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import time
import sys
PY_MAJOR_VERSION = sys.version_info[0]
if PY_MAJOR_VERSION > 2:
NULL_CHAR = 0
else:
NULL_CHAR = '\0'
def raise_error(error, message):
# I have to exec() this code because the Python 2 syntax is invalid
# under Python 3 and vice-versa.
s = "raise "
s += "error, message" if (PY_MAJOR_VERSION == 2) else "error(message)"
exec(s)
def say(s):
"""Prints a timestamped, self-identified message"""
who = sys.argv[0]
if who.endswith(".py"):
who = who[:-3]
s = "%s@%1.6f: %s" % (who, time.time(), s)
print (s)
def write_to_memory(mapfile, s):
"""Writes the string s to the mapfile"""
say("writing %s " % s)
mapfile.seek(0)
# I append a trailing NULL in case I'm communicating with a C program.
s += '\0'
if PY_MAJOR_VERSION > 2:
s = s.encode()
mapfile.write(s)
def read_from_memory(mapfile):
"""Reads a string from the mapfile and returns that string"""
mapfile.seek(0)
s = [ ]
c = mapfile.read_byte()
while c != NULL_CHAR:
s.append(c)
c = mapfile.read_byte()
if PY_MAJOR_VERSION > 2:
s = [chr(c) for c in s]
s = ''.join(s)
say("read %s" % s)
return s
def read_params():
"""Reads the contents of params.txt and returns them as a dict"""
params = { }
f = open("params.txt")
for line in f:
line = line.strip()
if line:
if line.startswith('#'):
pass # comment in input, ignore
else:
name, value = line.split('=')
name = name.upper().strip()
if name == "PERMISSIONS":
# Think octal, young man!
value = int(value, 8)
elif "NAME" in name:
# This is a string; leave it alone.
pass
else:
value = int(value)
#print "name = %s, value = %d" % (name, value)
params[name] = value
f.close()
return params
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