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string-list: return index directly when inserting an existing element

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When inserting an existing element, "add_entry" would convert "index"
value to "-1-index" to indicate the caller that this element is in the
list already. However, in "string_list_insert", we would simply convert
this to the original positive index without any further action.

In 8fd2cb4069 (Extract helper bits from c-merge-recursive work,
2006-07-25), we create "path-list.c" and then introduce above code path.

Let's directly return the index as we don't care about whether the
element is in the list by using "add_entry". In the future, if we want
to let "add_entry" tell the caller, we may add "int *exact_match"
parameter to "add_entry" instead of converting the index to negative to
indicate.

Signed-off-by: shejialuo <shejialuo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
shejialuo 2025-06-29 12:27:57 +08:00 committed by Junio C Hamano
parent 394e063bf9
commit 885becd9c4
1 changed files with 1 additions and 5 deletions
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6
string-list.c
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@ -40,14 +40,13 @@ static int get_entry_index(const struct string_list *list, const char *string,
return right;
}
/* returns -1-index if already exists */
static int add_entry(struct string_list *list, const char *string)
{
int exact_match = 0;
int index = get_entry_index(list, string, &exact_match);
if (exact_match)
return -1 - index;
return index;
ALLOC_GROW(list->items, list->nr+1, list->alloc);
if (index < list->nr)
@ -65,9 +64,6 @@ struct string_list_item *string_list_insert(struct string_list *list, const char
{
int index = add_entry(list, string);
if (index < 0)
index = -1 - index;
return list->items + index;
}