92 lines
3.1 KiB
C
92 lines
3.1 KiB
C
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/* Copyright 2002-2006 The MathWorks, Inc. */
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/* io64.h
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*
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* Include this header file if you need to perform file I/O
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* on large files greater than 2GB (2^31-1 bytes).
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* The definitions in this header file are designed to facilitate
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* cross-platform 64 bit file I/O.
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*
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* This file must be included before any other include file, at the
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* very top of your source file, even before system include files
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* such as stdio.h, to enable 64 bit file I/O for mex files.
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*
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* After including this file (io64.h), you should use the following
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* functions, structs and types for file I/O to enable file I/O beyond
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* the 2GB (2^31-1 byte) limit:
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*
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* fopen() - 64 bit capable after including this file, use as always
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* with no changes
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*
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* getFilePos() - use this function instead of ftell(), as ftell() is
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* not supported for 64 bit file I/O on most platforms.
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* getFilePos() is an alias for the POSIX fgetpos()
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*
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* setFilePos() - use this function instead of fseek(), as fseek() is
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* not supported for 64 bit file I/O on most platforms.
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* setFilePos() is an alias for the POSIX fsetpos()
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*
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* fpos_T - the offset argument for getFilePos() and setFilePos()
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* is really a pointer to a signed 64 bit integer,
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* int64_T, but it must be cast to (fpos_T*)
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*
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* getFileStat() - use this function instead of stat() to get the size
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* in bytes of a file on disk specified by name
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*
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* getFileFstat() - use this function instead of fstat() to get the size
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* in bytes of an opened file specified by a FILE* pointer
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*
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* structStat - use a pointer to a structStat instead of a pointer to
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* struct stat as argument to getFileStat() and
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* getFileFstat()
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*
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* No changes are required for the following functions:
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*
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* fprintf(), fscanf(), fread(), fwrite(), fclose().
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*/
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#ifndef __tmw__io64__h__
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#define __tmw__io64__h__
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#define TMW_ENABLE_INT64 (-1)
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/* linux, hpux - must be defined before any other include file */
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#if defined(__linux__)
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# undef _LARGEFILE64_SOURCE
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# define _LARGEFILE64_SOURCE
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#endif
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#include <stdio.h>
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#include <sys/stat.h>
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#if defined(_WIN32) /* windows */
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# define getFilePos fgetpos
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# define setFilePos fsetpos
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# define structStat struct _stati64
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# define getFileStat _stati64
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# define getFileFstat _fstati64
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# define fileno _fileno
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# define fpos_T fpos_t
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#elif defined(__APPLE__) /* mac */
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# define getFilePos fgetpos
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# define setFilePos fsetpos
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# define structStat struct stat
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# define getFileStat stat
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# define getFileFstat fstat
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# define fpos_T fpos_t
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#elif defined(__linux__) || defined(__sun)
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# if defined(__GNUC__) && (__GNUC__ >= 3)
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/* fopen works for large files as-is */
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# else
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# define fopen fopen64
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# endif
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# define getFilePos fgetpos64
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# define setFilePos fsetpos64
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# define structStat struct stat64
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# define getFileStat stat64
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# define getFileFstat fstat64
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# define fpos_T fpos64_t
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#endif
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#endif /* __tmw__io64__h__ */
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