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name-rev: restructure creating/updating 'struct rev_name' instances

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At the beginning of the recursive name_rev() function it creates a new
'struct rev_name' instance for each previously unvisited commit or, if
this visit results in better name for an already visited commit, then
updates the 'struct rev_name' instance attached to the commit, or
returns early.

Restructure this so it's caller creates or updates the 'struct
rev_name' instance associated with the commit to be passed as
parameter, i.e. both name_ref() before calling name_rev() and
name_rev() itself as it iterates over the parent commits.

This makes eliminating the recursion a bit easier to follow, and the
condition moved to name_ref() will be moved back to name_rev() after
the recursion is eliminated.

This change also plugs the memory leak that was temporarily unplugged
in the earlier "name-rev: pull out deref handling from the recursion"
patch in this series.

Signed-off-by: SZEDER Gábor <szeder.dev@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
SZEDER Gábor 2019-11-12 11:38:18 +01:00 committed by Junio C Hamano
parent dd432a6ecf
commit 3a52150301
1 changed files with 21 additions and 14 deletions
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35
builtin/name-rev.c
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@ -111,14 +111,12 @@ static void name_rev(struct commit *commit,
struct commit_list *parents;
int parent_number = 1;
if (!create_or_update_name(commit, tip_name, taggerdate, generation,
distance, from_tag))
return;
for (parents = commit->parents;
parents;
parents = parents->next, parent_number++) {
struct commit *parent = parents->item;
const char *new_name;
int new_generation, new_distance;
parse_commit(parent);
if (parent->date < cutoff)
@ -126,7 +124,6 @@ static void name_rev(struct commit *commit,
if (parent_number > 1) {
size_t len;
char *new_name;
strip_suffix(tip_name, "^0", &len);
if (generation > 0)
@ -135,15 +132,19 @@ static void name_rev(struct commit *commit,
else
new_name = xstrfmt("%.*s^%d", (int)len, tip_name,
parent_number);
name_rev(parent, new_name, taggerdate, 0,
distance + MERGE_TRAVERSAL_WEIGHT,
from_tag);
new_generation = 0;
new_distance = distance + MERGE_TRAVERSAL_WEIGHT;
} else {
name_rev(parent, tip_name, taggerdate,
generation + 1, distance + 1,
from_tag);
new_name = tip_name;
new_generation = generation + 1;
new_distance = distance + 1;
}
if (create_or_update_name(parent, new_name, taggerdate,
new_generation, new_distance,
from_tag))
name_rev(parent, new_name, taggerdate,
new_generation, new_distance, from_tag);
}
}
@ -280,11 +281,17 @@ static int name_ref(const char *path, const struct object_id *oid, int flags, vo
path = name_ref_abbrev(path, can_abbreviate_output);
if (commit->date >= cutoff) {
const char *tip_name;
char *to_free = NULL;
if (deref)
tip_name = xstrfmt("%s^0", path);
tip_name = to_free = xstrfmt("%s^0", path);
else
tip_name = xstrdup(path);
name_rev(commit, tip_name, taggerdate, 0, 0, from_tag);
if (create_or_update_name(commit, tip_name, taggerdate,
0, 0, from_tag))
name_rev(commit, tip_name, taggerdate, 0, 0,
from_tag);
else
free(to_free);
}
}
return 0;