607 lines
22 KiB
Python
607 lines
22 KiB
Python
#!/usr/bin/env python2
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# Copyright 2017 The Dawn Authors
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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############################################################
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# COMMON
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############################################################
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from collections import namedtuple
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class Name:
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def __init__(self, name, native=False):
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self.native = native
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if native:
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self.chunks = [name]
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else:
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self.chunks = name.split(' ')
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def CamelChunk(self, chunk):
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return chunk[0].upper() + chunk[1:]
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def canonical_case(self):
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return (' '.join(self.chunks)).lower()
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def concatcase(self):
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return ''.join(self.chunks)
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def camelCase(self):
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return self.chunks[0] + ''.join([self.CamelChunk(chunk) for chunk in self.chunks[1:]])
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def CamelCase(self):
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return ''.join([self.CamelChunk(chunk) for chunk in self.chunks])
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def SNAKE_CASE(self):
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return '_'.join([chunk.upper() for chunk in self.chunks])
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def snake_case(self):
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return '_'.join(self.chunks)
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class Type:
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def __init__(self, name, record, native=False):
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self.record = record
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self.dict_name = name
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self.name = Name(name, native=native)
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self.category = record['category']
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self.is_builder = self.name.canonical_case().endswith(" builder")
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EnumValue = namedtuple('EnumValue', ['name', 'value'])
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class EnumType(Type):
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def __init__(self, name, record):
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Type.__init__(self, name, record)
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self.values = [EnumValue(Name(m['name']), m['value']) for m in self.record['values']]
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BitmaskValue = namedtuple('BitmaskValue', ['name', 'value'])
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class BitmaskType(Type):
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def __init__(self, name, record):
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Type.__init__(self, name, record)
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self.values = [BitmaskValue(Name(m['name']), m['value']) for m in self.record['values']]
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self.full_mask = 0
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for value in self.values:
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self.full_mask = self.full_mask | value.value
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class NativeType(Type):
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def __init__(self, name, record):
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Type.__init__(self, name, record, native=True)
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class NativelyDefined(Type):
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def __init__(self, name, record):
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Type.__init__(self, name, record)
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class MethodArgument:
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def __init__(self, name, typ, annotation):
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self.name = name
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self.type = typ
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self.annotation = annotation
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self.length = None
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Method = namedtuple('Method', ['name', 'return_type', 'arguments'])
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class ObjectType(Type):
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def __init__(self, name, record):
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Type.__init__(self, name, record)
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self.methods = []
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self.native_methods = []
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self.built_type = None
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class StructureMember:
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def __init__(self, name, typ, annotation):
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self.name = name
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self.type = typ
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self.annotation = annotation
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self.length = None
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class StructureType(Type):
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def __init__(self, name, record):
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Type.__init__(self, name, record)
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self.extensible = record.get("extensible", False)
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self.members = []
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############################################################
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# PARSE
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############################################################
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import json
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def is_native_method(method):
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return method.return_type.category == "natively defined" or \
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any([arg.type.category == "natively defined" for arg in method.arguments])
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def link_object(obj, types):
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def make_method(record):
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arguments = []
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arguments_by_name = {}
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for a in record.get('args', []):
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arg = MethodArgument(Name(a['name']), types[a['type']], a.get('annotation', 'value'))
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arguments.append(arg)
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arguments_by_name[arg.name.canonical_case()] = arg
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for (arg, a) in zip(arguments, record.get('args', [])):
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if arg.annotation != 'value':
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if not 'length' in a:
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if arg.type.category == 'structure':
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arg.length = "constant"
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arg.constant_length = 1
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else:
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assert(False)
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elif a['length'] == 'strlen':
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arg.length = 'strlen'
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else:
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arg.length = arguments_by_name[a['length']]
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return Method(Name(record['name']), types[record.get('returns', 'void')], arguments)
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methods = [make_method(m) for m in obj.record.get('methods', [])]
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obj.methods = [method for method in methods if not is_native_method(method)]
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obj.native_methods = [method for method in methods if is_native_method(method)]
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# Compute the built object type for builders
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if obj.is_builder:
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for method in obj.methods:
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if method.name.canonical_case() == "get result":
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obj.built_type = method.return_type
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break
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assert(obj.built_type != None)
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def link_structure(struct, types):
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def make_member(m):
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return StructureMember(Name(m['name']), types[m['type']], m.get('annotation', 'value'))
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members = []
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members_by_name = {}
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for m in struct.record['members']:
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member = make_member(m)
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members.append(member)
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members_by_name[member.name.canonical_case()] = member
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struct.members = members
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for (member, m) in zip(members, struct.record['members']):
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# TODO(kainino@chromium.org): More robust pointer/length handling?
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if 'length' in m:
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if m['length'] == 'strlen':
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member.length = 'strlen'
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else:
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member.length = members_by_name[m['length']]
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# Sort structures so that if struct A has struct B as a member, then B is listed before A
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# This is a form of topological sort where we try to keep the order reasonably similar to the
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# original order (though th sort isn't technically stable).
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# It works by computing for each struct type what is the depth of its DAG of dependents, then
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# resorting based on that depth using Python's stable sort. This makes a toposort because if
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# A depends on B then its depth will be bigger than B's. It is also nice because all nodes
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# with the same depth are kept in the input order.
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def topo_sort_structure(structs):
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for struct in structs:
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struct.visited = False
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struct.subdag_depth = 0
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def compute_depth(struct):
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if struct.visited:
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return struct.subdag_depth
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max_dependent_depth = 0
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for member in struct.members:
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if member.type.category == 'structure' and member.annotation == 'value':
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max_dependent_depth = max(max_dependent_depth, compute_depth(member.type) + 1)
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struct.subdag_depth = max_dependent_depth
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struct.visited = True
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return struct.subdag_depth
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for struct in structs:
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compute_depth(struct)
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result = sorted(structs, key=lambda struct: struct.subdag_depth)
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for struct in structs:
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del struct.visited
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del struct.subdag_depth
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return result
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def parse_json(json):
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category_to_parser = {
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'bitmask': BitmaskType,
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'enum': EnumType,
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'native': NativeType,
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'natively defined': NativelyDefined,
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'object': ObjectType,
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'structure': StructureType,
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}
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types = {}
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by_category = {}
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for name in category_to_parser.keys():
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by_category[name] = []
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for (name, record) in json.items():
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if name[0] == '_':
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continue
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category = record['category']
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parsed = category_to_parser[category](name, record)
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by_category[category].append(parsed)
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types[name] = parsed
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for obj in by_category['object']:
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link_object(obj, types)
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for struct in by_category['structure']:
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link_structure(struct, types)
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for category in by_category.keys():
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by_category[category] = sorted(by_category[category], key=lambda typ: typ.name.canonical_case())
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by_category['structure'] = topo_sort_structure(by_category['structure'])
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return {
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'types': types,
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'by_category': by_category
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}
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#############################################################
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# OUTPUT
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#############################################################
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import re, os, sys
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from collections import OrderedDict
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kExtraPythonPath = '--extra-python-path'
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# Try using an additional python path from the arguments if present. This
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# isn't done through the regular argparse because PreprocessingLoader uses
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# jinja2 in the global scope before "main" gets to run.
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if kExtraPythonPath in sys.argv:
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path = sys.argv[sys.argv.index(kExtraPythonPath) + 1]
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sys.path.insert(1, path)
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import jinja2
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# A custom Jinja2 template loader that removes the extra indentation
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# of the template blocks so that the output is correctly indented
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class PreprocessingLoader(jinja2.BaseLoader):
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def __init__(self, path):
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self.path = path
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def get_source(self, environment, template):
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path = os.path.join(self.path, template)
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if not os.path.exists(path):
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raise jinja2.TemplateNotFound(template)
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mtime = os.path.getmtime(path)
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with open(path) as f:
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source = self.preprocess(f.read())
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return source, path, lambda: mtime == os.path.getmtime(path)
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blockstart = re.compile('{%-?\s*(if|for|block)[^}]*%}')
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blockend = re.compile('{%-?\s*end(if|for|block)[^}]*%}')
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def preprocess(self, source):
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lines = source.split('\n')
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# Compute the current indentation level of the template blocks and remove their indentation
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result = []
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indentation_level = 0
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for line in lines:
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# The capture in the regex adds one element per block start or end so we divide by two
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# there is also an extra line chunk corresponding to the line end, so we substract it.
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numends = (len(self.blockend.split(line)) - 1) // 2
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indentation_level -= numends
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line = self.remove_indentation(line, indentation_level)
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# Manually perform the lstrip_blocks jinja2 env options as it available starting from 2.7
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# and Travis only has Jinja 2.6
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if line.lstrip().startswith('{%'):
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line = line.lstrip()
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result.append(line)
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numstarts = (len(self.blockstart.split(line)) - 1) // 2
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indentation_level += numstarts
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return '\n'.join(result) + '\n'
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def remove_indentation(self, line, n):
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for _ in range(n):
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if line.startswith(' '):
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line = line[4:]
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elif line.startswith('\t'):
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line = line[1:]
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else:
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assert(line.strip() == '')
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return line
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FileRender = namedtuple('FileRender', ['template', 'output', 'params_dicts'])
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FileOutput = namedtuple('FileOutput', ['name', 'content'])
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def do_renders(renders, template_dir):
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env = jinja2.Environment(loader=PreprocessingLoader(template_dir), trim_blocks=True, line_comment_prefix='//*')
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outputs = []
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for render in renders:
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params = {}
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for param_dict in render.params_dicts:
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params.update(param_dict)
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content = env.get_template(render.template).render(**params)
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outputs.append(FileOutput(render.output, content))
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return outputs
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#############################################################
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# MAIN SOMETHING WHATEVER
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#############################################################
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import argparse, sys
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def as_varName(*names):
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return names[0].camelCase() + ''.join([name.CamelCase() for name in names[1:]])
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def as_cType(name):
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if name.native:
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return name.concatcase()
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else:
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return 'dawn' + name.CamelCase()
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def as_cppType(name):
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if name.native:
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return name.concatcase()
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else:
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return name.CamelCase()
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def decorate(name, typ, arg):
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if arg.annotation == 'value':
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return typ + ' ' + name
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elif arg.annotation == '*':
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return typ + '* ' + name
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elif arg.annotation == 'const*':
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return typ + ' const * ' + name
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else:
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assert(False)
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def annotated(typ, arg):
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name = as_varName(arg.name)
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return decorate(name, typ, arg)
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def as_cEnum(type_name, value_name):
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assert(not type_name.native and not value_name.native)
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return 'DAWN' + '_' + type_name.SNAKE_CASE() + '_' + value_name.SNAKE_CASE()
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def as_cppEnum(value_name):
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assert(not value_name.native)
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if value_name.concatcase()[0].isdigit():
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return "e" + value_name.CamelCase()
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return value_name.CamelCase()
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def as_cMethod(type_name, method_name):
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assert(not type_name.native and not method_name.native)
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return 'dawn' + type_name.CamelCase() + method_name.CamelCase()
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def as_MethodSuffix(type_name, method_name):
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assert(not type_name.native and not method_name.native)
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return type_name.CamelCase() + method_name.CamelCase()
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def as_cProc(type_name, method_name):
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assert(not type_name.native and not method_name.native)
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return 'dawn' + 'Proc' + type_name.CamelCase() + method_name.CamelCase()
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def as_frontendType(typ):
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if typ.category == 'object':
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if typ.is_builder:
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return typ.name.CamelCase() + '*'
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else:
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return typ.name.CamelCase() + 'Base*'
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elif typ.category in ['bitmask', 'enum']:
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return 'dawn::' + typ.name.CamelCase()
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elif typ.category == 'structure':
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return as_cppType(typ.name)
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else:
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return as_cType(typ.name)
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def cpp_native_methods(types, typ):
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methods = typ.methods + typ.native_methods
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if typ.is_builder:
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methods.append(Method(Name('set error callback'), types['void'], [
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MethodArgument(Name('callback'), types['builder error callback'], 'value'),
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MethodArgument(Name('userdata1'), types['callback userdata'], 'value'),
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MethodArgument(Name('userdata2'), types['callback userdata'], 'value'),
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]))
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return methods
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def c_native_methods(types, typ):
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return cpp_native_methods(types, typ) + [
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Method(Name('reference'), types['void'], []),
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Method(Name('release'), types['void'], []),
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]
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def js_native_methods(types, typ):
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return cpp_native_methods(types, typ)
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def debug(text):
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print(text)
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def get_renders_for_targets(api_params, targets):
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base_params = {
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'enumerate': enumerate,
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'format': format,
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'len': len,
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'debug': debug,
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'Name': lambda name: Name(name),
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'as_annotated_cType': lambda arg: annotated(as_cType(arg.type.name), arg),
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'as_annotated_cppType': lambda arg: annotated(as_cppType(arg.type.name), arg),
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'as_cEnum': as_cEnum,
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'as_cppEnum': as_cppEnum,
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'as_cMethod': as_cMethod,
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'as_MethodSuffix': as_MethodSuffix,
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'as_cProc': as_cProc,
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'as_cType': as_cType,
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'as_cppType': as_cppType,
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'as_varName': as_varName,
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'decorate': decorate,
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}
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renders = []
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c_params = {'native_methods': lambda typ: c_native_methods(api_params['types'], typ)}
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cpp_params = {'native_methods': lambda typ: cpp_native_methods(api_params['types'], typ)}
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if 'dawn_headers' in targets:
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renders.append(FileRender('api.h', 'dawn/dawn.h', [base_params, api_params, c_params]))
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renders.append(FileRender('apicpp.h', 'dawn/dawncpp.h', [base_params, api_params, cpp_params]))
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renders.append(FileRender('apicpp_traits.h', 'dawn/dawncpp_traits.h', [base_params, api_params, cpp_params]))
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if 'libdawn' in targets:
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additional_params = {'native_methods': lambda typ: cpp_native_methods(api_params['types'], typ)}
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renders.append(FileRender('api.c', 'dawn/dawn.c', [base_params, api_params, c_params]))
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renders.append(FileRender('apicpp.cpp', 'dawn/dawncpp.cpp', [base_params, api_params, cpp_params]))
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if 'mock_dawn' in targets:
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renders.append(FileRender('mock_api.h', 'mock/mock_dawn.h', [base_params, api_params, c_params]))
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renders.append(FileRender('mock_api.cpp', 'mock/mock_dawn.cpp', [base_params, api_params, c_params]))
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if 'dawn_native_utils' in targets:
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frontend_params = [
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base_params,
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api_params,
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c_params,
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{
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'as_frontendType': lambda typ: as_frontendType(typ), # TODO as_frontendType and friends take a Type and not a Name :(
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'as_annotated_frontendType': lambda arg: annotated(as_frontendType(arg.type), arg)
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}
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]
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renders.append(FileRender('dawn_native/ValidationUtils.h', 'dawn_native/ValidationUtils_autogen.h', frontend_params))
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renders.append(FileRender('dawn_native/ValidationUtils.cpp', 'dawn_native/ValidationUtils_autogen.cpp', frontend_params))
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renders.append(FileRender('dawn_native/api_structs.h', 'dawn_native/dawn_structs_autogen.h', frontend_params))
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renders.append(FileRender('dawn_native/api_structs.cpp', 'dawn_native/dawn_structs_autogen.cpp', frontend_params))
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renders.append(FileRender('dawn_native/ProcTable.cpp', 'dawn_native/ProcTable.cpp', frontend_params))
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if 'dawn_wire' in targets:
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wire_params = [
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base_params,
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api_params,
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c_params,
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|
{
|
|
'as_wireType': lambda typ: typ.name.CamelCase() + '*' if typ.category == 'object' else as_cppType(typ.name)
|
|
}
|
|
]
|
|
renders.append(FileRender('dawn_wire/WireCmd.h', 'dawn_wire/WireCmd_autogen.h', wire_params))
|
|
renders.append(FileRender('dawn_wire/WireCmd.cpp', 'dawn_wire/WireCmd_autogen.cpp', wire_params))
|
|
renders.append(FileRender('dawn_wire/WireClient.cpp', 'dawn_wire/WireClient.cpp', wire_params))
|
|
renders.append(FileRender('dawn_wire/WireServer.cpp', 'dawn_wire/WireServer.cpp', wire_params))
|
|
|
|
return renders
|
|
|
|
def output_to_files(outputs, output_dir):
|
|
for output in outputs:
|
|
output_file = output_dir + os.path.sep + output.name
|
|
directory = os.path.dirname(output_file)
|
|
if not os.path.exists(directory):
|
|
os.makedirs(directory)
|
|
|
|
with open(output_file, 'w') as outfile:
|
|
outfile.write(output.content)
|
|
|
|
def output_to_json(outputs, output_json):
|
|
json_root = {}
|
|
for output in outputs:
|
|
json_root[output.name] = output.content
|
|
|
|
with open(output_json, 'w') as f:
|
|
f.write(json.dumps(json_root))
|
|
|
|
def output_depfile(depfile, output, dependencies):
|
|
with open(depfile, 'w') as f:
|
|
f.write(output + ": " + " ".join(dependencies))
|
|
|
|
def main():
|
|
allowed_targets = ['dawn_headers', 'libdawn', 'mock_dawn', 'dawn_wire', "dawn_native_utils"]
|
|
|
|
parser = argparse.ArgumentParser(
|
|
description = 'Generates code for various target for Dawn.',
|
|
formatter_class = argparse.ArgumentDefaultsHelpFormatter
|
|
)
|
|
parser.add_argument('json', metavar='DAWN_JSON', nargs=1, type=str, help ='The DAWN JSON definition to use.')
|
|
parser.add_argument('-t', '--template-dir', default='templates', type=str, help='Directory with template files.')
|
|
parser.add_argument('-T', '--targets', required=True, type=str, help='Comma-separated subset of targets to output. Available targets: ' + ', '.join(allowed_targets))
|
|
# Arguments used only for the GN build
|
|
parser.add_argument(kExtraPythonPath, default=None, type=str, help='Additional python path to set before loading Jinja2')
|
|
parser.add_argument('--output-json-tarball', default=None, type=str, help='Name of the "JSON tarball" to create (tar is too annoying to use in python).')
|
|
parser.add_argument('--depfile', default=None, type=str, help='Name of the Ninja depfile to create for the JSON tarball')
|
|
parser.add_argument('--expected-outputs-file', default=None, type=str, help="File to compare outputs with and fail if it doesn't match")
|
|
# Arguments used only for the CMake build
|
|
parser.add_argument('-o', '--output-dir', default=None, type=str, help='Output directory for the generated source files.')
|
|
parser.add_argument('--print-dependencies', action='store_true', help='Prints a space separated list of file dependencies, used for CMake integration')
|
|
parser.add_argument('--print-outputs', action='store_true', help='Prints a space separated list of file outputs, used for CMake integration')
|
|
|
|
args = parser.parse_args()
|
|
|
|
# Load and parse the API json file
|
|
with open(args.json[0]) as f:
|
|
loaded_json = json.loads(f.read())
|
|
api_params = parse_json(loaded_json)
|
|
|
|
targets = args.targets.split(',')
|
|
renders = get_renders_for_targets(api_params, targets)
|
|
|
|
# Print outputs and dependencies for CMake
|
|
if args.print_dependencies:
|
|
dependencies = set(
|
|
[os.path.abspath(args.template_dir + os.path.sep + render.template) for render in renders] +
|
|
[os.path.abspath(args.json[0])] +
|
|
[os.path.realpath(__file__)]
|
|
)
|
|
dependencies = [dependency.replace('\\', '/') for dependency in dependencies]
|
|
sys.stdout.write(';'.join(dependencies))
|
|
return 0
|
|
|
|
if args.print_outputs:
|
|
outputs = set(
|
|
[os.path.abspath(args.output_dir + os.path.sep + render.output) for render in renders]
|
|
)
|
|
outputs = [output.replace('\\', '/') for output in outputs]
|
|
sys.stdout.write(';'.join(outputs))
|
|
return 0
|
|
|
|
# The caller wants to assert that the outputs are what it expects.
|
|
# Load the file and compare with our renders. GN-only.
|
|
if args.expected_outputs_file != None:
|
|
with open(args.expected_outputs_file) as f:
|
|
expected = set([line.strip() for line in f.readlines()])
|
|
|
|
actual = set()
|
|
actual.update([render.output for render in renders])
|
|
|
|
if actual != expected:
|
|
print("Wrong expected outputs, caller expected:\n " + repr(list(expected)))
|
|
print("Actual output:\n " + repr(list(actual)))
|
|
return 1
|
|
|
|
outputs = do_renders(renders, args.template_dir)
|
|
|
|
# CMake only: output all the files directly.
|
|
if args.output_dir != None:
|
|
output_to_files(outputs, args.output_dir)
|
|
|
|
# GN only: output the tarball and its depfile
|
|
if args.output_json_tarball != None:
|
|
output_to_json(outputs, args.output_json_tarball)
|
|
|
|
dependencies = [args.template_dir + os.path.sep + render.template for render in renders]
|
|
dependencies.append(args.json[0])
|
|
output_depfile(args.depfile, args.output_json_tarball, dependencies)
|
|
|
|
if __name__ == '__main__':
|
|
sys.exit(main())
|