[PATCH 0/3] use size_t for a few sizes that are 32 bits everywhere

[Elia Pinto <gitter.spiros@gmail.com>]

Unlike the previous series, these aren't about "long" on Windows: the
types involved ("uint32_t", "int", "unsigned int") are 32 bits on every
platform. They were found by scanning a native 64-bit Linux build with
-Wshorten-64-to-32. That scan sees the "unsigned long" -> 32-bit
conversions that a Windows target can't see, because there "long" is
already 32 bits.

- 1/3 hashwrite(): a corrupt pack when pack-objects writes a compressed
  buffer of 4GiB or more in one call;
- 2/3 count_lines(): a wrong diff -B --stat for files of 2GiB or more;
- 3/3 hash_chars(): renames of files of 4GiB or more aren't recognised.

No tests, because they need GiB-sized inputs; each was verified by
simulating the truncation at 16 bits.

The other results of that scan are bounded by the format or by the input
(options, masks, line lengths, xdiff limited to 1023MiB). It doesn't
depend on the other series in flight and merges cleanly with them. Based
on master 50fe5cc63f.

Elia Pinto (3):
  csum-file: use size_t for the count passed to hashwrite()
  diff: use size_t for the size passed to count_lines()
  diffcore-delta: use size_t for the size of the buffer to hash

 csum-file.c      | 2 +-
 csum-file.h      | 2 +-
 diff.c           | 2 +-
 diffcore-delta.c | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)


base-commit: 50fe5cc63f9cd6e89b87a2c9ccf96a444f4cfdb7
-- 
2.53.0