mirror of
https://github.com/vcmi/vcmi.git
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329 lines
8.7 KiB
C++
329 lines
8.7 KiB
C++
/*
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* FileStream.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 "FileStream.h"
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#ifdef USE_SYSTEM_MINIZIP
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#include <minizip/unzip.h>
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#else
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#include "../minizip/unzip.h"
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#endif
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#include <cstdio>
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///copied from ioapi.c due to linker issues on MSVS
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#include "../minizip/ioapi.h"
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#if defined(__APPLE__) || defined(IOAPI_NO_64)
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// In darwin and perhaps other BSD variants off_t is a 64 bit value, hence no need for specific 64 bit functions
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#define FOPEN_FUNC(filename, mode) fopen(filename, mode)
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#define FTELLO_FUNC(stream) ftello(stream)
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#define FSEEKO_FUNC(stream, offset, origin) fseeko(stream, offset, origin)
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#else
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#define FOPEN_FUNC(filename, mode) fopen64(filename, mode)
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#define FTELLO_FUNC(stream) ftello64(stream)
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#define FSEEKO_FUNC(stream, offset, origin) fseeko64(stream, offset, origin)
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#endif
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voidpf call_zopen64 (const zlib_filefunc64_32_def* pfilefunc,const void*filename,int mode)
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{
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if (pfilefunc->zfile_func64.zopen64_file != NULL)
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return (*(pfilefunc->zfile_func64.zopen64_file)) (pfilefunc->zfile_func64.opaque,filename,mode);
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else
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{
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return (*(pfilefunc->zopen32_file))(pfilefunc->zfile_func64.opaque,(const char*)filename,mode);
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}
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}
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long call_zseek64(const zlib_filefunc64_32_def* pfilefunc, voidpf filestream, ZPOS64_T offset, int origin)
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{
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if (pfilefunc->zfile_func64.zseek64_file != NULL)
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return (*(pfilefunc->zfile_func64.zseek64_file)) (pfilefunc->zfile_func64.opaque, filestream, offset, origin);
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else
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{
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uLong offsetTruncated = (uLong)offset;
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if (offsetTruncated != offset)
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return -1;
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else
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return (*(pfilefunc->zseek32_file))(pfilefunc->zfile_func64.opaque, filestream, offsetTruncated, origin);
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}
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}
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ZPOS64_T call_ztell64(const zlib_filefunc64_32_def* pfilefunc, voidpf filestream)
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{
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if (pfilefunc->zfile_func64.zseek64_file != NULL)
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return (*(pfilefunc->zfile_func64.ztell64_file)) (pfilefunc->zfile_func64.opaque, filestream);
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else
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{
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uLong tell_uLong = (*(pfilefunc->ztell32_file))(pfilefunc->zfile_func64.opaque, filestream);
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if ((tell_uLong) == MAXU32)
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return (ZPOS64_T)-1;
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else
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return tell_uLong;
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}
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}
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static uLong ZCALLBACK fread_file_func OF((voidpf opaque, voidpf stream, void* buf, uLong size));
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static uLong ZCALLBACK fwrite_file_func OF((voidpf opaque, voidpf stream, const void* buf,uLong size));
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static ZPOS64_T ZCALLBACK ftell64_file_func OF((voidpf opaque, voidpf stream));
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static long ZCALLBACK fseek64_file_func OF((voidpf opaque, voidpf stream, ZPOS64_T offset, int origin));
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static int ZCALLBACK fclose_file_func OF((voidpf opaque, voidpf stream));
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static int ZCALLBACK ferror_file_func OF((voidpf opaque, voidpf stream));
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static voidpf ZCALLBACK fopen64_file_func(voidpf opaque, const void* filename, int mode)
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{
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FILE* file = NULL;
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const char* mode_fopen = NULL;
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if ((mode & ZLIB_FILEFUNC_MODE_READWRITEFILTER) == ZLIB_FILEFUNC_MODE_READ)
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mode_fopen = "rb";
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else
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if (mode & ZLIB_FILEFUNC_MODE_EXISTING)
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mode_fopen = "r+b";
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else
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if (mode & ZLIB_FILEFUNC_MODE_CREATE)
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mode_fopen = "wb";
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if ((filename != NULL) && (mode_fopen != NULL))
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file = FOPEN_FUNC((const char*)filename, mode_fopen);
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return file;
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}
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static uLong ZCALLBACK fread_file_func(voidpf opaque, voidpf stream, void* buf, uLong size)
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{
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uLong ret;
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ret = (uLong)fread(buf, 1, (size_t)size, (FILE *)stream);
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return ret;
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}
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static uLong ZCALLBACK fwrite_file_func(voidpf opaque, voidpf stream, const void* buf, uLong size)
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{
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uLong ret;
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ret = (uLong)fwrite(buf, 1, (size_t)size, (FILE *)stream);
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return ret;
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}
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static ZPOS64_T ZCALLBACK ftell64_file_func(voidpf opaque, voidpf stream)
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{
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ZPOS64_T ret;
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ret = FTELLO_FUNC((FILE *)stream);
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return ret;
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}
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static long ZCALLBACK fseek64_file_func(voidpf opaque, voidpf stream, ZPOS64_T offset, int origin)
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{
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int fseek_origin = 0;
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long ret;
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switch (origin)
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{
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case ZLIB_FILEFUNC_SEEK_CUR:
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fseek_origin = SEEK_CUR;
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break;
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case ZLIB_FILEFUNC_SEEK_END:
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fseek_origin = SEEK_END;
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break;
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case ZLIB_FILEFUNC_SEEK_SET:
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fseek_origin = SEEK_SET;
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break;
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default: return -1;
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}
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ret = 0;
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if (FSEEKO_FUNC((FILE *)stream, offset, fseek_origin) != 0)
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ret = -1;
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return ret;
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}
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static int ZCALLBACK fclose_file_func(voidpf opaque, voidpf stream)
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{
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int ret;
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ret = fclose((FILE *)stream);
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return ret;
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}
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static int ZCALLBACK ferror_file_func(voidpf opaque, voidpf stream)
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{
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int ret;
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ret = ferror((FILE *)stream);
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return ret;
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}
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///end of ioapi.c
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//extern MINIZIP_EXPORT void fill_fopen64_filefunc(zlib_filefunc64_def* pzlib_filefunc_def);
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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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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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#define GETFILE static_cast<std::FILE*>(filePtr)
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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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void fill_fopen64_filefunc(zlib_filefunc64_def* pzlib_filefunc_def)
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{
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pzlib_filefunc_def->zopen64_file = fopen64_file_func;
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pzlib_filefunc_def->zread_file = fread_file_func;
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pzlib_filefunc_def->zwrite_file = fwrite_file_func;
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pzlib_filefunc_def->ztell64_file = ftell64_file_func;
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pzlib_filefunc_def->zseek64_file = fseek64_file_func;
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pzlib_filefunc_def->zclose_file = fclose_file_func;
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pzlib_filefunc_def->zerror_file = ferror_file_func;
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pzlib_filefunc_def->opaque = NULL;
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}
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template struct boost::iostreams::stream<VCMI_LIB_WRAP_NAMESPACE(FileBuf)>;
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VCMI_LIB_NAMESPACE_BEGIN
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zlib_filefunc64_def* FileStream::GetMinizipFilefunc()
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{
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static zlib_filefunc64_def MinizipFilefunc;
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static bool initialized = false;
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if (!initialized)
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{
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fill_fopen64_filefunc(&MinizipFilefunc);
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MinizipFilefunc.zopen64_file = &MinizipOpenFunc;
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initialized = true;
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}
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return &MinizipFilefunc;
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}
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/*static*/
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bool FileStream::CreateFile(const boost::filesystem::path& filename)
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{
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FILE* f = do_open(filename.c_str(), CHAR_LITERAL("wb"));
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bool result = (f != nullptr);
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if(result)
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fclose(f);
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return result;
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}
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FileBuf::FileBuf(const boost::filesystem::path& filename, std::ios_base::openmode mode)
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{
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auto openmode = [mode]() -> std::basic_string<CharType>
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{
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using namespace std;
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switch (mode & (~ios_base::ate & ~ios_base::binary))
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{
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case (ios_base::in):
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return CHAR_LITERAL("r");
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case (ios_base::out):
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case (ios_base::out | ios_base::trunc):
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return CHAR_LITERAL("w");
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case (ios_base::app):
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case (ios_base::out | ios_base::app):
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return CHAR_LITERAL("a");
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case (ios_base::out | ios_base::in):
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return CHAR_LITERAL("r+");
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case (ios_base::out | ios_base::in | ios_base::trunc):
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return CHAR_LITERAL("w+");
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case (ios_base::out | ios_base::in | ios_base::app):
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case (ios_base::in | ios_base::app):
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return CHAR_LITERAL("a+");
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default:
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throw std::ios_base::failure("invalid open mode");
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}
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}();
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if (mode & std::ios_base::binary)
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openmode += CHAR_LITERAL('b');
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filePtr = do_open(filename.c_str(), openmode.c_str());
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if (filePtr == nullptr)
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throw std::ios_base::failure("could not open file");
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if (mode & std::ios_base::ate) {
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if (std::fseek(GETFILE, 0, SEEK_END)) {
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fclose(GETFILE);
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throw std::ios_base::failure("could not open file");
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}
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}
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}
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void FileBuf::close()
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{
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std::fclose(GETFILE);
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}
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std::streamsize FileBuf::read(char* s, std::streamsize n)
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{
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return static_cast<std::streamsize>(std::fread(s, 1, n, GETFILE));
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}
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std::streamsize FileBuf::write(const char* s, std::streamsize n)
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{
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return static_cast<std::streamsize>(std::fwrite(s, 1, n, GETFILE));
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}
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std::streamoff FileBuf::seek(std::streamoff off, std::ios_base::seekdir way)
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{
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const auto src = [way]() -> int
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{
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switch(way)
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{
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case std::ios_base::beg:
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return SEEK_SET;
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case std::ios_base::cur:
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return SEEK_CUR;
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case std::ios_base::end:
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return SEEK_END;
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default:
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throw std::ios_base::failure("bad seek direction");
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}
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}();
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if(std::fseek(GETFILE, (long)off, src))
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throw std::ios_base::failure("bad seek offset");
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return static_cast<std::streamsize>(std::ftell(GETFILE));
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}
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VCMI_LIB_NAMESPACE_END
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