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// -*- C++ -*-
/* Copyright (C) 2002-2020 Free Software Foundation, Inc.
Written by Werner Lemberg <wl@gnu.org>
This file is part of groff.
groff 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.
groff 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 this program. If not, see <http://www.gnu.org/licenses/>. */
// Convert a groff glyph name to a string containing an underscore-separated
// list of Unicode code points. For example,
//
// '-' -> '2010'
// ',c' -> '00E7'
// 'fl' -> '0066_006C'
//
// Return NULL if there is no equivalent.
const char *glyph_name_to_unicode(const char *);
// Convert a string containing an underscore-separated list of Unicode code
// points to a groff glyph name. For example,
//
// '2010' -> 'hy'
// '0066_006C' -> 'fl'
//
// Return NULL if there is no equivalent.
const char *unicode_to_glyph_name(const char *);
// Convert a string containing a precomposed Unicode character to a string
// containing an underscore-separated list of Unicode code points,
// representing its canonical decomposition. Also perform compatibility
// equivalent replacement. For example,
//
// '1F3A' -> '0399_0313_0300'
// 'FA6A' -> '983B'
//
// Return NULL if there is no equivalent.
const char *decompose_unicode(const char *);
// Test whether the given string denotes a Unicode character. It must
// be of the form 'uNNNN', obeying the following rules.
//
// - 'NNNN' must consist of at least 4 hexadecimal digits in upper case.
// - If there are more than 4 hexadecimal digits, the leading one must not
// be zero,
// - 'NNNN' must denote a valid Unicode code point (U+0000..U+10FFFF,
// excluding surrogate code points.
//
// Return a pointer to 'NNNN' (skipping the leading 'u' character) in case
// of success, NULL otherwise.
const char *check_unicode_name(const char *);
// end of unicode.h
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