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Resizing a file stream ?

Started by Tylon Apr 12, 2002 at 5:46 AM 5 replies 650+ views

Original Post

Apr 12, 2002 at 5:46 AM

oki, i have a binary read/write file open, and i want to ''erase'' some of the file and make it smaller. can anyone tell me how to do that? (in my specific case, i just want to delete everything after the file pointer, basically set the current pointer position to eof, and just delete everything after it)

Oluseyi

Apr 12, 2002 at 11:53 AM

Read the file into memory, close the file, reopen the file and overwrite the sucker. fstreams don''t do insertion and they don''t do dynamic data file management.

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Thanks to Kylotan for the idea!

Tylon

Apr 12, 2002 at 12:08 PM

well, i was hoping there was better way to do that, since the files in question are gonna be upto several hundred megs.

anyway, just for anyone interested, i have found a way to resize a file since my initial post. its done with functions _chsize (win) or truncate (linux).

yes it is possible

Oluseyi

Apr 12, 2002 at 12:15 PM

quote:
Original post by Tylon
yes it is possible

Tylon

Apr 12, 2002 at 12:21 PM

ah yeah, just noticed it takes a handle, good enough for me. os independancy is not an issue.
(although linux + windows would be enough portability for me anyway)

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