[Libvir] Patch: Fix documentation and code of virGetDomain function

[Jim Meyering]

Mark McLoughlin <markmc at redhat.com> wrote:
> On Wed, 2007-02-28 at 16:24 +0000, Richard W.M. Jones wrote:
>>  virGetDomain(virConnectPtr conn, const char *name, const unsigned char *uuid) {
>>      virDomainPtr ret = NULL;
>>
>> -    if ((!VIR_IS_CONNECT(conn)) || ((name == NULL) && (uuid == NULL)) ||
>> +    if ((!VIR_IS_CONNECT(conn)) || (name == NULL) || (uuid == NULL) ||
>
> 	Need the same fix in virGetNetwork()
>
> 	(And DV obviously has a parenthesis fetish ... I don't know what's
> wrong with:
>
>     if (!VIR_IS_CONNECT(conn) || !name || !uuid || !conn->hashes->mux)
>
> 	:-)

Heh :-)
Though using 'uuid == NULL' can be seen as more readable than "!uuid"
in that it tells the reader "uuid" is not an integer.

In Coreutils, I use this rule to keep at least one class of useless
parens at bay:

# Avoid useless parentheses like those in this example:
# #if defined (SYMBOL) || defined (SYM2)
sc_useless_cpp_parens:
	@grep -n '^# *if .*defined *(' $$($(CVS_LIST_EXCEPT)) &&	\
	  { echo '$(ME): found useless parentheses in cpp directive'	\
		1>&2; exit 1; } || :