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|
#
# idlparse.py
#
# an example of using the parsing module to be able to process a subset of the CORBA IDL grammar
#
# Copyright (c) 2003, Paul McGuire
#
from pyparsing import Literal, CaselessLiteral, Word, Upcase, OneOrMore, ZeroOrMore, \
Forward, NotAny, delimitedList, oneOf, Group, Optional, Combine, alphas, nums, restOfLine, cStyleComment, \
alphanums, printables, empty, quotedString, ParseException, ParseResults, Keyword, Regex
import pprint
#~ import tree2image
bnf = None
def CORBA_IDL_BNF():
global bnf
if not bnf:
# punctuation
colon = Literal(":")
lbrace = Literal("{")
rbrace = Literal("}")
lbrack = Literal("[")
rbrack = Literal("]")
lparen = Literal("(")
rparen = Literal(")")
equals = Literal("=")
comma = Literal(",")
dot = Literal(".")
slash = Literal("/")
bslash = Literal("\\")
star = Literal("*")
semi = Literal(";")
langle = Literal("<")
rangle = Literal(">")
# keywords
any_ = Keyword("any")
attribute_ = Keyword("attribute")
boolean_ = Keyword("boolean")
case_ = Keyword("case")
char_ = Keyword("char")
const_ = Keyword("const")
context_ = Keyword("context")
default_ = Keyword("default")
double_ = Keyword("double")
enum_ = Keyword("enum")
exception_ = Keyword("exception")
false_ = Keyword("FALSE")
fixed_ = Keyword("fixed")
float_ = Keyword("float")
inout_ = Keyword("inout")
interface_ = Keyword("interface")
in_ = Keyword("in")
long_ = Keyword("long")
module_ = Keyword("module")
object_ = Keyword("Object")
octet_ = Keyword("octet")
oneway_ = Keyword("oneway")
out_ = Keyword("out")
raises_ = Keyword("raises")
readonly_ = Keyword("readonly")
sequence_ = Keyword("sequence")
short_ = Keyword("short")
string_ = Keyword("string")
struct_ = Keyword("struct")
switch_ = Keyword("switch")
true_ = Keyword("TRUE")
typedef_ = Keyword("typedef")
unsigned_ = Keyword("unsigned")
union_ = Keyword("union")
void_ = Keyword("void")
wchar_ = Keyword("wchar")
wstring_ = Keyword("wstring")
identifier = Word( alphas, alphanums + "_" ).setName("identifier")
#~ real = Combine( Word(nums+"+-", nums) + dot + Optional( Word(nums) )
#~ + Optional( CaselessLiteral("E") + Word(nums+"+-",nums) ) )
real = Regex(r"[+-]?\d+\.\d*([Ee][+-]?\d+)?").setName("real")
#~ integer = ( Combine( CaselessLiteral("0x") + Word( nums+"abcdefABCDEF" ) ) |
#~ Word( nums+"+-", nums ) ).setName("int")
integer = Regex(r"0x[0-9a-fA-F]+|[+-]?\d+").setName("int")
udTypeName = delimitedList( identifier, "::", combine=True ).setName("udType")
# have to use longest match for type, in case a user-defined type name starts with a keyword type, like "stringSeq" or "longArray"
typeName = ( any_ ^ boolean_ ^ char_ ^ double_ ^ fixed_ ^
float_ ^ long_ ^ octet_ ^ short_ ^ string_ ^
wchar_ ^ wstring_ ^ udTypeName ).setName("type")
sequenceDef = Forward().setName("seq")
sequenceDef << Group( sequence_ + langle + ( sequenceDef | typeName ) + rangle )
typeDef = sequenceDef | ( typeName + Optional( lbrack + integer + rbrack ) )
typedefDef = Group( typedef_ + typeDef + identifier + semi ).setName("typedef")
moduleDef = Forward()
constDef = Group( const_ + typeDef + identifier + equals + ( real | integer | quotedString ) + semi ) #| quotedString )
exceptionItem = Group( typeDef + identifier + semi )
exceptionDef = ( exception_ + identifier + lbrace + ZeroOrMore( exceptionItem ) + rbrace + semi )
attributeDef = Optional( readonly_ ) + attribute_ + typeDef + identifier + semi
paramlist = delimitedList( Group( ( inout_ | in_ | out_ ) + typeName + identifier ) ).setName( "paramlist" )
operationDef = ( ( void_ ^ typeDef ) + identifier + lparen + Optional( paramlist ) + rparen + \
Optional( raises_ + lparen + Group( delimitedList( typeName ) ) + rparen ) + semi )
interfaceItem = ( constDef | exceptionDef | attributeDef | operationDef )
interfaceDef = Group( interface_ + identifier + Optional( colon + delimitedList( typeName ) ) + lbrace + \
ZeroOrMore( interfaceItem ) + rbrace + semi ).setName("opnDef")
moduleItem = ( interfaceDef | exceptionDef | constDef | typedefDef | moduleDef )
moduleDef << module_ + identifier + lbrace + ZeroOrMore( moduleItem ) + rbrace + semi
bnf = ( moduleDef | OneOrMore( moduleItem ) )
singleLineComment = "//" + restOfLine
bnf.ignore( singleLineComment )
bnf.ignore( cStyleComment )
return bnf
testnum = 1
def test( strng ):
global testnum
print strng
try:
bnf = CORBA_IDL_BNF()
tokens = bnf.parseString( strng )
print "tokens = "
pprint.pprint( tokens.asList() )
imgname = "idlParse%02d.bmp" % testnum
testnum += 1
#~ tree2image.str2image( str(tokens.asList()), imgname )
except ParseException, err:
print err.line
print " "*(err.column-1) + "^"
print err
print
if __name__ == "__main__":
test(
"""
/*
* a block comment *
*/
typedef string[10] tenStrings;
typedef sequence<string> stringSeq;
typedef sequence< sequence<string> > stringSeqSeq;
interface QoSAdmin {
stringSeq method1( in string arg1, inout long arg2 );
stringSeqSeq method2( in string arg1, inout long arg2, inout long arg3);
string method3();
};
"""
)
test(
"""
/*
* a block comment *
*/
typedef string[10] tenStrings;
typedef
/** ** *** **** *
* a block comment *
*/
sequence<string> /*comment inside an And */ stringSeq;
/* */ /**/ /***/ /****/
typedef sequence< sequence<string> > stringSeqSeq;
interface QoSAdmin {
stringSeq method1( in string arg1, inout long arg2 );
stringSeqSeq method2( in string arg1, inout long arg2, inout long arg3);
string method3();
};
"""
)
test(
r"""
const string test="Test String\n";
const long a = 0;
const long b = -100;
const float c = 3.14159;
const long d = 0x007f7f7f;
exception TestException
{
string msg;
sequence<string> dataStrings;
};
interface TestInterface
{
void method1( in string arg1, inout long arg2 );
};
"""
)
test(
"""
module Test1
{
exception TestException
{
string msg;
];
interface TestInterface
{
void method1( in string arg1, inout long arg2 )
raises ( TestException );
};
};
"""
)
test(
"""
module Test1
{
exception TestException
{
string msg;
};
};
"""
)
|
