mirror of
https://github.com/vcmi/vcmi.git
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313 lines
7.6 KiB
C++
313 lines
7.6 KiB
C++
/*
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* MinizipExtensions.cpp, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#include "StdInc.h"
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#include "MinizipExtensions.h"
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#include "CMemoryBuffer.h"
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#include <mutex>
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VCMI_LIB_NAMESPACE_BEGIN
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template<class Stream>
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inline uLong streamRead(voidpf opaque, voidpf stream, void * buf, uLong size)
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{
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assert(opaque != nullptr);
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assert(stream != nullptr);
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auto * actualStream = static_cast<Stream *>(stream);
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return static_cast<uLong>(actualStream->read(static_cast<ui8 *>(buf), size));
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}
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template<class Stream>
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inline ZPOS64_T streamTell(voidpf opaque, voidpf stream)
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{
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assert(opaque != nullptr);
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assert(stream != nullptr);
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auto * actualStream = static_cast<Stream *>(stream);
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return actualStream->tell();
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}
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template<class Stream>
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inline long streamSeek(voidpf opaque, voidpf stream, ZPOS64_T offset, int origin)
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{
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assert(opaque != nullptr);
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assert(stream != nullptr);
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auto * actualStream = static_cast<Stream *>(stream);
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long ret = 0;
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switch(origin)
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{
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case ZLIB_FILEFUNC_SEEK_CUR:
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if(actualStream->skip(offset) != offset)
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ret = -1;
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break;
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case ZLIB_FILEFUNC_SEEK_END:
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{
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const si64 pos = actualStream->getSize() - offset;
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if(actualStream->seek(pos) != pos)
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ret = -1;
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}
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break;
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case ZLIB_FILEFUNC_SEEK_SET:
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if(actualStream->seek(offset) != offset)
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ret = -1;
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break;
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default:
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ret = -1;
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}
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if(ret == -1)
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logGlobal->error("Stream seek failed");
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return 0;
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}
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template<class Stream>
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inline int streamProxyClose(voidpf opaque, voidpf stream)
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{
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assert(opaque != nullptr);
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assert(stream != nullptr);
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auto * actualStream = static_cast<Stream *>(stream);
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logGlobal->trace("Proxy stream closed");
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actualStream->seek(0);
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return 0;
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}
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///CDefaultIOApi
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#define GETFILE static_cast<std::FILE*>(filePtr)
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#ifdef VCMI_WINDOWS
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#ifndef _CRT_SECURE_NO_WARNINGS
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#define _CRT_SECURE_NO_WARNINGS
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#endif
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#include <cwchar>
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#define CHAR_LITERAL(s) L##s
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using CharType = wchar_t;
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#else
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#define CHAR_LITERAL(s) s
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using CharType = char;
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#endif
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static inline FILE* do_open(const CharType* name, const CharType* mode)
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{
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#ifdef VCMI_WINDOWS
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return _wfopen(name, mode);
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#else
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return std::fopen(name, mode);
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#endif
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}
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static voidpf ZCALLBACK MinizipOpenFunc(voidpf opaque, const void* filename, int mode)
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{
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const CharType* mode_fopen = [mode]() -> const CharType*
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{
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if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ)
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return CHAR_LITERAL("rb");
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else if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
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return CHAR_LITERAL("r+b");
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else if (mode & ZLIB_FILEFUNC_MODE_CREATE)
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return CHAR_LITERAL("wb");
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return nullptr;
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}();
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if (filename != nullptr && mode_fopen != nullptr)
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return do_open(static_cast<const CharType*>(filename), mode_fopen);
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else
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return nullptr;
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}
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zlib_filefunc64_def CDefaultIOApi::getApiStructure()
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{
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static zlib_filefunc64_def MinizipFilefunc;
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static std::once_flag flag;
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std::call_once(flag, []
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{
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fill_fopen64_filefunc(&MinizipFilefunc);
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MinizipFilefunc.zopen64_file = &MinizipOpenFunc;
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});
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return MinizipFilefunc;
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}
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#if MINIZIP_NEEDS_32BIT_FUNCS
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zlib_filefunc_def CDefaultIOApi::getApiStructure32()
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{
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static zlib_filefunc_def MinizipFilefunc;
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static std::once_flag flag;
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std::call_once(flag, []
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{
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fill_fopen_filefunc(&MinizipFilefunc);
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MinizipFilefunc.zopen_file = reinterpret_cast<void*(*)(void*, const char*, int)>(&MinizipOpenFunc);
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});
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return MinizipFilefunc;
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}
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#endif
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///CProxyIOApi
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CProxyIOApi::CProxyIOApi(CInputOutputStream * buffer):
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data(buffer)
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{
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}
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//must be instantiated in .cpp file for access to complete types of all member fields
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CProxyIOApi::~CProxyIOApi() = default;
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zlib_filefunc64_def CProxyIOApi::getApiStructure()
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{
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zlib_filefunc64_def api;
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api.opaque = this;
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api.zopen64_file = &openFileProxy;
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api.zread_file = &readFileProxy;
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api.zwrite_file = &writeFileProxy;
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api.ztell64_file = &tellFileProxy;
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api.zseek64_file = &seekFileProxy;
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api.zclose_file = &closeFileProxy;
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api.zerror_file = &errorFileProxy;
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return api;
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}
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voidpf ZCALLBACK CProxyIOApi::openFileProxy(voidpf opaque, const void * filename, int mode)
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{
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assert(opaque != nullptr);
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boost::filesystem::path path;
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if(filename != nullptr)
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path = static_cast<const boost::filesystem::path::value_type *>(filename);
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return (static_cast<CProxyIOApi *>(opaque))->openFile(path, mode);
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}
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uLong ZCALLBACK CProxyIOApi::readFileProxy(voidpf opaque, voidpf stream, void * buf, uLong size)
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{
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return streamRead<CInputOutputStream>(opaque, stream, buf, size);
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}
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uLong ZCALLBACK CProxyIOApi::writeFileProxy(voidpf opaque, voidpf stream, const void * buf, uLong size)
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{
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assert(opaque != nullptr);
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assert(stream != nullptr);
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auto * actualStream = static_cast<CInputOutputStream *>(stream);
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return static_cast<uLong>(actualStream->write(static_cast<const ui8 *>(buf), size));
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}
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ZPOS64_T ZCALLBACK CProxyIOApi::tellFileProxy(voidpf opaque, voidpf stream)
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{
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return streamTell<CInputOutputStream>(opaque, stream);
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}
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long ZCALLBACK CProxyIOApi::seekFileProxy(voidpf opaque, voidpf stream, ZPOS64_T offset, int origin)
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{
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return streamSeek<CInputOutputStream>(opaque, stream, offset, origin);
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}
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int ZCALLBACK CProxyIOApi::closeFileProxy(voidpf opaque, voidpf stream)
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{
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return streamProxyClose<CInputOutputStream>(opaque, stream);
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}
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int ZCALLBACK CProxyIOApi::errorFileProxy(voidpf opaque, voidpf stream)
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{
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return 0;
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}
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CInputOutputStream * CProxyIOApi::openFile(const boost::filesystem::path & filename, int mode)
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{
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logGlobal->trace("CProxyIOApi: stream opened for %s with mode %d", filename.string(), mode);
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data->seek(0);
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return data;
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}
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///CProxyROIOApi
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CProxyROIOApi::CProxyROIOApi(CInputStream * buffer):
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data(buffer)
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{
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}
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//must be instantiated in .cpp file for access to complete types of all member fields
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CProxyROIOApi::~CProxyROIOApi() = default;
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zlib_filefunc64_def CProxyROIOApi::getApiStructure()
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{
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zlib_filefunc64_def api;
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api.opaque = this;
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api.zopen64_file = &openFileProxy;
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api.zread_file = &readFileProxy;
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api.zwrite_file = &writeFileProxy;
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api.ztell64_file = &tellFileProxy;
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api.zseek64_file = &seekFileProxy;
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api.zclose_file = &closeFileProxy;
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api.zerror_file = &errorFileProxy;
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return api;
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}
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CInputStream * CProxyROIOApi::openFile(const boost::filesystem::path& filename, int mode)
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{
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logGlobal->trace("CProxyROIOApi: stream opened for %s with mode %d", filename.string(), mode);
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data->seek(0);
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return data;
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}
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voidpf ZCALLBACK CProxyROIOApi::openFileProxy(voidpf opaque, const void* filename, int mode)
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{
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assert(opaque != nullptr);
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boost::filesystem::path path;
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if(filename != nullptr)
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path = static_cast<const boost::filesystem::path::value_type *>(filename);
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return (static_cast<CProxyROIOApi *>(opaque))->openFile(path, mode);
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}
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uLong ZCALLBACK CProxyROIOApi::readFileProxy(voidpf opaque, voidpf stream, void * buf, uLong size)
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{
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return streamRead<CInputStream>(opaque, stream, buf, size);
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}
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uLong ZCALLBACK CProxyROIOApi::writeFileProxy(voidpf opaque, voidpf stream, const void* buf, uLong size)
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{
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logGlobal->error("Attempt to write to read-only stream");
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return 0;
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}
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ZPOS64_T ZCALLBACK CProxyROIOApi::tellFileProxy(voidpf opaque, voidpf stream)
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{
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return streamTell<CInputStream>(opaque, stream);
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}
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long ZCALLBACK CProxyROIOApi::seekFileProxy(voidpf opaque, voidpf stream, ZPOS64_T offset, int origin)
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{
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return streamSeek<CInputStream>(opaque, stream, offset, origin);
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}
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int ZCALLBACK CProxyROIOApi::closeFileProxy(voidpf opaque, voidpf stream)
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{
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return streamProxyClose<CInputStream>(opaque, stream);
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}
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int ZCALLBACK CProxyROIOApi::errorFileProxy(voidpf opaque, voidpf stream)
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{
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return 0;
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}
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VCMI_LIB_NAMESPACE_END
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