diff options
Diffstat (limited to 'blahtexml/source/UnicodeConverter.cpp')
| -rw-r--r-- | blahtexml/source/UnicodeConverter.cpp | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/blahtexml/source/UnicodeConverter.cpp b/blahtexml/source/UnicodeConverter.cpp new file mode 100644 index 0000000..4267b04 --- /dev/null +++ b/blahtexml/source/UnicodeConverter.cpp @@ -0,0 +1,222 @@ +// File "UnicodeConverter.cpp" +// +// blahtex (version 0.4.4) +// a TeX to MathML converter designed with MediaWiki in mind +// Copyright (C) 2006, David Harvey +// +// This program is free software; you can redistribute it and/or modify +// it under the terms of the GNU General Public License as published by +// the Free Software Foundation; either version 2 of the License, or +// (at your option) any later version. +// +// This program is distributed in the hope that it will be useful, +// but WITHOUT ANY WARRANTY; without even the implied warranty of +// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +// GNU General Public License for more details. +// +// You should have received a copy of the GNU General Public License +// along with this program; if not, write to the Free Software +// Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + +#include "UnicodeConverter.h" +#include <iostream> +#include <stdexcept> +#include <cerrno> + +using namespace std; + +UnicodeConverter::~UnicodeConverter() +{ + if (mIsOpen) + { + iconv_close(mInHandle); + iconv_close(mOutHandle); + } +} + +void UnicodeConverter::Open() +{ + if (mIsOpen) + throw logic_error( + "UnicodeConverter::Open called on already open object" + ); + + if (sizeof(wchar_t) != 4) + throw runtime_error( + "The wchar_t data type on this system is not four bytes wide" + ); + + // Determine endian-ness of wchar_t. + // (Really we should be able to just use "WCHAR_T". This unfortunately + // doesn't seem to available on darwin.) + wchar_t testChar = L'A'; + const char* UcsString = + (*(reinterpret_cast<char*>(&testChar)) == 'A') + ? "UCS-4LE" : "UCS-4BE"; + + mInHandle = iconv_open(UcsString, "UTF-8"); + if (mInHandle == (iconv_t)(-1)) + { + switch (errno) + { + case EMFILE: + throw runtime_error( + "iconv_open failed with errno == EMFILE" + ); + case ENFILE: + throw runtime_error( + "iconv_open failed with errno == ENFILE" + ); + case ENOMEM: + throw runtime_error( + "iconv_open failed with errno == ENOMEM" + ); + case EINVAL: + throw runtime_error( + "iconv_open failed with errno == EINVAL" + ); + default: + throw runtime_error( + "iconv_open failed with unknown error code" + ); + } + } + + mOutHandle = iconv_open("UTF-8", UcsString); + if (mOutHandle == (iconv_t)(-1)) + { + switch (errno) + { + case EMFILE: + throw runtime_error( + "iconv_open failed with errno == EMFILE" + ); + case ENFILE: + throw runtime_error( + "iconv_open failed with errno == ENFILE" + ); + case ENOMEM: + throw runtime_error( + "iconv_open failed with errno == ENOMEM" + ); + case EINVAL: + throw runtime_error( + "iconv_open failed with errno == EINVAL" + ); + default: + throw runtime_error( + "iconv_open failed with unknown error code" + ); + } + } + + mIsOpen = true; +} + +wstring UnicodeConverter::ConvertIn(const string& input) +{ + if (!mIsOpen) + throw logic_error( + "UnicodeConverter::ConvertIn called " + "before UnicodeConverter::Open" + ); + + char* inputBuf = new char[input.size()]; + memcpy(inputBuf, input.c_str(), input.size()); + + char* outputBuf = new char[input.size() * 4]; + + // The following garbage is needed to handle the unfortunate + // inconsistency between Linux and BSD definitions for the second + // parameter of iconv. BSD (including Mac OS X) requires const char*, + // whereas Linux requires char*, and neither option seems to produce + // error-free, warning-free compilation on both systems simultaneously. +#ifdef BLAHTEX_ICONV_CONST + const +#endif + char* source = inputBuf; + char* dest = outputBuf; + + size_t inBytesLeft = input.size(); + size_t outBytesLeft = input.size() * 4; + + if (iconv( + mInHandle, + &source, + &inBytesLeft, + &dest, + &outBytesLeft + ) == -1) + { + delete[] inputBuf; + delete[] outputBuf; + switch (errno) + { + case EILSEQ: + case EINVAL: throw UnicodeConverter::Exception(); + default: + throw logic_error( + "Conversion problem in UnicodeConverter::ConvertIn" + ); + } + } + + wstring output( + reinterpret_cast<wchar_t*>(outputBuf), + input.size() - outBytesLeft / 4 + ); + delete[] inputBuf; + delete[] outputBuf; + return output; +} + +string UnicodeConverter::ConvertOut(const wstring& input) +{ + if (!mIsOpen) + throw logic_error( + "UnicodeConverter::ConvertOut called " + "before UnicodeConverter::Open" + ); + + wchar_t* inputBuf = new wchar_t[input.size()]; + wmemcpy(inputBuf, input.c_str(), input.size()); + + char* outputBuf = new char[input.size() * 4]; + +#ifdef BLAHTEX_ICONV_CONST + const +#endif + char* source = reinterpret_cast<char*>(inputBuf); + char* dest = outputBuf; + + size_t inBytesLeft = input.size() * 4; + size_t outBytesLeft = input.size() * 4; + + if (iconv( + mOutHandle, + &source, + &inBytesLeft, + &dest, + &outBytesLeft + ) == -1) + { + delete[] inputBuf; + delete[] outputBuf; + switch (errno) + { + case EILSEQ: + case EINVAL: throw UnicodeConverter::Exception(); + default: + throw logic_error( + "Conversion problem in UnicodeConverter::ConvertIn" + ); + } + } + + string output(outputBuf, input.size() * 4 - outBytesLeft); + delete[] inputBuf; + delete[] outputBuf; + return output; +} + +// end of file @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@ |