emacs/etc/charsets/README

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# README file for charset mapping files in this directory.
# Copyright (C) 2003-2024 Free Software Foundation, Inc.
# Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
# National Institute of Advanced Industrial Science and Technology (AIST)
# Registration Number H13PRO009
# This file is part of GNU Emacs.
# GNU Emacs is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# GNU Emacs is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
(1) Format of mapping files
Each line contains a code point and the corresponding Unicode
character code separated by a space. Both code points and Unicode
character codes are in hexadecimal preceded by "0x". Comments may be
used, starting with "#". Code ranges may also be used, with
(inclusive) start and end code points separated by "-" followed by the
Unicode of the start of the range.
Code points for which there's no mapping to Unicode should be skipped,
i.e. their lines should be omitted.
Examples:
0xA0 0x00A0 # no-break space
0x8141-0x8143 0x4E04 # map onto a Unicode range
(2) Source of mapping files
All mapping files are generated automatically from files in the
admin/charsets directory in the Emacs source.