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Greatly flesh out the cbl reader

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This commit is contained in:
Jarrod Johnson 2019-03-29 16:01:40 -04:00
parent 2c8681a9f3
commit e0c0f0f1f3
1 changed files with 69 additions and 8 deletions
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77
misc/cblreader.py
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@ -1,23 +1,84 @@
import os
import struct
import sys
import time
import fcntl
import select
import termios
import tty
def writeout(data):
done = False
while not done:
try:
sys.stdout.write(data)
done = True
except IOError:
pass
def main(binfile, txtfile):
binf = open(binfile, 'r')
txtf = open(txtfile, 'r')
record = binf.read(16)
oldtcattr = termios.tcgetattr(sys.stdin.fileno())
tty.setraw(sys.stdin.fileno())
currfl = fcntl.fcntl(sys.stdin.fileno(), fcntl.F_GETFL)
fcntl.fcntl(sys.stdin.fileno(), fcntl.F_SETFL, currfl | os.O_NONBLOCK)
recordcount = 1
while record:
showrecords(record, txtf, binf, recordcount)
recordcount = 1
select.select((sys.stdin,), (), (), 86400)
myinput = sys.stdin.read()
if myinput == '\x1b[C': # right
record = binf.read(16)
elif myinput == '\x1b[D': # left
sys.stdout.write('\x1b[2J\x1b[;H')
numrecords = 0
prevoffset = 1
while numrecords < 16 and prevoffset > 0:
prevoffset = binf.tell() - 32
if prevoffset < 0:
prevoffset = 0
binf.seek(prevoffset)
record = binf.read(16)
while record[1] != '\x02' and prevoffset > 0:
prevoffset = binf.tell() - 32
if prevoffset < 0:
prevoffset = 0
binf.seek(prevoffset)
record = binf.read(16)
if record[1] == '\x02':
numrecords += 1
recordcount = numrecords
elif myinput.lower() == 'q':
break
else:
record = binf.read(16)
currfl = fcntl.fcntl(sys.stdin.fileno(), fcntl.F_GETFL)
fcntl.fcntl(sys.stdin.fileno(), fcntl.F_SETFL, currfl ^ os.O_NONBLOCK)
termios.tcsetattr(sys.stdin.fileno(), termios.TCSANOW, oldtcattr)
sys.stdout.write('\x1b[m')
def showrecords(record, txtf, binf, recordcount):
while record and recordcount:
recs = struct.unpack('!BBIHIBBH', record)
offset = recs[2]
size = recs[3]
tstamp = recs[4]
tstamp = time.strftime('%m/%d %H:%M:%S ', time.localtime(tstamp))
txtf.seek(offset)
currdata = txtf.read(size)
sys.stdout.write(currdata)
sys.stdout.write('\x1b]0;{0}\x07'.format(tstamp))
sys.stdout.flush()
raw_input()
record = binf.read(16)
if recs[1] == 2:
tstamp = time.strftime('%m/%d %H:%M:%S ', time.localtime(tstamp))
txtf.seek(offset)
currdata = txtf.read(size)
sys.stdout.write(currdata)
sys.stdout.write('\x1b]0;{0}\x07'.format(tstamp))
sys.stdout.flush()
recordcount -= 1
if recordcount:
record = binf.read(16)
else:
record = binf.read(16)