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"""
gpscap - GPS capability dictionary class.
"""
import ConfigParser
class GPSDictionary(ConfigParser.RawConfigParser):
def __init__(self, *files):
"Initialize the capability dictionary"
ConfigParser.RawConfigParser.__init__(self)
if not files:
files = ["gpscap.ini", "/usr/share/gpsd/gpscap.ini"]
self.read(files)
# Resolve uses= members
while True:
keepgoing = False
for section in self.sections():
if self.has_option(section, "uses"):
parent = self.get(section, "uses")
if self.has_option(parent, "uses"):
continue
# Found a parent section without a uses = part.
for heritable in self.options(parent):
if not self.has_option(section, heritable):
self.set(section,
heritable,
self.get(parent, heritable))
keepgoing = True
self.remove_option(section, "uses")
if not keepgoing:
break
# Sanity check: All items must have a type field.
for section in self.sections():
if not self.has_option(section, "type"):
raise ConfigParser.Error("%s has no type" % section)
elif self.get(section, "type") not in ("engine", "vendor", "device"):
raise ConfigParser.Error("%s has invalid type" % section)
# Sanity check: All devices must point at a vendor object.
# Side effect: build the list of vendors.
self.vendors = []
for section in self.sections():
if self.get(section, "type") == "vendor":
self.vendors.append(section)
self.vendors.sort()
for section in self.sections():
if self.get(section, "type") == "device":
if not self.has_option(section, "vendor"):
raise ConfigParser.Error("%s has no vendor" % section)
if self.get(section, "vendor") not in self.vendors:
raise ConfigParser.Error("%s has invalid vendor" % section)
if __name__ == "__main__":
d = GPSDictionary()
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