fa110c6a9e
When we introduced the QAPISchema intermediate representation (commit
ac88219a6c), we took a shortcut: we left check_exprs() & friends
alone instead of moving semantic checks into the
QAPISchemaFOO.check(). The .check() assert check_exprs() did its job.
Time to finish the conversion job. Move exactly the context-sensitive
checks to the .check(). They replace assertions there. Context-free
checks stay put.
Fixes the misleading optional tag error demonstrated by test
flat-union-optional-discriminator.
A few other error message improve.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-Id: <20190927134639.4284-17-armbru@redhat.com>
2589 lines
87 KiB
Python
2589 lines
87 KiB
Python
#
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# QAPI helper library
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#
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# Copyright IBM, Corp. 2011
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# Copyright (c) 2013-2018 Red Hat Inc.
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#
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# Authors:
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# Anthony Liguori <aliguori@us.ibm.com>
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# Markus Armbruster <armbru@redhat.com>
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#
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# This work is licensed under the terms of the GNU GPL, version 2.
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# See the COPYING file in the top-level directory.
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from __future__ import print_function
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from contextlib import contextmanager
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import copy
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import errno
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import os
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import re
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import string
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import sys
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from collections import OrderedDict
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# Are documentation comments required?
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doc_required = False
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# Whitelist of commands allowed to return a non-dictionary
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returns_whitelist = []
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# Whitelist of entities allowed to violate case conventions
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name_case_whitelist = []
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#
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# Parsing the schema into expressions
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#
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class QAPISourceInfo(object):
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def __init__(self, fname, line, parent):
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self.fname = fname
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self.line = line
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self.parent = parent
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self.defn_meta = None
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self.defn_name = None
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def set_defn(self, meta, name):
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self.defn_meta = meta
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self.defn_name = name
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def next_line(self):
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info = copy.copy(self)
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info.line += 1
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return info
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def loc(self):
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return '%s:%d' % (self.fname, self.line)
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def in_defn(self):
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if self.defn_name:
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return "%s: In %s '%s':\n" % (self.fname,
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self.defn_meta, self.defn_name)
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return ''
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def include_path(self):
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ret = ''
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parent = self.parent
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while parent:
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ret = 'In file included from %s:\n' % parent.loc() + ret
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parent = parent.parent
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return ret
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def __str__(self):
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return self.include_path() + self.in_defn() + self.loc()
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class QAPIError(Exception):
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def __init__(self, info, col, msg):
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Exception.__init__(self)
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self.info = info
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self.col = col
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self.msg = msg
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def __str__(self):
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loc = str(self.info)
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if self.col is not None:
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assert self.info.line is not None
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loc += ':%s' % self.col
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return loc + ': ' + self.msg
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class QAPIParseError(QAPIError):
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def __init__(self, parser, msg):
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col = 1
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for ch in parser.src[parser.line_pos:parser.pos]:
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if ch == '\t':
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col = (col + 7) % 8 + 1
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else:
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col += 1
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QAPIError.__init__(self, parser.info, col, msg)
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class QAPISemError(QAPIError):
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def __init__(self, info, msg):
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QAPIError.__init__(self, info, None, msg)
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class QAPIDoc(object):
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"""
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A documentation comment block, either definition or free-form
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Definition documentation blocks consist of
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* a body section: one line naming the definition, followed by an
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overview (any number of lines)
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* argument sections: a description of each argument (for commands
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and events) or member (for structs, unions and alternates)
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* features sections: a description of each feature flag
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* additional (non-argument) sections, possibly tagged
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Free-form documentation blocks consist only of a body section.
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"""
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class Section(object):
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def __init__(self, name=None):
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# optional section name (argument/member or section name)
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self.name = name
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# the list of lines for this section
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self.text = ''
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def append(self, line):
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self.text += line.rstrip() + '\n'
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class ArgSection(Section):
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def __init__(self, name):
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QAPIDoc.Section.__init__(self, name)
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self.member = None
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def connect(self, member):
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self.member = member
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def __init__(self, parser, info):
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# self._parser is used to report errors with QAPIParseError. The
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# resulting error position depends on the state of the parser.
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# It happens to be the beginning of the comment. More or less
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# servicable, but action at a distance.
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self._parser = parser
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self.info = info
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self.symbol = None
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self.body = QAPIDoc.Section()
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# dict mapping parameter name to ArgSection
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self.args = OrderedDict()
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self.features = OrderedDict()
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# a list of Section
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self.sections = []
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# the current section
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self._section = self.body
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self._append_line = self._append_body_line
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def has_section(self, name):
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"""Return True if we have a section with this name."""
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for i in self.sections:
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if i.name == name:
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return True
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return False
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def append(self, line):
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"""
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Parse a comment line and add it to the documentation.
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The way that the line is dealt with depends on which part of
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the documentation we're parsing right now:
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* The body section: ._append_line is ._append_body_line
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* An argument section: ._append_line is ._append_args_line
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* A features section: ._append_line is ._append_features_line
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* An additional section: ._append_line is ._append_various_line
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"""
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line = line[1:]
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if not line:
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self._append_freeform(line)
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return
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if line[0] != ' ':
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raise QAPIParseError(self._parser, "missing space after #")
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line = line[1:]
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self._append_line(line)
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def end_comment(self):
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self._end_section()
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@staticmethod
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def _is_section_tag(name):
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return name in ('Returns:', 'Since:',
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# those are often singular or plural
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'Note:', 'Notes:',
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'Example:', 'Examples:',
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'TODO:')
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def _append_body_line(self, line):
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"""
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Process a line of documentation text in the body section.
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If this a symbol line and it is the section's first line, this
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is a definition documentation block for that symbol.
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If it's a definition documentation block, another symbol line
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begins the argument section for the argument named by it, and
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a section tag begins an additional section. Start that
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section and append the line to it.
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Else, append the line to the current section.
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"""
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name = line.split(' ', 1)[0]
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# FIXME not nice: things like '# @foo:' and '# @foo: ' aren't
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# recognized, and get silently treated as ordinary text
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if not self.symbol and not self.body.text and line.startswith('@'):
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if not line.endswith(':'):
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raise QAPIParseError(self._parser, "line should end with ':'")
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self.symbol = line[1:-1]
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# FIXME invalid names other than the empty string aren't flagged
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if not self.symbol:
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raise QAPIParseError(self._parser, "invalid name")
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elif self.symbol:
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# This is a definition documentation block
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if name.startswith('@') and name.endswith(':'):
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self._append_line = self._append_args_line
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self._append_args_line(line)
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elif line == 'Features:':
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self._append_line = self._append_features_line
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elif self._is_section_tag(name):
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self._append_line = self._append_various_line
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self._append_various_line(line)
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else:
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self._append_freeform(line.strip())
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else:
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# This is a free-form documentation block
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self._append_freeform(line.strip())
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def _append_args_line(self, line):
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"""
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Process a line of documentation text in an argument section.
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A symbol line begins the next argument section, a section tag
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section or a non-indented line after a blank line begins an
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additional section. Start that section and append the line to
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it.
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Else, append the line to the current section.
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"""
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name = line.split(' ', 1)[0]
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if name.startswith('@') and name.endswith(':'):
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line = line[len(name)+1:]
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self._start_args_section(name[1:-1])
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elif self._is_section_tag(name):
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self._append_line = self._append_various_line
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self._append_various_line(line)
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return
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elif (self._section.text.endswith('\n\n')
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and line and not line[0].isspace()):
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if line == 'Features:':
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self._append_line = self._append_features_line
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else:
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self._start_section()
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self._append_line = self._append_various_line
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self._append_various_line(line)
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return
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self._append_freeform(line.strip())
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def _append_features_line(self, line):
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name = line.split(' ', 1)[0]
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if name.startswith('@') and name.endswith(':'):
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line = line[len(name)+1:]
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self._start_features_section(name[1:-1])
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elif self._is_section_tag(name):
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self._append_line = self._append_various_line
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self._append_various_line(line)
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return
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elif (self._section.text.endswith('\n\n')
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and line and not line[0].isspace()):
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self._start_section()
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self._append_line = self._append_various_line
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self._append_various_line(line)
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return
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self._append_freeform(line.strip())
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def _append_various_line(self, line):
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"""
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Process a line of documentation text in an additional section.
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A symbol line is an error.
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A section tag begins an additional section. Start that
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section and append the line to it.
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Else, append the line to the current section.
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"""
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name = line.split(' ', 1)[0]
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if name.startswith('@') and name.endswith(':'):
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raise QAPIParseError(self._parser,
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"'%s' can't follow '%s' section"
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% (name, self.sections[0].name))
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elif self._is_section_tag(name):
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line = line[len(name)+1:]
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self._start_section(name[:-1])
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if (not self._section.name or
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not self._section.name.startswith('Example')):
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line = line.strip()
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self._append_freeform(line)
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def _start_symbol_section(self, symbols_dict, name):
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# FIXME invalid names other than the empty string aren't flagged
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if not name:
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raise QAPIParseError(self._parser, "invalid parameter name")
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if name in symbols_dict:
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raise QAPIParseError(self._parser,
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"'%s' parameter name duplicated" % name)
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assert not self.sections
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self._end_section()
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self._section = QAPIDoc.ArgSection(name)
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symbols_dict[name] = self._section
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def _start_args_section(self, name):
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self._start_symbol_section(self.args, name)
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def _start_features_section(self, name):
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self._start_symbol_section(self.features, name)
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def _start_section(self, name=None):
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if name in ('Returns', 'Since') and self.has_section(name):
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raise QAPIParseError(self._parser,
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"duplicated '%s' section" % name)
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self._end_section()
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self._section = QAPIDoc.Section(name)
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self.sections.append(self._section)
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def _end_section(self):
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if self._section:
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text = self._section.text = self._section.text.strip()
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if self._section.name and (not text or text.isspace()):
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raise QAPIParseError(
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self._parser,
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"empty doc section '%s'" % self._section.name)
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self._section = None
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def _append_freeform(self, line):
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match = re.match(r'(@\S+:)', line)
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if match:
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raise QAPIParseError(self._parser,
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"'%s' not allowed in free-form documentation"
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% match.group(1))
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self._section.append(line)
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def connect_member(self, member):
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if member.name not in self.args:
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# Undocumented TODO outlaw
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self.args[member.name] = QAPIDoc.ArgSection(member.name)
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self.args[member.name].connect(member)
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def check_expr(self, expr):
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if self.has_section('Returns') and 'command' not in expr:
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raise QAPISemError(self.info,
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"'Returns:' is only valid for commands")
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def check(self):
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bogus = [name for name, section in self.args.items()
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if not section.member]
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if bogus:
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raise QAPISemError(
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self.info,
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"the following documented members are not in "
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"the declaration: %s" % ", ".join(bogus))
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class QAPISchemaParser(object):
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def __init__(self, fp, previously_included=[], incl_info=None):
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self.fname = fp.name
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previously_included.append(os.path.abspath(fp.name))
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self.src = fp.read()
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if self.src == '' or self.src[-1] != '\n':
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self.src += '\n'
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self.cursor = 0
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self.info = QAPISourceInfo(self.fname, 1, incl_info)
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self.line_pos = 0
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self.exprs = []
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self.docs = []
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self.accept()
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cur_doc = None
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while self.tok is not None:
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info = self.info
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if self.tok == '#':
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self.reject_expr_doc(cur_doc)
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cur_doc = self.get_doc(info)
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self.docs.append(cur_doc)
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continue
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expr = self.get_expr(False)
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if 'include' in expr:
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self.reject_expr_doc(cur_doc)
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if len(expr) != 1:
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raise QAPISemError(info, "invalid 'include' directive")
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include = expr['include']
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if not isinstance(include, str):
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raise QAPISemError(info,
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"value of 'include' must be a string")
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incl_fname = os.path.join(os.path.dirname(self.fname),
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include)
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self.exprs.append({'expr': {'include': incl_fname},
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'info': info})
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exprs_include = self._include(include, info, incl_fname,
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previously_included)
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if exprs_include:
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self.exprs.extend(exprs_include.exprs)
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self.docs.extend(exprs_include.docs)
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elif "pragma" in expr:
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self.reject_expr_doc(cur_doc)
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if len(expr) != 1:
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raise QAPISemError(info, "invalid 'pragma' directive")
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pragma = expr['pragma']
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if not isinstance(pragma, dict):
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raise QAPISemError(
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info, "value of 'pragma' must be an object")
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for name, value in pragma.items():
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self._pragma(name, value, info)
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else:
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expr_elem = {'expr': expr,
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'info': info}
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if cur_doc:
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if not cur_doc.symbol:
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raise QAPISemError(
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cur_doc.info, "definition documentation required")
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expr_elem['doc'] = cur_doc
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self.exprs.append(expr_elem)
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cur_doc = None
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self.reject_expr_doc(cur_doc)
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@staticmethod
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def reject_expr_doc(doc):
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if doc and doc.symbol:
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raise QAPISemError(
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doc.info,
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"documentation for '%s' is not followed by the definition"
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% doc.symbol)
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def _include(self, include, info, incl_fname, previously_included):
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incl_abs_fname = os.path.abspath(incl_fname)
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# catch inclusion cycle
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inf = info
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while inf:
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if incl_abs_fname == os.path.abspath(inf.fname):
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raise QAPISemError(info, "inclusion loop for %s" % include)
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inf = inf.parent
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# skip multiple include of the same file
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if incl_abs_fname in previously_included:
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return None
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try:
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if sys.version_info[0] >= 3:
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fobj = open(incl_fname, 'r', encoding='utf-8')
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else:
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fobj = open(incl_fname, 'r')
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except IOError as e:
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raise QAPISemError(info, "%s: %s" % (e.strerror, incl_fname))
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return QAPISchemaParser(fobj, previously_included, info)
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def _pragma(self, name, value, info):
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global doc_required, returns_whitelist, name_case_whitelist
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if name == 'doc-required':
|
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if not isinstance(value, bool):
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raise QAPISemError(info,
|
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"pragma 'doc-required' must be boolean")
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doc_required = value
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elif name == 'returns-whitelist':
|
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if (not isinstance(value, list)
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or any([not isinstance(elt, str) for elt in value])):
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raise QAPISemError(
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info,
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"pragma returns-whitelist must be a list of strings")
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returns_whitelist = value
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elif name == 'name-case-whitelist':
|
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if (not isinstance(value, list)
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or any([not isinstance(elt, str) for elt in value])):
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raise QAPISemError(
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info,
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"pragma name-case-whitelist must be a list of strings")
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name_case_whitelist = value
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else:
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raise QAPISemError(info, "unknown pragma '%s'" % name)
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def accept(self, skip_comment=True):
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while True:
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self.tok = self.src[self.cursor]
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self.pos = self.cursor
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self.cursor += 1
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self.val = None
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|
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if self.tok == '#':
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if self.src[self.cursor] == '#':
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# Start of doc comment
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skip_comment = False
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self.cursor = self.src.find('\n', self.cursor)
|
|
if not skip_comment:
|
|
self.val = self.src[self.pos:self.cursor]
|
|
return
|
|
elif self.tok in '{}:,[]':
|
|
return
|
|
elif self.tok == "'":
|
|
# Note: we accept only printable ASCII
|
|
string = ''
|
|
esc = False
|
|
while True:
|
|
ch = self.src[self.cursor]
|
|
self.cursor += 1
|
|
if ch == '\n':
|
|
raise QAPIParseError(self, "missing terminating \"'\"")
|
|
if esc:
|
|
# Note: we recognize only \\ because we have
|
|
# no use for funny characters in strings
|
|
if ch != '\\':
|
|
raise QAPIParseError(self,
|
|
"unknown escape \\%s" % ch)
|
|
esc = False
|
|
elif ch == '\\':
|
|
esc = True
|
|
continue
|
|
elif ch == "'":
|
|
self.val = string
|
|
return
|
|
if ord(ch) < 32 or ord(ch) >= 127:
|
|
raise QAPIParseError(
|
|
self, "funny character in string")
|
|
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.tok == '\n':
|
|
if self.cursor == len(self.src):
|
|
self.tok = None
|
|
return
|
|
self.info = self.info.next_line()
|
|
self.line_pos = self.cursor
|
|
elif not self.tok.isspace():
|
|
# Show up to next structural, whitespace or quote
|
|
# character
|
|
match = re.match('[^[\\]{}:,\\s\'"]+',
|
|
self.src[self.cursor-1:])
|
|
raise QAPIParseError(self, "stray '%s'" % match.group(0))
|
|
|
|
def get_members(self):
|
|
expr = OrderedDict()
|
|
if self.tok == '}':
|
|
self.accept()
|
|
return expr
|
|
if self.tok != "'":
|
|
raise QAPIParseError(self, "expected string or '}'")
|
|
while True:
|
|
key = self.val
|
|
self.accept()
|
|
if self.tok != ':':
|
|
raise QAPIParseError(self, "expected ':'")
|
|
self.accept()
|
|
if key in expr:
|
|
raise QAPIParseError(self, "duplicate key '%s'" % key)
|
|
expr[key] = self.get_expr(True)
|
|
if self.tok == '}':
|
|
self.accept()
|
|
return expr
|
|
if self.tok != ',':
|
|
raise QAPIParseError(self, "expected ',' or '}'")
|
|
self.accept()
|
|
if self.tok != "'":
|
|
raise QAPIParseError(self, "expected string")
|
|
|
|
def get_values(self):
|
|
expr = []
|
|
if self.tok == ']':
|
|
self.accept()
|
|
return expr
|
|
if self.tok not in "{['tfn":
|
|
raise QAPIParseError(
|
|
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 QAPIParseError(self, "expected ',' or ']'")
|
|
self.accept()
|
|
|
|
def get_expr(self, nested):
|
|
if self.tok != '{' and not nested:
|
|
raise QAPIParseError(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 QAPIParseError(
|
|
self, "expected '{', '[', string, boolean or 'null'")
|
|
return expr
|
|
|
|
def get_doc(self, info):
|
|
if self.val != '##':
|
|
raise QAPIParseError(
|
|
self, "junk after '##' at start of documentation comment")
|
|
|
|
doc = QAPIDoc(self, info)
|
|
self.accept(False)
|
|
while self.tok == '#':
|
|
if self.val.startswith('##'):
|
|
# End of doc comment
|
|
if self.val != '##':
|
|
raise QAPIParseError(
|
|
self,
|
|
"junk after '##' at end of documentation comment")
|
|
doc.end_comment()
|
|
self.accept()
|
|
return doc
|
|
else:
|
|
doc.append(self.val)
|
|
self.accept(False)
|
|
|
|
raise QAPIParseError(self, "documentation comment must end with '##'")
|
|
|
|
|
|
#
|
|
# Check (context-free) schema expression structure
|
|
#
|
|
|
|
# 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(r'^(__[a-zA-Z0-9.-]+_)?'
|
|
'[a-zA-Z][a-zA-Z0-9_-]*$')
|
|
|
|
|
|
def check_name(name, info, source,
|
|
allow_optional=False, enum_member=False, permit_upper=False):
|
|
check_name_is_str(name, info, source)
|
|
check_name_str(name, info, source,
|
|
allow_optional, enum_member, permit_upper)
|
|
|
|
|
|
def check_name_is_str(name, info, source):
|
|
if not isinstance(name, str):
|
|
raise QAPISemError(info, "%s requires a string name" % source)
|
|
|
|
|
|
def check_name_str(name, info, source,
|
|
allow_optional=False, enum_member=False,
|
|
permit_upper=False):
|
|
global valid_name
|
|
membername = name
|
|
|
|
if allow_optional and name.startswith('*'):
|
|
membername = name[1:]
|
|
# 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(), and for 'q_empty'
|
|
# and 'q_obj_*' implicit type names.
|
|
if not valid_name.match(membername) or \
|
|
c_name(membername, False).startswith('q_'):
|
|
raise QAPISemError(info, "%s uses invalid name '%s'" % (source, name))
|
|
if not permit_upper and name.lower() != name:
|
|
raise QAPISemError(
|
|
info, "%s uses uppercase in name '%s'" % (source, name))
|
|
assert not membername.startswith('*')
|
|
|
|
|
|
def check_defn_name_str(name, info, meta):
|
|
check_name_str(name, info, meta, permit_upper=True)
|
|
if name.endswith('Kind') or name.endswith('List'):
|
|
raise QAPISemError(
|
|
info, "%s '%s' should not end in '%s'" % (meta, name, name[-4:]))
|
|
|
|
|
|
def check_if(expr, info):
|
|
|
|
def check_if_str(ifcond, info):
|
|
if not isinstance(ifcond, str):
|
|
raise QAPISemError(
|
|
info, "'if' condition must be a string or a list of strings")
|
|
if ifcond.strip() == '':
|
|
raise QAPISemError(info, "'if' condition '%s' makes no sense"
|
|
% ifcond)
|
|
|
|
ifcond = expr.get('if')
|
|
if ifcond is None:
|
|
return
|
|
if isinstance(ifcond, list):
|
|
if ifcond == []:
|
|
raise QAPISemError(info, "'if' condition [] is useless")
|
|
for elt in ifcond:
|
|
check_if_str(elt, info)
|
|
else:
|
|
check_if_str(ifcond, info)
|
|
|
|
|
|
def check_type(value, info, source,
|
|
allow_array=False, allow_dict=False):
|
|
if value is None:
|
|
return
|
|
|
|
# Array type
|
|
if isinstance(value, list):
|
|
if not allow_array:
|
|
raise QAPISemError(info, "%s cannot be an array" % source)
|
|
if len(value) != 1 or not isinstance(value[0], str):
|
|
raise QAPISemError(info,
|
|
"%s: array type must contain single type name" %
|
|
source)
|
|
return
|
|
|
|
# Type name
|
|
if isinstance(value, str):
|
|
return
|
|
|
|
# Anonymous type
|
|
|
|
if not allow_dict:
|
|
raise QAPISemError(info, "%s should be a type name" % source)
|
|
|
|
if not isinstance(value, OrderedDict):
|
|
raise QAPISemError(info,
|
|
"%s should be an object or type name" % source)
|
|
|
|
permit_upper = allow_dict in name_case_whitelist
|
|
|
|
# value is a dictionary, check that each member is okay
|
|
for (key, arg) in value.items():
|
|
check_name_str(key, info, "member of %s" % source,
|
|
allow_optional=True, permit_upper=permit_upper)
|
|
if c_name(key, False) == 'u' or c_name(key, False).startswith('has_'):
|
|
raise QAPISemError(
|
|
info, "member of %s uses reserved name '%s'" % (source, key))
|
|
check_known_keys(arg, info, "member '%s' of %s" % (key, source),
|
|
['type'], ['if'])
|
|
check_if(arg, info)
|
|
normalize_if(arg)
|
|
check_type(arg['type'], info, "member '%s' of %s" % (key, source),
|
|
allow_array=True)
|
|
|
|
|
|
def check_command(expr, info):
|
|
name = expr['command']
|
|
boxed = expr.get('boxed', False)
|
|
|
|
check_type(expr.get('data'), info,
|
|
"'data' for command '%s'" % name,
|
|
allow_dict=not boxed)
|
|
check_type(expr.get('returns'), info,
|
|
"'returns' for command '%s'" % name,
|
|
allow_array=True)
|
|
|
|
|
|
def check_event(expr, info):
|
|
name = expr['event']
|
|
boxed = expr.get('boxed', False)
|
|
|
|
check_type(expr.get('data'), info,
|
|
"'data' for event '%s'" % name,
|
|
allow_dict=not boxed)
|
|
|
|
|
|
def check_union(expr, info):
|
|
name = expr['union']
|
|
base = expr.get('base')
|
|
discriminator = expr.get('discriminator')
|
|
members = expr['data']
|
|
|
|
if discriminator is None: # simple union
|
|
if base is not None:
|
|
raise QAPISemError(
|
|
info, "simple union '%s' must not have a base" % name)
|
|
else: # flat union
|
|
check_type(base, info, "'base' for union '%s'" % name,
|
|
allow_dict=name)
|
|
if not base:
|
|
raise QAPISemError(
|
|
info, "flat union '%s' must have a base" % name)
|
|
check_name_is_str(discriminator, info,
|
|
"discriminator of flat union '%s'" % name)
|
|
|
|
for (key, value) in members.items():
|
|
check_name_str(key, info, "member of union '%s'" % name)
|
|
check_known_keys(value, info,
|
|
"member '%s' of union '%s'" % (key, name),
|
|
['type'], ['if'])
|
|
check_if(value, info)
|
|
normalize_if(value)
|
|
check_type(value['type'], info,
|
|
"member '%s' of union '%s'" % (key, name),
|
|
allow_array=not base)
|
|
|
|
|
|
def check_alternate(expr, info):
|
|
name = expr['alternate']
|
|
members = expr['data']
|
|
|
|
if len(members) == 0:
|
|
raise QAPISemError(info,
|
|
"alternate '%s' cannot have empty 'data'" % name)
|
|
for (key, value) in members.items():
|
|
check_name_str(key, info, "member of alternate '%s'" % name)
|
|
check_known_keys(value, info,
|
|
"member '%s' of alternate '%s'" % (key, name),
|
|
['type'], ['if'])
|
|
check_if(value, info)
|
|
normalize_if(value)
|
|
check_type(value['type'], info,
|
|
"member '%s' of alternate '%s'" % (key, name))
|
|
|
|
|
|
def check_enum(expr, info):
|
|
name = expr['enum']
|
|
members = expr['data']
|
|
prefix = expr.get('prefix')
|
|
|
|
if not isinstance(members, list):
|
|
raise QAPISemError(info,
|
|
"enum '%s' requires an array for 'data'" % name)
|
|
if prefix is not None and not isinstance(prefix, str):
|
|
raise QAPISemError(info,
|
|
"enum '%s' requires a string for 'prefix'" % name)
|
|
|
|
permit_upper = name in name_case_whitelist
|
|
|
|
for member in members:
|
|
check_known_keys(member, info, "member of enum '%s'" % name,
|
|
['name'], ['if'])
|
|
check_if(member, info)
|
|
normalize_if(member)
|
|
check_name(member['name'], info, "member of enum '%s'" % name,
|
|
enum_member=True, permit_upper=permit_upper)
|
|
|
|
|
|
def check_struct(expr, info):
|
|
name = expr['struct']
|
|
members = expr['data']
|
|
features = expr.get('features')
|
|
|
|
check_type(members, info, "'data' for struct '%s'" % name,
|
|
allow_dict=name)
|
|
check_type(expr.get('base'), info, "'base' for struct '%s'" % name)
|
|
|
|
if features:
|
|
if not isinstance(features, list):
|
|
raise QAPISemError(
|
|
info, "struct '%s' requires an array for 'features'" % name)
|
|
for f in features:
|
|
assert isinstance(f, dict)
|
|
check_known_keys(f, info, "feature of struct %s" % name,
|
|
['name'], ['if'])
|
|
|
|
check_if(f, info)
|
|
normalize_if(f)
|
|
check_name(f['name'], info, "feature of struct %s" % name)
|
|
|
|
|
|
def check_known_keys(value, info, source, required, optional):
|
|
|
|
def pprint(elems):
|
|
return ', '.join("'" + e + "'" for e in sorted(elems))
|
|
|
|
missing = set(required) - set(value)
|
|
if missing:
|
|
raise QAPISemError(
|
|
info,
|
|
"key%s %s %s missing from %s"
|
|
% ('s' if len(missing) > 1 else '', pprint(missing),
|
|
'are' if len(missing) > 1 else 'is', source))
|
|
allowed = set(required + optional)
|
|
unknown = set(value) - allowed
|
|
if unknown:
|
|
raise QAPISemError(
|
|
info,
|
|
"unknown key%s %s in %s\nValid keys are %s."
|
|
% ('s' if len(unknown) > 1 else '', pprint(unknown),
|
|
source, pprint(allowed)))
|
|
|
|
|
|
def check_keys(expr, info, meta, required, optional=[]):
|
|
name = expr[meta]
|
|
if not isinstance(name, str):
|
|
raise QAPISemError(info, "'%s' key must have a string value" % meta)
|
|
required = required + [meta]
|
|
source = "%s '%s'" % (meta, name)
|
|
check_known_keys(expr, info, source, required, optional)
|
|
for (key, value) in expr.items():
|
|
if key in ['gen', 'success-response'] and value is not False:
|
|
raise QAPISemError(info,
|
|
"'%s' of %s '%s' should only use false value"
|
|
% (key, meta, name))
|
|
if (key in ['boxed', 'allow-oob', 'allow-preconfig']
|
|
and value is not True):
|
|
raise QAPISemError(info,
|
|
"'%s' of %s '%s' should only use true value"
|
|
% (key, meta, name))
|
|
if key == 'if':
|
|
check_if(expr, info)
|
|
|
|
|
|
def normalize_enum(expr):
|
|
if isinstance(expr['data'], list):
|
|
expr['data'] = [m if isinstance(m, dict) else {'name': m}
|
|
for m in expr['data']]
|
|
|
|
|
|
def normalize_members(members):
|
|
if isinstance(members, OrderedDict):
|
|
for key, arg in members.items():
|
|
if isinstance(arg, dict):
|
|
continue
|
|
members[key] = {'type': arg}
|
|
|
|
|
|
def normalize_features(features):
|
|
if isinstance(features, list):
|
|
features[:] = [f if isinstance(f, dict) else {'name': f}
|
|
for f in features]
|
|
|
|
|
|
def normalize_if(expr):
|
|
ifcond = expr.get('if')
|
|
if isinstance(ifcond, str):
|
|
expr['if'] = [ifcond]
|
|
|
|
|
|
def check_exprs(exprs):
|
|
for expr_elem in exprs:
|
|
expr = expr_elem['expr']
|
|
info = expr_elem['info']
|
|
doc = expr_elem.get('doc')
|
|
|
|
if 'include' in expr:
|
|
continue
|
|
|
|
if not doc and doc_required:
|
|
raise QAPISemError(info,
|
|
"definition missing documentation comment")
|
|
|
|
if 'enum' in expr:
|
|
meta = 'enum'
|
|
check_keys(expr, info, 'enum', ['data'], ['if', 'prefix'])
|
|
normalize_enum(expr)
|
|
elif 'union' in expr:
|
|
meta = 'union'
|
|
check_keys(expr, info, 'union', ['data'],
|
|
['base', 'discriminator', 'if'])
|
|
normalize_members(expr.get('base'))
|
|
normalize_members(expr['data'])
|
|
elif 'alternate' in expr:
|
|
meta = 'alternate'
|
|
check_keys(expr, info, 'alternate', ['data'], ['if'])
|
|
normalize_members(expr['data'])
|
|
elif 'struct' in expr:
|
|
meta = 'struct'
|
|
check_keys(expr, info, 'struct', ['data'],
|
|
['base', 'if', 'features'])
|
|
normalize_members(expr['data'])
|
|
normalize_features(expr.get('features'))
|
|
elif 'command' in expr:
|
|
meta = 'command'
|
|
check_keys(expr, info, 'command', [],
|
|
['data', 'returns', 'gen', 'success-response',
|
|
'boxed', 'allow-oob', 'allow-preconfig', 'if'])
|
|
normalize_members(expr.get('data'))
|
|
elif 'event' in expr:
|
|
meta = 'event'
|
|
check_keys(expr, info, 'event', [], ['data', 'boxed', 'if'])
|
|
normalize_members(expr.get('data'))
|
|
else:
|
|
raise QAPISemError(info, "expression is missing metatype")
|
|
normalize_if(expr)
|
|
|
|
name = expr[meta]
|
|
check_name_is_str(name, info, "'%s'" % meta)
|
|
info.set_defn(meta, name)
|
|
check_defn_name_str(name, info, meta)
|
|
|
|
if doc and doc.symbol != name:
|
|
raise QAPISemError(
|
|
info,
|
|
"definition of '%s' follows documentation for '%s'"
|
|
% (name, doc.symbol))
|
|
|
|
if meta == 'enum':
|
|
check_enum(expr, info)
|
|
elif meta == 'union':
|
|
check_union(expr, info)
|
|
elif meta == 'alternate':
|
|
check_alternate(expr, info)
|
|
elif meta == 'struct':
|
|
check_struct(expr, info)
|
|
elif meta == 'command':
|
|
check_command(expr, info)
|
|
elif meta == 'event':
|
|
check_event(expr, info)
|
|
else:
|
|
assert False, 'unexpected meta type'
|
|
|
|
if doc:
|
|
doc.check_expr(expr)
|
|
|
|
return exprs
|
|
|
|
|
|
#
|
|
# Schema compiler frontend
|
|
# TODO catching name collisions in generated code would be nice
|
|
#
|
|
|
|
class QAPISchemaEntity(object):
|
|
meta = None
|
|
|
|
def __init__(self, name, info, doc, ifcond=None):
|
|
assert name is None or isinstance(name, str)
|
|
self.name = name
|
|
self._module = None
|
|
# 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
|
|
self.doc = doc
|
|
self._ifcond = ifcond or []
|
|
self._checked = False
|
|
|
|
def c_name(self):
|
|
return c_name(self.name)
|
|
|
|
def check(self, schema):
|
|
assert not self._checked
|
|
if self.info:
|
|
self._module = os.path.relpath(self.info.fname,
|
|
os.path.dirname(schema.fname))
|
|
self._checked = True
|
|
|
|
@property
|
|
def ifcond(self):
|
|
assert self._checked
|
|
return self._ifcond
|
|
|
|
@property
|
|
def module(self):
|
|
assert self._checked
|
|
return self._module
|
|
|
|
def is_implicit(self):
|
|
return not self.info
|
|
|
|
def visit(self, visitor):
|
|
assert self._checked
|
|
|
|
def describe(self):
|
|
assert self.meta
|
|
return "%s '%s'" % (self.meta, self.name)
|
|
|
|
|
|
class QAPISchemaVisitor(object):
|
|
def visit_begin(self, schema):
|
|
pass
|
|
|
|
def visit_end(self):
|
|
pass
|
|
|
|
def visit_module(self, fname):
|
|
pass
|
|
|
|
def visit_needed(self, entity):
|
|
# Default to visiting everything
|
|
return True
|
|
|
|
def visit_include(self, fname, info):
|
|
pass
|
|
|
|
def visit_builtin_type(self, name, info, json_type):
|
|
pass
|
|
|
|
def visit_enum_type(self, name, info, ifcond, members, prefix):
|
|
pass
|
|
|
|
def visit_array_type(self, name, info, ifcond, element_type):
|
|
pass
|
|
|
|
def visit_object_type(self, name, info, ifcond, base, members, variants,
|
|
features):
|
|
pass
|
|
|
|
def visit_object_type_flat(self, name, info, ifcond, members, variants,
|
|
features):
|
|
pass
|
|
|
|
def visit_alternate_type(self, name, info, ifcond, variants):
|
|
pass
|
|
|
|
def visit_command(self, name, info, ifcond, arg_type, ret_type, gen,
|
|
success_response, boxed, allow_oob, allow_preconfig):
|
|
pass
|
|
|
|
def visit_event(self, name, info, ifcond, arg_type, boxed):
|
|
pass
|
|
|
|
|
|
class QAPISchemaInclude(QAPISchemaEntity):
|
|
|
|
def __init__(self, fname, info):
|
|
QAPISchemaEntity.__init__(self, None, info, None)
|
|
self.fname = fname
|
|
|
|
def visit(self, visitor):
|
|
QAPISchemaEntity.visit(self, visitor)
|
|
visitor.visit_include(self.fname, self.info)
|
|
|
|
|
|
class QAPISchemaType(QAPISchemaEntity):
|
|
# Return the C type for common use.
|
|
# For the types we commonly box, this is a pointer type.
|
|
def c_type(self):
|
|
pass
|
|
|
|
# Return the C type to be used in a parameter list.
|
|
def c_param_type(self):
|
|
return self.c_type()
|
|
|
|
# Return the C type to be used where we suppress boxing.
|
|
def c_unboxed_type(self):
|
|
return self.c_type()
|
|
|
|
def json_type(self):
|
|
pass
|
|
|
|
def alternate_qtype(self):
|
|
json2qtype = {
|
|
'null': 'QTYPE_QNULL',
|
|
'string': 'QTYPE_QSTRING',
|
|
'number': 'QTYPE_QNUM',
|
|
'int': 'QTYPE_QNUM',
|
|
'boolean': 'QTYPE_QBOOL',
|
|
'object': 'QTYPE_QDICT'
|
|
}
|
|
return json2qtype.get(self.json_type())
|
|
|
|
def doc_type(self):
|
|
if self.is_implicit():
|
|
return None
|
|
return self.name
|
|
|
|
def describe(self):
|
|
assert self.meta
|
|
return "%s type '%s'" % (self.meta, self.name)
|
|
|
|
|
|
class QAPISchemaBuiltinType(QAPISchemaType):
|
|
meta = 'built-in'
|
|
|
|
def __init__(self, name, json_type, c_type):
|
|
QAPISchemaType.__init__(self, name, None, 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
|
|
|
|
def c_name(self):
|
|
return self.name
|
|
|
|
def c_type(self):
|
|
return self._c_type_name
|
|
|
|
def c_param_type(self):
|
|
if self.name == 'str':
|
|
return 'const ' + self._c_type_name
|
|
return self._c_type_name
|
|
|
|
def json_type(self):
|
|
return self._json_type_name
|
|
|
|
def doc_type(self):
|
|
return self.json_type()
|
|
|
|
def visit(self, visitor):
|
|
QAPISchemaType.visit(self, visitor)
|
|
visitor.visit_builtin_type(self.name, self.info, self.json_type())
|
|
|
|
|
|
class QAPISchemaEnumType(QAPISchemaType):
|
|
meta = 'enum'
|
|
|
|
def __init__(self, name, info, doc, ifcond, members, prefix):
|
|
QAPISchemaType.__init__(self, name, info, doc, ifcond)
|
|
for m in members:
|
|
assert isinstance(m, QAPISchemaEnumMember)
|
|
m.set_defined_in(name)
|
|
assert prefix is None or isinstance(prefix, str)
|
|
self.members = members
|
|
self.prefix = prefix
|
|
|
|
def check(self, schema):
|
|
QAPISchemaType.check(self, schema)
|
|
seen = {}
|
|
for m in self.members:
|
|
m.check_clash(self.info, seen)
|
|
if self.doc:
|
|
self.doc.connect_member(m)
|
|
|
|
def is_implicit(self):
|
|
# See QAPISchema._make_implicit_enum_type() and ._def_predefineds()
|
|
return self.name.endswith('Kind') or self.name == 'QType'
|
|
|
|
def c_type(self):
|
|
return c_name(self.name)
|
|
|
|
def member_names(self):
|
|
return [m.name for m in self.members]
|
|
|
|
def json_type(self):
|
|
return 'string'
|
|
|
|
def visit(self, visitor):
|
|
QAPISchemaType.visit(self, visitor)
|
|
visitor.visit_enum_type(self.name, self.info, self.ifcond,
|
|
self.members, self.prefix)
|
|
|
|
|
|
class QAPISchemaArrayType(QAPISchemaType):
|
|
meta = 'array'
|
|
|
|
def __init__(self, name, info, element_type):
|
|
QAPISchemaType.__init__(self, name, info, None, None)
|
|
assert isinstance(element_type, str)
|
|
self._element_type_name = element_type
|
|
self.element_type = None
|
|
|
|
def check(self, schema):
|
|
QAPISchemaType.check(self, schema)
|
|
self.element_type = schema.resolve_type(
|
|
self._element_type_name, self.info,
|
|
self.info and self.info.defn_meta)
|
|
assert not isinstance(self.element_type, QAPISchemaArrayType)
|
|
|
|
@property
|
|
def ifcond(self):
|
|
assert self._checked
|
|
return self.element_type.ifcond
|
|
|
|
@property
|
|
def module(self):
|
|
assert self._checked
|
|
return self.element_type.module
|
|
|
|
def is_implicit(self):
|
|
return True
|
|
|
|
def c_type(self):
|
|
return c_name(self.name) + pointer_suffix
|
|
|
|
def json_type(self):
|
|
return 'array'
|
|
|
|
def doc_type(self):
|
|
elt_doc_type = self.element_type.doc_type()
|
|
if not elt_doc_type:
|
|
return None
|
|
return 'array of ' + elt_doc_type
|
|
|
|
def visit(self, visitor):
|
|
QAPISchemaType.visit(self, visitor)
|
|
visitor.visit_array_type(self.name, self.info, self.ifcond,
|
|
self.element_type)
|
|
|
|
def describe(self):
|
|
assert self.meta
|
|
return "%s type ['%s']" % (self.meta, self._element_type_name)
|
|
|
|
|
|
class QAPISchemaObjectType(QAPISchemaType):
|
|
def __init__(self, name, info, doc, ifcond,
|
|
base, local_members, variants, features):
|
|
# 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, doc, ifcond)
|
|
self.meta = 'union' if variants else 'struct'
|
|
assert base is None or isinstance(base, str)
|
|
for m in local_members:
|
|
assert isinstance(m, QAPISchemaObjectTypeMember)
|
|
m.set_defined_in(name)
|
|
if variants is not None:
|
|
assert isinstance(variants, QAPISchemaObjectTypeVariants)
|
|
variants.set_defined_in(name)
|
|
for f in features:
|
|
assert isinstance(f, QAPISchemaFeature)
|
|
f.set_defined_in(name)
|
|
self._base_name = base
|
|
self.base = None
|
|
self.local_members = local_members
|
|
self.variants = variants
|
|
self.members = None
|
|
self.features = features
|
|
|
|
def check(self, schema):
|
|
# This calls another type T's .check() exactly when the C
|
|
# struct emitted by gen_object() contains that T's C struct
|
|
# (pointers don't count).
|
|
if self.members is not None:
|
|
# A previous .check() completed: nothing to do
|
|
return
|
|
if self._checked:
|
|
# Recursed: C struct contains itself
|
|
raise QAPISemError(self.info,
|
|
"object %s contains itself" % self.name)
|
|
|
|
QAPISchemaType.check(self, schema)
|
|
assert self._checked and self.members is None
|
|
|
|
seen = OrderedDict()
|
|
if self._base_name:
|
|
self.base = schema.resolve_type(self._base_name, self.info,
|
|
"'base'")
|
|
if (not isinstance(self.base, QAPISchemaObjectType)
|
|
or self.base.variants):
|
|
raise QAPISemError(
|
|
self.info,
|
|
"'base' requires a struct type, %s isn't"
|
|
% self.base.describe())
|
|
self.base.check(schema)
|
|
self.base.check_clash(self.info, seen)
|
|
for m in self.local_members:
|
|
m.check(schema)
|
|
m.check_clash(self.info, seen)
|
|
if self.doc:
|
|
self.doc.connect_member(m)
|
|
members = seen.values()
|
|
|
|
if self.variants:
|
|
self.variants.check(schema, seen)
|
|
self.variants.check_clash(self.info, seen)
|
|
|
|
# Features are in a name space separate from members
|
|
seen = {}
|
|
for f in self.features:
|
|
f.check_clash(self.info, seen)
|
|
|
|
if self.doc:
|
|
self.doc.check()
|
|
|
|
self.members = members # mark completed
|
|
|
|
# Check that the members of this type do not cause duplicate JSON members,
|
|
# 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, info, seen):
|
|
assert self._checked
|
|
assert not self.variants # not implemented
|
|
for m in self.members:
|
|
m.check_clash(info, seen)
|
|
|
|
@property
|
|
def ifcond(self):
|
|
assert self._checked
|
|
if isinstance(self._ifcond, QAPISchemaType):
|
|
# Simple union wrapper type inherits from wrapped type;
|
|
# see _make_implicit_object_type()
|
|
return self._ifcond.ifcond
|
|
return self._ifcond
|
|
|
|
def is_implicit(self):
|
|
# See QAPISchema._make_implicit_object_type(), as well as
|
|
# _def_predefineds()
|
|
return self.name.startswith('q_')
|
|
|
|
def is_empty(self):
|
|
assert self.members is not None
|
|
return not self.members and not self.variants
|
|
|
|
def c_name(self):
|
|
assert self.name != 'q_empty'
|
|
return QAPISchemaType.c_name(self)
|
|
|
|
def c_type(self):
|
|
assert not self.is_implicit()
|
|
return c_name(self.name) + pointer_suffix
|
|
|
|
def c_unboxed_type(self):
|
|
return c_name(self.name)
|
|
|
|
def json_type(self):
|
|
return 'object'
|
|
|
|
def visit(self, visitor):
|
|
QAPISchemaType.visit(self, visitor)
|
|
visitor.visit_object_type(self.name, self.info, self.ifcond,
|
|
self.base, self.local_members, self.variants,
|
|
self.features)
|
|
visitor.visit_object_type_flat(self.name, self.info, self.ifcond,
|
|
self.members, self.variants,
|
|
self.features)
|
|
|
|
|
|
class QAPISchemaMember(object):
|
|
""" Represents object members, enum members and features """
|
|
role = 'member'
|
|
|
|
def __init__(self, name, info, ifcond=None):
|
|
assert isinstance(name, str)
|
|
self.name = name
|
|
self.info = info
|
|
self.ifcond = ifcond or []
|
|
self.defined_in = None
|
|
|
|
def set_defined_in(self, name):
|
|
assert not self.defined_in
|
|
self.defined_in = name
|
|
|
|
def check_clash(self, info, seen):
|
|
cname = c_name(self.name)
|
|
if cname in seen:
|
|
raise QAPISemError(
|
|
info,
|
|
"%s collides with %s"
|
|
% (self.describe(info), seen[cname].describe(info)))
|
|
seen[cname] = self
|
|
|
|
def describe(self, info):
|
|
role = self.role
|
|
defined_in = self.defined_in
|
|
assert defined_in
|
|
|
|
if defined_in.startswith('q_obj_'):
|
|
# See QAPISchema._make_implicit_object_type() - reverse the
|
|
# mapping there to create a nice human-readable description
|
|
defined_in = defined_in[6:]
|
|
if defined_in.endswith('-arg'):
|
|
# Implicit type created for a command's dict 'data'
|
|
assert role == 'member'
|
|
role = 'parameter'
|
|
elif defined_in.endswith('-base'):
|
|
# Implicit type created for a flat union's dict 'base'
|
|
role = 'base ' + role
|
|
else:
|
|
# Implicit type created for a simple union's branch
|
|
assert defined_in.endswith('-wrapper')
|
|
# Unreachable and not implemented
|
|
assert False
|
|
elif defined_in.endswith('Kind'):
|
|
# See QAPISchema._make_implicit_enum_type()
|
|
# Implicit enum created for simple union's branches
|
|
assert role == 'value'
|
|
role = 'branch'
|
|
elif defined_in != info.defn_name:
|
|
return "%s '%s' of type '%s'" % (role, self.name, defined_in)
|
|
return "%s '%s'" % (role, self.name)
|
|
|
|
|
|
class QAPISchemaEnumMember(QAPISchemaMember):
|
|
role = 'value'
|
|
|
|
|
|
class QAPISchemaFeature(QAPISchemaMember):
|
|
role = 'feature'
|
|
|
|
|
|
class QAPISchemaObjectTypeMember(QAPISchemaMember):
|
|
def __init__(self, name, info, typ, optional, ifcond=None):
|
|
QAPISchemaMember.__init__(self, name, info, ifcond)
|
|
assert isinstance(typ, str)
|
|
assert isinstance(optional, bool)
|
|
self._type_name = typ
|
|
self.type = None
|
|
self.optional = optional
|
|
|
|
def check(self, schema):
|
|
assert self.defined_in
|
|
self.type = schema.resolve_type(self._type_name, self.info,
|
|
self.describe)
|
|
|
|
|
|
class QAPISchemaObjectTypeVariants(object):
|
|
def __init__(self, tag_name, info, 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.info = info
|
|
self.tag_member = tag_member
|
|
self.variants = variants
|
|
|
|
def set_defined_in(self, name):
|
|
for v in self.variants:
|
|
v.set_defined_in(name)
|
|
|
|
def check(self, schema, seen):
|
|
if not self.tag_member: # flat union
|
|
self.tag_member = seen.get(c_name(self._tag_name))
|
|
base = "'base'"
|
|
# Pointing to the base type when not implicit would be
|
|
# nice, but we don't know it here
|
|
if not self.tag_member or self._tag_name != self.tag_member.name:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"discriminator '%s' is not a member of %s"
|
|
% (self._tag_name, base))
|
|
# Here we do:
|
|
base_type = schema.lookup_type(self.tag_member.defined_in)
|
|
assert base_type
|
|
if not base_type.is_implicit():
|
|
base = "base type '%s'" % self.tag_member.defined_in
|
|
if not isinstance(self.tag_member.type, QAPISchemaEnumType):
|
|
raise QAPISemError(
|
|
self.info,
|
|
"discriminator member '%s' of %s must be of enum type"
|
|
% (self._tag_name, base))
|
|
if self.tag_member.optional:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"discriminator member '%s' of %s must not be optional"
|
|
% (self._tag_name, base))
|
|
if self.tag_member.ifcond:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"discriminator member '%s' of %s must not be conditional"
|
|
% (self._tag_name, base))
|
|
else: # simple union
|
|
assert isinstance(self.tag_member.type, QAPISchemaEnumType)
|
|
assert not self.tag_member.optional
|
|
assert self.tag_member.ifcond == []
|
|
if self._tag_name: # flat union
|
|
# branches that are not explicitly covered get an empty type
|
|
cases = set([v.name for v in self.variants])
|
|
for m in self.tag_member.type.members:
|
|
if m.name not in cases:
|
|
v = QAPISchemaObjectTypeVariant(m.name, self.info,
|
|
'q_empty', m.ifcond)
|
|
v.set_defined_in(self.tag_member.defined_in)
|
|
self.variants.append(v)
|
|
if not self.variants:
|
|
raise QAPISemError(self.info, "union has no branches")
|
|
for v in self.variants:
|
|
v.check(schema)
|
|
# Union names must match enum values; alternate names are
|
|
# checked separately. Use 'seen' to tell the two apart.
|
|
if seen:
|
|
if v.name not in self.tag_member.type.member_names():
|
|
raise QAPISemError(
|
|
self.info,
|
|
"branch '%s' is not a value of %s"
|
|
% (v.name, self.tag_member.type.describe()))
|
|
if (not isinstance(v.type, QAPISchemaObjectType)
|
|
or v.type.variants):
|
|
raise QAPISemError(
|
|
self.info,
|
|
"%s cannot use %s"
|
|
% (v.describe(self.info), v.type.describe()))
|
|
v.type.check(schema)
|
|
|
|
def check_clash(self, info, seen):
|
|
for v in self.variants:
|
|
# Reset seen map for each variant, since qapi names from one
|
|
# branch do not affect another branch
|
|
v.type.check_clash(info, dict(seen))
|
|
|
|
|
|
class QAPISchemaObjectTypeVariant(QAPISchemaObjectTypeMember):
|
|
role = 'branch'
|
|
|
|
def __init__(self, name, info, typ, ifcond=None):
|
|
QAPISchemaObjectTypeMember.__init__(self, name, info, typ,
|
|
False, ifcond)
|
|
|
|
|
|
class QAPISchemaAlternateType(QAPISchemaType):
|
|
meta = 'alternate'
|
|
|
|
def __init__(self, name, info, doc, ifcond, variants):
|
|
QAPISchemaType.__init__(self, name, info, doc, ifcond)
|
|
assert isinstance(variants, QAPISchemaObjectTypeVariants)
|
|
assert variants.tag_member
|
|
variants.set_defined_in(name)
|
|
variants.tag_member.set_defined_in(self.name)
|
|
self.variants = variants
|
|
|
|
def check(self, schema):
|
|
QAPISchemaType.check(self, schema)
|
|
self.variants.tag_member.check(schema)
|
|
# Not calling self.variants.check_clash(), because there's nothing
|
|
# to clash with
|
|
self.variants.check(schema, {})
|
|
# Alternate branch names have no relation to the tag enum values;
|
|
# so we have to check for potential name collisions ourselves.
|
|
seen = {}
|
|
types_seen = {}
|
|
for v in self.variants.variants:
|
|
v.check_clash(self.info, seen)
|
|
qtype = v.type.alternate_qtype()
|
|
if not qtype:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"%s cannot use %s"
|
|
% (v.describe(self.info), v.type.describe()))
|
|
conflicting = set([qtype])
|
|
if qtype == 'QTYPE_QSTRING':
|
|
if isinstance(v.type, QAPISchemaEnumType):
|
|
for m in v.type.members:
|
|
if m.name in ['on', 'off']:
|
|
conflicting.add('QTYPE_QBOOL')
|
|
if re.match(r'[-+0-9.]', m.name):
|
|
# lazy, could be tightened
|
|
conflicting.add('QTYPE_QNUM')
|
|
else:
|
|
conflicting.add('QTYPE_QNUM')
|
|
conflicting.add('QTYPE_QBOOL')
|
|
for qt in conflicting:
|
|
if qt in types_seen:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"%s can't be distinguished from '%s'"
|
|
% (v.describe(self.info), types_seen[qt]))
|
|
types_seen[qt] = v.name
|
|
if self.doc:
|
|
self.doc.connect_member(v)
|
|
if self.doc:
|
|
self.doc.check()
|
|
|
|
def c_type(self):
|
|
return c_name(self.name) + pointer_suffix
|
|
|
|
def json_type(self):
|
|
return 'value'
|
|
|
|
def visit(self, visitor):
|
|
QAPISchemaType.visit(self, visitor)
|
|
visitor.visit_alternate_type(self.name, self.info, self.ifcond,
|
|
self.variants)
|
|
|
|
|
|
class QAPISchemaCommand(QAPISchemaEntity):
|
|
meta = 'command'
|
|
|
|
def __init__(self, name, info, doc, ifcond, arg_type, ret_type,
|
|
gen, success_response, boxed, allow_oob, allow_preconfig):
|
|
QAPISchemaEntity.__init__(self, name, info, doc, ifcond)
|
|
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
|
|
self.boxed = boxed
|
|
self.allow_oob = allow_oob
|
|
self.allow_preconfig = allow_preconfig
|
|
|
|
def check(self, schema):
|
|
QAPISchemaEntity.check(self, schema)
|
|
if self._arg_type_name:
|
|
self.arg_type = schema.resolve_type(
|
|
self._arg_type_name, self.info, "command's 'data'")
|
|
if not isinstance(self.arg_type, QAPISchemaObjectType):
|
|
raise QAPISemError(
|
|
self.info,
|
|
"command's 'data' cannot take %s"
|
|
% self.arg_type.describe())
|
|
if self.arg_type.variants and not self.boxed:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"command's 'data' can take %s only with 'boxed': true"
|
|
% self.arg_type.describe())
|
|
elif self.boxed:
|
|
raise QAPISemError(self.info, "use of 'boxed' requires 'data'")
|
|
if self._ret_type_name:
|
|
self.ret_type = schema.resolve_type(
|
|
self._ret_type_name, self.info, "command's 'returns'")
|
|
if self.name not in returns_whitelist:
|
|
if not (isinstance(self.ret_type, QAPISchemaObjectType)
|
|
or (isinstance(self.ret_type, QAPISchemaArrayType)
|
|
and isinstance(self.ret_type.element_type,
|
|
QAPISchemaObjectType))):
|
|
raise QAPISemError(
|
|
self.info,
|
|
"command's 'returns' cannot take %s"
|
|
% self.ret_type.describe())
|
|
|
|
def visit(self, visitor):
|
|
QAPISchemaEntity.visit(self, visitor)
|
|
visitor.visit_command(self.name, self.info, self.ifcond,
|
|
self.arg_type, self.ret_type,
|
|
self.gen, self.success_response,
|
|
self.boxed, self.allow_oob,
|
|
self.allow_preconfig)
|
|
|
|
|
|
class QAPISchemaEvent(QAPISchemaEntity):
|
|
meta = 'event'
|
|
|
|
def __init__(self, name, info, doc, ifcond, arg_type, boxed):
|
|
QAPISchemaEntity.__init__(self, name, info, doc, ifcond)
|
|
assert not arg_type or isinstance(arg_type, str)
|
|
self._arg_type_name = arg_type
|
|
self.arg_type = None
|
|
self.boxed = boxed
|
|
|
|
def check(self, schema):
|
|
QAPISchemaEntity.check(self, schema)
|
|
if self._arg_type_name:
|
|
self.arg_type = schema.resolve_type(
|
|
self._arg_type_name, self.info, "event's 'data'")
|
|
if not isinstance(self.arg_type, QAPISchemaObjectType):
|
|
raise QAPISemError(
|
|
self.info,
|
|
"event's 'data' cannot take %s"
|
|
% self.arg_type.describe())
|
|
if self.arg_type.variants and not self.boxed:
|
|
raise QAPISemError(
|
|
self.info,
|
|
"event's 'data' can take %s only with 'boxed': true"
|
|
% self.arg_type.describe())
|
|
elif self.boxed:
|
|
raise QAPISemError(self.info, "use of 'boxed' requires 'data'")
|
|
|
|
def visit(self, visitor):
|
|
QAPISchemaEntity.visit(self, visitor)
|
|
visitor.visit_event(self.name, self.info, self.ifcond,
|
|
self.arg_type, self.boxed)
|
|
|
|
|
|
class QAPISchema(object):
|
|
def __init__(self, fname):
|
|
self.fname = fname
|
|
if sys.version_info[0] >= 3:
|
|
f = open(fname, 'r', encoding='utf-8')
|
|
else:
|
|
f = open(fname, 'r')
|
|
parser = QAPISchemaParser(f)
|
|
exprs = check_exprs(parser.exprs)
|
|
self.docs = parser.docs
|
|
self._entity_list = []
|
|
self._entity_dict = {}
|
|
self._predefining = True
|
|
self._def_predefineds()
|
|
self._predefining = False
|
|
self._def_exprs(exprs)
|
|
self.check()
|
|
|
|
def _def_entity(self, ent):
|
|
# Only the predefined types are allowed to not have info
|
|
assert ent.info or self._predefining
|
|
self._entity_list.append(ent)
|
|
if ent.name is None:
|
|
return
|
|
# TODO reject names that differ only in '_' vs. '.' vs. '-',
|
|
# because they're liable to clash in generated C.
|
|
other_ent = self._entity_dict.get(ent.name)
|
|
if other_ent:
|
|
raise QAPISemError(
|
|
ent.info, "%s is already defined" % other_ent.describe())
|
|
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 resolve_type(self, name, info, what):
|
|
typ = self.lookup_type(name)
|
|
if not typ:
|
|
if callable(what):
|
|
what = what(info)
|
|
raise QAPISemError(
|
|
info, "%s uses unknown type '%s'" % (what, name))
|
|
return typ
|
|
|
|
def _def_include(self, expr, info, doc):
|
|
include = expr['include']
|
|
assert doc is None
|
|
main_info = info
|
|
while main_info.parent:
|
|
main_info = main_info.parent
|
|
fname = os.path.relpath(include, os.path.dirname(main_info.fname))
|
|
self._def_entity(QAPISchemaInclude(fname, info))
|
|
|
|
def _def_builtin_type(self, name, json_type, c_type):
|
|
self._def_entity(QAPISchemaBuiltinType(name, json_type, c_type))
|
|
# Instantiating only the arrays that are actually used would
|
|
# be nice, but we can't as long as their generated code
|
|
# (qapi-builtin-types.[ch]) may be shared by some other
|
|
# schema.
|
|
self._make_array_type(name, None)
|
|
|
|
def _def_predefineds(self):
|
|
for t in [('str', 'string', 'char' + pointer_suffix),
|
|
('number', 'number', 'double'),
|
|
('int', 'int', 'int64_t'),
|
|
('int8', 'int', 'int8_t'),
|
|
('int16', 'int', 'int16_t'),
|
|
('int32', 'int', 'int32_t'),
|
|
('int64', 'int', 'int64_t'),
|
|
('uint8', 'int', 'uint8_t'),
|
|
('uint16', 'int', 'uint16_t'),
|
|
('uint32', 'int', 'uint32_t'),
|
|
('uint64', 'int', 'uint64_t'),
|
|
('size', 'int', 'uint64_t'),
|
|
('bool', 'boolean', 'bool'),
|
|
('any', 'value', 'QObject' + pointer_suffix),
|
|
('null', 'null', 'QNull' + pointer_suffix)]:
|
|
self._def_builtin_type(*t)
|
|
self.the_empty_object_type = QAPISchemaObjectType(
|
|
'q_empty', None, None, None, None, [], None, [])
|
|
self._def_entity(self.the_empty_object_type)
|
|
|
|
qtypes = ['none', 'qnull', 'qnum', 'qstring', 'qdict', 'qlist',
|
|
'qbool']
|
|
qtype_values = self._make_enum_members(
|
|
[{'name': n} for n in qtypes], None)
|
|
|
|
self._def_entity(QAPISchemaEnumType('QType', None, None, None,
|
|
qtype_values, 'QTYPE'))
|
|
|
|
def _make_features(self, features, info):
|
|
return [QAPISchemaFeature(f['name'], info, f.get('if'))
|
|
for f in features]
|
|
|
|
def _make_enum_members(self, values, info):
|
|
return [QAPISchemaEnumMember(v['name'], info, v.get('if'))
|
|
for v in values]
|
|
|
|
def _make_implicit_enum_type(self, name, info, ifcond, values):
|
|
# See also QAPISchemaObjectTypeMember.describe()
|
|
name = name + 'Kind' # reserved by check_defn_name_str()
|
|
self._def_entity(QAPISchemaEnumType(
|
|
name, info, None, ifcond, self._make_enum_members(values, info),
|
|
None))
|
|
return name
|
|
|
|
def _make_array_type(self, element_type, info):
|
|
name = element_type + 'List' # reserved by check_defn_name_str()
|
|
if not self.lookup_type(name):
|
|
self._def_entity(QAPISchemaArrayType(name, info, element_type))
|
|
return name
|
|
|
|
def _make_implicit_object_type(self, name, info, doc, ifcond,
|
|
role, members):
|
|
if not members:
|
|
return None
|
|
# See also QAPISchemaObjectTypeMember.describe()
|
|
name = 'q_obj_%s-%s' % (name, role)
|
|
typ = self.lookup_entity(name, QAPISchemaObjectType)
|
|
if typ:
|
|
# The implicit object type has multiple users. This can
|
|
# happen only for simple unions' implicit wrapper types.
|
|
# Its ifcond should be the disjunction of its user's
|
|
# ifconds. Not implemented. Instead, we always pass the
|
|
# wrapped type's ifcond, which is trivially the same for all
|
|
# users. It's also necessary for the wrapper to compile.
|
|
# But it's not tight: the disjunction need not imply it. We
|
|
# may end up compiling useless wrapper types.
|
|
# TODO kill simple unions or implement the disjunction
|
|
assert (ifcond or []) == typ._ifcond # pylint: disable=protected-access
|
|
else:
|
|
self._def_entity(QAPISchemaObjectType(name, info, doc, ifcond,
|
|
None, members, None, []))
|
|
return name
|
|
|
|
def _def_enum_type(self, expr, info, doc):
|
|
name = expr['enum']
|
|
data = expr['data']
|
|
prefix = expr.get('prefix')
|
|
ifcond = expr.get('if')
|
|
self._def_entity(QAPISchemaEnumType(
|
|
name, info, doc, ifcond,
|
|
self._make_enum_members(data, info), prefix))
|
|
|
|
def _make_member(self, name, typ, ifcond, 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, info, typ, optional, ifcond)
|
|
|
|
def _make_members(self, data, info):
|
|
return [self._make_member(key, value['type'], value.get('if'), info)
|
|
for (key, value) in data.items()]
|
|
|
|
def _def_struct_type(self, expr, info, doc):
|
|
name = expr['struct']
|
|
base = expr.get('base')
|
|
data = expr['data']
|
|
ifcond = expr.get('if')
|
|
features = expr.get('features', [])
|
|
self._def_entity(QAPISchemaObjectType(
|
|
name, info, doc, ifcond, base,
|
|
self._make_members(data, info),
|
|
None,
|
|
self._make_features(features, info)))
|
|
|
|
def _make_variant(self, case, typ, ifcond, info):
|
|
return QAPISchemaObjectTypeVariant(case, info, typ, ifcond)
|
|
|
|
def _make_simple_variant(self, case, typ, ifcond, 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, None, self.lookup_type(typ),
|
|
'wrapper', [self._make_member('data', typ, None, info)])
|
|
return QAPISchemaObjectTypeVariant(case, info, typ, ifcond)
|
|
|
|
def _def_union_type(self, expr, info, doc):
|
|
name = expr['union']
|
|
data = expr['data']
|
|
base = expr.get('base')
|
|
ifcond = expr.get('if')
|
|
tag_name = expr.get('discriminator')
|
|
tag_member = None
|
|
if isinstance(base, dict):
|
|
base = self._make_implicit_object_type(
|
|
name, info, doc, ifcond,
|
|
'base', self._make_members(base, info))
|
|
if tag_name:
|
|
variants = [self._make_variant(key, value['type'],
|
|
value.get('if'), info)
|
|
for (key, value) in data.items()]
|
|
members = []
|
|
else:
|
|
variants = [self._make_simple_variant(key, value['type'],
|
|
value.get('if'), info)
|
|
for (key, value) in data.items()]
|
|
enum = [{'name': v.name, 'if': v.ifcond} for v in variants]
|
|
typ = self._make_implicit_enum_type(name, info, ifcond, enum)
|
|
tag_member = QAPISchemaObjectTypeMember('type', info, typ, False)
|
|
members = [tag_member]
|
|
self._def_entity(
|
|
QAPISchemaObjectType(name, info, doc, ifcond, base, members,
|
|
QAPISchemaObjectTypeVariants(
|
|
tag_name, info, tag_member, variants),
|
|
[]))
|
|
|
|
def _def_alternate_type(self, expr, info, doc):
|
|
name = expr['alternate']
|
|
data = expr['data']
|
|
ifcond = expr.get('if')
|
|
variants = [self._make_variant(key, value['type'], value.get('if'),
|
|
info)
|
|
for (key, value) in data.items()]
|
|
tag_member = QAPISchemaObjectTypeMember('type', info, 'QType', False)
|
|
self._def_entity(
|
|
QAPISchemaAlternateType(name, info, doc, ifcond,
|
|
QAPISchemaObjectTypeVariants(
|
|
None, info, tag_member, variants)))
|
|
|
|
def _def_command(self, expr, info, doc):
|
|
name = expr['command']
|
|
data = expr.get('data')
|
|
rets = expr.get('returns')
|
|
gen = expr.get('gen', True)
|
|
success_response = expr.get('success-response', True)
|
|
boxed = expr.get('boxed', False)
|
|
allow_oob = expr.get('allow-oob', False)
|
|
allow_preconfig = expr.get('allow-preconfig', False)
|
|
ifcond = expr.get('if')
|
|
if isinstance(data, OrderedDict):
|
|
data = self._make_implicit_object_type(
|
|
name, info, doc, ifcond, '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, doc, ifcond, data, rets,
|
|
gen, success_response,
|
|
boxed, allow_oob, allow_preconfig))
|
|
|
|
def _def_event(self, expr, info, doc):
|
|
name = expr['event']
|
|
data = expr.get('data')
|
|
boxed = expr.get('boxed', False)
|
|
ifcond = expr.get('if')
|
|
if isinstance(data, OrderedDict):
|
|
data = self._make_implicit_object_type(
|
|
name, info, doc, ifcond, 'arg', self._make_members(data, info))
|
|
self._def_entity(QAPISchemaEvent(name, info, doc, ifcond, data, boxed))
|
|
|
|
def _def_exprs(self, exprs):
|
|
for expr_elem in exprs:
|
|
expr = expr_elem['expr']
|
|
info = expr_elem['info']
|
|
doc = expr_elem.get('doc')
|
|
if 'enum' in expr:
|
|
self._def_enum_type(expr, info, doc)
|
|
elif 'struct' in expr:
|
|
self._def_struct_type(expr, info, doc)
|
|
elif 'union' in expr:
|
|
self._def_union_type(expr, info, doc)
|
|
elif 'alternate' in expr:
|
|
self._def_alternate_type(expr, info, doc)
|
|
elif 'command' in expr:
|
|
self._def_command(expr, info, doc)
|
|
elif 'event' in expr:
|
|
self._def_event(expr, info, doc)
|
|
elif 'include' in expr:
|
|
self._def_include(expr, info, doc)
|
|
else:
|
|
assert False
|
|
|
|
def check(self):
|
|
for ent in self._entity_list:
|
|
ent.check(self)
|
|
|
|
def visit(self, visitor):
|
|
visitor.visit_begin(self)
|
|
module = None
|
|
visitor.visit_module(module)
|
|
for entity in self._entity_list:
|
|
if visitor.visit_needed(entity):
|
|
if entity.module != module:
|
|
module = entity.module
|
|
visitor.visit_module(module)
|
|
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 = ''
|
|
length = len(c_fun_str)
|
|
for i in range(length):
|
|
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 < length - 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) + '_' + c_name(const_name, False).upper()
|
|
|
|
|
|
if hasattr(str, 'maketrans'):
|
|
c_name_trans = str.maketrans('.-', '__')
|
|
else:
|
|
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', 'mips', 'sparc', 'i386'])
|
|
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(r'^(?!(#|$))', re.MULTILINE),
|
|
indent, raw)
|
|
raw = raw[0]
|
|
return re.sub(re.escape(eatspace) + r' *', '', raw)
|
|
|
|
|
|
def mcgen(code, **kwds):
|
|
if code[0] == '\n':
|
|
code = code[1:]
|
|
return cgen(code, **kwds)
|
|
|
|
|
|
def c_fname(filename):
|
|
return re.sub(r'[^A-Za-z0-9_]', '_', filename)
|
|
|
|
|
|
def guardstart(name):
|
|
return mcgen('''
|
|
#ifndef %(name)s
|
|
#define %(name)s
|
|
|
|
''',
|
|
name=c_fname(name).upper())
|
|
|
|
|
|
def guardend(name):
|
|
return mcgen('''
|
|
|
|
#endif /* %(name)s */
|
|
''',
|
|
name=c_fname(name).upper())
|
|
|
|
|
|
def gen_if(ifcond):
|
|
ret = ''
|
|
for ifc in ifcond:
|
|
ret += mcgen('''
|
|
#if %(cond)s
|
|
''', cond=ifc)
|
|
return ret
|
|
|
|
|
|
def gen_endif(ifcond):
|
|
ret = ''
|
|
for ifc in reversed(ifcond):
|
|
ret += mcgen('''
|
|
#endif /* %(cond)s */
|
|
''', cond=ifc)
|
|
return ret
|
|
|
|
|
|
def _wrap_ifcond(ifcond, before, after):
|
|
if before == after:
|
|
return after # suppress empty #if ... #endif
|
|
|
|
assert after.startswith(before)
|
|
out = before
|
|
added = after[len(before):]
|
|
if added[0] == '\n':
|
|
out += '\n'
|
|
added = added[1:]
|
|
out += gen_if(ifcond)
|
|
out += added
|
|
out += gen_endif(ifcond)
|
|
return out
|
|
|
|
|
|
def gen_enum_lookup(name, members, prefix=None):
|
|
ret = mcgen('''
|
|
|
|
const QEnumLookup %(c_name)s_lookup = {
|
|
.array = (const char *const[]) {
|
|
''',
|
|
c_name=c_name(name))
|
|
for m in members:
|
|
ret += gen_if(m.ifcond)
|
|
index = c_enum_const(name, m.name, prefix)
|
|
ret += mcgen('''
|
|
[%(index)s] = "%(name)s",
|
|
''',
|
|
index=index, name=m.name)
|
|
ret += gen_endif(m.ifcond)
|
|
|
|
ret += mcgen('''
|
|
},
|
|
.size = %(max_index)s
|
|
};
|
|
''',
|
|
max_index=c_enum_const(name, '_MAX', prefix))
|
|
return ret
|
|
|
|
|
|
def gen_enum(name, members, prefix=None):
|
|
# append automatically generated _MAX value
|
|
enum_members = members + [QAPISchemaEnumMember('_MAX', None)]
|
|
|
|
ret = mcgen('''
|
|
|
|
typedef enum %(c_name)s {
|
|
''',
|
|
c_name=c_name(name))
|
|
|
|
for m in enum_members:
|
|
ret += gen_if(m.ifcond)
|
|
ret += mcgen('''
|
|
%(c_enum)s,
|
|
''',
|
|
c_enum=c_enum_const(name, m.name, prefix))
|
|
ret += gen_endif(m.ifcond)
|
|
|
|
ret += mcgen('''
|
|
} %(c_name)s;
|
|
''',
|
|
c_name=c_name(name))
|
|
|
|
ret += mcgen('''
|
|
|
|
#define %(c_name)s_str(val) \\
|
|
qapi_enum_lookup(&%(c_name)s_lookup, (val))
|
|
|
|
extern const QEnumLookup %(c_name)s_lookup;
|
|
''',
|
|
c_name=c_name(name))
|
|
return ret
|
|
|
|
|
|
def build_params(arg_type, boxed, extra=None):
|
|
ret = ''
|
|
sep = ''
|
|
if boxed:
|
|
assert arg_type
|
|
ret += '%s arg' % arg_type.c_param_type()
|
|
sep = ', '
|
|
elif arg_type:
|
|
assert not arg_type.variants
|
|
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_param_type(),
|
|
c_name(memb.name))
|
|
if extra:
|
|
ret += sep + extra
|
|
return ret if ret else 'void'
|
|
|
|
|
|
#
|
|
# Accumulate and write output
|
|
#
|
|
|
|
class QAPIGen(object):
|
|
|
|
def __init__(self, fname):
|
|
self.fname = fname
|
|
self._preamble = ''
|
|
self._body = ''
|
|
|
|
def preamble_add(self, text):
|
|
self._preamble += text
|
|
|
|
def add(self, text):
|
|
self._body += text
|
|
|
|
def get_content(self):
|
|
return self._top() + self._preamble + self._body + self._bottom()
|
|
|
|
def _top(self):
|
|
return ''
|
|
|
|
def _bottom(self):
|
|
return ''
|
|
|
|
def write(self, output_dir):
|
|
pathname = os.path.join(output_dir, self.fname)
|
|
dir = os.path.dirname(pathname)
|
|
if dir:
|
|
try:
|
|
os.makedirs(dir)
|
|
except os.error as e:
|
|
if e.errno != errno.EEXIST:
|
|
raise
|
|
fd = os.open(pathname, os.O_RDWR | os.O_CREAT, 0o666)
|
|
if sys.version_info[0] >= 3:
|
|
f = open(fd, 'r+', encoding='utf-8')
|
|
else:
|
|
f = os.fdopen(fd, 'r+')
|
|
text = self.get_content()
|
|
oldtext = f.read(len(text) + 1)
|
|
if text != oldtext:
|
|
f.seek(0)
|
|
f.truncate(0)
|
|
f.write(text)
|
|
f.close()
|
|
|
|
|
|
@contextmanager
|
|
def ifcontext(ifcond, *args):
|
|
"""A 'with' statement context manager to wrap with start_if()/end_if()
|
|
|
|
*args: any number of QAPIGenCCode
|
|
|
|
Example::
|
|
|
|
with ifcontext(ifcond, self._genh, self._genc):
|
|
modify self._genh and self._genc ...
|
|
|
|
Is equivalent to calling::
|
|
|
|
self._genh.start_if(ifcond)
|
|
self._genc.start_if(ifcond)
|
|
modify self._genh and self._genc ...
|
|
self._genh.end_if()
|
|
self._genc.end_if()
|
|
"""
|
|
for arg in args:
|
|
arg.start_if(ifcond)
|
|
yield
|
|
for arg in args:
|
|
arg.end_if()
|
|
|
|
|
|
class QAPIGenCCode(QAPIGen):
|
|
|
|
def __init__(self, fname):
|
|
QAPIGen.__init__(self, fname)
|
|
self._start_if = None
|
|
|
|
def start_if(self, ifcond):
|
|
assert self._start_if is None
|
|
self._start_if = (ifcond, self._body, self._preamble)
|
|
|
|
def end_if(self):
|
|
assert self._start_if
|
|
self._wrap_ifcond()
|
|
self._start_if = None
|
|
|
|
def _wrap_ifcond(self):
|
|
self._body = _wrap_ifcond(self._start_if[0],
|
|
self._start_if[1], self._body)
|
|
self._preamble = _wrap_ifcond(self._start_if[0],
|
|
self._start_if[2], self._preamble)
|
|
|
|
def get_content(self):
|
|
assert self._start_if is None
|
|
return QAPIGen.get_content(self)
|
|
|
|
|
|
class QAPIGenC(QAPIGenCCode):
|
|
|
|
def __init__(self, fname, blurb, pydoc):
|
|
QAPIGenCCode.__init__(self, fname)
|
|
self._blurb = blurb
|
|
self._copyright = '\n * '.join(re.findall(r'^Copyright .*', pydoc,
|
|
re.MULTILINE))
|
|
|
|
def _top(self):
|
|
return mcgen('''
|
|
/* AUTOMATICALLY GENERATED, DO NOT MODIFY */
|
|
|
|
/*
|
|
%(blurb)s
|
|
*
|
|
* %(copyright)s
|
|
*
|
|
* This work is licensed under the terms of the GNU LGPL, version 2.1 or later.
|
|
* See the COPYING.LIB file in the top-level directory.
|
|
*/
|
|
|
|
''',
|
|
blurb=self._blurb, copyright=self._copyright)
|
|
|
|
def _bottom(self):
|
|
return mcgen('''
|
|
|
|
/* Dummy declaration to prevent empty .o file */
|
|
char qapi_dummy_%(name)s;
|
|
''',
|
|
name=c_fname(self.fname))
|
|
|
|
|
|
class QAPIGenH(QAPIGenC):
|
|
|
|
def _top(self):
|
|
return QAPIGenC._top(self) + guardstart(self.fname)
|
|
|
|
def _bottom(self):
|
|
return guardend(self.fname)
|
|
|
|
|
|
class QAPIGenDoc(QAPIGen):
|
|
|
|
def _top(self):
|
|
return (QAPIGen._top(self)
|
|
+ '@c AUTOMATICALLY GENERATED, DO NOT MODIFY\n\n')
|
|
|
|
|
|
class QAPISchemaMonolithicCVisitor(QAPISchemaVisitor):
|
|
|
|
def __init__(self, prefix, what, blurb, pydoc):
|
|
self._prefix = prefix
|
|
self._what = what
|
|
self._genc = QAPIGenC(self._prefix + self._what + '.c',
|
|
blurb, pydoc)
|
|
self._genh = QAPIGenH(self._prefix + self._what + '.h',
|
|
blurb, pydoc)
|
|
|
|
def write(self, output_dir):
|
|
self._genc.write(output_dir)
|
|
self._genh.write(output_dir)
|
|
|
|
|
|
class QAPISchemaModularCVisitor(QAPISchemaVisitor):
|
|
|
|
def __init__(self, prefix, what, blurb, pydoc):
|
|
self._prefix = prefix
|
|
self._what = what
|
|
self._blurb = blurb
|
|
self._pydoc = pydoc
|
|
self._genc = None
|
|
self._genh = None
|
|
self._module = {}
|
|
self._main_module = None
|
|
|
|
@staticmethod
|
|
def _is_user_module(name):
|
|
return name and not name.startswith('./')
|
|
|
|
@staticmethod
|
|
def _is_builtin_module(name):
|
|
return not name
|
|
|
|
def _module_dirname(self, what, name):
|
|
if self._is_user_module(name):
|
|
return os.path.dirname(name)
|
|
return ''
|
|
|
|
def _module_basename(self, what, name):
|
|
ret = '' if self._is_builtin_module(name) else self._prefix
|
|
if self._is_user_module(name):
|
|
basename = os.path.basename(name)
|
|
ret += what
|
|
if name != self._main_module:
|
|
ret += '-' + os.path.splitext(basename)[0]
|
|
else:
|
|
name = name[2:] if name else 'builtin'
|
|
ret += re.sub(r'-', '-' + name + '-', what)
|
|
return ret
|
|
|
|
def _module_filename(self, what, name):
|
|
return os.path.join(self._module_dirname(what, name),
|
|
self._module_basename(what, name))
|
|
|
|
def _add_module(self, name, blurb):
|
|
basename = self._module_filename(self._what, name)
|
|
genc = QAPIGenC(basename + '.c', blurb, self._pydoc)
|
|
genh = QAPIGenH(basename + '.h', blurb, self._pydoc)
|
|
self._module[name] = (genc, genh)
|
|
self._set_module(name)
|
|
|
|
def _add_user_module(self, name, blurb):
|
|
assert self._is_user_module(name)
|
|
if self._main_module is None:
|
|
self._main_module = name
|
|
self._add_module(name, blurb)
|
|
|
|
def _add_system_module(self, name, blurb):
|
|
self._add_module(name and './' + name, blurb)
|
|
|
|
def _set_module(self, name):
|
|
self._genc, self._genh = self._module[name]
|
|
|
|
def write(self, output_dir, opt_builtins=False):
|
|
for name in self._module:
|
|
if self._is_builtin_module(name) and not opt_builtins:
|
|
continue
|
|
(genc, genh) = self._module[name]
|
|
genc.write(output_dir)
|
|
genh.write(output_dir)
|
|
|
|
def _begin_user_module(self, name):
|
|
pass
|
|
|
|
def visit_module(self, name):
|
|
if name in self._module:
|
|
self._set_module(name)
|
|
elif self._is_builtin_module(name):
|
|
# The built-in module has not been created. No code may
|
|
# be generated.
|
|
self._genc = None
|
|
self._genh = None
|
|
else:
|
|
self._add_user_module(name, self._blurb)
|
|
self._begin_user_module(name)
|
|
|
|
def visit_include(self, name, info):
|
|
relname = os.path.relpath(self._module_filename(self._what, name),
|
|
os.path.dirname(self._genh.fname))
|
|
self._genh.preamble_add(mcgen('''
|
|
#include "%(relname)s.h"
|
|
''',
|
|
relname=relname))
|