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pack-revindex: remove unused 'find_revindex_position()' 

Now that all 'find_revindex_position()' callers have been removed (and
converted to the more descriptive 'offset_to_pack_pos()'), it is almost
safe to get rid of 'find_revindex_position()' entirely. Almost, except
for the fact that 'offset_to_pack_pos()' calls
'find_revindex_position()'.

Inline 'find_revindex_position()' into 'offset_to_pack_pos()', and
then remove 'find_revindex_position()' entirely.

This is a straightforward refactoring with one minor snag.
'offset_to_pack_pos()' used to load the index before calling
'find_revindex_position()'. That means that by the time
'find_revindex_position()' starts executing, 'p->num_objects' can be
safely read. After inlining, be careful to not read 'p->num_objects'
until _after_ 'load_pack_revindex()' (which loads the index as a
side-effect) has been called.

Another small fix that is included is converting the upper- and
lower-bounds to be unsigned's instead of ints. This dates back to
92e5c77c37 (revindex: export new APIs, 2013-10-24)--ironically, the last
time we introduced new APIs here--but this unifies the types.

Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Taylor Blau 2021-01-13 17:25:02 -05:00 committed by Junio C Hamano
parent 1c3855f33b
commit 8389855a9b
2 changed files with 12 additions and 20 deletions
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31
pack-revindex.c
View File

@ -169,16 +169,23 @@ int load_pack_revindex(struct packed_git *p)
return 0;
}
int find_revindex_position(struct packed_git *p, off_t ofs)
int offset_to_pack_pos(struct packed_git *p, off_t ofs, uint32_t *pos)
{
int lo = 0;
int hi = p->num_objects + 1;
const struct revindex_entry *revindex = p->revindex;
unsigned lo, hi;
const struct revindex_entry *revindex;
if (load_pack_revindex(p) < 0)
return -1;
lo = 0;
hi = p->num_objects + 1;
revindex = p->revindex;
do {
const unsigned mi = lo + (hi - lo) / 2;
if (revindex[mi].offset == ofs) {
return mi;
*pos = mi;
return 0;
} else if (ofs < revindex[mi].offset)
hi = mi;
else
@ -189,20 +196,6 @@ int find_revindex_position(struct packed_git *p, off_t ofs)
return -1;
}
int offset_to_pack_pos(struct packed_git *p, off_t ofs, uint32_t *pos)
{
int ret;
if (load_pack_revindex(p) < 0)
return -1;
ret = find_revindex_position(p, ofs);
if (ret < 0)
return ret;
*pos = ret;
return 0;
}
uint32_t pack_pos_to_index(struct packed_git *p, uint32_t pos)
{
if (!p->revindex)

1
pack-revindex.h
View File

@ -28,7 +28,6 @@ struct revindex_entry {
* given pack, returning zero on success and a negative value otherwise.
*/
int load_pack_revindex(struct packed_git *p);
int find_revindex_position(struct packed_git *p, off_t ofs);
/*
* offset_to_pack_pos converts an object offset to a pack position. This