Initial revision
diff --git a/Demo/threads/README b/Demo/threads/README
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+++ b/Demo/threads/README
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+This directory contains some demonstrations of the thread module.
+They are mostly "proof of concept" type applications:
+
+telnet.py Version of ../sockets/telnet.py using threads.
+wpi.py Version of ../scripts/pi.py using threads and stdwin.
diff --git a/Demo/threads/telnet.py b/Demo/threads/telnet.py
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+++ b/Demo/threads/telnet.py
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+# Minimal interface to the Internet telnet protocol.
+#
+# *** modified to use threads ***
+#
+# It refuses all telnet options and does not recognize any of the other
+# telnet commands, but can still be used to connect in line-by-line mode.
+# It's also useful to play with a number of other services,
+# like time, finger, smtp and even ftp.
+#
+# Usage: telnet host [port]
+#
+# The port may be a service name or a decimal port number;
+# it defaults to 'telnet'.
+
+
+import sys, os, time
+from socket import *
+import thread
+
+BUFSIZE = 8*1024
+
+# Telnet protocol characters
+
+IAC = chr(255) # Interpret as command
+DONT = chr(254)
+DO = chr(253)
+WONT = chr(252)
+WILL = chr(251)
+
+def main():
+ host = sys.argv[1]
+ try:
+ hostaddr = gethostbyname(host)
+ except error:
+ sys.stderr.write(sys.argv[1] + ': bad host name\n')
+ sys.exit(2)
+ #
+ if len(sys.argv) > 2:
+ servname = sys.argv[2]
+ else:
+ servname = 'telnet'
+ #
+ if '0' <= servname[:1] <= '9':
+ port = eval(servname)
+ else:
+ try:
+ port = getservbyname(servname, 'tcp')
+ except error:
+ sys.stderr.write(servname + ': bad tcp service name\n')
+ sys.exit(2)
+ #
+ s = socket(AF_INET, SOCK_STREAM)
+ #
+ try:
+ s.connect(host, port)
+ except error, msg:
+ sys.stderr.write('connect failed: ' + `msg` + '\n')
+ sys.exit(1)
+ #
+ thread.start_new(child, (s,))
+ parent(s)
+
+def parent(s):
+ # read socket, write stdout
+ iac = 0 # Interpret next char as command
+ opt = '' # Interpret next char as option
+ while 1:
+ data, dummy = s.recvfrom(BUFSIZE)
+ if not data:
+ # EOF -- exit
+ sys.stderr.write( '(Closed by remote host)\n')
+ thread.exit_prog(1)
+ cleandata = ''
+ for c in data:
+ if opt:
+ print ord(c)
+ print '(replying: ' + `opt+c` + ')'
+ s.send(opt + c)
+ opt = ''
+ elif iac:
+ iac = 0
+ if c == IAC:
+ cleandata = cleandata + c
+ elif c in (DO, DONT):
+ if c == DO: print '(DO)',
+ else: print '(DONT)',
+ opt = IAC + WONT
+ elif c in (WILL, WONT):
+ if c == WILL: print '(WILL)',
+ else: print '(WONT)',
+ opt = IAC + DONT
+ else:
+ print '(command)', ord(c)
+ elif c == IAC:
+ iac = 1
+ print '(IAC)',
+ else:
+ cleandata = cleandata + c
+ sys.stdout.write(cleandata)
+ sys.stdout.flush()
+## print 'Out:', `cleandata`
+
+def child(s):
+ # read stdin, write socket
+ while 1:
+ line = sys.stdin.readline()
+## print 'Got:', `line`
+ s.send(line)
+
+main()
diff --git a/Demo/threads/wpi.py b/Demo/threads/wpi.py
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+++ b/Demo/threads/wpi.py
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+# Display digits of pi in a window, calculating in a separate thread.
+# Compare ../scripts/pi.py.
+
+import time
+import thread
+import stdwin
+from stdwinevents import *
+
+digits = []
+
+def worker():
+ k, a, b, a1, b1 = 2l, 4l, 1l, 12l, 4l
+ while 1:
+ # Next approximation
+ p, q, k = k*k, 2l*k+1l, k+1l
+ a, b, a1, b1 = a1, b1, p*a+q*a1, p*b+q*b1
+ # Print common digits
+ d, d1 = a/b, a1/b1
+ #print a, b, a1, b1
+ while d == d1:
+ digits.append(`int(d)`)
+ a, a1 = 10l*(a%b), 10l*(a1%b1)
+ d, d1 = a/b, a1/b1
+
+def main():
+ digits_seen = 0
+ thread.start_new_thread(worker, ())
+ tw = stdwin.textwidth('0 ')
+ lh = stdwin.lineheight()
+ stdwin.setdefwinsize(20 * tw, 20 * lh)
+ win = stdwin.open('digits of pi')
+ options = win.menucreate('Options')
+ options.additem('Auto scroll')
+ autoscroll = 1
+ options.check(0, autoscroll)
+ while 1:
+ win.settimer(1)
+ type, w, detail = stdwin.getevent()
+ if type == WE_CLOSE:
+ thread.exit_prog(0)
+ elif type == WE_DRAW:
+ (left, top), (right, bottom) = detail
+ digits_seen = len(digits)
+ d = win.begindrawing()
+ for i in range(digits_seen):
+ h = (i % 20) * tw
+ v = (i / 20) * lh
+ if top-lh < v < bottom:
+ d.text((h, v), digits[i])
+ d.close()
+ elif type == WE_TIMER:
+ n = len(digits)
+ if n > digits_seen:
+ win.settitle(`n` + ' digits of pi')
+ d = win.begindrawing()
+ for i in range(digits_seen, n):
+ h = (i % 20) * tw
+ v = (i / 20) * lh
+ d.text((h, v), digits[i])
+ d.close()
+ digits_seen = n
+ height = (v + 20*lh) / (20*lh) * (20*lh)
+ win.setdocsize(0, height)
+ if autoscroll:
+ win.show((0, v), (h+tw, v+lh))
+ elif type == WE_MENU:
+ menu, item = detail
+ if menu == options:
+ if item == 0:
+ autoscroll = (not autoscroll)
+ options.check(0, autoscroll)
+
+
+main()