Find all needed information about Fseek Large File Support. Below you can see links where you can find everything you want to know about Fseek Large File Support.
https://stackoverflow.com/questions/6615953/fseek-now-supports-large-files
Jul 07, 2011 · The code above writes a big file with the entries 1-10^9 in binary size_t format. And then writes the last 10 entries, seeking from the beginning of the file, and seek from the end of file. c++ 64-bit large-files fseek
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.4.0/com.ibm.zos.v2r4.bpxbd00/fseek.htm
Large file support for MVS™ data sets, VSAM data sets, and z/OS UNIX files: For AMODE 31 C/C++ applications, the fseek() function accepts a signed 4-byte offset and therefore cannot be used to directly or relatively position to offsets beyond 2 GB - 1. To avoid repositioning limitations, AMODE 31 C/C++ applications should define the _LARGE ...
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.3.0/com.ibm.zos.v2r3.bpxbd00/ftell.htm
Large file support for MVS™ data sets, VSAM data sets, and z/OS UNIX files: For AMODE 31 C/C++ applications, the ftell() function accepts a signed 4-byte offset and therefore cannot be used to directly or relatively position to offsets beyond 2 GB - 1. To avoid repositioning limitations, AMODE 31 C/C++ applications should define the _LARGE ...
https://wiki.sei.cmu.edu/confluence/display/c/FIO19-C.+Do+not+use+fseek%28%29+and+ftell%28%29+to+compute+the+size+of+a+regular+file
Compliant Solution (POSIX ftello()) If the code needs to handle large files, it is preferable to use fseeko() and ftello() because, for some implementations, they can handle larger file offsets than fseek() and ftell() can handle. If they are used, the file_size variable should have type off_t to avoid the possibility of overflow when assigning the return value of ftello() to it.[IEEE Std 1003.1:2013]: XSH, System Interfaces, fopen, XSH, System Interfaces, fwrite
https://docs.microsoft.com/en-us/cpp/c-runtime-library/reference/fseek-fseeki64
You can use fseek and _fseeki64 to reposition the pointer anywhere in a file. The pointer can also be positioned beyond the end of the file. fseek and _fseeki64 clears the end-of-file indicator and negates the effect of any prior ungetc calls against stream.. When a file is opened for appending data, the current file position is determined by the last I/O operation, not by where the next write ...
https://www.ibm.com/support/knowledgecenter/en/SSLTBW_2.1.0/com.ibm.zos.v2r1.cbcpx01/ioposit.htm
With large file support enabled for AMODE 31 C/C++ applications, you can use the following library functions for 64-bit offsets: fseeko() fseeko_unlocked() ... Since you cannot calculate the block number from a relative byte offset in a variable-format file, fseek() may have to read through the file …
http://www.qnx.com/developers/docs/6.5.0SP1.update/com.qnx.doc.neutrino_lib_ref/f/fseek.html
The fseeko64() function is a large-file support version of fseeko(). These functions clear the end-of-file indicator, and undo any effects of the ungetc() function on the stream. You can use ftell(), ftello(), or ftello64() to get the current position of the stream before changing it.
https://www.mathworks.com/help/matlab/ref/fseek.html
fseek(fileID, offset, origin) sets the file position indicator offset bytes from origin in the specified file. status = fseek( ___ ) returns 0 when the operation is successful. Otherwise, fseek returns -1 .
http://en.cppreference.com/w/c/io/fseek
If an output is performed after this seek, any read from the gap will return zero bytes. Where supported by the filesystem, this creates a sparse file. POSIX also requires that fseek first performs fflush if there are any unwritten data (but whether the shift state is restored is implementation-defined). Example
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