[Patches] [Patch #100510] largefile support for Win64 (and some other fixes)

[noreply@sourceforge.net]

Patch #100510 has been updated. 

Project: 
Category: core (C code)
Status: Closed
Summary: largefile support for Win64 (and some other fixes)

Follow-Ups:

Date: 2000-Jun-06 19:56
By: tmick

Comment:
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Date: 2000-Jun-06 19:58
By: tmick

Comment:
This patch adds largefile support for Win64 and Linux64 (the latter already
motly worked I think),  and fixes some possible buffer overflows on all
systems with largefile support.

NOTE: this patch depends on my earlier patch to PC/config.h and configure.in
for SIZEOF_OFF_T and SIZEOF_FPOS_T. (see: "[Patches] changes to configure.in
and PC/config.h for 64-bit systems")

Win64 largefile support involved fixing file_seek, file_tell, and
file_truncate to properly handle large indeces and to use the proper Win64
system APIs. Win64 does not have 64-bit capable versions of ftell and fseek,
this could be worked around with fgetpos() and fsetpos() (and _telli64(), and
64-bit tell()). _portable_ftell() and _portable_fseek() were written to hold
the platform dependent logic. You are still restricted to 32-bits for single
reads and writes.

Previously _chsize was used blindly as the replacement for ftruncate() in
Win32. In fact, _chsize() is not 64-bit capable so and appropriate overflow
check was added.

There are some type histrionics involved because off_t is only 32-bits on
Win64. fpos_t is 64-bits, however, so fpos_t is used for Win64.

As well, the patch adds some necessary overflow checks (raising OverflowError
when an overflow is detected). See file_read for example.

A forthcoming patch adds a test to the test suite for this largefile support.

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Date: 2000-Jun-27 07:50
By: gvanrossum

Comment:
Tim- after you're fine with this, please assign to someone with a Linux box for further review.
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Date: 2000-Jun-29 17:07
By: tim_one

Comment:
Looks good to me.  Passed on to Fred.  Fred, Guido wants someone to check this on Linux.  Since you have the 64-bit Linux development disk, you're elected <wink>.
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Date: 2000-Jul-09 23:37
By: tim_one

Comment:
Fred, do something with this or assign it to some other Unix geek?

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Date: 2000-Jul-13 17:21
By: fdrake

Comment:
This looks good on platforms I have easy access to (linux/x86, linux/ia32 simulator).  I do not have Linux+LFS (large file support; a kernel patch) installed on any machines, and could not test in that environment without having a separate machine to use as a test bed.

Accepted as is; we can work out any problems that arise as needed, but it doesn't seem to break things.
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Date: 2000-Jul-31 08:03
By: gvanrossum

Comment:
This was accepted ages ago.  What are you waiting for?
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Date: 2000-Aug-11 12:04
By: tmick

Comment:
Sorry about the delay.
Had to make some small changes to get the old patch to apply.
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For more info, visit:

http://sourceforge.net/patch/?func=detailpatch&patch_id=100510&group_id=5470