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"""
Utilities for creating dot output from a MachOGraph
"""
from collections import deque
try:
from itertools import imap
except ImportError:
imap = map
__all__ = ["itergraphreport"]
def itergraphreport(nodes, describe_edge, name="G"):
edges = deque()
nodetoident = {}
def nodevisitor(node, data, outgoing, incoming):
return {"label": str(node)}
def edgevisitor(edge, data, head, tail):
return {}
yield "digraph %s {\n" % (name,)
attr = {"rankdir": "LR", "concentrate": "true"}
cpatt = '%s="%s"'
for item in attr.items():
yield "\t%s;\n" % (cpatt % item,)
# find all packages (subgraphs)
for node, data, _outgoing, _incoming in nodes:
nodetoident[node] = getattr(data, "identifier", node)
# create sets for subgraph, write out descriptions
for node, data, outgoing, incoming in nodes:
# update edges
for edge in imap(describe_edge, outgoing):
edges.append(edge)
# describe node
yield '\t"%s" [%s];\n' % (
node,
",".join(
[
(cpatt % item)
for item in nodevisitor(node, data, outgoing, incoming).items()
]
),
)
graph = []
while edges:
edge, data, head, tail = edges.popleft()
if data in ("run_file", "load_dylib"):
graph.append((edge, data, head, tail))
def do_graph(edges, tabs):
edgestr = tabs + '"%s" -> "%s" [%s];\n'
# describe edge
for edge, data, head, tail in edges:
attribs = edgevisitor(edge, data, head, tail)
yield edgestr % (
head,
tail,
",".join([(cpatt % item) for item in attribs.items()]),
)
for s in do_graph(graph, "\t"):
yield s
yield "}\n"
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