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#!/usr/bin/env python
# Copyright (c) 2012 The Chromium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
""" Parser for PPAPI IDL """
#
# IDL Parser
#
# The parser is uses the PLY yacc library to build a set of parsing rules based
# on WebIDL.
#
# WebIDL, and WebIDL regular expressions can be found at:
# http://dev.w3.org/2006/webapi/WebIDL/
# PLY can be found at:
# http://www.dabeaz.com/ply/
#
# The parser generates a tree by recursively matching sets of items against
# defined patterns. When a match is made, that set of items is reduced
# to a new item. The new item can provide a match for parent patterns.
# In this way an AST is built (reduced) depth first.
import getopt
import glob
import os.path
import re
import sys
import time
from idl_ast import IDLAst
from idl_log import ErrOut, InfoOut, WarnOut
from idl_lexer import IDLLexer
from idl_node import IDLAttribute, IDLFile, IDLNode
from idl_option import GetOption, Option, ParseOptions
from idl_lint import Lint
from ply import lex
from ply import yacc
Option('build_debug', 'Debug tree building.')
Option('parse_debug', 'Debug parse reduction steps.')
Option('token_debug', 'Debug token generation.')
Option('dump_tree', 'Dump the tree.')
Option('srcroot', 'Working directory.', default=os.path.join('..', 'api'))
Option('include_private', 'Include private IDL directory in default API paths.')
#
# ERROR_REMAP
#
# Maps the standard error formula into a more friendly error message.
#
ERROR_REMAP = {
'Unexpected ")" after "(".' : 'Empty argument list.',
'Unexpected ")" after ",".' : 'Missing argument.',
'Unexpected "}" after ",".' : 'Trailing comma in block.',
'Unexpected "}" after "{".' : 'Unexpected empty block.',
'Unexpected comment after "}".' : 'Unexpected trailing comment.',
'Unexpected "{" after keyword "enum".' : 'Enum missing name.',
'Unexpected "{" after keyword "struct".' : 'Struct missing name.',
'Unexpected "{" after keyword "interface".' : 'Interface missing name.',
}
# DumpReduction
#
# Prints out the set of items which matched a particular pattern and the
# new item or set it was reduced to.
def DumpReduction(cls, p):
if p[0] is None:
InfoOut.Log("OBJ: %s(%d) - None\n" % (cls, len(p)))
InfoOut.Log(" [%s]\n" % [str(x) for x in p[1:]])
else:
out = ""
for index in range(len(p) - 1):
out += " >%s< " % str(p[index + 1])
InfoOut.Log("OBJ: %s(%d) - %s : %s\n" % (cls, len(p), str(p[0]), out))
# CopyToList
#
# Takes an input item, list, or None, and returns a new list of that set.
def CopyToList(item):
# If the item is 'Empty' make it an empty list
if not item: item = []
# If the item is not a list
if type(item) is not type([]): item = [item]
# Make a copy we can modify
return list(item)
# ListFromConcat
#
# Generate a new List by joining of two sets of inputs which can be an
# individual item, a list of items, or None.
def ListFromConcat(*items):
itemsout = []
for item in items:
itemlist = CopyToList(item)
itemsout.extend(itemlist)
return itemsout
# TokenTypeName
#
# Generate a string which has the type and value of the token.
def TokenTypeName(t):
if t.type == 'SYMBOL': return 'symbol %s' % t.value
if t.type in ['HEX', 'INT', 'OCT', 'FLOAT']:
return 'value %s' % t.value
if t.type == 'STRING' : return 'string "%s"' % t.value
if t.type == 'COMMENT' : return 'comment'
if t.type == t.value: return '"%s"' % t.value
return 'keyword "%s"' % t.value
#
# IDL Parser
#
# The Parser inherits the from the Lexer to provide PLY with the tokenizing
# definitions. Parsing patterns are encoded as function where p_<name> is
# is called any time a patern matching the function documentation is found.
# Paterns are expressed in the form of:
# """ <new item> : <item> ....
# | <item> ...."""
#
# Where new item is the result of a match against one or more sets of items
# separated by the "|".
#
# The function is called with an object 'p' where p[0] is the output object
# and p[n] is the set of inputs for positive values of 'n'. Len(p) can be
# used to distinguish between multiple item sets in the pattern.
#
# For more details on parsing refer to the PLY documentation at
# http://www.dabeaz.com/ply/
#
#
# The parser uses the following conventions:
# a <type>_block defines a block of <type> definitions in the form of:
# [comment] [ext_attr_block] <type> <name> '{' <type>_list '}' ';'
# A block is reduced by returning an object of <type> with a name of <name>
# which in turn has <type>_list as children.
#
# A [comment] is a optional C style comment block enclosed in /* ... */ which
# is appended to the adjacent node as a child.
#
# A [ext_attr_block] is an optional list of Extended Attributes which is
# appended to the adjacent node as a child.
#
# a <type>_list defines a list of <type> items which will be passed as a
# list of children to the parent pattern. A list is in the form of:
# [comment] [ext_attr_block] <...DEF...> ';' <type>_list | (empty)
# or
# [comment] [ext_attr_block] <...DEF...> <type>_cont
#
# In the first form, the list is reduced recursively, where the right side
# <type>_list is first reduced then joined with pattern currently being
# matched. The list is terminated with the (empty) pattern is matched.
#
# In the second form the list is reduced recursively, where the right side
# <type>_cont is first reduced then joined with the pattern currently being
# matched. The type_<cont> is in the form of:
# ',' <type>_list | (empty)
# The <type>_cont form is used to consume the ',' which only occurs when
# there is more than one object in the list. The <type>_cont also provides
# the terminating (empty) definition.
#
class IDLParser(IDLLexer):
# TOP
#
# This pattern defines the top of the parse tree. The parse tree is in the
# the form of:
#
# top
# *modifiers
# *comments
# *ext_attr_block
# ext_attr_list
# attr_arg_list
# *integer, value
# *param_list
# *typeref
#
# top_list
# describe_block
# describe_list
# enum_block
# enum_item
# interface_block
# member
# label_block
# label_item
# struct_block
# member
# typedef_decl
# typedef_data
# typedef_func
#
# (* sub matches found at multiple levels and are not truly children of top)
#
# We force all input files to start with two comments. The first comment is a
# Copyright notice followed by a set of file wide Extended Attributes, followed
# by the file comment and finally by file level patterns.
#
# Find the Copyright, File comment, and optional file wide attributes. We
# use a match with COMMENT instead of comments to force the token to be
# present. The extended attributes and the top_list become siblings which
# in turn are children of the file object created from the results of top.
def p_top(self, p):
"""top : COMMENT COMMENT ext_attr_block top_list"""
Copyright = self.BuildComment('Copyright', p, 1)
Filedoc = self.BuildComment('Comment', p, 2)
p[0] = ListFromConcat(Copyright, Filedoc, p[3], p[4])
if self.parse_debug: DumpReduction('top', p)
# Build a list of top level items.
def p_top_list(self, p):
"""top_list : callback_decl top_list
| describe_block top_list
| dictionary_block top_list
| enum_block top_list
| inline top_list
| interface_block top_list
| label_block top_list
| namespace top_list
| struct_block top_list
| typedef_decl top_list
| """
if len(p) > 2:
p[0] = ListFromConcat(p[1], p[2])
if self.parse_debug: DumpReduction('top_list', p)
# Recover from error and continue parsing at the next top match.
def p_top_error(self, p):
"""top_list : error top_list"""
p[0] = p[2]
#
# Modifier List
#
#
def p_modifiers(self, p):
"""modifiers : comments ext_attr_block"""
p[0] = ListFromConcat(p[1], p[2])
if self.parse_debug: DumpReduction('modifiers', p)
#
# Comments
#
# Comments are optional list of C style comment objects. Comments are returned
# as a list or None.
#
def p_comments(self, p):
"""comments : COMMENT comments
| """
if len(p) > 1:
child = self.BuildComment('Comment', p, 1)
p[0] = ListFromConcat(child, p[2])
if self.parse_debug: DumpReduction('comments', p)
else:
if self.parse_debug: DumpReduction('no comments', p)
#
# Namespace
#
# A namespace provides a named scope to an enclosed top_list.
#
def p_namespace(self, p):
"""namespace : modifiers NAMESPACE namespace_name '{' top_list '}' ';'"""
children = ListFromConcat(p[1], p[5])
p[0] = self.BuildNamed('Namespace', p, 3, children)
# We allow namespace names of the form foo.bar.baz.
def p_namespace_name(self, p):
"""namespace_name : SYMBOL
| SYMBOL '.' namespace_name"""
p[0] = "".join(p[1:])
#
# Dictionary
#
# A dictionary contains is a named list of optional and required members.
#
def p_dictionary_block(self, p):
"""dictionary_block : modifiers DICTIONARY SYMBOL '{' struct_list '}' ';'"""
p[0] = self.BuildNamed('Dictionary', p, 3, ListFromConcat(p[5]))
#
# Callback
#
# A callback is essentially a single function declaration (outside of an
# Interface).
#
def p_callback_decl(self, p):
"""callback_decl : modifiers CALLBACK SYMBOL '=' SYMBOL param_list ';'"""
children = ListFromConcat(p[1], p[6])
p[0] = self.BuildNamed('Callback', p, 3, children)
#
# Inline
#
# Inline blocks define option code to be emitted based on language tag,
# in the form of:
# #inline <LANGUAGE>
# <CODE>
# #endinl
#
def p_inline(self, p):
"""inline : modifiers INLINE"""
words = p[2].split()
name = self.BuildAttribute('NAME', words[1])
lines = p[2].split('\n')
value = self.BuildAttribute('VALUE', '\n'.join(lines[1:-1]) + '\n')
children = ListFromConcat(name, value, p[1])
p[0] = self.BuildProduction('Inline', p, 2, children)
if self.parse_debug: DumpReduction('inline', p)
# Extended Attributes
#
# Extended Attributes denote properties which will be applied to a node in the
# AST. A list of extended attributes are denoted by a brackets '[' ... ']'
# enclosing a comma separated list of extended attributes in the form of:
#
# Name
# Name=HEX | INT | OCT | FLOAT
# Name="STRING"
# Name=Function(arg ...)
# TODO(noelallen) -Not currently supported:
# ** Name(arg ...) ...
# ** Name=Scope::Value
#
# Extended Attributes are returned as a list or None.
def p_ext_attr_block(self, p):
"""ext_attr_block : '[' ext_attr_list ']'
| """
if len(p) > 1:
p[0] = p[2]
if self.parse_debug: DumpReduction('ext_attr_block', p)
else:
if self.parse_debug: DumpReduction('no ext_attr_block', p)
def p_ext_attr_list(self, p):
"""ext_attr_list : SYMBOL '=' SYMBOL ext_attr_cont
| SYMBOL '=' value ext_attr_cont
| SYMBOL '=' SYMBOL param_list ext_attr_cont
| SYMBOL ext_attr_cont"""
# If there are 4 tokens plus a return slot, this must be in the form
# SYMBOL = SYMBOL|value ext_attr_cont
if len(p) == 5:
p[0] = ListFromConcat(self.BuildAttribute(p[1], p[3]), p[4])
# If there are 5 tokens plus a return slot, this must be in the form
# SYMBOL = SYMBOL (param_list) ext_attr_cont
elif len(p) == 6:
member = self.BuildNamed('Member', p, 3, [p[4]])
p[0] = ListFromConcat(self.BuildAttribute(p[1], member), p[5])
# Otherwise, this must be: SYMBOL ext_attr_cont
else:
p[0] = ListFromConcat(self.BuildAttribute(p[1], 'True'), p[2])
if self.parse_debug: DumpReduction('ext_attribute_list', p)
def p_ext_attr_cont(self, p):
"""ext_attr_cont : ',' ext_attr_list
|"""
if len(p) > 1: p[0] = p[2]
if self.parse_debug: DumpReduction('ext_attribute_cont', p)
def p_ext_attr_func(self, p):
"""ext_attr_list : SYMBOL '(' attr_arg_list ')' ext_attr_cont"""
p[0] = ListFromConcat(self.BuildAttribute(p[1] + '()', p[3]), p[5])
if self.parse_debug: DumpReduction('attr_arg_func', p)
def p_ext_attr_arg_list(self, p):
"""attr_arg_list : SYMBOL attr_arg_cont
| value attr_arg_cont"""
p[0] = ListFromConcat(p[1], p[2])
def p_attr_arg_cont(self, p):
"""attr_arg_cont : ',' attr_arg_list
| """
if self.parse_debug: DumpReduction('attr_arg_cont', p)
if len(p) > 1: p[0] = p[2]
def p_attr_arg_error(self, p):
"""attr_arg_cont : error attr_arg_cont"""
p[0] = p[2]
if self.parse_debug: DumpReduction('attr_arg_error', p)
#
# Describe
#
# A describe block is defined at the top level. It provides a mechanism for
# attributing a group of ext_attr to a describe_list. Members of the
# describe list are language specific 'Type' declarations
#
def p_describe_block(self, p):
"""describe_block : modifiers DESCRIBE '{' describe_list '}' ';'"""
children = ListFromConcat(p[1], p[4])
p[0] = self.BuildProduction('Describe', p, 2, children)
if self.parse_debug: DumpReduction('describe_block', p)
def p_describe_list(self, p):
"""describe_list : modifiers SYMBOL ';' describe_list
| modifiers ENUM ';' describe_list
| modifiers STRUCT ';' describe_list
| modifiers TYPEDEF ';' describe_list
| """
if len(p) > 1:
Type = self.BuildNamed('Type', p, 2, p[1])
p[0] = ListFromConcat(Type, p[4])
def p_describe_error(self, p):
"""describe_list : error describe_list"""
p[0] = p[2]
#
# Constant Values (integer, value)
#
# Constant values can be found at various levels. A Constant value is returns
# as the string value after validated against a FLOAT, HEX, INT, OCT or
# STRING pattern as appropriate.
#
def p_value(self, p):
"""value : FLOAT
| HEX
| INT
| OCT
| STRING"""
p[0] = p[1]
if self.parse_debug: DumpReduction('value', p)
def p_value_lshift(self, p):
"""value : integer LSHIFT INT"""
p[0] = "%s << %s" % (p[1], p[3])
if self.parse_debug: DumpReduction('value', p)
# Integers are numbers which may not be floats used in cases like array sizes.
def p_integer(self, p):
"""integer : HEX
| INT
| OCT"""
p[0] = p[1]
if self.parse_debug: DumpReduction('integer', p)
#
# Expression
#
# A simple arithmetic expression.
#
precedence = (
('left','|','&','^'),
('left','LSHIFT','RSHIFT'),
('left','+','-'),
('left','*','/'),
('right','UMINUS','~'),
)
def p_expression_binop(self, p):
"""expression : expression LSHIFT expression
| expression RSHIFT expression
| expression '|' expression
| expression '&' expression
| expression '^' expression
| expression '+' expression
| expression '-' expression
| expression '*' expression
| expression '/' expression"""
p[0] = "%s %s %s" % (str(p[1]), str(p[2]), str(p[3]))
if self.parse_debug: DumpReduction('expression_binop', p)
def p_expression_unop(self, p):
"""expression : '-' expression %prec UMINUS
| '~' expression %prec '~'"""
p[0] = "%s%s" % (str(p[1]), str(p[2]))
if self.parse_debug: DumpReduction('expression_unop', p)
def p_expression_term(self, p):
"expression : '(' expression ')'"
p[0] = "%s%s%s" % (str(p[1]), str(p[2]), str(p[3]))
if self.parse_debug: DumpReduction('expression_term', p)
def p_expression_symbol(self, p):
"expression : SYMBOL"
p[0] = p[1]
if self.parse_debug: DumpReduction('expression_symbol', p)
def p_expression_integer(self, p):
"expression : integer"
p[0] = p[1]
if self.parse_debug: DumpReduction('expression_integer', p)
#
# Array List
#
# Defined a list of array sizes (if any).
#
def p_arrays(self, p):
"""arrays : '[' ']' arrays
| '[' integer ']' arrays
| """
# If there are 3 tokens plus a return slot it is an unsized array
if len(p) == 4:
array = self.BuildProduction('Array', p, 1)
p[0] = ListFromConcat(array, p[3])
# If there are 4 tokens plus a return slot it is a fixed array
elif len(p) == 5:
count = self.BuildAttribute('FIXED', p[2])
array = self.BuildProduction('Array', p, 2, [count])
p[0] = ListFromConcat(array, p[4])
# If there is only a return slot, do not fill it for this terminator.
elif len(p) == 1: return
if self.parse_debug: DumpReduction('arrays', p)
# An identifier is a legal value for a parameter or attribute name. Lots of
# existing IDL files use "callback" as a parameter/attribute name, so we allow
# a SYMBOL or the CALLBACK keyword.
def p_identifier(self, p):
"""identifier : SYMBOL
| CALLBACK"""
p[0] = p[1]
# Save the line number of the underlying token (otherwise it gets
# discarded), since we use it in the productions with an identifier in
# them.
p.set_lineno(0, p.lineno(1))
#
# Parameter List
#
# A parameter list is a collection of arguments which are passed to a
# function.
#
def p_param_list(self, p):
"""param_list : '(' param_item param_cont ')'
| '(' ')' """
if len(p) > 3:
args = ListFromConcat(p[2], p[3])
else:
args = []
p[0] = self.BuildProduction('Callspec', p, 1, args)
if self.parse_debug: DumpReduction('param_list', p)
def p_param_item(self, p):
"""param_item : modifiers optional SYMBOL arrays identifier"""
typeref = self.BuildAttribute('TYPEREF', p[3])
children = ListFromConcat(p[1],p[2], typeref, p[4])
p[0] = self.BuildNamed('Param', p, 5, children)
if self.parse_debug: DumpReduction('param_item', p)
def p_optional(self, p):
"""optional : OPTIONAL
| """
if len(p) == 2:
p[0] = self.BuildAttribute('OPTIONAL', True)
def p_param_cont(self, p):
"""param_cont : ',' param_item param_cont
| """
if len(p) > 1:
p[0] = ListFromConcat(p[2], p[3])
if self.parse_debug: DumpReduction('param_cont', p)
def p_param_error(self, p):
"""param_cont : error param_cont"""
p[0] = p[2]
#
# Typedef
#
# A typedef creates a new referencable type. The typedef can specify an array
# definition as well as a function declaration.
#
def p_typedef_data(self, p):
"""typedef_decl : modifiers TYPEDEF SYMBOL SYMBOL ';' """
typeref = self.BuildAttribute('TYPEREF', p[3])
children = ListFromConcat(p[1], typeref)
p[0] = self.BuildNamed('Typedef', p, 4, children)
if self.parse_debug: DumpReduction('typedef_data', p)
def p_typedef_array(self, p):
"""typedef_decl : modifiers TYPEDEF SYMBOL arrays SYMBOL ';' """
typeref = self.BuildAttribute('TYPEREF', p[3])
children = ListFromConcat(p[1], typeref, p[4])
p[0] = self.BuildNamed('Typedef', p, 5, children)
if self.parse_debug: DumpReduction('typedef_array', p)
def p_typedef_func(self, p):
"""typedef_decl : modifiers TYPEDEF SYMBOL SYMBOL param_list ';' """
typeref = self.BuildAttribute('TYPEREF', p[3])
children = ListFromConcat(p[1], typeref, p[5])
p[0] = self.BuildNamed('Typedef', p, 4, children)
if self.parse_debug: DumpReduction('typedef_func', p)
#
# Enumeration
#
# An enumeration is a set of named integer constants. An enumeration
# is valid type which can be referenced in other definitions.
#
def p_enum_block(self, p):
"""enum_block : modifiers ENUM SYMBOL '{' enum_list '}' ';'"""
p[0] = self.BuildNamed('Enum', p, 3, ListFromConcat(p[1], p[5]))
if self.parse_debug: DumpReduction('enum_block', p)
def p_enum_list(self, p):
"""enum_list : modifiers SYMBOL '=' expression enum_cont
| modifiers SYMBOL enum_cont"""
if len(p) > 4:
val = self.BuildAttribute('VALUE', p[4])
enum = self.BuildNamed('EnumItem', p, 2, ListFromConcat(val, p[1]))
p[0] = ListFromConcat(enum, p[5])
else:
enum = self.BuildNamed('EnumItem', p, 2, p[1])
p[0] = ListFromConcat(enum, p[3])
if self.parse_debug: DumpReduction('enum_list', p)
def p_enum_cont(self, p):
"""enum_cont : ',' enum_list
|"""
if len(p) > 1: p[0] = p[2]
if self.parse_debug: DumpReduction('enum_cont', p)
def p_enum_cont_error(self, p):
"""enum_cont : error enum_cont"""
p[0] = p[2]
if self.parse_debug: DumpReduction('enum_error', p)
#
# Label
#
# A label is a special kind of enumeration which allows us to go from a
# set of labels
#
def p_label_block(self, p):
"""label_block : modifiers LABEL SYMBOL '{' label_list '}' ';'"""
p[0] = self.BuildNamed('Label', p, 3, ListFromConcat(p[1], p[5]))
if self.parse_debug: DumpReduction('label_block', p)
def p_label_list(self, p):
"""label_list : modifiers SYMBOL '=' FLOAT label_cont"""
val = self.BuildAttribute('VALUE', p[4])
label = self.BuildNamed('LabelItem', p, 2, ListFromConcat(val, p[1]))
p[0] = ListFromConcat(label, p[5])
if self.parse_debug: DumpReduction('label_list', p)
def p_label_cont(self, p):
"""label_cont : ',' label_list
|"""
if len(p) > 1: p[0] = p[2]
if self.parse_debug: DumpReduction('label_cont', p)
def p_label_cont_error(self, p):
"""label_cont : error label_cont"""
p[0] = p[2]
if self.parse_debug: DumpReduction('label_error', p)
#
# Members
#
# A member attribute or function of a struct or interface.
#
def p_member_attribute(self, p):
"""member_attribute : modifiers SYMBOL arrays questionmark identifier"""
typeref = self.BuildAttribute('TYPEREF', p[2])
children = ListFromConcat(p[1], typeref, p[3], p[4])
p[0] = self.BuildNamed('Member', p, 5, children)
if self.parse_debug: DumpReduction('attribute', p)
def p_member_function(self, p):
"""member_function : modifiers static SYMBOL SYMBOL param_list"""
typeref = self.BuildAttribute('TYPEREF', p[3])
children = ListFromConcat(p[1], p[2], typeref, p[5])
p[0] = self.BuildNamed('Member', p, 4, children)
if self.parse_debug: DumpReduction('function', p)
def p_static(self, p):
"""static : STATIC
| """
if len(p) == 2:
p[0] = self.BuildAttribute('STATIC', True)
def p_questionmark(self, p):
"""questionmark : '?'
| """
if len(p) == 2:
p[0] = self.BuildAttribute('OPTIONAL', True)
#
# Interface
#
# An interface is a named collection of functions.
#
def p_interface_block(self, p):
"""interface_block : modifiers INTERFACE SYMBOL '{' interface_list '}' ';'"""
p[0] = self.BuildNamed('Interface', p, 3, ListFromConcat(p[1], p[5]))
if self.parse_debug: DumpReduction('interface_block', p)
def p_interface_list(self, p):
"""interface_list : member_function ';' interface_list
| """
if len(p) > 1 :
p[0] = ListFromConcat(p[1], p[3])
if self.parse_debug: DumpReduction('interface_list', p)
def p_interface_error(self, p):
"""interface_list : error interface_list"""
p[0] = p[2]
#
# Struct
#
# A struct is a named collection of members which in turn reference other
# types. The struct is a referencable type.
#
def p_struct_block(self, p):
"""struct_block : modifiers STRUCT SYMBOL '{' struct_list '}' ';'"""
children = ListFromConcat(p[1], p[5])
p[0] = self.BuildNamed('Struct', p, 3, children)
if self.parse_debug: DumpReduction('struct_block', p)
def p_struct_list(self, p):
"""struct_list : member_attribute ';' struct_list
| member_function ';' struct_list
|"""
if len(p) > 1: p[0] = ListFromConcat(p[1], p[3])
def p_struct_error(self, p):
"""struct_list : error struct_list"""
p[0] = p[2]
#
# Parser Errors
#
# p_error is called whenever the parser can not find a pattern match for
# a set of items from the current state. The p_error function defined here
# is triggered logging an error, and parsing recover happens as the
# p_<type>_error functions defined above are called. This allows the parser
# to continue so as to capture more than one error per file.
#
def p_error(self, t):
filename = self.lexobj.filename
self.parse_errors += 1
if t:
lineno = t.lineno
pos = t.lexpos
prev = self.yaccobj.symstack[-1]
if type(prev) == lex.LexToken:
msg = "Unexpected %s after %s." % (
TokenTypeName(t), TokenTypeName(prev))
else:
msg = "Unexpected %s." % (t.value)
else:
lineno = self.last.lineno
pos = self.last.lexpos
msg = "Unexpected end of file after %s." % TokenTypeName(self.last)
self.yaccobj.restart()
# Attempt to remap the error to a friendlier form
if msg in ERROR_REMAP:
msg = ERROR_REMAP[msg]
# Log the error
ErrOut.LogLine(filename, lineno, pos, msg)
def Warn(self, node, msg):
WarnOut.LogLine(node.filename, node.lineno, node.pos, msg)
self.parse_warnings += 1
def __init__(self):
IDLLexer.__init__(self)
self.yaccobj = yacc.yacc(module=self, tabmodule=None, debug=False,
optimize=0, write_tables=0)
self.build_debug = GetOption('build_debug')
self.parse_debug = GetOption('parse_debug')
self.token_debug = GetOption('token_debug')
self.verbose = GetOption('verbose')
self.parse_errors = 0
#
# Tokenizer
#
# The token function returns the next token provided by IDLLexer for matching
# against the leaf paterns.
#
def token(self):
tok = self.lexobj.token()
if tok:
self.last = tok
if self.token_debug:
InfoOut.Log("TOKEN %s(%s)" % (tok.type, tok.value))
return tok
#
# BuildProduction
#
# Production is the set of items sent to a grammar rule resulting in a new
# item being returned.
#
# p - Is the Yacc production object containing the stack of items
# index - Index into the production of the name for the item being produced.
# cls - The type of item being producted
# childlist - The children of the new item
def BuildProduction(self, cls, p, index, childlist=None):
if not childlist: childlist = []
filename = self.lexobj.filename
lineno = p.lineno(index)
pos = p.lexpos(index)
out = IDLNode(cls, filename, lineno, pos, childlist)
if self.build_debug:
InfoOut.Log("Building %s" % out)
return out
def BuildNamed(self, cls, p, index, childlist=None):
if not childlist: childlist = []
childlist.append(self.BuildAttribute('NAME', p[index]))
return self.BuildProduction(cls, p, index, childlist)
def BuildComment(self, cls, p, index):
name = p[index]
# Remove comment markers
lines = []
if name[:2] == '//':
# For C++ style, remove any leading whitespace and the '//' marker from
# each line.
form = 'cc'
for line in name.split('\n'):
start = line.find('//')
lines.append(line[start+2:])
else:
# For C style, remove ending '*/''
form = 'c'
for line in name[:-2].split('\n'):
# Remove characters until start marker for this line '*' if found
# otherwise it should be blank.
offs = line.find('*')
if offs >= 0:
line = line[offs + 1:].rstrip()
else:
line = ''
lines.append(line)
name = '\n'.join(lines)
childlist = [self.BuildAttribute('NAME', name),
self.BuildAttribute('FORM', form)]
return self.BuildProduction(cls, p, index, childlist)
#
# BuildAttribute
#
# An ExtendedAttribute is a special production that results in a property
# which is applied to the adjacent item. Attributes have no children and
# instead represent key/value pairs.
#
def BuildAttribute(self, key, val):
return IDLAttribute(key, val)
#
# ParseData
#
# Attempts to parse the current data loaded in the lexer.
#
def ParseData(self, data, filename='<Internal>'):
self.SetData(filename, data)
try:
self.parse_errors = 0
self.parse_warnings = 0
return self.yaccobj.parse(lexer=self)
except lex.LexError as le:
ErrOut.Log(str(le))
return []
#
# ParseFile
#
# Loads a new file into the lexer and attemps to parse it.
#
def ParseFile(self, filename):
date = time.ctime(os.path.getmtime(filename))
data = open(filename).read()
if self.verbose:
InfoOut.Log("Parsing %s" % filename)
try:
out = self.ParseData(data, filename)
# If we have a src root specified, remove it from the path
srcroot = GetOption('srcroot')
if srcroot and filename.find(srcroot) == 0:
filename = filename[len(srcroot) + 1:]
filenode = IDLFile(filename, out, self.parse_errors + self.lex_errors)
filenode.SetProperty('DATETIME', date)
return filenode
except Exception as e:
ErrOut.LogLine(filename, self.last.lineno, self.last.lexpos,
'Internal parsing error - %s.' % str(e))
raise
#
# Flatten Tree
#
# Flattens the tree of IDLNodes for use in testing.
#
def FlattenTree(node):
add_self = False
out = []
for child in node.children:
if child.IsA('Comment'):
add_self = True
else:
out.extend(FlattenTree(child))
if add_self:
out = [str(node)] + out
return out
def TestErrors(filename, filenode):
nodelist = filenode.GetChildren()
lexer = IDLLexer()
data = open(filename).read()
lexer.SetData(filename, data)
pass_comments = []
fail_comments = []
while True:
tok = lexer.lexobj.token()
if tok == None: break
if tok.type == 'COMMENT':
args = tok.value[3:-3].split()
if args[0] == 'OK':
pass_comments.append((tok.lineno, ' '.join(args[1:])))
else:
if args[0] == 'FAIL':
fail_comments.append((tok.lineno, ' '.join(args[1:])))
obj_list = []
for node in nodelist:
obj_list.extend(FlattenTree(node))
errors = 0
#
# Check for expected successes
#
obj_cnt = len(obj_list)
pass_cnt = len(pass_comments)
if obj_cnt != pass_cnt:
InfoOut.Log("Mismatched pass (%d) vs. nodes built (%d)."
% (pass_cnt, obj_cnt))
InfoOut.Log("PASS: %s" % [x[1] for x in pass_comments])
InfoOut.Log("OBJS: %s" % obj_list)
errors += 1
if pass_cnt > obj_cnt: pass_cnt = obj_cnt
for i in range(pass_cnt):
line, comment = pass_comments[i]
if obj_list[i] != comment:
ErrOut.LogLine(filename, line, None, "OBJ %s : EXPECTED %s\n" %
(obj_list[i], comment))
errors += 1
#
# Check for expected errors
#
err_list = ErrOut.DrainLog()
err_cnt = len(err_list)
fail_cnt = len(fail_comments)
if err_cnt != fail_cnt:
InfoOut.Log("Mismatched fail (%d) vs. errors seen (%d)."
% (fail_cnt, err_cnt))
InfoOut.Log("FAIL: %s" % [x[1] for x in fail_comments])
InfoOut.Log("ERRS: %s" % err_list)
errors += 1
if fail_cnt > err_cnt: fail_cnt = err_cnt
for i in range(fail_cnt):
line, comment = fail_comments[i]
err = err_list[i].strip()
if err_list[i] != comment:
ErrOut.Log("%s(%d) Error\n\tERROR : %s\n\tEXPECT: %s" % (
filename, line, err_list[i], comment))
errors += 1
# Clear the error list for the next run
err_list = []
return errors
def TestFile(parser, filename):
# Capture errors instead of reporting them so we can compare them
# with the expected errors.
ErrOut.SetConsole(False)
ErrOut.SetCapture(True)
filenode = parser.ParseFile(filename)
# Renable output
ErrOut.SetConsole(True)
ErrOut.SetCapture(False)
# Compare captured errors
return TestErrors(filename, filenode)
def TestErrorFiles(filter):
idldir = os.path.split(sys.argv[0])[0]
idldir = os.path.join(idldir, 'test_parser', '*.idl')
filenames = glob.glob(idldir)
parser = IDLParser()
total_errs = 0
for filename in filenames:
if filter and filename not in filter: continue
errs = TestFile(parser, filename)
if errs:
ErrOut.Log("%s test failed with %d error(s)." % (filename, errs))
total_errs += errs
if total_errs:
ErrOut.Log("Failed parsing test.")
else:
InfoOut.Log("Passed parsing test.")
return total_errs
def TestNamespaceFiles(filter):
idldir = os.path.split(sys.argv[0])[0]
idldir = os.path.join(idldir, 'test_namespace', '*.idl')
filenames = glob.glob(idldir)
testnames = []
for filename in filenames:
if filter and filename not in filter: continue
testnames.append(filename)
# If we have no files to test, then skip this test
if not testnames:
InfoOut.Log('No files to test for namespace.')
return 0
InfoOut.SetConsole(False)
ast = ParseFiles(testnames)
InfoOut.SetConsole(True)
errs = ast.GetProperty('ERRORS')
if errs:
ErrOut.Log("Failed namespace test.")
else:
InfoOut.Log("Passed namespace test.")
return errs
default_dirs = ['.', 'trusted', 'dev', 'private']
def ParseFiles(filenames):
parser = IDLParser()
filenodes = []
if not filenames:
filenames = []
srcroot = GetOption('srcroot')
dirs = default_dirs
if GetOption('include_private'):
dirs += ['private']
for dirname in dirs:
srcdir = os.path.join(srcroot, dirname, '*.idl')
srcdir = os.path.normpath(srcdir)
filenames += sorted(glob.glob(srcdir))
if not filenames:
ErrOut.Log('No sources provided.')
for filename in filenames:
filenode = parser.ParseFile(filename)
filenodes.append(filenode)
ast = IDLAst(filenodes)
if GetOption('dump_tree'): ast.Dump(0)
Lint(ast)
return ast
def Main(args):
filenames = ParseOptions(args)
# If testing...
if GetOption('test'):
errs = TestErrorFiles(filenames)
errs = TestNamespaceFiles(filenames)
if errs:
ErrOut.Log("Parser failed with %d errors." % errs)
return -1
return 0
# Otherwise, build the AST
ast = ParseFiles(filenames)
errs = ast.GetProperty('ERRORS')
if errs:
ErrOut.Log('Found %d error(s).' % errs);
InfoOut.Log("%d files processed." % len(filenames))
return errs
if __name__ == '__main__':
sys.exit(Main(sys.argv[1:]))