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                <textarea name="file_content" style="width:100%; height:400px; font-family:monospace;">/* SPDX-License-Identifier: GPL-2.0+ WITH Linux-syscall-note */
/*
 * Copyright (c) 2005 Henk Vergonet &lt;Henk.Vergonet@gmail.com&gt;
 *
 * This program 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 2 of
 * the License, or (at your option) any later version.
 *
 * This program 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, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

#ifndef MAP_TO_7SEGMENT_H
#define MAP_TO_7SEGMENT_H

/* This file provides translation primitives and tables for the conversion
 * of (ASCII) characters to a 7-segments notation.
 *
 * The 7 segment&#039;s wikipedia notation below is used as standard.
 * See: http://en.wikipedia.org/wiki/Seven_segment_display
 *
 * Notation:	+-a-+
 *		f   b
 *		+-g-+
 *		e   c
 *		+-d-+
 *
 * Usage:
 *
 *   Register a map variable, and fill it with a character set:
 *	static SEG7_DEFAULT_MAP(map_seg7);
 *
 *
 *   Then use for conversion:
 *	seg7 = map_to_seg7(&amp;map_seg7, some_char);
 *	...
 *
 * In device drivers it is recommended, if required, to make the char map
 * accessible via the sysfs interface using the following scheme:
 *
 * static ssize_t show_map(struct device *dev, char *buf) {
 *	memcpy(buf, &amp;map_seg7, sizeof(map_seg7));
 *	return sizeof(map_seg7);
 * }
 * static ssize_t store_map(struct device *dev, const char *buf, size_t cnt) {
 *	if(cnt != sizeof(map_seg7))
 *		return -EINVAL;
 *	memcpy(&amp;map_seg7, buf, cnt);
 *	return cnt;
 * }
 * static DEVICE_ATTR(map_seg7, PERMS_RW, show_map, store_map);
 *
 * History:
 * 2005-05-31	RFC linux-kernel@vger.kernel.org
 */
#include &lt;linux/errno.h&gt;


#define BIT_SEG7_A		0
#define BIT_SEG7_B		1
#define BIT_SEG7_C		2
#define BIT_SEG7_D		3
#define BIT_SEG7_E		4
#define BIT_SEG7_F		5
#define BIT_SEG7_G		6
#define BIT_SEG7_RESERVED	7

struct seg7_conversion_map {
	unsigned char	table[128];
};

static __inline__ int map_to_seg7(struct seg7_conversion_map *map, int c)
{
	return c &gt;= 0 &amp;&amp; c &lt; sizeof(map-&gt;table) ? map-&gt;table[c] : -EINVAL;
}

#define SEG7_CONVERSION_MAP(_name, _map)	\
	struct seg7_conversion_map _name = { .table = { _map } }

/*
 * It is recommended to use a facility that allows user space to redefine
 * custom character sets for LCD devices. Please use a sysfs interface
 * as described above.
 */
#define MAP_TO_SEG7_SYSFS_FILE	&quot;map_seg7&quot;

/*******************************************************************************
 * ASCII conversion table
 ******************************************************************************/

#define _SEG7(l,a,b,c,d,e,f,g)	\
      (	a&lt;&lt;BIT_SEG7_A |	b&lt;&lt;BIT_SEG7_B |	c&lt;&lt;BIT_SEG7_C |	d&lt;&lt;BIT_SEG7_D |	\
	e&lt;&lt;BIT_SEG7_E |	f&lt;&lt;BIT_SEG7_F |	g&lt;&lt;BIT_SEG7_G )

#define _MAP_0_32_ASCII_SEG7_NON_PRINTABLE	\
	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

#define _MAP_33_47_ASCII_SEG7_SYMBOL		\
 _SEG7(&#039;!&#039;,0,0,0,0,1,1,0), _SEG7(&#039;&quot;&#039;,0,1,0,0,0,1,0), _SEG7(&#039;#&#039;,0,1,1,0,1,1,0),\
 _SEG7(&#039;$&#039;,1,0,1,1,0,1,1), _SEG7(&#039;%&#039;,0,0,1,0,0,1,0), _SEG7(&#039;&amp;&#039;,1,0,1,1,1,1,1),\
 _SEG7(&#039;\&#039;&#039;,0,0,0,0,0,1,0),_SEG7(&#039;(&#039;,1,0,0,1,1,1,0), _SEG7(&#039;)&#039;,1,1,1,1,0,0,0),\
 _SEG7(&#039;*&#039;,0,1,1,0,1,1,1), _SEG7(&#039;+&#039;,0,1,1,0,0,0,1), _SEG7(&#039;,&#039;,0,0,0,0,1,0,0),\
 _SEG7(&#039;-&#039;,0,0,0,0,0,0,1), _SEG7(&#039;.&#039;,0,0,0,0,1,0,0), _SEG7(&#039;/&#039;,0,1,0,0,1,0,1),

#define _MAP_48_57_ASCII_SEG7_NUMERIC		\
 _SEG7(&#039;0&#039;,1,1,1,1,1,1,0), _SEG7(&#039;1&#039;,0,1,1,0,0,0,0), _SEG7(&#039;2&#039;,1,1,0,1,1,0,1),\
 _SEG7(&#039;3&#039;,1,1,1,1,0,0,1), _SEG7(&#039;4&#039;,0,1,1,0,0,1,1), _SEG7(&#039;5&#039;,1,0,1,1,0,1,1),\
 _SEG7(&#039;6&#039;,1,0,1,1,1,1,1), _SEG7(&#039;7&#039;,1,1,1,0,0,0,0), _SEG7(&#039;8&#039;,1,1,1,1,1,1,1),\
 _SEG7(&#039;9&#039;,1,1,1,1,0,1,1),

#define _MAP_58_64_ASCII_SEG7_SYMBOL		\
 _SEG7(&#039;:&#039;,0,0,0,1,0,0,1), _SEG7(&#039;;&#039;,0,0,0,1,0,0,1), _SEG7(&#039;&lt;&#039;,1,0,0,0,0,1,1),\
 _SEG7(&#039;=&#039;,0,0,0,1,0,0,1), _SEG7(&#039;&gt;&#039;,1,1,0,0,0,0,1), _SEG7(&#039;?&#039;,1,1,1,0,0,1,0),\
 _SEG7(&#039;@&#039;,1,1,0,1,1,1,1),

#define _MAP_65_90_ASCII_SEG7_ALPHA_UPPR	\
 _SEG7(&#039;A&#039;,1,1,1,0,1,1,1), _SEG7(&#039;B&#039;,1,1,1,1,1,1,1), _SEG7(&#039;C&#039;,1,0,0,1,1,1,0),\
 _SEG7(&#039;D&#039;,1,1,1,1,1,1,0), _SEG7(&#039;E&#039;,1,0,0,1,1,1,1), _SEG7(&#039;F&#039;,1,0,0,0,1,1,1),\
 _SEG7(&#039;G&#039;,1,1,1,1,0,1,1), _SEG7(&#039;H&#039;,0,1,1,0,1,1,1), _SEG7(&#039;I&#039;,0,1,1,0,0,0,0),\
 _SEG7(&#039;J&#039;,0,1,1,1,0,0,0), _SEG7(&#039;K&#039;,0,1,1,0,1,1,1), _SEG7(&#039;L&#039;,0,0,0,1,1,1,0),\
 _SEG7(&#039;M&#039;,1,1,1,0,1,1,0), _SEG7(&#039;N&#039;,1,1,1,0,1,1,0), _SEG7(&#039;O&#039;,1,1,1,1,1,1,0),\
 _SEG7(&#039;P&#039;,1,1,0,0,1,1,1), _SEG7(&#039;Q&#039;,1,1,1,1,1,1,0), _SEG7(&#039;R&#039;,1,1,1,0,1,1,1),\
 _SEG7(&#039;S&#039;,1,0,1,1,0,1,1), _SEG7(&#039;T&#039;,0,0,0,1,1,1,1), _SEG7(&#039;U&#039;,0,1,1,1,1,1,0),\
 _SEG7(&#039;V&#039;,0,1,1,1,1,1,0), _SEG7(&#039;W&#039;,0,1,1,1,1,1,1), _SEG7(&#039;X&#039;,0,1,1,0,1,1,1),\
 _SEG7(&#039;Y&#039;,0,1,1,0,0,1,1), _SEG7(&#039;Z&#039;,1,1,0,1,1,0,1),

#define _MAP_91_96_ASCII_SEG7_SYMBOL		\
 _SEG7(&#039;[&#039;,1,0,0,1,1,1,0), _SEG7(&#039;\\&#039;,0,0,1,0,0,1,1),_SEG7(&#039;]&#039;,1,1,1,1,0,0,0),\
 _SEG7(&#039;^&#039;,1,1,0,0,0,1,0), _SEG7(&#039;_&#039;,0,0,0,1,0,0,0), _SEG7(&#039;`&#039;,0,1,0,0,0,0,0),

#define _MAP_97_122_ASCII_SEG7_ALPHA_LOWER	\
 _SEG7(&#039;A&#039;,1,1,1,0,1,1,1), _SEG7(&#039;b&#039;,0,0,1,1,1,1,1), _SEG7(&#039;c&#039;,0,0,0,1,1,0,1),\
 _SEG7(&#039;d&#039;,0,1,1,1,1,0,1), _SEG7(&#039;E&#039;,1,0,0,1,1,1,1), _SEG7(&#039;F&#039;,1,0,0,0,1,1,1),\
 _SEG7(&#039;G&#039;,1,1,1,1,0,1,1), _SEG7(&#039;h&#039;,0,0,1,0,1,1,1), _SEG7(&#039;i&#039;,0,0,1,0,0,0,0),\
 _SEG7(&#039;j&#039;,0,0,1,1,0,0,0), _SEG7(&#039;k&#039;,0,0,1,0,1,1,1), _SEG7(&#039;L&#039;,0,0,0,1,1,1,0),\
 _SEG7(&#039;M&#039;,1,1,1,0,1,1,0), _SEG7(&#039;n&#039;,0,0,1,0,1,0,1), _SEG7(&#039;o&#039;,0,0,1,1,1,0,1),\
 _SEG7(&#039;P&#039;,1,1,0,0,1,1,1), _SEG7(&#039;q&#039;,1,1,1,0,0,1,1), _SEG7(&#039;r&#039;,0,0,0,0,1,0,1),\
 _SEG7(&#039;S&#039;,1,0,1,1,0,1,1), _SEG7(&#039;T&#039;,0,0,0,1,1,1,1), _SEG7(&#039;u&#039;,0,0,1,1,1,0,0),\
 _SEG7(&#039;v&#039;,0,0,1,1,1,0,0), _SEG7(&#039;W&#039;,0,1,1,1,1,1,1), _SEG7(&#039;X&#039;,0,1,1,0,1,1,1),\
 _SEG7(&#039;y&#039;,0,1,1,1,0,1,1), _SEG7(&#039;Z&#039;,1,1,0,1,1,0,1),

#define _MAP_123_126_ASCII_SEG7_SYMBOL		\
 _SEG7(&#039;{&#039;,1,0,0,1,1,1,0), _SEG7(&#039;|&#039;,0,0,0,0,1,1,0), _SEG7(&#039;}&#039;,1,1,1,1,0,0,0),\
 _SEG7(&#039;~&#039;,1,0,0,0,0,0,0),

/* Maps */

/* This set tries to map as close as possible to the visible characteristics
 * of the ASCII symbol, lowercase and uppercase letters may differ in
 * presentation on the display.
 */
#define MAP_ASCII7SEG_ALPHANUM			\
	_MAP_0_32_ASCII_SEG7_NON_PRINTABLE	\
	_MAP_33_47_ASCII_SEG7_SYMBOL		\
	_MAP_48_57_ASCII_SEG7_NUMERIC		\
	_MAP_58_64_ASCII_SEG7_SYMBOL		\
	_MAP_65_90_ASCII_SEG7_ALPHA_UPPR	\
	_MAP_91_96_ASCII_SEG7_SYMBOL		\
	_MAP_97_122_ASCII_SEG7_ALPHA_LOWER	\
	_MAP_123_126_ASCII_SEG7_SYMBOL

/* This set tries to map as close as possible to the symbolic characteristics
 * of the ASCII character for maximum discrimination.
 * For now this means all alpha chars are in lower case representations.
 * (This for example facilitates the use of hex numbers with uppercase input.)
 */
#define MAP_ASCII7SEG_ALPHANUM_LC			\
	_MAP_0_32_ASCII_SEG7_NON_PRINTABLE	\
	_MAP_33_47_ASCII_SEG7_SYMBOL		\
	_MAP_48_57_ASCII_SEG7_NUMERIC		\
	_MAP_58_64_ASCII_SEG7_SYMBOL		\
	_MAP_97_122_ASCII_SEG7_ALPHA_LOWER	\
	_MAP_91_96_ASCII_SEG7_SYMBOL		\
	_MAP_97_122_ASCII_SEG7_ALPHA_LOWER	\
	_MAP_123_126_ASCII_SEG7_SYMBOL

#define SEG7_DEFAULT_MAP(_name)		\
	SEG7_CONVERSION_MAP(_name,MAP_ASCII7SEG_ALPHANUM)

#endif	/* MAP_TO_7SEGMENT_H */

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