comparison mercurial/revlogutils/nodemap.py @ 46199:8e7ce6555ea7

nodemap: match comment to actual code

REV_OFFSET constant is 2, not 10.

Differential Revision: https://phab.mercurial-scm.org/D9688

46198:72007a9ac064

# The trie is stored as a sequence of block. Each block contains 16 entries
# (signed 64bit integer, big endian). Each entry can be one of the following:
#
#  * value >=  0 -> index of sub-block
#  * value == -1 -> no value
#  * value <  -1 -> a revision value: rev = -(value+10)
#
# The implementation focus on simplicity, not on performance. A Rust
# implementation should provide a efficient version of the same binary
# persistence. This reference python implementation is never meant to be
# extensively use in production.

46199:8e7ce6555ea7

# The trie is stored as a sequence of block. Each block contains 16 entries
# (signed 64bit integer, big endian). Each entry can be one of the following:
#
#  * value >=  0 -> index of sub-block
#  * value == -1 -> no value
#  * value <  -1 -> encoded revision: rev = -(value+2)
#
# See REV_OFFSET and _transform_rev below.
#
# The implementation focus on simplicity, not on performance. A Rust
# implementation should provide a efficient version of the same binary
# persistence. This reference python implementation is never meant to be
# extensively use in production.