2 Copyright 2008 Free Software Foundation, Inc.
3 This file is part of GNU Radio
5 GNU Radio Companion is free software; you can redistribute it and/or
6 modify it under the terms of the GNU General Public License
7 as published by the Free Software Foundation; either version 2
8 of the License, or (at your option) any later version.
10 GNU Radio Companion is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
22 from Cheetah.Template import Template
23 from utils import expr_utils
24 from Constants import \
25 TOP_BLOCK_FILE_MODE, HIER_BLOCK_FILE_MODE, \
26 HIER_BLOCKS_LIB_DIR, PYEXEC, \
28 from utils import convert_hier
30 class Generator(object):
32 def __init__(self, flow_graph, file_path):
34 Initialize the generator object.
35 Determine the file to generate.
36 @param flow_graph the flow graph object
37 @param file_path the path to write the file to
39 self._flow_graph = flow_graph
40 self._generate_options = self._flow_graph.get_option('generate_options')
41 if self._generate_options == 'hb':
42 self._mode = HIER_BLOCK_FILE_MODE
43 dirname = HIER_BLOCKS_LIB_DIR
45 self._mode = TOP_BLOCK_FILE_MODE
46 dirname = os.path.dirname(file_path)
47 filename = self._flow_graph.get_option('id') + '.py'
48 self._file_path = os.path.join(dirname, filename)
50 def get_file_path(self): return self._file_path
54 open(self.get_file_path(), 'w').write(str(self))
55 if self._generate_options == 'hb':
56 #convert hier block to xml wrapper
57 convert_hier.convert_hier(self._flow_graph, self.get_file_path())
58 os.chmod(self.get_file_path(), self._mode)
62 Execute this python flow graph.
63 @return a popen object
66 cmds = [PYEXEC, self.get_file_path()]
67 if self._generate_options == 'no_gui':
68 cmds = ['xterm', '-e'] + cmds
69 p = subprocess.Popen(args=cmds, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, shell=False, universal_newlines=True)
74 Convert the flow graph to python code.
75 @return a string of python code
77 imports = self._flow_graph.get_imports()
78 variables = self._flow_graph.get_variables()
79 parameters = self._flow_graph.get_parameters()
80 #list of variables with controls
81 controls = filter(lambda v: v.get_key().startswith('variable_'), variables)
82 #list of blocks not including variables and imports and parameters and disabled
83 blocks = sorted(self._flow_graph.get_enabled_blocks(), lambda x, y: cmp(x.get_id(), y.get_id()))
84 blocks = filter(lambda b: b not in (imports + parameters + variables), blocks)
85 #list of connections where each endpoint is enabled
86 connections = self._flow_graph.get_enabled_connections()
87 #list of variable names
88 var_ids = [var.get_id() for var in parameters + variables]
89 #list of callbacks (prepend self.)
91 expr_utils.expr_prepend(cb, var_ids, 'self.')
92 for cb in sum([block.get_callbacks() for block in self._flow_graph.get_blocks()], [])
94 #map var id to the expression (prepend self.)
96 [(var.get_id(), expr_utils.expr_prepend(var.get_make().split('\n')[0], var_ids, 'self.'))
97 for var in parameters + variables]
99 #create graph structure for variables
100 variable_graph = expr_utils.get_graph(var_id2expr)
101 #map var id to direct dependents
102 #for each var id, make a list of all 2nd order edges
103 #use all edges of that id that are not also 2nd order edges
104 #meaning: list variables the ONLY depend directly on this variable
105 #and not variables that also depend indirectly on this variable
107 [(var_id, filter(lambda e: e not in sum([list(variable_graph.get_edges(edge))
108 for edge in variable_graph.get_edges(var_id)], []), variable_graph.get_edges(var_id)
111 for var_id in var_ids]
113 #map var id to callbacks
115 [(var_id, filter(lambda c: var_id in expr_utils.expr_split(c), callbacks))
116 for var_id in var_ids]
121 'flow_graph': self._flow_graph,
122 'variables': variables,
123 'controls': controls,
124 'parameters': parameters,
126 'connections': connections,
127 'generate_options': self._generate_options,
128 'var_id2expr': var_id2expr,
129 'var_id2deps': var_id2deps,
130 'var_id2cbs': var_id2cbs,
133 t = Template(open(FLOW_GRAPH_TEMPLATE, 'r').read(), namespace)