed here as the terminator
// we skipped just above could be inside or just after the buffer
// delimited by inEnd
if ( src >= srcEnd )
break;
}
return dstWritten;
}
size_t
wxMBConv::FromWChar(char *dst, size_t dstLen,
const wchar_t *src, size_t srcLen) const
{
// the number of chars [which would be] written to dst [if it were not NULL]
size_t dstWritten = 0;
// make a copy of the input string unless it is already properly
// NUL-terminated
//
// if we don't know its length we have no choice but to assume that it is,
// indeed, properly terminated
wxWCharBuffer bufTmp;
if ( srcLen == wxNO_LEN )
{
srcLen = wxWcslen(src) + 1;
}
else if ( srcLen != 0 && src[srcLen - 1] != L'\0' )
{
// make a copy in order to properly NUL-terminate the string
bufTmp = wxWCharBuffer(srcLen);
memcpy(bufTmp.data(), src, srcLen * sizeof(wchar_t));
src = bufTmp;
}
const size_t lenNul = GetMBNulLen();
for ( const wchar_t * const srcEnd = src + srcLen;
src < srcEnd;
src += wxWcslen(src) + 1 /* skip L'\0' too */ )
{
// try to convert the current chunk
size_t lenChunk = WC2MB(NULL, src, 0);
if ( lenChunk == wxCONV_FAILED )
return wxCONV_FAILED;
lenChunk += lenNul;
dstWritten += lenChunk;
if ( dst )
{
if ( dstWritten > dstLen )
return wxCONV_FAILED;
if ( WC2MB(dst, src, lenChunk) == wxCONV_FAILED )
return wxCONV_FAILED;
dst += lenChunk;
}
}
return dstWritten;
}
size_t wxMBConv::MB2WC(wchar_t *outBuff, const char *inBuff, size_t outLen) const
{
size_t rc = ToWChar(outBuff, outLen, inBuff);
if ( rc != wxCONV_FAILED )
{
// ToWChar() returns the buffer length, i.e. including the trailing
// NUL, while this method doesn't take it into account
rc--;
}
return rc;
}
size_t wxMBConv::WC2MB(char *outBuff, const wchar_t *inBuff, size_t outLen) const
{
size_t rc = FromWChar(outBuff, outLen, inBuff);
if ( rc != wxCONV_FAILED )
{
rc -= GetMBNulLen();
}
return rc;
}
wxMBConv::~wxMBConv()
{
// nothing to do here (necessary for Darwin linking probably)
}
const wxWCharBuffer wxMBConv::cMB2WC(const char *psz) const
{
if ( psz )
{
// calculate the length of the buffer needed first
const size_t nLen = ToWChar(NULL, 0, psz);
if ( nLen != wxCONV_FAILED )
{
// now do the actual conversion
wxWCharBuffer buf(nLen - 1 /* +1 added implicitly */);
// +1 for the trailing NULL
if ( ToWChar(buf.data(), nLen, psz) != wxCONV_FAILED )
return buf;
}
}
return wxWCharBuffer();
}
const wxCharBuffer wxMBConv::cWC2MB(const wchar_t *pwz) const
{
if ( pwz )
{
const size_t nLen = FromWChar(NULL, 0, pwz);
if ( nLen != wxCONV_FAILED )
{
wxCharBuffer buf(nLen - 1);
if ( FromWChar(buf.data(), nLen, pwz) != wxCONV_FAILED )
return buf;
}
}
return wxCharBuffer();
}
const wxWCharBuffer
wxMBConv::cMB2WC(const char *inBuff, size_t inLen, size_t *outLen) const
{
const size_t dstLen = ToWChar(NULL, 0, inBuff, inLen);
if ( dstLen != wxCONV_FAILED )
{
// notice that we allocate space for dstLen+1 wide characters here
// because we want the buffer to always be NUL-terminated, even if the
// input isn't (as otherwise the caller has no way to know its length)
wxWCharBuffer wbuf(dstLen);
wbuf.data()[dstLen - 1] = L'\0';
if ( ToWChar(wbuf.data(), dstLen, inBuff, inLen) != wxCONV_FAILED )
{
if ( outLen )
{
*outLen = dstLen;
if ( wbuf[dstLen - 1] == L'\0' )
(*outLen)--;
}
return wbuf;
}
}
if ( outLen )
*outLen = 0;
return wxWCharBuffer();
}
const wxCharBuffer
wxMBConv::cWC2MB(const wchar_t *inBuff, size_t inLen, size_t *outLen) const
{
size_t dstLen = FromWChar(NULL, 0, inBuff, inLen);
if ( dstLen != wxCONV_FAILED )
{
const size_t nulLen = GetMBNulLen();
// as above, ensure that the buffer is always NUL-terminated, even if
// the input is not
wxCharBuffer buf(dstLen + nulLen - 1);
memset(buf.data() + dstLen, 0, nulLen);
if ( FromWChar(buf.data(), dstLen, inBuff, inLen) != wxCONV_FAILED )
{
if ( outLen )
{
*outLen = dstLen;
if ( dstLen >= nulLen &&
!NotAllNULs(buf.data() + dstLen - nulLen, nulLen) )
{
// in this case the output is NUL-terminated and we're not
// supposed to count NUL
*outLen -= nulLen;
}
}
return buf;
}
}
if ( outLen )
*outLen = 0;
return wxCharBuffer();
}
// ----------------------------------------------------------------------------
// wxMBConvLibc
// ----------------------------------------------------------------------------
size_t wxMBConvLibc::MB2WC(wchar_t *buf, const char *psz, size_t n) const
{
return wxMB2WC(buf, psz, n);
}
size_t wxMBConvLibc::WC2MB(char *buf, const wchar_t *psz, size_t n) const
{
return wxWC2MB(buf, psz, n);
}
// ----------------------------------------------------------------------------
// wxConvBrokenFileNames
// ----------------------------------------------------------------------------
#ifdef __UNIX__
wxConvBrokenFileNames::wxConvBrokenFileNames(const wxString& charset)
{
if ( wxStricmp(charset, _T("UTF-8")) == 0 ||
wxStricmp(charset, _T("UTF8")) == 0 )
m_conv = new wxMBConvUTF8(wxMBConvUTF8::MAP_INVALID_UTF8_TO_PUA);
else
m_conv = new wxCSConv(charset);
}
#endif // __UNIX__
// ----------------------------------------------------------------------------
// UTF-7
// ----------------------------------------------------------------------------
// Implementation (C) 2004 Fredrik Roubert
//
// BASE64 decoding table
//
static const unsigned char utf7unb64[] =
{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0x3e, 0xff, 0xff, 0xff, 0x3f,
0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3b,
0x3c, 0x3d, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
0x07, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e,
0x0f, 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16,
0x17, 0x18, 0x19, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, 0x28,
0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
0x31, 0x32, 0x33, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};
size_t wxMBConvUTF7::MB2WC(wchar_t *buf, const char *psz, size_t n) const
{
size_t len = 0;
while ( *psz && (!buf || (len < n)) )
{
unsigned char cc = *psz++;
if (cc != '+')
{
// plain ASCII char
if (buf)
*buf++ = cc;
len++;
}
else if (*psz == '-')
{
// encoded plus sign
if (buf)
*buf++ = cc;
len++;
psz++;
}
else // start of BASE64 encoded string
{
bool lsb, ok;
unsigned int d, l;
for ( ok = lsb = false, d = 0, l = 0;
(cc = utf7unb64[(unsigned char)*psz]) != 0xff;
psz++ )
{
d <<= 6;
d += cc;
for (l += 6; l >= 8; lsb = !lsb)
{
unsigned char c = (unsigned char)((d >> (l -= 8)) % 256);
if (lsb)
{
if (buf)
*buf++ |= c;
len ++;
}
else
{
if (buf)
*buf = (wchar_t)(c << 8);
}
ok = true;
}
}
if ( !ok )
{
// in valid UTF7 we should have valid characters after '+'
return wxCONV_FAILED;
}
if (*psz == '-')
psz++;
}
}
if ( buf && (len < n) )
*buf = '\0';
return len;
}
//
// BASE64 encoding table
//
static const unsigned char utf7enb64[] =
{
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P',
'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
'Y', 'Z', 'a', 'b', 'c', 'd', 'e', 'f',
'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n',
'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3',
'4', '5', '6', '7', '8', '9', '+', '/'
};
//
// UTF-7 encoding table
//
// 0 - Set D (directly encoded characters)
// 1 - Set O (optional direct characters)
// 2 - whitespace characters (optional)
// 3 - special characters
//
static const unsigned char utf7encode[128] =
{
3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 3, 3, 2, 3, 3,
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3,
2, 1, 1, 1, 1, 1, 1, 0, 0, 0, 1, 3, 0, 0, 0, 3,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 0,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 3, 1, 1, 1,
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 3, 3
};
size_t wxMBConvUTF7::WC2MB(char *buf, const wchar_t *psz, size_t n) const
{
size_t len = 0;
while (*psz && ((!buf) || (len < n)))
{
wchar_t cc = *psz++;
if (cc < 0x80 && utf7encode[cc] < 1)
{
// plain ASCII char
if (buf)
*buf++ = (char)cc;
len++;
}
#ifndef WC_UTF16
else if (((wxUint32)cc) > 0xffff)
{
// no surrogate pair generation (yet?)
return wxCONV_FAILED;
}
#endif
else
{
if (buf)
*buf++ = '+';
len++;
if (cc != '+')
{
// BASE64 encode string
unsigned int lsb, d, l;
for (d = 0, l = 0; /*nothing*/; psz++)
{
for (lsb = 0; lsb < 2; lsb ++)
{
d <<= 8;
d += lsb ? cc & 0xff : (cc & 0xff00) >> 8;
for (l += 8; l >= 6; )
{
l -= 6;
if (buf)
*buf++ = utf7enb64[(d >> l) % 64];
len++;
}
}
cc = *psz;
if (!(cc) || (cc < 0x80 && utf7encode[cc] < 1))
break;
}
if (l != 0)
{
if (buf)
*buf++ = utf7enb64[((d % 16) << (6 - l)) % 64];
len++;
}
}
if (buf)
*buf++ = '-';
len++;
}
}
if (buf && (len < n))
*buf = 0;
return len;
}
// ----------------------------------------------------------------------------
// UTF-8
// ----------------------------------------------------------------------------
static const wxUint32 utf8_max[]=
{ 0x7f, 0x7ff, 0xffff, 0x1fffff, 0x3ffffff, 0x7fffffff, 0xffffffff };
// boundaries of the private use area we use to (temporarily) remap invalid
// characters invalid in a UTF-8 encoded string
const wxUint32 wxUnicodePUA = 0x100000;
const wxUint32 wxUnicodePUAEnd = wxUnicodePUA + 256;
// this table gives the length of the UTF-8 encoding from its first character:
const unsigned char tableUtf8Lengths[256] = {
// single-byte sequences (ASCII):
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 00..0F
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 10..1F
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 20..2F
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 30..3F
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 40..4F
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 50..5F
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 60..6F
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, // 70..7F
// these are invalid:
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 80..8F
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // 90..9F
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // A0..AF
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, // B0..BF
0, 0, // C0,C1
// two-byte sequences:
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // C2..CF
2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, // D0..DF
// three-byte sequences:
3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, // E0..EF
// four-byte sequences:
4, 4, 4, 4, 4, // F0..F4
// these are invalid again (5- or 6-byte
// sequences and sequences for code points
// above U+10FFFF, as restricted by RFC 3629):
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 // F5..FF
};
size_t
wxMBConvStrictUTF8::ToWChar(wchar_t *dst, size_t dstLen,
const char *src, size_t srcLen) const
{
wchar_t *out = dstLen ? dst : NULL;
size_t written = 0;
if ( srcLen == wxNO_LEN )
srcLen = strlen(src) + 1;
for ( const char *p = src; ; p++ )
{
if ( !(srcLen == wxNO_LEN ? *p : srcLen) )
{
// all done successfully, just add the trailing NULL if we are not
// using explicit length
if ( srcLen == wxNO_LEN )
{
if ( out )
{
if ( !dstLen )
break;
*out = L'\0';
}
written++;
}
return written;
}
if ( out && !dstLen-- )
break;
wxUint32 code;
unsigned char c = *p;
if ( c < 0x80 )
{
if ( srcLen == 0 ) // the test works for wxNO_LEN too
break;
if ( srcLen != wxNO_LEN )
srcLen--;
code = c;
}
else
{
unsigned len = tableUtf8Lengths[c];
if ( !len )
break;
if ( srcLen < len ) // the test works for wxNO_LEN too
break;
if ( srcLen != wxNO_LEN )
srcLen -= len;
// Char. number range | UTF-8 octet sequence
// (hexadecimal) | (binary)
// ----------------------+----------------------------------------
// 0000 0000 - 0000 007F | 0xxxxxxx
// 0000 0080 - 0000 07FF | 110xxxxx 10xxxxxx
// 0000 0800 - 0000 FFFF | 1110xxxx 10xxxxxx 10xxxxxx
// 0001 0000 - 0010 FFFF | 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
//
// Code point value is stored in bits marked with 'x',
// lowest-order bit of the value on the right side in the diagram
// above. (from RFC 3629)
// mask to extract lead byte's value ('x' bits above), by sequence
// length:
static const unsigned char leadValueMask[] = { 0x7F, 0x1F, 0x0F, 0x07 };
// mask and value of lead byte's most significant bits, by length:
static const unsigned char leadMarkerMask[] = { 0x80, 0xE0, 0xF0, 0xF8 };
static const unsigned char leadMarkerVal[] = { 0x00, 0xC0, 0xE0, 0xF0 };
len--; // it's more convenient to work with 0-based length here
// extract the lead byte's value bits:
if ( (c & leadMarkerMask[len]) != leadMarkerVal[len] )
break;
code = c & leadValueMask[len];
// all remaining bytes, if any, are handled in the same way
// regardless of sequence's length:
for ( ; len; --len )
{
c = *++p;
if ( (c & 0xC0) != 0x80 )
return wxCONV_FAILED;
code <<= 6;
code |= c & 0x3F;
}
}
#ifdef WC_UTF16
// cast is ok because wchar_t == wxUint16 if WC_UTF16
if ( encode_utf16(code, (wxUint16 *)out) == 2 )
{
if ( out )
out++;
written++;
}
#else // !WC_UTF16
if ( out )
*out = code;
#endif // WC_UTF16/!WC_UTF16
if ( out )
out++;
written++;
}
return wxCONV_FAILED;
}
size_t
wxMBConvStrictUTF8::FromWChar(char *dst, size_t dstLen,
const wchar_t *src, size_t srcLen) const
{
char *out = dstLen ? dst : NULL;
size_t written = 0;
for ( const wchar_t *wp = src; ; wp++ )
{
if ( !(srcLen == wxNO_LEN ? *wp : srcLen--) )
{
// all done successfully, just add the trailing NULL if we are not
// using explicit length
if ( srcLen == wxNO_LEN )
{
if ( out )
{
if ( !dstLen )
break;
*out = '\0';
}
written++;
}
return written;
}
wxUint32 code;
#ifdef WC_UTF16
// cast is ok for WC_UTF16
if ( decode_utf16((const wxUint16 *)wp, code) == 2 )
{
// skip the next char too as we decoded a surrogate
wp++;
}
#else // wchar_t is UTF-32
code = *wp & 0x7fffffff;
#endif
unsigned len;
if ( code <= 0x7F )
{
len = 1;
if ( out )
{
if ( dstLen < len )
break;
out[0] = (char)code;
}
}
else if ( code <= 0x07FF )
{
len = 2;
if ( out )
{
if ( dstLen < len )
break;
// NB: this line takes 6 least significant bits, encodes them as
// 10xxxxxx and discards them so that the next byte can be encoded:
out[1] = 0x80 | (code & 0x3F); code >>= 6;
out[0] = 0xC0 | code;
}
}
else if ( code < 0xFFFF )
{
len = 3;
if ( out )
{
if ( dstLen < len )
break;
out[2] = 0x80 | (code & 0x3F); code >>= 6;
out[1] = 0x80 | (code & 0x3F); code >>= 6;
out[0] = 0xE0 | code;
}
}
else if ( code <= 0x10FFFF )
{
len = 4;
if ( out )
{
if ( dstLen < len )
break;
out[3] = 0x80 | (code & 0x3F); code >>= 6;
out[2] = 0x80 | (code & 0x3F); code >>= 6;
out[1] = 0x80 | (code & 0x3F); code >>= 6;
out[0] = 0xF0 | code;
}
}
else
{
wxFAIL_MSG( _T("trying to encode undefined Unicode character") );
break;
}
if ( out )
{
out += len;
dstLen -= len;
}
written += len;
}
// we only get here if an error occurs during decoding
return wxCONV_FAILED;
}
size_t wxMBConvUTF8::ToWChar(wchar_t *buf, size_t n,
const char *psz, size_t srcLen) const
{
if ( m_options == MAP_INVALID_UTF8_NOT )
return wxMBConvStrictUTF8::ToWChar(buf, n, psz, srcLen);
size_t len = 0;
while ((srcLen == wxNO_LEN ? *psz : srcLen--) && ((!buf) || (len < n)))
{
const char *opsz = psz;
bool invalid = false;
unsigned char cc = *psz++, fc = cc;
unsigned cnt;
for (cnt = 0; fc & 0x80; cnt++)
fc <<= 1;
if (!cnt)
{
// plain ASCII char
if (buf)
*buf++ = cc;
len++;
// escape the escape character for octal escapes
if ((m_options & MAP_INVALID_UTF8_TO_OCTAL)
&& cc == '\\' && (!buf || len < n))
{
if (buf)
*buf++ = cc;
len++;
}
}
else
{
cnt--;
if (!cnt)
{
// invalid UTF-8 sequence
invalid = true;
}
else
{
unsigned ocnt = cnt - 1;
wxUint32 res = cc & (0x3f >> cnt);
while (cnt--)
{
cc = *psz;
if ((cc & 0xC0) != 0x80)
{
// invalid UTF-8 sequence
invalid = true;
break;
}
psz++;
res = (res << 6) | (cc & 0x3f);
}
if (invalid || res <= utf8_max[ocnt])
{
// illegal UTF-8 encoding
invalid = true;
}
else if ((m_options & MAP_INVALID_UTF8_TO_PUA) &&
res >= wxUnicodePUA && res < wxUnicodePUAEnd)
{
// if one of our PUA characters turns up externally
// it must also be treated as an illegal sequence
// (a bit like you have to escape an escape character)
invalid = true;
}
else
{
#ifdef WC_UTF16
// cast is ok because wchar_t == wxUint16 if WC_UTF16
size_t pa = encode_utf16(res, (wxUint16 *)buf);
if (pa == wxCONV_FAILED)
{
invalid = true;
}
else
{
if (buf)
buf += pa;
len += pa;
}
#else // !WC_UTF16
if (buf)
*buf++ = (wchar_t)res;
len++;
#endif // WC_UTF16/!WC_UTF16
}
}
if (invalid)
{
if (m_options & MAP_INVALID_UTF8_TO_PUA)
{
while (opsz < psz && (!buf || len < n))
{
#ifdef WC_UTF16
// cast is ok because wchar_t == wxUuint16 if WC_UTF16
size_t pa = encode_utf16((unsigned char)*opsz + wxUnicodePUA, (wxUint16 *)buf);
wxASSERT(pa != wxCONV_FAILED);
if (buf)
buf += pa;
opsz++;
len += pa;
#else
if (buf)
*buf++ = (wchar_t)(wxUnicodePUA + (unsigned char)*opsz);
opsz++;
len++;
#endif
}
}
else if (m_options & MAP_INVALID_UTF8_TO_OCTAL)
{
while (opsz < psz && (!buf || len < n))
{
if ( buf && len + 3 < n )
{
unsigned char on = *opsz;
*buf++ = L'\\';
*buf++ = (wchar_t)( L'0' + on / 0100 );
*buf++ = (wchar_t)( L'0' + (on % 0100) / 010 );
*buf++ = (wchar_t)( L'0' + on % 010 );
}
opsz++;
len += 4;
}
}
else // MAP_INVALID_UTF8_NOT
{
return wxCONV_FAILED;
}
}
}
}
if (srcLen == wxNO_LEN && buf && (len < n))
*buf = 0;
return len + 1;
}
static inline bool isoctal(wchar_t wch)
{
return L'0' <= wch && wch <= L'7';
}
size_t wxMBConvUTF8::FromWChar(char *buf, size_t n,
const wchar_t *psz, size_t srcLen) const
{
if ( m_options == MAP_INVALID_UTF8_NOT )
return wxMBConvStrictUTF8::FromWChar(buf, n, psz, srcLen);
size_t len = 0;
while ((srcLen == wxNO_LEN ? *psz : srcLen--) && ((!buf) || (len < n)))
{
wxUint32 cc;
#ifdef WC_UTF16
// cast is ok for WC_UTF16
size_t pa = decode_utf16((const wxUint16 *)psz, cc);
psz += (pa == wxCONV_FAILED) ? 1 : pa;
#else
cc = (*psz++) & 0x7fffffff;
#endif
if ( (m_options & MAP_INVALID_UTF8_TO_PUA)
&& cc >= wxUnicodePUA && cc < wxUnicodePUAEnd )
{
if (buf)
*buf++ = (char)(cc - wxUnicodePUA);
len++;
}
else if ( (m_options & MAP_INVALID_UTF8_TO_OCTAL)
&& cc == L'\\' && psz[0] == L'\\' )
{
if (buf)
*buf++ = (char)cc;
psz++;
len++;
}
else if ( (m_options & MAP_INVALID_UTF8_TO_OCTAL) &&
cc == L'\\' &&
isoctal(psz[0]) && isoctal(psz[1]) && isoctal(psz[2]) )
{
if (buf)
{
*buf++ = (char) ((psz[0] - L'0') * 0100 +
(psz[1] - L'0') * 010 +
(psz[2] - L'0'));
}
psz += 3;
len++;
}
else
{
unsigned cnt;
for (cnt = 0; cc > utf8_max[cnt]; cnt++)
{
}
if (!cnt)
{
// plain ASCII char
if (buf)
*buf++ = (char) cc;
len++;
}
else
{
len += cnt + 1;
if (buf)
{
*buf++ = (char) ((-128 >> cnt) | ((cc >> (cnt * 6)) & (0x3f >> cnt)));
while (cnt--)
*buf++ = (char) (0x80 | ((cc >> (cnt * 6)) & 0x3f));
}
}
}
}
if (srcLen == wxNO_LEN && buf && (len < n))
*buf = 0;
return len + 1;
}
// ============================================================================
// UTF-16
// ============================================================================
#ifdef WORDS_BIGENDIAN
#define wxMBConvUTF16straight wxMBConvUTF16BE
#define wxMBConvUTF16swap wxMBConvUTF16LE
#else
#define wxMBConvUTF16swap wxMBConvUTF16BE
#define wxMBConvUTF16straight wxMBConvUTF16LE
#endif
/* static */
size_t wxMBConvUTF16Base::GetLength(const char *src, size_t srcLen)
{
if ( srcLen == wxNO_LEN )
{
// count the number of bytes in input, including the trailing NULs
const wxUint16 *inBuff = wx_reinterpret_cast(const wxUint16 *, src);
for ( srcLen = 1; *inBuff++; srcLen++ )
;
srcLen *= BYTES_PER_CHAR;
}
else // we already have the length
{
// we can only convert an entire number of UTF-16 characters
if ( srcLen % BYTES_PER_CHAR )
return wxCONV_FAILED;
}
return srcLen;
}
// case when in-memory representation is UTF-16 too
#ifdef WC_UTF16
// ----------------------------------------------------------------------------
// conversions without endianness change
// ----------------------------------------------------------------------------
size_t
wxMBConvUTF16straight::ToWChar(wchar_t *dst, size_t dstLen,
const char *src, size_t srcLen) const
{
// set up the scene for using memcpy() (which is presumably more efficient
// than copying the bytes one by one)
srcLen = GetLength(src, srcLen);
if ( srcLen == wxNO_LEN )
return wxCONV_FAILED;
const size_t inLen = srcLen / BYTES_PER_CHAR;
if ( dst )
{
if ( dstLen < inLen )
return wxCONV_FAILED;
memcpy(dst, src, srcLen);
}
return inLen;
}
size_t
wxMBConvUTF16straight::FromWChar(char *dst, size_t dstLen,
const wchar_t *src, size_t srcLen) const
{
if ( srcLen == wxNO_LEN )
srcLen = wxWcslen(src) + 1;
srcLen *= BYTES_PER_CHAR;
if ( dst )
{
if ( dstLen < srcLen )
return wxCONV_FAILED;
memcpy(dst, src, srcLen);
}
return srcLen;
}
// ----------------------------------------------------------------------------
// endian-reversing conversions
// ----------------------------------------------------------------------------
size_t
wxMBConvUTF16swap::ToWChar(wchar_t *dst, size_t dstLen,
const char *src, size_t srcLen) const
{
srcLen = GetLength(src, srcLen);
if ( srcLen == wxNO_LEN )
return wxCONV_FAILED;
srcLen /= BYTES_PER_CHAR;
if ( dst )
{
if ( dstLen < srcLen )
return wxCONV_FAILED;
const wxUint16 *inBuff = wx_reinterpret_cast(const wxUint16 *, src);
for ( size_t n = 0; n < srcLen; n++, inBuff++ )
{
*dst++ = wxUINT16_SWAP_ALWAYS(*inBuff);
}
}
return srcLen;
}
size_t
wxMBConvUTF16swap::FromWChar(char *dst, size_t dstLen,
const wchar_t *src, size_t srcLen) const
{
if ( srcLen == wxNO_LEN )
srcLen = wxWcslen(src) + 1;
srcLen *= BYTES_PER_CHAR;
if ( dst )
{
if ( dstLen < srcLen )
return wxCONV_FAILED;
wxUint16 *outBuff = wx_reinterpret_cast(wxUint16 *, dst);
for ( size_t n = 0; n < srcLen; n += BYTES_PER_CHAR, src++ )
{
*outBuff++ = wxUINT16_SWAP_ALWAYS(*src);
}
}
return srcLen;
}
#else // !WC_UTF16: wchar_t is UTF-32
// ----------------------------------------------------------------------------
// conversions without endianness change
// ----------------------------------------------------------------------------
size_t
wxMBConvUTF16straight::ToWChar(wchar_t *dst, size_t dstLen,
const char *src, size_t srcLen) const
{
srcLen = GetLength(src, srcLen);
if ( srcLen == wxNO_LEN )
return wxCONV_FAILED;
const size_t inLen = srcLen / BYTES_PER_CHAR;
if ( !dst )
{
// optimization: return maximal space which could be needed for this
// string even if the real size could be smaller if the buffer contains
// any surrogates
return inLen;
}
size_t outLen = 0;
const wxUint16 *inBuff = wx_reinterpret_cast(const wxUint16 *, src);
for ( const wxUint16 * const inEnd = inBuff + inLen; inBuff < inEnd; )
{
const wxUint32 ch = wxDecodeSurrogate(&inBuff);
if ( !inBuff )
return wxCONV_FAILED;
if ( ++outLen > dstLen )
return wxCONV_FAILED;
*dst++ = ch;
}
return outLen;
}
size_t
wxMBConvUTF16straight::FromWChar(char *dst, size_t dstLen,
const wchar_t *src, size_t srcLen) const
{
if ( srcLen == wxNO_LEN )
srcLen = wxWcslen(src) + 1;
size_t outLen = 0;
wxUint16 *outBuff = wx_reinterpret_cast(wxUint16 *, dst);
for ( size_t n = 0; n < srcLen; n++ )
{
wxUint16 cc[2];
const size_t numChars = encode_utf16(*src++, cc);
if ( numChars == wxCONV_FAILED )
return wxCONV_FAILED;
outLen += numChars * BYTES_PER_CHAR;
if ( outBuff )
{
if ( outLen > dstLen )
return wxCONV_FAILED;
*outBuff++ = cc[0];
if ( numChars == 2 )
{
// second character of a surrogate
*outBuff++ = cc[1];
}
}
}
return outLen;
}
// ----------------------------------------------------------------------------
// endian-reversing conversions
// ----------------------------------------------------------------------------
size_t
wxMBConvUTF16swap::ToWChar(wchar_t *dst, size_t dstLen,
const char *src, size_t srcLen) const
{
srcLen = GetLength(src, srcLen);
if ( srcLen == wxNO_LEN )
return wxCONV_FAILED;
const size_t inLen = srcLen / BYTES_PER_CHAR;
if ( !dst )
{
// optimization: return maximal space which could be needed for this
// string even if the real size could be smaller if the buffer contains
// any surrogates
return inLen;
}
size_t outLen = 0;
const wxUint16 *inBuff = wx_reinterpret_cast(const wxUint16 *, src);
for ( const wxUint16 * const inEnd = inBuff + inLen; inBuff < inEnd; )
{
wxUint32 ch;
wxUint16 tmp[2];
tmp[0] = wxUINT16_SWAP_ALWAYS(*inBuff);
inBuff++;
tmp[1] = wxUINT16_SWAP_ALWAYS(*inBuff);
const size_t numChars = decode_utf16(tmp, ch);
if ( numChars == wxCONV_FAILED )
return wxCONV_FAILED;
if ( numChars == 2 )
inBuff++;
if ( ++outLen > dstLen )
return wxCONV_FAILED;
*dst++ = ch;
}
return outLen;
}
size_t
wxMBConvUTF16swap::FromWChar(char *dst, size_t dstLen,
const wchar_t *src, size_t srcLen) const
{
if ( srcLen == wxNO_LEN )
srcLen = wxWcslen(src) + 1;
size_t outLen = 0;
wxUint16 *outBuff = wx_reinterpret_cast(wxUint16 *, dst);
for ( const wchar_t *srcEnd = src + srcLen; src < srcEnd; src++ )
{
wxUint16 cc[2];
const size_t numChars = encode_utf16(*src, cc);
if ( numChars == wxCONV_FAILED )
return wxCONV_FAILED;
outLen += numChars * BYTES_PER_CHAR;
if ( outBuff )
{
if ( outLen > dstLen )
return wxCONV_FAILED;
*outBuff++ = wxUINT16_SWAP_ALWAYS(cc[0]);
if ( numChars == 2 )
{
// second character of a surrogate
*outBuff++ = wxUINT16_SWAP_ALWAYS(cc[1]);
}
}
}
return outLen;
}
#endif // WC_UTF16/!WC_UTF16
// ============================================================================
// UTF-32
// ============================================================================
#ifdef WORDS_BIGENDIAN
#define wxMBConvUTF32straight wxMBConvUTF32BE
#define wxMBConvUTF32swap wxMBConvUTF32LE
#else
#define wxMBConvUTF32swap wxMBConvUTF32BE
#define wxMBConvUTF32straight wxMBConvUTF32LE
#endif
WXDLLIMPEXP_DATA_BASE(wxMBConvUTF32LE) wxConvUTF32LE;
WXDLLIMPEXP_DATA_BASE(wxMBConvUTF32BE) wxConvUTF32BE;
/* static */
size_t wxMBConvUTF32Base::GetLength(const char *src, size_t srcLen)
{
if ( srcLen == wxNO_LEN )
{
// count the number of bytes in input, including the trailing NULs
const wxUint32 *inBuff = wx_reinterpret_cast(const wxUint32 *, src);
for ( srcLen = 1; *inBuff++; srcLen++ )
;
srcLen *= BYTES_PER_CHAR;
}
else // we already have the length
{
// we can only convert an entire number of UTF-32 characters
if ( srcLen % BYTES_PER_CHAR )
return wxCONV_FAILED;
}
return srcLen;
}
// case when in-memory representation is UTF-16
#ifdef WC_UTF16
// ----------------------------------------------------------------------------
// conversions without endianness change
// ----------------------------------------------------------------------------
size_t
wxMBConvUTF32straight::ToWChar(wchar_t *dst, size_t dstLen,
const char *src, size_t srcLen) const
{
srcLen = GetLength(src, srcLen);
if ( srcLen == wxNO_LEN )
return wxCONV_FAILED;
const wxUint32 *inBuff = wx_reinterpret_cast(const wxUint32 *, src);
const size_t inLen = srcLen / BYTES_PER_CHAR;
size_t outLen = 0;
for ( size_t n = 0; n < inLen; n++ )
{
wxUint16 cc[2];
const size_t numChars = encode_utf16(*inBuff++, cc);
if ( numChars == wxCONV_FAILED )
return wxCONV_FAILED;
outLen += numChars;
if ( dst )
{
if ( outLen > dstLen )
return wxCONV_FAILED;
*dst++ = cc[0];
if ( numChars == 2 )
{
// second character of a surrogate
*dst++ = cc[1];
}
}
}
return outLen;
}
size_t
wxMBConvUTF32straight::FromWChar(char *dst, size_t dstLen,
const wchar_t *src, size_t srcLen) const
{
if ( srcLen == wxNO_LEN )
srcLen = wxWcslen(src) + 1;
if ( !dst )
{
// optimization: return maximal space which could be needed for this
// string instead of the exact amount which could be less if there are
// any surrogates in the input
//
// we consider that surrogates are rare enough to make it worthwhile to
// avoid running the loop below at the cost of slightly extra memory
// consumption
return srcLen * BYTES_PER_CHAR;
}
wxUint32 *outBuff = wx_reinterpret_cast(wxUint32 *, dst);
size_t outLen = 0;
for ( const wchar_t * const srcEnd = src + srcLen; src < srcEnd; )
{
const wxUint32 ch = wxDecodeSurrogate(&src);
if ( !src )
return wxCONV_FAILED;
outLen += BYTES_PER_CHAR;
if ( outLen > dstLen )
return wxCONV_FAILED;
*outBuff++ = ch;
}
return outLen;
}
// ----------------------------------------------------------------------------
// endian-reversing conversions
// ----------------------------------------------------------------------------
size_t
wxMBConvUTF32swap::ToWChar(wchar_t *dst, size_t dstLen,
const char *src, size_t srcLen) const
{
srcLen = GetLength(src, srcLen);
if ( srcLen == wxNO_LEN )
return wxCONV_FAILED;
const wxUint32 *inBuff = wx_reinterpret_cast(const wxUint32 *, src);
const size_t inLen = srcLen / BYTES_PER_CHAR;
size_t outLen = 0;
for ( size_t n = 0; n < inLen; n++, inBuff++ )
{
wxUint16 cc[2];
const size_t numChars = encode_utf16(wxUINT32_SWAP_ALWAYS(*inBuff), cc);
if ( numChars == wxCONV_FAILED )
return wxCONV_FAILED;
outLen += numChars;
if ( dst )
{
if ( outLen > dstLen )
return wxCONV_FAILED;
*dst++ = cc[0];
if ( numChars == 2 )
{
// second character of a surrogate
*dst++ = cc[1];
}
}
}
return outLen;
}
size_t
wxMBConvUTF32swap::FromWChar(char *dst, size_t dstLen,
const wchar_t *src, size_t srcLen) const
{
if ( srcLen == wxNO_LEN )
srcLen = wxWcslen(src) + 1;
if ( !dst )
{
// optimization: return maximal space which could be needed for this
// string instead of the exact amount which could be less if there are
// any surrogates in the input
//
// we consider that surrogates are rare enough to make it worthwhile to
// avoid running the loop below at the cost of slightly extra memory
// consumption
return srcLen*BYTES_PER_CHAR;
}
wxUint32 *outBuff = wx_reinterpret_cast(wxUint32 *, dst);
size_t outLen = 0;
for ( const wchar_t * const srcEnd = src + srcLen; src < srcEnd; )
{
const wxUint32 ch = wxDecodeSurrogate(&src);
if ( !src )
return wxCONV_FAILED;
outLen += BYTES_PER_CHAR;
if ( outLen > dstLen )
return wxCONV_FAILED;
*outBuff++ = wxUINT32_SWAP_ALWAYS(ch);
}
return outLen;
}
#else // !WC_UTF16: wchar_t is UTF-32
// ----------------------------------------------------------------------------
// conversions without endianness change
// ----------------------------------------------------------------------------
size_t
wxMBConvUTF32straight::ToWChar(wchar_t *dst, size_t dstLen,
const char *src, size_t srcLen) const
{
// use memcpy() as it should be much faster than hand-written loop
srcLen = GetLength(src, srcLen);
if ( srcLen == wxNO_LEN )
return wxCONV_FAILED;
const size_t inLen = srcLen/BYTES_PER_CHAR;
if ( dst )
{
if ( dstLen < inLen )
return wxCONV_FAILED;
memcpy(dst, src, srcLen);
}
return inLen;
}
size_t
wxMBConvUTF32straight::FromWChar(char *dst, size_t dstLen,
const wchar_t *src, size_t srcLen) const
{
if ( srcLen == wxNO_LEN )
srcLen = wxWcslen(src) + 1;
srcLen *= BYTES_PER_CHAR;
if ( dst )
{
if ( dstLen < srcLen )
return wxCONV_FAILED;
memcpy(dst, src, srcLen);
}
return srcLen;
}
// ----------------------------------------------------------------------------
// endian-reversing conversions
// ----------------------------------------------------------------------------
size_t
wxMBConvUTF32swap::ToWChar(wchar_t *dst, size_t dstLen,
const char *src, size_t srcLen) const
{
srcLen = GetLength(src, srcLen);
if ( srcLen == wxNO_LEN )
return wxCONV_FAILED;
srcLen /= BYTES_PER_CHAR;
if ( dst )
{
if ( dstLen < srcLen )
return wxCONV_FAILED;
const wxUint32 *inBuff = wx_reinterpret_cast(const wxUint32 *, src);
for ( size_t n = 0; n < srcLen; n++, inBuff++ )
{
*dst++ = wxUINT32_SWAP_ALWAYS(*inBuff);
}
}
return srcLen;
}
size_t
wxMBConvUTF32swap::FromWChar(char *dst, size_t dstLen,
const wchar_t *src, size_t srcLen) const
{
if ( srcLen == wxNO_LEN )
srcLen = wxWcslen(src) + 1;
srcLen *= BYTES_PER_CHAR;
if ( dst )
{
if ( dstLen < srcLen )
return wxCONV_FAILED;
wxUint32 *outBuff = wx_reinterpret_cast(wxUint32 *, dst);
for ( size_t n = 0; n < srcLen; n += BYTES_PER_CHAR, src++ )
{
*outBuff++ = wxUINT32_SWAP_ALWAYS(*src);
}
}
return srcLen;
}
#endif // WC_UTF16/!WC_UTF16
// ============================================================================
// The classes doing conversion using the iconv_xxx() functions
// ============================================================================
#ifdef HAVE_ICONV
// VS: glibc 2.1.3 is broken in that iconv() conversion to/from UCS4 fails with
// E2BIG if output buffer is _exactly_ as big as needed. Such case is
// (unless there's yet another bug in glibc) the only case when iconv()
// returns with (size_t)-1 (which means error) and says there are 0 bytes
// left in the input buffer -- when _real_ error occurs,
// bytes-left-in-input buffer is non-zero. Hence, this alternative test for
// iconv() failure.
// [This bug does not appear in glibc 2.2.]
#if defined(__GLIBC__) && __GLIBC__ == 2 && __GLIBC_MINOR__ <= 1
#define ICONV_FAILED(cres, bufLeft) ((cres == (size_t)-1) && \
(errno != E2BIG || bufLeft != 0))
#else
#define ICONV_FAILED(cres, bufLeft) (cres == (size_t)-1)
#endif
#define ICONV_CHAR_CAST(x) ((ICONV_CONST char **)(x))
#define ICONV_T_INVALID ((iconv_t)-1)
#if SIZEOF_WCHAR_T == 4
#define WC_BSWAP wxUINT32_SWAP_ALWAYS
#define WC_ENC wxFONTENCODING_UTF32
#elif SIZEOF_WCHAR_T == 2
#define WC_BSWAP wxUINT16_SWAP_ALWAYS
#define WC_ENC wxFONTENCODING_UTF16
#else // sizeof(wchar_t) != 2 nor 4
// does this ever happen?
#error "Unknown sizeof(wchar_t): please report this to wx-dev@lists.wxwindows.org"
#endif
// ----------------------------------------------------------------------------
// wxMBConv_iconv: encapsulates an iconv character set
// ----------------------------------------------------------------------------
class wxMBConv_iconv : public wxMBConv
{
public:
wxMBConv_iconv(const char *name);
virtual ~wxMBConv_iconv();
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;
// classify this encoding as explained in wxMBConv::GetMBNulLen() comment
virtual size_t GetMBNulLen() const;
#if wxUSE_UNICODE_UTF8
virtual bool IsUTF8() const;
#endif
virtual wxMBConv *Clone() const
{
wxMBConv_iconv *p = new wxMBConv_iconv(m_name.ToAscii());
p->m_minMBCharWidth = m_minMBCharWidth;
return p;
}
bool IsOk() const
{ return (m2w != ICONV_T_INVALID) && (w2m != ICONV_T_INVALID); }
protected:
// the iconv handlers used to translate from multibyte
// to wide char and in the other direction
iconv_t m2w,
w2m;
#if wxUSE_THREADS
// guards access to m2w and w2m objects
wxMutex m_iconvMutex;
#endif
private:
// the name (for iconv_open()) of a wide char charset -- if none is
// available on this machine, it will remain NULL
static wxString ms_wcCharsetName;
// true if the wide char encoding we use (i.e. ms_wcCharsetName) has
// different endian-ness than the native one
static bool ms_wcNeedsSwap;
// name of the encoding handled by this conversion
wxString m_name;
// cached result of GetMBNulLen(); set to 0 meaning "unknown"
// initially
size_t m_minMBCharWidth;
};
// make the constructor available for unit testing
WXDLLIMPEXP_BASE wxMBConv* new_wxMBConv_iconv( const char* name )
{
wxMBConv_iconv* result = new wxMBConv_iconv( name );
if ( !result->IsOk() )
{
delete result;
return 0;
}
return result;
}
wxString wxMBConv_iconv::ms_wcCharsetName;
bool wxMBConv_iconv::ms_wcNeedsSwap = false;
wxMBConv_iconv::wxMBConv_iconv(const char *name)
: m_name(name)
{
m_minMBCharWidth = 0;
// check for charset that represents wchar_t:
if ( ms_wcCharsetName.empty() )
{
wxLogTrace(TRACE_STRCONV, _T("Looking for wide char codeset:"));
#if wxUSE_FONTMAP
const wxChar **names = wxFontMapperBase::GetAllEncodingNames(WC_ENC);
#else // !wxUSE_FONTMAP
static const wxChar *names_static[] =
{
#if SIZEOF_WCHAR_T == 4
_T("UCS-4"),
#elif SIZEOF_WCHAR_T = 2
_T("UCS-2"),
#endif
NULL
};
const wxChar **names = names_static;
#endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
for ( ; *names && ms_wcCharsetName.empty(); ++names )
{
const wxString nameCS(*names);
// first try charset with explicit bytesex info (e.g. "UCS-4LE"):
wxString nameXE(nameCS);
#ifdef WORDS_BIGENDIAN
nameXE += _T("BE");
#else // little endian
nameXE += _T("LE");
#endif
wxLogTrace(TRACE_STRCONV, _T(" trying charset \"%s\""),
nameXE.c_str());
m2w = iconv_open(nameXE.ToAscii(), name);
if ( m2w == ICONV_T_INVALID )
{
// try charset w/o bytesex info (e.g. "UCS4")
wxLogTrace(TRACE_STRCONV, _T(" trying charset \"%s\""),
nameCS.c_str());
m2w = iconv_open(nameCS.ToAscii(), name);
// and check for bytesex ourselves:
if ( m2w != ICONV_T_INVALID )
{
char buf[2], *bufPtr;
wchar_t wbuf[2], *wbufPtr;
size_t insz, outsz;
size_t res;
buf[0] = 'A';
buf[1] = 0;
wbuf[0] = 0;
insz = 2;
outsz = SIZEOF_WCHAR_T * 2;
wbufPtr = wbuf;
bufPtr = buf;
res = iconv(
m2w, ICONV_CHAR_CAST(&bufPtr), &insz,
(char**)&wbufPtr, &outsz);
if (ICONV_FAILED(res, insz))
{
wxLogLastError(wxT("iconv"));
wxLogError(_("Conversion to charset '%s' doesn't work."),
nameCS.c_str());
}
else // ok, can convert to this encoding, remember it
{
ms_wcCharsetName = nameCS;
ms_wcNeedsSwap = wbuf[0] != (wchar_t)buf[0];
}
}
}
else // use charset not requiring byte swapping
{
ms_wcCharsetName = nameXE;
}
}
wxLogTrace(TRACE_STRCONV,
wxT("iconv wchar_t charset is \"%s\"%s"),
ms_wcCharsetName.empty() ? wxString("<none>")
: ms_wcCharsetName,
ms_wcNeedsSwap ? _T(" (needs swap)")
: _T(""));
}
else // we already have ms_wcCharsetName
{
m2w = iconv_open(ms_wcCharsetName.ToAscii(), name);
}
if ( ms_wcCharsetName.empty() )
{
w2m = ICONV_T_INVALID;
}
else
{
w2m = iconv_open(name, ms_wcCharsetName.ToAscii());
if ( w2m == ICONV_T_INVALID )
{
wxLogTrace(TRACE_STRCONV,
wxT("\"%s\" -> \"%s\" works but not the converse!?"),
ms_wcCharsetName.c_str(), name);
}
}
}
wxMBConv_iconv::~wxMBConv_iconv()
{
if ( m2w != ICONV_T_INVALID )
iconv_close(m2w);
if ( w2m != ICONV_T_INVALID )
iconv_close(w2m);
}
size_t wxMBConv_iconv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
{
// find the string length: notice that must be done differently for
// NUL-terminated strings and UTF-16/32 which are terminated with 2/4 NULs
size_t inbuf;
const size_t nulLen = GetMBNulLen();
switch ( nulLen )
{
default:
return wxCONV_FAILED;
case 1:
inbuf = strlen(psz); // arguably more optimized than our version
break;
case 2:
case 4:
// for UTF-16/32 not only we need to have 2/4 consecutive NULs but
// they also have to start at character boundary and not span two
// adjacent characters
const char *p;
for ( p = psz; NotAllNULs(p, nulLen); p += nulLen )
;
inbuf = p - psz;
break;
}
#if wxUSE_THREADS
// NB: iconv() is MT-safe, but each thread must use its own iconv_t handle.
// Unfortunately there are a couple of global wxCSConv objects such as
// wxConvLocal that are used all over wx code, so we have to make sure
// the handle is used by at most one thread at the time. Otherwise
// only a few wx classes would be safe to use from non-main threads
// as MB<->WC conversion would fail "randomly".
wxMutexLocker lock(wxConstCast(this, wxMBConv_iconv)->m_iconvMutex);
#endif // wxUSE_THREADS
size_t outbuf = n * SIZEOF_WCHAR_T;
size_t res, cres;
// VS: Use these instead of psz, buf because iconv() modifies its arguments:
wchar_t *bufPtr = buf;
const char *pszPtr = psz;
if (buf)
{
// have destination buffer, convert there
cres = iconv(m2w,
ICONV_CHAR_CAST(&pszPtr), &inbuf,
(char**)&bufPtr, &outbuf);
res = n - (outbuf / SIZEOF_WCHAR_T);
if (ms_wcNeedsSwap)
{
// convert to native endianness
for ( unsigned i = 0; i < res; i++ )
buf[n] = WC_BSWAP(buf[i]);
}
// NUL-terminate the string if there is any space left
if (res < n)
buf[res] = 0;
}
else
{
// no destination buffer... convert using temp buffer
// to calculate destination buffer requirement
wchar_t tbuf[8];
res = 0;
do
{
bufPtr = tbuf;
outbuf = 8 * SIZEOF_WCHAR_T;
cres = iconv(m2w,
ICONV_CHAR_CAST(&pszPtr), &inbuf,
(char**)&bufPtr, &outbuf );
res += 8 - (outbuf / SIZEOF_WCHAR_T);
}
while ((cres == (size_t)-1) && (errno == E2BIG));
}
if (ICONV_FAILED(cres, inbuf))
{
//VS: it is ok if iconv fails, hence trace only
wxLogTrace(TRACE_STRCONV, wxT("iconv failed: %s"), wxSysErrorMsg(wxSysErrorCode()));
return wxCONV_FAILED;
}
return res;
}
size_t wxMBConv_iconv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
{
#if wxUSE_THREADS
// NB: explained in MB2WC
wxMutexLocker lock(wxConstCast(this, wxMBConv_iconv)->m_iconvMutex);
#endif
size_t inlen = wxWcslen(psz);
size_t inbuf = inlen * SIZEOF_WCHAR_T;
size_t outbuf = n;
size_t res, cres;
wchar_t *tmpbuf = 0;
if (ms_wcNeedsSwap)
{
// need to copy to temp buffer to switch endianness
// (doing WC_BSWAP twice on the original buffer won't help, as it
// could be in read-only memory, or be accessed in some other thread)
tmpbuf = (wchar_t *)malloc(inbuf + SIZEOF_WCHAR_T);
for ( size_t i = 0; i < inlen; i++ )
tmpbuf[n] = WC_BSWAP(psz[i]);
tmpbuf[inlen] = L'\0';
psz = tmpbuf;
}
if (buf)
{
// have destination buffer, convert there
cres = iconv( w2m, ICONV_CHAR_CAST(&psz), &inbuf, &buf, &outbuf );
res = n - outbuf;
// NB: iconv was given only wcslen(psz) characters on input, and so
// it couldn't convert the trailing zero. Let's do it ourselves
// if there's some room left for it in the output buffer.
if (res < n)
buf[0] = 0;
}
else
{
// no destination buffer: convert using temp buffer
// to calculate destination buffer requirement
char tbuf[16];
res = 0;
do
{
buf = tbuf;
outbuf = 16;
cres = iconv( w2m, ICONV_CHAR_CAST(&psz), &inbuf, &buf, &outbuf );
res += 16 - outbuf;
}
while ((cres == (size_t)-1) && (errno == E2BIG));
}
if (ms_wcNeedsSwap)
{
free(tmpbuf);
}
if (ICONV_FAILED(cres, inbuf))
{
wxLogTrace(TRACE_STRCONV, wxT("iconv failed: %s"), wxSysErrorMsg(wxSysErrorCode()));
return wxCONV_FAILED;
}
return res;
}
size_t wxMBConv_iconv::GetMBNulLen() const
{
if ( m_minMBCharWidth == 0 )
{
wxMBConv_iconv * const self = wxConstCast(this, wxMBConv_iconv);
#if wxUSE_THREADS
// NB: explained in MB2WC
wxMutexLocker lock(self->m_iconvMutex);
#endif
const wchar_t *wnul = L"";
char buf[8]; // should be enough for NUL in any encoding
size_t inLen = sizeof(wchar_t),
outLen = WXSIZEOF(buf);
char *inBuff = (char *)wnul;
char *outBuff = buf;
if ( iconv(w2m, ICONV_CHAR_CAST(&inBuff), &inLen, &outBuff, &outLen) == (size_t)-1 )
{
self->m_minMBCharWidth = (size_t)-1;
}
else // ok
{
self->m_minMBCharWidth = outBuff - buf;
}
}
return m_minMBCharWidth;
}
#if wxUSE_UNICODE_UTF8
bool wxMBConv_iconv::IsUTF8() const
{
return wxStricmp(m_name, "UTF-8") == 0 ||
wxStricmp(m_name, "UTF8") == 0;
}
#endif
#endif // HAVE_ICONV
// ============================================================================
// Win32 conversion classes
// ============================================================================
#ifdef wxHAVE_WIN32_MB2WC
// from utils.cpp
#if wxUSE_FONTMAP
extern WXDLLIMPEXP_BASE long wxCharsetToCodepage(const char *charset);
extern WXDLLIMPEXP_BASE long wxEncodingToCodepage(wxFontEncoding encoding);
#endif
class wxMBConv_win32 : public wxMBConv
{
public:
wxMBConv_win32()
{
m_CodePage = CP_ACP;
m_minMBCharWidth = 0;
}
wxMBConv_win32(const wxMBConv_win32& conv)
: wxMBConv()
{
m_CodePage = conv.m_CodePage;
m_minMBCharWidth = conv.m_minMBCharWidth;
}
#if wxUSE_FONTMAP
wxMBConv_win32(const char* name)
{
m_CodePage = wxCharsetToCodepage(name);
m_minMBCharWidth = 0;
}
wxMBConv_win32(wxFontEncoding encoding)
{
m_CodePage = wxEncodingToCodepage(encoding);
m_minMBCharWidth = 0;
}
#endif // wxUSE_FONTMAP
virtual size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const
{
// note that we have to use MB_ERR_INVALID_CHARS flag as it without it
// the behaviour is not compatible with the Unix version (using iconv)
// and break the library itself, e.g. wxTextInputStream::NextChar()
// wouldn't work if reading an incomplete MB char didn't result in an
// error
//
// Moreover, MB_ERR_INVALID_CHARS is only supported on Win 2K SP4 or
// Win XP or newer and it is not supported for UTF-[78] so we always
// use our own conversions in this case. See
// http://blogs.msdn.com/michkap/archive/2005/04/19/409566.aspx
// http://msdn.microsoft.com/library/en-us/intl/unicode_17si.asp
if ( m_CodePage == CP_UTF8 )
{
return wxMBConvUTF8().MB2WC(buf, psz, n);
}
if ( m_CodePage == CP_UTF7 )
{
return wxMBConvUTF7().MB2WC(buf, psz, n);
}
int flags = 0;
if ( (m_CodePage < 50000 && m_CodePage != CP_SYMBOL) &&
IsAtLeastWin2kSP4() )
{
flags = MB_ERR_INVALID_CHARS;
}
const size_t len = ::MultiByteToWideChar
(
m_CodePage, // code page
flags, // flags: fall on error
psz, // input string
-1, // its length (NUL-terminated)
buf, // output string
buf ? n : 0 // size of output buffer
);
if ( !len )
{
// function totally failed
return wxCONV_FAILED;
}
// if we were really converting and didn't use MB_ERR_INVALID_CHARS,
// check if we succeeded, by doing a double trip:
if ( !flags && buf )
{
const size_t mbLen = strlen(psz);
wxCharBuffer mbBuf(mbLen);
if ( ::WideCharToMultiByte
(
m_CodePage,
0,
buf,
-1,
mbBuf.data(),
mbLen + 1, // size in bytes, not length
NULL,
NULL
) == 0 ||
strcmp(mbBuf, psz) != 0 )
{
// we didn't obtain the same thing we started from, hence
// the conversion was lossy and we consider that it failed
return wxCONV_FAILED;
}
}
// note that it returns count of written chars for buf != NULL and size
// of the needed buffer for buf == NULL so in either case the length of
// the string (which never includes the terminating NUL) is one less
return len - 1;
}
virtual size_t WC2MB(char *buf, const wchar_t *pwz, size_t n) const
{
/*
we have a problem here: by default, WideCharToMultiByte() may
replace characters unrepresentable in the target code page with bad
quality approximations such as turning "1/2" symbol (U+00BD) into
"1" for the code pages which don't have it and we, obviously, want
to avoid this at any price
the trouble is that this function does it _silently_, i.e. it won't
even tell us whether it did or not... Win98/2000 and higher provide
WC_NO_BEST_FIT_CHARS but it doesn't work for the older systems and
we have to resort to a round trip, i.e. check that converting back
results in the same string -- this is, of course, expensive but
otherwise we simply can't be sure to not garble the data.
*/
// determine if we can rely on WC_NO_BEST_FIT_CHARS: according to MSDN
// it doesn't work with CJK encodings (which we test for rather roughly
// here...) nor with UTF-7/8 nor, of course, with Windows versions not
// supporting it
BOOL usedDef wxDUMMY_INITIALIZE(false);
BOOL *pUsedDef;
int flags;
if ( CanUseNoBestFit() && m_CodePage < 50000 )
{
// it's our lucky day
flags = WC_NO_BEST_FIT_CHARS;
pUsedDef = &usedDef;
}
else // old system or unsupported encoding
{
flags = 0;
pUsedDef = NULL;
}
const size_t len = ::WideCharToMultiByte
(
m_CodePage, // code page
flags, // either none or no best fit
pwz, // input string
-1, // it is (wide) NUL-terminated
buf, // output buffer
buf ? n : 0, // and its size
NULL, // default "replacement" char
pUsedDef // [out] was it used?
);
if ( !len )
{
// function totally failed
return wxCONV_FAILED;
}
// we did something, check if we really succeeded
if ( flags )
{
// check if the conversion failed, i.e. if any replacements
// were done
if ( usedDef )
return wxCONV_FAILED;
}
else // we must resort to double tripping...
{
// first we need to ensure that we really have the MB data: this is
// not the case if we're called with NULL buffer, in which case we
// need to do the conversion yet again
wxCharBuffer bufDef;
if ( !buf )
{
bufDef = wxCharBuffer(len);
buf = bufDef.data();
if ( !::WideCharToMultiByte(m_CodePage, flags, pwz, -1,
buf, len, NULL, NULL) )
return wxCONV_FAILED;
}
if ( !n )
n = wcslen(pwz);
wxWCharBuffer wcBuf(n);
if ( MB2WC(wcBuf.data(), buf, n + 1) == wxCONV_FAILED ||
wcscmp(wcBuf, pwz) != 0 )
{
// we didn't obtain the same thing we started from, hence
// the conversion was lossy and we consider that it failed
return wxCONV_FAILED;
}
}
// see the comment above for the reason of "len - 1"
return len - 1;
}
virtual size_t GetMBNulLen() const
{
if ( m_minMBCharWidth == 0 )
{
int len = ::WideCharToMultiByte
(
m_CodePage, // code page
0, // no flags
L"", // input string
1, // translate just the NUL
NULL, // output buffer
0, // and its size
NULL, // no replacement char
NULL // [out] don't care if it was used
);
wxMBConv_win32 * const self = wxConstCast(this, wxMBConv_win32);
switch ( len )
{
default:
wxLogDebug(_T("Unexpected NUL length %d"), len);
self->m_minMBCharWidth = (size_t)-1;
break;
case 0:
self->m_minMBCharWidth = (size_t)-1;
break;
case 1:
case 2:
case 4:
self->m_minMBCharWidth = len;
break;
}
}
return m_minMBCharWidth;
}
virtual wxMBConv *Clone() const { return new wxMBConv_win32(*this); }
bool IsOk() const { return m_CodePage != -1; }
private:
static bool CanUseNoBestFit()
{
static int s_isWin98Or2k = -1;
if ( s_isWin98Or2k == -1 )
{
int verMaj, verMin;
switch ( wxGetOsVersion(&verMaj, &verMin) )
{
case wxOS_WINDOWS_9X:
s_isWin98Or2k = verMaj >= 4 && verMin >= 10;
break;
case wxOS_WINDOWS_NT:
s_isWin98Or2k = verMaj >= 5;
break;
default:
// unknown: be conservative by default
s_isWin98Or2k = 0;
break;
}
wxASSERT_MSG( s_isWin98Or2k != -1, _T("should be set above") );
}
return s_isWin98Or2k == 1;
}
static bool IsAtLeastWin2kSP4()
{
#ifdef __WXWINCE__
return false;
#else
static int s_isAtLeastWin2kSP4 = -1;
if ( s_isAtLeastWin2kSP4 == -1 )
{
OSVERSIONINFOEX ver;
memset(&ver, 0, sizeof(ver));
ver.dwOSVersionInfoSize = sizeof(ver);
GetVersionEx((OSVERSIONINFO*)&ver);
s_isAtLeastWin2kSP4 =
((ver.dwMajorVersion > 5) || // Vista+
(ver.dwMajorVersion == 5 && ver.dwMinorVersion > 0) || // XP/2003
(ver.dwMajorVersion == 5 && ver.dwMinorVersion == 0 &&
ver.wServicePackMajor >= 4)) // 2000 SP4+
? 1 : 0;
}
return s_isAtLeastWin2kSP4 == 1;
#endif
}
// the code page we're working with
long m_CodePage;
// cached result of GetMBNulLen(), set to 0 initially meaning
// "unknown"
size_t m_minMBCharWidth;
};
#endif // wxHAVE_WIN32_MB2WC
// ============================================================================
// wxEncodingConverter based conversion classes
// ============================================================================
#if wxUSE_FONTMAP
class wxMBConv_wxwin : public wxMBConv
{
private:
void Init()
{
// Refuse to use broken wxEncodingConverter code for Mac-specific encodings.
// The wxMBConv_cf class does a better job.
m_ok = (m_enc < wxFONTENCODING_MACMIN || m_enc > wxFONTENCODING_MACMAX) &&
m2w.Init(m_enc, wxFONTENCODING_UNICODE) &&
w2m.Init(wxFONTENCODING_UNICODE, m_enc);
}
public:
// temporarily just use wxEncodingConverter stuff,
// so that it works while a better implementation is built
wxMBConv_wxwin(const char* name)
{
if (name)
m_enc = wxFontMapperBase::Get()->CharsetToEncoding(name, false);
else
m_enc = wxFONTENCODING_SYSTEM;
Init();
}
wxMBConv_wxwin(wxFontEncoding enc)
{
m_enc = enc;
Init();
}
size_t MB2WC(wchar_t *buf, const char *psz, size_t WXUNUSED(n)) const
{
size_t inbuf = strlen(psz);
if (buf)
{
if (!m2w.Convert(psz, buf))
return wxCONV_FAILED;
}
return inbuf;
}
size_t WC2MB(char *buf, const wchar_t *psz, size_t WXUNUSED(n)) const
{
const size_t inbuf = wxWcslen(psz);
if (buf)
{
if (!w2m.Convert(psz, buf))
return wxCONV_FAILED;
}
return inbuf;
}
virtual size_t GetMBNulLen() const
{
switch ( m_enc )
{
case wxFONTENCODING_UTF16BE:
case wxFONTENCODING_UTF16LE:
return 2;
case wxFONTENCODING_UTF32BE:
case wxFONTENCODING_UTF32LE:
return 4;
default:
return 1;
}
}
virtual wxMBConv *Clone() const { return new wxMBConv_wxwin(m_enc); }
bool IsOk() const { return m_ok; }
public:
wxFontEncoding m_enc;
wxEncodingConverter m2w, w2m;
private:
// were we initialized successfully?
bool m_ok;
DECLARE_NO_COPY_CLASS(wxMBConv_wxwin)
};
// make the constructors available for unit testing
WXDLLIMPEXP_BASE wxMBConv* new_wxMBConv_wxwin( const char* name )
{
wxMBConv_wxwin* result = new wxMBConv_wxwin( name );
if ( !result->IsOk() )
{
delete result;
return 0;
}
return result;
}
#endif // wxUSE_FONTMAP
// ============================================================================
// wxCSConv implementation
// ============================================================================
void wxCSConv::Init()
{
m_name = NULL;
m_convReal = NULL;
m_deferred = true;
}
wxCSConv::wxCSConv(const wxString& charset)
{
Init();
if ( !charset.empty() )
{
SetName(charset.ToAscii());
}
#if wxUSE_FONTMAP
m_encoding = wxFontMapperBase::GetEncodingFromName(charset);
#else
m_encoding = wxFONTENCODING_SYSTEM;
#endif
}
wxCSConv::wxCSConv(wxFontEncoding encoding)
{
if ( encoding == wxFONTENCODING_MAX || encoding == wxFONTENCODING_DEFAULT )
{
wxFAIL_MSG( _T("invalid encoding value in wxCSConv ctor") );
encoding = wxFONTENCODING_SYSTEM;
}
Init();
m_encoding = encoding;
}
wxCSConv::~wxCSConv()
{
Clear();
}
wxCSConv::wxCSConv(const wxCSConv& conv)
: wxMBConv()
{
Init();
SetName(conv.m_name);
m_encoding = conv.m_encoding;
}
wxCSConv& wxCSConv::operator=(const wxCSConv& conv)
{
Clear();
SetName(conv.m_name);
m_encoding = conv.m_encoding;
return *this;
}
void wxCSConv::Clear()
{
free(m_name);
delete m_convReal;
m_name = NULL;
m_convReal = NULL;
}
void wxCSConv::SetName(const char *charset)
{
if (charset)
{
m_name = wxStrdup(charset);
m_deferred = true;
}
}
#if wxUSE_FONTMAP
WX_DECLARE_HASH_MAP( wxFontEncoding, wxString, wxIntegerHash, wxIntegerEqual,
wxEncodingNameCache );
static wxEncodingNameCache gs_nameCache;
#endif
wxMBConv *wxCSConv::DoCreate() const
{
#if wxUSE_FONTMAP
wxLogTrace(TRACE_STRCONV,
wxT("creating conversion for %s"),
(m_name ? m_name
: (const char*)wxFontMapperBase::GetEncodingName(m_encoding).mb_str()));
#endif // wxUSE_FONTMAP
// check for the special case of ASCII or ISO8859-1 charset: as we have
// special knowledge of it anyhow, we don't need to create a special
// conversion object
if ( m_encoding == wxFONTENCODING_ISO8859_1 ||
m_encoding == wxFONTENCODING_DEFAULT )
{
// don't convert at all
return NULL;
}
// we trust OS to do conversion better than we can so try external
// conversion methods first
//
// the full order is:
// 1. OS conversion (iconv() under Unix or Win32 API)
// 2. hard coded conversions for UTF
// 3. wxEncodingConverter as fall back
// step (1)
#ifdef HAVE_ICONV
#if !wxUSE_FONTMAP
if ( m_name )
#endif // !wxUSE_FONTMAP
{
#if wxUSE_FONTMAP
wxFontEncoding encoding(m_encoding);
#endif
if ( m_name )
{
wxMBConv_iconv *conv = new wxMBConv_iconv(m_name);
if ( conv->IsOk() )
return conv;
delete conv;
#if wxUSE_FONTMAP
encoding =
wxFontMapperBase::Get()->CharsetToEncoding(m_name, false);
#endif // wxUSE_FONTMAP
}
#if wxUSE_FONTMAP
{
const wxEncodingNameCache::iterator it = gs_nameCache.find(encoding);
if ( it != gs_nameCache.end() )
{
if ( it->second.empty() )
return NULL;
wxMBConv_iconv *conv = new wxMBConv_iconv(it->second.ToAscii());
if ( conv->IsOk() )
return conv;
delete conv;
}
const wxChar** names = wxFontMapperBase::GetAllEncodingNames(encoding);
// CS : in case this does not return valid names (eg for MacRoman)
// encoding got a 'failure' entry in the cache all the same,
// although it just has to be created using a different method, so
// only store failed iconv creation attempts (or perhaps we
// shoulnd't do this at all ?)
if ( names[0] != NULL )
{
for ( ; *names; ++names )
{
// FIXME-UTF8: wxFontMapperBase::GetAllEncodingNames()
// will need changes that will obsolete this
wxString name(*names);
wxMBConv_iconv *conv = new wxMBConv_iconv(name.ToAscii());
if ( conv->IsOk() )
{
gs_nameCache[encoding] = *names;
return conv;
}
delete conv;
}
gs_nameCache[encoding] = _T(""); // cache the failure
}
}
#endif // wxUSE_FONTMAP
}
#endif // HAVE_ICONV
#ifdef wxHAVE_WIN32_MB2WC
{
#if wxUSE_FONTMAP
wxMBConv_win32 *conv = m_name ? new wxMBConv_win32(m_name)
: new wxMBConv_win32(m_encoding);
if ( conv->IsOk() )
return conv;
delete conv;
#else
return NULL;
#endif
}
#endif // wxHAVE_WIN32_MB2WC
#ifdef __DARWIN__
{
// leave UTF16 and UTF32 to the built-ins of wx
if ( m_name || ( m_encoding < wxFONTENCODING_UTF16BE ||
( m_encoding >= wxFONTENCODING_MACMIN && m_encoding <= wxFONTENCODING_MACMAX ) ) )
{
#if wxUSE_FONTMAP
wxMBConv_cf *conv = m_name ? new wxMBConv_cf(m_name)
: new wxMBConv_cf(m_encoding);
#else
wxMBConv_cf *conv = new wxMBConv_cf(m_encoding);
#endif
if ( conv->IsOk() )
return conv;
delete conv;
}
}
#endif // __DARWIN__
// step (2)
wxFontEncoding enc = m_encoding;
#if wxUSE_FONTMAP
if ( enc == wxFONTENCODING_SYSTEM && m_name )
{
// use "false" to suppress interactive dialogs -- we can be called from
// anywhere and popping up a dialog from here is the last thing we want to
// do
enc = wxFontMapperBase::Get()->CharsetToEncoding(m_name, false);
}
#endif // wxUSE_FONTMAP
switch ( enc )
{
case wxFONTENCODING_UTF7:
return new wxMBConvUTF7;
case wxFONTENCODING_UTF8:
return new wxMBConvUTF8;
case wxFONTENCODING_UTF16BE:
return new wxMBConvUTF16BE;
case wxFONTENCODING_UTF16LE:
return new wxMBConvUTF16LE;
case wxFONTENCODING_UTF32BE:
return new wxMBConvUTF32BE;
case wxFONTENCODING_UTF32LE:
return new wxMBConvUTF32LE;
default:
// nothing to do but put here to suppress gcc warnings
break;
}
// step (3)
#if wxUSE_FONTMAP
{
wxMBConv_wxwin *conv = m_name ? new wxMBConv_wxwin(m_name)
: new wxMBConv_wxwin(m_encoding);
if ( conv->IsOk() )
return conv;
delete conv;
}
#endif // wxUSE_FONTMAP
// NB: This is a hack to prevent deadlock. What could otherwise happen
// in Unicode build: wxConvLocal creation ends up being here
// because of some failure and logs the error. But wxLog will try to
// attach a timestamp, for which it will need wxConvLocal (to convert
// time to char* and then wchar_t*), but that fails, tries to log the
// error, but wxLog has an (already locked) critical section that
// guards the static buffer.
static bool alreadyLoggingError = false;
if (!alreadyLoggingError)
{
alreadyLoggingError = true;
wxLogError(_("Cannot convert from the charset '%s'!"),
m_name ? m_name
:
#if wxUSE_FONTMAP
(const char*)wxFontMapperBase::GetEncodingDescription(m_encoding).ToAscii()
#else // !wxUSE_FONTMAP
(const char*)wxString::Format(_("encoding %i"), m_encoding).ToAscii()
#endif // wxUSE_FONTMAP/!wxUSE_FONTMAP
);
alreadyLoggingError = false;
}
return NULL;
}
void wxCSConv::CreateConvIfNeeded() const
{
if ( m_deferred )
{
wxCSConv *self = (wxCSConv *)this; // const_cast
// if we don't have neither the name nor the encoding, use the default
// encoding for this system
if ( !m_name && m_encoding == wxFONTENCODING_SYSTEM )
{
#if wxUSE_INTL
self->m_encoding = wxLocale::GetSystemEncoding();
#else
// fallback to some reasonable default:
self->m_encoding = wxFONTENCODING_ISO8859_1;
#endif // wxUSE_INTL
}
self->m_convReal = DoCreate();
self->m_deferred = false;
}
}
bool wxCSConv::IsOk() const
{
CreateConvIfNeeded();
// special case: no convReal created for wxFONTENCODING_ISO8859_1
if ( m_encoding == wxFONTENCODING_ISO8859_1 )
return true; // always ok as we do it ourselves
// m_convReal->IsOk() is called at its own creation, so we know it must
// be ok if m_convReal is non-NULL
return m_convReal != NULL;
}
size_t wxCSConv::ToWChar(wchar_t *dst, size_t dstLen,
const char *src, size_t srcLen) const
{
CreateConvIfNeeded();
if (m_convReal)
return m_convReal->ToWChar(dst, dstLen, src, srcLen);
// latin-1 (direct)
return wxMBConv::ToWChar(dst, dstLen, src, srcLen);
}
size_t wxCSConv::FromWChar(char *dst, size_t dstLen,
const wchar_t *src, size_t srcLen) const
{
CreateConvIfNeeded();
if (m_convReal)
return m_convReal->FromWChar(dst, dstLen, src, srcLen);
// latin-1 (direct)
return wxMBConv::FromWChar(dst, dstLen, src, srcLen);
}
size_t wxCSConv::MB2WC(wchar_t *buf, const char *psz, size_t n) const
{
CreateConvIfNeeded();
if (m_convReal)
return m_convReal->MB2WC(buf, psz, n);
// latin-1 (direct)
size_t len = strlen(psz);
if (buf)
{
for (size_t c = 0; c <= len; c++)
buf[c] = (unsigned char)(psz[c]);
}
return len;
}
size_t wxCSConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
{
CreateConvIfNeeded();
if (m_convReal)
return m_convReal->WC2MB(buf, psz, n);
// latin-1 (direct)
const size_t len = wxWcslen(psz);
if (buf)
{
for (size_t c = 0; c <= len; c++)
{
if (psz[c] > 0xFF)
return wxCONV_FAILED;
buf[c] = (char)psz[c];
}
}
else
{
for (size_t c = 0; c <= len; c++)
{
if (psz[c] > 0xFF)
return wxCONV_FAILED;
}
}
return len;
}
size_t wxCSConv::GetMBNulLen() const
{
CreateConvIfNeeded();
if ( m_convReal )
{
return m_convReal->GetMBNulLen();
}
// otherwise, we are ISO-8859-1
return 1;
}
#if wxUSE_UNICODE_UTF8
bool wxCSConv::IsUTF8() const
{
CreateConvIfNeeded();
if ( m_convReal )
{
return m_convReal->IsUTF8();
}
// otherwise, we are ISO-8859-1
return false;
}
#endif
#if wxUSE_UNICODE
wxWCharBuffer wxSafeConvertMB2WX(const char *s)
{
if ( !s )
return wxWCharBuffer();
wxWCharBuffer wbuf(wxConvLibc.cMB2WX(s));
if ( !wbuf )
wbuf = wxMBConvUTF8().cMB2WX(s);
if ( !wbuf )
wbuf = wxConvISO8859_1.cMB2WX(s);
return wbuf;
}
wxCharBuffer wxSafeConvertWX2MB(const wchar_t *ws)
{
if ( !ws )
return wxCharBuffer();
wxCharBuffer buf(wxConvLibc.cWX2MB(ws));
if ( !buf )
buf = wxMBConvUTF8(wxMBConvUTF8::MAP_INVALID_UTF8_TO_OCTAL).cWX2MB(ws);
return buf;
}
#endif // wxUSE_UNICODE
// ----------------------------------------------------------------------------
// globals
// ----------------------------------------------------------------------------
// NB: The reason why we create converted objects in this convoluted way,
// using a factory function instead of global variable, is that they
// may be used at static initialization time (some of them are used by
// wxString ctors and there may be a global wxString object). In other
// words, possibly _before_ the converter global object would be
// initialized.
#undef wxConvLibc
#undef wxConvUTF8
#undef wxConvUTF7
#undef wxConvLocal
#undef wxConvISO8859_1
#define WX_DEFINE_GLOBAL_CONV2(klass, impl_klass, name, ctor_args) \
WXDLLIMPEXP_DATA_BASE(klass*) name##Ptr = NULL; \
WXDLLIMPEXP_BASE klass* wxGet_##name##Ptr() \
{ \
static impl_klass name##Obj ctor_args; \
return &name##Obj; \
} \
/* this ensures that all global converter objects are created */ \
/* by the time static initialization is done, i.e. before any */ \
/* thread is launched: */ \
static klass* gs_##name##instance = wxGet_##name##Ptr()
#define WX_DEFINE_GLOBAL_CONV(klass, name, ctor_args) \
WX_DEFINE_GLOBAL_CONV2(klass, klass, name, ctor_args)
#ifdef __WINDOWS__
WX_DEFINE_GLOBAL_CONV2(wxMBConv, wxMBConv_win32, wxConvLibc, wxEMPTY_PARAMETER_VALUE);
#else
WX_DEFINE_GLOBAL_CONV2(wxMBConv, wxMBConvLibc, wxConvLibc, wxEMPTY_PARAMETER_VALUE);
#endif
// NB: we can't use wxEMPTY_PARAMETER_VALUE as final argument here because it's
// passed to WX_DEFINE_GLOBAL_CONV2 after a macro expansion and so still
// provokes an error message about "not enough macro parameters"; and we
// can't use "()" here as the name##Obj declaration would be parsed as a
// function declaration then, so use a semicolon and live with an extra
// empty statement (and hope that no compilers warns about this)
WX_DEFINE_GLOBAL_CONV(wxMBConvStrictUTF8, wxConvUTF8, ;);
WX_DEFINE_GLOBAL_CONV(wxMBConvUTF7, wxConvUTF7, ;);
WX_DEFINE_GLOBAL_CONV(wxCSConv, wxConvLocal, (wxFONTENCODING_SYSTEM));
WX_DEFINE_GLOBAL_CONV(wxCSConv, wxConvISO8859_1, (wxFONTENCODING_ISO8859_1));
WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvCurrent = wxGet_wxConvLibcPtr();
WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvUI = wxGet_wxConvLocalPtr();
#ifdef __DARWIN__
// The xnu kernel always communicates file paths in decomposed UTF-8.
// WARNING: Are we sure that CFString's conversion will cause decomposition?
static wxMBConv_cf wxConvMacUTF8DObj(wxFONTENCODING_UTF8);
#endif
WXDLLIMPEXP_DATA_BASE(wxMBConv *) wxConvFileName =
#ifdef __DARWIN__
&wxConvMacUTF8DObj;
#else // !__DARWIN__
wxGet_wxConvLibcPtr();
#endif // __DARWIN__/!__DARWIN__
#else // !wxUSE_WCHAR_T
// FIXME-UTF8: remove this, wxUSE_WCHAR_T is required now
// stand-ins in absence of wchar_t
WXDLLIMPEXP_DATA_BASE(wxMBConv) wxConvLibc,
wxConvISO8859_1,
wxConvLocal,
wxConvUTF8;
#endif // wxUSE_WCHAR_T/!wxUSE_WCHAR_T
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