atrcopy/test_data/create_binary.py

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#!/usr/bin/env python
"""
"""
import os
import numpy as np
import subprocess
import tempfile
def create_binary(filename, num, outfile, options):
"""Create patterned binary data with the first 7 characters of the filename
interleaved with a byte ramp, e.g. A128 \x00A128 \x01A128 \x02 etc.
"""
root, _ = outfile.split(".")
prefix = ("%s " % root)[0:8]
a = np.fromstring(prefix, dtype=np.uint8)
b = np.tile(a, (num / np.alen(a)) + 1)[0:num]
b[7::8] = np.arange(np.alen(b) / 8, dtype=np.uint8)
with open(filename, "wb") as fh:
fh.write(b.tostring())
def num_to_letter(num):
text = []
while True:
num, rem = divmod(num, 26)
text[0:0] = chr(ord("A") + rem)
if num == 0:
break
return "".join(text)
def get_filename(num, used):
if num not in used:
used[num] = 0
prefix = num_to_letter(used[num])
filename = "%s%d.DAT" % (prefix, num)
used[num] += 1
return filename
def franny(filename, *options):
cmd = ["franny", filename]
cmd.extend(options)
msg = subprocess.Popen(cmd, stdout=subprocess.PIPE).communicate()[0]
if __name__ == "__main__":
import sys
import argparse
parser = argparse.ArgumentParser(description="Extract images off ATR format disks")
parser.add_argument("-v", "--verbose", default=0, action="count")
parser.add_argument("-p", "--prefix", default="B", action="store")
parser.add_argument("-f", "--filesystem", default="a", action="store")
parser.add_argument("-d", "--density", default="s", action="store")
parser.add_argument("-s", "--sectors", default=720, type=int, action="store")
parser.add_argument("-t", "--template", default="", action="store")
parser.add_argument("-o", "--output", default="a.out", action="store")
parser.add_argument("files", metavar="NUM", nargs="+", help="list of numbers specifying the size of each binary file")
options, extra_args = parser.parse_known_args()
out = options.output
if options.template:
franny(out, "-C", "-f", options.filesystem, "-t", options.template)
else:
franny(out, "-C", "-f", options.filesystem, "-d", options.density, "-s", str(options.sectors))
fh, binfile = tempfile.mkstemp()
os.close(fh)
used = {}
files = []
print "Creating image %s" % out
for entry in options.files:
entry = entry.lower()
if entry.startswith("d"):
index = int(entry[1:])
outfile = files[index]
franny(out, "-U", outfile)
else:
if "*" in entry:
repeat, num = entry.split("*", 1)
num = int(num)
repeat = int(repeat)
entries = [num] * repeat
elif "-" in entry:
first, last = entry.split("-", 1)
first = int(first)
if "," in last:
last, step = last.split(",", 1)
step = int(step)
else:
step = 1
last = int(last)
entries = range(first, last + 1, step)
else:
num = int(entry)
entries = [num]
for i in entries:
outfile = get_filename(i, used)
create_binary(binfile, i, outfile, options)
franny(out, "-A", "-i", binfile, "-o", outfile)
files.append(outfile)
os.unlink(binfile)