mirror of
https://github.com/yuzu-emu/unicorn.git
synced 2024-12-24 16:55:30 +00:00
00e596aad2
We already documented that qapi names should match specific patterns (such as starting with a letter unless it was an enum value or a downstream extension). Tighten that from a suggestion into a hard requirement, which frees up names beginning with a single underscore for qapi internal usage. The tighter regex doesn't forbid everything insane that a user could provide (for example, a user could name a type 'Foo-lookup' to collide with the generated 'Foo_lookup[]' for an enum 'Foo'), but does a good job at protecting the most obvious uses, and also happens to reserve single leading underscore for later use. The handling of enum values starting with a digit is tricky: commit 9fb081e introduced a subtle bug by using c_name() on a munged value, which would allow an enum to include the member 'q-int' in spite of our reservation. Furthermore, munging with a leading '_' would fail our tighter regex. So fix it by only munging for leading digits (which are never ticklish in c_name()) and by using a different prefix (I picked 'D', although any letter should do). Add new tests, reserved-member-underscore and reserved-enum-q, to demonstrate the tighter checking. Backports commit 59a92feedc6927e0e1ff87fdaccfb4dd42ad4c84 from qemu
1787 lines
59 KiB
Python
1787 lines
59 KiB
Python
#
|
|
# QAPI helper library
|
|
#
|
|
# Copyright IBM, Corp. 2011
|
|
# Copyright (c) 2013-2015 Red Hat Inc.
|
|
#
|
|
# Authors:
|
|
# Anthony Liguori <aliguori@us.ibm.com>
|
|
# Markus Armbruster <armbru@redhat.com>
|
|
#
|
|
# This work is licensed under the terms of the GNU GPL, version 2.
|
|
# See the COPYING file in the top-level directory.
|
|
|
|
import re
|
|
from ordereddict import OrderedDict
|
|
import errno
|
|
import getopt
|
|
import os
|
|
import sys
|
|
import string
|
|
|
|
builtin_types = {
|
|
'str': 'QTYPE_QSTRING',
|
|
'int': 'QTYPE_QINT',
|
|
'number': 'QTYPE_QFLOAT',
|
|
'bool': 'QTYPE_QBOOL',
|
|
'int8': 'QTYPE_QINT',
|
|
'int16': 'QTYPE_QINT',
|
|
'int32': 'QTYPE_QINT',
|
|
'int64': 'QTYPE_QINT',
|
|
'uint8': 'QTYPE_QINT',
|
|
'uint16': 'QTYPE_QINT',
|
|
'uint32': 'QTYPE_QINT',
|
|
'uint64': 'QTYPE_QINT',
|
|
'size': 'QTYPE_QINT',
|
|
'any': None, # any qtype_code possible, actually
|
|
}
|
|
|
|
# Whitelist of commands allowed to return a non-dictionary
|
|
returns_whitelist = [
|
|
# From QMP:
|
|
'human-monitor-command',
|
|
'qom-get',
|
|
'query-migrate-cache-size',
|
|
'query-tpm-models',
|
|
'query-tpm-types',
|
|
'ringbuf-read',
|
|
|
|
# From QGA:
|
|
'guest-file-open',
|
|
'guest-fsfreeze-freeze',
|
|
'guest-fsfreeze-freeze-list',
|
|
'guest-fsfreeze-status',
|
|
'guest-fsfreeze-thaw',
|
|
'guest-get-time',
|
|
'guest-set-vcpus',
|
|
'guest-sync',
|
|
'guest-sync-delimited',
|
|
|
|
# From qapi-schema-test:
|
|
'user_def_cmd3',
|
|
]
|
|
|
|
enum_types = []
|
|
struct_types = []
|
|
union_types = []
|
|
events = []
|
|
all_names = {}
|
|
|
|
#
|
|
# Parsing the schema into expressions
|
|
#
|
|
|
|
|
|
def error_path(parent):
|
|
res = ""
|
|
while parent:
|
|
res = ("In file included from %s:%d:\n" % (parent['file'],
|
|
parent['line'])) + res
|
|
parent = parent['parent']
|
|
return res
|
|
|
|
|
|
class QAPISchemaError(Exception):
|
|
def __init__(self, schema, msg):
|
|
Exception.__init__(self)
|
|
self.fname = schema.fname
|
|
self.msg = msg
|
|
self.col = 1
|
|
self.line = schema.line
|
|
for ch in schema.src[schema.line_pos:schema.pos]:
|
|
if ch == '\t':
|
|
self.col = (self.col + 7) % 8 + 1
|
|
else:
|
|
self.col += 1
|
|
self.info = schema.incl_info
|
|
|
|
def __str__(self):
|
|
return error_path(self.info) + \
|
|
"%s:%d:%d: %s" % (self.fname, self.line, self.col, self.msg)
|
|
|
|
|
|
class QAPIExprError(Exception):
|
|
def __init__(self, expr_info, msg):
|
|
Exception.__init__(self)
|
|
assert expr_info
|
|
self.info = expr_info
|
|
self.msg = msg
|
|
|
|
def __str__(self):
|
|
return error_path(self.info['parent']) + \
|
|
"%s:%d: %s" % (self.info['file'], self.info['line'], self.msg)
|
|
|
|
|
|
class QAPISchemaParser(object):
|
|
|
|
def __init__(self, fp, previously_included=[], incl_info=None):
|
|
abs_fname = os.path.abspath(fp.name)
|
|
fname = fp.name
|
|
self.fname = fname
|
|
previously_included.append(abs_fname)
|
|
self.incl_info = incl_info
|
|
self.src = fp.read()
|
|
if self.src == '' or self.src[-1] != '\n':
|
|
self.src += '\n'
|
|
self.cursor = 0
|
|
self.line = 1
|
|
self.line_pos = 0
|
|
self.exprs = []
|
|
self.accept()
|
|
|
|
while self.tok is not None:
|
|
expr_info = {'file': fname, 'line': self.line,
|
|
'parent': self.incl_info}
|
|
expr = self.get_expr(False)
|
|
if isinstance(expr, dict) and "include" in expr:
|
|
if len(expr) != 1:
|
|
raise QAPIExprError(expr_info,
|
|
"Invalid 'include' directive")
|
|
include = expr["include"]
|
|
if not isinstance(include, str):
|
|
raise QAPIExprError(expr_info,
|
|
"Value of 'include' must be a string")
|
|
incl_abs_fname = os.path.join(os.path.dirname(abs_fname),
|
|
include)
|
|
# catch inclusion cycle
|
|
inf = expr_info
|
|
while inf:
|
|
if incl_abs_fname == os.path.abspath(inf['file']):
|
|
raise QAPIExprError(expr_info, "Inclusion loop for %s"
|
|
% include)
|
|
inf = inf['parent']
|
|
# skip multiple include of the same file
|
|
if incl_abs_fname in previously_included:
|
|
continue
|
|
try:
|
|
fobj = open(incl_abs_fname, 'r')
|
|
except IOError, e:
|
|
raise QAPIExprError(expr_info,
|
|
'%s: %s' % (e.strerror, include))
|
|
exprs_include = QAPISchemaParser(fobj, previously_included,
|
|
expr_info)
|
|
self.exprs.extend(exprs_include.exprs)
|
|
else:
|
|
expr_elem = {'expr': expr,
|
|
'info': expr_info}
|
|
self.exprs.append(expr_elem)
|
|
|
|
def accept(self):
|
|
while True:
|
|
self.tok = self.src[self.cursor]
|
|
self.pos = self.cursor
|
|
self.cursor += 1
|
|
self.val = None
|
|
|
|
if self.tok == '#':
|
|
self.cursor = self.src.find('\n', self.cursor)
|
|
elif self.tok in "{}:,[]":
|
|
return
|
|
elif self.tok == "'":
|
|
string = ''
|
|
esc = False
|
|
while True:
|
|
ch = self.src[self.cursor]
|
|
self.cursor += 1
|
|
if ch == '\n':
|
|
raise QAPISchemaError(self,
|
|
'Missing terminating "\'"')
|
|
if esc:
|
|
if ch == 'b':
|
|
string += '\b'
|
|
elif ch == 'f':
|
|
string += '\f'
|
|
elif ch == 'n':
|
|
string += '\n'
|
|
elif ch == 'r':
|
|
string += '\r'
|
|
elif ch == 't':
|
|
string += '\t'
|
|
elif ch == 'u':
|
|
value = 0
|
|
for _ in range(0, 4):
|
|
ch = self.src[self.cursor]
|
|
self.cursor += 1
|
|
if ch not in "0123456789abcdefABCDEF":
|
|
raise QAPISchemaError(self,
|
|
'\\u escape needs 4 '
|
|
'hex digits')
|
|
value = (value << 4) + int(ch, 16)
|
|
# If Python 2 and 3 didn't disagree so much on
|
|
# how to handle Unicode, then we could allow
|
|
# Unicode string defaults. But most of QAPI is
|
|
# ASCII-only, so we aren't losing much for now.
|
|
if not value or value > 0x7f:
|
|
raise QAPISchemaError(self,
|
|
'For now, \\u escape '
|
|
'only supports non-zero '
|
|
'values up to \\u007f')
|
|
string += chr(value)
|
|
elif ch in "\\/'\"":
|
|
string += ch
|
|
else:
|
|
raise QAPISchemaError(self,
|
|
"Unknown escape \\%s" % ch)
|
|
esc = False
|
|
elif ch == "\\":
|
|
esc = True
|
|
elif ch == "'":
|
|
self.val = string
|
|
return
|
|
else:
|
|
string += ch
|
|
elif self.src.startswith("true", self.pos):
|
|
self.val = True
|
|
self.cursor += 3
|
|
return
|
|
elif self.src.startswith("false", self.pos):
|
|
self.val = False
|
|
self.cursor += 4
|
|
return
|
|
elif self.src.startswith("null", self.pos):
|
|
self.val = None
|
|
self.cursor += 3
|
|
return
|
|
elif self.tok == '\n':
|
|
if self.cursor == len(self.src):
|
|
self.tok = None
|
|
return
|
|
self.line += 1
|
|
self.line_pos = self.cursor
|
|
elif not self.tok.isspace():
|
|
raise QAPISchemaError(self, 'Stray "%s"' % self.tok)
|
|
|
|
def get_members(self):
|
|
expr = OrderedDict()
|
|
if self.tok == '}':
|
|
self.accept()
|
|
return expr
|
|
if self.tok != "'":
|
|
raise QAPISchemaError(self, 'Expected string or "}"')
|
|
while True:
|
|
key = self.val
|
|
self.accept()
|
|
if self.tok != ':':
|
|
raise QAPISchemaError(self, 'Expected ":"')
|
|
self.accept()
|
|
if key in expr:
|
|
raise QAPISchemaError(self, 'Duplicate key "%s"' % key)
|
|
expr[key] = self.get_expr(True)
|
|
if self.tok == '}':
|
|
self.accept()
|
|
return expr
|
|
if self.tok != ',':
|
|
raise QAPISchemaError(self, 'Expected "," or "}"')
|
|
self.accept()
|
|
if self.tok != "'":
|
|
raise QAPISchemaError(self, 'Expected string')
|
|
|
|
def get_values(self):
|
|
expr = []
|
|
if self.tok == ']':
|
|
self.accept()
|
|
return expr
|
|
if self.tok not in "{['tfn":
|
|
raise QAPISchemaError(self, 'Expected "{", "[", "]", string, '
|
|
'boolean or "null"')
|
|
while True:
|
|
expr.append(self.get_expr(True))
|
|
if self.tok == ']':
|
|
self.accept()
|
|
return expr
|
|
if self.tok != ',':
|
|
raise QAPISchemaError(self, 'Expected "," or "]"')
|
|
self.accept()
|
|
|
|
def get_expr(self, nested):
|
|
if self.tok != '{' and not nested:
|
|
raise QAPISchemaError(self, 'Expected "{"')
|
|
if self.tok == '{':
|
|
self.accept()
|
|
expr = self.get_members()
|
|
elif self.tok == '[':
|
|
self.accept()
|
|
expr = self.get_values()
|
|
elif self.tok in "'tfn":
|
|
expr = self.val
|
|
self.accept()
|
|
else:
|
|
raise QAPISchemaError(self, 'Expected "{", "[" or string')
|
|
return expr
|
|
|
|
#
|
|
# Semantic analysis of schema expressions
|
|
# TODO fold into QAPISchema
|
|
# TODO catching name collisions in generated code would be nice
|
|
#
|
|
|
|
|
|
def find_base_fields(base):
|
|
base_struct_define = find_struct(base)
|
|
if not base_struct_define:
|
|
return None
|
|
return base_struct_define['data']
|
|
|
|
|
|
# Return the qtype of an alternate branch, or None on error.
|
|
def find_alternate_member_qtype(qapi_type):
|
|
if qapi_type in builtin_types:
|
|
return builtin_types[qapi_type]
|
|
elif find_struct(qapi_type):
|
|
return "QTYPE_QDICT"
|
|
elif find_enum(qapi_type):
|
|
return "QTYPE_QSTRING"
|
|
elif find_union(qapi_type):
|
|
return "QTYPE_QDICT"
|
|
return None
|
|
|
|
|
|
# Return the discriminator enum define if discriminator is specified as an
|
|
# enum type, otherwise return None.
|
|
def discriminator_find_enum_define(expr):
|
|
base = expr.get('base')
|
|
discriminator = expr.get('discriminator')
|
|
|
|
if not (discriminator and base):
|
|
return None
|
|
|
|
base_fields = find_base_fields(base)
|
|
if not base_fields:
|
|
return None
|
|
|
|
discriminator_type = base_fields.get(discriminator)
|
|
if not discriminator_type:
|
|
return None
|
|
|
|
return find_enum(discriminator_type)
|
|
|
|
|
|
# Names must be letters, numbers, -, and _. They must start with letter,
|
|
# except for downstream extensions which must start with __RFQDN_.
|
|
# Dots are only valid in the downstream extension prefix.
|
|
valid_name = re.compile('^(__[a-zA-Z0-9.-]+_)?'
|
|
'[a-zA-Z][a-zA-Z0-9_-]*$')
|
|
|
|
|
|
def check_name(expr_info, source, name, allow_optional=False,
|
|
enum_member=False):
|
|
global valid_name
|
|
membername = name
|
|
|
|
if not isinstance(name, str):
|
|
raise QAPIExprError(expr_info,
|
|
"%s requires a string name" % source)
|
|
if name.startswith('*'):
|
|
membername = name[1:]
|
|
if not allow_optional:
|
|
raise QAPIExprError(expr_info,
|
|
"%s does not allow optional name '%s'"
|
|
% (source, name))
|
|
# Enum members can start with a digit, because the generated C
|
|
# code always prefixes it with the enum name
|
|
if enum_member and membername[0].isdigit():
|
|
membername = 'D' + membername
|
|
# Reserve the entire 'q_' namespace for c_name()
|
|
if not valid_name.match(membername) or \
|
|
c_name(membername, False).startswith('q_'):
|
|
raise QAPIExprError(expr_info,
|
|
"%s uses invalid name '%s'" % (source, name))
|
|
|
|
|
|
def add_name(name, info, meta, implicit=False):
|
|
global all_names
|
|
check_name(info, "'%s'" % meta, name)
|
|
# FIXME should reject names that differ only in '_' vs. '.'
|
|
# vs. '-', because they're liable to clash in generated C.
|
|
if name in all_names:
|
|
raise QAPIExprError(info,
|
|
"%s '%s' is already defined"
|
|
% (all_names[name], name))
|
|
if not implicit and (name.endswith('Kind') or name.endswith('List')):
|
|
raise QAPIExprError(info,
|
|
"%s '%s' should not end in '%s'"
|
|
% (meta, name, name[-4:]))
|
|
all_names[name] = meta
|
|
|
|
|
|
def add_struct(definition, info):
|
|
global struct_types
|
|
name = definition['struct']
|
|
add_name(name, info, 'struct')
|
|
struct_types.append(definition)
|
|
|
|
|
|
def find_struct(name):
|
|
global struct_types
|
|
for struct in struct_types:
|
|
if struct['struct'] == name:
|
|
return struct
|
|
return None
|
|
|
|
|
|
def add_union(definition, info):
|
|
global union_types
|
|
name = definition['union']
|
|
add_name(name, info, 'union')
|
|
union_types.append(definition)
|
|
|
|
|
|
def find_union(name):
|
|
global union_types
|
|
for union in union_types:
|
|
if union['union'] == name:
|
|
return union
|
|
return None
|
|
|
|
|
|
def add_enum(name, info, enum_values=None, implicit=False):
|
|
global enum_types
|
|
add_name(name, info, 'enum', implicit)
|
|
enum_types.append({"enum_name": name, "enum_values": enum_values})
|
|
|
|
|
|
def find_enum(name):
|
|
global enum_types
|
|
for enum in enum_types:
|
|
if enum['enum_name'] == name:
|
|
return enum
|
|
return None
|
|
|
|
|
|
def is_enum(name):
|
|
return find_enum(name) is not None
|
|
|
|
|
|
def check_type(expr_info, source, value, allow_array=False,
|
|
allow_dict=False, allow_optional=False,
|
|
allow_metas=[]):
|
|
global all_names
|
|
|
|
if value is None:
|
|
return
|
|
|
|
# Check if array type for value is okay
|
|
if isinstance(value, list):
|
|
if not allow_array:
|
|
raise QAPIExprError(expr_info,
|
|
"%s cannot be an array" % source)
|
|
if len(value) != 1 or not isinstance(value[0], str):
|
|
raise QAPIExprError(expr_info,
|
|
"%s: array type must contain single type name"
|
|
% source)
|
|
value = value[0]
|
|
|
|
# Check if type name for value is okay
|
|
if isinstance(value, str):
|
|
if value not in all_names:
|
|
raise QAPIExprError(expr_info,
|
|
"%s uses unknown type '%s'"
|
|
% (source, value))
|
|
if not all_names[value] in allow_metas:
|
|
raise QAPIExprError(expr_info,
|
|
"%s cannot use %s type '%s'"
|
|
% (source, all_names[value], value))
|
|
return
|
|
|
|
if not allow_dict:
|
|
raise QAPIExprError(expr_info,
|
|
"%s should be a type name" % source)
|
|
if not isinstance(value, OrderedDict):
|
|
raise QAPIExprError(expr_info,
|
|
"%s should be a dictionary or type name" % source)
|
|
|
|
# value is a dictionary, check that each member is okay
|
|
for (key, arg) in value.items():
|
|
check_name(expr_info, "Member of %s" % source, key,
|
|
allow_optional=allow_optional)
|
|
if c_name(key, False) == 'u' or c_name(key, False).startswith('has_'):
|
|
raise QAPIExprError(expr_info,
|
|
"Member of %s uses reserved name '%s'"
|
|
% (source, key))
|
|
# Todo: allow dictionaries to represent default values of
|
|
# an optional argument.
|
|
check_type(expr_info, "Member '%s' of %s" % (key, source), arg,
|
|
allow_array=True,
|
|
allow_metas=['built-in', 'union', 'alternate', 'struct',
|
|
'enum'])
|
|
|
|
|
|
def check_member_clash(expr_info, base_name, data, source=""):
|
|
base = find_struct(base_name)
|
|
assert base
|
|
base_members = base['data']
|
|
for key in data.keys():
|
|
if key.startswith('*'):
|
|
key = key[1:]
|
|
if key in base_members or "*" + key in base_members:
|
|
raise QAPIExprError(expr_info,
|
|
"Member name '%s'%s clashes with base '%s'"
|
|
% (key, source, base_name))
|
|
if base.get('base'):
|
|
check_member_clash(expr_info, base['base'], data, source)
|
|
|
|
|
|
def check_command(expr, expr_info):
|
|
name = expr['command']
|
|
|
|
check_type(expr_info, "'data' for command '%s'" % name,
|
|
expr.get('data'), allow_dict=True, allow_optional=True,
|
|
allow_metas=['struct'])
|
|
returns_meta = ['union', 'struct']
|
|
if name in returns_whitelist:
|
|
returns_meta += ['built-in', 'alternate', 'enum']
|
|
check_type(expr_info, "'returns' for command '%s'" % name,
|
|
expr.get('returns'), allow_array=True,
|
|
allow_optional=True, allow_metas=returns_meta)
|
|
|
|
|
|
def check_event(expr, expr_info):
|
|
global events
|
|
name = expr['event']
|
|
|
|
if name.upper() == 'MAX':
|
|
raise QAPIExprError(expr_info, "Event name 'MAX' cannot be created")
|
|
events.append(name)
|
|
check_type(expr_info, "'data' for event '%s'" % name,
|
|
expr.get('data'), allow_dict=True, allow_optional=True,
|
|
allow_metas=['struct'])
|
|
|
|
|
|
def check_union(expr, expr_info):
|
|
name = expr['union']
|
|
base = expr.get('base')
|
|
discriminator = expr.get('discriminator')
|
|
members = expr['data']
|
|
values = {'MAX': '(automatic)'}
|
|
|
|
# Two types of unions, determined by discriminator.
|
|
|
|
# With no discriminator it is a simple union.
|
|
if discriminator is None:
|
|
enum_define = None
|
|
allow_metas = ['built-in', 'union', 'alternate', 'struct', 'enum']
|
|
if base is not None:
|
|
raise QAPIExprError(expr_info,
|
|
"Simple union '%s' must not have a base"
|
|
% name)
|
|
|
|
# Else, it's a flat union.
|
|
else:
|
|
# The object must have a string member 'base'.
|
|
check_type(expr_info, "'base' for union '%s'" % name,
|
|
base, allow_metas=['struct'])
|
|
if not base:
|
|
raise QAPIExprError(expr_info,
|
|
"Flat union '%s' must have a base"
|
|
% name)
|
|
base_fields = find_base_fields(base)
|
|
assert base_fields
|
|
|
|
# The value of member 'discriminator' must name a non-optional
|
|
# member of the base struct.
|
|
check_name(expr_info, "Discriminator of flat union '%s'" % name,
|
|
discriminator)
|
|
discriminator_type = base_fields.get(discriminator)
|
|
if not discriminator_type:
|
|
raise QAPIExprError(expr_info,
|
|
"Discriminator '%s' is not a member of base "
|
|
"struct '%s'"
|
|
% (discriminator, base))
|
|
enum_define = find_enum(discriminator_type)
|
|
allow_metas = ['struct']
|
|
# Do not allow string discriminator
|
|
if not enum_define:
|
|
raise QAPIExprError(expr_info,
|
|
"Discriminator '%s' must be of enumeration "
|
|
"type" % discriminator)
|
|
|
|
# Check every branch
|
|
for (key, value) in members.items():
|
|
check_name(expr_info, "Member of union '%s'" % name, key)
|
|
|
|
# Each value must name a known type; furthermore, in flat unions,
|
|
# branches must be a struct with no overlapping member names
|
|
check_type(expr_info, "Member '%s' of union '%s'" % (key, name),
|
|
value, allow_array=not base, allow_metas=allow_metas)
|
|
if base:
|
|
branch_struct = find_struct(value)
|
|
assert branch_struct
|
|
check_member_clash(expr_info, base, branch_struct['data'],
|
|
" of branch '%s'" % key)
|
|
|
|
# If the discriminator names an enum type, then all members
|
|
# of 'data' must also be members of the enum type.
|
|
if enum_define:
|
|
if key not in enum_define['enum_values']:
|
|
raise QAPIExprError(expr_info,
|
|
"Discriminator value '%s' is not found in "
|
|
"enum '%s'" %
|
|
(key, enum_define["enum_name"]))
|
|
|
|
# Otherwise, check for conflicts in the generated enum
|
|
else:
|
|
c_key = camel_to_upper(key)
|
|
if c_key in values:
|
|
raise QAPIExprError(expr_info,
|
|
"Union '%s' member '%s' clashes with '%s'"
|
|
% (name, key, values[c_key]))
|
|
values[c_key] = key
|
|
|
|
|
|
def check_alternate(expr, expr_info):
|
|
name = expr['alternate']
|
|
members = expr['data']
|
|
values = {'MAX': '(automatic)'}
|
|
types_seen = {}
|
|
|
|
# Check every branch
|
|
for (key, value) in members.items():
|
|
check_name(expr_info, "Member of alternate '%s'" % name, key)
|
|
|
|
# Check for conflicts in the generated enum
|
|
c_key = camel_to_upper(key)
|
|
if c_key in values:
|
|
raise QAPIExprError(expr_info,
|
|
"Alternate '%s' member '%s' clashes with '%s'"
|
|
% (name, key, values[c_key]))
|
|
values[c_key] = key
|
|
|
|
# Ensure alternates have no type conflicts.
|
|
check_type(expr_info, "Member '%s' of alternate '%s'" % (key, name),
|
|
value,
|
|
allow_metas=['built-in', 'union', 'struct', 'enum'])
|
|
qtype = find_alternate_member_qtype(value)
|
|
assert qtype
|
|
if qtype in types_seen:
|
|
raise QAPIExprError(expr_info,
|
|
"Alternate '%s' member '%s' can't "
|
|
"be distinguished from member '%s'"
|
|
% (name, key, types_seen[qtype]))
|
|
types_seen[qtype] = key
|
|
|
|
|
|
def check_enum(expr, expr_info):
|
|
name = expr['enum']
|
|
members = expr.get('data')
|
|
prefix = expr.get('prefix')
|
|
values = {'MAX': '(automatic)'}
|
|
|
|
if not isinstance(members, list):
|
|
raise QAPIExprError(expr_info,
|
|
"Enum '%s' requires an array for 'data'" % name)
|
|
if prefix is not None and not isinstance(prefix, str):
|
|
raise QAPIExprError(expr_info,
|
|
"Enum '%s' requires a string for 'prefix'" % name)
|
|
for member in members:
|
|
check_name(expr_info, "Member of enum '%s'" % name, member,
|
|
enum_member=True)
|
|
key = camel_to_upper(member)
|
|
if key in values:
|
|
raise QAPIExprError(expr_info,
|
|
"Enum '%s' member '%s' clashes with '%s'"
|
|
% (name, member, values[key]))
|
|
values[key] = member
|
|
|
|
|
|
def check_struct(expr, expr_info):
|
|
name = expr['struct']
|
|
members = expr['data']
|
|
|
|
check_type(expr_info, "'data' for struct '%s'" % name, members,
|
|
allow_dict=True, allow_optional=True)
|
|
check_type(expr_info, "'base' for struct '%s'" % name, expr.get('base'),
|
|
allow_metas=['struct'])
|
|
if expr.get('base'):
|
|
check_member_clash(expr_info, expr['base'], expr['data'])
|
|
|
|
|
|
def check_keys(expr_elem, meta, required, optional=[]):
|
|
expr = expr_elem['expr']
|
|
info = expr_elem['info']
|
|
name = expr[meta]
|
|
if not isinstance(name, str):
|
|
raise QAPIExprError(info,
|
|
"'%s' key must have a string value" % meta)
|
|
required = required + [meta]
|
|
for (key, value) in expr.items():
|
|
if key not in required and key not in optional:
|
|
raise QAPIExprError(info,
|
|
"Unknown key '%s' in %s '%s'"
|
|
% (key, meta, name))
|
|
if (key == 'gen' or key == 'success-response') and value is not False:
|
|
raise QAPIExprError(info,
|
|
"'%s' of %s '%s' should only use false value"
|
|
% (key, meta, name))
|
|
for key in required:
|
|
if key not in expr:
|
|
raise QAPIExprError(info,
|
|
"Key '%s' is missing from %s '%s'"
|
|
% (key, meta, name))
|
|
|
|
|
|
def check_exprs(exprs):
|
|
global all_names
|
|
|
|
# Learn the types and check for valid expression keys
|
|
for builtin in builtin_types.keys():
|
|
all_names[builtin] = 'built-in'
|
|
for expr_elem in exprs:
|
|
expr = expr_elem['expr']
|
|
info = expr_elem['info']
|
|
if 'enum' in expr:
|
|
check_keys(expr_elem, 'enum', ['data'], ['prefix'])
|
|
add_enum(expr['enum'], info, expr['data'])
|
|
elif 'union' in expr:
|
|
check_keys(expr_elem, 'union', ['data'],
|
|
['base', 'discriminator'])
|
|
add_union(expr, info)
|
|
elif 'alternate' in expr:
|
|
check_keys(expr_elem, 'alternate', ['data'])
|
|
add_name(expr['alternate'], info, 'alternate')
|
|
elif 'struct' in expr:
|
|
check_keys(expr_elem, 'struct', ['data'], ['base'])
|
|
add_struct(expr, info)
|
|
elif 'command' in expr:
|
|
check_keys(expr_elem, 'command', [],
|
|
['data', 'returns', 'gen', 'success-response'])
|
|
add_name(expr['command'], info, 'command')
|
|
elif 'event' in expr:
|
|
check_keys(expr_elem, 'event', [], ['data'])
|
|
add_name(expr['event'], info, 'event')
|
|
else:
|
|
raise QAPIExprError(expr_elem['info'],
|
|
"Expression is missing metatype")
|
|
|
|
# Try again for hidden UnionKind enum
|
|
for expr_elem in exprs:
|
|
expr = expr_elem['expr']
|
|
if 'union' in expr:
|
|
if not discriminator_find_enum_define(expr):
|
|
add_enum('%sKind' % expr['union'], expr_elem['info'],
|
|
implicit=True)
|
|
elif 'alternate' in expr:
|
|
add_enum('%sKind' % expr['alternate'], expr_elem['info'],
|
|
implicit=True)
|
|
|
|
# Validate that exprs make sense
|
|
for expr_elem in exprs:
|
|
expr = expr_elem['expr']
|
|
info = expr_elem['info']
|
|
|
|
if 'enum' in expr:
|
|
check_enum(expr, info)
|
|
elif 'union' in expr:
|
|
check_union(expr, info)
|
|
elif 'alternate' in expr:
|
|
check_alternate(expr, info)
|
|
elif 'struct' in expr:
|
|
check_struct(expr, info)
|
|
elif 'command' in expr:
|
|
check_command(expr, info)
|
|
elif 'event' in expr:
|
|
check_event(expr, info)
|
|
else:
|
|
assert False, 'unexpected meta type'
|
|
|
|
return exprs
|
|
|
|
#
|
|
# Schema compiler frontend
|
|
#
|
|
|
|
|
|
class QAPISchemaEntity(object):
|
|
def __init__(self, name, info):
|
|
assert isinstance(name, str)
|
|
self.name = name
|
|
# For explicitly defined entities, info points to the (explicit)
|
|
# definition. For builtins (and their arrays), info is None.
|
|
# For implicitly defined entities, info points to a place that
|
|
# triggered the implicit definition (there may be more than one
|
|
# such place).
|
|
self.info = info
|
|
|
|
def c_name(self):
|
|
return c_name(self.name)
|
|
|
|
def check(self, schema):
|
|
pass
|
|
|
|
def is_implicit(self):
|
|
return not self.info
|
|
|
|
def visit(self, visitor):
|
|
pass
|
|
|
|
|
|
class QAPISchemaVisitor(object):
|
|
def visit_begin(self, schema):
|
|
pass
|
|
|
|
def visit_end(self):
|
|
pass
|
|
|
|
def visit_needed(self, entity):
|
|
# Default to visiting everything
|
|
return True
|
|
|
|
def visit_builtin_type(self, name, info, json_type):
|
|
pass
|
|
|
|
def visit_enum_type(self, name, info, values, prefix):
|
|
pass
|
|
|
|
def visit_array_type(self, name, info, element_type):
|
|
pass
|
|
|
|
def visit_object_type(self, name, info, base, members, variants):
|
|
pass
|
|
|
|
def visit_object_type_flat(self, name, info, members, variants):
|
|
pass
|
|
|
|
def visit_alternate_type(self, name, info, variants):
|
|
pass
|
|
|
|
def visit_command(self, name, info, arg_type, ret_type,
|
|
gen, success_response):
|
|
pass
|
|
|
|
def visit_event(self, name, info, arg_type):
|
|
pass
|
|
|
|
|
|
class QAPISchemaType(QAPISchemaEntity):
|
|
def c_type(self, is_param=False):
|
|
return c_name(self.name) + pointer_suffix
|
|
|
|
def c_null(self):
|
|
return 'NULL'
|
|
|
|
def json_type(self):
|
|
pass
|
|
|
|
def alternate_qtype(self):
|
|
json2qtype = {
|
|
'string': 'QTYPE_QSTRING',
|
|
'number': 'QTYPE_QFLOAT',
|
|
'int': 'QTYPE_QINT',
|
|
'boolean': 'QTYPE_QBOOL',
|
|
'object': 'QTYPE_QDICT'
|
|
}
|
|
return json2qtype.get(self.json_type())
|
|
|
|
|
|
class QAPISchemaBuiltinType(QAPISchemaType):
|
|
def __init__(self, name, json_type, c_type, c_null):
|
|
QAPISchemaType.__init__(self, name, None)
|
|
assert not c_type or isinstance(c_type, str)
|
|
assert json_type in ('string', 'number', 'int', 'boolean', 'null',
|
|
'value')
|
|
self._json_type_name = json_type
|
|
self._c_type_name = c_type
|
|
self._c_null_val = c_null
|
|
|
|
def c_name(self):
|
|
return self.name
|
|
|
|
def c_type(self, is_param=False):
|
|
if is_param and self.name == 'str':
|
|
return 'const ' + self._c_type_name
|
|
return self._c_type_name
|
|
|
|
def c_null(self):
|
|
return self._c_null_val
|
|
|
|
def json_type(self):
|
|
return self._json_type_name
|
|
|
|
def visit(self, visitor):
|
|
visitor.visit_builtin_type(self.name, self.info, self.json_type())
|
|
|
|
|
|
class QAPISchemaEnumType(QAPISchemaType):
|
|
def __init__(self, name, info, values, prefix):
|
|
QAPISchemaType.__init__(self, name, info)
|
|
for v in values:
|
|
assert isinstance(v, str)
|
|
assert prefix is None or isinstance(prefix, str)
|
|
self.values = values
|
|
self.prefix = prefix
|
|
|
|
def check(self, schema):
|
|
assert len(set(self.values)) == len(self.values)
|
|
|
|
def is_implicit(self):
|
|
# See QAPISchema._make_implicit_enum_type()
|
|
return self.name.endswith('Kind')
|
|
|
|
def c_type(self, is_param=False):
|
|
return c_name(self.name)
|
|
|
|
def c_null(self):
|
|
return c_enum_const(self.name, (self.values + ['MAX'])[0],
|
|
self.prefix)
|
|
|
|
def json_type(self):
|
|
return 'string'
|
|
|
|
def visit(self, visitor):
|
|
visitor.visit_enum_type(self.name, self.info,
|
|
self.values, self.prefix)
|
|
|
|
|
|
class QAPISchemaArrayType(QAPISchemaType):
|
|
def __init__(self, name, info, element_type):
|
|
QAPISchemaType.__init__(self, name, info)
|
|
assert isinstance(element_type, str)
|
|
self._element_type_name = element_type
|
|
self.element_type = None
|
|
|
|
def check(self, schema):
|
|
self.element_type = schema.lookup_type(self._element_type_name)
|
|
assert self.element_type
|
|
|
|
def is_implicit(self):
|
|
return True
|
|
|
|
def json_type(self):
|
|
return 'array'
|
|
|
|
def visit(self, visitor):
|
|
visitor.visit_array_type(self.name, self.info, self.element_type)
|
|
|
|
|
|
class QAPISchemaObjectType(QAPISchemaType):
|
|
def __init__(self, name, info, base, local_members, variants):
|
|
# struct has local_members, optional base, and no variants
|
|
# flat union has base, variants, and no local_members
|
|
# simple union has local_members, variants, and no base
|
|
QAPISchemaType.__init__(self, name, info)
|
|
assert base is None or isinstance(base, str)
|
|
for m in local_members:
|
|
assert isinstance(m, QAPISchemaObjectTypeMember)
|
|
m.set_owner(name)
|
|
if variants is not None:
|
|
assert isinstance(variants, QAPISchemaObjectTypeVariants)
|
|
variants.set_owner(name)
|
|
self._base_name = base
|
|
self._base_name = base
|
|
self.base = None
|
|
self.local_members = local_members
|
|
self.variants = variants
|
|
self.members = None
|
|
|
|
def check(self, schema):
|
|
assert self.members is not False # not running in cycles
|
|
if self.members:
|
|
return
|
|
self.members = False # mark as being checked
|
|
seen = OrderedDict()
|
|
if self._base_name:
|
|
self.base = schema.lookup_type(self._base_name)
|
|
assert isinstance(self.base, QAPISchemaObjectType)
|
|
self.base.check(schema)
|
|
self.base.check_clash(schema, self.info, seen)
|
|
self.members = seen.values()
|
|
for m in self.local_members:
|
|
m.check(schema)
|
|
m.check_clash(self.info, seen)
|
|
if self.variants:
|
|
self.variants.check(schema, seen)
|
|
assert self.variants.tag_member in self.members
|
|
self.variants.check_clash(schema, self.info, seen)
|
|
|
|
# Check that the members of this type do not cause duplicate JSON fields,
|
|
# and update seen to track the members seen so far. Report any errors
|
|
# on behalf of info, which is not necessarily self.info
|
|
def check_clash(self, schema, info, seen):
|
|
assert not self.variants # not implemented
|
|
for m in self.members:
|
|
m.check_clash(info, seen)
|
|
|
|
def is_implicit(self):
|
|
# See QAPISchema._make_implicit_object_type()
|
|
return self.name[0] == ':'
|
|
|
|
def c_name(self):
|
|
assert not self.is_implicit()
|
|
return QAPISchemaType.c_name(self)
|
|
|
|
def c_type(self, is_param=False):
|
|
assert not self.is_implicit()
|
|
return QAPISchemaType.c_type(self)
|
|
|
|
def json_type(self):
|
|
return 'object'
|
|
|
|
def visit(self, visitor):
|
|
visitor.visit_object_type(self.name, self.info,
|
|
self.base, self.local_members, self.variants)
|
|
visitor.visit_object_type_flat(self.name, self.info,
|
|
self.members, self.variants)
|
|
|
|
|
|
class QAPISchemaObjectTypeMember(object):
|
|
role = 'member'
|
|
|
|
def __init__(self, name, typ, optional):
|
|
assert isinstance(name, str)
|
|
assert isinstance(typ, str)
|
|
assert isinstance(optional, bool)
|
|
self.name = name
|
|
self._type_name = typ
|
|
self.type = None
|
|
self.optional = optional
|
|
self.owner = None
|
|
|
|
def set_owner(self, name):
|
|
assert not self.owner
|
|
self.owner = name
|
|
|
|
def check(self, schema):
|
|
assert self.owner
|
|
self.type = schema.lookup_type(self._type_name)
|
|
assert self.type
|
|
|
|
def check_clash(self, info, seen):
|
|
cname = c_name(self.name)
|
|
if cname in seen:
|
|
raise QAPIExprError(info,
|
|
"%s collides with %s"
|
|
% (self.describe(), seen[cname].describe()))
|
|
seen[cname] = self
|
|
|
|
def _pretty_owner(self):
|
|
owner = self.owner
|
|
if owner.startswith(':obj-'):
|
|
# See QAPISchema._make_implicit_object_type() - reverse the
|
|
# mapping there to create a nice human-readable description
|
|
owner = owner[5:]
|
|
if owner.endswith('-arg'):
|
|
return '(parameter of %s)' % owner[:-4]
|
|
else:
|
|
assert owner.endswith('-wrapper')
|
|
# Unreachable and not implemented
|
|
assert False
|
|
return '(%s of %s)' % (self.role, owner)
|
|
|
|
def describe(self):
|
|
return "'%s' %s" % (self.name, self._pretty_owner())
|
|
|
|
|
|
class QAPISchemaObjectTypeVariants(object):
|
|
def __init__(self, tag_name, tag_member, variants):
|
|
# Flat unions pass tag_name but not tag_member.
|
|
# Simple unions and alternates pass tag_member but not tag_name.
|
|
# After check(), tag_member is always set, and tag_name remains
|
|
# a reliable witness of being used by a flat union.
|
|
assert bool(tag_member) != bool(tag_name)
|
|
assert (isinstance(tag_name, str) or
|
|
isinstance(tag_member, QAPISchemaObjectTypeMember))
|
|
for v in variants:
|
|
assert isinstance(v, QAPISchemaObjectTypeVariant)
|
|
self.tag_name = tag_name
|
|
self.tag_member = tag_member
|
|
self.variants = variants
|
|
|
|
def set_owner(self, name):
|
|
for v in self.variants:
|
|
v.set_owner(name)
|
|
|
|
def check(self, schema, seen):
|
|
if not self.tag_member: # flat union
|
|
self.tag_member = seen[c_name(self.tag_name)]
|
|
assert self.tag_name == self.tag_member.name
|
|
assert isinstance(self.tag_member.type, QAPISchemaEnumType)
|
|
for v in self.variants:
|
|
v.check(schema)
|
|
assert v.name in self.tag_member.type.values
|
|
if isinstance(v.type, QAPISchemaObjectType):
|
|
v.type.check(schema)
|
|
|
|
def check_clash(self, schema, info, seen):
|
|
for v in self.variants:
|
|
# Reset seen map for each variant, since qapi names from one
|
|
# branch do not affect another branch
|
|
assert isinstance(v.type, QAPISchemaObjectType)
|
|
v.type.check_clash(schema, info, dict(seen))
|
|
|
|
|
|
class QAPISchemaObjectTypeVariant(QAPISchemaObjectTypeMember):
|
|
role = 'branch'
|
|
|
|
def __init__(self, name, typ):
|
|
QAPISchemaObjectTypeMember.__init__(self, name, typ, False)
|
|
|
|
# This function exists to support ugly simple union special cases
|
|
# TODO get rid of them, and drop the function
|
|
def simple_union_type(self):
|
|
if (self.type.is_implicit() and
|
|
isinstance(self.type, QAPISchemaObjectType)):
|
|
assert len(self.type.members) == 1
|
|
assert not self.type.variants
|
|
return self.type.members[0].type
|
|
return None
|
|
|
|
|
|
class QAPISchemaAlternateType(QAPISchemaType):
|
|
def __init__(self, name, info, variants):
|
|
QAPISchemaType.__init__(self, name, info)
|
|
assert isinstance(variants, QAPISchemaObjectTypeVariants)
|
|
assert not variants.tag_name
|
|
variants.set_owner(name)
|
|
variants.tag_member.set_owner(self.name)
|
|
self.variants = variants
|
|
|
|
def check(self, schema):
|
|
self.variants.tag_member.check(schema)
|
|
self.variants.check(schema, {})
|
|
|
|
def json_type(self):
|
|
return 'value'
|
|
|
|
def visit(self, visitor):
|
|
visitor.visit_alternate_type(self.name, self.info, self.variants)
|
|
|
|
|
|
class QAPISchemaCommand(QAPISchemaEntity):
|
|
def __init__(self, name, info, arg_type, ret_type, gen, success_response):
|
|
QAPISchemaEntity.__init__(self, name, info)
|
|
assert not arg_type or isinstance(arg_type, str)
|
|
assert not ret_type or isinstance(ret_type, str)
|
|
self._arg_type_name = arg_type
|
|
self.arg_type = None
|
|
self._ret_type_name = ret_type
|
|
self.ret_type = None
|
|
self.gen = gen
|
|
self.success_response = success_response
|
|
|
|
def check(self, schema):
|
|
if self._arg_type_name:
|
|
self.arg_type = schema.lookup_type(self._arg_type_name)
|
|
assert isinstance(self.arg_type, QAPISchemaObjectType)
|
|
assert not self.arg_type.variants # not implemented
|
|
if self._ret_type_name:
|
|
self.ret_type = schema.lookup_type(self._ret_type_name)
|
|
assert isinstance(self.ret_type, QAPISchemaType)
|
|
|
|
def visit(self, visitor):
|
|
visitor.visit_command(self.name, self.info,
|
|
self.arg_type, self.ret_type,
|
|
self.gen, self.success_response)
|
|
|
|
|
|
class QAPISchemaEvent(QAPISchemaEntity):
|
|
def __init__(self, name, info, arg_type):
|
|
QAPISchemaEntity.__init__(self, name, info)
|
|
assert not arg_type or isinstance(arg_type, str)
|
|
self._arg_type_name = arg_type
|
|
self.arg_type = None
|
|
|
|
def check(self, schema):
|
|
if self._arg_type_name:
|
|
self.arg_type = schema.lookup_type(self._arg_type_name)
|
|
assert isinstance(self.arg_type, QAPISchemaObjectType)
|
|
assert not self.arg_type.variants # not implemented
|
|
|
|
def visit(self, visitor):
|
|
visitor.visit_event(self.name, self.info, self.arg_type)
|
|
|
|
|
|
class QAPISchema(object):
|
|
def __init__(self, fname):
|
|
try:
|
|
self.exprs = check_exprs(QAPISchemaParser(open(fname, "r")).exprs)
|
|
self._entity_dict = {}
|
|
self._predefining = True
|
|
self._def_predefineds()
|
|
self._predefining = False
|
|
self._def_exprs()
|
|
self.check()
|
|
except (QAPISchemaError, QAPIExprError), err:
|
|
print >>sys.stderr, err
|
|
exit(1)
|
|
|
|
def _def_entity(self, ent):
|
|
# Only the predefined types are allowed to not have info
|
|
assert ent.info or self._predefining
|
|
assert ent.name not in self._entity_dict
|
|
self._entity_dict[ent.name] = ent
|
|
|
|
def lookup_entity(self, name, typ=None):
|
|
ent = self._entity_dict.get(name)
|
|
if typ and not isinstance(ent, typ):
|
|
return None
|
|
return ent
|
|
|
|
def lookup_type(self, name):
|
|
return self.lookup_entity(name, QAPISchemaType)
|
|
|
|
def _def_builtin_type(self, name, json_type, c_type, c_null):
|
|
self._def_entity(QAPISchemaBuiltinType(name, json_type,
|
|
c_type, c_null))
|
|
# TODO As long as we have QAPI_TYPES_BUILTIN to share multiple
|
|
# qapi-types.h from a single .c, all arrays of builtins must be
|
|
# declared in the first file whether or not they are used. Nicer
|
|
# would be to use lazy instantiation, while figuring out how to
|
|
# avoid compilation issues with multiple qapi-types.h.
|
|
self._make_array_type(name, None)
|
|
|
|
def _def_predefineds(self):
|
|
for t in [('str', 'string', 'char' + pointer_suffix, 'NULL'),
|
|
('number', 'number', 'double', '0'),
|
|
('int', 'int', 'int64_t', '0'),
|
|
('int8', 'int', 'int8_t', '0'),
|
|
('int16', 'int', 'int16_t', '0'),
|
|
('int32', 'int', 'int32_t', '0'),
|
|
('int64', 'int', 'int64_t', '0'),
|
|
('uint8', 'int', 'uint8_t', '0'),
|
|
('uint16', 'int', 'uint16_t', '0'),
|
|
('uint32', 'int', 'uint32_t', '0'),
|
|
('uint64', 'int', 'uint64_t', '0'),
|
|
('size', 'int', 'uint64_t', '0'),
|
|
('bool', 'boolean', 'bool', 'false'),
|
|
('any', 'value', 'QObject' + pointer_suffix, 'NULL')]:
|
|
self._def_builtin_type(*t)
|
|
self.the_empty_object_type = QAPISchemaObjectType(':empty', None, None,
|
|
[], None)
|
|
self._def_entity(self.the_empty_object_type)
|
|
|
|
def _make_implicit_enum_type(self, name, info, values):
|
|
name = name + 'Kind' # Use namespace reserved by add_name()
|
|
self._def_entity(QAPISchemaEnumType(name, info, values, None))
|
|
return name
|
|
|
|
def _make_array_type(self, element_type, info):
|
|
name = element_type + 'List' # Use namespace reserved by add_name()
|
|
if not self.lookup_type(name):
|
|
self._def_entity(QAPISchemaArrayType(name, info, element_type))
|
|
return name
|
|
|
|
def _make_implicit_object_type(self, name, info, role, members):
|
|
if not members:
|
|
return None
|
|
# See also QAPISchemaObjectTypeMember._pretty_owner()
|
|
name = ':obj-%s-%s' % (name, role)
|
|
if not self.lookup_entity(name, QAPISchemaObjectType):
|
|
self._def_entity(QAPISchemaObjectType(name, info, None,
|
|
members, None))
|
|
return name
|
|
|
|
def _def_enum_type(self, expr, info):
|
|
name = expr['enum']
|
|
data = expr['data']
|
|
prefix = expr.get('prefix')
|
|
self._def_entity(QAPISchemaEnumType(name, info, data, prefix))
|
|
|
|
def _make_member(self, name, typ, info):
|
|
optional = False
|
|
if name.startswith('*'):
|
|
name = name[1:]
|
|
optional = True
|
|
if isinstance(typ, list):
|
|
assert len(typ) == 1
|
|
typ = self._make_array_type(typ[0], info)
|
|
return QAPISchemaObjectTypeMember(name, typ, optional)
|
|
|
|
def _make_members(self, data, info):
|
|
return [self._make_member(key, value, info)
|
|
for (key, value) in data.iteritems()]
|
|
|
|
def _def_struct_type(self, expr, info):
|
|
name = expr['struct']
|
|
base = expr.get('base')
|
|
data = expr['data']
|
|
self._def_entity(QAPISchemaObjectType(name, info, base,
|
|
self._make_members(data, info),
|
|
None))
|
|
|
|
def _make_variant(self, case, typ):
|
|
return QAPISchemaObjectTypeVariant(case, typ)
|
|
|
|
def _make_simple_variant(self, case, typ, info):
|
|
if isinstance(typ, list):
|
|
assert len(typ) == 1
|
|
typ = self._make_array_type(typ[0], info)
|
|
typ = self._make_implicit_object_type(
|
|
typ, info, 'wrapper', [self._make_member('data', typ, info)])
|
|
return QAPISchemaObjectTypeVariant(case, typ)
|
|
|
|
def _make_implicit_tag(self, type_name, info, variants):
|
|
typ = self._make_implicit_enum_type(type_name, info,
|
|
[v.name for v in variants])
|
|
return QAPISchemaObjectTypeMember('type', typ, False)
|
|
|
|
def _def_union_type(self, expr, info):
|
|
name = expr['union']
|
|
data = expr['data']
|
|
base = expr.get('base')
|
|
tag_name = expr.get('discriminator')
|
|
tag_member = None
|
|
if tag_name:
|
|
variants = [self._make_variant(key, value)
|
|
for (key, value) in data.iteritems()]
|
|
members = []
|
|
else:
|
|
variants = [self._make_simple_variant(key, value, info)
|
|
for (key, value) in data.iteritems()]
|
|
tag_member = self._make_implicit_tag(name, info, variants)
|
|
members = [tag_member]
|
|
self._def_entity(
|
|
QAPISchemaObjectType(name, info, base, members,
|
|
QAPISchemaObjectTypeVariants(tag_name,
|
|
tag_member,
|
|
variants)))
|
|
|
|
def _def_alternate_type(self, expr, info):
|
|
name = expr['alternate']
|
|
data = expr['data']
|
|
variants = [self._make_variant(key, value)
|
|
for (key, value) in data.iteritems()]
|
|
tag_member = self._make_implicit_tag(name, info, variants)
|
|
self._def_entity(
|
|
QAPISchemaAlternateType(name, info,
|
|
QAPISchemaObjectTypeVariants(None,
|
|
tag_member,
|
|
variants)))
|
|
|
|
def _def_command(self, expr, info):
|
|
name = expr['command']
|
|
data = expr.get('data')
|
|
rets = expr.get('returns')
|
|
gen = expr.get('gen', True)
|
|
success_response = expr.get('success-response', True)
|
|
if isinstance(data, OrderedDict):
|
|
data = self._make_implicit_object_type(
|
|
name, info, 'arg', self._make_members(data, info))
|
|
if isinstance(rets, list):
|
|
assert len(rets) == 1
|
|
rets = self._make_array_type(rets[0], info)
|
|
self._def_entity(QAPISchemaCommand(name, info, data, rets, gen,
|
|
success_response))
|
|
|
|
def _def_event(self, expr, info):
|
|
name = expr['event']
|
|
data = expr.get('data')
|
|
if isinstance(data, OrderedDict):
|
|
data = self._make_implicit_object_type(
|
|
name, info, 'arg', self._make_members(data, info))
|
|
self._def_entity(QAPISchemaEvent(name, info, data))
|
|
|
|
def _def_exprs(self):
|
|
for expr_elem in self.exprs:
|
|
expr = expr_elem['expr']
|
|
info = expr_elem['info']
|
|
if 'enum' in expr:
|
|
self._def_enum_type(expr, info)
|
|
elif 'struct' in expr:
|
|
self._def_struct_type(expr, info)
|
|
elif 'union' in expr:
|
|
self._def_union_type(expr, info)
|
|
elif 'alternate' in expr:
|
|
self._def_alternate_type(expr, info)
|
|
elif 'command' in expr:
|
|
self._def_command(expr, info)
|
|
elif 'event' in expr:
|
|
self._def_event(expr, info)
|
|
else:
|
|
assert False
|
|
|
|
def check(self):
|
|
for ent in self._entity_dict.values():
|
|
ent.check(self)
|
|
|
|
def visit(self, visitor):
|
|
visitor.visit_begin(self)
|
|
for (name, entity) in sorted(self._entity_dict.items()):
|
|
if visitor.visit_needed(entity):
|
|
entity.visit(visitor)
|
|
visitor.visit_end()
|
|
|
|
#
|
|
# Code generation helpers
|
|
#
|
|
|
|
def camel_case(name):
|
|
new_name = ''
|
|
first = True
|
|
for ch in name:
|
|
if ch in ['_', '-']:
|
|
first = True
|
|
elif first:
|
|
new_name += ch.upper()
|
|
first = False
|
|
else:
|
|
new_name += ch.lower()
|
|
return new_name
|
|
|
|
# ENUMName -> ENUM_NAME, EnumName1 -> ENUM_NAME1
|
|
# ENUM_NAME -> ENUM_NAME, ENUM_NAME1 -> ENUM_NAME1, ENUM_Name2 -> ENUM_NAME2
|
|
# ENUM24_Name -> ENUM24_NAME
|
|
def camel_to_upper(value):
|
|
c_fun_str = c_name(value, False)
|
|
if value.isupper():
|
|
return c_fun_str
|
|
|
|
new_name = ''
|
|
l = len(c_fun_str)
|
|
for i in range(l):
|
|
c = c_fun_str[i]
|
|
# When c is upper and no "_" appears before, do more checks
|
|
if c.isupper() and (i > 0) and c_fun_str[i - 1] != "_":
|
|
if i < l - 1 and c_fun_str[i + 1].islower():
|
|
new_name += '_'
|
|
elif c_fun_str[i - 1].isdigit():
|
|
new_name += '_'
|
|
new_name += c
|
|
return new_name.lstrip('_').upper()
|
|
|
|
|
|
def c_enum_const(type_name, const_name, prefix=None):
|
|
if prefix is not None:
|
|
type_name = prefix
|
|
return camel_to_upper(type_name + '_' + const_name)
|
|
|
|
c_name_trans = string.maketrans('.-', '__')
|
|
|
|
|
|
# Map @name to a valid C identifier.
|
|
# If @protect, avoid returning certain ticklish identifiers (like
|
|
# C keywords) by prepending "q_".
|
|
#
|
|
# Used for converting 'name' from a 'name':'type' qapi definition
|
|
# into a generated struct member, as well as converting type names
|
|
# into substrings of a generated C function name.
|
|
# '__a.b_c' -> '__a_b_c', 'x-foo' -> 'x_foo'
|
|
# protect=True: 'int' -> 'q_int'; protect=False: 'int' -> 'int'
|
|
def c_name(name, protect=True):
|
|
# ANSI X3J11/88-090, 3.1.1
|
|
c89_words = set(['auto', 'break', 'case', 'char', 'const', 'continue',
|
|
'default', 'do', 'double', 'else', 'enum', 'extern',
|
|
'float', 'for', 'goto', 'if', 'int', 'long', 'register',
|
|
'return', 'short', 'signed', 'sizeof', 'static',
|
|
'struct', 'switch', 'typedef', 'union', 'unsigned',
|
|
'void', 'volatile', 'while'])
|
|
# ISO/IEC 9899:1999, 6.4.1
|
|
c99_words = set(['inline', 'restrict', '_Bool', '_Complex', '_Imaginary'])
|
|
# ISO/IEC 9899:2011, 6.4.1
|
|
c11_words = set(['_Alignas', '_Alignof', '_Atomic', '_Generic',
|
|
'_Noreturn', '_Static_assert', '_Thread_local'])
|
|
# GCC http://gcc.gnu.org/onlinedocs/gcc-4.7.1/gcc/C-Extensions.html
|
|
# excluding _.*
|
|
gcc_words = set(['asm', 'typeof'])
|
|
# C++ ISO/IEC 14882:2003 2.11
|
|
cpp_words = set(['bool', 'catch', 'class', 'const_cast', 'delete',
|
|
'dynamic_cast', 'explicit', 'false', 'friend', 'mutable',
|
|
'namespace', 'new', 'operator', 'private', 'protected',
|
|
'public', 'reinterpret_cast', 'static_cast', 'template',
|
|
'this', 'throw', 'true', 'try', 'typeid', 'typename',
|
|
'using', 'virtual', 'wchar_t',
|
|
# alternative representations
|
|
'and', 'and_eq', 'bitand', 'bitor', 'compl', 'not',
|
|
'not_eq', 'or', 'or_eq', 'xor', 'xor_eq'])
|
|
# namespace pollution:
|
|
polluted_words = set(['unix', 'errno'])
|
|
name = name.translate(c_name_trans)
|
|
if protect and (name in c89_words | c99_words | c11_words | gcc_words
|
|
| cpp_words | polluted_words):
|
|
return "q_" + name
|
|
return name
|
|
|
|
eatspace = '\033EATSPACE.'
|
|
pointer_suffix = ' *' + eatspace
|
|
|
|
|
|
def genindent(count):
|
|
ret = ""
|
|
for _ in range(count):
|
|
ret += " "
|
|
return ret
|
|
|
|
indent_level = 0
|
|
|
|
|
|
def push_indent(indent_amount=4):
|
|
global indent_level
|
|
indent_level += indent_amount
|
|
|
|
|
|
def pop_indent(indent_amount=4):
|
|
global indent_level
|
|
indent_level -= indent_amount
|
|
|
|
|
|
# Generate @code with @kwds interpolated.
|
|
# Obey indent_level, and strip eatspace.
|
|
def cgen(code, **kwds):
|
|
raw = code % kwds
|
|
if indent_level:
|
|
indent = genindent(indent_level)
|
|
# re.subn() lacks flags support before Python 2.7, use re.compile()
|
|
raw = re.subn(re.compile("^.", re.MULTILINE),
|
|
indent + r'\g<0>', raw)
|
|
raw = raw[0]
|
|
return re.sub(re.escape(eatspace) + ' *', '', raw)
|
|
|
|
|
|
def mcgen(code, **kwds):
|
|
if code[0] == '\n':
|
|
code = code[1:]
|
|
return cgen(code, **kwds)
|
|
|
|
|
|
def guardname(filename):
|
|
return c_name(filename, protect=False).upper()
|
|
|
|
|
|
def guardstart(name):
|
|
return mcgen('''
|
|
|
|
#ifndef %(name)s
|
|
#define %(name)s
|
|
|
|
''',
|
|
name=guardname(name))
|
|
|
|
|
|
def guardend(name):
|
|
return mcgen('''
|
|
|
|
#endif /* %(name)s */
|
|
|
|
''',
|
|
name=guardname(name))
|
|
|
|
|
|
def gen_enum_lookup(name, values, prefix=None):
|
|
ret = mcgen('''
|
|
|
|
const char *const %(c_name)s_lookup[] = {
|
|
''',
|
|
c_name=c_name(name))
|
|
for value in values:
|
|
index = c_enum_const(name, value, prefix)
|
|
ret += mcgen('''
|
|
"%(value)s",
|
|
''',
|
|
value=value)
|
|
|
|
# Unicorn: We don't use C99 [ARRAY_INDICING] = Thing because
|
|
# MSVC is still in the stone-age with this part of C compiler
|
|
# support.
|
|
max_index = c_enum_const(name, 'MAX', prefix)
|
|
ret += mcgen('''
|
|
NULL,
|
|
};
|
|
''')
|
|
|
|
return ret
|
|
|
|
|
|
def gen_enum(name, values, prefix=None):
|
|
# append automatically generated _MAX value
|
|
enum_values = values + ['MAX']
|
|
ret = mcgen('''
|
|
|
|
typedef enum %(c_name)s {
|
|
''',
|
|
c_name=c_name(name))
|
|
|
|
i = 0
|
|
for value in enum_values:
|
|
ret += mcgen('''
|
|
%(c_enum)s = %(i)d,
|
|
''',
|
|
c_enum=c_enum_const(name, value, prefix),
|
|
i=i)
|
|
i += 1
|
|
|
|
ret += mcgen('''
|
|
} %(c_name)s;
|
|
''',
|
|
c_name=c_name(name))
|
|
|
|
ret += mcgen('''
|
|
extern const char *const %(c_name)s_lookup[];
|
|
''',
|
|
c_name=c_name(name))
|
|
return ret
|
|
|
|
|
|
def gen_params(arg_type, extra):
|
|
if not arg_type:
|
|
return extra
|
|
assert not arg_type.variants
|
|
ret = ''
|
|
sep = ''
|
|
for memb in arg_type.members:
|
|
ret += sep
|
|
sep = ', '
|
|
if memb.optional:
|
|
ret += 'bool has_%s, ' % c_name(memb.name)
|
|
ret += '%s %s' % (memb.type.c_type(is_param=True), c_name(memb.name))
|
|
if extra:
|
|
ret += sep + extra
|
|
return ret
|
|
|
|
|
|
def gen_err_check(label='out', skiperr=False):
|
|
if skiperr:
|
|
return ''
|
|
return mcgen('''
|
|
if (err) {
|
|
goto %(label)s;
|
|
}
|
|
''',
|
|
label=label)
|
|
|
|
|
|
def gen_visit_fields(members, prefix='', need_cast=False, skiperr=False):
|
|
ret = ''
|
|
if skiperr:
|
|
errparg = 'NULL'
|
|
else:
|
|
errparg = '&err'
|
|
|
|
for memb in members:
|
|
if memb.optional:
|
|
ret += mcgen('''
|
|
visit_optional(v, &%(prefix)shas_%(c_name)s, "%(name)s", %(errp)s);
|
|
''',
|
|
prefix=prefix, c_name=c_name(memb.name),
|
|
name=memb.name, errp=errparg)
|
|
ret += gen_err_check(skiperr=skiperr)
|
|
ret += mcgen('''
|
|
if (%(prefix)shas_%(c_name)s) {
|
|
''',
|
|
prefix=prefix, c_name=c_name(memb.name))
|
|
push_indent()
|
|
|
|
# Ugly: sometimes we need to cast away const
|
|
if need_cast and memb.type.name == 'str':
|
|
cast = '(char **)'
|
|
else:
|
|
cast = ''
|
|
|
|
ret += mcgen('''
|
|
visit_type_%(c_type)s(v, %(cast)s&%(prefix)s%(c_name)s, "%(name)s", %(errp)s);
|
|
''',
|
|
c_type=memb.type.c_name(), prefix=prefix, cast=cast,
|
|
c_name=c_name(memb.name), name=memb.name,
|
|
errp=errparg)
|
|
ret += gen_err_check(skiperr=skiperr)
|
|
|
|
if memb.optional:
|
|
pop_indent()
|
|
ret += mcgen('''
|
|
}
|
|
''')
|
|
return ret
|
|
|
|
#
|
|
# Common command line parsing
|
|
#
|
|
|
|
|
|
def parse_command_line(extra_options="", extra_long_options=[]):
|
|
|
|
try:
|
|
opts, args = getopt.gnu_getopt(sys.argv[1:],
|
|
"chp:o:" + extra_options,
|
|
["source", "header", "prefix=",
|
|
"output-dir="] + extra_long_options)
|
|
except getopt.GetoptError, err:
|
|
print >>sys.stderr, "%s: %s" % (sys.argv[0], str(err))
|
|
sys.exit(1)
|
|
|
|
output_dir = ""
|
|
prefix = ""
|
|
do_c = False
|
|
do_h = False
|
|
extra_opts = []
|
|
|
|
for oa in opts:
|
|
o, a = oa
|
|
if o in ("-p", "--prefix"):
|
|
match = re.match('([A-Za-z_.-][A-Za-z0-9_.-]*)?', a)
|
|
if match.end() != len(a):
|
|
print >>sys.stderr, \
|
|
"%s: 'funny character '%s' in argument of --prefix" \
|
|
% (sys.argv[0], a[match.end()])
|
|
sys.exit(1)
|
|
prefix = a
|
|
elif o in ("-o", "--output-dir"):
|
|
output_dir = a + "/"
|
|
elif o in ("-c", "--source"):
|
|
do_c = True
|
|
elif o in ("-h", "--header"):
|
|
do_h = True
|
|
else:
|
|
extra_opts.append(oa)
|
|
|
|
if not do_c and not do_h:
|
|
do_c = True
|
|
do_h = True
|
|
|
|
if len(args) != 1:
|
|
print >>sys.stderr, "%s: need exactly one argument" % sys.argv[0]
|
|
sys.exit(1)
|
|
fname = args[0]
|
|
|
|
return (fname, output_dir, do_c, do_h, prefix, extra_opts)
|
|
|
|
#
|
|
# Generate output files with boilerplate
|
|
#
|
|
|
|
|
|
def open_output(output_dir, do_c, do_h, prefix, c_file, h_file,
|
|
c_comment, h_comment):
|
|
guard = guardname(prefix + h_file)
|
|
c_file = output_dir + prefix + c_file
|
|
h_file = output_dir + prefix + h_file
|
|
|
|
if output_dir:
|
|
try:
|
|
os.makedirs(output_dir)
|
|
except os.error, e:
|
|
if e.errno != errno.EEXIST:
|
|
raise
|
|
|
|
def maybe_open(really, name, opt):
|
|
if really:
|
|
return open(name, opt)
|
|
else:
|
|
import StringIO
|
|
return StringIO.StringIO()
|
|
|
|
fdef = maybe_open(do_c, c_file, 'w')
|
|
fdecl = maybe_open(do_h, h_file, 'w')
|
|
|
|
fdef.write(mcgen('''
|
|
/* AUTOMATICALLY GENERATED, DO NOT MODIFY */
|
|
%(comment)s
|
|
''',
|
|
comment=c_comment))
|
|
|
|
fdecl.write(mcgen('''
|
|
/* AUTOMATICALLY GENERATED, DO NOT MODIFY */
|
|
%(comment)s
|
|
#ifndef %(guard)s
|
|
#define %(guard)s
|
|
|
|
''',
|
|
comment=h_comment, guard=guard))
|
|
|
|
return (fdef, fdecl)
|
|
|
|
|
|
def close_output(fdef, fdecl):
|
|
fdecl.write('''
|
|
#endif
|
|
''')
|
|
fdecl.close()
|
|
fdef.close()
|
|
|