| # |
| # 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', |
| } |
| |
| # Whitelist of commands allowed to return a non-dictionary |
| returns_whitelist = [ |
| # From QMP: |
| 'human-monitor-command', |
| '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): |
| 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): |
| 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 QAPISchema: |
| |
| 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 != 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, |
| 'Expected a file name (string), got: %s' |
| % include) |
| 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 = QAPISchema(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 x 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 not self.tok 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 |
| # |
| |
| 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 builtin_types.has_key(qapi_type): |
| 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) |
| |
| valid_name = re.compile('^[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: |
| membername = '_' + membername |
| if not valid_name.match(membername): |
| 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) |
| if name in all_names: |
| raise QAPIExprError(info, |
| "%s '%s' is already defined" |
| % (all_names[name], name)) |
| if not implicit and name[-4:] == 'Kind': |
| raise QAPIExprError(info, |
| "%s '%s' should not end in 'Kind'" |
| % (meta, name)) |
| 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) != None |
| |
| def check_type(expr_info, source, value, allow_array = False, |
| allow_dict = False, allow_optional = False, |
| allow_star = False, allow_metas = []): |
| global all_names |
| orig_value = value |
| |
| if value is None: |
| return |
| |
| if allow_star and value == '**': |
| 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] |
| orig_value = "array of %s" %value |
| |
| # Check if type name for value is okay |
| if isinstance(value, str): |
| if value == '**': |
| raise QAPIExprError(expr_info, |
| "%s uses '**' but did not request 'gen':false" |
| % source) |
| if not value in all_names: |
| raise QAPIExprError(expr_info, |
| "%s uses unknown type '%s'" |
| % (source, orig_value)) |
| if not all_names[value] in allow_metas: |
| raise QAPIExprError(expr_info, |
| "%s cannot use %s type '%s'" |
| % (source, all_names[value], orig_value)) |
| return |
| |
| # value is a dictionary, check that each member is okay |
| if not isinstance(value, OrderedDict): |
| raise QAPIExprError(expr_info, |
| "%s should be a dictionary" % source) |
| if not allow_dict: |
| raise QAPIExprError(expr_info, |
| "%s should be a type name" % source) |
| for (key, arg) in value.items(): |
| check_name(expr_info, "Member of %s" % source, key, |
| allow_optional=allow_optional) |
| # 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_star=allow_star, |
| 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'] |
| allow_star = expr.has_key('gen') |
| |
| check_type(expr_info, "'data' for command '%s'" % name, |
| expr.get('data'), allow_dict=True, allow_optional=True, |
| allow_metas=['union', 'struct'], allow_star=allow_star) |
| 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_dict=True, |
| allow_optional=True, allow_metas=returns_meta, |
| allow_star=allow_star) |
| |
| def check_event(expr, expr_info): |
| global events |
| name = expr['event'] |
| params = expr.get('data') |
| |
| 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=['union', 'struct']) |
| |
| def check_union(expr, expr_info): |
| name = expr['union'] |
| base = expr.get('base') |
| discriminator = expr.get('discriminator') |
| members = expr['data'] |
| values = { 'MAX': '(automatic)' } |
| |
| # If the object has a member 'base', its value must name a struct, |
| # and there must be a discriminator. |
| if base is not None: |
| if discriminator is None: |
| raise QAPIExprError(expr_info, |
| "Union '%s' requires a discriminator to go " |
| "along with base" %name) |
| |
| # 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'. |
| if not isinstance(base, str): |
| raise QAPIExprError(expr_info, |
| "Flat union '%s' must have a string base field" |
| % name) |
| base_fields = find_base_fields(base) |
| if not base_fields: |
| raise QAPIExprError(expr_info, |
| "Base '%s' is not a valid struct" |
| % base) |
| |
| # 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 not key 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') |
| values = { 'MAX': '(automatic)' } |
| |
| if not isinstance(members, list): |
| raise QAPIExprError(expr_info, |
| "Enum '%s' requires an array for 'data'" % 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 not key in required and not key in optional: |
| raise QAPIExprError(info, |
| "Unknown key '%s' in %s '%s'" |
| % (key, meta, name)) |
| if (key == 'gen' or key == 'success-response') and value != False: |
| raise QAPIExprError(info, |
| "'%s' of %s '%s' should only use false value" |
| % (key, meta, name)) |
| for key in required: |
| if not expr.has_key(key): |
| 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 expr.has_key('enum'): |
| check_keys(expr_elem, 'enum', ['data']) |
| add_enum(expr['enum'], info, expr['data']) |
| elif expr.has_key('union'): |
| check_keys(expr_elem, 'union', ['data'], |
| ['base', 'discriminator']) |
| add_union(expr, info) |
| elif expr.has_key('alternate'): |
| check_keys(expr_elem, 'alternate', ['data']) |
| add_name(expr['alternate'], info, 'alternate') |
| elif expr.has_key('struct'): |
| check_keys(expr_elem, 'struct', ['data'], ['base']) |
| add_struct(expr, info) |
| elif expr.has_key('command'): |
| check_keys(expr_elem, 'command', [], |
| ['data', 'returns', 'gen', 'success-response']) |
| add_name(expr['command'], info, 'command') |
| elif expr.has_key('event'): |
| 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 expr.has_key('union'): |
| if not discriminator_find_enum_define(expr): |
| add_enum('%sKind' % expr['union'], expr_elem['info'], |
| implicit=True) |
| elif expr.has_key('alternate'): |
| 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 expr.has_key('enum'): |
| check_enum(expr, info) |
| elif expr.has_key('union'): |
| check_union(expr, info) |
| elif expr.has_key('alternate'): |
| check_alternate(expr, info) |
| elif expr.has_key('struct'): |
| check_struct(expr, info) |
| elif expr.has_key('command'): |
| check_command(expr, info) |
| elif expr.has_key('event'): |
| check_event(expr, info) |
| else: |
| assert False, 'unexpected meta type' |
| |
| return map(lambda expr_elem: expr_elem['expr'], exprs) |
| |
| def parse_schema(fname): |
| try: |
| schema = QAPISchema(open(fname, "r")) |
| return check_exprs(schema.exprs) |
| except (QAPISchemaError, QAPIExprError), e: |
| print >>sys.stderr, e |
| exit(1) |
| |
| # |
| # Code generation helpers |
| # |
| |
| def parse_args(typeinfo): |
| if isinstance(typeinfo, str): |
| struct = find_struct(typeinfo) |
| assert struct != None |
| typeinfo = struct['data'] |
| |
| for member in typeinfo: |
| argname = member |
| argentry = typeinfo[member] |
| optional = False |
| if member.startswith('*'): |
| argname = member[1:] |
| optional = True |
| # Todo: allow argentry to be OrderedDict, for providing the |
| # value of an optional argument. |
| yield (argname, argentry, optional) |
| |
| 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] != "_": |
| # Case 1: next string is lower |
| # Case 2: previous string is digit |
| if (i < (l - 1) and c_fun_str[i + 1].islower()) or \ |
| c_fun_str[i - 1].isdigit(): |
| new_name += '_' |
| new_name += c |
| return new_name.lstrip('_').upper() |
| |
| def c_enum_const(type_name, const_name): |
| 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']) |
| if protect and (name in c89_words | c99_words | c11_words | gcc_words | cpp_words | polluted_words): |
| return "q_" + name |
| return name.translate(c_name_trans) |
| |
| # Map type @name to the C typedef name for the list form. |
| # |
| # ['Name'] -> 'NameList', ['x-Foo'] -> 'x_FooList', ['int'] -> 'intList' |
| def c_list_type(name): |
| return type_name(name) + 'List' |
| |
| # Map type @value to the C typedef form. |
| # |
| # Used for converting 'type' from a 'member':'type' qapi definition |
| # into the alphanumeric portion of the type for a generated C parameter, |
| # as well as generated C function names. See c_type() for the rest of |
| # the conversion such as adding '*' on pointer types. |
| # 'int' -> 'int', '[x-Foo]' -> 'x_FooList', '__a.b_c' -> '__a_b_c' |
| def type_name(value): |
| if type(value) == list: |
| return c_list_type(value[0]) |
| if value in builtin_types.keys(): |
| return value |
| return c_name(value) |
| |
| eatspace = '\033EATSPACE.' |
| pointer_suffix = ' *' + eatspace |
| |
| # Map type @name to its C type expression. |
| # If @is_param, const-qualify the string type. |
| # |
| # This function is used for computing the full C type of 'member':'name'. |
| # A special suffix is added in c_type() for pointer types, and it's |
| # stripped in mcgen(). So please notice this when you check the return |
| # value of c_type() outside mcgen(). |
| def c_type(value, is_param=False): |
| if value == 'str': |
| if is_param: |
| return 'const char' + pointer_suffix |
| return 'char' + pointer_suffix |
| |
| elif value == 'int': |
| return 'int64_t' |
| elif (value == 'int8' or value == 'int16' or value == 'int32' or |
| value == 'int64' or value == 'uint8' or value == 'uint16' or |
| value == 'uint32' or value == 'uint64'): |
| return value + '_t' |
| elif value == 'size': |
| return 'uint64_t' |
| elif value == 'bool': |
| return 'bool' |
| elif value == 'number': |
| return 'double' |
| elif type(value) == list: |
| return c_list_type(value[0]) + pointer_suffix |
| elif is_enum(value): |
| return c_name(value) |
| elif value == None: |
| return 'void' |
| elif value in events: |
| return camel_case(value) + 'Event' + pointer_suffix |
| else: |
| # complex type name |
| assert isinstance(value, str) and value != "" |
| return c_name(value) + pointer_suffix |
| |
| def is_c_ptr(value): |
| return c_type(value).endswith(pointer_suffix) |
| |
| def genindent(count): |
| ret = "" |
| for i 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 |
| |
| def cgen(code, **kwds): |
| indent = genindent(indent_level) |
| lines = code.split('\n') |
| lines = map(lambda x: indent + x, lines) |
| return '\n'.join(lines) % kwds + '\n' |
| |
| def mcgen(code, **kwds): |
| raw = cgen('\n'.join(code.split('\n')[1:-1]), **kwds) |
| return re.sub(re.escape(eatspace) + ' *', '', raw) |
| |
| def basename(filename): |
| return filename.split("/")[-1] |
| |
| def guardname(filename): |
| guard = basename(filename).rsplit(".", 1)[0] |
| for substr in [".", " ", "-"]: |
| guard = guard.replace(substr, "_") |
| return guard.upper() + '_H' |
| |
| 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)) |
| |
| # |
| # 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"): |
| 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): |
| c_file = output_dir + prefix + c_file |
| h_file = output_dir + prefix + h_file |
| |
| 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 = guardname(h_file))) |
| |
| return (fdef, fdecl) |
| |
| def close_output(fdef, fdecl): |
| fdecl.write(''' |
| #endif |
| ''') |
| fdecl.close() |
| fdef.close() |
