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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6725 | siemargl | 1 | /* |
| 2 | Copyright (c) 1990-2009 Info-ZIP. All rights reserved. |
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| 3 | |||
| 4 | See the accompanying file LICENSE, version 2009-Jan-02 or later |
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| 5 | (the contents of which are also included in zip.h) for terms of use. |
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| 6 | If, for some reason, all these files are missing, the Info-ZIP license |
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| 7 | also may be found at: ftp://ftp.info-zip.org/pub/infozip/license.html |
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| 8 | */ |
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| 9 | /*--------------------------------------------------------------------------- |
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| 10 | |||
| 11 | win32/win32i64.c - UnZip 6 |
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| 12 | |||
| 13 | 64-bit filesize support for WIN32 Zip and UnZip. |
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| 14 | ---------------------------------------------------------------------------*/ |
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| 15 | |||
| 16 | #include "../zip.h" |
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| 17 | |||
| 18 | /* --------------------------------------------------- */ |
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| 19 | /* Large File Support |
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| 20 | * |
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| 21 | * Initial functions by E. Gordon and R. Nausedat |
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| 22 | * 9/10/2003 |
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| 23 | * |
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| 24 | * These implement 64-bit file support for Windows. The |
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| 25 | * defines and headers are in win32/osdep.h. |
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| 26 | * |
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| 27 | * These moved from win32.c by Mike White to avoid conflicts |
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| 28 | * in WiZ of same name functions in UnZip and Zip libraries. |
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| 29 | * 9/25/04 EG |
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| 30 | */ |
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| 31 | |||
| 32 | #if defined(LARGE_FILE_SUPPORT) && !defined(__CYGWIN__) |
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| 33 | # ifdef USE_STRM_INPUT |
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| 34 | |||
| 35 | # ifndef zftello |
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| 36 | /* 64-bit buffered ftello |
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| 37 | * |
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| 38 | * Win32 does not provide a 64-bit buffered |
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| 39 | * ftell (in the published api anyway) so below provides |
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| 40 | * hopefully close version. |
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| 41 | * We have not gotten _telli64 to work with buffered |
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| 42 | * streams. Below cheats by using fgetpos improperly and |
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| 43 | * may not work on other ports. |
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| 44 | */ |
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| 45 | |||
| 46 | zoff_t zftello(stream) |
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| 47 | FILE *stream; |
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| 48 | { |
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| 49 | fpos_t fpos = 0; |
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| 50 | |||
| 51 | if (fgetpos(stream, &fpos) != 0) { |
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| 52 | return -1L; |
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| 53 | } else { |
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| 54 | return fpos; |
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| 55 | } |
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| 56 | } |
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| 57 | # endif /* ndef zftello */ |
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| 58 | |||
| 59 | |||
| 60 | # ifndef zfseeko |
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| 61 | /* 64-bit buffered fseeko |
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| 62 | * |
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| 63 | * Win32 does not provide a 64-bit buffered |
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| 64 | * fseeko, so use _lseeki64 and fflush. Note |
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| 65 | * that SEEK_CUR can lose track of location |
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| 66 | * if fflush is done between the last buffered |
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| 67 | * io and this call. |
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| 68 | */ |
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| 69 | |||
| 70 | int zfseeko(stream, offset, origin) |
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| 71 | FILE *stream; |
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| 72 | zoff_t offset; |
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| 73 | int origin; |
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| 74 | { |
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| 75 | |||
| 76 | /* fseek() or its replacements are supposed to clear the eof status |
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| 77 | of the stream. fflush() and _lseeki64() do not touch the stream's |
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| 78 | eof flag, so we have to do it manually. */ |
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| 79 | #if ((defined(_MSC_VER) && (_MSC_VER >= 1200)) || \ |
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| 80 | (defined(__MINGW32__) && defined(__MSVCRT_VERSION__))) |
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| 81 | /* For the MSC environment (VS 6 or higher), and for recent releases of |
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| 82 | the MinGW environment, we "know" the internals of the FILE structure. |
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| 83 | So, we can clear just the EOF bit of the status flag. */ |
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| 84 | stream->_flag &= ~_IOEOF; |
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| 85 | #else |
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| 86 | /* Unfortunately, there is no standard "cleareof()" function, so we have |
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| 87 | to use clearerr(). This has the unwanted side effect of clearing the |
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| 88 | ferror() state as well. */ |
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| 89 | clearerr(stream); |
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| 90 | #endif |
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| 91 | |||
| 92 | if (origin == SEEK_CUR) { |
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| 93 | /* instead of synching up lseek easier just to figure and |
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| 94 | use an absolute offset */ |
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| 95 | offset += zftello(stream); |
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| 96 | origin = SEEK_SET; |
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| 97 | } |
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| 98 | fflush(stream); |
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| 99 | if (_lseeki64(fileno(stream), offset, origin) == (zoff_t)-1L) { |
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| 100 | return -1; |
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| 101 | } else { |
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| 102 | return 0; |
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| 103 | } |
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| 104 | } |
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| 105 | # endif /* ndef fseeko */ |
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| 106 | # endif /* USE_STRM_INPUT */ |
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| 107 | #endif /* Win32 LARGE_FILE_SUPPORT */ |
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| 108 | |||
| 109 | #if 0 |
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| 110 | FILE* zfopen(filename, mode) |
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| 111 | const char *filename; |
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| 112 | const char *mode; |
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| 113 | { |
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| 114 | FILE* fTemp; |
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| 115 | |||
| 116 | fTemp = fopen(filename, mode); |
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| 117 | if( fTemp == NULL ) |
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| 118 | return NULL; |
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| 119 | |||
| 120 | /* sorry, could not make VC60 and its rtl work properly without setting the |
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| 121 | * file buffer to NULL. the problem seems to be _telli64 which seems to |
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| 122 | * return the max stream position, comments are welcome |
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| 123 | */ |
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| 124 | setbuf(fTemp, NULL); |
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| 125 | |||
| 126 | return fTemp; |
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| 127 | } |
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| 128 | #endif |
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| 129 | /* --------------------------------------------------- */ |