teach --histogram to diff
authorTay Ray Chuan <rctay89@gmail.com>
Tue, 12 Jul 2011 06:10:25 +0000 (14:10 +0800)
committerJunio C Hamano <gitster@pobox.com>
Tue, 12 Jul 2011 16:29:20 +0000 (09:29 -0700)
commit8c912eea94a2138e8bc608f7c390eb0b313effb0
tree244d67eaac3f77d6645bdf69b87e23a90dbb2485
parent46c8f2988dc9a6012babd5833a6245ceff214483
teach --histogram to diff

Port JGit's HistogramDiff algorithm over to C. Rough numbers (TODO) show
that it is faster than its --patience cousin, as well as the default
Meyers algorithm.

The implementation has been reworked to use structs and pointers,
instead of bitmasks, thus doing away with JGit's 2^28 line limit.

We also use xdiff's default hash table implementation (xdl_hash_bits()
with XDL_HASHLONG()) for convenience.

Signed-off-by: Tay Ray Chuan <rctay89@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Makefile
diff.c
merge-recursive.c
t/t4049-diff-histogram.sh [new file with mode: 0755]
xdiff/xdiff.h
xdiff/xdiffi.c
xdiff/xdiffi.h
xdiff/xhistogram.c [new file with mode: 0644]