780 lines
16 KiB
C++
780 lines
16 KiB
C++
/*
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* synergy -- mouse and keyboard sharing utility
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* Copyright (C) 2002 Chris Schoeneman
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*
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* This package is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* found in the file COPYING that should have accompanied this file.
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*
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* This package is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include "CUnicode.h"
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#include "CArch.h"
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#include <cstring>
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//
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// local utility functions
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//
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inline
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static
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UInt16
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decode16(const UInt8* n, bool byteSwapped)
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{
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union x16 {
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UInt8 n8[2];
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UInt16 n16;
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} c;
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if (byteSwapped) {
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c.n8[0] = n[1];
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c.n8[1] = n[0];
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}
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else {
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c.n8[0] = n[0];
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c.n8[1] = n[1];
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}
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return c.n16;
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}
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inline
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static
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UInt32
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decode32(const UInt8* n, bool byteSwapped)
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{
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union x32 {
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UInt8 n8[4];
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UInt32 n32;
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} c;
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if (byteSwapped) {
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c.n8[0] = n[3];
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c.n8[1] = n[2];
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c.n8[2] = n[1];
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c.n8[3] = n[0];
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}
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else {
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c.n8[0] = n[0];
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c.n8[1] = n[1];
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c.n8[2] = n[2];
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c.n8[3] = n[3];
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}
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return c.n32;
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}
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inline
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static
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void
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resetError(bool* errors)
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{
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if (errors != NULL) {
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*errors = false;
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}
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}
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inline
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static
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void
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setError(bool* errors)
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{
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if (errors != NULL) {
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*errors = true;
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}
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}
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//
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// CUnicode
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//
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UInt32 CUnicode::s_invalid = 0x0000ffff;
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UInt32 CUnicode::s_replacement = 0x0000fffd;
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bool
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CUnicode::isUTF8(const CString& src)
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{
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// convert and test each character
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const UInt8* data = reinterpret_cast<const UInt8*>(src.c_str());
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for (UInt32 n = src.size(); n > 0; ) {
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if (fromUTF8(data, n) == s_invalid) {
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return false;
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}
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}
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return true;
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}
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CString
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CUnicode::UTF8ToUCS2(const CString& src, bool* errors)
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{
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// default to success
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resetError(errors);
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// get size of input string and reserve some space in output
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UInt32 n = src.size();
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CString dst;
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dst.reserve(2 * n);
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// convert each character
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const UInt8* data = reinterpret_cast<const UInt8*>(src.c_str());
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while (n > 0) {
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UInt32 c = fromUTF8(data, n);
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if (c == s_invalid) {
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c = s_replacement;
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}
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else if (c >= 0x00010000) {
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setError(errors);
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c = s_replacement;
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}
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UInt16 ucs2 = static_cast<UInt16>(c);
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dst.append(reinterpret_cast<const char*>(&ucs2), 2);
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}
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return dst;
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}
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CString
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CUnicode::UTF8ToUCS4(const CString& src, bool* errors)
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{
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// default to success
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resetError(errors);
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// get size of input string and reserve some space in output
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UInt32 n = src.size();
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CString dst;
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dst.reserve(4 * n);
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// convert each character
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const UInt8* data = reinterpret_cast<const UInt8*>(src.c_str());
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while (n > 0) {
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UInt32 c = fromUTF8(data, n);
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if (c == s_invalid) {
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c = s_replacement;
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}
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dst.append(reinterpret_cast<const char*>(&c), 4);
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}
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return dst;
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}
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CString
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CUnicode::UTF8ToUTF16(const CString& src, bool* errors)
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{
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// default to success
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resetError(errors);
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// get size of input string and reserve some space in output
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UInt32 n = src.size();
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CString dst;
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dst.reserve(2 * n);
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// convert each character
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const UInt8* data = reinterpret_cast<const UInt8*>(src.c_str());
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while (n > 0) {
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UInt32 c = fromUTF8(data, n);
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if (c == s_invalid) {
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c = s_replacement;
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}
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else if (c >= 0x00110000) {
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setError(errors);
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c = s_replacement;
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}
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if (c < 0x00010000) {
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UInt16 ucs2 = static_cast<UInt16>(c);
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dst.append(reinterpret_cast<const char*>(&ucs2), 2);
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}
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else {
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c -= 0x00010000;
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UInt16 utf16h = static_cast<UInt16>((c >> 10) + 0xd800);
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UInt16 utf16l = static_cast<UInt16>((c & 0x03ff) + 0xdc00);
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dst.append(reinterpret_cast<const char*>(&utf16h), 2);
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dst.append(reinterpret_cast<const char*>(&utf16l), 2);
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}
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}
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return dst;
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}
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CString
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CUnicode::UTF8ToUTF32(const CString& src, bool* errors)
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{
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// default to success
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resetError(errors);
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// get size of input string and reserve some space in output
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UInt32 n = src.size();
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CString dst;
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dst.reserve(4 * n);
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// convert each character
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const UInt8* data = reinterpret_cast<const UInt8*>(src.c_str());
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while (n > 0) {
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UInt32 c = fromUTF8(data, n);
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if (c == s_invalid) {
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c = s_replacement;
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}
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else if (c >= 0x00110000) {
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setError(errors);
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c = s_replacement;
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}
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dst.append(reinterpret_cast<const char*>(&c), 4);
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}
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return dst;
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}
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CString
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CUnicode::UTF8ToText(const CString& src, bool* errors)
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{
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// default to success
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resetError(errors);
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// convert to wide char
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UInt32 size;
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wchar_t* tmp = UTF8ToWideChar(src, size, errors);
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// convert string to multibyte
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int len = ARCH->convStringWCToMB(NULL, tmp, size, errors);
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char* mbs = new char[len + 1];
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ARCH->convStringWCToMB(mbs, tmp, size, errors);
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CString text(mbs, len);
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// clean up
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delete[] mbs;
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delete[] tmp;
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return text;
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}
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CString
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CUnicode::UCS2ToUTF8(const CString& src, bool* errors)
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{
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// default to success
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resetError(errors);
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// convert
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UInt32 n = src.size() >> 1;
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return doUCS2ToUTF8(reinterpret_cast<const UInt8*>(src.data()), n, errors);
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}
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CString
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CUnicode::UCS4ToUTF8(const CString& src, bool* errors)
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{
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// default to success
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resetError(errors);
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// convert
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UInt32 n = src.size() >> 2;
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return doUCS4ToUTF8(reinterpret_cast<const UInt8*>(src.data()), n, errors);
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}
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CString
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CUnicode::UTF16ToUTF8(const CString& src, bool* errors)
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{
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// default to success
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resetError(errors);
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// convert
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UInt32 n = src.size() >> 1;
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return doUTF16ToUTF8(reinterpret_cast<const UInt8*>(src.data()), n, errors);
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}
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CString
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CUnicode::UTF32ToUTF8(const CString& src, bool* errors)
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{
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// default to success
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resetError(errors);
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// convert
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UInt32 n = src.size() >> 2;
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return doUTF32ToUTF8(reinterpret_cast<const UInt8*>(src.data()), n, errors);
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}
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CString
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CUnicode::textToUTF8(const CString& src, bool* errors)
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{
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// default to success
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resetError(errors);
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// convert string to wide characters
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UInt32 n = src.size();
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int len = ARCH->convStringMBToWC(NULL, src.c_str(), n, errors);
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wchar_t* wcs = new wchar_t[len + 1];
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ARCH->convStringMBToWC(wcs, src.c_str(), n, errors);
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// convert to UTF8
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CString utf8 = wideCharToUTF8(wcs, len, errors);
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// clean up
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delete[] wcs;
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return utf8;
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}
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wchar_t*
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CUnicode::UTF8ToWideChar(const CString& src, UInt32& size, bool* errors)
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{
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// convert to platform's wide character encoding
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CString tmp;
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switch (ARCH->getWideCharEncoding()) {
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case IArchString::kUCS2:
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tmp = UTF8ToUCS2(src, errors);
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size = tmp.size() >> 1;
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break;
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case IArchString::kUCS4:
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tmp = UTF8ToUCS4(src, errors);
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size = tmp.size() >> 2;
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break;
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case IArchString::kUTF16:
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tmp = UTF8ToUTF16(src, errors);
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size = tmp.size() >> 1;
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break;
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case IArchString::kUTF32:
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tmp = UTF8ToUTF32(src, errors);
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size = tmp.size() >> 2;
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break;
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default:
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assert(0 && "unknown wide character encoding");
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}
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// copy to a wchar_t array
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wchar_t* dst = new wchar_t[size];
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::memcpy(dst, tmp.data(), sizeof(wchar_t) * size);
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return dst;
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}
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CString
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CUnicode::wideCharToUTF8(const wchar_t* src, UInt32 size, bool* errors)
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{
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// convert from platform's wide character encoding.
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// note -- this must include a wide nul character (independent of
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// the CString's nul character).
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switch (ARCH->getWideCharEncoding()) {
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case IArchString::kUCS2:
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return doUCS2ToUTF8(reinterpret_cast<const UInt8*>(src), size, errors);
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case IArchString::kUCS4:
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return doUCS4ToUTF8(reinterpret_cast<const UInt8*>(src), size, errors);
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case IArchString::kUTF16:
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return doUTF16ToUTF8(reinterpret_cast<const UInt8*>(src), size, errors);
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case IArchString::kUTF32:
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return doUTF32ToUTF8(reinterpret_cast<const UInt8*>(src), size, errors);
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default:
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assert(0 && "unknown wide character encoding");
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return CString();
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}
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}
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CString
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CUnicode::doUCS2ToUTF8(const UInt8* data, UInt32 n, bool* errors)
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{
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// make some space
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CString dst;
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dst.reserve(n);
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// check if first character is 0xfffe or 0xfeff
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bool byteSwapped = false;
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if (n >= 1) {
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switch (decode16(data, false)) {
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case 0x0000feff:
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data += 2;
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--n;
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break;
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case 0x0000fffe:
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byteSwapped = true;
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data += 2;
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--n;
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break;
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default:
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break;
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}
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}
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// convert each character
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for (; n > 0; data += 2, --n) {
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UInt32 c = decode16(data, byteSwapped);
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toUTF8(dst, c, errors);
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}
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return dst;
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}
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CString
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CUnicode::doUCS4ToUTF8(const UInt8* data, UInt32 n, bool* errors)
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{
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// make some space
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CString dst;
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dst.reserve(n);
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// check if first character is 0xfffe or 0xfeff
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bool byteSwapped = false;
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if (n >= 1) {
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switch (decode32(data, false)) {
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case 0x0000feff:
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data += 4;
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--n;
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break;
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case 0x0000fffe:
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byteSwapped = true;
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data += 4;
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--n;
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break;
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default:
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break;
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}
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}
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// convert each character
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for (; n > 0; data += 4, --n) {
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UInt32 c = decode32(data, byteSwapped);
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toUTF8(dst, c, errors);
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}
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return dst;
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}
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CString
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CUnicode::doUTF16ToUTF8(const UInt8* data, UInt32 n, bool* errors)
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{
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// make some space
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CString dst;
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dst.reserve(n);
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// check if first character is 0xfffe or 0xfeff
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bool byteSwapped = false;
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if (n >= 1) {
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switch (decode16(data, false)) {
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case 0x0000feff:
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data += 2;
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--n;
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break;
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case 0x0000fffe:
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byteSwapped = true;
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data += 2;
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--n;
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break;
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default:
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break;
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}
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}
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// convert each character
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for (; n > 0; data += 2, --n) {
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UInt32 c = decode16(data, byteSwapped);
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if (c < 0x0000d800 || c > 0x0000dfff) {
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toUTF8(dst, c, errors);
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}
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else if (n == 1) {
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// error -- missing second word
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setError(errors);
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toUTF8(dst, s_replacement, NULL);
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}
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else if (c >= 0x0000d800 && c <= 0x0000dbff) {
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UInt32 c2 = decode16(data, byteSwapped);
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data += 2;
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--n;
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if (c2 < 0x0000dc00 || c2 > 0x0000dfff) {
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// error -- [d800,dbff] not followed by [dc00,dfff]
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setError(errors);
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toUTF8(dst, s_replacement, NULL);
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}
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else {
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c = (((c - 0x0000d800) << 10) | (c2 - 0x0000dc00)) + 0x00010000;
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toUTF8(dst, c, errors);
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}
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}
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else {
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// error -- [dc00,dfff] without leading [d800,dbff]
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setError(errors);
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toUTF8(dst, s_replacement, NULL);
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}
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}
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return dst;
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}
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CString
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CUnicode::doUTF32ToUTF8(const UInt8* data, UInt32 n, bool* errors)
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{
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// make some space
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CString dst;
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dst.reserve(n);
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// check if first character is 0xfffe or 0xfeff
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bool byteSwapped = false;
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if (n >= 1) {
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switch (decode32(data, false)) {
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case 0x0000feff:
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data += 4;
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--n;
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break;
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case 0x0000fffe:
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byteSwapped = true;
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data += 4;
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--n;
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break;
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default:
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break;
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}
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}
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// convert each character
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for (; n > 0; data += 4, --n) {
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UInt32 c = decode32(data, byteSwapped);
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if (c >= 0x00110000) {
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setError(errors);
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c = s_replacement;
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}
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toUTF8(dst, c, errors);
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}
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return dst;
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}
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UInt32
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CUnicode::fromUTF8(const UInt8*& data, UInt32& n)
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{
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assert(data != NULL);
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assert(n != 0);
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// compute character encoding length, checking for overlong
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// sequences (i.e. characters that don't use the shortest
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// possible encoding).
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UInt32 size;
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if (data[0] < 0x80) {
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// 0xxxxxxx
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size = 1;
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}
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else if (data[0] < 0xc0) {
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// 10xxxxxx -- in the middle of a multibyte character. counts
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// as one invalid character.
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--n;
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++data;
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return s_invalid;
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}
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else if (data[0] < 0xe0) {
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// 110xxxxx
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size = 2;
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}
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else if (data[0] < 0xf0) {
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// 1110xxxx
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size = 3;
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}
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else if (data[0] < 0xf8) {
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// 11110xxx
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size = 4;
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}
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else if (data[0] < 0xfc) {
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// 111110xx
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size = 5;
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}
|
|
else if (data[0] < 0xfe) {
|
|
// 1111110x
|
|
size = 6;
|
|
}
|
|
else {
|
|
// invalid sequence. dunno how many bytes to skip so skip one.
|
|
--n;
|
|
++data;
|
|
return s_invalid;
|
|
}
|
|
|
|
// make sure we have enough data
|
|
if (size > n) {
|
|
data += n;
|
|
n = 0;
|
|
return s_invalid;
|
|
}
|
|
|
|
// extract character
|
|
UInt32 c;
|
|
switch (size) {
|
|
case 1:
|
|
c = static_cast<UInt32>(data[0]);
|
|
break;
|
|
|
|
case 2:
|
|
c = ((static_cast<UInt32>(data[0]) & 0x1f) << 6) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) );
|
|
break;
|
|
|
|
case 3:
|
|
c = ((static_cast<UInt32>(data[0]) & 0x0f) << 12) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) << 6) |
|
|
((static_cast<UInt32>(data[2]) & 0x3f) );
|
|
break;
|
|
|
|
case 4:
|
|
c = ((static_cast<UInt32>(data[0]) & 0x07) << 18) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) << 12) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) << 6) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) );
|
|
break;
|
|
|
|
case 5:
|
|
c = ((static_cast<UInt32>(data[0]) & 0x03) << 24) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) << 18) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) << 12) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) << 6) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) );
|
|
break;
|
|
|
|
case 6:
|
|
c = ((static_cast<UInt32>(data[0]) & 0x01) << 30) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) << 24) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) << 18) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) << 12) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) << 6) |
|
|
((static_cast<UInt32>(data[1]) & 0x3f) );
|
|
break;
|
|
|
|
default:
|
|
assert(0 && "invalid size");
|
|
return s_invalid;
|
|
}
|
|
|
|
// check that all bytes after the first have the pattern 10xxxxxx.
|
|
// truncated sequences are treated as a single malformed character.
|
|
bool truncated = false;
|
|
switch (size) {
|
|
case 6:
|
|
if ((data[5] & 0xc0) != 0x80) {
|
|
truncated = true;
|
|
size = 5;
|
|
}
|
|
// fall through
|
|
|
|
case 5:
|
|
if ((data[4] & 0xc0) != 0x80) {
|
|
truncated = true;
|
|
size = 4;
|
|
}
|
|
// fall through
|
|
|
|
case 4:
|
|
if ((data[3] & 0xc0) != 0x80) {
|
|
truncated = true;
|
|
size = 3;
|
|
}
|
|
// fall through
|
|
|
|
case 3:
|
|
if ((data[2] & 0xc0) != 0x80) {
|
|
truncated = true;
|
|
size = 2;
|
|
}
|
|
// fall through
|
|
|
|
case 2:
|
|
if ((data[1] & 0xc0) != 0x80) {
|
|
truncated = true;
|
|
size = 1;
|
|
}
|
|
}
|
|
|
|
// update parameters
|
|
data += size;
|
|
n -= size;
|
|
|
|
// invalid if sequence was truncated
|
|
if (truncated) {
|
|
return s_invalid;
|
|
}
|
|
|
|
// check for characters that didn't use the smallest possible encoding
|
|
static UInt32 s_minChar[] = {
|
|
0,
|
|
0x00000000,
|
|
0x00000080,
|
|
0x00000800,
|
|
0x00010000,
|
|
0x00200000,
|
|
0x04000000
|
|
};
|
|
if (c < s_minChar[size]) {
|
|
return s_invalid;
|
|
}
|
|
|
|
// check for characters not in ISO-10646
|
|
if (c >= 0x0000d800 && c <= 0x0000dfff) {
|
|
return s_invalid;
|
|
}
|
|
if (c >= 0x0000fffe && c <= 0x0000ffff) {
|
|
return s_invalid;
|
|
}
|
|
|
|
return c;
|
|
}
|
|
|
|
void
|
|
CUnicode::toUTF8(CString& dst, UInt32 c, bool* errors)
|
|
{
|
|
UInt8 data[6];
|
|
|
|
// handle characters outside the valid range
|
|
if ((c >= 0x0000d800 && c <= 0x0000dfff) || c >= 0x80000000) {
|
|
setError(errors);
|
|
c = s_replacement;
|
|
}
|
|
|
|
// convert to UTF-8
|
|
if (c < 0x00000080) {
|
|
data[0] = static_cast<UInt8>(c);
|
|
dst.append(reinterpret_cast<char*>(data), 1);
|
|
}
|
|
else if (c < 0x00000800) {
|
|
data[0] = static_cast<UInt8>(((c >> 6) & 0x0000001f) + 0xc0);
|
|
data[1] = static_cast<UInt8>((c & 0x0000003f) + 0x80);
|
|
dst.append(reinterpret_cast<char*>(data), 2);
|
|
}
|
|
else if (c < 0x00010000) {
|
|
data[0] = static_cast<UInt8>(((c >> 12) & 0x0000000f) + 0xe0);
|
|
data[1] = static_cast<UInt8>(((c >> 6) & 0x0000003f) + 0x80);
|
|
data[2] = static_cast<UInt8>((c & 0x0000003f) + 0x80);
|
|
dst.append(reinterpret_cast<char*>(data), 3);
|
|
}
|
|
else if (c < 0x00200000) {
|
|
data[0] = static_cast<UInt8>(((c >> 18) & 0x00000007) + 0xf0);
|
|
data[1] = static_cast<UInt8>(((c >> 12) & 0x0000003f) + 0x80);
|
|
data[2] = static_cast<UInt8>(((c >> 6) & 0x0000003f) + 0x80);
|
|
data[3] = static_cast<UInt8>((c & 0x0000003f) + 0x80);
|
|
dst.append(reinterpret_cast<char*>(data), 4);
|
|
}
|
|
else if (c < 0x04000000) {
|
|
data[0] = static_cast<UInt8>(((c >> 24) & 0x00000003) + 0xf8);
|
|
data[1] = static_cast<UInt8>(((c >> 18) & 0x0000003f) + 0x80);
|
|
data[2] = static_cast<UInt8>(((c >> 12) & 0x0000003f) + 0x80);
|
|
data[3] = static_cast<UInt8>(((c >> 6) & 0x0000003f) + 0x80);
|
|
data[4] = static_cast<UInt8>((c & 0x0000003f) + 0x80);
|
|
dst.append(reinterpret_cast<char*>(data), 5);
|
|
}
|
|
else if (c < 0x80000000) {
|
|
data[0] = static_cast<UInt8>(((c >> 30) & 0x00000001) + 0xfc);
|
|
data[1] = static_cast<UInt8>(((c >> 24) & 0x0000003f) + 0x80);
|
|
data[2] = static_cast<UInt8>(((c >> 18) & 0x0000003f) + 0x80);
|
|
data[3] = static_cast<UInt8>(((c >> 12) & 0x0000003f) + 0x80);
|
|
data[4] = static_cast<UInt8>(((c >> 6) & 0x0000003f) + 0x80);
|
|
data[5] = static_cast<UInt8>((c & 0x0000003f) + 0x80);
|
|
dst.append(reinterpret_cast<char*>(data), 6);
|
|
}
|
|
else {
|
|
assert(0 && "character out of range");
|
|
}
|
|
}
|