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qapi: De-duplicate enum code generation 

Duplicated in commit 21cd70d.  Yes, we can't import qapi-types, but
that's no excuse.  Move the helpers from qapi-types.py to qapi.py, and
replace the duplicates in qapi-event.py.

The generated event enumeration type's lookup table becomes
const-correct (see commit 2e4450f), and uses explicit indexes instead
of relying on order (see commit 912ae9c).

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Message-Id: <1442401589-24189-10-git-send-email-armbru@redhat.com>
Reviewed-by: Daniel P. Berrange <berrange@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Markus Armbruster 2015-09-16 13:06:12 +02:00
parent ee44602857
commit efd2eaa6c2
4 changed files with 64 additions and 122 deletions
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9
docs/qapi-code-gen.txt
View File

@ -829,9 +829,9 @@ Example:
QDECREF(qmp);
}
const char *example_QAPIEvent_lookup[] = {
"MY_EVENT",
NULL,
const char *const example_QAPIEvent_lookup[] = {
[EXAMPLE_QAPI_EVENT_MY_EVENT] = "MY_EVENT",
[EXAMPLE_QAPI_EVENT_MAX] = NULL,
};
$ cat qapi-generated/example-qapi-event.h
[Uninteresting stuff omitted...]
@ -846,10 +846,11 @@ Example:
void qapi_event_send_my_event(Error **errp);
extern const char *example_QAPIEvent_lookup[];
typedef enum example_QAPIEvent {
EXAMPLE_QAPI_EVENT_MY_EVENT = 0,
EXAMPLE_QAPI_EVENT_MAX = 1,
} example_QAPIEvent;
extern const char *const example_QAPIEvent_lookup[];
#endif

67
scripts/qapi-event.py
View File

@ -153,63 +153,6 @@ def generate_event_implement(api_name, event_name, params):
return ret
# Following are the functions that generate an enum type for all defined
# events, similar to qapi-types.py. Here we already have enum name and
# values which were generated before and recorded in event_enum_*. It also
# works around the issue that "import qapi-types" can't work.
def generate_event_enum_decl(event_enum_name, event_enum_values):
lookup_decl = mcgen('''
extern const char *%(event_enum_name)s_lookup[];
''',
event_enum_name = event_enum_name)
enum_decl = mcgen('''
typedef enum %(event_enum_name)s {
''',
event_enum_name = event_enum_name)
# append automatically generated _MAX value
enum_max_value = c_enum_const(event_enum_name, "MAX")
enum_values = event_enum_values + [ enum_max_value ]
i = 0
for value in enum_values:
enum_decl += mcgen('''
%(value)s = %(i)d,
''',
value = value,
i = i)
i += 1
enum_decl += mcgen('''
} %(event_enum_name)s;
''',
event_enum_name = event_enum_name)
return lookup_decl + enum_decl
def generate_event_enum_lookup(event_enum_name, event_enum_strings):
ret = mcgen('''
const char *%(event_enum_name)s_lookup[] = {
''',
event_enum_name = event_enum_name)
for string in event_enum_strings:
ret += mcgen('''
"%(string)s",
''',
string = string)
ret += mcgen('''
NULL,
};
''')
return ret
(input_file, output_dir, do_c, do_h, prefix, dummy) = parse_command_line()
c_comment = '''
@ -266,8 +209,7 @@ fdecl.write(mcgen('''
exprs = QAPISchema(input_file).get_exprs()
event_enum_name = c_name(prefix + "QAPIEvent", protect=False)
event_enum_values = []
event_enum_strings = []
event_names = []
for expr in exprs:
if expr.has_key('event'):
@ -286,12 +228,11 @@ for expr in exprs:
fdef.write(ret)
# Record it, and generate enum later
event_enum_values.append(event_enum_value)
event_enum_strings.append(event_name)
event_names.append(event_name)
ret = generate_event_enum_decl(event_enum_name, event_enum_values)
ret = generate_enum(event_enum_name, event_names)
fdecl.write(ret)
ret = generate_event_enum_lookup(event_enum_name, event_enum_strings)
ret = generate_enum_lookup(event_enum_name, event_names)
fdef.write(ret)
close_output(fdef, fdecl)

55
scripts/qapi-types.py
View File

@ -80,61 +80,6 @@ struct %(name)s {
return ret
def generate_enum_lookup(name, values, prefix=None):
ret = mcgen('''
const char *const %(name)s_lookup[] = {
''',
name=c_name(name))
for value in values:
index = c_enum_const(name, value, prefix)
ret += mcgen('''
[%(index)s] = "%(value)s",
''',
index = index, value = value)
max_index = c_enum_const(name, 'MAX', prefix)
ret += mcgen('''
[%(max_index)s] = NULL,
};
''',
max_index=max_index)
return ret
def generate_enum(name, values, prefix=None):
name = c_name(name)
lookup_decl = mcgen('''
extern const char *const %(name)s_lookup[];
''',
name=name)
enum_decl = mcgen('''
typedef enum %(name)s {
''',
name=name)
# append automatically generated _MAX value
enum_values = values + [ 'MAX' ]
i = 0
for value in enum_values:
enum_full_value = c_enum_const(name, value, prefix)
enum_decl += mcgen('''
%(enum_full_value)s = %(i)d,
''',
enum_full_value = enum_full_value,
i=i)
i += 1
enum_decl += mcgen('''
} %(name)s;
''',
name=name)
return enum_decl + lookup_decl
def gen_alternate_qtypes_decl(name):
return mcgen('''

55
scripts/qapi.py
View File

@ -1498,6 +1498,61 @@ def guardend(name):
''',
name=guardname(name))
def generate_enum_lookup(name, values, prefix=None):
ret = mcgen('''
const char *const %(name)s_lookup[] = {
''',
name=c_name(name))
for value in values:
index = c_enum_const(name, value, prefix)
ret += mcgen('''
[%(index)s] = "%(value)s",
''',
index = index, value = value)
max_index = c_enum_const(name, 'MAX', prefix)
ret += mcgen('''
[%(max_index)s] = NULL,
};
''',
max_index=max_index)
return ret
def generate_enum(name, values, prefix=None):
name = c_name(name)
lookup_decl = mcgen('''
extern const char *const %(name)s_lookup[];
''',
name=name)
enum_decl = mcgen('''
typedef enum %(name)s {
''',
name=name)
# append automatically generated _MAX value
enum_values = values + [ 'MAX' ]
i = 0
for value in enum_values:
enum_full_value = c_enum_const(name, value, prefix)
enum_decl += mcgen('''
%(enum_full_value)s = %(i)d,
''',
enum_full_value = enum_full_value,
i=i)
i += 1
enum_decl += mcgen('''
} %(name)s;
''',
name=name)
return enum_decl + lookup_decl
#
# Common command line parsing
#