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21
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1 #! /usr/bin/env python
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16
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2 # Copyright (c) 2010 Chortos-2 <chortos@inbox.lv>
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3
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21
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4 from __future__ import division, with_statement
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5
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6 try:
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7 from compat import *
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8 import files, problem, config
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9 except ImportError:
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10 import __main__
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11 __main__.import_error(sys.exc_info()[1])
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12 else:
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13 from __main__ import clock, options
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14
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15 import glob, re, sys, tempfile, time
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16 from subprocess import Popen, PIPE, STDOUT
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17
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18 import os
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19 devnull = open(os.path.devnull, 'w+')
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20
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21 try:
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22 from signal import SIGTERM, SIGKILL
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23 except ImportError:
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24 SIGTERM = 15
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25 SIGKILL = 9
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26
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16
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27 try:
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21
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28 from _subprocess import TerminateProcess
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29 except ImportError:
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30 # CPython 2.5 does define _subprocess.TerminateProcess even though it is
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31 # not used in the subprocess module, but maybe something else does not
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32 try:
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33 import ctypes
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34 TerminateProcess = ctypes.windll.kernel32.TerminateProcess
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35 except (ImportError, AttributeError):
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36 TerminateProcess = None
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37
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22
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38
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39 # Do the hacky-wacky dark magic needed to catch presses of the Escape button.
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40 # If only Python supported forcible termination of threads...
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41 if not sys.stdin.isatty():
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42 canceled = init_canceled = lambda: False
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43 pause = None
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44 else:
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45 try:
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46 # Windows has select() too, but it is not the select() we want
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47 import msvcrt
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48 except ImportError:
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49 try:
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50 import select, termios, tty, atexit
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51 except ImportError:
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52 # It cannot be helped!
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53 # Silently disable support for killing the program being tested
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54 canceled = init_canceled = lambda: False
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55 pause = None
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56 else:
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57 def cleanup(old=termios.tcgetattr(sys.stdin.fileno())):
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58 termios.tcsetattr(sys.stdin.fileno(), termios.TCSAFLUSH, old)
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59 atexit.register(cleanup)
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60 del cleanup
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61 tty.setcbreak(sys.stdin.fileno())
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62 def canceled():
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63 while select.select((sys.stdin,), (), (), 0)[0]:
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64 if sys.stdin.read(1) == '\33':
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65 return True
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66 return False
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67 def init_canceled():
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68 while select.select((sys.stdin,), (), (), 0)[0]:
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69 sys.stdin.read(1)
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70 def pause():
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71 sys.stdin.read(1)
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72 else:
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73 def canceled():
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74 while msvcrt.kbhit():
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75 c = msvcrt.getch()
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76 if c == '\33':
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77 return True
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78 elif c == '\0':
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79 # Let's hope no-one is fiddling with this
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80 msvcrt.getch()
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81 return False
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82 def init_canceled():
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83 while msvcrt.kbhit():
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84 msvcrt.getch()
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85 def pause():
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86 msvcrt.getch()
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87
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88
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21
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89 __all__ = ('TestCase', 'load_problem', 'TestCaseNotPassed',
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22
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90 'TimeLimitExceeded', 'CanceledByUser', 'WrongAnswer',
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91 'NonZeroExitCode', 'CannotStartTestee',
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92 'CannotStartValidator', 'CannotReadOutputFile',
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93 'CannotReadInputFile', 'CannotReadAnswerFile')
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21
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94
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95
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96
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97 # Exceptions
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98
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99 class TestCaseNotPassed(Exception): __slots__ = ()
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100 class TimeLimitExceeded(TestCaseNotPassed): __slots__ = ()
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22
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101 class CanceledByUser(TestCaseNotPassed): __slots__ = ()
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21
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102
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103 class WrongAnswer(TestCaseNotPassed):
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104 __slots__ = 'comment'
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105 def __init__(self, comment=''):
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106 self.comment = comment
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107
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108 class NonZeroExitCode(TestCaseNotPassed):
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109 __slots__ = 'exitcode'
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110 def __init__(self, exitcode):
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111 self.exitcode = exitcode
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112
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113 class ExceptionWrapper(TestCaseNotPassed):
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114 __slots__ = 'upstream'
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115 def __init__(self, upstream):
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116 self.upstream = upstream
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117
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118 class CannotStartTestee(ExceptionWrapper): __slots__ = ()
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119 class CannotStartValidator(ExceptionWrapper): __slots__ = ()
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120 class CannotReadOutputFile(ExceptionWrapper): __slots__ = ()
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121 class CannotReadInputFile(ExceptionWrapper): __slots__ = ()
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122 class CannotReadAnswerFile(ExceptionWrapper): __slots__ = ()
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123
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124
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125
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22
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126 # Helper context managers
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127
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128 class CopyDeleting(object):
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129 __slots__ = 'case', 'file', 'name'
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130
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131 def __init__(self, case, file, name):
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132 self.case = case
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133 self.file = file
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134 self.name = name
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135
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136 def __enter__(self):
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137 if self.name:
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138 try:
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139 self.file.copy(self.name)
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140 except:
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141 try:
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142 self.__exit__(None, None, None)
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143 except:
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144 pass
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145 raise
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146
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147 def __exit__(self, exc_type, exc_val, exc_tb):
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148 if self.name:
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149 self.case.files_to_delete.append(self.name)
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150
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151
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152 class Copying(object):
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153 __slots__ = 'file', 'name'
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154
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155 def __init__(self, file, name):
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156 self.file = file
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157 self.name = name
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158
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159 def __enter__(self):
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160 if self.name:
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161 self.file.copy(self.name)
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162
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163 def __exit__(self, exc_type, exc_val, exc_tb):
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164 pass
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165
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166
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167
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21
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168 # Test case types
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169
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170 class TestCase(object):
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171 __slots__ = ('problem', 'id', 'isdummy', 'infile', 'outfile', 'points',
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172 'process', 'time_started', 'time_stopped', 'time_limit_string',
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22
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173 'realinname', 'realoutname', 'maxtime', 'maxmemory',
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174 'has_called_back', 'files_to_delete')
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21
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175
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176 if ABCMeta:
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177 __metaclass__ = ABCMeta
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178
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21
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179 def __init__(case, prob, id, isdummy, points):
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180 case.problem = prob
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181 case.id = id
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182 case.isdummy = isdummy
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183 case.points = points
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184 case.maxtime = case.problem.config.maxtime
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185 case.maxmemory = case.problem.config.maxmemory
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186 if case.maxtime:
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187 case.time_limit_string = '/%.3f' % case.maxtime
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188 else:
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189 case.time_limit_string = ''
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190 if not isdummy:
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191 case.realinname = case.problem.config.testcaseinname
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192 case.realoutname = case.problem.config.testcaseoutname
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193 else:
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194 case.realinname = case.problem.config.dummyinname
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195 case.realoutname = case.problem.config.dummyoutname
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196
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197 @abstractmethod
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198 def test(case): raise NotImplementedError
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199
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22
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200 def __call__(case, callback):
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201 case.has_called_back = False
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202 case.files_to_delete = []
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21
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203 try:
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204 return case.test(callback)
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205 finally:
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22
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206 now = clock()
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207 if not getattr(case, 'time_started', None):
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208 case.time_started = case.time_stopped = now
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209 elif not getattr(case, 'time_stopped', None):
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210 case.time_stopped = now
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211 if not case.has_called_back:
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212 callback()
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213 case.cleanup()
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214
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215 def cleanup(case):
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216 #if getattr(case, 'infile', None):
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217 # case.infile.close()
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218 #if getattr(case, 'outfile', None):
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219 # case.outfile.close()
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220 if getattr(case, 'process', None):
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221 # Try killing after three unsuccessful TERM attempts in a row
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222 # (except on Windows, where TERMing is killing)
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223 for i in range(3):
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224 try:
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225 try:
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226 case.process.terminate()
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227 except AttributeError:
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228 # Python 2.5
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229 if TerminateProcess and hasattr(proc, '_handle'):
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230 # Windows API
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231 TerminateProcess(proc._handle, 1)
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232 else:
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233 # POSIX
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234 os.kill(proc.pid, SIGTERM)
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235 except Exception:
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236 time.sleep(0)
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237 case.process.poll()
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238 else:
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22
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239 case.process.wait()
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21
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240 break
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241 else:
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242 # If killing the process is unsuccessful three times in a row,
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243 # just silently stop trying
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244 for i in range(3):
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245 try:
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246 try:
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247 case.process.kill()
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248 except AttributeError:
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249 # Python 2.5
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250 if TerminateProcess and hasattr(proc, '_handle'):
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251 # Windows API
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252 TerminateProcess(proc._handle, 1)
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253 else:
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254 # POSIX
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255 os.kill(proc.pid, SIGKILL)
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256 except Exception:
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257 time.sleep(0)
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258 case.process.poll()
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259 else:
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22
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260 case.process.wait()
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21
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261 break
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22
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262 if case.files_to_delete:
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263 for name in case.files_to_delete:
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264 try:
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265 os.remove(name)
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266 except Exception:
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267 # It can't be helped
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268 pass
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21
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269
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270 def open_infile(case):
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271 try:
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272 case.infile = files.File('/'.join((case.problem.name, case.realinname.replace('$', case.id))))
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273 except IOError:
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274 e = sys.exc_info()[1]
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275 raise CannotReadInputFile(e)
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276
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277 def open_outfile(case):
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278 try:
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279 case.outfile = files.File('/'.join((case.problem.name, case.realoutname.replace('$', case.id))))
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280 except IOError:
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281 e = sys.exc_info()[1]
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282 raise CannotReadAnswerFile(e)
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283
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16
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284
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21
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285 class ValidatedTestCase(TestCase):
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286 __slots__ = 'validator'
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287
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288 def __init__(case, *args):
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289 TestCase.__init__(case, *args)
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290 if not case.problem.config.tester:
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291 case.validator = None
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292 else:
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293 case.validator = case.problem.config.tester
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294
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295 # TODO
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296 def validate(case, output):
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297 if not case.validator:
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298 # Compare the output with the reference output
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299 case.open_outfile()
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300 with case.outfile.open() as refoutput:
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301 for line, refline in zip(output, refoutput):
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302 if not isinstance(refline, basestring):
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303 line = bytes(line, sys.getdefaultencoding())
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304 if line != refline:
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22
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305 raise WrongAnswer
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21
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306 try:
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307 try:
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308 next(output)
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309 except NameError:
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310 output.next()
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311 except StopIteration:
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312 pass
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313 else:
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22
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314 raise WrongAnswer
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21
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315 try:
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316 try:
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317 next(refoutput)
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318 except NameError:
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319 refoutput.next()
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320 except StopIteration:
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321 pass
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322 else:
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22
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323 raise WrongAnswer
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21
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324 return case.points
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325 elif callable(case.validator):
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326 return case.validator(output)
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327 else:
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328 # Call the validator program
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329 output.close()
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23
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330 if case.problem.config.ansname:
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331 case.open_outfile()
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332 case.outfile.copy(case.problem.config.ansname)
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333 case.process = Popen(case.validator, stdin=devnull, stdout=PIPE, stderr=STDOUT, universal_newlines=True, bufsize=-1)
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334 comment = case.process.communicate()[0].strip()
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335 lower = comment.lower()
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336 match = re.match(r'(ok|correct|wrong(?:(?:\s|_)*answer)?)(?:$|\s+|[.,!:]+\s*)', lower)
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337 if match:
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338 comment = comment[match.end():]
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339 if not case.problem.config.maxexitcode:
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340 if case.process.returncode:
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341 raise WrongAnswer(comment)
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342 else:
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343 return case.points, comment
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344 else:
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345 return case.points * case.process.returncode / case.problem.config.maxexitcode, comment
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346
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347
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348 class BatchTestCase(ValidatedTestCase):
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349 __slots__ = ()
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350
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22
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351 def test(case, callback):
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352 init_canceled()
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21
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353 if sys.platform == 'win32' or not case.maxmemory:
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354 preexec_fn = None
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355 else:
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356 def preexec_fn():
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357 try:
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358 import resource
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359 maxmemory = int(case.maxmemory * 1048576)
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360 resource.setrlimit(resource.RLIMIT_AS, (maxmemory, maxmemory))
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361 # I would also set a CPU time limit but I do not want the time
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362 # that passes between the calls to fork and exec to be counted in
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363 except MemoryError:
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364 # We do not have enough memory for ourselves;
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365 # let the parent know about this
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366 raise
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367 except Exception:
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368 # Well, at least we tried
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369 pass
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370 case.open_infile()
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371 case.time_started = None
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372 if case.problem.config.stdio:
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373 if options.erase and not case.validator:
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22
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374 # TODO: re-use the same file name if possible
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21
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375 # FIXME: 2.5 lacks the delete parameter
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376 with tempfile.NamedTemporaryFile(delete=False) as f:
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22
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377 inputdatafname = f.name
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378 context = CopyDeleting(case, case.infile, inputdatafname)
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21
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379 else:
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380 inputdatafname = case.problem.config.inname
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22
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381 context = Copying(case.infile, inputdatafname)
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382 with context:
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383 with open(inputdatafname, 'rU') as infile:
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384 with tempfile.TemporaryFile('w+') if options.erase and not case.validator else open(case.problem.config.outname, 'w+') as outfile:
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23
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385 # TODO: make sure outfile.file is passed to Popen if needed
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21
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386 try:
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22
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387 try:
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388 case.process = Popen(case.problem.config.path, stdin=infile, stdout=outfile, stderr=devnull, universal_newlines=True, bufsize=-1, preexec_fn=preexec_fn)
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389 except MemoryError:
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390 # If there is not enough memory for the forked test.py,
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391 # opt for silent dropping of the limit
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392 case.process = Popen(case.problem.config.path, stdin=infile, stdout=outfile, stderr=devnull, universal_newlines=True, bufsize=-1)
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393 except OSError:
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394 raise CannotStartTestee(sys.exc_info()[1])
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395 case.time_started = clock()
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396 if not case.maxtime:
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397 while True:
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398 exitcode, now = case.process.poll(), clock()
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399 if exitcode is not None:
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400 case.time_stopped = now
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401 break
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402 elif canceled():
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403 raise CanceledByUser
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404 else:
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405 time_end = case.time_started + case.maxtime
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406 while True:
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407 exitcode, now = case.process.poll(), clock()
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408 if exitcode is not None:
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409 case.time_stopped = now
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410 break
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411 elif now >= time_end:
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412 raise TimeLimitExceeded
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413 elif canceled():
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414 raise CanceledByUser
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415 if config.globalconf.force_zero_exitcode and case.process.returncode:
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416 raise NonZeroExitCode(case.process.returncode)
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417 callback()
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418 case.has_called_back = True
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419 outfile.seek(0)
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420 return case.validate(outfile)
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21
|
421 else:
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22
|
422 case.infile.copy(case.problem.config.inname)
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21
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423 try:
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424 try:
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425 case.process = Popen(case.problem.config.path, stdin=devnull, stdout=devnull, stderr=STDOUT, preexec_fn=preexec_fn)
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|
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426 except MemoryError:
|
|
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427 # If there is not enough memory for the forked test.py,
|
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428 # opt for silent dropping of the limit
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429 case.process = Popen(case.problem.config.path, stdin=devnull, stdout=devnull, stderr=STDOUT)
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430 except OSError:
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|
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431 raise CannotStartTestee(sys.exc_info()[1])
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|
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432 case.time_started = clock()
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|
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433 if not case.maxtime:
|
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22
|
434 while True:
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|
|
435 exitcode, now = case.process.poll(), clock()
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|
|
436 if exitcode is not None:
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|
|
437 case.time_stopped = now
|
|
|
438 break
|
|
|
439 elif canceled():
|
|
|
440 raise CanceledByUser
|
|
21
|
441 else:
|
|
|
442 time_end = case.time_started + case.maxtime
|
|
|
443 while True:
|
|
22
|
444 exitcode, now = case.process.poll(), clock()
|
|
21
|
445 if exitcode is not None:
|
|
|
446 case.time_stopped = now
|
|
|
447 break
|
|
|
448 elif now >= time_end:
|
|
22
|
449 raise TimeLimitExceeded
|
|
|
450 elif canceled():
|
|
|
451 raise CanceledByUser
|
|
21
|
452 if config.globalconf.force_zero_exitcode and case.process.returncode:
|
|
|
453 raise NonZeroExitCode(case.process.returncode)
|
|
22
|
454 callback()
|
|
|
455 case.has_called_back = True
|
|
21
|
456 with open(case.problem.config.outname, 'rU') as output:
|
|
|
457 return case.validate(output)
|
|
|
458
|
|
|
459
|
|
|
460 # This is the only test case type not executing any programs to be tested
|
|
|
461 class OutputOnlyTestCase(ValidatedTestCase):
|
|
|
462 __slots__ = ()
|
|
|
463 def cleanup(case): pass
|
|
|
464
|
|
|
465 class BestOutputTestCase(ValidatedTestCase):
|
|
|
466 __slots__ = ()
|
|
|
467
|
|
|
468 # This is the only test case type executing two programs simultaneously
|
|
|
469 class ReactiveTestCase(TestCase):
|
|
|
470 __slots__ = ()
|
|
|
471 # The basic idea is to launch the program to be tested and the grader
|
|
|
472 # and to pipe their standard I/O from and to each other,
|
|
|
473 # and then to capture the grader's exit code and use it
|
|
|
474 # like the exit code of a test validator is used.
|
|
|
475
|
|
|
476
|
|
|
477 def load_problem(prob, _types={'batch' : BatchTestCase,
|
|
|
478 'outonly' : OutputOnlyTestCase,
|
|
|
479 'bestout' : BestOutputTestCase,
|
|
|
480 'reactive': ReactiveTestCase}):
|
|
23
|
481 if options.legacy:
|
|
|
482 prob.config.usegroups = False
|
|
|
483 prob.config.tests = list(prob.config.tests)
|
|
|
484 for i, name in enumerate(prob.config.tests):
|
|
|
485 try:
|
|
|
486 if len(name) > 1:
|
|
|
487 prob.config.usegroups = True
|
|
|
488 break
|
|
|
489 elif len(name):
|
|
|
490 prob.config.tests[i] = name[0]
|
|
|
491 except Exception:
|
|
|
492 try:
|
|
|
493 # Try to retrieve the first two test case ID's and cache them on success
|
|
|
494 prob.config.tests[i] = name = iter(name)
|
|
|
495 except TypeError:
|
|
|
496 continue
|
|
|
497 try:
|
|
|
498 try:
|
|
|
499 first = next(name)
|
|
|
500 except NameError:
|
|
|
501 # Python 2.5 lacks the next() built-in
|
|
|
502 first = name.next()
|
|
|
503 except StopIteration:
|
|
|
504 prob.config.tests[i] = ()
|
|
|
505 else:
|
|
|
506 try:
|
|
|
507 try:
|
|
|
508 second = next(name)
|
|
|
509 except NameError:
|
|
|
510 second = name.next()
|
|
|
511 except StopIteration:
|
|
|
512 prob.config.tests[i] = first
|
|
|
513 else:
|
|
|
514 prob.config.tests[i] = itertools.chain((first, second), name)
|
|
|
515 prob.config.usegroups = True
|
|
|
516 break
|
|
16
|
517 if prob.config.usegroups:
|
|
22
|
518 # FIXME: test groups should again be supported!
|
|
16
|
519 pass
|
|
|
520 else:
|
|
21
|
521 # We will need to iterate over these configuration variables twice
|
|
|
522 try:
|
|
|
523 len(prob.config.dummies)
|
|
|
524 except Exception:
|
|
|
525 prob.config.dummies = tuple(prob.config.dummies)
|
|
|
526 try:
|
|
|
527 len(prob.config.tests)
|
|
|
528 except Exception:
|
|
23
|
529 prob.config.tests = tuple(prob.config.tests)
|
|
21
|
530 # First get prob.cache.padoutput right
|
|
|
531 for i in prob.config.dummies:
|
|
|
532 s = 'sample ' + str(i).zfill(prob.config.paddummies)
|
|
|
533 prob.cache.padoutput = max(prob.cache.padoutput, len(s))
|
|
16
|
534 for i in prob.config.tests:
|
|
21
|
535 s = str(i).zfill(prob.config.padtests)
|
|
|
536 prob.cache.padoutput = max(prob.cache.padoutput, len(s))
|
|
|
537 # Now yield the actual test cases
|
|
|
538 for i in prob.config.dummies:
|
|
|
539 s = str(i).zfill(prob.config.paddummies)
|
|
|
540 yield _types[prob.config.kind](prob, s, True, 0)
|
|
|
541 for i in prob.config.tests:
|
|
|
542 s = str(i).zfill(prob.config.padtests)
|
|
|
543 yield _types[prob.config.kind](prob, s, False, prob.config.pointmap.get(i, prob.config.pointmap.get(None, prob.config.maxexitcode if prob.config.maxexitcode else 1))) |
