tree 5109cc4d32d971e1247f505f9ff8c067a3ccb6f6
parent 72a2bfcaf01860ce8dd6921490d903dc0ad59c89
author Abhishek Kumar <abhishekkumar8222@gmail.com> 1610820673 +0000
committer Junio C Hamano <gitster@pobox.com> 1611015678 -0800

commit-graph: return 64-bit generation number

In a preparatory step for introducing corrected commit dates, let's
return timestamp_t values from commit_graph_generation(), use
timestamp_t for local variables and define GENERATION_NUMBER_INFINITY
as (2 ^ 63 - 1) instead.

We rename GENERATION_NUMBER_MAX to GENERATION_NUMBER_V1_MAX to
represent the largest topological level we can store in the commit data
chunk.

With corrected commit dates implemented, we will have two such *_MAX
variables to denote the largest offset and largest topological level
that can be stored.

Signed-off-by: Abhishek Kumar <abhishekkumar8222@gmail.com>
Reviewed-by: Taylor Blau <me@ttaylorr.com>
Reviewed-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>