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"""
Copyright 2008, 2009 Free Software Foundation, Inc.
This file is part of GNU Radio
GNU Radio Companion is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
GNU Radio Companion is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
"""
from .. base.Block import Block as _Block
import extract_docs
import extract_category
class Block(_Block):
##for make source to keep track of indexes
_source_count = 0
##for make sink to keep track of indexes
_sink_count = 0
def __init__(self, flow_graph, n):
"""
Make a new block from nested data.
@param flow graph the parent element
@param n the nested odict
@return block a new block
"""
#grab the data
self._doc = n.find('doc') or ''
self._imports = map(lambda i: i.strip(), n.findall('import'))
self._make = n.find('make')
self._var_make = n.find('var_make')
self._checks = n.findall('check')
self._callbacks = n.findall('callback')
#build the block
_Block.__init__(
self,
flow_graph=flow_graph,
n=n,
)
def validate(self):
"""
Validate this block.
Call the base class validate.
Evaluate the checks: each check must evaluate to True.
Adjust the nports.
"""
_Block.validate(self)
#evaluate the checks
for check in self._checks:
check_res = self.resolve_dependencies(check)
try:
check_eval = self.get_parent().evaluate(check_res)
try: assert check_eval
except AssertionError: self.add_error_message('Check "%s" failed.'%check)
except: self.add_error_message('Check "%s" did not evaluate.'%check)
#adjust nports
for ports, Port in (
(self._sources, self.get_parent().get_parent().Source),
(self._sinks, self.get_parent().get_parent().Sink),
):
#how many ports?
num_ports = len(ports)
#do nothing for 0 ports
if not num_ports: continue
#get the nports setting
port0 = ports[str(0)]
nports = port0.get_nports()
#do nothing for no nports
if not nports: continue
#do nothing if nports is already num ports
if nports == num_ports: continue
#remove excess ports and connections
if nports < num_ports:
#remove the connections
for key in map(str, range(nports, num_ports)):
port = ports[key]
for connection in port.get_connections():
self.get_parent().remove_element(connection)
#remove the ports
for key in map(str, range(nports, num_ports)): ports.pop(key)
continue
#add more ports
if nports > num_ports:
for key in map(str, range(num_ports, nports)):
n = port0._n
n['key'] = key
port = Port(self, n)
ports[key] = port
continue
def port_controller_modify(self, direction):
"""
Change the port controller.
@param direction +1 or -1
@return true for change
"""
changed = False
#concat the nports string from the private nports settings of both port0
nports_str = \
(self.get_sinks() and self.get_sinks()[0]._nports or '') + \
(self.get_sources() and self.get_sources()[0]._nports or '')
#modify all params whose keys appear in the nports string
for param in self.get_params():
if param.is_enum() or param.get_key() not in nports_str: continue
#try to increment the port controller by direction
try:
value = param.get_evaluated()
value = value + direction
assert 0 < value
param.set_value(value)
changed = True
except: pass
return changed
def get_doc(self):
doc = self._doc.strip('\n').replace('\\\n', '')
#merge custom doc with doxygen docs
return '\n'.join([doc, extract_docs.extract(self.get_key())]).strip('\n')
def get_category(self):
category = extract_category.extract(self.get_key())
#if category: return category
return _Block.get_category(self)
def get_imports(self):
"""
Resolve all import statements.
Split each import statement at newlines.
Combine all import statments into a list.
Filter empty imports.
@return a list of import statements
"""
return filter(lambda i: i, sum(map(lambda i: self.resolve_dependencies(i).split('\n'), self._imports), []))
def get_make(self): return self.resolve_dependencies(self._make)
def get_var_make(self): return self.resolve_dependencies(self._var_make)
def get_callbacks(self):
"""
Get a list of function callbacks for this block.
@return a list of strings
"""
def make_callback(callback):
callback = self.resolve_dependencies(callback)
if 'self.' in callback: return callback
return 'self.%s.%s'%(self.get_id(), callback)
return map(make_callback, self._callbacks)
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