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| Current File : //bin/glib-mkenums |
#!/usr/bin/env /usr/bin/python
# If the code below looks horrible and unpythonic, do not panic.
#
# It is.
#
# This is a manual conversion from the original Perl script to
# Python. Improvements are welcome.
#
from __future__ import print_function, unicode_literals
import argparse
import os
import re
import sys
import tempfile
import io
import errno
import codecs
import locale
VERSION_STR = '''glib-mkenums version 2.56.1
glib-mkenums comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of glib-mkenums under the terms of
the GNU General Public License which can be found in the
GLib source package. Sources, examples and contact
information are available at http://www.gtk.org'''
# pylint: disable=too-few-public-methods
class Color:
'''ANSI Terminal colors'''
GREEN = '\033[1;32m'
BLUE = '\033[1;34m'
YELLOW = '\033[1;33m'
RED = '\033[1;31m'
END = '\033[0m'
def print_color(msg, color=Color.END, prefix='MESSAGE'):
'''Print a string with a color prefix'''
if os.isatty(sys.stderr.fileno()):
real_prefix = '{start}{prefix}{end}'.format(start=color, prefix=prefix, end=Color.END)
else:
real_prefix = prefix
print('{prefix}: {msg}'.format(prefix=real_prefix, msg=msg), file=sys.stderr)
def print_error(msg):
'''Print an error, and terminate'''
print_color(msg, color=Color.RED, prefix='ERROR')
sys.exit(1)
def print_warning(msg, fatal=False):
'''Print a warning, and optionally terminate'''
if fatal:
color = Color.RED
prefix = 'ERROR'
else:
color = Color.YELLOW
prefix = 'WARNING'
print_color(msg, color, prefix)
if fatal:
sys.exit(1)
def print_info(msg):
'''Print a message'''
print_color(msg, color=Color.GREEN, prefix='INFO')
def write_output(output):
global output_stream
print(output, file=output_stream)
# Python 2 defaults to ASCII in case stdout is redirected.
# This should make it match Python 3, which uses the locale encoding.
if sys.stdout.encoding is None:
output_stream = codecs.getwriter(
locale.getpreferredencoding())(sys.stdout)
else:
output_stream = sys.stdout
# Some source files aren't UTF-8 and the old perl version didn't care.
# Replace invalid data with a replacement character to keep things working.
# https://bugzilla.gnome.org/show_bug.cgi?id=785113#c20
def replace_and_warn(err):
# 7 characters of context either side of the offending character
print_warning('UnicodeWarning: {} at {} ({})'.format(
err.reason, err.start,
err.object[err.start - 7:err.end + 7]))
return ('?', err.end)
codecs.register_error('replace_and_warn', replace_and_warn)
# glib-mkenums.py
# Information about the current enumeration
flags = None # Is enumeration a bitmask?
option_underscore_name = '' # Overriden underscore variant of the enum name
# for example to fix the cases we don't get the
# mixed-case -> underscorized transform right.
option_lowercase_name = '' # DEPRECATED. A lower case name to use as part
# of the *_get_type() function, instead of the
# one that we guess. For instance, when an enum
# uses abnormal capitalization and we can not
# guess where to put the underscores.
seenbitshift = 0 # Have we seen bitshift operators?
enum_prefix = None # Prefix for this enumeration
enumname = '' # Name for this enumeration
enumshort = '' # $enumname without prefix
enumname_prefix = '' # prefix of $enumname
enumindex = 0 # Global enum counter
firstenum = 1 # Is this the first enumeration per file?
entries = [] # [ name, val ] for each entry
sandbox = None # sandbox for safe evaluation of expressions
output = '' # Filename to write result into
def parse_trigraph(opts):
result = {}
for opt in re.split(r'\s*,\s*', opts):
opt = re.sub(r'^\s*', '', opt)
opt = re.sub(r'\s*$', '', opt)
m = re.search(r'(\w+)(?:=(.+))?', opt)
assert m is not None
groups = m.groups()
key = groups[0]
if len(groups) > 1:
val = groups[1]
else:
val = 1
result[key] = val
return result
def parse_entries(file, file_name):
global entries, enumindex, enumname, seenbitshift, flags
looking_for_name = False
while True:
line = file.readline()
if not line:
break
line = line.strip()
# read lines until we have no open comments
while re.search(r'/\*([^*]|\*(?!/))*$', line):
line += file.readline()
# strip comments w/o options
line = re.sub(r'''/\*(?!<)
([^*]+|\*(?!/))*
\*/''', '', line, flags=re.X)
line = line.rstrip()
# skip empty lines
if len(line.strip()) == 0:
continue
if looking_for_name:
m = re.match(r'\s*(\w+)', line)
if m:
enumname = m.group(1)
return True
# Handle include files
m = re.match(r'\#include\s*<([^>]*)>', line)
if m:
newfilename = os.path.join("..", m.group(1))
newfile = io.open(newfilename, encoding="utf-8",
errors="replace_and_warn")
if not parse_entries(newfile, newfilename):
return False
else:
continue
m = re.match(r'\s*\}\s*(\w+)', line)
if m:
enumname = m.group(1)
enumindex += 1
return 1
m = re.match(r'\s*\}', line)
if m:
enumindex += 1
looking_for_name = True
continue
m = re.match(r'''\s*
(\w+)\s* # name
(?:=( # value
\s*\w+\s*\(.*\)\s* # macro with multiple args
| # OR
(?:[^,/]|/(?!\*))* # anything but a comma or comment
))?,?\s*
(?:/\*< # options
(([^*]|\*(?!/))*)
>\s*\*/)?,?
\s*$''', line, flags=re.X)
if m:
groups = m.groups()
name = groups[0]
value = None
options = None
if len(groups) > 1:
value = groups[1]
if len(groups) > 2:
options = groups[2]
if flags is None and value is not None and '<<' in value:
seenbitshift = 1
if options is not None:
options = parse_trigraph(options)
if 'skip' not in options:
entries.append((name, value, options['nick']))
else:
entries.append((name, value))
elif re.match(r's*\#', line):
pass
else:
print_warning('Failed to parse "{}" in {}'.format(line, file_name))
return False
help_epilog = '''Production text substitutions:
\u0040EnumName\u0040 PrefixTheXEnum
\u0040enum_name\u0040 prefix_the_xenum
\u0040ENUMNAME\u0040 PREFIX_THE_XENUM
\u0040ENUMSHORT\u0040 THE_XENUM
\u0040ENUMPREFIX\u0040 PREFIX
\u0040VALUENAME\u0040 PREFIX_THE_XVALUE
\u0040valuenick\u0040 the-xvalue
\u0040valuenum\u0040 the integer value (limited support, Since: 2.26)
\u0040type\u0040 either enum or flags
\u0040Type\u0040 either Enum or Flags
\u0040TYPE\u0040 either ENUM or FLAGS
\u0040filename\u0040 name of current input file
\u0040basename\u0040 base name of the current input file (Since: 2.22)
'''
# production variables:
idprefix = "" # "G", "Gtk", etc
symprefix = "" # "g", "gtk", etc, if not just lc($idprefix)
fhead = "" # output file header
fprod = "" # per input file production
ftail = "" # output file trailer
eprod = "" # per enum text (produced prior to value itarations)
vhead = "" # value header, produced before iterating over enum values
vprod = "" # value text, produced for each enum value
vtail = "" # value tail, produced after iterating over enum values
comment_tmpl = "" # comment template
def read_template_file(file):
global idprefix, symprefix, fhead, fprod, ftail, eprod, vhead, vprod, vtail, comment_tmpl
tmpl = {'file-header': fhead,
'file-production': fprod,
'file-tail': ftail,
'enumeration-production': eprod,
'value-header': vhead,
'value-production': vprod,
'value-tail': vtail,
'comment': comment_tmpl,
}
in_ = 'junk'
ifile = io.open(file, encoding="utf-8", errors="replace_and_warn")
for line in ifile:
m = re.match(r'\/\*\*\*\s+(BEGIN|END)\s+([\w-]+)\s+\*\*\*\/', line)
if m:
if in_ == 'junk' and m.group(1) == 'BEGIN' and m.group(2) in tmpl:
in_ = m.group(2)
continue
elif in_ == m.group(2) and m.group(1) == 'END' and m.group(2) in tmpl:
in_ = 'junk'
continue
else:
sys.exit("Malformed template file " + file)
if in_ != 'junk':
tmpl[in_] += line
if in_ != 'junk':
sys.exit("Malformed template file " + file)
fhead = tmpl['file-header']
fprod = tmpl['file-production']
ftail = tmpl['file-tail']
eprod = tmpl['enumeration-production']
vhead = tmpl['value-header']
vprod = tmpl['value-production']
vtail = tmpl['value-tail']
comment_tmpl = tmpl['comment']
parser = argparse.ArgumentParser(epilog=help_epilog,
formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument('--identifier-prefix', default='', dest='idprefix',
help='Identifier prefix')
parser.add_argument('--symbol-prefix', default='', dest='symprefix',
help='symbol-prefix')
parser.add_argument('--fhead', default=[], dest='fhead', action='append',
help='Output file header')
parser.add_argument('--ftail', default=[], dest='ftail', action='append',
help='Per input file production')
parser.add_argument('--fprod', default=[], dest='fprod', action='append',
help='Put out TEXT everytime a new input file is being processed.')
parser.add_argument('--eprod', default=[], dest='eprod', action='append',
help='Per enum text (produced prior to value iterations)')
parser.add_argument('--vhead', default=[], dest='vhead', action='append',
help='Value header, produced before iterating over enum values')
parser.add_argument('--vprod', default=[], dest='vprod', action='append',
help='Value text, produced for each enum value.')
parser.add_argument('--vtail', default=[], dest='vtail', action='append',
help='Value tail, produced after iterating over enum values')
parser.add_argument('--comments', default='', dest='comment_tmpl',
help='Comment structure')
parser.add_argument('--template', default='', dest='template',
help='Template file')
parser.add_argument('--output', default=None, dest='output')
parser.add_argument('--version', '-v', default=False, action='store_true', dest='version',
help='Print version informations')
parser.add_argument('args', nargs='*')
options = parser.parse_args()
if options.version:
print(VERSION_STR)
sys.exit(0)
def unescape_cmdline_args(arg):
arg = arg.replace('\\n', '\n')
arg = arg.replace('\\r', '\r')
return arg.replace('\\t', '\t')
if options.template != '':
read_template_file(options.template)
idprefix += options.idprefix
symprefix += options.symprefix
# This is a hack to maintain some semblance of backward compatibility with
# the old, Perl-based glib-mkenums. The old tool had an implicit ordering
# on the arguments and templates; each argument was parsed in order, and
# all the strings appended. This allowed developers to write:
#
# glib-mkenums \
# --fhead ... \
# --template a-template-file.c.in \
# --ftail ...
#
# And have the fhead be prepended to the file-head stanza in the template,
# as well as the ftail be appended to the file-tail stanza in the template.
# Short of throwing away ArgumentParser and going over sys.argv[] element
# by element, we can simulate that behaviour by ensuring some ordering in
# how we build the template strings:
#
# - the head stanzas are always prepended to the template
# - the prod stanzas are always appended to the template
# - the tail stanzas are always appended to the template
#
# Within each instance of the command line argument, we append each value
# to the array in the order in which it appears on the command line.
fhead = ''.join([unescape_cmdline_args(x) for x in options.fhead]) + fhead
vhead = ''.join([unescape_cmdline_args(x) for x in options.vhead]) + vhead
fprod += ''.join([unescape_cmdline_args(x) for x in options.fprod])
eprod += ''.join([unescape_cmdline_args(x) for x in options.eprod])
vprod += ''.join([unescape_cmdline_args(x) for x in options.vprod])
ftail = ftail + ''.join([unescape_cmdline_args(x) for x in options.ftail])
vtail = vtail + ''.join([unescape_cmdline_args(x) for x in options.vtail])
if options.comment_tmpl != '':
comment_tmpl = unescape_cmdline_args(options.comment_tmpl)
elif comment_tmpl == "":
# default to C-style comments
comment_tmpl = "/* \u0040comment\u0040 */"
output = options.output
if output is not None:
(out_dir, out_fn) = os.path.split(options.output)
out_suffix = '_' + os.path.splitext(out_fn)[1]
if out_dir == '':
out_dir = '.'
fd, filename = tempfile.mkstemp(dir=out_dir)
os.close(fd)
tmpfile = io.open(filename, "w", encoding="utf-8")
output_stream = tmpfile
else:
tmpfile = None
# put auto-generation comment
comment = comment_tmpl.replace('\u0040comment\u0040',
'This file is generated by glib-mkenums, do '
'not modify it. This code is licensed under '
'the same license as the containing project. '
'Note that it links to GLib, so must comply '
'with the LGPL linking clauses.')
write_output("\n" + comment + '\n')
def replace_specials(prod):
prod = prod.replace(r'\\a', r'\a')
prod = prod.replace(r'\\b', r'\b')
prod = prod.replace(r'\\t', r'\t')
prod = prod.replace(r'\\n', r'\n')
prod = prod.replace(r'\\f', r'\f')
prod = prod.replace(r'\\r', r'\r')
prod = prod.rstrip()
return prod
if len(fhead) > 0:
prod = fhead
base = os.path.basename(options.args[0])
prod = prod.replace('\u0040filename\u0040', options.args[0])
prod = prod.replace('\u0040basename\u0040', base)
prod = replace_specials(prod)
write_output(prod)
def process_file(curfilename):
global entries, flags, seenbitshift, enum_prefix
firstenum = True
try:
curfile = io.open(curfilename, encoding="utf-8",
errors="replace_and_warn")
except IOError as e:
if e.errno == errno.ENOENT:
print_warning('No file "{}" found.'.format(curfilename))
return
raise
while True:
line = curfile.readline()
if not line:
break
line = line.strip()
# read lines until we have no open comments
while re.search(r'/\*([^*]|\*(?!/))*$', line):
line += curfile.readline()
# strip comments w/o options
line = re.sub(r'''/\*(?!<)
([^*]+|\*(?!/))*
\*/''', '', line)
# ignore forward declarations
if re.match(r'\s*typedef\s+enum.*;', line):
continue
m = re.match(r'''\s*typedef\s+enum\s*[_A-Za-z]*[_A-Za-z0-9]*\s*
({)?\s*
(?:/\*<
(([^*]|\*(?!/))*)
>\s*\*/)?
\s*({)?''', line, flags=re.X)
if m:
groups = m.groups()
if len(groups) >= 2 and groups[1] is not None:
options = parse_trigraph(groups[1])
if 'skip' in options:
continue
enum_prefix = options.get('prefix', None)
flags = options.get('flags', None)
if 'flags' in options:
if flags is None:
flags = 1
else:
flags = int(flags)
option_lowercase_name = options.get('lowercase_name', None)
option_underscore_name = options.get('underscore_name', None)
else:
enum_prefix = None
flags = None
option_lowercase_name = None
option_underscore_name = None
if option_lowercase_name is not None:
if option_underscore_name is not None:
print_warning("lowercase_name overriden with underscore_name")
option_lowercase_name = None
else:
print_warning("lowercase_name is deprecated, use underscore_name")
# Didn't have trailing '{' look on next lines
if groups[0] is None and (len(groups) < 4 or groups[3] is None):
while True:
line = curfile.readline()
if not line:
print_error("Syntax error when looking for opening { in enum")
if re.match(r'\s*\{', line):
break
seenbitshift = 0
entries = []
# Now parse the entries
parse_entries(curfile, curfilename)
# figure out if this was a flags or enums enumeration
if flags is None:
flags = seenbitshift
# Autogenerate a prefix
if enum_prefix is None:
for entry in entries:
if len(entry) < 3 or entry[2] is None:
name = entry[0]
if enum_prefix is not None:
enum_prefix = os.path.commonprefix([name, enum_prefix])
else:
enum_prefix = name
if enum_prefix is None:
enum_prefix = ""
else:
# Trim so that it ends in an underscore
enum_prefix = re.sub(r'_[^_]*$', '_', enum_prefix)
else:
# canonicalize user defined prefixes
enum_prefix = enum_prefix.upper()
enum_prefix = enum_prefix.replace('-', '_')
enum_prefix = re.sub(r'(.*)([^_])$', r'\1\2_', enum_prefix)
fixed_entries = []
for e in entries:
name = e[0]
num = e[1]
if len(e) < 3 or e[2] is None:
nick = re.sub(r'^' + enum_prefix, '', name)
nick = nick.replace('_', '-').lower()
e = (name, num, nick)
fixed_entries.append(e)
entries = fixed_entries
# Spit out the output
if option_underscore_name is not None:
enumlong = option_underscore_name.upper()
enumsym = option_underscore_name.lower()
enumshort = re.sub(r'^[A-Z][A-Z0-9]*_', '', enumlong)
enumname_prefix = re.sub('_' + enumshort + '$', '', enumlong)
elif symprefix == '' and idprefix == '':
# enumname is e.g. GMatchType
enspace = re.sub(r'^([A-Z][a-z]*).*$', r'\1', enumname)
enumshort = re.sub(r'^[A-Z][a-z]*', '', enumname)
enumshort = re.sub(r'([^A-Z])([A-Z])', r'\1_\2', enumshort)
enumshort = re.sub(r'([A-Z][A-Z])([A-Z][0-9a-z])', r'\1_\2', enumshort)
enumshort = enumshort.upper()
enumname_prefix = re.sub(r'^([A-Z][a-z]*).*$', r'\1', enumname).upper()
enumlong = enspace.upper() + "_" + enumshort
enumsym = enspace.lower() + "_" + enumshort.lower()
if option_lowercase_name is not None:
enumsym = option_lowercase_name
else:
enumshort = enumname
if idprefix:
enumshort = re.sub(r'^' + idprefix, '', enumshort)
else:
enumshort = re.sub(r'/^[A-Z][a-z]*', '', enumshort)
enumshort = re.sub(r'([^A-Z])([A-Z])', r'\1_\2', enumshort)
enumshort = re.sub(r'([A-Z][A-Z])([A-Z][0-9a-z])', r'\1_\2', enumshort)
enumshort = enumshort.upper()
if symprefix:
enumname_prefix = symprefix.upper()
else:
enumname_prefix = idprefix.upper()
enumlong = enumname_prefix + "_" + enumshort
enumsym = enumlong.lower()
if firstenum:
firstenum = False
if len(fprod) > 0:
prod = fprod
base = os.path.basename(curfilename)
prod = prod.replace('\u0040filename\u0040', curfilename)
prod = prod.replace('\u0040basename\u0040', base)
prod = replace_specials(prod)
write_output(prod)
if len(eprod) > 0:
prod = eprod
prod = prod.replace('\u0040enum_name\u0040', enumsym)
prod = prod.replace('\u0040EnumName\u0040', enumname)
prod = prod.replace('\u0040ENUMSHORT\u0040', enumshort)
prod = prod.replace('\u0040ENUMNAME\u0040', enumlong)
prod = prod.replace('\u0040ENUMPREFIX\u0040', enumname_prefix)
if flags:
prod = prod.replace('\u0040type\u0040', 'flags')
else:
prod = prod.replace('\u0040type\u0040', 'enum')
if flags:
prod = prod.replace('\u0040Type\u0040', 'Flags')
else:
prod = prod.replace('\u0040Type\u0040', 'Enum')
if flags:
prod = prod.replace('\u0040TYPE\u0040', 'FLAGS')
else:
prod = prod.replace('\u0040TYPE\u0040', 'ENUM')
prod = replace_specials(prod)
write_output(prod)
if len(vhead) > 0:
prod = vhead
prod = prod.replace('\u0040enum_name\u0040', enumsym)
prod = prod.replace('\u0040EnumName\u0040', enumname)
prod = prod.replace('\u0040ENUMSHORT\u0040', enumshort)
prod = prod.replace('\u0040ENUMNAME\u0040', enumlong)
prod = prod.replace('\u0040ENUMPREFIX\u0040', enumname_prefix)
if flags:
prod = prod.replace('\u0040type\u0040', 'flags')
else:
prod = prod.replace('\u0040type\u0040', 'enum')
if flags:
prod = prod.replace('\u0040Type\u0040', 'Flags')
else:
prod = prod.replace('\u0040Type\u0040', 'Enum')
if flags:
prod = prod.replace('\u0040TYPE\u0040', 'FLAGS')
else:
prod = prod.replace('\u0040TYPE\u0040', 'ENUM')
prod = replace_specials(prod)
write_output(prod)
if len(vprod) > 0:
prod = vprod
next_num = 0
prod = replace_specials(prod)
for name, num, nick in entries:
tmp_prod = prod
if '\u0040valuenum\u0040' in prod:
# only attempt to eval the value if it is requested
# this prevents us from throwing errors otherwise
if num is not None:
# use sandboxed evaluation as a reasonable
# approximation to C constant folding
inum = eval(num, {}, {})
# make sure it parsed to an integer
if not isinstance(inum, int):
sys.exit("Unable to parse enum value '%s'" % num)
num = inum
else:
num = next_num
tmp_prod = tmp_prod.replace('\u0040valuenum\u0040', str(num))
next_num = int(num) + 1
tmp_prod = tmp_prod.replace('\u0040VALUENAME\u0040', name)
tmp_prod = tmp_prod.replace('\u0040valuenick\u0040', nick)
if flags:
tmp_prod = tmp_prod.replace('\u0040type\u0040', 'flags')
else:
tmp_prod = tmp_prod.replace('\u0040type\u0040', 'enum')
if flags:
tmp_prod = tmp_prod.replace('\u0040Type\u0040', 'Flags')
else:
tmp_prod = tmp_prod.replace('\u0040Type\u0040', 'Enum')
if flags:
tmp_prod = tmp_prod.replace('\u0040TYPE\u0040', 'FLAGS')
else:
tmp_prod = tmp_prod.replace('\u0040TYPE\u0040', 'ENUM')
tmp_prod = tmp_prod.rstrip()
write_output(tmp_prod)
if len(vtail) > 0:
prod = vtail
prod = prod.replace('\u0040enum_name\u0040', enumsym)
prod = prod.replace('\u0040EnumName\u0040', enumname)
prod = prod.replace('\u0040ENUMSHORT\u0040', enumshort)
prod = prod.replace('\u0040ENUMNAME\u0040', enumlong)
prod = prod.replace('\u0040ENUMPREFIX\u0040', enumname_prefix)
if flags:
prod = prod.replace('\u0040type\u0040', 'flags')
else:
prod = prod.replace('\u0040type\u0040', 'enum')
if flags:
prod = prod.replace('\u0040Type\u0040', 'Flags')
else:
prod = prod.replace('\u0040Type\u0040', 'Enum')
if flags:
prod = prod.replace('\u0040TYPE\u0040', 'FLAGS')
else:
prod = prod.replace('\u0040TYPE\u0040', 'ENUM')
prod = replace_specials(prod)
write_output(prod)
for fname in sorted(options.args):
process_file(fname)
if len(ftail) > 0:
prod = ftail
base = os.path.basename(options.args[-1]) # FIXME, wrong
prod = prod.replace('\u0040filename\u0040', 'ARGV') # wrong too
prod = prod.replace('\u0040basename\u0040', base)
prod = replace_specials(prod)
write_output(prod)
# put auto-generation comment
comment = comment_tmpl
comment = comment.replace('\u0040comment\u0040', 'Generated data ends here')
write_output("\n" + comment + "\n")
if tmpfile is not None:
tmpfilename = tmpfile.name
tmpfile.close()
try:
os.unlink(options.output)
except OSError as error:
if error.errno != errno.ENOENT:
raise error
os.rename(tmpfilename, options.output)