You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
848 lines
23 KiB
848 lines
23 KiB
11 years ago
|
#!/usr/bin/env python
|
||
|
|
#
|
||
|
|
# Copyright 2008, Google Inc.
|
||
|
|
# All rights reserved.
|
||
|
|
#
|
||
|
|
# Redistribution and use in source and binary forms, with or without
|
||
|
|
# modification, are permitted provided that the following conditions are
|
||
|
|
# met:
|
||
|
|
#
|
||
|
|
# * Redistributions of source code must retain the above copyright
|
||
|
|
# notice, this list of conditions and the following disclaimer.
|
||
|
|
# * Redistributions in binary form must reproduce the above
|
||
|
|
# copyright notice, this list of conditions and the following disclaimer
|
||
|
|
# in the documentation and/or other materials provided with the
|
||
|
|
# distribution.
|
||
|
|
# * Neither the name of Google Inc. nor the names of its
|
||
|
|
# contributors may be used to endorse or promote products derived from
|
||
|
|
# this software without specific prior written permission.
|
||
|
|
#
|
||
|
|
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
||
|
|
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
|
||
|
|
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
||
|
|
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
|
||
|
|
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
|
||
|
|
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
||
|
|
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
||
|
|
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
||
|
|
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
|
||
|
|
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
||
|
|
|
||
|
|
"""pump v0.2.0 - Pretty Useful for Meta Programming.
|
||
|
|
|
||
|
|
A tool for preprocessor meta programming. Useful for generating
|
||
|
|
repetitive boilerplate code. Especially useful for writing C++
|
||
|
|
classes, functions, macros, and templates that need to work with
|
||
|
|
various number of arguments.
|
||
|
|
|
||
|
|
USAGE:
|
||
|
|
pump.py SOURCE_FILE
|
||
|
|
|
||
|
|
EXAMPLES:
|
||
|
|
pump.py foo.cc.pump
|
||
|
|
Converts foo.cc.pump to foo.cc.
|
||
|
|
|
||
|
|
GRAMMAR:
|
||
|
|
CODE ::= ATOMIC_CODE*
|
||
|
|
ATOMIC_CODE ::= $var ID = EXPRESSION
|
||
|
|
| $var ID = [[ CODE ]]
|
||
|
|
| $range ID EXPRESSION..EXPRESSION
|
||
|
|
| $for ID SEPARATOR [[ CODE ]]
|
||
|
|
| $($)
|
||
|
|
| $ID
|
||
|
|
| $(EXPRESSION)
|
||
|
|
| $if EXPRESSION [[ CODE ]] ELSE_BRANCH
|
||
|
|
| [[ CODE ]]
|
||
|
|
| RAW_CODE
|
||
|
|
SEPARATOR ::= RAW_CODE | EMPTY
|
||
|
|
ELSE_BRANCH ::= $else [[ CODE ]]
|
||
|
|
| $elif EXPRESSION [[ CODE ]] ELSE_BRANCH
|
||
|
|
| EMPTY
|
||
|
|
EXPRESSION has Python syntax.
|
||
|
|
"""
|
||
|
|
|
||
|
|
__author__ = 'wan@google.com (Zhanyong Wan)'
|
||
|
|
|
||
|
|
import os
|
||
|
|
import re
|
||
|
|
import sys
|
||
|
|
|
||
|
|
|
||
|
|
TOKEN_TABLE = [
|
||
|
|
(re.compile(r'\$var\s+'), '$var'),
|
||
|
|
(re.compile(r'\$elif\s+'), '$elif'),
|
||
|
|
(re.compile(r'\$else\s+'), '$else'),
|
||
|
|
(re.compile(r'\$for\s+'), '$for'),
|
||
|
|
(re.compile(r'\$if\s+'), '$if'),
|
||
|
|
(re.compile(r'\$range\s+'), '$range'),
|
||
|
|
(re.compile(r'\$[_A-Za-z]\w*'), '$id'),
|
||
|
|
(re.compile(r'\$\(\$\)'), '$($)'),
|
||
|
|
(re.compile(r'\$'), '$'),
|
||
|
|
(re.compile(r'\[\[\n?'), '[['),
|
||
|
|
(re.compile(r'\]\]\n?'), ']]'),
|
||
|
|
]
|
||
|
|
|
||
|
|
|
||
|
|
class Cursor:
|
||
|
|
"""Represents a position (line and column) in a text file."""
|
||
|
|
|
||
|
|
def __init__(self, line=-1, column=-1):
|
||
|
|
self.line = line
|
||
|
|
self.column = column
|
||
|
|
|
||
|
|
def __eq__(self, rhs):
|
||
|
|
return self.line == rhs.line and self.column == rhs.column
|
||
|
|
|
||
|
|
def __ne__(self, rhs):
|
||
|
|
return not self == rhs
|
||
|
|
|
||
|
|
def __lt__(self, rhs):
|
||
|
|
return self.line < rhs.line or (
|
||
|
|
self.line == rhs.line and self.column < rhs.column)
|
||
|
|
|
||
|
|
def __le__(self, rhs):
|
||
|
|
return self < rhs or self == rhs
|
||
|
|
|
||
|
|
def __gt__(self, rhs):
|
||
|
|
return rhs < self
|
||
|
|
|
||
|
|
def __ge__(self, rhs):
|
||
|
|
return rhs <= self
|
||
|
|
|
||
|
|
def __str__(self):
|
||
|
|
if self == Eof():
|
||
|
|
return 'EOF'
|
||
|
|
else:
|
||
|
|
return '%s(%s)' % (self.line + 1, self.column)
|
||
|
|
|
||
|
|
def __add__(self, offset):
|
||
|
|
return Cursor(self.line, self.column + offset)
|
||
|
|
|
||
|
|
def __sub__(self, offset):
|
||
|
|
return Cursor(self.line, self.column - offset)
|
||
|
|
|
||
|
|
def Clone(self):
|
||
|
|
"""Returns a copy of self."""
|
||
|
|
|
||
|
|
return Cursor(self.line, self.column)
|
||
|
|
|
||
|
|
|
||
|
|
# Special cursor to indicate the end-of-file.
|
||
|
|
def Eof():
|
||
|
|
"""Returns the special cursor to denote the end-of-file."""
|
||
|
|
return Cursor(-1, -1)
|
||
|
|
|
||
|
|
|
||
|
|
class Token:
|
||
|
|
"""Represents a token in a Pump source file."""
|
||
|
|
|
||
|
|
def __init__(self, start=None, end=None, value=None, token_type=None):
|
||
|
|
if start is None:
|
||
|
|
self.start = Eof()
|
||
|
|
else:
|
||
|
|
self.start = start
|
||
|
|
if end is None:
|
||
|
|
self.end = Eof()
|
||
|
|
else:
|
||
|
|
self.end = end
|
||
|
|
self.value = value
|
||
|
|
self.token_type = token_type
|
||
|
|
|
||
|
|
def __str__(self):
|
||
|
|
return 'Token @%s: \'%s\' type=%s' % (
|
||
|
|
self.start, self.value, self.token_type)
|
||
|
|
|
||
|
|
def Clone(self):
|
||
|
|
"""Returns a copy of self."""
|
||
|
|
|
||
|
|
return Token(self.start.Clone(), self.end.Clone(), self.value,
|
||
|
|
self.token_type)
|
||
|
|
|
||
|
|
|
||
|
|
def StartsWith(lines, pos, string):
|
||
|
|
"""Returns True iff the given position in lines starts with 'string'."""
|
||
|
|
|
||
|
|
return lines[pos.line][pos.column:].startswith(string)
|
||
|
|
|
||
|
|
|
||
|
|
def FindFirstInLine(line, token_table):
|
||
|
|
best_match_start = -1
|
||
|
|
for (regex, token_type) in token_table:
|
||
|
|
m = regex.search(line)
|
||
|
|
if m:
|
||
|
|
# We found regex in lines
|
||
|
|
if best_match_start < 0 or m.start() < best_match_start:
|
||
|
|
best_match_start = m.start()
|
||
|
|
best_match_length = m.end() - m.start()
|
||
|
|
best_match_token_type = token_type
|
||
|
|
|
||
|
|
if best_match_start < 0:
|
||
|
|
return None
|
||
|
|
|
||
|
|
return (best_match_start, best_match_length, best_match_token_type)
|
||
|
|
|
||
|
|
|
||
|
|
def FindFirst(lines, token_table, cursor):
|
||
|
|
"""Finds the first occurrence of any string in strings in lines."""
|
||
|
|
|
||
|
|
start = cursor.Clone()
|
||
|
|
cur_line_number = cursor.line
|
||
|
|
for line in lines[start.line:]:
|
||
|
|
if cur_line_number == start.line:
|
||
|
|
line = line[start.column:]
|
||
|
|
m = FindFirstInLine(line, token_table)
|
||
|
|
if m:
|
||
|
|
# We found a regex in line.
|
||
|
|
(start_column, length, token_type) = m
|
||
|
|
if cur_line_number == start.line:
|
||
|
|
start_column += start.column
|
||
|
|
found_start = Cursor(cur_line_number, start_column)
|
||
|
|
found_end = found_start + length
|
||
|
|
return MakeToken(lines, found_start, found_end, token_type)
|
||
|
|
cur_line_number += 1
|
||
|
|
# We failed to find str in lines
|
||
|
|
return None
|
||
|
|
|
||
|
|
|
||
|
|
def SubString(lines, start, end):
|
||
|
|
"""Returns a substring in lines."""
|
||
|
|
|
||
|
|
if end == Eof():
|
||
|
|
end = Cursor(len(lines) - 1, len(lines[-1]))
|
||
|
|
|
||
|
|
if start >= end:
|
||
|
|
return ''
|
||
|
|
|
||
|
|
if start.line == end.line:
|
||
|
|
return lines[start.line][start.column:end.column]
|
||
|
|
|
||
|
|
result_lines = ([lines[start.line][start.column:]] +
|
||
|
|
lines[start.line + 1:end.line] +
|
||
|
|
[lines[end.line][:end.column]])
|
||
|
|
return ''.join(result_lines)
|
||
|
|
|
||
|
|
|
||
|
|
def StripMetaComments(str):
|
||
|
|
"""Strip meta comments from each line in the given string."""
|
||
|
|
|
||
|
|
# First, completely remove lines containing nothing but a meta
|
||
|
|
# comment, including the trailing \n.
|
||
|
|
str = re.sub(r'^\s*\$\$.*\n', '', str)
|
||
|
|
|
||
|
|
# Then, remove meta comments from contentful lines.
|
||
|
|
return re.sub(r'\s*\$\$.*', '', str)
|
||
|
|
|
||
|
|
|
||
|
|
def MakeToken(lines, start, end, token_type):
|
||
|
|
"""Creates a new instance of Token."""
|
||
|
|
|
||
|
|
return Token(start, end, SubString(lines, start, end), token_type)
|
||
|
|
|
||
|
|
|
||
|
|
def ParseToken(lines, pos, regex, token_type):
|
||
|
|
line = lines[pos.line][pos.column:]
|
||
|
|
m = regex.search(line)
|
||
|
|
if m and not m.start():
|
||
|
|
return MakeToken(lines, pos, pos + m.end(), token_type)
|
||
|
|
else:
|
||
|
|
print 'ERROR: %s expected at %s.' % (token_type, pos)
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
|
||
|
|
ID_REGEX = re.compile(r'[_A-Za-z]\w*')
|
||
|
|
EQ_REGEX = re.compile(r'=')
|
||
|
|
REST_OF_LINE_REGEX = re.compile(r'.*?(?=$|\$\$)')
|
||
|
|
OPTIONAL_WHITE_SPACES_REGEX = re.compile(r'\s*')
|
||
|
|
WHITE_SPACE_REGEX = re.compile(r'\s')
|
||
|
|
DOT_DOT_REGEX = re.compile(r'\.\.')
|
||
|
|
|
||
|
|
|
||
|
|
def Skip(lines, pos, regex):
|
||
|
|
line = lines[pos.line][pos.column:]
|
||
|
|
m = re.search(regex, line)
|
||
|
|
if m and not m.start():
|
||
|
|
return pos + m.end()
|
||
|
|
else:
|
||
|
|
return pos
|
||
|
|
|
||
|
|
|
||
|
|
def SkipUntil(lines, pos, regex, token_type):
|
||
|
|
line = lines[pos.line][pos.column:]
|
||
|
|
m = re.search(regex, line)
|
||
|
|
if m:
|
||
|
|
return pos + m.start()
|
||
|
|
else:
|
||
|
|
print ('ERROR: %s expected on line %s after column %s.' %
|
||
|
|
(token_type, pos.line + 1, pos.column))
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
|
||
|
|
def ParseExpTokenInParens(lines, pos):
|
||
|
|
def ParseInParens(pos):
|
||
|
|
pos = Skip(lines, pos, OPTIONAL_WHITE_SPACES_REGEX)
|
||
|
|
pos = Skip(lines, pos, r'\(')
|
||
|
|
pos = Parse(pos)
|
||
|
|
pos = Skip(lines, pos, r'\)')
|
||
|
|
return pos
|
||
|
|
|
||
|
|
def Parse(pos):
|
||
|
|
pos = SkipUntil(lines, pos, r'\(|\)', ')')
|
||
|
|
if SubString(lines, pos, pos + 1) == '(':
|
||
|
|
pos = Parse(pos + 1)
|
||
|
|
pos = Skip(lines, pos, r'\)')
|
||
|
|
return Parse(pos)
|
||
|
|
else:
|
||
|
|
return pos
|
||
|
|
|
||
|
|
start = pos.Clone()
|
||
|
|
pos = ParseInParens(pos)
|
||
|
|
return MakeToken(lines, start, pos, 'exp')
|
||
|
|
|
||
|
|
|
||
|
|
def RStripNewLineFromToken(token):
|
||
|
|
if token.value.endswith('\n'):
|
||
|
|
return Token(token.start, token.end, token.value[:-1], token.token_type)
|
||
|
|
else:
|
||
|
|
return token
|
||
|
|
|
||
|
|
|
||
|
|
def TokenizeLines(lines, pos):
|
||
|
|
while True:
|
||
|
|
found = FindFirst(lines, TOKEN_TABLE, pos)
|
||
|
|
if not found:
|
||
|
|
yield MakeToken(lines, pos, Eof(), 'code')
|
||
|
|
return
|
||
|
|
|
||
|
|
if found.start == pos:
|
||
|
|
prev_token = None
|
||
|
|
prev_token_rstripped = None
|
||
|
|
else:
|
||
|
|
prev_token = MakeToken(lines, pos, found.start, 'code')
|
||
|
|
prev_token_rstripped = RStripNewLineFromToken(prev_token)
|
||
|
|
|
||
|
|
if found.token_type == '$var':
|
||
|
|
if prev_token_rstripped:
|
||
|
|
yield prev_token_rstripped
|
||
|
|
yield found
|
||
|
|
id_token = ParseToken(lines, found.end, ID_REGEX, 'id')
|
||
|
|
yield id_token
|
||
|
|
pos = Skip(lines, id_token.end, OPTIONAL_WHITE_SPACES_REGEX)
|
||
|
|
|
||
|
|
eq_token = ParseToken(lines, pos, EQ_REGEX, '=')
|
||
|
|
yield eq_token
|
||
|
|
pos = Skip(lines, eq_token.end, r'\s*')
|
||
|
|
|
||
|
|
if SubString(lines, pos, pos + 2) != '[[':
|
||
|
|
exp_token = ParseToken(lines, pos, REST_OF_LINE_REGEX, 'exp')
|
||
|
|
yield exp_token
|
||
|
|
pos = Cursor(exp_token.end.line + 1, 0)
|
||
|
|
elif found.token_type == '$for':
|
||
|
|
if prev_token_rstripped:
|
||
|
|
yield prev_token_rstripped
|
||
|
|
yield found
|
||
|
|
id_token = ParseToken(lines, found.end, ID_REGEX, 'id')
|
||
|
|
yield id_token
|
||
|
|
pos = Skip(lines, id_token.end, WHITE_SPACE_REGEX)
|
||
|
|
elif found.token_type == '$range':
|
||
|
|
if prev_token_rstripped:
|
||
|
|
yield prev_token_rstripped
|
||
|
|
yield found
|
||
|
|
id_token = ParseToken(lines, found.end, ID_REGEX, 'id')
|
||
|
|
yield id_token
|
||
|
|
pos = Skip(lines, id_token.end, OPTIONAL_WHITE_SPACES_REGEX)
|
||
|
|
|
||
|
|
dots_pos = SkipUntil(lines, pos, DOT_DOT_REGEX, '..')
|
||
|
|
yield MakeToken(lines, pos, dots_pos, 'exp')
|
||
|
|
yield MakeToken(lines, dots_pos, dots_pos + 2, '..')
|
||
|
|
pos = dots_pos + 2
|
||
|
|
new_pos = Cursor(pos.line + 1, 0)
|
||
|
|
yield MakeToken(lines, pos, new_pos, 'exp')
|
||
|
|
pos = new_pos
|
||
|
|
elif found.token_type == '$':
|
||
|
|
if prev_token:
|
||
|
|
yield prev_token
|
||
|
|
yield found
|
||
|
|
exp_token = ParseExpTokenInParens(lines, found.end)
|
||
|
|
yield exp_token
|
||
|
|
pos = exp_token.end
|
||
|
|
elif (found.token_type == ']]' or found.token_type == '$if' or
|
||
|
|
found.token_type == '$elif' or found.token_type == '$else'):
|
||
|
|
if prev_token_rstripped:
|
||
|
|
yield prev_token_rstripped
|
||
|
|
yield found
|
||
|
|
pos = found.end
|
||
|
|
else:
|
||
|
|
if prev_token:
|
||
|
|
yield prev_token
|
||
|
|
yield found
|
||
|
|
pos = found.end
|
||
|
|
|
||
|
|
|
||
|
|
def Tokenize(s):
|
||
|
|
"""A generator that yields the tokens in the given string."""
|
||
|
|
if s != '':
|
||
|
|
lines = s.splitlines(True)
|
||
|
|
for token in TokenizeLines(lines, Cursor(0, 0)):
|
||
|
|
yield token
|
||
|
|
|
||
|
|
|
||
|
|
class CodeNode:
|
||
|
|
def __init__(self, atomic_code_list=None):
|
||
|
|
self.atomic_code = atomic_code_list
|
||
|
|
|
||
|
|
|
||
|
|
class VarNode:
|
||
|
|
def __init__(self, identifier=None, atomic_code=None):
|
||
|
|
self.identifier = identifier
|
||
|
|
self.atomic_code = atomic_code
|
||
|
|
|
||
|
|
|
||
|
|
class RangeNode:
|
||
|
|
def __init__(self, identifier=None, exp1=None, exp2=None):
|
||
|
|
self.identifier = identifier
|
||
|
|
self.exp1 = exp1
|
||
|
|
self.exp2 = exp2
|
||
|
|
|
||
|
|
|
||
|
|
class ForNode:
|
||
|
|
def __init__(self, identifier=None, sep=None, code=None):
|
||
|
|
self.identifier = identifier
|
||
|
|
self.sep = sep
|
||
|
|
self.code = code
|
||
|
|
|
||
|
|
|
||
|
|
class ElseNode:
|
||
|
|
def __init__(self, else_branch=None):
|
||
|
|
self.else_branch = else_branch
|
||
|
|
|
||
|
|
|
||
|
|
class IfNode:
|
||
|
|
def __init__(self, exp=None, then_branch=None, else_branch=None):
|
||
|
|
self.exp = exp
|
||
|
|
self.then_branch = then_branch
|
||
|
|
self.else_branch = else_branch
|
||
|
|
|
||
|
|
|
||
|
|
class RawCodeNode:
|
||
|
|
def __init__(self, token=None):
|
||
|
|
self.raw_code = token
|
||
|
|
|
||
|
|
|
||
|
|
class LiteralDollarNode:
|
||
|
|
def __init__(self, token):
|
||
|
|
self.token = token
|
||
|
|
|
||
|
|
|
||
|
|
class ExpNode:
|
||
|
|
def __init__(self, token, python_exp):
|
||
|
|
self.token = token
|
||
|
|
self.python_exp = python_exp
|
||
|
|
|
||
|
|
|
||
|
|
def PopFront(a_list):
|
||
|
|
head = a_list[0]
|
||
|
|
a_list[:1] = []
|
||
|
|
return head
|
||
|
|
|
||
|
|
|
||
|
|
def PushFront(a_list, elem):
|
||
|
|
a_list[:0] = [elem]
|
||
|
|
|
||
|
|
|
||
|
|
def PopToken(a_list, token_type=None):
|
||
|
|
token = PopFront(a_list)
|
||
|
|
if token_type is not None and token.token_type != token_type:
|
||
|
|
print 'ERROR: %s expected at %s' % (token_type, token.start)
|
||
|
|
print 'ERROR: %s found instead' % (token,)
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
return token
|
||
|
|
|
||
|
|
|
||
|
|
def PeekToken(a_list):
|
||
|
|
if not a_list:
|
||
|
|
return None
|
||
|
|
|
||
|
|
return a_list[0]
|
||
|
|
|
||
|
|
|
||
|
|
def ParseExpNode(token):
|
||
|
|
python_exp = re.sub(r'([_A-Za-z]\w*)', r'self.GetValue("\1")', token.value)
|
||
|
|
return ExpNode(token, python_exp)
|
||
|
|
|
||
|
|
|
||
|
|
def ParseElseNode(tokens):
|
||
|
|
def Pop(token_type=None):
|
||
|
|
return PopToken(tokens, token_type)
|
||
|
|
|
||
|
|
next = PeekToken(tokens)
|
||
|
|
if not next:
|
||
|
|
return None
|
||
|
|
if next.token_type == '$else':
|
||
|
|
Pop('$else')
|
||
|
|
Pop('[[')
|
||
|
|
code_node = ParseCodeNode(tokens)
|
||
|
|
Pop(']]')
|
||
|
|
return code_node
|
||
|
|
elif next.token_type == '$elif':
|
||
|
|
Pop('$elif')
|
||
|
|
exp = Pop('code')
|
||
|
|
Pop('[[')
|
||
|
|
code_node = ParseCodeNode(tokens)
|
||
|
|
Pop(']]')
|
||
|
|
inner_else_node = ParseElseNode(tokens)
|
||
|
|
return CodeNode([IfNode(ParseExpNode(exp), code_node, inner_else_node)])
|
||
|
|
elif not next.value.strip():
|
||
|
|
Pop('code')
|
||
|
|
return ParseElseNode(tokens)
|
||
|
|
else:
|
||
|
|
return None
|
||
|
|
|
||
|
|
|
||
|
|
def ParseAtomicCodeNode(tokens):
|
||
|
|
def Pop(token_type=None):
|
||
|
|
return PopToken(tokens, token_type)
|
||
|
|
|
||
|
|
head = PopFront(tokens)
|
||
|
|
t = head.token_type
|
||
|
|
if t == 'code':
|
||
|
|
return RawCodeNode(head)
|
||
|
|
elif t == '$var':
|
||
|
|
id_token = Pop('id')
|
||
|
|
Pop('=')
|
||
|
|
next = PeekToken(tokens)
|
||
|
|
if next.token_type == 'exp':
|
||
|
|
exp_token = Pop()
|
||
|
|
return VarNode(id_token, ParseExpNode(exp_token))
|
||
|
|
Pop('[[')
|
||
|
|
code_node = ParseCodeNode(tokens)
|
||
|
|
Pop(']]')
|
||
|
|
return VarNode(id_token, code_node)
|
||
|
|
elif t == '$for':
|
||
|
|
id_token = Pop('id')
|
||
|
|
next_token = PeekToken(tokens)
|
||
|
|
if next_token.token_type == 'code':
|
||
|
|
sep_token = next_token
|
||
|
|
Pop('code')
|
||
|
|
else:
|
||
|
|
sep_token = None
|
||
|
|
Pop('[[')
|
||
|
|
code_node = ParseCodeNode(tokens)
|
||
|
|
Pop(']]')
|
||
|
|
return ForNode(id_token, sep_token, code_node)
|
||
|
|
elif t == '$if':
|
||
|
|
exp_token = Pop('code')
|
||
|
|
Pop('[[')
|
||
|
|
code_node = ParseCodeNode(tokens)
|
||
|
|
Pop(']]')
|
||
|
|
else_node = ParseElseNode(tokens)
|
||
|
|
return IfNode(ParseExpNode(exp_token), code_node, else_node)
|
||
|
|
elif t == '$range':
|
||
|
|
id_token = Pop('id')
|
||
|
|
exp1_token = Pop('exp')
|
||
|
|
Pop('..')
|
||
|
|
exp2_token = Pop('exp')
|
||
|
|
return RangeNode(id_token, ParseExpNode(exp1_token),
|
||
|
|
ParseExpNode(exp2_token))
|
||
|
|
elif t == '$id':
|
||
|
|
return ParseExpNode(Token(head.start + 1, head.end, head.value[1:], 'id'))
|
||
|
|
elif t == '$($)':
|
||
|
|
return LiteralDollarNode(head)
|
||
|
|
elif t == '$':
|
||
|
|
exp_token = Pop('exp')
|
||
|
|
return ParseExpNode(exp_token)
|
||
|
|
elif t == '[[':
|
||
|
|
code_node = ParseCodeNode(tokens)
|
||
|
|
Pop(']]')
|
||
|
|
return code_node
|
||
|
|
else:
|
||
|
|
PushFront(tokens, head)
|
||
|
|
return None
|
||
|
|
|
||
|
|
|
||
|
|
def ParseCodeNode(tokens):
|
||
|
|
atomic_code_list = []
|
||
|
|
while True:
|
||
|
|
if not tokens:
|
||
|
|
break
|
||
|
|
atomic_code_node = ParseAtomicCodeNode(tokens)
|
||
|
|
if atomic_code_node:
|
||
|
|
atomic_code_list.append(atomic_code_node)
|
||
|
|
else:
|
||
|
|
break
|
||
|
|
return CodeNode(atomic_code_list)
|
||
|
|
|
||
|
|
|
||
|
|
def ParseToAST(pump_src_text):
|
||
|
|
"""Convert the given Pump source text into an AST."""
|
||
|
|
tokens = list(Tokenize(pump_src_text))
|
||
|
|
code_node = ParseCodeNode(tokens)
|
||
|
|
return code_node
|
||
|
|
|
||
|
|
|
||
|
|
class Env:
|
||
|
|
def __init__(self):
|
||
|
|
self.variables = []
|
||
|
|
self.ranges = []
|
||
|
|
|
||
|
|
def Clone(self):
|
||
|
|
clone = Env()
|
||
|
|
clone.variables = self.variables[:]
|
||
|
|
clone.ranges = self.ranges[:]
|
||
|
|
return clone
|
||
|
|
|
||
|
|
def PushVariable(self, var, value):
|
||
|
|
# If value looks like an int, store it as an int.
|
||
|
|
try:
|
||
|
|
int_value = int(value)
|
||
|
|
if ('%s' % int_value) == value:
|
||
|
|
value = int_value
|
||
|
|
except Exception:
|
||
|
|
pass
|
||
|
|
self.variables[:0] = [(var, value)]
|
||
|
|
|
||
|
|
def PopVariable(self):
|
||
|
|
self.variables[:1] = []
|
||
|
|
|
||
|
|
def PushRange(self, var, lower, upper):
|
||
|
|
self.ranges[:0] = [(var, lower, upper)]
|
||
|
|
|
||
|
|
def PopRange(self):
|
||
|
|
self.ranges[:1] = []
|
||
|
|
|
||
|
|
def GetValue(self, identifier):
|
||
|
|
for (var, value) in self.variables:
|
||
|
|
if identifier == var:
|
||
|
|
return value
|
||
|
|
|
||
|
|
print 'ERROR: meta variable %s is undefined.' % (identifier,)
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
def EvalExp(self, exp):
|
||
|
|
try:
|
||
|
|
result = eval(exp.python_exp)
|
||
|
|
except Exception, e:
|
||
|
|
print 'ERROR: caught exception %s: %s' % (e.__class__.__name__, e)
|
||
|
|
print ('ERROR: failed to evaluate meta expression %s at %s' %
|
||
|
|
(exp.python_exp, exp.token.start))
|
||
|
|
sys.exit(1)
|
||
|
|
return result
|
||
|
|
|
||
|
|
def GetRange(self, identifier):
|
||
|
|
for (var, lower, upper) in self.ranges:
|
||
|
|
if identifier == var:
|
||
|
|
return (lower, upper)
|
||
|
|
|
||
|
|
print 'ERROR: range %s is undefined.' % (identifier,)
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
|
||
|
|
class Output:
|
||
|
|
def __init__(self):
|
||
|
|
self.string = ''
|
||
|
|
|
||
|
|
def GetLastLine(self):
|
||
|
|
index = self.string.rfind('\n')
|
||
|
|
if index < 0:
|
||
|
|
return ''
|
||
|
|
|
||
|
|
return self.string[index + 1:]
|
||
|
|
|
||
|
|
def Append(self, s):
|
||
|
|
self.string += s
|
||
|
|
|
||
|
|
|
||
|
|
def RunAtomicCode(env, node, output):
|
||
|
|
if isinstance(node, VarNode):
|
||
|
|
identifier = node.identifier.value.strip()
|
||
|
|
result = Output()
|
||
|
|
RunAtomicCode(env.Clone(), node.atomic_code, result)
|
||
|
|
value = result.string
|
||
|
|
env.PushVariable(identifier, value)
|
||
|
|
elif isinstance(node, RangeNode):
|
||
|
|
identifier = node.identifier.value.strip()
|
||
|
|
lower = int(env.EvalExp(node.exp1))
|
||
|
|
upper = int(env.EvalExp(node.exp2))
|
||
|
|
env.PushRange(identifier, lower, upper)
|
||
|
|
elif isinstance(node, ForNode):
|
||
|
|
identifier = node.identifier.value.strip()
|
||
|
|
if node.sep is None:
|
||
|
|
sep = ''
|
||
|
|
else:
|
||
|
|
sep = node.sep.value
|
||
|
|
(lower, upper) = env.GetRange(identifier)
|
||
|
|
for i in range(lower, upper + 1):
|
||
|
|
new_env = env.Clone()
|
||
|
|
new_env.PushVariable(identifier, i)
|
||
|
|
RunCode(new_env, node.code, output)
|
||
|
|
if i != upper:
|
||
|
|
output.Append(sep)
|
||
|
|
elif isinstance(node, RawCodeNode):
|
||
|
|
output.Append(node.raw_code.value)
|
||
|
|
elif isinstance(node, IfNode):
|
||
|
|
cond = env.EvalExp(node.exp)
|
||
|
|
if cond:
|
||
|
|
RunCode(env.Clone(), node.then_branch, output)
|
||
|
|
elif node.else_branch is not None:
|
||
|
|
RunCode(env.Clone(), node.else_branch, output)
|
||
|
|
elif isinstance(node, ExpNode):
|
||
|
|
value = env.EvalExp(node)
|
||
|
|
output.Append('%s' % (value,))
|
||
|
|
elif isinstance(node, LiteralDollarNode):
|
||
|
|
output.Append('$')
|
||
|
|
elif isinstance(node, CodeNode):
|
||
|
|
RunCode(env.Clone(), node, output)
|
||
|
|
else:
|
||
|
|
print 'BAD'
|
||
|
|
print node
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
|
||
|
|
def RunCode(env, code_node, output):
|
||
|
|
for atomic_code in code_node.atomic_code:
|
||
|
|
RunAtomicCode(env, atomic_code, output)
|
||
|
|
|
||
|
|
|
||
|
|
def IsComment(cur_line):
|
||
|
|
return '//' in cur_line
|
||
|
|
|
||
|
|
|
||
|
|
def IsInPreprocessorDirevative(prev_lines, cur_line):
|
||
|
|
if cur_line.lstrip().startswith('#'):
|
||
|
|
return True
|
||
|
|
return prev_lines != [] and prev_lines[-1].endswith('\\')
|
||
|
|
|
||
|
|
|
||
|
|
def WrapComment(line, output):
|
||
|
|
loc = line.find('//')
|
||
|
|
before_comment = line[:loc].rstrip()
|
||
|
|
if before_comment == '':
|
||
|
|
indent = loc
|
||
|
|
else:
|
||
|
|
output.append(before_comment)
|
||
|
|
indent = len(before_comment) - len(before_comment.lstrip())
|
||
|
|
prefix = indent*' ' + '// '
|
||
|
|
max_len = 80 - len(prefix)
|
||
|
|
comment = line[loc + 2:].strip()
|
||
|
|
segs = [seg for seg in re.split(r'(\w+\W*)', comment) if seg != '']
|
||
|
|
cur_line = ''
|
||
|
|
for seg in segs:
|
||
|
|
if len((cur_line + seg).rstrip()) < max_len:
|
||
|
|
cur_line += seg
|
||
|
|
else:
|
||
|
|
if cur_line.strip() != '':
|
||
|
|
output.append(prefix + cur_line.rstrip())
|
||
|
|
cur_line = seg.lstrip()
|
||
|
|
if cur_line.strip() != '':
|
||
|
|
output.append(prefix + cur_line.strip())
|
||
|
|
|
||
|
|
|
||
|
|
def WrapCode(line, line_concat, output):
|
||
|
|
indent = len(line) - len(line.lstrip())
|
||
|
|
prefix = indent*' ' # Prefix of the current line
|
||
|
|
max_len = 80 - indent - len(line_concat) # Maximum length of the current line
|
||
|
|
new_prefix = prefix + 4*' ' # Prefix of a continuation line
|
||
|
|
new_max_len = max_len - 4 # Maximum length of a continuation line
|
||
|
|
# Prefers to wrap a line after a ',' or ';'.
|
||
|
|
segs = [seg for seg in re.split(r'([^,;]+[,;]?)', line.strip()) if seg != '']
|
||
|
|
cur_line = '' # The current line without leading spaces.
|
||
|
|
for seg in segs:
|
||
|
|
# If the line is still too long, wrap at a space.
|
||
|
|
while cur_line == '' and len(seg.strip()) > max_len:
|
||
|
|
seg = seg.lstrip()
|
||
|
|
split_at = seg.rfind(' ', 0, max_len)
|
||
|
|
output.append(prefix + seg[:split_at].strip() + line_concat)
|
||
|
|
seg = seg[split_at + 1:]
|
||
|
|
prefix = new_prefix
|
||
|
|
max_len = new_max_len
|
||
|
|
|
||
|
|
if len((cur_line + seg).rstrip()) < max_len:
|
||
|
|
cur_line = (cur_line + seg).lstrip()
|
||
|
|
else:
|
||
|
|
output.append(prefix + cur_line.rstrip() + line_concat)
|
||
|
|
prefix = new_prefix
|
||
|
|
max_len = new_max_len
|
||
|
|
cur_line = seg.lstrip()
|
||
|
|
if cur_line.strip() != '':
|
||
|
|
output.append(prefix + cur_line.strip())
|
||
|
|
|
||
|
|
|
||
|
|
def WrapPreprocessorDirevative(line, output):
|
||
|
|
WrapCode(line, ' \\', output)
|
||
|
|
|
||
|
|
|
||
|
|
def WrapPlainCode(line, output):
|
||
|
|
WrapCode(line, '', output)
|
||
|
|
|
||
|
|
|
||
|
|
def IsHeaderGuardOrInclude(line):
|
||
|
|
return (re.match(r'^#(ifndef|define|endif\s*//)\s*[\w_]+\s*$', line) or
|
||
|
|
re.match(r'^#include\s', line))
|
||
|
|
|
||
|
|
|
||
|
|
def WrapLongLine(line, output):
|
||
|
|
line = line.rstrip()
|
||
|
|
if len(line) <= 80:
|
||
|
|
output.append(line)
|
||
|
|
elif IsComment(line):
|
||
|
|
if IsHeaderGuardOrInclude(line):
|
||
|
|
# The style guide made an exception to allow long header guard lines
|
||
|
|
# and includes.
|
||
|
|
output.append(line)
|
||
|
|
else:
|
||
|
|
WrapComment(line, output)
|
||
|
|
elif IsInPreprocessorDirevative(output, line):
|
||
|
|
if IsHeaderGuardOrInclude(line):
|
||
|
|
# The style guide made an exception to allow long header guard lines
|
||
|
|
# and includes.
|
||
|
|
output.append(line)
|
||
|
|
else:
|
||
|
|
WrapPreprocessorDirevative(line, output)
|
||
|
|
else:
|
||
|
|
WrapPlainCode(line, output)
|
||
|
|
|
||
|
|
|
||
|
|
def BeautifyCode(string):
|
||
|
|
lines = string.splitlines()
|
||
|
|
output = []
|
||
|
|
for line in lines:
|
||
|
|
WrapLongLine(line, output)
|
||
|
|
output2 = [line.rstrip() for line in output]
|
||
|
|
return '\n'.join(output2) + '\n'
|
||
|
|
|
||
|
|
|
||
|
|
def ConvertFromPumpSource(src_text):
|
||
|
|
"""Return the text generated from the given Pump source text."""
|
||
|
|
ast = ParseToAST(StripMetaComments(src_text))
|
||
|
|
output = Output()
|
||
|
|
RunCode(Env(), ast, output)
|
||
|
|
return BeautifyCode(output.string)
|
||
|
|
|
||
|
|
|
||
|
|
def main(argv):
|
||
|
|
if len(argv) == 1:
|
||
|
|
print __doc__
|
||
|
|
sys.exit(1)
|
||
|
|
|
||
|
|
file_path = argv[-1]
|
||
|
|
output_str = ConvertFromPumpSource(file(file_path, 'r').read())
|
||
|
|
if file_path.endswith('.pump'):
|
||
|
|
output_file_path = file_path[:-5]
|
||
|
|
else:
|
||
|
|
output_file_path = '-'
|
||
|
|
if output_file_path == '-':
|
||
|
|
print output_str,
|
||
|
|
else:
|
||
|
|
output_file = file(output_file_path, 'w')
|
||
|
|
output_file.write('// This file was GENERATED by command:\n')
|
||
|
|
output_file.write('// %s %s\n' %
|
||
|
|
(os.path.basename(__file__), os.path.basename(file_path)))
|
||
|
|
output_file.write('// DO NOT EDIT BY HAND!!!\n\n')
|
||
|
|
output_file.write(output_str)
|
||
|
|
output_file.close()
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == '__main__':
|
||
|
|
main(sys.argv)
|