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Replace the use of "0" with "NULL" where appropriate in dllist.c, for

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good style and to satisfy sparse. From Alvaro Herrera.
This commit is contained in:
Neil Conway 2005-01-18 22:59:32 +00:00
parent b4e7e9ad6f
commit 1f5299bc3f
1 changed files with 31 additions and 31 deletions
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62
src/backend/lib/dllist.c
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@ -9,7 +9,7 @@
* *
* *
* IDENTIFICATION * IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/lib/dllist.c,v 1.30 2004/12/31 21:59:48 pgsql Exp $ * $PostgreSQL: pgsql/src/backend/lib/dllist.c,v 1.31 2005/01/18 22:59:32 neilc Exp $
* *
*------------------------------------------------------------------------- *-------------------------------------------------------------------------
*/ */
@ -43,8 +43,8 @@ DLNewList(void)
errmsg("out of memory"))); errmsg("out of memory")));
#endif #endif
} }
l->dll_head = 0; l->dll_head = NULL;
l->dll_tail = 0; l->dll_tail = NULL;
return l; return l;
} }
@ -52,8 +52,8 @@ DLNewList(void)
void void
DLInitList(Dllist *list) DLInitList(Dllist *list)
{ {
list->dll_head = 0; list->dll_head = NULL;
list->dll_tail = 0; list->dll_tail = NULL;
} }
/* /*
@ -65,7 +65,7 @@ DLFreeList(Dllist *list)
{ {
Dlelem *curr; Dlelem *curr;
while ((curr = DLRemHead(list)) != 0) while ((curr = DLRemHead(list)) != NULL)
free(curr); free(curr);
free(list); free(list);
@ -88,20 +88,20 @@ DLNewElem(void *val)
errmsg("out of memory"))); errmsg("out of memory")));
#endif #endif
} }
e->dle_next = 0; e->dle_next = NULL;
e->dle_prev = 0; e->dle_prev = NULL;
e->dle_val = val; e->dle_val = val;
e->dle_list = 0; e->dle_list = NULL;
return e; return e;
} }
void void
DLInitElem(Dlelem *e, void *val) DLInitElem(Dlelem *e, void *val)
{ {
e->dle_next = 0; e->dle_next = NULL;
e->dle_prev = 0; e->dle_prev = NULL;
e->dle_val = val; e->dle_val = val;
e->dle_list = 0; e->dle_list = NULL;
} }
void void
@ -132,9 +132,9 @@ DLRemove(Dlelem *e)
l->dll_tail = e->dle_prev; l->dll_tail = e->dle_prev;
} }
e->dle_next = 0; e->dle_next = NULL;
e->dle_prev = 0; e->dle_prev = NULL;
e->dle_list = 0; e->dle_list = NULL;
} }
void void
@ -145,10 +145,10 @@ DLAddHead(Dllist *l, Dlelem *e)
if (l->dll_head) if (l->dll_head)
l->dll_head->dle_prev = e; l->dll_head->dle_prev = e;
e->dle_next = l->dll_head; e->dle_next = l->dll_head;
e->dle_prev = 0; e->dle_prev = NULL;
l->dll_head = e; l->dll_head = e;
if (l->dll_tail == 0) /* if this is first element added */ if (l->dll_tail == NULL) /* if this is first element added */
l->dll_tail = e; l->dll_tail = e;
} }
@ -160,10 +160,10 @@ DLAddTail(Dllist *l, Dlelem *e)
if (l->dll_tail) if (l->dll_tail)
l->dll_tail->dle_next = e; l->dll_tail->dle_next = e;
e->dle_prev = l->dll_tail; e->dle_prev = l->dll_tail;
e->dle_next = 0; e->dle_next = NULL;
l->dll_tail = e; l->dll_tail = e;
if (l->dll_head == 0) /* if this is first element added */ if (l->dll_head == NULL) /* if this is first element added */
l->dll_head = e; l->dll_head = e;
} }
@ -173,19 +173,19 @@ DLRemHead(Dllist *l)
/* remove and return the head */ /* remove and return the head */
Dlelem *result = l->dll_head; Dlelem *result = l->dll_head;
if (result == 0) if (result == NULL)
return result; return result;
if (result->dle_next) if (result->dle_next)
result->dle_next->dle_prev = 0; result->dle_next->dle_prev = NULL;
l->dll_head = result->dle_next; l->dll_head = result->dle_next;
if (result == l->dll_tail) /* if the head is also the tail */ if (result == l->dll_tail) /* if the head is also the tail */
l->dll_tail = 0; l->dll_tail = NULL;
result->dle_next = 0; result->dle_next = NULL;
result->dle_list = 0; result->dle_list = NULL;
return result; return result;
} }
@ -196,19 +196,19 @@ DLRemTail(Dllist *l)
/* remove and return the tail */ /* remove and return the tail */
Dlelem *result = l->dll_tail; Dlelem *result = l->dll_tail;
if (result == 0) if (result == NULL)
return result; return result;
if (result->dle_prev) if (result->dle_prev)
result->dle_prev->dle_next = 0; result->dle_prev->dle_next = NULL;
l->dll_tail = result->dle_prev; l->dll_tail = result->dle_prev;
if (result == l->dll_head) /* if the tail is also the head */ if (result == l->dll_head) /* if the tail is also the head */
l->dll_head = 0; l->dll_head = NULL;
result->dle_prev = 0; result->dle_prev = NULL;
result->dle_list = 0; result->dle_list = NULL;
return result; return result;
} }
@ -222,7 +222,7 @@ DLMoveToFront(Dlelem *e)
if (l->dll_head == e) if (l->dll_head == e)
return; /* Fast path if already at front */ return; /* Fast path if already at front */
Assert(e->dle_prev != 0); /* since it's not the head */ Assert(e->dle_prev != NULL); /* since it's not the head */
e->dle_prev->dle_next = e->dle_next; e->dle_prev->dle_next = e->dle_next;
if (e->dle_next) if (e->dle_next)
@ -236,7 +236,7 @@ DLMoveToFront(Dlelem *e)
l->dll_head->dle_prev = e; l->dll_head->dle_prev = e;
e->dle_next = l->dll_head; e->dle_next = l->dll_head;
e->dle_prev = 0; e->dle_prev = NULL;
l->dll_head = e; l->dll_head = e;
/* We need not check dll_tail, since there must have been > 1 entry */ /* We need not check dll_tail, since there must have been > 1 entry */
} }