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qapi: Change data type of the FOO_lookup generated for enum FOO

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Currently, a FOO_lookup is an array of strings terminated by a NULL
sentinel.

A future patch will generate enums with "holes".  NULL-termination
will cease to work then.

To prepare for that, store the length in the FOO_lookup by wrapping it
in a struct and adding a member for the length.

The sentinel will be dropped next.

Signed-off-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Message-Id: <20170822132255.23945-13-marcandre.lureau@redhat.com>
[Basically redone]
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1503564371-26090-16-git-send-email-armbru@redhat.com>
[Rebased]
This commit is contained in:
Marc-André Lureau 2017-08-24 10:46:10 +02:00 • committed by Markus Armbruster
parent 788b305c91
commit f7abe0ecd4
33 changed files with 106 additions and 89 deletions
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13
scripts/qapi.py
View file

@ -1849,19 +1849,22 @@ def guardend(name):
def gen_enum_lookup(name, values, prefix=None):
ret = mcgen('''
const char *const %(c_name)s_lookup[] = {
const QEnumLookup %(c_name)s_lookup = {
.array = (const char *const[]) {
''',
c_name=c_name(name))
for value in values:
index = c_enum_const(name, value, prefix)
ret += mcgen('''
[%(index)s] = "%(value)s",
[%(index)s] = "%(value)s",
''',
index=index, value=value)
max_index = c_enum_const(name, '_MAX', prefix)
ret += mcgen('''
[%(max_index)s] = NULL,
[%(max_index)s] = NULL,
},
.size = %(max_index)s
};
''',
max_index=max_index)
@ -1895,9 +1898,9 @@ typedef enum %(c_name)s {
ret += mcgen('''
#define %(c_name)s_str(val) \\
qapi_enum_lookup(%(c_name)s_lookup, (val))
qapi_enum_lookup(&%(c_name)s_lookup, (val))
extern const char *const %(c_name)s_lookup[];
extern const QEnumLookup %(c_name)s_lookup;
''',
c_name=c_name(name))
return ret