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Initialize loop variable of ccan_list_for_each

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On platforms where `typeof` is unsupported, `ccan_container_off_var`
calculates the offset of member by pointer subtraction.  Although this
will result in the compile-time invariant value regardless the pointer
value, the loop variable will be used before assignment and may cause
an using uninitialized variable warning.
This commit is contained in:
Nobuyoshi Nakada 2023-12-24 15:47:20 +09:00
parent 86893b28f7
commit 61289d9405
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GPG Key ID: 3582D74E1FEE4465
1 changed files with 4 additions and 2 deletions
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6
ccan/list/list.h
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@ -635,14 +635,16 @@ static inline void ccan_list_prepend_list_(struct ccan_list_head *to,
/* internal macros, do not use directly */ /* internal macros, do not use directly */
#define ccan_list_for_each_off_dir_(h, i, off, dir) \ #define ccan_list_for_each_off_dir_(h, i, off, dir) \
for (i = ccan_list_node_to_off_(ccan_list_debug(h, CCAN_LIST_LOC)->n.dir, \ for (i = 0, \
i = ccan_list_node_to_off_(ccan_list_debug(h, CCAN_LIST_LOC)->n.dir, \
(off)); \ (off)); \
ccan_list_node_from_off_((void *)i, (off)) != &(h)->n; \ ccan_list_node_from_off_((void *)i, (off)) != &(h)->n; \
i = ccan_list_node_to_off_(ccan_list_node_from_off_((void *)i, (off))->dir, \ i = ccan_list_node_to_off_(ccan_list_node_from_off_((void *)i, (off))->dir, \
(off))) (off)))
#define ccan_list_for_each_safe_off_dir_(h, i, nxt, off, dir) \ #define ccan_list_for_each_safe_off_dir_(h, i, nxt, off, dir) \
for (i = ccan_list_node_to_off_(ccan_list_debug(h, CCAN_LIST_LOC)->n.dir, \ for (i = 0, \
i = ccan_list_node_to_off_(ccan_list_debug(h, CCAN_LIST_LOC)->n.dir, \
(off)), \ (off)), \
nxt = ccan_list_node_to_off_(ccan_list_node_from_off_(i, (off))->dir, \ nxt = ccan_list_node_to_off_(ccan_list_node_from_off_(i, (off))->dir, \
(off)); \ (off)); \