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shlex.pyc
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Python Compiled Bytecode
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2005-10-18
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231 lines
# Source Generated with Decompyle++
# File: in.pyc (Python 2.4)
'''A lexical analyzer class for simple shell-like syntaxes.'''
import os.path as os
import sys
from collections import deque
try:
from cStringIO import StringIO
except ImportError:
from StringIO import StringIO
__all__ = [
'shlex',
'split']
class shlex:
'''A lexical analyzer class for simple shell-like syntaxes.'''
def __init__(self, instream = None, infile = None, posix = False):
if isinstance(instream, basestring):
instream = StringIO(instream)
if instream is not None:
self.instream = instream
self.infile = infile
else:
self.instream = sys.stdin
self.infile = None
self.posix = posix
if posix:
self.eof = None
else:
self.eof = ''
self.commenters = '#'
self.wordchars = 'abcdfeghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789_'
if self.posix:
self.wordchars += '\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd8\xd9\xda\xdb\xdc\xdd\xde'
self.whitespace = ' \t\r\n'
self.whitespace_split = False
self.quotes = '\'"'
self.escape = '\\'
self.escapedquotes = '"'
self.state = ' '
self.pushback = deque()
self.lineno = 1
self.debug = 0
self.token = ''
self.filestack = deque()
self.source = None
if self.debug:
print 'shlex: reading from %s, line %d' % (self.instream, self.lineno)
def push_token(self, tok):
'''Push a token onto the stack popped by the get_token method'''
if self.debug >= 1:
print 'shlex: pushing token ' + repr(tok)
self.pushback.appendleft(tok)
def push_source(self, newstream, newfile = None):
"""Push an input source onto the lexer's input source stack."""
if isinstance(newstream, basestring):
newstream = StringIO(newstream)
self.filestack.appendleft((self.infile, self.instream, self.lineno))
self.infile = newfile
self.instream = newstream
self.lineno = 1
if self.debug:
if newfile is not None:
print 'shlex: pushing to file %s' % (self.infile,)
else:
print 'shlex: pushing to stream %s' % (self.instream,)
def pop_source(self):
'''Pop the input source stack.'''
self.instream.close()
(self.infile, self.instream, self.lineno) = self.filestack.popleft()
if self.debug:
print 'shlex: popping to %s, line %d' % (self.instream, self.lineno)
self.state = ' '
def get_token(self):
"""Get a token from the input stream (or from stack if it's nonempty)"""
if self.pushback:
tok = self.pushback.popleft()
if self.debug >= 1:
print 'shlex: popping token ' + repr(tok)
return tok
raw = self.read_token()
if self.source is not None:
while raw == self.source:
spec = self.sourcehook(self.read_token())
if spec:
(newfile, newstream) = spec
self.push_source(newstream, newfile)
raw = self.get_token()
while raw == self.eof:
if not self.filestack:
return self.eof
continue
self.pop_source()
raw = self.get_token()
if self.debug >= 1:
if raw != self.eof:
print 'shlex: token=' + repr(raw)
else:
print 'shlex: token=EOF'
return raw
def read_token(self):
quoted = False
escapedstate = ' '
while True:
nextchar = self.instream.read(1)
if nextchar == '\n':
self.lineno = self.lineno + 1
if self.debug >= 3:
print 'shlex: in state', repr(self.state), 'I see character:', repr(nextchar)
None if self.state is None else nextchar in self.escape
if self.state in self.quotes:
quoted = True
if not nextchar:
if self.debug >= 2:
print 'shlex: I see EOF in quotes state'
raise ValueError, 'No closing quotation'
if nextchar == self.state:
if not self.posix:
self.token = self.token + nextchar
self.state = ' '
break
else:
self.state = 'a'
elif self.posix and nextchar in self.escape and self.state in self.escapedquotes:
escapedstate = self.state
self.state = nextchar
else:
self.token = self.token + nextchar
self.state in self.escapedquotes
None if self.state in self.escape else self.whitespace_split
result = self.token
self.token = ''
if self.posix and not quoted and result == '':
result = None
if self.debug > 1:
if result:
print 'shlex: raw token=' + repr(result)
else:
print 'shlex: raw token=EOF'
return result
def sourcehook(self, newfile):
'''Hook called on a filename to be sourced.'''
if newfile[0] == '"':
newfile = newfile[1:-1]
if isinstance(self.infile, basestring) and not os.path.isabs(newfile):
newfile = os.path.join(os.path.dirname(self.infile), newfile)
return (newfile, open(newfile, 'r'))
def error_leader(self, infile = None, lineno = None):
'''Emit a C-compiler-like, Emacs-friendly error-message leader.'''
if infile is None:
infile = self.infile
if lineno is None:
lineno = self.lineno
return '"%s", line %d: ' % (infile, lineno)
def __iter__(self):
return self
def next(self):
token = self.get_token()
if token == self.eof:
raise StopIteration
return token
def split(s, comments = False):
lex = shlex(s, posix = True)
lex.whitespace_split = True
if not comments:
lex.commenters = ''
return list(lex)
if __name__ == '__main__':
if len(sys.argv) == 1:
lexer = shlex()
else:
file = sys.argv[1]
lexer = shlex(open(file), file)
while None:
tt = lexer.get_token()
if tt:
print 'Token: ' + repr(tt)
continue
break