[PATCH 4/5] string-list.[ch]: add a string_list_init_{nodup,dup}()
From: Ævar Arnfjörð Bjarmason <hidden>
Date: 2021-07-01 10:51:43
Subsystem:
the rest · Maintainer:
Linus Torvalds
In order to use the new "memcpy() a 'blank' struct on the stack"
pattern for string_list_init(), and to make the macro initialization
consistent with the function initialization introduce two new
string_list_init_{nodup,dup}() functions. These are like the old
string_list_init() when called with a false and true second argument,
respectively.
I think this not only makes things more consistent, but also easier to
read. I often had to lookup what the ", 0)" or ", 1)" in these
invocations meant, now it's right there in the function name, and
corresponds to the macros.
A subsequent commit will convert existing API users to this pattern,
but as this is a very common API let's leave a compatibility function
in place for later removal. This intermediate state also proves that
the compatibility function works.
Signed-off-by: Ævar Arnfjörð Bjarmason <redacted>
---
string-list.c | 18 ++++++++++++++++--
string-list.h | 11 +++++++++--
2 files changed, 25 insertions(+), 4 deletions(-)
diff --git a/string-list.c b/string-list.c
index a917955fbd8..43576ad1265 100644
--- a/string-list.c
+++ b/string-list.c@@ -1,10 +1,24 @@ #include "cache.h" #include "string-list.h" +void string_list_init_nodup(struct string_list *list) +{ + struct string_list blank = STRING_LIST_INIT_NODUP; + memcpy(list, &blank, sizeof(*list)); +} + +void string_list_init_dup(struct string_list *list) +{ + struct string_list blank = STRING_LIST_INIT_DUP; + memcpy(list, &blank, sizeof(*list)); +} + void string_list_init(struct string_list *list, int strdup_strings) { - memset(list, 0, sizeof(*list)); - list->strdup_strings = strdup_strings; + if (strdup_strings) + string_list_init_dup(list); + else + string_list_init_nodup(list); } /* if there is no exact match, point to the index where the entry could be
diff --git a/string-list.h b/string-list.h
index 521b9c0748d..0d6b4692396 100644
--- a/string-list.h
+++ b/string-list.h@@ -97,8 +97,15 @@ struct string_list { /* General functions which work with both sorted and unsorted lists. */ /** - * Initialize the members of the string_list, set `strdup_strings` - * member according to the value of the second parameter. + * Initialize the members of a string_list pointer in the same way as + * the corresponding `STRING_LIST_INIT_NODUP` and + * `STRING_LIST_INIT_DUP` macros. + */ +void string_list_init_nodup(struct string_list *list); +void string_list_init_dup(struct string_list *list); + +/** + * TODO remove: For compatibility with any in-flight older API users */ void string_list_init(struct string_list *list, int strdup_strings);
--
2.32.0.623.ge833f40cd87