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tolerate NULL pointers at some places

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This commit is contained in:
drochner 2005-07-06 17:17:15 +00:00
parent 45ec6e4557
commit e0d7e15c44
2 changed files with 13 additions and 8 deletions
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13
lib/libc/stdlib/insque.c
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@ -28,7 +28,7 @@
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: insque.c,v 1.1 2005/07/06 14:43:24 drochner Exp $");
__RCSID("$NetBSD: insque.c,v 1.2 2005/07/06 17:17:15 drochner Exp $");
#endif /* LIBC_SCCS and not lint */
#include <assert.h>
@ -48,10 +48,13 @@ insque(entry, pred)
struct qelem *p = (struct qelem *) pred;
_DIAGASSERT(e != 0);
_DIAGASSERT(p != 0);
e->q_forw = p->q_forw;
e->q_back = p;
p->q_forw->q_back = e;
p->q_forw = e;
if (p) {
e->q_forw = p->q_forw;
if (p->q_forw)
p->q_forw->q_back = e;
p->q_forw = e;
} else
e->q_forw = 0;
}

8
lib/libc/stdlib/remque.c
View File

@ -28,7 +28,7 @@
#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
__RCSID("$NetBSD: remque.c,v 1.1 2005/07/06 14:43:24 drochner Exp $");
__RCSID("$NetBSD: remque.c,v 1.2 2005/07/06 17:17:15 drochner Exp $");
#endif /* LIBC_SCCS and not lint */
#include <assert.h>
@ -47,6 +47,8 @@ remque(element)
_DIAGASSERT(e != 0);
e->q_forw->q_back = e->q_back;
e->q_back->q_forw = e->q_forw;
if (e->q_forw)
e->q_forw->q_back = e->q_back;
if (e->q_back)
e->q_back->q_forw = e->q_forw;
}