mirror of https://github.com/dirtbags/moth.git
235 lines
8.9 KiB
Python
235 lines
8.9 KiB
Python
"""<H2>Introduction</H2>
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You are the proud new operator of a M-375 Pflanzarr Tank. Your tank is
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equipped with a powerful laser cannon, independently rotating turret
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section, up to 10 enemy detection sensors, and a standard issue NATO hull.
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Unfortunately, it lacks seats, and thus must rely own its own wits and your
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skills at designing those wits to survive.
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<H2>Programming Your Tank</H2>
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Your tanks are programmed using the Super Useful Command and Kontrol language,
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the very best in laser tank AI languages. It includes amazing features such
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as comments (Started by a #, ended at EOL), logic, versatility, and
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semi-colons (all lines must end in one). As with all new military systems
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it utilizes only integers; we must never rest in our
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diligence against the communist floating point conspiracy. Whitespace is
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provided by trusted contractors, and should never interfere with operations.
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<P>
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Your program should be separated into Setup and AI commands. The definitions
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section lets you designated the behaviors of its sensors and memory.
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Each setup command must begin with a '>'. Placing setup commands after
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the first AI command is a violation of protocol.
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Here are some examples of correct setup commands:
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<pre class="docs">>addsensor(80, 90, 33);
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>addsensor(50, 0, 10, 1);
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>addtimer(3);</pre>
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The AI section will act as the brain of your tank. Each AI line is
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separated into a group of conditions functions and a group of action
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functions. If all the conditions are satisfactory (true), all of the actions
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are given as orders. Conditions are separated by ampersands, actions separated
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by periods. Here are some examples of AI commands:
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<pre class="docs">
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sensor(1) & sensor(2) & fireready() : fire();
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sensor(0,0)&sin(5): move(40, 30) . turretcw(50);
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sensor(4) & random(4,5) : led(1).settoggle(0,1);</pre>
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Your tank will check its program each turn, and attempt to the best of its
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abilities to carry out its orders (or die trying). Like any military mind,
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your tank may receive a plethora of often conflicting orders and information.
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This a SMART TANK, however. It knows that the proper thing to do with each
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subsystem is to have that subsystem follow only the last order given each turn.
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"""
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import traceback
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import conditions
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import actions
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import setup
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class Statement(object):
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"""Represents a single program statement. If all the condition Functions
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evaluate to True, the actions are all executed in order."""
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def __init__(self, lineNum, line, conditions, actions):
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self.lineNum = lineNum
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self.line = line
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self._conditions = conditions
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self._actions = actions
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def __call__(self, tank):
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success = True
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for condition in self._conditions:
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if not condition(tank):
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success = False
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break
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if success:
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for action in self._actions:
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action(tank)
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class Program(object):
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"""This parses and represents a Tank program."""
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CONDITION_SEP = '&'
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ACTION_SEP = '.'
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def __init__(self, text):
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"""Initialize this program, parsing the given text."""
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self.errors = []
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self._program, self._setup = self._parse(text)
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def setup(self, tank):
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"""Execute all the setup actions."""
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for action in self._setup:
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try:
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action(tank)
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except Exception, msg:
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self.errors.append("Bad setup action, line %d, msg: %s" % \
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(action.lineNum, msg))
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def __call__(self, tank):
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"""Execute this program on the given tank."""
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for statement in self._program:
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try:
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statement(tank)
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except Exception, msg:
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traceback.print_exc()
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self.errors.append('Error executing program. \n'
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'(%d) - %s\n'
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'msg: %s\n' %
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(statement.lineNum, statement.line, msg) )
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def _parse(self, text):
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"""Parse the text of the given program."""
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program = []
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setup = []
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inSetup = True
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lines = text.split(';')
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lineNum = 0
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for line in lines:
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lineNum = lineNum + 1
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originalLine = line
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# Remove Comments
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parts = line.split('\n')
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for i in range(len(parts)):
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comment = parts[i].find('#')
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if comment != -1:
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parts[i] = parts[i][:comment]
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# Remove all whitespace
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line = ''.join(parts)
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line = line.replace('\r', '')
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line = line.replace('\t', '')
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line = line.replace(' ', '')
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if line == '':
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continue
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if line.startswith('>'):
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if inSetup:
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if '>' in line[1:] or ':' in line:
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self.errors.append('(%d) Missing semicolon: %s' %
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(lineNum, line))
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continue
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try:
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setupAction = self._parseSection(line[1:], 'setup')[0]
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setupAction.lineNum = lineNum
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setup.append(setupAction)
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except Exception, msg:
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self.errors.append('(%d) Error parsing setup line: %s'
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'\nThe error was: %s' %
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(lineNum, originalLine, msg))
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continue
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else:
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self.errors.append('(%d) Setup lines aren\'t allowed '
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'after the first command: %s' %
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(lineNum, originalLine))
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else:
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# We've hit the first non-blank, non-comment, non-setup
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# line
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inSetup = False
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semicolons = line.count(':')
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if semicolons > 1:
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self.errors.append('(%d) Missing semicolon: %s' %
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(lineNum, line))
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continue
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elif semicolons == 1:
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conditions, actions = line.split(':')
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else:
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self.errors.append('(%d) Invalid Line, no ":" seperator: %s'%
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(lineNum, line) )
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try:
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conditions = self._parseSection(conditions, 'condition')
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except Exception, msg:
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self.errors.append('(%d) %s - "%s"' %
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(lineNum, msg, line) )
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continue
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try:
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actions = self._parseSection(actions, 'action')
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except Exception, msg:
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self.errors.append('(%d) %s - "%s"' %
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(lineNum, msg, originalLine) )
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continue
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program.append(Statement(lineNum, line, conditions, actions))
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return program, setup
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def _parseSection(self, section, sectionType):
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"""Parses either the action or condition section of each command.
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@param section: The text of the section of the command to be parsed.
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@param sectionType: The type of section to be parsed. Should be:
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'condition', 'action', or 'setup'.
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@raises ValueError: Raises ValueErrors when parsing errors occur.
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@returns: Returns a list of parsed section components (Function objects).
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"""
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if sectionType == 'condition':
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parts = section.split(self.CONDITION_SEP)
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functions = conditions.conditions
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if section == '':
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return []
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elif sectionType == 'action':
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parts = section.split(self.ACTION_SEP)
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functions = actions.actions
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if section == '':
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raise ValueError("The action section cannot be empty.")
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elif sectionType == 'setup':
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parts = [section]
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functions = setup.setup
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else:
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raise ValueError('Invalid section Type - Contact Contest Admin')
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parsed = []
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for part in parts:
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pos = part.find('(')
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if pos == -1:
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raise ValueError("Missing open paren in %s: %s" %
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(sectionType, part) )
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funcName = part[:pos]
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if funcName not in functions:
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raise ValueError("%s function %s is not accepted." %
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(sectionType.capitalize(), funcName) )
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if part[-1] != ')':
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raise ValueError("Missing closing paren in %s: %s" %
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(condition, sectionType) )
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args = part[pos+1:-1]
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if args != '':
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args = args.split(',')
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for i in range(len(args)):
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args[i] = int(args[i])
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else:
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args = []
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parsed.append(functions[funcName](*args))
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return parsed
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