Add third_party/pexpect

third_party/pexpect/examples/chess2.py

Index: third_party/pexpect/examples/chess2.py
diff --git a/third_party/pexpect/examples/chess2.py b/third_party/pexpect/examples/chess2.py
new file mode 100644
index 0000000000000000000000000000000000000000..b92509e776f477e879120576bbe86fd0b2ac0b5a
--- /dev/null
+++ b/third_party/pexpect/examples/chess2.py
@@ -0,0 +1,153 @@
+#!/usr/bin/env python
+
+'''This demonstrates controlling a screen oriented application (curses).
+It starts two instances of gnuchess and then pits them against each other.
+
+PEXPECT LICENSE
+
+    This license is approved by the OSI and FSF as GPL-compatible.
+        http://opensource.org/licenses/isc-license.txt
+
+    Copyright (c) 2012, Noah Spurrier <noah@noah.org>
+    PERMISSION TO USE, COPY, MODIFY, AND/OR DISTRIBUTE THIS SOFTWARE FOR ANY
+    PURPOSE WITH OR WITHOUT FEE IS HEREBY GRANTED, PROVIDED THAT THE ABOVE
+    COPYRIGHT NOTICE AND THIS PERMISSION NOTICE APPEAR IN ALL COPIES.
+    THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+    WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+    MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+    ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+    WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+    ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+    OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+
+'''
+
+from __future__ import print_function
+
+from __future__ import absolute_import
+
+import pexpect
+import ANSI
+import sys
+import time
+
+class Chess:
+
+        def __init__(self, engine = "/usr/local/bin/gnuchess -a -h 1"):
+                self.child = pexpect.spawn (engine)
+                self.term = ANSI.ANSI ()
+
+                #self.child.expect ('Chess')
+                #if self.child.after != 'Chess':
+                #        raise IOError, 'incompatible chess program'
+                #self.term.process_list (self.child.before)
+                #self.term.process_list (self.child.after)
+
+                self.last_computer_move = ''
+
+        def read_until_cursor (self, r,c, e=0):
+            '''Eventually something like this should move into the screen class or
+            a subclass. Maybe a combination of pexpect and screen...
+            '''
+            fout = open ('log','a')
+            while self.term.cur_r != r or self.term.cur_c != c:
+                try:
+                    k = self.child.read(1, 10)
+                except Exception as e:
+                    print('EXCEPTION, (r,c):(%d,%d)\n' %(self.term.cur_r, self.term.cur_c))
+                    sys.stdout.flush()
+                self.term.process (k)
+                fout.write ('(r,c):(%d,%d)\n' %(self.term.cur_r, self.term.cur_c))
+                fout.flush()
+                if e:
+                    sys.stdout.write (k)
+                    sys.stdout.flush()
+                if self.term.cur_r == r and self.term.cur_c == c:
+                    fout.close()
+                    return 1
+            print('DIDNT EVEN HIT.')
+            fout.close()
+            return 1
+
+        def expect_region (self):
+            '''This is another method that would be moved into the
+            screen class.
+            '''
+            pass
+        def do_scan (self):
+            fout = open ('log','a')
+            while 1:
+                c = self.child.read(1,10)
+                self.term.process (c)
+                fout.write ('(r,c):(%d,%d)\n' %(self.term.cur_r, self.term.cur_c))
+                fout.flush()
+                sys.stdout.write (c)
+                sys.stdout.flush()
+
+        def do_move (self, move, e = 0):
+                time.sleep(1)
+                self.read_until_cursor (19,60, e)
+                self.child.sendline (move)
+
+        def wait (self, color):
+            while 1:
+                r = self.term.get_region (14,50,14,60)[0]
+                r = r.strip()
+                if r == color:
+                    return
+                time.sleep (1)
+
+        def parse_computer_move (self, s):
+                i = s.find ('is: ')
+                cm = s[i+3:i+9]
+                return cm
+        def get_computer_move (self, e = 0):
+                time.sleep(1)
+                self.read_until_cursor (19,60, e)
+                time.sleep(1)
+                r = self.term.get_region (17,50,17,62)[0]
+                cm = self.parse_computer_move (r)
+                return cm
+
+        def switch (self):
+                print('switching')
+                self.child.sendline ('switch')
+
+        def set_depth (self, depth):
+                self.child.sendline ('depth')
+                self.child.expect ('depth=')
+                self.child.sendline ('%d' % depth)
+
+        def quit(self):
+                self.child.sendline ('quit')
+
+def LOG (s):
+    print(s)
+    sys.stdout.flush ()
+    fout = open ('moves.log', 'a')
+    fout.write (s + '\n')
+    fout.close()
+
+print('Starting...')
+
+black = Chess()
+white = Chess()
+white.read_until_cursor (19,60,1)
+white.switch()
+
+done = 0
+while not done:
+    white.wait ('Black')
+    move_white = white.get_computer_move(1)
+    LOG ( 'move white:'+ move_white )
+
+    black.do_move (move_white)
+    black.wait ('White')
+    move_black = black.get_computer_move()
+    LOG ( 'move black:'+ move_black )
+
+    white.do_move (move_black, 1)
+
+g.quit()
+
+