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#!/usr/bin/env python
## locate_blocks() needs heavy optimizations... is way too slow right now!
## Any suggestion from python wizards? :-)
import re
import sys
from datetime import datetime
from six.moves import xrange
import pstats
import cProfile
from cStringIO import StringIO
def profile(fn):
def wrapper(*args, **kwargs):
profiler = cProfile.Profile()
stream = StringIO()
profiler.enable()
try:
res = fn(*args, **kwargs)
finally:
profiler.disable()
stats = pstats.Stats(profiler, stream=stream)
stats.sort_stats('time')
print >>stream, ""
print >>stream, "=" * 100
print >>stream, "Stats:"
stats.print_stats()
print >>stream, "=" * 100
print >>stream, "Callers:"
stats.print_callers()
print >>stream, "=" * 100
print >>stream, "Callees:"
stats.print_callees()
print >>sys.stderr, stream.getvalue()
stream.close()
return res
return wrapper
################################################################################
# Helpers
BASE_UNITS = ['em', 'ex', 'px', 'cm', 'mm', 'in', 'pt', 'pc', 'deg', 'rad'
'grad', 'ms', 's', 'hz', 'khz', '%']
PATTERNS = [
('":"', ':'),
('[ \r\t\n]+', '[ \r\t\n]+'),
('COMMA', ','),
('LPAR', '\\(|\\['),
('RPAR', '\\)|\\]'),
('END', '$'),
('MUL', '[*]'),
('DIV', '/'),
('ADD', '[+]'),
('SUB', '-\\s'),
('SIGN', '-(?![a-zA-Z_])'),
('AND', '(?<![-\\w])and(?![-\\w])'),
('OR', '(?<![-\\w])or(?![-\\w])'),
('NOT', '(?<![-\\w])not(?![-\\w])'),
('NE', '!='),
('INV', '!'),
('EQ', '=='),
('LE', '<='),
('GE', '>='),
('LT', '<'),
('GT', '>'),
('STR', "'[^']*'"),
('QSTR', '"[^"]*"'),
('UNITS', '(?<!\\s)(?:' + '|'.join(BASE_UNITS) + ')(?![-\\w])'),
('NUM', '(?:\\d+(?:\\.\\d*)?|\\.\\d+)'),
('COLOR', '#(?:[a-fA-F0-9]{6}|[a-fA-F0-9]{3})(?![a-fA-F0-9])'),
('VAR', '\\$[-a-zA-Z0-9_]+'),
('NAME', '\\$?[-a-zA-Z0-9_]+'),
('FNCT', '[-a-zA-Z_][-a-zA-Z0-9_]*(?=\\()'),
('ID', '!?[-a-zA-Z_][-a-zA-Z0-9_]*'),
]
################################################################################
# Parser
DEBUG = False
class NoMoreTokens(Exception):
"""
Another exception object, for when we run out of tokens
"""
pass
class Scanner(object):
def __init__(self, patterns, ignore, input=None):
"""
Patterns is [(terminal,regex)...]
Ignore is [terminal,...];
Input is a string
"""
self.reset(input)
self.ignore = ignore
# The stored patterns are a pair (compiled regex,source
# regex). If the patterns variable passed in to the
# constructor is None, we assume that the class already has a
# proper .patterns list constructed
if patterns is not None:
self.patterns = []
for k, r in patterns:
self.patterns.append((k, re.compile(r)))
def reset(self, input):
self.tokens = []
self.restrictions = []
self.input = input
self.pos = 0
def __repr__(self):
"""
Print the last 10 tokens that have been scanned in
"""
output = ''
for t in self.tokens[-10:]:
output = "%s\n (@%s) %s = %s" % (output, t[0], t[2], repr(t[3]))
return output
def _scan(self, restrict):
"""
Should scan another token and add it to the list, self.tokens,
and add the restriction to self.restrictions
"""
# Keep looking for a token, ignoring any in self.ignore
token = None
while True:
tok = None
best_pat = None
# Search the patterns for a match, with earlier
# tokens in the list having preference
best_pat_len = 0
for tok, regex in self.patterns:
if DEBUG:
print("\tTrying %s: %s at pos %d -> %s" % (repr(tok), repr(regex.pattern), self.pos, repr(self.input)))
# First check to see if we're restricting to this token
if restrict and tok not in restrict and tok not in self.ignore:
if DEBUG:
print "\tSkipping %s!" % repr(tok)
continue
m = regex.match(self.input, self.pos)
if m:
# We got a match
best_pat = tok
best_pat_len = len(m.group(0))
if DEBUG:
print("Match OK! %s: %s at pos %d" % (repr(tok), repr(regex.pattern), self.pos))
break
# If we didn't find anything, raise an error
if best_pat is None:
msg = "Bad token: %s" % ("???" if tok is None else repr(tok),)
if restrict:
msg = "%s found while trying to find one of the restricted tokens: %s" % ("???" if tok is None else repr(tok), ", ".join(repr(r) for r in restrict))
raise SyntaxError("SyntaxError[@ char %s: %s]" % (repr(self.pos), msg))
# If we found something that isn't to be ignored, return it
if best_pat in self.ignore:
# This token should be ignored...
self.pos += best_pat_len
else:
end_pos = self.pos + best_pat_len
# Create a token with this data
token = (
self.pos,
end_pos,
best_pat,
self.input[self.pos:end_pos]
)
break
if token is not None:
self.pos = token[1]
# Only add this token if it's not in the list
# (to prevent looping)
if not self.tokens or token != self.tokens[-1]:
self.tokens.append(token)
self.restrictions.append(restrict)
return 1
return 0
def token(self, i, restrict=None):
"""
Get the i'th token, and if i is one past the end, then scan
for another token; restrict is a list of tokens that
are allowed, or 0 for any token.
"""
tokens_len = len(self.tokens)
if i == tokens_len: # We are at the end, get the next...
tokens_len += self._scan(restrict)
elif i >= 0 and i < tokens_len:
if restrict and self.restrictions[i] and restrict > self.restrictions[i]:
raise NotImplementedError("Unimplemented: restriction set changed")
if i >= 0 and i < tokens_len:
return self.tokens[i]
raise NoMoreTokens()
def rewind(self, i):
tokens_len = len(self.tokens)
if i <= tokens_len:
token = self.tokens[i]
self.tokens = self.tokens[:i]
self.restrictions = self.restrictions[:i]
self.pos = token[0]
class _Scanner_a(Scanner):
patterns = None
_patterns = PATTERNS
def __init__(self, input=None):
if hasattr(self, 'setup_patterns'):
self.setup_patterns(self._patterns)
elif self.patterns is None:
self.__class__.patterns = []
for t, p in self._patterns:
self.patterns.append((t, re.compile(p)))
super(_Scanner_a, self).__init__(None, ['[ \r\t\n]+'], input)
################################################################################
try:
from _speedups import Scanner
class _Scanner_b(Scanner):
patterns = None
_patterns = PATTERNS
def __init__(self, input=None):
if hasattr(self, 'setup_patterns'):
self.setup_patterns(self._patterns)
elif self.patterns is None:
self.__class__.patterns = []
for t, p in self._patterns:
self.patterns.append((t, re.compile(p)))
super(_Scanner_b, self).__init__(None, ['[ \r\t\n]+'], input)
except ImportError:
_Scanner_b = None
def process_scan(Scanner, level=0, dump=False):
ret = '' if dump else None
s = Scanner('[(5px - 3) * (5px - 3)], function($arg1: a b c, $arg2: 4px + 5px, $arg3: red #fff #000000 #ffff0088), "Some string"')
i = 0
while True:
try:
s.token(i)
i += 1
if dump:
ret += '%s\n%s\n' % ('-' * 70, repr(s))
except:
break
return ret
# Expected resulting string:
EXPECTED = '----------------------------------------------------------------------\n\n (@0) LPAR = \'[\'\n----------------------------------------------------------------------\n\n (@0) LPAR = \'[\'\n (@1) LPAR = \'(\'\n----------------------------------------------------------------------\n\n (@0) LPAR = \'[\'\n (@1) LPAR = \'(\'\n (@2) NUM = \'5\'\n----------------------------------------------------------------------\n\n (@0) LPAR = \'[\'\n (@1) LPAR = \'(\'\n (@2) NUM = \'5\'\n (@3) UNITS = \'px\'\n----------------------------------------------------------------------\n\n (@0) LPAR = \'[\'\n (@1) LPAR = \'(\'\n (@2) NUM = \'5\'\n (@3) UNITS = \'px\'\n (@6) SUB = \'- \'\n----------------------------------------------------------------------\n\n (@0) LPAR = \'[\'\n (@1) LPAR = \'(\'\n (@2) NUM = \'5\'\n (@3) UNITS = \'px\'\n (@6) SUB = \'- \'\n (@8) NUM = \'3\'\n----------------------------------------------------------------------\n\n (@0) LPAR = \'[\'\n (@1) LPAR = \'(\'\n (@2) NUM = \'5\'\n (@3) UNITS = \'px\'\n (@6) SUB = \'- \'\n (@8) NUM = \'3\'\n (@9) RPAR = \')\'\n----------------------------------------------------------------------\n\n (@0) LPAR = \'[\'\n (@1) LPAR = \'(\'\n (@2) NUM = \'5\'\n (@3) UNITS = \'px\'\n (@6) SUB = \'- \'\n (@8) NUM = \'3\'\n (@9) RPAR = \')\'\n (@11) MUL = \'*\'\n----------------------------------------------------------------------\n\n (@0) LPAR = \'[\'\n (@1) LPAR = \'(\'\n (@2) NUM = \'5\'\n (@3) UNITS = \'px\'\n (@6) SUB = \'- \'\n (@8) NUM = \'3\'\n (@9) RPAR = \')\'\n (@11) MUL = \'*\'\n (@13) LPAR = \'(\'\n----------------------------------------------------------------------\n\n (@0) LPAR = \'[\'\n (@1) LPAR = \'(\'\n (@2) NUM = \'5\'\n (@3) UNITS = \'px\'\n (@6) SUB = \'- \'\n (@8) NUM = \'3\'\n (@9) RPAR = \')\'\n (@11) MUL = \'*\'\n (@13) LPAR = \'(\'\n (@14) NUM = \'5\'\n----------------------------------------------------------------------\n\n (@1) LPAR = \'(\'\n (@2) NUM = \'5\'\n (@3) UNITS = \'px\'\n (@6) SUB = \'- \'\n (@8) NUM = \'3\'\n (@9) RPAR = \')\'\n (@11) MUL = \'*\'\n (@13) LPAR = \'(\'\n (@14) NUM = \'5\'\n (@15) UNITS = \'px\'\n----------------------------------------------------------------------\n\n (@2) NUM = \'5\'\n (@3) UNITS = \'px\'\n (@6) SUB = \'- \'\n (@8) NUM = \'3\'\n (@9) RPAR = \')\'\n (@11) MUL = \'*\'\n (@13) LPAR = \'(\'\n (@14) NUM = \'5\'\n (@15) UNITS = \'px\'\n (@18) SUB = \'- \'\n----------------------------------------------------------------------\n\n (@3) UNITS = \'px\'\n (@6) SUB = \'- \'\n (@8) NUM = \'3\'\n (@9) RPAR = \')\'\n (@11) MUL = \'*\'\n (@13) LPAR = \'(\'\n (@14) NUM = \'5\'\n (@15) UNITS = \'px\'\n (@18) SUB = \'- \'\n (@20) NUM = \'3\'\n----------------------------------------------------------------------\n\n (@6) SUB = \'- \'\n (@8) NUM = \'3\'\n (@9) RPAR = \')\'\n (@11) MUL = \'*\'\n (@13) LPAR = \'(\'\n (@14) NUM = \'5\'\n (@15) UNITS = \'px\'\n (@18) SUB = \'- \'\n (@20) NUM = \'3\'\n (@21) RPAR = \')\'\n----------------------------------------------------------------------\n\n (@8) NUM = \'3\'\n (@9) RPAR = \')\'\n (@11) MUL = \'*\'\n (@13) LPAR = \'(\'\n (@14) NUM = \'5\'\n (@15) UNITS = \'px\'\n (@18) SUB = \'- \'\n (@20) NUM = \'3\'\n (@21) RPAR = \')\'\n (@22) RPAR = \']\'\n----------------------------------------------------------------------\n\n (@9) RPAR = \')\'\n (@11) MUL = \'*\'\n (@13) LPAR = \'(\'\n (@14) NUM = \'5\'\n (@15) UNITS = \'px\'\n (@18) SUB = \'- \'\n (@20) NUM = \'3\'\n (@21) RPAR = \')\'\n (@22) RPAR = \']\'\n (@23) COMMA = \',\'\n----------------------------------------------------------------------\n\n (@11) MUL = \'*\'\n (@13) LPAR = \'(\'\n (@14) NUM = \'5\'\n (@15) UNITS = \'px\'\n (@18) SUB = \'- \'\n (@20) NUM = \'3\'\n (@21) RPAR = \')\'\n (@22) RPAR = \']\'\n (@23) COMMA = \',\'\n (@25) NAME = \'function\'\n----------------------------------------------------------------------\n\n (@13) LPAR = \'(\'\n (@14) NUM = \'5\'\n (@15) UNITS = \'px\'\n (@18) SUB = \'- \'\n (@20) NUM = \'3\'\n (@21) RPAR = \')\'\n (@22) RPAR = \']\'\n (@23) COMMA = \',\'\n (@25) NAME = \'function\'\n (@33) LPAR = \'(\'\n----------------------------------------------------------------------\n\n (@14) NUM = \'5\'\n (@15) UNITS = \'px\'\n (@18) SUB = \'- \'\n (@20) NUM = \'3\'\n (@21) RPAR = \')\'\n (@22) RPAR = \']\'\n (@23) COMMA = \',\'\n (@25) NAME = \'function\'\n (@33) LPAR = \'(\'\n (@34) VAR = \'$arg1\'\n----------------------------------------------------------------------\n\n (@15) UNITS = \'px\'\n (@18) SUB = \'- \'\n (@20) NUM = \'3\'\n (@21) RPAR = \')\'\n (@22) RPAR = \']\'\n (@23) COMMA = \',\'\n (@25) NAME = \'function\'\n (@33) LPAR = \'(\'\n (@34) VAR = \'$arg1\'\n (@39) ":" = \':\'\n----------------------------------------------------------------------\n\n (@18) SUB = \'- \'\n (@20) NUM = \'3\'\n (@21) RPAR = \')\'\n (@22) RPAR = \']\'\n (@23) COMMA = \',\'\n (@25) NAME = \'function\'\n (@33) LPAR = \'(\'\n (@34) VAR = \'$arg1\'\n (@39) ":" = \':\'\n (@41) NAME = \'a\'\n----------------------------------------------------------------------\n\n (@20) NUM = \'3\'\n (@21) RPAR = \')\'\n (@22) RPAR = \']\'\n (@23) COMMA = \',\'\n (@25) NAME = \'function\'\n (@33) LPAR = \'(\'\n (@34) VAR = \'$arg1\'\n (@39) ":" = \':\'\n (@41) NAME = \'a\'\n (@43) NAME = \'b\'\n----------------------------------------------------------------------\n\n (@21) RPAR = \')\'\n (@22) RPAR = \']\'\n (@23) COMMA = \',\'\n (@25) NAME = \'function\'\n (@33) LPAR = \'(\'\n (@34) VAR = \'$arg1\'\n (@39) ":" = \':\'\n (@41) NAME = \'a\'\n (@43) NAME = \'b\'\n (@45) NAME = \'c\'\n----------------------------------------------------------------------\n\n (@22) RPAR = \']\'\n (@23) COMMA = \',\'\n (@25) NAME = \'function\'\n (@33) LPAR = \'(\'\n (@34) VAR = \'$arg1\'\n (@39) ":" = \':\'\n (@41) NAME = \'a\'\n (@43) NAME = \'b\'\n (@45) NAME = \'c\'\n (@46) COMMA = \',\'\n----------------------------------------------------------------------\n\n (@23) COMMA = \',\'\n (@25) NAME = \'function\'\n (@33) LPAR = \'(\'\n (@34) VAR = \'$arg1\'\n (@39) ":" = \':\'\n (@41) NAME = \'a\'\n (@43) NAME = \'b\'\n (@45) NAME = \'c\'\n (@46) COMMA = \',\'\n (@48) VAR = \'$arg2\'\n----------------------------------------------------------------------\n\n (@25) NAME = \'function\'\n (@33) LPAR = \'(\'\n (@34) VAR = \'$arg1\'\n (@39) ":" = \':\'\n (@41) NAME = \'a\'\n (@43) NAME = \'b\'\n (@45) NAME = \'c\'\n (@46) COMMA = \',\'\n (@48) VAR = \'$arg2\'\n (@53) ":" = \':\'\n----------------------------------------------------------------------\n\n (@33) LPAR = \'(\'\n (@34) VAR = \'$arg1\'\n (@39) ":" = \':\'\n (@41) NAME = \'a\'\n (@43) NAME = \'b\'\n (@45) NAME = \'c\'\n (@46) COMMA = \',\'\n (@48) VAR = \'$arg2\'\n (@53) ":" = \':\'\n (@55) NUM = \'4\'\n----------------------------------------------------------------------\n\n (@34) VAR = \'$arg1\'\n (@39) ":" = \':\'\n (@41) NAME = \'a\'\n (@43) NAME = \'b\'\n (@45) NAME = \'c\'\n (@46) COMMA = \',\'\n (@48) VAR = \'$arg2\'\n (@53) ":" = \':\'\n (@55) NUM = \'4\'\n (@56) UNITS = \'px\'\n----------------------------------------------------------------------\n\n (@39) ":" = \':\'\n (@41) NAME = \'a\'\n (@43) NAME = \'b\'\n (@45) NAME = \'c\'\n (@46) COMMA = \',\'\n (@48) VAR = \'$arg2\'\n (@53) ":" = \':\'\n (@55) NUM = \'4\'\n (@56) UNITS = \'px\'\n (@59) ADD = \'+\'\n----------------------------------------------------------------------\n\n (@41) NAME = \'a\'\n (@43) NAME = \'b\'\n (@45) NAME = \'c\'\n (@46) COMMA = \',\'\n (@48) VAR = \'$arg2\'\n (@53) ":" = \':\'\n (@55) NUM = \'4\'\n (@56) UNITS = \'px\'\n (@59) ADD = \'+\'\n (@61) NUM = \'5\'\n----------------------------------------------------------------------\n\n (@43) NAME = \'b\'\n (@45) NAME = \'c\'\n (@46) COMMA = \',\'\n (@48) VAR = \'$arg2\'\n (@53) ":" = \':\'\n (@55) NUM = \'4\'\n (@56) UNITS = \'px\'\n (@59) ADD = \'+\'\n (@61) NUM = \'5\'\n (@62) UNITS = \'px\'\n----------------------------------------------------------------------\n\n (@45) NAME = \'c\'\n (@46) COMMA = \',\'\n (@48) VAR = \'$arg2\'\n (@53) ":" = \':\'\n (@55) NUM = \'4\'\n (@56) UNITS = \'px\'\n (@59) ADD = \'+\'\n (@61) NUM = \'5\'\n (@62) UNITS = \'px\'\n (@64) COMMA = \',\'\n----------------------------------------------------------------------\n\n (@46) COMMA = \',\'\n (@48) VAR = \'$arg2\'\n (@53) ":" = \':\'\n (@55) NUM = \'4\'\n (@56) UNITS = \'px\'\n (@59) ADD = \'+\'\n (@61) NUM = \'5\'\n (@62) UNITS = \'px\'\n (@64) COMMA = \',\'\n (@66) VAR = \'$arg3\'\n----------------------------------------------------------------------\n\n (@48) VAR = \'$arg2\'\n (@53) ":" = \':\'\n (@55) NUM = \'4\'\n (@56) UNITS = \'px\'\n (@59) ADD = \'+\'\n (@61) NUM = \'5\'\n (@62) UNITS = \'px\'\n (@64) COMMA = \',\'\n (@66) VAR = \'$arg3\'\n (@71) ":" = \':\'\n----------------------------------------------------------------------\n\n (@53) ":" = \':\'\n (@55) NUM = \'4\'\n (@56) UNITS = \'px\'\n (@59) ADD = \'+\'\n (@61) NUM = \'5\'\n (@62) UNITS = \'px\'\n (@64) COMMA = \',\'\n (@66) VAR = \'$arg3\'\n (@71) ":" = \':\'\n (@73) NAME = \'red\'\n----------------------------------------------------------------------\n\n (@55) NUM = \'4\'\n (@56) UNITS = \'px\'\n (@59) ADD = \'+\'\n (@61) NUM = \'5\'\n (@62) UNITS = \'px\'\n (@64) COMMA = \',\'\n (@66) VAR = \'$arg3\'\n (@71) ":" = \':\'\n (@73) NAME = \'red\'\n (@77) COLOR = \'#fff\'\n----------------------------------------------------------------------\n\n (@56) UNITS = \'px\'\n (@59) ADD = \'+\'\n (@61) NUM = \'5\'\n (@62) UNITS = \'px\'\n (@64) COMMA = \',\'\n (@66) VAR = \'$arg3\'\n (@71) ":" = \':\'\n (@73) NAME = \'red\'\n (@77) COLOR = \'#fff\'\n (@82) COLOR = \'#000000\'\n'
def process_scans(Scanner):
for q in xrange(10000):
process_scan(Scanner)
profiled_process_scans = profile(process_scans)
if __name__ == "__main__":
for scanner, desc in (
(_Scanner_a, "Pure Python, Full algorithm (_Scanner_a)"),
(_Scanner_b, "Builtin C Function, Full algorithm (_Scanner_b)"),
):
if scanner:
ret = process_scan(scanner, dump=True)
# print "This is what %s returned:" % desc
# print ret
# print repr(ret)
assert ret == EXPECTED, '\nFrom %s, got:\n%s\nShould be:\n%s' % (desc, ret, EXPECTED)
start = datetime.now()
print >>sys.stderr, "Timing: %s..." % desc,
process_scans(scanner)
elap = datetime.now() - start
elapms = elap.seconds * 1000.0 + elap.microseconds / 1000.0
print >>sys.stderr, "Done! took %06.3fms" % elapms
|
