#!/usr/bin/env python
# Copyright 2012 The Chromium Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
""" Generator for C style prototypes and definitions """
from __future__ import print_function
import glob
import os
import re
import sys
from idl_log import ErrOut, InfoOut, WarnOut
from idl_node import IDLAttribute, IDLNode
from idl_ast import IDLAst
from idl_option import GetOption, Option, ParseOptions
from idl_outfile import IDLOutFile
from idl_parser import ParseFiles
from idl_c_proto import CGen, GetNodeComments, CommentLines, Comment
from idl_generator import Generator, GeneratorByFile
from idl_visitor import IDLVisitor
Option('dstroot', 'Base directory of output', default=os.path.join('..', 'c'))
Option('guard', 'Include guard prefix', default=os.path.join('ppapi', 'c'))
#
# PrototypeResolver
#
# A specialized visitor which traverses the AST, building a mapping of
# Release names to Versions numbers and calculating a min version.
# The mapping is applied to the File nodes within the AST.
#
class ProtoResolver(IDLVisitor):
def __init__(self):
IDLVisitor.__init__(self)
self.struct_map = {}
self.interface_map = {}
def Arrive(self, node, ignore):
if node.IsA('Member') and node.GetProperty('ref'):
typeref = node.typelist.GetReleases()[0]
if typeref.IsA('Struct'):
nodelist = self.struct_map.get(typeref.GetName(), [])
nodelist.append(node)
self.struct_map[typeref.GetName()] = nodelist
if node.IsA('Param'):
typeref = node.typelist.GetReleases()[0]
if typeref.IsA('Interface'):
nodelist = self.struct_map.get(typeref.GetName(), [])
nodelist.append(node)
self.interface_map[typeref.GetName()] = nodelist
return None
def GetPathFromNode(filenode, relpath=None, ext=None):
path, name = os.path.split(filenode.GetProperty('NAME'))
if ext: name = os.path.splitext(name)[0] + ext
if path: name = os.path.join(path, name)
if relpath: name = os.path.join(relpath, name)
name = os.path.normpath(name)
return name
def GetHeaderFromNode(filenode, relpath=None):
return GetPathFromNode(filenode, relpath, ext='.h')
def WriteGroupMarker(out, node, last_group):
# If we are part of a group comment marker...
if last_group and last_group != node.cls:
pre = CommentLines(['*',' @}', '']) + '\n'
else:
pre = '\n'
if node.cls in ['Typedef', 'Interface', 'Struct', 'Enum']:
if last_group != node.cls:
pre += CommentLines(['*',' @addtogroup %ss' % node.cls, ' @{', ''])
last_group = node.cls
else:
last_group = None
out.Write(pre)
return last_group
def GenerateHeader(out, filenode, releases):
cgen = CGen()
pref = ''
do_comments = True
# Generate definitions.
last_group = None
top_types = ['Typedef', 'Interface', 'Struct', 'Enum', 'Inline']
for node in filenode.GetListOf(*top_types):
# Skip if this node is not in this release
if not node.InReleases(releases):
print("Skiping %s" % node)
continue
# End/Start group marker
if do_comments:
last_group = WriteGroupMarker(out, node, last_group)
if node.IsA('Inline'):
item = node.GetProperty('VALUE')
# If 'C++' use __cplusplus wrapper
if node.GetName() == 'cc':
item = '#ifdef __cplusplus\n%s\n#endif /* __cplusplus */\n\n' % item
# If not C++ or C, then skip it
elif not node.GetName() == 'c':
continue
if item: out.Write(item)
continue
#
# Otherwise we are defining a file level object, so generate the
# correct document notation.
#
item = cgen.Define(node, releases, prefix=pref, comment=True)
if not item: continue
asize = node.GetProperty('assert_size()')
if asize:
name = '%s%s' % (pref, node.GetName())
if node.IsA('Struct'):
form = 'PP_COMPILE_ASSERT_STRUCT_SIZE_IN_BYTES(%s, %s);\n'
elif node.IsA('Enum'):
if node.GetProperty('notypedef'):
form = 'PP_COMPILE_ASSERT_ENUM_SIZE_IN_BYTES(%s, %s);\n'
else:
form = 'PP_COMPILE_ASSERT_SIZE_IN_BYTES(%s, %s);\n'
else:
form = 'PP_COMPILE_ASSERT_SIZE_IN_BYTES(%s, %s);\n'
item += form % (name, asize[0])
if item: out.Write(item)
if last_group:
out.Write(CommentLines(['*',' @}', '']) + '\n')
def CheckTypedefs(filenode, releases):
"""Checks that typedefs don't specify callbacks that take some structs.
See http://crbug.com/233439 for details.
"""
cgen = CGen()
for node in filenode.GetListOf('Typedef'):
build_list = node.GetUniqueReleases(releases)
callnode = node.GetOneOf('Callspec')
if callnode:
for param in callnode.GetListOf('Param'):
if param.GetListOf('Array'):
continue
if cgen.GetParamMode(param) != 'in':
continue
t = param.GetType(build_list[0])
while t.IsA('Typedef'):
t = t.GetType(build_list[0])
if t.IsA('Struct') and t.GetProperty('passByValue'):
raise Exception('%s is a struct in callback %s. '
'See http://crbug.com/233439' %
(t.GetName(), node.GetName()))
def CheckPassByValue(filenode, releases):
"""Checks that new pass-by-value structs are not introduced.
See http://crbug.com/233439 for details.
"""
cgen = CGen()
# DO NOT add any more entries to this whitelist.
# http://crbug.com/233439
type_whitelist = ['PP_ArrayOutput', 'PP_CompletionCallback',
'PP_Ext_EventListener', 'PP_FloatPoint',
'PP_Point', 'PP_TouchPoint', 'PP_Var']
nodes_to_check = filenode.GetListOf('Struct')
nodes_to_check.extend(filenode.GetListOf('Union'))
for node in nodes_to_check:
if node.GetName() in type_whitelist:
continue
build_list = node.GetUniqueReleases(releases)
if node.GetProperty('passByValue'):
raise Exception('%s is a new passByValue struct or union. '
'See http://crbug.com/233439' % node.GetName())
if node.GetProperty('returnByValue'):
raise Exception('%s is a new returnByValue struct or union. '
'See http://crbug.com/233439' % node.GetName())
class HGen(GeneratorByFile):
def __init__(self):
Generator.__init__(self, 'C Header', 'cgen', 'Generate the C headers.')
def GenerateFile(self, filenode, releases, options):
CheckTypedefs(filenode, releases)
CheckPassByValue(filenode, releases)
savename = GetHeaderFromNode(filenode, GetOption('dstroot'))
my_min, my_max = filenode.GetMinMax(releases)
if my_min > releases[-1] or my_max < releases[0]:
if os.path.isfile(savename):
print("Removing stale %s for this range." % filenode.GetName())
os.remove(os.path.realpath(savename))
return False
out = IDLOutFile(savename)
self.GenerateHead(out, filenode, releases, options)
self.GenerateBody(out, filenode, releases, options)
self.GenerateTail(out, filenode, releases, options)
return out.Close()
def GenerateHead(self, out, filenode, releases, options):
__pychecker__ = 'unusednames=options'
proto = ProtoResolver()
proto.Visit(filenode, None)
cgen = CGen()
gpath = GetOption('guard')
def_guard = GetHeaderFromNode(filenode, relpath=gpath)
def_guard = def_guard.replace(os.sep,'_').replace('.','_').upper() + '_'
cright_node = filenode.GetChildren()[0]
assert(cright_node.IsA('Copyright'))
fileinfo = filenode.GetChildren()[1]
assert(fileinfo.IsA('Comment'))
out.Write('%s\n' % cgen.Copyright(cright_node))
# Wrap the From ... modified ... comment if it would be >80 characters.
from_text = 'From %s' % GetPathFromNode(filenode).replace(os.sep, '/')
modified_text = 'modified %s.' % (
filenode.GetProperty('DATETIME'))
if len(from_text) + len(modified_text) < 74:
out.Write('/* %s %s */\n\n' % (from_text, modified_text))
else:
out.Write('/* %s,\n * %s\n */\n\n' % (from_text, modified_text))
out.Write('#ifndef %s\n#define %s\n\n' % (def_guard, def_guard))
# Generate set of includes
deps = set()
for release in releases:
deps |= filenode.GetDeps(release)
includes = set([])
for dep in deps:
depfile = dep.GetProperty('FILE')
if depfile:
includes.add(depfile)
includes = [GetHeaderFromNode(
include, relpath=gpath).replace(os.sep, '/') for include in includes]
includes.append('ppapi/c/pp_macros.h')
# Assume we need stdint if we "include" C or C++ code
if filenode.GetListOf('Include'):
includes.append('ppapi/c/pp_stdint.h')
includes = sorted(set(includes))
cur_include = GetHeaderFromNode(filenode,
relpath=gpath).replace(os.sep, '/')
for include in includes:
if include == cur_include: continue
out.Write('#include "%s"\n' % include)
# Generate Prototypes
if proto.struct_map:
out.Write('\n/* Struct prototypes */\n')
for struct in proto.struct_map:
out.Write('struct %s;\n' % struct)
# Create a macro for the highest available release number.
if filenode.GetProperty('NAME').endswith('pp_macros.idl'):
releasestr = ' '.join(releases)
if releasestr:
release_numbers = re.findall('[\d\_]+', releasestr)
release = re.findall('\d+', release_numbers[-1])[0]
if release:
out.Write('#define PPAPI_RELEASE %s\n' % release)
# Generate all interface defines
out.Write('\n')
for node in filenode.GetListOf('Interface'):
idefs = ''
macro = cgen.GetInterfaceMacro(node)
unique = node.GetUniqueReleases(releases)
# Skip this interface if there are no matching versions
if not unique: continue
# Skip this interface if it should have no interface string.
if node.GetProperty('no_interface_string'): continue
last_stable_ver = None
last_dev_rel = None
for rel in unique:
channel = node.GetProperty('FILE').release_map.GetChannel(rel)
if channel == 'dev':
last_dev_rel = rel
for rel in unique:
version = node.GetVersion(rel)
name = cgen.GetInterfaceString(node, version)
strver = str(version).replace('.', '_')
channel = node.GetProperty('FILE').release_map.GetChannel(rel)
if channel == 'dev':
# Skip dev channel interface versions that are
# Not the newest version, and
# Don't have an equivalent stable version.
if rel != last_dev_rel and not node.DevInterfaceMatchesStable(rel):
continue
value_string = '"%s" /* dev */' % name
else:
value_string = '"%s"' % name
last_stable_ver = strver
idefs += cgen.GetDefine('%s_%s' % (macro, strver), value_string)
if last_stable_ver:
idefs += cgen.GetDefine(macro, '%s_%s' % (macro, last_stable_ver))
idefs += '\n'
out.Write(idefs)
# Generate the @file comment
out.Write('%s\n' % Comment(fileinfo, prefix='*\n @file'))
def GenerateBody(self, out, filenode, releases, options):
__pychecker__ = 'unusednames=options'
GenerateHeader(out, filenode, releases)
def GenerateTail(self, out, filenode, releases, options):
__pychecker__ = 'unusednames=options,releases'
gpath = GetOption('guard')
def_guard = GetPathFromNode(filenode, relpath=gpath, ext='.h')
def_guard = def_guard.replace(os.sep,'_').replace('.','_').upper() + '_'
out.Write('#endif /* %s */\n\n' % def_guard)
hgen = HGen()
def main(args):
# Default invocation will verify the golden files are unchanged.
failed = 0
if not args:
args = ['--wnone', '--diff', '--test', '--dstroot=.']
ParseOptions(args)
idldir = os.path.split(sys.argv[0])[0]
idldir = os.path.join(idldir, 'test_cgen', '*.idl')
filenames = glob.glob(idldir)
ast = ParseFiles(filenames)
if hgen.GenerateRelease(ast, 'M14', {}):
print("Golden file for M14 failed.")
failed = 1
else:
print("Golden file for M14 passed.")
idldir = os.path.split(sys.argv[0])[0]
idldir = os.path.join(idldir, 'test_cgen_range', '*.idl')
filenames = glob.glob(idldir)
ast = ParseFiles(filenames)
if hgen.GenerateRange(ast, ['M13', 'M14', 'M15', 'M16', 'M17'], {}):
print("Golden file for M13-M17 failed.")
failed =1
else:
print("Golden file for M13-M17 passed.")
return failed
if __name__ == '__main__':
sys.exit(main(sys.argv[1:]))
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