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* unicode.[Ch]: new IconvProcessor class that enable to split iconv_convert() initialization and conversion parts.
* docstring.C: utf8_to_ucs4() makes use of IconvProcessor instead of iconv_convert. The IconvProcessor interface will permit to switch to another processor than iconv. git-svn-id: svn://svn.lyx.org/lyx/lyx-devel/trunk@15609 a592a061-630c-0410-9148-cb99ea01b6c8
This commit is contained in:
Abdelrazak Younes
parent
8c20105106
commit
826c31a80d
@ -56,6 +56,8 @@ std::string const to_ascii(docstring const & ucs4)
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void utf8_to_ucs4(std::string const & utf8, docstring & ucs4)
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{
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static IconvProcessor iconv(ucs4_codeset, "UTF-8");
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size_t n = utf8.size();
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// as utf8 is a multi-byte encoding, there would be at most
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// n characters:
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@ -68,8 +70,7 @@ void utf8_to_ucs4(std::string const & utf8, docstring & ucs4)
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// basic_string::data() is not recognized by some old gcc version
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// so we use &(ucs4[0]) instead.
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char * outbuf = (char *)(&(ucs4[0]));
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int bytes = iconv_convert(cd, ucs4_codeset, "UTF-8",
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utf8.c_str(), n, outbuf, maxoutsize);
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int bytes = iconv.convert(utf8.c_str(), n, outbuf, maxoutsize);
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// adjust to the real converted size
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ucs4.resize(bytes/4);
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@ -22,11 +22,10 @@
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#include <iomanip>
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#include <map>
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using std::endl;
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namespace lyx {
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using std::endl;
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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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@ -35,52 +34,93 @@ using std::endl;
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char const * ucs2_codeset = "UCS-2LE";
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#endif
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int iconv_convert(int & cd,
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char const * tocode,
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char const * fromcode,
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char const * buf,
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size_t buflen,
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char * outbuf,
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size_t maxoutsize)
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static const iconv_t invalid_cd = (iconv_t)(-1);
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struct IconvProcessor::Private {
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Private(): cd(invalid_cd) {}
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iconv_t cd;
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};
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IconvProcessor::IconvProcessor(char const * tocode,
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char const * fromcode): tocode_(tocode), fromcode_(fromcode),
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pimpl_(new IconvProcessor::Private)
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{
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}
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IconvProcessor::~IconvProcessor()
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{
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if (iconv_close(pimpl_->cd) == -1) {
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lyxerr << "Error returned from iconv_close("
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<< errno << ")" << endl;
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}
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delete pimpl_;
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}
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bool IconvProcessor::init()
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{
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if (pimpl_->cd != invalid_cd)
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return true;
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pimpl_->cd = iconv_open(tocode_.c_str(), fromcode_.c_str());
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if (pimpl_->cd != invalid_cd)
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return true;
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lyxerr << "Error returned from iconv_open" << endl;
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switch (errno) {
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case EINVAL:
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lyxerr << "EINVAL The conversion from " << fromcode_
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<< " to " << tocode_
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<< " is not supported by the implementation."
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<< endl;
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break;
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default:
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lyxerr << "\tSome other error: " << errno << endl;
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break;
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}
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return false;
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}
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int IconvProcessor::convert(char const * buf, size_t buflen,
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char * outbuf, size_t maxoutsize)
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{
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if (buflen == 0)
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return 0;
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if (cd == -1) {
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cd = (int)(iconv_open(tocode, fromcode));
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if (cd == -1) {
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lyxerr << "Error returned from iconv_open" << endl;
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switch (errno) {
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case EINVAL:
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lyxerr << "EINVAL The conversion from " << fromcode
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<< " to " << tocode
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<< " is not supported by the implementation."
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<< endl;
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break;
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default:
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lyxerr << "\tSome other error: " << errno << endl;
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break;
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}
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}
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if (pimpl_->cd == invalid_cd) {
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if (!init())
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return -1;
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}
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char ICONV_CONST * inbuf = const_cast<char ICONV_CONST *>(buf);
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size_t inbytesleft = buflen;
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size_t outbytesleft = maxoutsize;
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int res = iconv((iconv_t)(cd), &inbuf, &inbytesleft, &outbuf, &outbytesleft);
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int res = iconv(pimpl_->cd, &inbuf, &inbytesleft, &outbuf, &outbytesleft);
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if (res == -1) {
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lyxerr << "Error returned from iconv" << endl;
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switch (errno) {
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//lyxerr << std::dec;
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//lyxerr << "Inbytesleft: " << inbytesleft << endl;
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//lyxerr << "Outbytesleft: " << outbytesleft << endl;
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if (res != -1)
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// Everything went well.
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return maxoutsize - outbytesleft;
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// There are some errors in the conversion
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lyxerr << "Error returned from iconv" << endl;
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switch (errno) {
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case E2BIG:
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lyxerr << "E2BIG There is not sufficient room at *outbuf." << endl;
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break;
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case EILSEQ:
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lyxerr << "EILSEQ An invalid multibyte sequence"
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<< " has been encountered in the input.\n"
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<< "When converting from " << fromcode
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<< " to " << tocode << ".\n";
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<< " has been encountered in the input.\n"
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<< "When converting from " << fromcode_
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<< " to " << tocode_ << ".\n";
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lyxerr << "Input: " << std::hex;
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for (size_t i = 0; i < buflen; ++i) {
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boost::uint32_t const b = buf[i];
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@ -90,9 +130,9 @@ int iconv_convert(int & cd,
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break;
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case EINVAL:
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lyxerr << "EINVAL An incomplete multibyte sequence"
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<< " has been encountered in the input.\n"
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<< "When converting from " << fromcode
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<< " to " << tocode << ".\n";
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<< " has been encountered in the input.\n"
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<< "When converting from " << fromcode_
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<< " to " << tocode_ << ".\n";
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lyxerr << "Input: " << std::hex;
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for (size_t i = 0; i < buflen; ++i) {
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boost::uint32_t const b = buf[i];
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@ -103,20 +143,14 @@ int iconv_convert(int & cd,
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default:
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lyxerr << "\tSome other error: " << errno << endl;
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break;
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}
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// We got an error so we close down the conversion engine
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if (iconv_close((iconv_t)(cd)) == -1) {
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lyxerr << "Error returned from iconv_close("
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<< errno << ")" << endl;
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}
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cd = -1;
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}
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//lyxerr << std::dec;
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//lyxerr << "Inbytesleft: " << inbytesleft << endl;
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//lyxerr << "Outbytesleft: " << outbytesleft << endl;
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return maxoutsize - outbytesleft;
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// We got an error so we close down the conversion engine
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if (iconv_close(pimpl_->cd) == -1) {
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lyxerr << "Error returned from iconv_close("
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<< errno << ")" << endl;
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}
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pimpl_->cd = invalid_cd;
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return -1;
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}
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@ -125,9 +159,7 @@ namespace {
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template<typename RetType, typename InType>
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std::vector<RetType>
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iconv_convert(int & cd,
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char const * tocode,
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char const * fromcode,
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iconv_convert(IconvProcessor & processor,
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InType const * buf,
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size_t buflen)
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{
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@ -141,7 +173,7 @@ iconv_convert(int & cd,
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static char out[outsize];
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char * outbuf = out;
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int bytes = lyx::iconv_convert(cd, tocode, fromcode, inbuf, inbytesleft, outbuf, outsize);
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int bytes = processor.convert(inbuf, inbytesleft, outbuf, outsize);
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RetType const * tmp = reinterpret_cast<RetType const *>(out);
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return std::vector<RetType>(tmp, tmp + bytes / sizeof(RetType));
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@ -162,9 +194,8 @@ std::vector<lyx::char_type> utf8_to_ucs4(std::vector<char> const & utf8str)
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std::vector<lyx::char_type>
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utf8_to_ucs4(char const * utf8str, size_t ls)
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{
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static int cd = -1;
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return iconv_convert<lyx::char_type>(cd, ucs4_codeset, "UTF-8",
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utf8str, ls);
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static IconvProcessor processor(ucs4_codeset, "UTF-8");
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return iconv_convert<lyx::char_type>(processor, utf8str, ls);
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}
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@ -188,9 +219,8 @@ ucs2_to_ucs4(std::vector<unsigned short> const & ucs2str)
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std::vector<lyx::char_type>
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ucs2_to_ucs4(unsigned short const * ucs2str, size_t ls)
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{
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static int cd = -1;
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return iconv_convert<lyx::char_type>(cd, ucs4_codeset, ucs2_codeset,
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ucs2str, ls);
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static IconvProcessor processor(ucs4_codeset, ucs2_codeset);
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return iconv_convert<lyx::char_type>(processor, ucs2str, ls);
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}
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@ -214,17 +244,16 @@ ucs4_to_ucs2(std::vector<lyx::char_type> const & ucs4str)
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std::vector<unsigned short>
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ucs4_to_ucs2(lyx::char_type const * s, size_t ls)
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{
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static int cd = -1;
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return iconv_convert<unsigned short>(cd, ucs2_codeset, ucs4_codeset,
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s, ls);
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static IconvProcessor processor(ucs2_codeset, ucs4_codeset);
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return iconv_convert<unsigned short>(processor, s, ls);
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}
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std::vector<char>
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ucs4_to_utf8(lyx::char_type c)
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{
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static int cd = -1;
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return iconv_convert<char>(cd, "UTF-8", ucs4_codeset, &c, 1);
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static IconvProcessor processor("UTF-8", ucs4_codeset);
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return iconv_convert<char>(processor, &c, 1);
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}
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@ -241,31 +270,32 @@ ucs4_to_utf8(std::vector<lyx::char_type> const & ucs4str)
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std::vector<char>
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ucs4_to_utf8(lyx::char_type const * ucs4str, size_t ls)
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{
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static int cd = -1;
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return iconv_convert<char>(cd, "UTF-8", ucs4_codeset,
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ucs4str, ls);
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static IconvProcessor processor("UTF-8", ucs4_codeset);
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return iconv_convert<char>(processor, ucs4str, ls);
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}
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std::vector<lyx::char_type>
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eightbit_to_ucs4(char const * s, size_t ls, std::string const & encoding)
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{
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static std::map<std::string, int> cd;
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if (cd.find(encoding) == cd.end())
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cd[encoding] = -1;
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return iconv_convert<char_type>(cd[encoding], ucs4_codeset,
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encoding.c_str(), s, ls);
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static std::map<std::string, IconvProcessor> processors;
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if (processors.find(encoding) == processors.end()) {
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IconvProcessor processor(ucs4_codeset, encoding.c_str());
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processors.insert(std::make_pair(encoding, processor));
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}
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return iconv_convert<char_type>(processors[encoding], s, ls);
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}
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std::vector<char>
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ucs4_to_eightbit(lyx::char_type const * ucs4str, size_t ls, std::string const & encoding)
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{
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static std::map<std::string, int> cd;
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if (cd.find(encoding) == cd.end())
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cd[encoding] = -1;
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return iconv_convert<char>(cd[encoding], encoding.c_str(),
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ucs4_codeset, ucs4str, ls);
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static std::map<std::string, IconvProcessor> processors;
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if (processors.find(encoding) == processors.end()) {
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IconvProcessor processor(encoding.c_str(), ucs4_codeset);
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processors.insert(std::make_pair(encoding, processor));
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}
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return iconv_convert<char>(processors[encoding], ucs4str, ls);
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}
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} // namespace lyx
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@ -15,11 +15,39 @@
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#include "support/types.h"
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#include <string>
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#include <vector>
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namespace lyx {
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class IconvProcessor
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{
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public:
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IconvProcessor(
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char const * tocode = "",
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char const * fromcode = "");
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~IconvProcessor();
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/// convert any data from \c fromcode to \c tocode unicode format.
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/// \return the number of bytes of the converted output buffer.
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int convert(
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char const * in_buffer,
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size_t in_size,
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char * out_buffer,
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size_t max_out_size);
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private:
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/// open iconv.
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/// \return true if the processor is ready to use.
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bool init();
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std::string const tocode_;
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std::string const fromcode_;
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struct Private;
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Private * pimpl_;
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};
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// utf8_to_ucs4
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// A single codepoint conversion for utf8_to_ucs4 does not make
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@ -66,16 +94,6 @@ eightbit_to_ucs4(char const * s, size_t ls, std::string const & encoding);
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std::vector<char>
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ucs4_to_eightbit(lyx::char_type const * ucs4str, size_t ls, std::string const & encoding);
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/// convert any data from \c fromcode to \c tocode unicode format.
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/// \return the number of bytes of the converted output buffer.
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extern int iconv_convert(int & cd,
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char const * tocode,
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char const * fromcode,
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char const * buf, ///< maximum input buffer
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size_t buflen, ///< maximum input buffer size in bytes
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char * outbuf, ///< maximum output buffer
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size_t maxoutsize); ///< maximum output buffer size in bytes
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extern char const * ucs4_codeset;
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extern char const * ucs2_codeset;
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