130 lines
4.7 KiB
C++
130 lines
4.7 KiB
C++
// Copyright (c) 2009, Thomas Goyne
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// * Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above copyright notice,
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// this list of conditions and the following disclaimer in the documentation
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// and/or other materials provided with the distribution.
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// * Neither the name of the Aegisub Group nor the names of its contributors
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// may be used to endorse or promote products derived from this software
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// without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// -----------------------------------------------------------------------------
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//
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// AEGISUB
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//
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// Website: http://www.aegisub.net/
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// Contact: mailto:zeratul@cellosoft.com
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//
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#ifndef AEGISUB_CHARSET_CONV_H
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#define AEGISUB_CHARSET_CONV_H
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#include <iconv.h>
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#include <wchar.h>
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#include <wx/arrstr.h>
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#include <wx/thread.h>
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#include <wx/string.h>
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#include <wx/strconv.h>
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#include "aegisub_endian.h"
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#if !defined(_LIBICONV_VERSION) || _LIBICONV_VERSION < 0x010A || defined(LIBICONV_PLUG)
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#define ICONV_POSIX
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#endif
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class AegisubCSConv : public wxMBConv {
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public:
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// By default, any conversion that would be lossy will fail
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// When enableSubst is true, conversions to multibyte with a sufficiently large buffer
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// are guaranteed to succeed, with characters dropped or changed as needed to fit the
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// string into the target encoding.
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AegisubCSConv(const wxChar *mbEncName, bool enableSubst = false);
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virtual ~AegisubCSConv();
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// wxMBConv implementation; see strconv.h for usage details
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virtual size_t ToWChar(wchar_t *dst, size_t dstLen, const char *src, size_t srcLen = wxNO_LEN) const;
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virtual size_t FromWChar(char *dst, size_t dstLen, const wchar_t *src, size_t srcLen = wxNO_LEN) const;
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virtual size_t GetMBNulLen() const;
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virtual wxMBConv *Clone() const;
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// Get the length (in bytes) of a null-terminated string whose encoding is mbEncName
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size_t MBBuffLen(const char *str) const;
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// Get a list of support encodings with somewhat user-friendly names
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static wxArrayString GetEncodingsList();
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// Get a list of all encodings supported by iconv
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static wxArrayString GetAllSupportedEncodings();
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// Map a user-friendly encoding name to iconv's name
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static wxString GetRealEncodingName(wxString name);
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protected:
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iconv_t m2w, w2m;
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private:
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wxString wcCharsetName;
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wxString mbCharsetName;
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size_t mbNulLen;
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bool enableSubst;
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size_t doConversion(iconv_t cd, char *dst, size_t dstSize, char *src, size_t srcSize) const;
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size_t iconvWrapper(iconv_t cd, char **inbuf, size_t *inbytesleft, char **outbuf, size_t *outbytesleft) const;
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static void ucToMbFallback(
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unsigned int code,
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void (*callback) (const char *buf, size_t buflen, void* callback_arg),
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void *callback_arg,
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void *convPtr);
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char invalidRep[8];
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size_t invalidRepSize;
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#ifndef ICONV_POSIX
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iconv_fallbacks fallbacks;
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#endif
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#if wxUSE_THREADS
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// While iconv itself is thread-safe, using the same iconv_t on multiple threads is not
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wxMutex iconvMutex;
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#endif
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};
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// Predefined conversion for the current locale. Should be a drop-in replacement for wxConvLocal
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extern AegisubCSConv& csConvLocal;
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#ifdef HAVE_BIG_ENDIAN
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# if SIZEOF_WCHAR_T == 4
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# define WCHAR_T_ENCODING "UTF-32BE"
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# elif SIZEOF_WCHAR_T == 2
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# define WCHAR_T_ENCODING "UTF-16BE"
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# endif
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#elif defined(HAVE_LITTLE_ENDIAN)
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# if SIZEOF_WCHAR_T == 4
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# define WCHAR_T_ENCODING "UTF-32LE"
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# elif SIZEOF_WCHAR_T == 2
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# define WCHAR_T_ENCODING "UTF-16LE"
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# endif
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#else
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# if SIZEOF_WCHAR_T == 4
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# define WCHAR_T_ENCODING ((Endian::MachineToBig((uint32_t)1) == 1) ? "UTF-32BE" : "UTF-32LE")
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# elif SIZEOF_WCHAR_T == 2
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# define WCHAR_T_ENCODING ((Endian::MachineToBig((uint32_t)1) == 1) ? "UTF-16BE" : "UTF-16LE")
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# endif
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#endif
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#endif
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