return buf;
}
-const wxWCharBuffer wxMBConv::cMB2WC(const char *szString, size_t nStringLen, size_t* pOutSize) const
+const wxWCharBuffer
+wxMBConv::cMB2WC(const char *in, size_t inLen, size_t *outLen) const
{
- wxASSERT(pOutSize != NULL);
+ // the currently accumulated wide characters
+ wxWCharBuffer wbuf;
- const char* szEnd = szString + nStringLen + 1;
- const char* szPos = szString;
- const char* szStart = szPos;
+ // the current length of wbuf
+ size_t lenBuf = 0;
- size_t nActualLength = 0;
- size_t nCurrentSize = nStringLen; //try normal size first (should never resize?)
+ // we need to know the representation of L'\0' for this conversion
+ size_t nulLen;
+ const char * const nul = GetMBNul(&nulLen);
+ if ( nulLen == (size_t)-1 || nulLen == 0 )
+ return wxWCharBuffer();
- wxWCharBuffer theBuffer(nCurrentSize);
+ // make a copy of the input string unless it is already properly
+ // NUL-terminated
+ wxCharBuffer bufTmp;
- //Convert the string until the length() is reached, continuing the
- //loop every time a null character is reached
- while(szPos != szEnd)
+ // now we can compute the input size if we were not given it: notice that
+ // in this case the string must be properly NUL-terminated, of course, as
+ // otherwise we have no way of knowing how long it is
+ if ( inLen == (size_t)-1 )
{
- wxASSERT(szPos < szEnd); //something is _really_ screwed up if this rings true
+ // not the most efficient algorithm but it shouldn't matter as normally
+ // there are not many NULs in the string and so normally memcmp()
+ // should stop on the first character
+ const char *p = in;
+ while ( memcmp(p, nul, nulLen) != 0 )
+ p++;
- //Get the length of the current (sub)string
- size_t nLen = MB2WC(NULL, szPos, 0);
-
- //Invalid conversion?
- if( nLen == (size_t)-1 )
+ inLen = p - in + nulLen;
+ }
+ else // we already have the size
+ {
+ // check if it's not already NUL-terminated too to avoid the copy
+ if ( inLen < nulLen || memcmp(in + inLen - nulLen, nul, nulLen) != 0 )
{
- *pOutSize = 0;
- theBuffer.data()[0u] = wxT('\0');
- return theBuffer;
+ // make a copy in order to properly NUL-terminate the string
+ bufTmp = wxCharBuffer(inLen + nulLen - 1 /* 1 will be added */);
+ memcpy(bufTmp.data(), in, inLen);
+ memcpy(bufTmp.data() + inLen, nul, nulLen);
}
+ }
+ if ( bufTmp )
+ in = bufTmp;
- //Increase the actual length (+1 for current null character)
- nActualLength += nLen + 1;
-
- //if buffer too big, realloc the buffer
- if (nActualLength > (nCurrentSize+1))
+ for ( const char * const inEnd = in + inLen;; )
+ {
+ // try to convert the current chunk if anything left
+ size_t lenChunk = in < inEnd ? MB2WC(NULL, in, 0) : 0;
+ if ( lenChunk == 0 )
{
- wxWCharBuffer theNewBuffer(nCurrentSize << 1);
- memcpy(theNewBuffer.data(), theBuffer.data(), nCurrentSize * sizeof(wchar_t));
- theBuffer = theNewBuffer;
- nCurrentSize <<= 1;
- }
+ // nothing left in the input string, conversion succeeded
+ if ( outLen )
+ {
+ // we shouldn't include the last NUL in the result length
+ *outLen = lenBuf ? lenBuf - 1 : 0;
+ }
- //Convert the current (sub)string
- if ( MB2WC(&theBuffer.data()[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
- {
- *pOutSize = 0;
- theBuffer.data()[0u] = wxT('\0');
- return theBuffer;
+ return wbuf;
}
- //Increment to next (sub)string
- //Note that we have to use strlen instead of nLen here
- //because XX2XX gives us the size of the output buffer,
- //which is not necessarily the length of the string
- szPos += strlen(szPos) + 1;
+ if ( lenChunk == (size_t)-1 )
+ break;
+
+ const size_t lenBufNew = lenBuf + lenChunk;
+ if ( !wbuf.extend(lenBufNew) )
+ break;
+
+ lenChunk = MB2WC(wbuf.data() + lenBuf, in, lenChunk + 1 /* for NUL */);
+ if ( lenChunk == (size_t)-1 )
+ break;
+
+ // +! for the embedded NUL (if something follows)
+ lenBuf = lenBufNew + 1;
+
+ // advance the input pointer past the end of this chunk
+ while ( memcmp(in, nul, nulLen) != 0 )
+ in++;
+
+ in += nulLen; // skipping over its terminator as well
}
- //success - return actual length and the buffer
- *pOutSize = nActualLength;
- return theBuffer;
+ // conversion failed
+ if ( outLen )
+ *outLen = 0;
+
+ return wxWCharBuffer();
}
-const wxCharBuffer wxMBConv::cWC2MB(const wchar_t *szString, size_t nStringLen, size_t* pOutSize) const
+const wxCharBuffer
+wxMBConv::cWC2MB(const wchar_t *in, size_t inLen, size_t *outLen) const
{
- wxASSERT(pOutSize != NULL);
-
- const wchar_t* szEnd = szString + nStringLen + 1;
- const wchar_t* szPos = szString;
- const wchar_t* szStart = szPos;
-
- size_t nActualLength = 0;
- size_t nCurrentSize = nStringLen << 2; //try * 4 first
+ // the currently accumulated multibyte characters
+ wxCharBuffer buf;
- wxCharBuffer theBuffer(nCurrentSize);
+ // the current length of buf
+ size_t lenBuf = 0;
- //Convert the string until the length() is reached, continuing the
- //loop every time a null character is reached
- while(szPos != szEnd)
+ // 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 ( inLen == (size_t)-1 )
+ {
+ inLen = wxWcslen(in) + 1;
+ }
+ else if ( inLen != 0 && in[inLen - 1] != L'\0' )
{
- wxASSERT(szPos < szEnd); //something is _really_ screwed up if this rings true
+ // make a copy in order to properly NUL-terminate the string
+ bufTmp = wxWCharBuffer(inLen);
+ memcpy(bufTmp.data(), in, inLen*sizeof(wchar_t));
+ }
- //Get the length of the current (sub)string
- size_t nLen = WC2MB(NULL, szPos, 0);
+ if ( bufTmp )
+ in = bufTmp;
- //Invalid conversion?
- if( nLen == (size_t)-1 )
+ for ( const wchar_t * const inEnd = in + inLen;; )
+ {
+ // try to convert the current chunk, if anything left
+ size_t lenChunk = in < inEnd ? WC2MB(NULL, in, 0) : 0;
+ if ( lenChunk == 0 )
{
- *pOutSize = 0;
- theBuffer.data()[0u] = wxT('\0');
- return theBuffer;
+ // nothing left in the input string, conversion succeeded
+ if ( outLen )
+ *outLen = lenBuf ? lenBuf - 1 : lenBuf;
+
+ return buf;
}
- //Increase the actual length (+1 for current null character)
- nActualLength += nLen + 1;
+ if ( lenChunk == (size_t)-1 )
+ break;
- //if buffer too big, realloc the buffer
- if (nActualLength > (nCurrentSize+1))
- {
- wxCharBuffer theNewBuffer(nCurrentSize << 1);
- memcpy(theNewBuffer.data(), theBuffer.data(), nCurrentSize);
- theBuffer = theNewBuffer;
- nCurrentSize <<= 1;
- }
+ const size_t lenBufNew = lenBuf + lenChunk;
+ if ( !buf.extend(lenBufNew) )
+ break;
- //Convert the current (sub)string
- if(WC2MB(&theBuffer.data()[szPos - szStart], szPos, nLen + 1) == (size_t)-1 )
- {
- *pOutSize = 0;
- theBuffer.data()[0u] = wxT('\0');
- return theBuffer;
- }
+ lenChunk = WC2MB(buf.data() + lenBuf, in, lenChunk + 1 /* for NUL */);
+ if ( lenChunk == (size_t)-1 )
+ break;
- //Increment to next (sub)string
- //Note that we have to use wxWcslen instead of nLen here
- //because XX2XX gives us the size of the output buffer,
- //which is not necessarily the length of the string
- szPos += wxWcslen(szPos) + 1;
+ // chunk successfully converted, go to the next one
+ in += wxWcslen(in) + 1 /* skip NUL too */;
+ lenBuf = lenBufNew + 1;
}
- //success - return actual length and the buffer
- *pOutSize = nActualLength;
- return theBuffer;
+ // conversion failed
+ if ( outLen )
+ *outLen = 0;
+
+ return wxCharBuffer();
}
// ----------------------------------------------------------------------------
return wxWC2MB(buf, psz, n);
}
-#ifdef __UNIX__
-
// ----------------------------------------------------------------------------
// wxConvBrokenFileNames
// ----------------------------------------------------------------------------
+#ifdef __UNIX__
+
wxConvBrokenFileNames::wxConvBrokenFileNames(const wxChar *charset)
{
if ( !charset || wxStricmp(charset, _T("UTF-8")) == 0
m_conv = new wxCSConv(charset);
}
-size_t
-wxConvBrokenFileNames::MB2WC(wchar_t *outputBuf,
- const char *psz,
- size_t outputSize) const
-{
- return m_conv->MB2WC( outputBuf, psz, outputSize );
-}
-
-size_t
-wxConvBrokenFileNames::WC2MB(char *outputBuf,
- const wchar_t *psz,
- size_t outputSize) const
-{
- return m_conv->WC2MB( outputBuf, psz, outputSize );
-}
-
-#endif
+#endif // __UNIX__
// ----------------------------------------------------------------------------
// UTF-7
size_t wxMBConvUTF7::WC2MB(char *buf, const wchar_t *psz, size_t n) const
{
-
-
size_t len = 0;
while (*psz && ((!buf) || (len < n)))
// swap 16bit MB to 16bit String
size_t wxMBConvUTF16swap::WC2MB(char *buf, const wchar_t *psz, size_t n) const
{
- size_t len=0;
+ size_t len = 0;
- while (*psz && (!buf || len < n))
+ while ( *psz && (!buf || len < n) )
{
- if (buf)
+ if ( buf )
{
*buf++ = ((char*)psz)[1];
*buf++ = ((char*)psz)[0];
}
- len += sizeof(wxUint16);
+ len += 2;
psz++;
}
- if (buf && len<=n-sizeof(wxUint16)) *(wxUint16*)buf=0;
+
+ if ( buf && len < n )
+ *buf = '\0';
return len;
}
#endif
private:
+ virtual const char *GetMBNul(size_t *nulLen) const;
+
// 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;
+
+ // NUL representation
+ size_t m_nulLen;
+ char m_nulBuf[8];
};
// make the constructor available for unit testing
wxMBConv_iconv::wxMBConv_iconv(const wxChar *name)
{
+ m_nulLen = (size_t)-2;
+
// iconv operates with chars, not wxChars, but luckily it uses only ASCII
// names for the charsets
const wxCharBuffer cname(wxString(name).ToAscii());
return res;
}
+const char *wxMBConv_iconv::GetMBNul(size_t *nulLen) const
+{
+ if ( m_nulLen == (size_t)-2 )
+ {
+ wxMBConv_iconv * const self = wxConstCast(this, wxMBConv_iconv);
+
+#if wxUSE_THREADS
+ // NB: explained in MB2WC
+ wxMutexLocker lock(self->m_iconvMutex);
+#endif
+
+ wchar_t *wnul = L"";
+ size_t inLen = sizeof(wchar_t),
+ outLen = WXSIZEOF(m_nulBuf);
+ const char *in = (char *)wnul;
+ char *out = self->m_nulBuf;
+ if ( iconv(w2m, &in, &inLen, &out, &outLen) == (size_t)-1 )
+ {
+ self->m_nulLen = (size_t)-1;
+ }
+ else // ok
+ {
+ self->m_nulLen = out - m_nulBuf;
+ }
+ }
+
+ *nulLen = m_nulLen;
+ return m_nulBuf;
+}
+
#endif // HAVE_ICONV
wxMBConv_win32()
{
m_CodePage = CP_ACP;
+ m_nulLen = (size_t)-2;
}
#if wxUSE_FONTMAP
wxMBConv_win32(const wxChar* name)
{
m_CodePage = wxCharsetToCodepage(name);
+ m_nulLen = (size_t)-2;
}
wxMBConv_win32(wxFontEncoding encoding)
{
m_CodePage = wxEncodingToCodepage(encoding);
+ m_nulLen = (size_t)-2;
}
-#endif
+#endif // wxUSE_FONTMAP
size_t MB2WC(wchar_t *buf, const char *psz, size_t n) const
{
#endif
}
+ virtual const char *GetMBNul(size_t *nulLen) const
+ {
+ if ( m_nulLen == (size_t)-2 )
+ {
+ wxMBConv_win32 * const self = wxConstCast(this, wxMBConv_win32);
+
+ self->m_nulLen = ::WideCharToMultiByte
+ (
+ m_CodePage, // code page
+ 0, // no flags
+ L"", // input string
+ 1, // translate just NUL
+ self->m_nulBuf, // output buffer
+ WXSIZEOF(m_nulBuf), // and its size
+ NULL, // "replacement" char
+ NULL // [out] was it used?
+ );
+
+ if ( m_nulLen == 0 )
+ self->m_nulLen = (size_t)-1;
+ }
+
+ *nulLen = m_nulLen;
+ return m_nulBuf;
+ }
+
long m_CodePage;
+ size_t m_nulLen;
+ char m_nulBuf[8];
};
#endif // wxHAVE_WIN32_MB2WC
wxFontEncoding m_enc;
wxEncodingConverter m2w, w2m;
+private:
+ virtual const char *GetMBNul(size_t *nulLen) const
+ {
+ switch ( m_enc )
+ {
+ case wxFONTENCODING_UTF16BE:
+ case wxFONTENCODING_UTF16LE:
+ *nulLen = 2;
+ return "\0";
+
+ case wxFONTENCODING_UTF32BE:
+ case wxFONTENCODING_UTF32LE:
+ *nulLen = 4;
+ return "\0\0\0";
+
+ default:
+ *nulLen = 1;
+ return "";
+ }
+ }
+
// were we initialized successfully?
bool m_ok;
return len;
}
+const char *wxCSConv::GetMBNul(size_t *nulLen) const
+{
+ CreateConvIfNeeded();
+
+ if ( m_convReal )
+ {
+ // cast needed just to call private function of m_convReal
+ return ((wxCSConv *)m_convReal)->GetMBNul(nulLen);
+ }
+
+ *nulLen = 1;
+ return "";
+}
+
// ----------------------------------------------------------------------------
// globals
// ----------------------------------------------------------------------------
projects / wxWidgets.git / blobdiff