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c843d23a17
I wanted to add new tables for which I could find no listing anywhere, even though iconv has support for it (not core Python though), which are GEORGIAN-ACADEMY and GEORGIAN-PS. I could find info on these in libiconv source (./lib/georgian_academy.h and ./lib/georgian_ps.h), though rather than trying to read these, I thought I should just do the other way around: get back a table from the return value of iconv API (or Python decode() when relevant). So this script is able to generate tables in the format used under script/charsets/, from either Python decode() or iconv. It will be much useful!
138 lines
4.7 KiB
Python
Executable File
138 lines
4.7 KiB
Python
Executable File
#!/bin/python3
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# -*- coding: utf-8 -*-
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# ##### BEGIN LICENSE BLOCK #####
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# Version: MPL 1.1/GPL 2.0/LGPL 2.1
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#
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# The contents of this file are subject to the Mozilla Public License Version
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# 1.1 (the "License"); you may not use this file except in compliance with
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# the License. You may obtain a copy of the License at
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# http://www.mozilla.org/MPL/
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#
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# Software distributed under the License is distributed on an "AS IS" basis,
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# WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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# for the specific language governing rights and limitations under the
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# License.
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#
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# The Original Code is Mozilla Universal charset detector code.
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#
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# The Initial Developer of the Original Code is
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# Netscape Communications Corporation.
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# Portions created by the Initial Developer are Copyright (C) 2001
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# the Initial Developer. All Rights Reserved.
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#
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# Contributor(s):
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# Jehan <jehan@girinstud.io>
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#
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# Alternatively, the contents of this file may be used under the terms of
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# either the GNU General Public License Version 2 or later (the "GPL"), or
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# the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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# in which case the provisions of the GPL or the LGPL are applicable instead
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# of those above. If you wish to allow use of your version of this file only
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# under the terms of either the GPL or the LGPL, and not to allow others to
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# use your version of this file under the terms of the MPL, indicate your
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# decision by deleting the provisions above and replace them with the notice
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# and other provisions required by the GPL or the LGPL. If you do not delete
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# the provisions above, a recipient may use your version of this file under
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# the terms of any one of the MPL, the GPL or the LGPL.
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#
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# ##### END LICENSE BLOCK #####
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import optparse
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import os
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import subprocess
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import sys
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script_path = os.path.relpath(__file__)
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usage = 'Usage: {} <CHARSET-NAME>\n' \
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'\nEx: `{} ISO-8859-15`'.format(script_path, script_path)
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description = "Internal tool to generate a charset table."
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cmdline = optparse.OptionParser(usage, description = description)
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(options, charset) = cmdline.parse_args()
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if len(charset) != 1:
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sys.stderr.write("Please choose exactly one charset as argument.\n")
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exit(1)
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charset = charset[0]
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use_iconv = False
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try:
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b' '.decode(charset)
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except LookupError:
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use_iconv = True
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def get_utf8_char(bchar, charset, iconv):
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if iconv:
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try:
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call = subprocess.Popen(['iconv', '-f', charset, '-t', 'UTF-8'],
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stdin=subprocess.PIPE, stdout=subprocess.PIPE,
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stderr=subprocess.DEVNULL)
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if call.poll() is not None:
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(_, error) = call.communicate(input='')
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sys.stderr.write('Error: `iconv` ended with error "{}".\n'.format(error))
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exit(1)
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(uchar, _) = call.communicate(input=bchar)
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except FileNotFoundError:
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sys.stderr.write('Error: `iconv` is not installed.\n')
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exit(1)
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if len(uchar) > 0:
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return uchar.decode('UTF-8')
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else:
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return None
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else:
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try:
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return bchar.decode(charset)
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except UnicodeDecodeError:
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# Typical error:
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# UnicodeDecodeError: 'charmap' codec can't decode byte 0x81 in position 0: character maps to <undefined>
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# It would mean an illegal character.
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return None
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print('## Table generated by {} with {} ##'.format(script_path, 'iconv' if use_iconv else 'Python decode()'))
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print('# X0 X1 X2 X3 X4 X5 X6 X7 X8 X9 XA XB XC XD XE XF #')
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print('charmap = \\')
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sys.stdout.write('[')
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for l in range(0x10):
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sys.stdout.write('\n ')
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has_printable = False
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for c in range(0x10):
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char = bytes([c + l * 0x10])
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char = get_utf8_char(char, charset, use_iconv)
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if char is None:
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sys.stdout.write('ILL,')
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elif char.isalpha():
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sys.stdout.write('LET,')
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has_printable = True
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elif char.isdigit():
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sys.stdout.write('NUM,')
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has_printable = True
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elif char == '\n' or char == '\r':
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sys.stdout.write('RET,')
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elif char.isprintable():
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sys.stdout.write('SYM,')
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has_printable = True
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else:
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sys.stdout.write('CTR,')
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sys.stdout.write(' # {}X'.format(hex(l)[-1:].upper()))
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if has_printable:
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sys.stdout.write('\n #')
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# The line has at least one printable character. Print in comment for
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# debugging.
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for c in range(0x10):
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char = bytes([c + l * 0x10])
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char = get_utf8_char(char, charset, use_iconv)
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if char is None:
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sys.stdout.write('ILL ')
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elif char == '\n' or char == '\r':
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sys.stdout.write('RET ')
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elif char.isalpha() or char.isdigit() or char.isprintable():
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sys.stdout.write("'{}' ".format(char))
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else:
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sys.stdout.write('CTR ')
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sys.stdout.write('\n]')
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