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# Copyright Aleksey Gurtovoy 2001-2004
#
# Distributed under the Boost Software License, Version 1.0.
# (See accompanying file LICENSE_1_0.txt or copy at
# http://www.boost.org/LICENSE_1_0.txt)
#
# See http://www.boost.org/libs/mpl for documentation.
# $Source: /cvsroot/boost/boost/libs/mpl/preprocessed/pp.py,v $
# $Date: 2005/10/04 08:35:29 $
# $Revision: 1.10 $
import fileinput
import os
import re
import string
import sys
if_else = lambda a,b,c:(a and [b] or [c])[0]
max_len = 79
ident = 4
def nearest_ident_pos(text):
return (len(text)/ident) * ident
def block_format(limits, text, first_sep=' ', sep=',', need_last_ident=1 ):
if sep == ',' and string.find( text, '<' ) != -1:
sep = '%s ' % sep
words = string.split(
string.join( string.split( text ), ' ' )
, sep
)
s = ' ' * limits[0]
max_len = limits[1]
return '%s\n%s' \
% (
reduce(
lambda t,w,max_len=max_len,s=s,sep=sep:
if_else(t[1] + len(w) < max_len
, ('%s%s%s'% (t[0],t[2],w), t[1]+len(w)+len(t[2]), sep)
, ('%s\n%s%s%s'% (t[0],s,sep,w), len(s)+len(w)+len(sep), sep)
)
, words
, (s,len(s)+len(first_sep),first_sep)
)[0]
, if_else(need_last_ident,s,'')
)
def handle_args( match ):
if re.compile('^\s*(typedef|struct|static)\s+.*?$').match(match.group(0)):
return match.group(0)
return '%s'\
% block_format(
(nearest_ident_pos(match.group(1)),max_len)
, match.group(3)
, match.group(2)
, ','
, 0
)
def handle_inline_args(match):
if len(match.group(0)) < max_len:
return match.group(0)
if match.group(9) == None:
return '%s%s<\n%s>\n'\
% (
match.group(1)
, match.group(3)
, block_format(
(nearest_ident_pos(match.group(1))+ident,max_len)
, match.group(4)
)
)
return '%s%s<\n%s>\n%s%s'\
% (
match.group(1)
, match.group(3)
, block_format(
(nearest_ident_pos(match.group(1))+ident,max_len-len(match.group(9)))
, match.group(4)
)
, string.replace(match.group(1),',',' ')
, match.group(9)
)
def handle_simple_list(match):
if match.group(1) == 'template':
return match.group(0)
single_arg = re.compile('^\s*(\w|\d)+\s*$').match(match.group(2))
return if_else(single_arg,'%s<%s>','%s< %s >') %\
(
match.group(1)
, string.join(string.split(match.group(2)), '')
)
def handle_static(match):
if len(match.group(0)) < max_len:
return match.group(0)
(first_sep,sep) = if_else(string.find(match.group(0),'+') == -1, (' ',' '),(' ','+'))
return '%s%s\n%s%s' %\
(
match.group(1)
, string.join(string.split(match.group(2)), ' ')
, block_format(
(nearest_ident_pos(match.group(1))+ident,max_len)
, match.group(4)
, first_sep
, sep
)
, match.group(5)
)
def handle_typedefs(match):
if string.count(match.group(2), ';') == 1:
return match.group(0)
join_sep = ';\n%s' % match.group(1)
return '%s%s\n' \
% (
match.group(1)
, string.join(map(string.strip, string.split(match.group(2), ';')), join_sep)
)
def fix_angle_brackets( match ):
return ' '.join( ''.join( match.group(1).split( ' ' ) ) ) + match.group(3)
class pretty:
def __init__(self, name):
self.output = open(name, "w")
self.prev_line = ''
self.re_copyright_start = re.compile( r'^// Copyright .*$' )
self.re_copyright_end = re.compile( r'^// See .* for documentation.$' )
self.reading_copyright = 0
self.copyright = None
self.re_header_name_comment = re.compile(
r'^\s*//\s+\$[S]ource: /cvsroot/boost/boost/(.*?%s\.hpp),v\s*\$$'
% os.path.splitext( name )[0]
)
self.header_was_written = 0
self.re_junk = re.compile(r'^\s*(#|//[^/]|////).*$')
self.re_c_comment_start = re.compile(r'^\s*/\*.*')
self.re_c_comment_end = re.compile(r'^.*\*/\s*$')
self.inside_c_comment = 0
self.re_empty_line = re.compile(r'^\s*$')
self.re_comma = re.compile(r'(\S+)\s*,\s*')
self.re_assign = re.compile(r'(\S+[^<|^!|^>])\s*(=+)\s*(\S+)')
self.re_marked_empty_comment = re.compile(r'^\s*//\s*$')
self.re_typedef = re.compile(r'^\s+typedef\s+.*?;$')
self.re_nsl = re.compile(r'^(\s+typedef\s+.*?;|\s*(private|public):\s*|\s*{\s*|\s*(\w|\d|,)+\s*)$')
self.re_templ_decl = re.compile(r'^(\s*template\s*<\s*.*?|\s*(private|public):\s*)$')
self.re_type_const = re.compile(r'(const)\s+((unsigned|signed)?(bool|char|short|int|long))')
#self.re_templ_args = re.compile(r'^(\s*)(, | {2})((.*::.*?,?)+)\s*$')
self.re_templ_args = re.compile(r'^(\s*)(, | {2})((\s*(\w+)(\s+|::)\w+\s*.*?,?)+)\s*$')
self.re_inline_templ_args = re.compile(
r'^(\s+(,|:\s+)?|struct\s+)(\w+)\s*<((\s*(typename\s+)?\w+\s*(=\s*.*|<(\s*\w+\s*,?)+>\s*)?,?)+)\s*>\s+((struct|class).*?)?$'
)
self.re_simple_list = re.compile(r'(\w+)\s*<((\w|,| |-)+)>')
self.re_static_const = re.compile(r'(\s*)((BOOST_STATIC_CONSTANT\(\s*\w+,\s*|enum\s*\w*\s*{\s*)value\s*=)(.*?)([}|\)];)$')
self.re_typedefs = re.compile(r'(\s*)((\s*typedef\s*.*?;)+)\s*$')
self.re_fix_angle_brackets = re.compile( r'(>(\s*>)+)(,|\n$)' )
self.re_closing_curly_brace = re.compile(r'^(}|struct\s+\w+);\s*$')
self.re_namespace_scope_templ = re.compile(r'^template\s*<\s*$')
self.re_namespace = re.compile(r'^\n?namespace\s+\w+\s*{\s*\n?$')
def process(self, line):
if self.reading_copyright:
if not self.re_copyright_end.match( line ):
self.copyright += line
return
self.reading_copyright = 0
if not self.header_was_written and self.re_copyright_start.match( line ):
self.copyright = line
self.reading_copyright = 1
return
# searching for header line
if not self.header_was_written:
if self.re_header_name_comment.match( line ):
self.header_was_written = 1
match = self.re_header_name_comment.match( line )
self.output.write( \
'\n%s\n' \
'// Preprocessed version of "%s" header\n' \
'// -- DO NOT modify by hand!\n\n' \
% ( self.copyright, match.group(1) )
)
return
# skipping preprocessor directives, comments, etc.
if self.re_junk.match(line):
return
if self.inside_c_comment or self.re_c_comment_start.match(line):
self.inside_c_comment = not self.re_c_comment_end.match(line)
return
# restoring some empty lines
if self.re_templ_decl.match(line) and self.re_typedef.match(self.prev_line) \
or not self.re_empty_line.match(line) and self.re_closing_curly_brace.match(self.prev_line) \
or not self.re_empty_line.match(self.prev_line) \
and ( self.re_namespace_scope_templ.match(line) \
or self.re_namespace.match(line) and not self.re_namespace.match(self.prev_line) \
):
line = '\n%s' % line
# removing excessive empty lines
if self.re_empty_line.match(line):
if self.re_empty_line.match(self.prev_line) or not self.header_was_written:
return
# skip empty line after typedef
if self.re_nsl.match(self.prev_line):
return
# formatting
line = self.re_comma.sub( r'\1, ', line )
line = self.re_assign.sub( r'\1 \2 \3', line )
line = self.re_marked_empty_comment.sub( r'\n', line )
line = self.re_type_const.sub( r'\2 \1', line )
line = self.re_templ_args.sub( handle_args, line )
line = self.re_inline_templ_args.sub( handle_inline_args, line )
line = self.re_simple_list.sub( handle_simple_list, line)
line = self.re_static_const.sub( handle_static, line )
line = self.re_typedefs.sub( handle_typedefs, line )
line = self.re_fix_angle_brackets.sub( fix_angle_brackets, line )
# write the output
self.output.write(line)
self.prev_line = line
def main( src, dest ):
p = pretty( os.path.basename( dest ) )
for line in fileinput.input( src ):
p.process(line)
if __name__ == '__main__':
main( sys.argv[1], sys.argv[2] )
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