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Document which type are nullable, and wire format for null value

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Signed-off-by: Ian Douglas Scott <idscott@system76.com>
This commit is contained in:
Ian Douglas Scott 2022-07-12 21:23:55 -07:00
parent 971f8e4ace
commit 60827b862e
2 changed files with 4 additions and 3 deletions
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5
doc/publican/sources/Protocol.xml
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@ -151,7 +151,8 @@
<para> <para>
Starts with an unsigned 32-bit length (including null terminator), Starts with an unsigned 32-bit length (including null terminator),
followed by the string contents, including terminating null byte, followed by the string contents, including terminating null byte,
then padding to a 32-bit boundary. then padding to a 32-bit boundary. A null value is represented
with a length of 0.
</para> </para>
</listitem> </listitem>
</varlistentry> </varlistentry>
@ -159,7 +160,7 @@
<term>object</term> <term>object</term>
<listitem> <listitem>
<para> <para>
32-bit object ID. 32-bit object ID. A null value is represented with an ID of 0.
</para> </para>
</listitem> </listitem>
</varlistentry> </varlistentry>

2
src/wayland-util.h
View file

@ -118,7 +118,7 @@ struct wl_object;
* * `n`: new_id * * `n`: new_id
* * `a`: array * * `a`: array
* * `h`: fd * * `h`: fd
* * `?`: following argument is nullable * * `?`: following argument (`o` or `s`) is nullable
* *
* While demarshaling primitive arguments is straightforward, when demarshaling * While demarshaling primitive arguments is straightforward, when demarshaling
* messages containing `object` or `new_id` arguments, the protocol * messages containing `object` or `new_id` arguments, the protocol