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"""
GameConquerorBackend: communication with scanmem
Copyright (C) 2010,2011,2013 Wang Lu <coolwanglu(a)gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
import sys
import os
import ctypes
import tempfile
import misc
class GameConquerorBackend():
BACKEND_FUNCS = {
'sm_init' : (ctypes.c_bool, ),
'sm_cleanup' : (None, ),
'sm_set_backend' : (None, ),
'sm_backend_exec_cmd' : (None, ctypes.c_char_p),
'sm_get_num_matches' : (ctypes.c_ulong, ),
'sm_get_version' : (ctypes.c_char_p, ),
'sm_get_scan_progress' : (ctypes.c_double, ),
'sm_set_stop_flag' : (ctypes.c_bool, )
}
def __init__(self, libpath='libscanmem.so'):
self.lib = ctypes.CDLL(libpath)
self.init_lib_functions()
self.lib.sm_set_backend()
self.lib.sm_init()
self.send_command('reset')
self.version = ''
def init_lib_functions(self):
for k,v in GameConquerorBackend.BACKEND_FUNCS.items():
f = getattr(self.lib, k)
f.restype = v[0]
f.argtypes = v[1:]
# `get_output` will return in a string what libscanmem would print to stdout
def send_command(self, cmd, get_output = False):
if get_output:
with tempfile.TemporaryFile() as directed_file:
backup_stdout_fileno = os.dup(sys.stdout.fileno())
os.dup2(directed_file.fileno(), sys.stdout.fileno())
self.lib.sm_backend_exec_cmd(ctypes.c_char_p(misc.encode(cmd)))
os.dup2(backup_stdout_fileno, sys.stdout.fileno())
os.close(backup_stdout_fileno)
directed_file.seek(0)
return directed_file.read()
else:
self.lib.sm_backend_exec_cmd(ctypes.c_char_p(misc.encode(cmd)))
def get_match_count(self):
return self.lib.sm_get_num_matches()
def get_version(self):
return misc.decode(self.lib.sm_get_version())
def get_scan_progress(self):
return self.lib.sm_get_scan_progress()
def set_stop_flag(self, stop_flag):
self.lib.sm_set_stop_flag(stop_flag)
def exit_cleanup(self):
self.lib.sm_cleanup()
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