| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
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| ** |
| ** This file is part of the QtCore module of the Qt Toolkit. |
| ** |
| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
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| ****************************************************************************/ |
| |
| #include "qwindowscodec_p.h" |
| #include <qvarlengtharray.h> |
| #include <qstring.h> |
| #include <qbytearray.h> |
| #include <qt_windows.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| QWindowsLocalCodec::QWindowsLocalCodec() |
| { |
| } |
| |
| QWindowsLocalCodec::~QWindowsLocalCodec() |
| { |
| } |
| |
| QString QWindowsLocalCodec::convertToUnicode(const char *chars, int length, ConverterState *state) const |
| { |
| const char *mb = chars; |
| int mblen = length; |
| |
| if (!mb || !mblen) |
| return QString(); |
| |
| QVarLengthArray<wchar_t, 4096> wc(4096); |
| int len; |
| QString sp; |
| bool prepend = false; |
| char state_data = 0; |
| int remainingChars = 0; |
| |
| //save the current state information |
| if (state) { |
| state_data = (char)state->state_data[0]; |
| remainingChars = state->remainingChars; |
| } |
| |
| //convert the pending charcter (if available) |
| if (state && remainingChars) { |
| char prev[3] = {0}; |
| prev[0] = state_data; |
| prev[1] = mb[0]; |
| remainingChars = 0; |
| len = MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, |
| prev, 2, wc.data(), wc.length()); |
| if (len) { |
| sp.append(QChar(wc[0])); |
| if (mblen == 1) { |
| state->remainingChars = 0; |
| return sp; |
| } |
| prepend = true; |
| mb++; |
| mblen--; |
| wc[0] = 0; |
| } |
| } |
| |
| while (!(len=MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED|MB_ERR_INVALID_CHARS, |
| mb, mblen, wc.data(), wc.length()))) { |
| int r = GetLastError(); |
| if (r == ERROR_INSUFFICIENT_BUFFER) { |
| const int wclen = MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, |
| mb, mblen, 0, 0); |
| wc.resize(wclen); |
| } else if (r == ERROR_NO_UNICODE_TRANSLATION) { |
| //find the last non NULL character |
| while (mblen > 1 && !(mb[mblen-1])) |
| mblen--; |
| //check whether, we hit an invalid character in the middle |
| if ((mblen <= 1) || (remainingChars && state_data)) |
| return convertToUnicodeCharByChar(chars, length, state); |
| //Remove the last character and try again... |
| state_data = mb[mblen-1]; |
| remainingChars = 1; |
| mblen--; |
| } else { |
| // Fail. |
| qWarning("MultiByteToWideChar: Cannot convert multibyte text"); |
| break; |
| } |
| } |
| |
| if (len <= 0) |
| return QString(); |
| |
| if (wc[len-1] == 0) // len - 1: we don't want terminator |
| --len; |
| |
| //save the new state information |
| if (state) { |
| state->state_data[0] = (char)state_data; |
| state->remainingChars = remainingChars; |
| } |
| QString s((QChar*)wc.data(), len); |
| if (prepend) { |
| return sp+s; |
| } |
| return s; |
| } |
| |
| QString QWindowsLocalCodec::convertToUnicodeCharByChar(const char *chars, int length, ConverterState *state) const |
| { |
| if (!chars || !length) |
| return QString(); |
| |
| int copyLocation = 0; |
| int extra = 2; |
| if (state && state->remainingChars) { |
| copyLocation = state->remainingChars; |
| extra += copyLocation; |
| } |
| int newLength = length + extra; |
| char *mbcs = new char[newLength]; |
| //ensure that we have a NULL terminated string |
| mbcs[newLength-1] = 0; |
| mbcs[newLength-2] = 0; |
| memcpy(&(mbcs[copyLocation]), chars, length); |
| if (copyLocation) { |
| //copy the last character from the state |
| mbcs[0] = (char)state->state_data[0]; |
| state->remainingChars = 0; |
| } |
| const char *mb = mbcs; |
| #if !defined(Q_OS_WINRT) |
| const char *next = 0; |
| QString s; |
| while ((next = CharNextExA(CP_ACP, mb, 0)) != mb) { |
| wchar_t wc[2] ={0}; |
| int charlength = next - mb; |
| int len = MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED|MB_ERR_INVALID_CHARS, mb, charlength, wc, 2); |
| if (len>0) { |
| s.append(QChar(wc[0])); |
| } else { |
| int r = GetLastError(); |
| //check if the character being dropped is the last character |
| if (r == ERROR_NO_UNICODE_TRANSLATION && mb == (mbcs+newLength -3) && state) { |
| state->remainingChars = 1; |
| state->state_data[0] = (char)*mb; |
| } |
| } |
| mb = next; |
| } |
| #else |
| QString s; |
| size_t size = mbstowcs(NULL, mb, length); |
| if (size == size_t(-1)) { |
| Q_ASSERT("Error in CE TextCodec"); |
| return QString(); |
| } |
| wchar_t* ws = new wchar_t[size + 2]; |
| ws[size +1] = 0; |
| ws[size] = 0; |
| size = mbstowcs(ws, mb, length); |
| for (size_t i = 0; i < size; i++) |
| s.append(QChar(ws[i])); |
| delete [] ws; |
| #endif |
| delete [] mbcs; |
| return s; |
| } |
| |
| QByteArray QWindowsLocalCodec::convertFromUnicode(const QChar *ch, int uclen, ConverterState *) const |
| { |
| if (!ch) |
| return QByteArray(); |
| if (uclen == 0) |
| return QByteArray(""); |
| BOOL used_def; |
| QByteArray mb(4096, 0); |
| int len; |
| while (!(len=WideCharToMultiByte(CP_ACP, 0, (const wchar_t*)ch, uclen, |
| mb.data(), mb.size()-1, 0, &used_def))) |
| { |
| int r = GetLastError(); |
| if (r == ERROR_INSUFFICIENT_BUFFER) { |
| mb.resize(1+WideCharToMultiByte(CP_ACP, 0, |
| (const wchar_t*)ch, uclen, |
| 0, 0, 0, &used_def)); |
| // and try again... |
| } else { |
| // Fail. Probably can't happen in fact (dwFlags is 0). |
| #ifndef QT_NO_DEBUG |
| // Can't use qWarning(), as it'll recurse to handle %ls |
| fprintf(stderr, |
| "WideCharToMultiByte: Cannot convert multibyte text (error %d): %ls\n", |
| r, reinterpret_cast<const wchar_t*>(QString(ch, uclen).utf16())); |
| #endif |
| break; |
| } |
| } |
| mb.resize(len); |
| return mb; |
| } |
| |
| |
| QByteArray QWindowsLocalCodec::name() const |
| { |
| return "System"; |
| } |
| |
| int QWindowsLocalCodec::mibEnum() const |
| { |
| return 0; |
| } |
| |
| QT_END_NAMESPACE |