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https://git.lyx.org/repos/lyx.git
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Cleanup and speedup some of the conversion functions a bit.
git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@14966 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Lars Gullik Bjønnes
parent
4b7fe14620
commit
8fd2299744
@ -27,6 +27,14 @@ using std::string;
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namespace {
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#ifdef WORDS_BIGENDIAN
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char const * ucs4_codeset = "UCS-4BE";
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char const * ucs2_codeset = "UCS-2BE";
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#else
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char const * ucs4_codeset = "UCS-4LE";
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char const * ucs2_codeset = "UCS-2LE";
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#endif
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std::vector<char>
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iconv_convert(std::string const & tocode, std::string const & fromcode,
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std::vector<char> const & buf)
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@ -111,80 +119,15 @@ iconv_convert(std::string const & tocode, std::string const & fromcode,
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std::vector<boost::uint32_t> bytes_to_ucs4(std::vector<char> const & bytes)
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{
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//lyxerr << "Outbuf =" << std::hex;
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std::vector<boost::uint32_t> ucs4;
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for (size_t i = 0; i < bytes.size(); i += 4) {
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unsigned char const b1 = bytes[i ];
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unsigned char const b2 = bytes[i + 1];
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unsigned char const b3 = bytes[i + 2];
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unsigned char const b4 = bytes[i + 3];
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boost::uint32_t c;
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char * cc = reinterpret_cast<char *>(&c);
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#ifdef WORDS_BIGENDIAN
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cc[0] = b1;
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cc[1] = b2;
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cc[2] = b3;
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cc[3] = b4;
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#else
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cc[3] = b1;
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cc[2] = b2;
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cc[1] = b3;
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cc[0] = b4;
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#endif
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if (c > 0xffff) {
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lyxerr << "Strange ucs4 value encountered\n";
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lyxerr << "0x"
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<< std::setw(2) << std::setfill('0') << int(b1)
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<< std::setw(2) << std::setfill('0') << int(b2)
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<< std::setw(2) << std::setfill('0') << int(b3)
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<< std::setw(2) << std::setfill('0') << int(b4)
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<< ' '
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<< "(0x"
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<< c
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<< ") ";
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}
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ucs4.push_back(c);
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}
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//lyxerr << endl;
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return ucs4;
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boost::uint32_t const * tmp = reinterpret_cast<uint32_t const *>(&bytes[0]);
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return std::vector<boost::uint32_t>(tmp, tmp + bytes.size() / 4);
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}
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std::vector<unsigned short> bytes_to_ucs2(std::vector<char> const & bytes)
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{
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//lyxerr << "Outbuf =" << std::hex;
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std::vector<unsigned short> ucs2;
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for (size_t i = 0; i < bytes.size(); i += 2) {
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unsigned char const b1 = bytes[i ];
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unsigned char const b2 = bytes[i + 1];
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unsigned short c;
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char * cc = reinterpret_cast<char *>(&c);
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#ifdef WORDS_BIGENDIAN
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cc[0] = b1;
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cc[1] = b2;
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#else
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cc[1] = b1;
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cc[0] = b2;
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#endif
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//lyxerr << "0x"
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// << std::setw(2) << std::setfill('0') << int(b2)
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// << std::setw(2) << std::setfill('0') << int(b1)
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// << ' '
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// << "(0x"
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// << c
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// << ") ";
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ucs2.push_back(c);
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}
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//lyxerr << endl;
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return ucs2;
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unsigned short const * tmp = reinterpret_cast<unsigned short const *>(&bytes[0]);
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return std::vector<unsigned short>(tmp, tmp + bytes.size() / 2);
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}
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} // anon namespace
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@ -197,7 +140,7 @@ std::vector<boost::uint32_t> utf8_to_ucs4(std::vector<char> const & utf8str)
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//lyxerr << "Res = " << string(res.begin(), res.end())
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// << " (" << res.size() << ")" << endl;
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std::vector<char> res = iconv_convert("UCS-4BE", "UTF-8", utf8str);
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std::vector<char> res = iconv_convert(ucs4_codeset, "UTF-8", utf8str);
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return bytes_to_ucs4(res);
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}
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@ -205,20 +148,9 @@ std::vector<boost::uint32_t> utf8_to_ucs4(std::vector<char> const & utf8str)
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std::vector<boost::uint32_t>
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ucs2_to_ucs4(std::vector<unsigned short> const & ucs2str)
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{
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// TODO: Simplify and speed up.
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std::vector<char> in;
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std::vector<unsigned short>::const_iterator cit = ucs2str.begin();
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std::vector<unsigned short>::const_iterator end = ucs2str.end();
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//lyxerr << std::hex;
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for (; cit != end; ++cit) {
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unsigned short s = *cit;
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in.push_back(static_cast<char>((s & 0xff00) >> 8));
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in.push_back(static_cast<char>(s & 0x00ff));
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lyxerr << std::setw(2) << std::setfill('0') << ((s & 0xff00) >> 8) << endl;
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lyxerr << std::setw(2) << std::setfill('0') << (s & 0x00ff) << endl;
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}
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std::vector<char> res = iconv_convert("UCS-4BE", "UCS-2BE", in);
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char const * tin = reinterpret_cast<char const *>(&ucs2str[0]);
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std::vector<char> in(tin, tin + ucs2str.size() * 2);
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std::vector<char> res = iconv_convert(ucs4_codeset, ucs2_codeset, in);
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return bytes_to_ucs4(res);
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}
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@ -226,17 +158,9 @@ ucs2_to_ucs4(std::vector<unsigned short> const & ucs2str)
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std::vector<unsigned short>
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ucs4_to_ucs2(std::vector<boost::uint32_t> const & ucs4str)
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{
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std::vector<char> in;
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std::vector<boost::uint32_t>::const_iterator cit = ucs4str.begin();
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std::vector<boost::uint32_t>::const_iterator end = ucs4str.end();
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for (; cit != end; ++cit) {
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boost::uint32_t s = *cit;
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in.push_back(static_cast<char>((s & 0xff000000) >> 24));
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in.push_back(static_cast<char>((s & 0x00ff0000) >> 16));
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in.push_back(static_cast<char>((s & 0x0000ff00) >> 8));
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in.push_back(static_cast<char>(s & 0x000000ff));
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}
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std::vector<char> res = iconv_convert("UCS-2BE", "UCS-4BE", in);
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char const * tin = reinterpret_cast<char const *>(&ucs4str[0]);
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std::vector<char> in(tin, tin + ucs4str.size() * 4);
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std::vector<char> res = iconv_convert(ucs2_codeset, ucs4_codeset, in);
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return bytes_to_ucs2(res);
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}
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@ -244,14 +168,9 @@ ucs4_to_ucs2(std::vector<boost::uint32_t> const & ucs4str)
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std::vector<unsigned short>
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ucs4_to_ucs2(boost::uint32_t const * s, size_t ls)
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{
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std::vector<char> in;
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for (size_t i = 0; i < ls; ++i) {
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in.push_back(static_cast<char>((s[i] & 0xff000000) >> 24));
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in.push_back(static_cast<char>((s[i] & 0x00ff0000) >> 16));
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in.push_back(static_cast<char>((s[i] & 0x0000ff00) >> 8));
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in.push_back(static_cast<char>(s[i] & 0x000000ff));
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}
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std::vector<char> res = iconv_convert("UCS-2BE", "UCS-4BE", in);
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char const * tin = reinterpret_cast<char const *>(s);
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std::vector<char> in(tin, tin + ls * 4);
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std::vector<char> res = iconv_convert(ucs2_codeset, ucs4_codeset, in);
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return bytes_to_ucs2(res);
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}
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@ -259,44 +178,26 @@ ucs4_to_ucs2(boost::uint32_t const * s, size_t ls)
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unsigned short
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ucs4_to_ucs2(boost::uint32_t c)
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{
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std::vector<char> in;
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in.push_back(static_cast<char>((c & 0xff000000) >> 24));
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in.push_back(static_cast<char>((c & 0x00ff0000) >> 16));
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in.push_back(static_cast<char>((c & 0x0000ff00) >> 8));
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in.push_back(static_cast<char>(c & 0x000000ff));
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std::vector<char> res = iconv_convert("UCS-2BE", "UCS-4BE", in);
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std::vector<unsigned short> us = bytes_to_ucs2(res);
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if (!us.empty())
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return us[0];
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else
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return 0xfffd; // unknown character
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char const * tin = reinterpret_cast<char const *>(&c);
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std::vector<char> in(tin, tin + 4);
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std::vector<char> res = iconv_convert(ucs2_codeset, ucs4_codeset, in);
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return bytes_to_ucs2(res)[0];
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}
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std::vector<char> ucs4_to_utf8(std::vector<boost::uint32_t> const & ucs4str)
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{
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std::vector<char> in;
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std::vector<boost::uint32_t>::const_iterator cit = ucs4str.begin();
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std::vector<boost::uint32_t>::const_iterator end = ucs4str.end();
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for (; cit != end; ++cit) {
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boost::uint32_t s = *cit;
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in.push_back(static_cast<char>((s & 0xff000000) >> 24));
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in.push_back(static_cast<char>((s & 0x00ff0000) >> 16));
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in.push_back(static_cast<char>((s & 0x0000ff00) >> 8));
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in.push_back(static_cast<char>(s & 0x000000ff));
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}
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std::vector<char> res = iconv_convert("UTF-8", "UCS-4BE", in);
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char const * tin = reinterpret_cast<char const *>(&ucs4str[0]);
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std::vector<char> in(tin, tin + ucs4str.size() * 4);
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std::vector<char> res = iconv_convert("UTF-8", ucs4_codeset, in);
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return res;
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}
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std::vector<char> ucs4_to_utf8(boost::uint32_t c)
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{
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std::vector<char> in;
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in.push_back(static_cast<char>((c & 0xff000000) >> 24));
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in.push_back(static_cast<char>((c & 0x00ff0000) >> 16));
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in.push_back(static_cast<char>((c & 0x0000ff00) >> 8));
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in.push_back(static_cast<char>(c & 0x000000ff));
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std::vector<char> res = iconv_convert("UTF-8", "UCS-4BE", in);
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char const * tin = reinterpret_cast<char const *>(&c);
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std::vector<char> in(tin, tin + 4);
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std::vector<char> res = iconv_convert("UTF-8", ucs4_codeset, in);
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return res;
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}
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