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list: make LIST_FOREACH() and LIST_FOREACH_BACKWARDS() safer

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Yu Watanabe
2022-03-15 16:47:01 +09:00
parent 03677889f0
commit 80a226b26b
16 changed files with 33 additions and 30 deletions
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13
src/basic/list.h
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@@ -139,14 +139,17 @@
/* The type of the iterator 'i' is automatically determined by the type of 'head', and declared in the
* loop. Hence, do not declare the same variable in the outer scope. Sometimes, we set 'head' through
* hashmap_get(). In that case, you need to explicitly cast the result. */
#define LIST_FOREACH_WITH_NEXT(name,i,n,head) \
for (typeof(*(head)) *n, *i = (head); i && (n = i->name##_next, true); i = n)
#define LIST_FOREACH(name,i,head) \
for (typeof(*(head)) *i = (head); i; i = i->name##_next)
LIST_FOREACH_WITH_NEXT(name, i, UNIQ_T(n, UNIQ), head)
#define LIST_FOREACH_SAFE(name,i,n,head) \
for (typeof(*(head)) *n, *i = (head); i && ((n = i->name##_next), 1); i = n)
#define _LIST_FOREACH_WITH_PREV(name,i,p,start) \
for (typeof(*(start)) *p, *i = (start); i && (p = i->name##_prev, true); i = p)
#define LIST_FOREACH_BACKWARDS(name,i,p) \
for (typeof(*(p)) *i = (p); i; i = i->name##_prev)
#define LIST_FOREACH_BACKWARDS(name,i,start) \
_LIST_FOREACH_WITH_PREV(name, i, UNIQ_T(p, UNIQ), start)
/* Iterate through all the members of the list p is included in, but skip over p */
#define LIST_FOREACH_OTHERS(name,i,p) \