tree 40b1f2bd3234e22c1f90740df87a7a6c761ac02c
parent 61a42bf1eefb73fc0d9529d4504c9d32128ec436
author Elliott Hughes <enh@google.com> 1659041925 +0000
committer Elliott Hughes <enh@google.com> 1659041925 +0000

fread: cope with >2GiB totals.

The FILE::_read function pointer takes an int rather than a size_t, so
we need to be careful to break large reads up for it.

fwrite() hasn't (yet) been optimized in this way, so it's immune for
now, but add the corresponding write test anyway.

Seeking already uses a off64_t function pointer where possible, so I
don't think there's anything more to be done there.

No other function pointers in FILE are relevant.

Bug: https://issuetracker.google.com/240139009
Test: treehugger
Change-Id: Ife2537e10f178bb0d980719592539f4b00b67031