eddf817bd8
check_type() first checks and peels off the array type, then checks
the element type. For two out of four error messages, it takes pains
to report errors for "array of T" instead of just T. Odd. Let's
examine the errors.
* Unknown element type, e.g.
tests/qapi-schema/args-array-unknown.json:
Member 'array' of 'data' for command 'oops' uses unknown type
'array of NoSuchType'
To make sense of this, you need to know that 'array of NoSuchType'
refers to '[NoSuchType]'. Easy enough. However, simply reporting
Member 'array' of 'data' for command 'oops' uses unknown type
'NoSuchType'
is at least as easy to understand.
* Element type's meta-type is inadmissible, e.g.
tests/qapi-schema/returns-whitelist.json:
'returns' for command 'no-way-this-will-get-whitelisted' cannot
use built-in type 'array of int'
'array of int' is technically not a built-in type, but that's
pedantry. However, simply reporting
'returns' for command 'no-way-this-will-get-whitelisted' cannot
use built-in type 'int'
avoids the issue, and is at least as easy to understand.
* The remaining two errors are unreachable, because the array checking
ensures that value is a string.
Thus, reporting some errors for "array of T" instead of just T works,
but doesn't really improve things. Drop it.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
1077 lines
37 KiB
Python
1077 lines
37 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) 2013-2015 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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import re
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from ordereddict import OrderedDict
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import errno
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import getopt
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import os
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import sys
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import string
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builtin_types = {
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'str': 'QTYPE_QSTRING',
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'int': 'QTYPE_QINT',
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'number': 'QTYPE_QFLOAT',
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'bool': 'QTYPE_QBOOL',
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'int8': 'QTYPE_QINT',
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'int16': 'QTYPE_QINT',
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'int32': 'QTYPE_QINT',
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'int64': 'QTYPE_QINT',
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'uint8': 'QTYPE_QINT',
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'uint16': 'QTYPE_QINT',
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'uint32': 'QTYPE_QINT',
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'uint64': 'QTYPE_QINT',
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'size': 'QTYPE_QINT',
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}
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# Whitelist of commands allowed to return a non-dictionary
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returns_whitelist = [
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# From QMP:
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'human-monitor-command',
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'query-migrate-cache-size',
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'query-tpm-models',
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'query-tpm-types',
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'ringbuf-read',
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# From QGA:
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'guest-file-open',
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'guest-fsfreeze-freeze',
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'guest-fsfreeze-freeze-list',
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'guest-fsfreeze-status',
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'guest-fsfreeze-thaw',
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'guest-get-time',
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'guest-set-vcpus',
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'guest-sync',
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'guest-sync-delimited',
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# From qapi-schema-test:
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'user_def_cmd3',
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]
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enum_types = []
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struct_types = []
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union_types = []
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events = []
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all_names = {}
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#
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# Parsing the schema into expressions
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#
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def error_path(parent):
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res = ""
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while parent:
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res = ("In file included from %s:%d:\n" % (parent['file'],
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parent['line'])) + res
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parent = parent['parent']
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return res
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class QAPISchemaError(Exception):
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def __init__(self, schema, msg):
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self.fname = schema.fname
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self.msg = msg
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self.col = 1
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self.line = schema.line
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for ch in schema.src[schema.line_pos:schema.pos]:
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if ch == '\t':
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self.col = (self.col + 7) % 8 + 1
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else:
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self.col += 1
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self.info = schema.incl_info
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def __str__(self):
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return error_path(self.info) + \
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"%s:%d:%d: %s" % (self.fname, self.line, self.col, self.msg)
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class QAPIExprError(Exception):
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def __init__(self, expr_info, msg):
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self.info = expr_info
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self.msg = msg
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def __str__(self):
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return error_path(self.info['parent']) + \
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"%s:%d: %s" % (self.info['file'], self.info['line'], self.msg)
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class QAPISchema:
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def __init__(self, fp, previously_included = [], incl_info = None):
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abs_fname = os.path.abspath(fp.name)
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fname = fp.name
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self.fname = fname
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previously_included.append(abs_fname)
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self.incl_info = incl_info
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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.line = 1
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self.line_pos = 0
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self.exprs = []
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self.accept()
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while self.tok != None:
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expr_info = {'file': fname, 'line': self.line,
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'parent': self.incl_info}
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expr = self.get_expr(False)
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if isinstance(expr, dict) and "include" in expr:
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if len(expr) != 1:
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raise QAPIExprError(expr_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 QAPIExprError(expr_info,
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'Expected a file name (string), got: %s'
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% include)
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incl_abs_fname = os.path.join(os.path.dirname(abs_fname),
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include)
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# catch inclusion cycle
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inf = expr_info
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while inf:
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if incl_abs_fname == os.path.abspath(inf['file']):
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raise QAPIExprError(expr_info, "Inclusion loop for %s"
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% 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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continue
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try:
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fobj = open(incl_abs_fname, 'r')
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except IOError, e:
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raise QAPIExprError(expr_info,
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'%s: %s' % (e.strerror, include))
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exprs_include = QAPISchema(fobj, previously_included,
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expr_info)
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self.exprs.extend(exprs_include.exprs)
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else:
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expr_elem = {'expr': expr,
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'info': expr_info}
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self.exprs.append(expr_elem)
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def accept(self):
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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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if self.tok == '#':
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self.cursor = self.src.find('\n', self.cursor)
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elif self.tok in ['{', '}', ':', ',', '[', ']']:
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return
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elif self.tok == "'":
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string = ''
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esc = False
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while True:
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ch = self.src[self.cursor]
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self.cursor += 1
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if ch == '\n':
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raise QAPISchemaError(self,
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'Missing terminating "\'"')
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if esc:
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if ch == 'b':
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string += '\b'
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elif ch == 'f':
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string += '\f'
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elif ch == 'n':
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string += '\n'
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elif ch == 'r':
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string += '\r'
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elif ch == 't':
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string += '\t'
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elif ch == 'u':
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value = 0
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for x in range(0, 4):
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ch = self.src[self.cursor]
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self.cursor += 1
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if ch not in "0123456789abcdefABCDEF":
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raise QAPISchemaError(self,
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'\\u escape needs 4 '
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'hex digits')
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value = (value << 4) + int(ch, 16)
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# If Python 2 and 3 didn't disagree so much on
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# how to handle Unicode, then we could allow
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# Unicode string defaults. But most of QAPI is
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# ASCII-only, so we aren't losing much for now.
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if not value or value > 0x7f:
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raise QAPISchemaError(self,
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'For now, \\u escape '
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'only supports non-zero '
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'values up to \\u007f')
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string += chr(value)
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elif ch in "\\/'\"":
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string += ch
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else:
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raise QAPISchemaError(self,
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"Unknown escape \\%s" %ch)
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esc = False
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elif ch == "\\":
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esc = True
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elif ch == "'":
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self.val = string
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return
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else:
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string += ch
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elif self.src.startswith("true", self.pos):
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self.val = True
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self.cursor += 3
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return
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elif self.src.startswith("false", self.pos):
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self.val = False
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self.cursor += 4
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return
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elif self.src.startswith("null", self.pos):
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self.val = None
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self.cursor += 3
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return
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elif self.tok == '\n':
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if self.cursor == len(self.src):
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self.tok = None
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return
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self.line += 1
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self.line_pos = self.cursor
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elif not self.tok.isspace():
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raise QAPISchemaError(self, 'Stray "%s"' % self.tok)
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def get_members(self):
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expr = OrderedDict()
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if self.tok == '}':
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self.accept()
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return expr
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if self.tok != "'":
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raise QAPISchemaError(self, 'Expected string or "}"')
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while True:
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key = self.val
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self.accept()
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if self.tok != ':':
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raise QAPISchemaError(self, 'Expected ":"')
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self.accept()
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if key in expr:
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raise QAPISchemaError(self, 'Duplicate key "%s"' % key)
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expr[key] = self.get_expr(True)
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if self.tok == '}':
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self.accept()
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return expr
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if self.tok != ',':
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raise QAPISchemaError(self, 'Expected "," or "}"')
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self.accept()
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if self.tok != "'":
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raise QAPISchemaError(self, 'Expected string')
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def get_values(self):
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expr = []
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if self.tok == ']':
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self.accept()
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return expr
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if not self.tok in "{['tfn":
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raise QAPISchemaError(self, 'Expected "{", "[", "]", string, '
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'boolean or "null"')
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while True:
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expr.append(self.get_expr(True))
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if self.tok == ']':
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self.accept()
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return expr
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if self.tok != ',':
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raise QAPISchemaError(self, 'Expected "," or "]"')
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self.accept()
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def get_expr(self, nested):
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if self.tok != '{' and not nested:
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raise QAPISchemaError(self, 'Expected "{"')
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if self.tok == '{':
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self.accept()
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expr = self.get_members()
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elif self.tok == '[':
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self.accept()
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expr = self.get_values()
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elif self.tok in "'tfn":
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expr = self.val
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self.accept()
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else:
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raise QAPISchemaError(self, 'Expected "{", "[" or string')
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return expr
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#
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# Semantic analysis of schema expressions
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#
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def find_base_fields(base):
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base_struct_define = find_struct(base)
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if not base_struct_define:
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return None
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return base_struct_define['data']
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# Return the qtype of an alternate branch, or None on error.
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def find_alternate_member_qtype(qapi_type):
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if builtin_types.has_key(qapi_type):
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return builtin_types[qapi_type]
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elif find_struct(qapi_type):
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return "QTYPE_QDICT"
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elif find_enum(qapi_type):
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return "QTYPE_QSTRING"
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elif find_union(qapi_type):
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return "QTYPE_QDICT"
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return None
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|
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# Return the discriminator enum define if discriminator is specified as an
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# enum type, otherwise return None.
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def discriminator_find_enum_define(expr):
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base = expr.get('base')
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discriminator = expr.get('discriminator')
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if not (discriminator and base):
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return None
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base_fields = find_base_fields(base)
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if not base_fields:
|
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return None
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|
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discriminator_type = base_fields.get(discriminator)
|
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if not discriminator_type:
|
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return None
|
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|
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return find_enum(discriminator_type)
|
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|
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# FIXME should enforce "other than downstream extensions [...], all
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# names should begin with a letter".
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valid_name = re.compile('^[a-zA-Z_][a-zA-Z0-9_.-]*$')
|
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def check_name(expr_info, source, name, allow_optional = False,
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enum_member = False):
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global valid_name
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membername = name
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if not isinstance(name, str):
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raise QAPIExprError(expr_info,
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"%s requires a string name" % source)
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if name.startswith('*'):
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membername = name[1:]
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if not allow_optional:
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raise QAPIExprError(expr_info,
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"%s does not allow optional name '%s'"
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% (source, name))
|
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# Enum members can start with a digit, because the generated C
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# code always prefixes it with the enum name
|
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if enum_member:
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membername = '_' + membername
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if not valid_name.match(membername):
|
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raise QAPIExprError(expr_info,
|
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"%s uses invalid name '%s'" % (source, name))
|
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|
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def add_name(name, info, meta, implicit = False):
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global all_names
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check_name(info, "'%s'" % meta, name)
|
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# FIXME should reject names that differ only in '_' vs. '.'
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# vs. '-', because they're liable to clash in generated C.
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if name in all_names:
|
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raise QAPIExprError(info,
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"%s '%s' is already defined"
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% (all_names[name], name))
|
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if not implicit and name[-4:] == 'Kind':
|
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raise QAPIExprError(info,
|
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"%s '%s' should not end in 'Kind'"
|
|
% (meta, name))
|
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all_names[name] = meta
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|
|
def add_struct(definition, info):
|
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global struct_types
|
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name = definition['struct']
|
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add_name(name, info, 'struct')
|
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struct_types.append(definition)
|
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|
|
def find_struct(name):
|
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global struct_types
|
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for struct in struct_types:
|
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if struct['struct'] == name:
|
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return struct
|
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return None
|
|
|
|
def add_union(definition, info):
|
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global union_types
|
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name = definition['union']
|
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add_name(name, info, 'union')
|
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union_types.append(definition)
|
|
|
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def find_union(name):
|
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global union_types
|
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for union in union_types:
|
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if union['union'] == name:
|
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return union
|
|
return None
|
|
|
|
def add_enum(name, info, enum_values = None, implicit = False):
|
|
global enum_types
|
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add_name(name, info, 'enum', implicit)
|
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enum_types.append({"enum_name": name, "enum_values": enum_values})
|
|
|
|
def find_enum(name):
|
|
global enum_types
|
|
for enum in enum_types:
|
|
if enum['enum_name'] == name:
|
|
return enum
|
|
return None
|
|
|
|
def is_enum(name):
|
|
return find_enum(name) != None
|
|
|
|
def check_type(expr_info, source, value, allow_array = False,
|
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allow_dict = False, allow_optional = False,
|
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allow_star = False, allow_metas = []):
|
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global all_names
|
|
|
|
if value is None:
|
|
return
|
|
|
|
if allow_star and value == '**':
|
|
return
|
|
|
|
# Check if array type for value is okay
|
|
if isinstance(value, list):
|
|
if not allow_array:
|
|
raise QAPIExprError(expr_info,
|
|
"%s cannot be an array" % source)
|
|
if len(value) != 1 or not isinstance(value[0], str):
|
|
raise QAPIExprError(expr_info,
|
|
"%s: array type must contain single type name"
|
|
% source)
|
|
value = value[0]
|
|
|
|
# Check if type name for value is okay
|
|
if isinstance(value, str):
|
|
if value == '**':
|
|
raise QAPIExprError(expr_info,
|
|
"%s uses '**' but did not request 'gen':false"
|
|
% source)
|
|
if not value in all_names:
|
|
raise QAPIExprError(expr_info,
|
|
"%s uses unknown type '%s'"
|
|
% (source, value))
|
|
if not all_names[value] in allow_metas:
|
|
raise QAPIExprError(expr_info,
|
|
"%s cannot use %s type '%s'"
|
|
% (source, all_names[value], value))
|
|
return
|
|
|
|
if not allow_dict:
|
|
raise QAPIExprError(expr_info,
|
|
"%s should be a type name" % source)
|
|
|
|
if not isinstance(value, OrderedDict):
|
|
raise QAPIExprError(expr_info,
|
|
"%s should be a dictionary or type name" % source)
|
|
|
|
# value is a dictionary, check that each member is okay
|
|
for (key, arg) in value.items():
|
|
check_name(expr_info, "Member of %s" % source, key,
|
|
allow_optional=allow_optional)
|
|
# Todo: allow dictionaries to represent default values of
|
|
# an optional argument.
|
|
check_type(expr_info, "Member '%s' of %s" % (key, source), arg,
|
|
allow_array=True, allow_star=allow_star,
|
|
allow_metas=['built-in', 'union', 'alternate', 'struct',
|
|
'enum'])
|
|
|
|
def check_member_clash(expr_info, base_name, data, source = ""):
|
|
base = find_struct(base_name)
|
|
assert base
|
|
base_members = base['data']
|
|
for key in data.keys():
|
|
if key.startswith('*'):
|
|
key = key[1:]
|
|
if key in base_members or "*" + key in base_members:
|
|
raise QAPIExprError(expr_info,
|
|
"Member name '%s'%s clashes with base '%s'"
|
|
% (key, source, base_name))
|
|
if base.get('base'):
|
|
check_member_clash(expr_info, base['base'], data, source)
|
|
|
|
def check_command(expr, expr_info):
|
|
name = expr['command']
|
|
allow_star = expr.has_key('gen')
|
|
|
|
check_type(expr_info, "'data' for command '%s'" % name,
|
|
expr.get('data'), allow_dict=True, allow_optional=True,
|
|
allow_metas=['struct'], allow_star=allow_star)
|
|
returns_meta = ['union', 'struct']
|
|
if name in returns_whitelist:
|
|
returns_meta += ['built-in', 'alternate', 'enum']
|
|
check_type(expr_info, "'returns' for command '%s'" % name,
|
|
expr.get('returns'), allow_array=True,
|
|
allow_optional=True, allow_metas=returns_meta,
|
|
allow_star=allow_star)
|
|
|
|
def check_event(expr, expr_info):
|
|
global events
|
|
name = expr['event']
|
|
|
|
if name.upper() == 'MAX':
|
|
raise QAPIExprError(expr_info, "Event name 'MAX' cannot be created")
|
|
events.append(name)
|
|
check_type(expr_info, "'data' for event '%s'" % name,
|
|
expr.get('data'), allow_dict=True, allow_optional=True,
|
|
allow_metas=['struct'])
|
|
|
|
def check_union(expr, expr_info):
|
|
name = expr['union']
|
|
base = expr.get('base')
|
|
discriminator = expr.get('discriminator')
|
|
members = expr['data']
|
|
values = { 'MAX': '(automatic)' }
|
|
|
|
# Two types of unions, determined by discriminator.
|
|
|
|
# With no discriminator it is a simple union.
|
|
if discriminator is None:
|
|
enum_define = None
|
|
allow_metas=['built-in', 'union', 'alternate', 'struct', 'enum']
|
|
if base is not None:
|
|
raise QAPIExprError(expr_info,
|
|
"Simple union '%s' must not have a base"
|
|
% name)
|
|
|
|
# Else, it's a flat union.
|
|
else:
|
|
# The object must have a string member 'base'.
|
|
if not isinstance(base, str):
|
|
raise QAPIExprError(expr_info,
|
|
"Flat union '%s' must have a string base field"
|
|
% name)
|
|
base_fields = find_base_fields(base)
|
|
if not base_fields:
|
|
raise QAPIExprError(expr_info,
|
|
"Base '%s' is not a valid struct"
|
|
% base)
|
|
|
|
# The value of member 'discriminator' must name a non-optional
|
|
# member of the base struct.
|
|
check_name(expr_info, "Discriminator of flat union '%s'" % name,
|
|
discriminator)
|
|
discriminator_type = base_fields.get(discriminator)
|
|
if not discriminator_type:
|
|
raise QAPIExprError(expr_info,
|
|
"Discriminator '%s' is not a member of base "
|
|
"struct '%s'"
|
|
% (discriminator, base))
|
|
enum_define = find_enum(discriminator_type)
|
|
allow_metas=['struct']
|
|
# Do not allow string discriminator
|
|
if not enum_define:
|
|
raise QAPIExprError(expr_info,
|
|
"Discriminator '%s' must be of enumeration "
|
|
"type" % discriminator)
|
|
|
|
# Check every branch
|
|
for (key, value) in members.items():
|
|
check_name(expr_info, "Member of union '%s'" % name, key)
|
|
|
|
# Each value must name a known type; furthermore, in flat unions,
|
|
# branches must be a struct with no overlapping member names
|
|
check_type(expr_info, "Member '%s' of union '%s'" % (key, name),
|
|
value, allow_array=not base, allow_metas=allow_metas)
|
|
if base:
|
|
branch_struct = find_struct(value)
|
|
assert branch_struct
|
|
check_member_clash(expr_info, base, branch_struct['data'],
|
|
" of branch '%s'" % key)
|
|
|
|
# If the discriminator names an enum type, then all members
|
|
# of 'data' must also be members of the enum type.
|
|
if enum_define:
|
|
if not key in enum_define['enum_values']:
|
|
raise QAPIExprError(expr_info,
|
|
"Discriminator value '%s' is not found in "
|
|
"enum '%s'" %
|
|
(key, enum_define["enum_name"]))
|
|
|
|
# Otherwise, check for conflicts in the generated enum
|
|
else:
|
|
c_key = camel_to_upper(key)
|
|
if c_key in values:
|
|
raise QAPIExprError(expr_info,
|
|
"Union '%s' member '%s' clashes with '%s'"
|
|
% (name, key, values[c_key]))
|
|
values[c_key] = key
|
|
|
|
def check_alternate(expr, expr_info):
|
|
name = expr['alternate']
|
|
members = expr['data']
|
|
values = { 'MAX': '(automatic)' }
|
|
types_seen = {}
|
|
|
|
# Check every branch
|
|
for (key, value) in members.items():
|
|
check_name(expr_info, "Member of alternate '%s'" % name, key)
|
|
|
|
# Check for conflicts in the generated enum
|
|
c_key = camel_to_upper(key)
|
|
if c_key in values:
|
|
raise QAPIExprError(expr_info,
|
|
"Alternate '%s' member '%s' clashes with '%s'"
|
|
% (name, key, values[c_key]))
|
|
values[c_key] = key
|
|
|
|
# Ensure alternates have no type conflicts.
|
|
check_type(expr_info, "Member '%s' of alternate '%s'" % (key, name),
|
|
value,
|
|
allow_metas=['built-in', 'union', 'struct', 'enum'])
|
|
qtype = find_alternate_member_qtype(value)
|
|
assert qtype
|
|
if qtype in types_seen:
|
|
raise QAPIExprError(expr_info,
|
|
"Alternate '%s' member '%s' can't "
|
|
"be distinguished from member '%s'"
|
|
% (name, key, types_seen[qtype]))
|
|
types_seen[qtype] = key
|
|
|
|
def check_enum(expr, expr_info):
|
|
name = expr['enum']
|
|
members = expr.get('data')
|
|
values = { 'MAX': '(automatic)' }
|
|
|
|
if not isinstance(members, list):
|
|
raise QAPIExprError(expr_info,
|
|
"Enum '%s' requires an array for 'data'" % name)
|
|
for member in members:
|
|
check_name(expr_info, "Member of enum '%s'" %name, member,
|
|
enum_member=True)
|
|
key = camel_to_upper(member)
|
|
if key in values:
|
|
raise QAPIExprError(expr_info,
|
|
"Enum '%s' member '%s' clashes with '%s'"
|
|
% (name, member, values[key]))
|
|
values[key] = member
|
|
|
|
def check_struct(expr, expr_info):
|
|
name = expr['struct']
|
|
members = expr['data']
|
|
|
|
check_type(expr_info, "'data' for struct '%s'" % name, members,
|
|
allow_dict=True, allow_optional=True)
|
|
check_type(expr_info, "'base' for struct '%s'" % name, expr.get('base'),
|
|
allow_metas=['struct'])
|
|
if expr.get('base'):
|
|
check_member_clash(expr_info, expr['base'], expr['data'])
|
|
|
|
def check_keys(expr_elem, meta, required, optional=[]):
|
|
expr = expr_elem['expr']
|
|
info = expr_elem['info']
|
|
name = expr[meta]
|
|
if not isinstance(name, str):
|
|
raise QAPIExprError(info,
|
|
"'%s' key must have a string value" % meta)
|
|
required = required + [ meta ]
|
|
for (key, value) in expr.items():
|
|
if not key in required and not key in optional:
|
|
raise QAPIExprError(info,
|
|
"Unknown key '%s' in %s '%s'"
|
|
% (key, meta, name))
|
|
if (key == 'gen' or key == 'success-response') and value != False:
|
|
raise QAPIExprError(info,
|
|
"'%s' of %s '%s' should only use false value"
|
|
% (key, meta, name))
|
|
for key in required:
|
|
if not expr.has_key(key):
|
|
raise QAPIExprError(info,
|
|
"Key '%s' is missing from %s '%s'"
|
|
% (key, meta, name))
|
|
|
|
def check_exprs(exprs):
|
|
global all_names
|
|
|
|
# Learn the types and check for valid expression keys
|
|
for builtin in builtin_types.keys():
|
|
all_names[builtin] = 'built-in'
|
|
for expr_elem in exprs:
|
|
expr = expr_elem['expr']
|
|
info = expr_elem['info']
|
|
if expr.has_key('enum'):
|
|
check_keys(expr_elem, 'enum', ['data'])
|
|
add_enum(expr['enum'], info, expr['data'])
|
|
elif expr.has_key('union'):
|
|
check_keys(expr_elem, 'union', ['data'],
|
|
['base', 'discriminator'])
|
|
add_union(expr, info)
|
|
elif expr.has_key('alternate'):
|
|
check_keys(expr_elem, 'alternate', ['data'])
|
|
add_name(expr['alternate'], info, 'alternate')
|
|
elif expr.has_key('struct'):
|
|
check_keys(expr_elem, 'struct', ['data'], ['base'])
|
|
add_struct(expr, info)
|
|
elif expr.has_key('command'):
|
|
check_keys(expr_elem, 'command', [],
|
|
['data', 'returns', 'gen', 'success-response'])
|
|
add_name(expr['command'], info, 'command')
|
|
elif expr.has_key('event'):
|
|
check_keys(expr_elem, 'event', [], ['data'])
|
|
add_name(expr['event'], info, 'event')
|
|
else:
|
|
raise QAPIExprError(expr_elem['info'],
|
|
"Expression is missing metatype")
|
|
|
|
# Try again for hidden UnionKind enum
|
|
for expr_elem in exprs:
|
|
expr = expr_elem['expr']
|
|
if expr.has_key('union'):
|
|
if not discriminator_find_enum_define(expr):
|
|
add_enum('%sKind' % expr['union'], expr_elem['info'],
|
|
implicit=True)
|
|
elif expr.has_key('alternate'):
|
|
add_enum('%sKind' % expr['alternate'], expr_elem['info'],
|
|
implicit=True)
|
|
|
|
# Validate that exprs make sense
|
|
for expr_elem in exprs:
|
|
expr = expr_elem['expr']
|
|
info = expr_elem['info']
|
|
|
|
if expr.has_key('enum'):
|
|
check_enum(expr, info)
|
|
elif expr.has_key('union'):
|
|
check_union(expr, info)
|
|
elif expr.has_key('alternate'):
|
|
check_alternate(expr, info)
|
|
elif expr.has_key('struct'):
|
|
check_struct(expr, info)
|
|
elif expr.has_key('command'):
|
|
check_command(expr, info)
|
|
elif expr.has_key('event'):
|
|
check_event(expr, info)
|
|
else:
|
|
assert False, 'unexpected meta type'
|
|
|
|
return map(lambda expr_elem: expr_elem['expr'], exprs)
|
|
|
|
def parse_schema(fname):
|
|
try:
|
|
schema = QAPISchema(open(fname, "r"))
|
|
return check_exprs(schema.exprs)
|
|
except (QAPISchemaError, QAPIExprError), e:
|
|
print >>sys.stderr, e
|
|
exit(1)
|
|
|
|
#
|
|
# Code generation helpers
|
|
#
|
|
|
|
def parse_args(typeinfo):
|
|
if isinstance(typeinfo, str):
|
|
struct = find_struct(typeinfo)
|
|
assert struct != None
|
|
typeinfo = struct['data']
|
|
|
|
for member in typeinfo:
|
|
argname = member
|
|
argentry = typeinfo[member]
|
|
optional = False
|
|
if member.startswith('*'):
|
|
argname = member[1:]
|
|
optional = True
|
|
# Todo: allow argentry to be OrderedDict, for providing the
|
|
# value of an optional argument.
|
|
yield (argname, argentry, optional)
|
|
|
|
def camel_case(name):
|
|
new_name = ''
|
|
first = True
|
|
for ch in name:
|
|
if ch in ['_', '-']:
|
|
first = True
|
|
elif first:
|
|
new_name += ch.upper()
|
|
first = False
|
|
else:
|
|
new_name += ch.lower()
|
|
return new_name
|
|
|
|
# ENUMName -> ENUM_NAME, EnumName1 -> ENUM_NAME1
|
|
# ENUM_NAME -> ENUM_NAME, ENUM_NAME1 -> ENUM_NAME1, ENUM_Name2 -> ENUM_NAME2
|
|
# ENUM24_Name -> ENUM24_NAME
|
|
def camel_to_upper(value):
|
|
c_fun_str = c_name(value, False)
|
|
if value.isupper():
|
|
return c_fun_str
|
|
|
|
new_name = ''
|
|
l = len(c_fun_str)
|
|
for i in range(l):
|
|
c = c_fun_str[i]
|
|
# When c is upper and no "_" appears before, do more checks
|
|
if c.isupper() and (i > 0) and c_fun_str[i - 1] != "_":
|
|
# Case 1: next string is lower
|
|
# Case 2: previous string is digit
|
|
if (i < (l - 1) and c_fun_str[i + 1].islower()) or \
|
|
c_fun_str[i - 1].isdigit():
|
|
new_name += '_'
|
|
new_name += c
|
|
return new_name.lstrip('_').upper()
|
|
|
|
def c_enum_const(type_name, const_name):
|
|
return camel_to_upper(type_name + '_' + const_name)
|
|
|
|
c_name_trans = string.maketrans('.-', '__')
|
|
|
|
# Map @name to a valid C identifier.
|
|
# If @protect, avoid returning certain ticklish identifiers (like
|
|
# C keywords) by prepending "q_".
|
|
#
|
|
# Used for converting 'name' from a 'name':'type' qapi definition
|
|
# into a generated struct member, as well as converting type names
|
|
# into substrings of a generated C function name.
|
|
# '__a.b_c' -> '__a_b_c', 'x-foo' -> 'x_foo'
|
|
# protect=True: 'int' -> 'q_int'; protect=False: 'int' -> 'int'
|
|
def c_name(name, protect=True):
|
|
# ANSI X3J11/88-090, 3.1.1
|
|
c89_words = set(['auto', 'break', 'case', 'char', 'const', 'continue',
|
|
'default', 'do', 'double', 'else', 'enum', 'extern', 'float',
|
|
'for', 'goto', 'if', 'int', 'long', 'register', 'return',
|
|
'short', 'signed', 'sizeof', 'static', 'struct', 'switch',
|
|
'typedef', 'union', 'unsigned', 'void', 'volatile', 'while'])
|
|
# ISO/IEC 9899:1999, 6.4.1
|
|
c99_words = set(['inline', 'restrict', '_Bool', '_Complex', '_Imaginary'])
|
|
# ISO/IEC 9899:2011, 6.4.1
|
|
c11_words = set(['_Alignas', '_Alignof', '_Atomic', '_Generic', '_Noreturn',
|
|
'_Static_assert', '_Thread_local'])
|
|
# GCC http://gcc.gnu.org/onlinedocs/gcc-4.7.1/gcc/C-Extensions.html
|
|
# excluding _.*
|
|
gcc_words = set(['asm', 'typeof'])
|
|
# C++ ISO/IEC 14882:2003 2.11
|
|
cpp_words = set(['bool', 'catch', 'class', 'const_cast', 'delete',
|
|
'dynamic_cast', 'explicit', 'false', 'friend', 'mutable',
|
|
'namespace', 'new', 'operator', 'private', 'protected',
|
|
'public', 'reinterpret_cast', 'static_cast', 'template',
|
|
'this', 'throw', 'true', 'try', 'typeid', 'typename',
|
|
'using', 'virtual', 'wchar_t',
|
|
# alternative representations
|
|
'and', 'and_eq', 'bitand', 'bitor', 'compl', 'not',
|
|
'not_eq', 'or', 'or_eq', 'xor', 'xor_eq'])
|
|
# namespace pollution:
|
|
polluted_words = set(['unix', 'errno'])
|
|
if protect and (name in c89_words | c99_words | c11_words | gcc_words | cpp_words | polluted_words):
|
|
return "q_" + name
|
|
return name.translate(c_name_trans)
|
|
|
|
# Map type @name to the C typedef name for the list form.
|
|
#
|
|
# ['Name'] -> 'NameList', ['x-Foo'] -> 'x_FooList', ['int'] -> 'intList'
|
|
def c_list_type(name):
|
|
return type_name(name) + 'List'
|
|
|
|
# Map type @value to the C typedef form.
|
|
#
|
|
# Used for converting 'type' from a 'member':'type' qapi definition
|
|
# into the alphanumeric portion of the type for a generated C parameter,
|
|
# as well as generated C function names. See c_type() for the rest of
|
|
# the conversion such as adding '*' on pointer types.
|
|
# 'int' -> 'int', '[x-Foo]' -> 'x_FooList', '__a.b_c' -> '__a_b_c'
|
|
def type_name(value):
|
|
if type(value) == list:
|
|
return c_list_type(value[0])
|
|
if value in builtin_types.keys():
|
|
return value
|
|
return c_name(value)
|
|
|
|
eatspace = '\033EATSPACE.'
|
|
pointer_suffix = ' *' + eatspace
|
|
|
|
# Map type @name to its C type expression.
|
|
# If @is_param, const-qualify the string type.
|
|
#
|
|
# This function is used for computing the full C type of 'member':'name'.
|
|
# A special suffix is added in c_type() for pointer types, and it's
|
|
# stripped in mcgen(). So please notice this when you check the return
|
|
# value of c_type() outside mcgen().
|
|
def c_type(value, is_param=False):
|
|
if value == 'str':
|
|
if is_param:
|
|
return 'const char' + pointer_suffix
|
|
return 'char' + pointer_suffix
|
|
|
|
elif value == 'int':
|
|
return 'int64_t'
|
|
elif (value == 'int8' or value == 'int16' or value == 'int32' or
|
|
value == 'int64' or value == 'uint8' or value == 'uint16' or
|
|
value == 'uint32' or value == 'uint64'):
|
|
return value + '_t'
|
|
elif value == 'size':
|
|
return 'uint64_t'
|
|
elif value == 'bool':
|
|
return 'bool'
|
|
elif value == 'number':
|
|
return 'double'
|
|
elif type(value) == list:
|
|
return c_list_type(value[0]) + pointer_suffix
|
|
elif is_enum(value):
|
|
return c_name(value)
|
|
elif value == None:
|
|
return 'void'
|
|
elif value in events:
|
|
return camel_case(value) + 'Event' + pointer_suffix
|
|
else:
|
|
# complex type name
|
|
assert isinstance(value, str) and value != ""
|
|
return c_name(value) + pointer_suffix
|
|
|
|
def is_c_ptr(value):
|
|
return c_type(value).endswith(pointer_suffix)
|
|
|
|
def genindent(count):
|
|
ret = ""
|
|
for i in range(count):
|
|
ret += " "
|
|
return ret
|
|
|
|
indent_level = 0
|
|
|
|
def push_indent(indent_amount=4):
|
|
global indent_level
|
|
indent_level += indent_amount
|
|
|
|
def pop_indent(indent_amount=4):
|
|
global indent_level
|
|
indent_level -= indent_amount
|
|
|
|
# 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)
|
|
raw = re.subn("^.", indent + r'\g<0>', raw, 0, re.MULTILINE)
|
|
raw = raw[0]
|
|
return re.sub(re.escape(eatspace) + ' *', '', raw)
|
|
|
|
def mcgen(code, **kwds):
|
|
if code[0] == '\n':
|
|
code = code[1:]
|
|
return cgen(code, **kwds)
|
|
|
|
|
|
def guardname(filename):
|
|
return c_name(filename, protect=False).upper()
|
|
|
|
def guardstart(name):
|
|
return mcgen('''
|
|
|
|
#ifndef %(name)s
|
|
#define %(name)s
|
|
|
|
''',
|
|
name=guardname(name))
|
|
|
|
def guardend(name):
|
|
return mcgen('''
|
|
|
|
#endif /* %(name)s */
|
|
|
|
''',
|
|
name=guardname(name))
|
|
|
|
#
|
|
# Common command line parsing
|
|
#
|
|
|
|
def parse_command_line(extra_options = "", extra_long_options = []):
|
|
|
|
try:
|
|
opts, args = getopt.gnu_getopt(sys.argv[1:],
|
|
"chp:o:" + extra_options,
|
|
["source", "header", "prefix=",
|
|
"output-dir="] + extra_long_options)
|
|
except getopt.GetoptError, err:
|
|
print >>sys.stderr, "%s: %s" % (sys.argv[0], str(err))
|
|
sys.exit(1)
|
|
|
|
output_dir = ""
|
|
prefix = ""
|
|
do_c = False
|
|
do_h = False
|
|
extra_opts = []
|
|
|
|
for oa in opts:
|
|
o, a = oa
|
|
if o in ("-p", "--prefix"):
|
|
match = re.match('([A-Za-z_.-][A-Za-z0-9_.-]*)?', a)
|
|
if match.end() != len(a):
|
|
print >>sys.stderr, \
|
|
"%s: 'funny character '%s' in argument of --prefix" \
|
|
% (sys.argv[0], a[match.end()])
|
|
sys.exit(1)
|
|
prefix = a
|
|
elif o in ("-o", "--output-dir"):
|
|
output_dir = a + "/"
|
|
elif o in ("-c", "--source"):
|
|
do_c = True
|
|
elif o in ("-h", "--header"):
|
|
do_h = True
|
|
else:
|
|
extra_opts.append(oa)
|
|
|
|
if not do_c and not do_h:
|
|
do_c = True
|
|
do_h = True
|
|
|
|
if len(args) != 1:
|
|
print >>sys.stderr, "%s: need exactly one argument" % sys.argv[0]
|
|
sys.exit(1)
|
|
fname = args[0]
|
|
|
|
return (fname, output_dir, do_c, do_h, prefix, extra_opts)
|
|
|
|
#
|
|
# Generate output files with boilerplate
|
|
#
|
|
|
|
def open_output(output_dir, do_c, do_h, prefix, c_file, h_file,
|
|
c_comment, h_comment):
|
|
guard = guardname(prefix + h_file)
|
|
c_file = output_dir + prefix + c_file
|
|
h_file = output_dir + prefix + h_file
|
|
|
|
try:
|
|
os.makedirs(output_dir)
|
|
except os.error, e:
|
|
if e.errno != errno.EEXIST:
|
|
raise
|
|
|
|
def maybe_open(really, name, opt):
|
|
if really:
|
|
return open(name, opt)
|
|
else:
|
|
import StringIO
|
|
return StringIO.StringIO()
|
|
|
|
fdef = maybe_open(do_c, c_file, 'w')
|
|
fdecl = maybe_open(do_h, h_file, 'w')
|
|
|
|
fdef.write(mcgen('''
|
|
/* AUTOMATICALLY GENERATED, DO NOT MODIFY */
|
|
%(comment)s
|
|
''',
|
|
comment = c_comment))
|
|
|
|
fdecl.write(mcgen('''
|
|
/* AUTOMATICALLY GENERATED, DO NOT MODIFY */
|
|
%(comment)s
|
|
#ifndef %(guard)s
|
|
#define %(guard)s
|
|
|
|
''',
|
|
comment = h_comment, guard = guard))
|
|
|
|
return (fdef, fdecl)
|
|
|
|
def close_output(fdef, fdecl):
|
|
fdecl.write('''
|
|
#endif
|
|
''')
|
|
fdecl.close()
|
|
fdef.close()
|