def parse_inst(self, args):
""" Returns a parsed component instance. """
inst, libname, libnum, x, y, rot, _scale, _b = args.split()
# scale is a floating point scaling constant. Also, evil.
thisinst = ComponentInstance(inst, self.lookup(libname, libnum), 0)
if int(rot) > 3:
# part is flipped around y-axis. When applying transforms, flip it
# first, then rotate it.
rot = str(int(rot) - 4)
# flip = True
thisinst.add_symbol_attribute(SymbolAttribute(int(x), int(y),
float(rot) / 2))
subdata = defaultdict(list)
for phrase in self.stream:
cmd, _sep, args = phrase.partition(' ')
if cmd not in ('|R', 'A', 'C'):
self.stream.push(phrase)
break
k, v = self.parsenode(cmd)(args)
subdata[k].append(v)
for annot in subdata['annot']:
thisinst.symbol_attributes[0].add_annotation(annot)
if '=' in annot.value:
thisinst.add_attribute(*(annot.value.split('=', 1)))
# Turns out C can reference a net before it's been created via
# the N command. Really don't like passing stuff inband like this. Ugh.
thisinst.conns = subdata['conn']
return ('inst', thisinst)
def parse_component_instances(self, component_instances):
""" Extract the component instances. """
for instance in component_instances:
# Get instance_id, library_id and symbol_index
instance_id = instance.get('instance_id')
library_id = instance.get('library_id')
symbol_index = int(instance.get('symbol_index'))
# Make the ComponentInstance()
inst = ComponentInstance(instance_id, library_id, symbol_index)
# Get the SymbolAttributes
for symbol_attribute in instance.get('symbol_attributes'):
attr = self.parse_symbol_attribute(symbol_attribute)
inst.add_symbol_attribute(attr)
# Get the Attributes
for key, value in instance.get('attributes').items():
inst.add_attribute(key, value)
# Add the ComponentInstance
self.design.add_component_instance(inst)
def parse_component(self, stream, params):
""" Creates a component instance according to the component *params*.
If the component is not known in the library, a the component
will be created according to its description in the embedded
environment ``[]`` or a symbol file. The component is added
to the library automatically if necessary.
An instance of this component will be created and added to
the design.
A GEDAError is raised when either the component file
is invalid or the referenced symbol file cannot be found
in the known directories.
Returns a tuple of Component and ComponentInstance objects.
"""
basename, dummy = os.path.splitext(params['basename'])
component_name = basename
if params['mirror']:
component_name += '_MIRRORED'
if component_name in self.design.components.components:
component = self.design.components.components[component_name]
## skipping embedded data might be required
self.skip_embedded_section(stream)
else:
##check if sym file is embedded or referenced
if basename.startswith('EMBEDDED'):
## embedded only has to be processed when NOT in symbol lookup
if basename not in self.known_symbols:
component = self.parse_component_data(stream, params)
else:
if basename not in self.known_symbols:
log.warn("referenced symbol file '%s' unknown" % basename)
## parse optional attached environment before continuing
self._parse_environment(stream)
return None, None
## requires parsing of referenced symbol file
f_in = open(self.known_symbols[basename], "rU")
self._check_version(f_in)
component = self.parse_component_data(f_in, params)
f_in.close()
self.design.add_component(component_name, component)
## get all attributes assigned to component instance
attributes = self._parse_environment(stream)
## refdes attribute is name of component (mandatory as of gEDA doc)
## examples if gaf repo have components without refdes, use part of
## basename
if attributes is not None:
instance = ComponentInstance(
attributes.get('_refdes', component.name),
component.name,
0
)
for key, value in attributes.items():
instance.add_attribute(key, value)
else:
instance = ComponentInstance(
component.name,
component.name,
0
)
## generate a component instance using attributes
self.design.add_component_instance(instance)
symbol = SymbolAttribute(
self.x_to_px(params['x']),
self.y_to_px(params['y']),
self.conv_angle(params['angle'])
)
instance.add_symbol_attribute(symbol)
## add annotation for special attributes
for idx, attribute_key in enumerate(['_refdes', 'device']):
if attribute_key in component.attributes \
or attribute_key in instance.attributes:
symbol.add_annotation(
Annotation(
'{{%s}}' % attribute_key,
0, 0+idx*10, 0.0, 'true'
)
)
return component, instance
