# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
__all__ = [
"gencxx",
"genipdl",
"parse",
"typecheck",
"writeifmodified",
"checkSyncMessage",
"checkFixedSyncMessages",
]
import os
import sys
from io
import StringIO
from ipdl.cgen
import IPDLCodeGen
from ipdl.lower
import LowerToCxx, msgenums
from ipdl.parser
import Parser, ParseError
from ipdl.type
import TypeCheck
from ipdl.checker
import checkSyncMessage, checkFixedSyncMessages
from ipdl.cxx.cgen
import CxxCodeGen
def parse(specstring, filename=
"/stdin", includedirs=[], errout=sys.stderr):
"""Return an IPDL AST if parsing was successful. Print errors to |errout|
if it
is not.
"""
# The file type and name are later enforced by the type checker.
# This is just a hint to the parser.
prefix, ext = os.path.splitext(filename)
name = os.path.basename(prefix)
if ext ==
".ipdlh":
type =
"header"
else:
type =
"protocol"
try:
return Parser(type, name).parse(
specstring, os.path.abspath(filename), includedirs
)
except ParseError
as p:
print(p, file=errout)
return None
def typecheck(ast, errout=sys.stderr):
"""Return True iff |ast| is well typed. Print errors to |errout| if
it
is not.
"""
return TypeCheck().check(ast, errout)
def gencxx(ipdlfilename, ast, outheadersdir, outcppdir, segmentcapacitydict):
headers, cpps = LowerToCxx().lower(ast, segmentcapacitydict)
def resolveHeader(hdr):
return [
hdr,
os.path.join(
outheadersdir, *([ns.name
for ns
in ast.namespaces] + [hdr.name])
),
]
def resolveCpp(cpp):
return [cpp, os.path.join(outcppdir, cpp.name)]
for ast, filename
in [resolveHeader(hdr)
for hdr
in headers] + [
resolveCpp(cpp)
for cpp
in cpps
]:
tempfile = StringIO()
CxxCodeGen(tempfile).cgen(ast)
writeifmodified(tempfile.getvalue(), filename)
def genipdl(ast, outdir):
return ast.accept(IPDLCodeGen())
def genmsgenum(ast):
return msgenums(ast.protocol, pretty=
True)
def writeifmodified(contents, file):
contents = contents.encode(
"utf-8")
dir = os.path.dirname(file)
os.makedirs(dir, exist_ok=
True)
oldcontents =
None
if os.path.exists(file):
fd = open(file,
"rb")
oldcontents = fd.read()
fd.close()
if oldcontents != contents:
fd = open(file,
"wb")
fd.write(contents)
fd.close()