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The cbug memcpy functions now accept a NULL pointer to a chain - and return

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B_BAD_VALUE instead of just crashing in this case.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3776 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
Axel Dörfler
2003-07-01 00:05:27 +00:00
parent 9391f0a552
commit 43e64c6219
1 changed files with 12 additions and 0 deletions
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src/kernel/core/cbuf.c
+12
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@@ -335,6 +335,9 @@ cbuf_memcpy_to_chain(cbuf *chain, size_t offset, const void *_source, size_t len
char *source = (char *)_source;
int bufferOffset;
if (chain == NULL)
return B_BAD_VALUE;
if ((chain->flags & CBUF_FLAG_CHAIN_HEAD) == 0) {
dprintf("cbuf_memcpy_to_chain: chain at %p not head\n", chain);
return B_BAD_VALUE;
@@ -394,6 +397,9 @@ cbuf_user_memcpy_to_chain(cbuf *chain, size_t offset, const void *_source, size_
int bufferOffset;
int err;
if (chain == NULL)
return B_BAD_VALUE;
if ((chain->flags & CBUF_FLAG_CHAIN_HEAD) == 0) {
dprintf("cbuf_memcpy_to_chain: chain at %p not head\n", chain);
return B_BAD_VALUE;
@@ -454,6 +460,9 @@ cbuf_memcpy_from_chain(void *_dest, cbuf *chain, size_t offset, size_t length)
char *dest = (char *)_dest;
int bufferOffset;
if (chain == NULL)
return B_BAD_VALUE;
if ((chain->flags & CBUF_FLAG_CHAIN_HEAD) == 0) {
dprintf("cbuf_memcpy_from_chain: chain at %p not head\n", chain);
return B_BAD_VALUE;
@@ -512,6 +521,9 @@ cbuf_user_memcpy_from_chain(void *_dest, cbuf *chain, size_t offset, size_t leng
int bufferOffset;
int err;
if (chain == NULL)
return B_BAD_VALUE;
if ((chain->flags & CBUF_FLAG_CHAIN_HEAD) == 0) {
dprintf("cbuf_memcpy_from_chain: chain at %p not head\n", chain);
return B_BAD_VALUE;