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/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_NLS_H
#define _LINUX_NLS_H
/* Unicode has changed over the years. Unicode code points no longer
* fit into 16 bits; as of Unicode 5 valid code points range from 0
* to 0x10ffff (17 planes, where each plane holds 65536 code points).
*
* The original decision to represent Unicode characters as 16-bit
* wchar_t values is now outdated. But plane 0 still includes the
* most commonly used characters, so we will retain it. The newer
* 32-bit unicode_t type can be used when it is necessary to
* represent the full Unicode character set.
*/
/* Plane-0 Unicode character */
typedef u16 wchar_t;
#define MAX_WCHAR_T 0xffff
/* Arbitrary Unicode character */
typedef u32 unicode_t;
/* this value hold the maximum octet of charset */
#define NLS_MAX_CHARSET_SIZE 6 /* for UTF-8 */
/* Byte order for UTF-16 strings */
enum utf16_endian {
UTF16_HOST_ENDIAN,
UTF16_LITTLE_ENDIAN,
UTF16_BIG_ENDIAN
};
/* nls_base.c */
extern int utf8_to_utf32(const u8 *s, int len, unicode_t *pu);
extern int utf8s_to_utf16s(const u8 *s, int len,
enum utf16_endian endian, wchar_t *pwcs, int maxlen);
#endif /* _LINUX_NLS_H */
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