linux/lib/ucs2_string.c

// SPDX-License-Identifier: GPL-2.0
#include <linux/ucs2_string.h>
#include <linux/module.h>

/* Return the number of unicode characters in data */
unsigned long
ucs2_strnlen(const ucs2_char_t *s, size_t maxlength)
{ … }
EXPORT_SYMBOL(…);

unsigned long
ucs2_strlen(const ucs2_char_t *s)
{ … }
EXPORT_SYMBOL(…);

/*
 * Return the number of bytes is the length of this string
 * Note: this is NOT the same as the number of unicode characters
 */
unsigned long
ucs2_strsize(const ucs2_char_t *data, unsigned long maxlength)
{ … }
EXPORT_SYMBOL(…);

/**
 * ucs2_strscpy() - Copy a UCS2 string into a sized buffer.
 *
 * @dst: Pointer to the destination buffer where to copy the string to.
 * @src: Pointer to the source buffer where to copy the string from.
 * @count: Size of the destination buffer, in UCS2 (16-bit) characters.
 *
 * Like strscpy(), only for UCS2 strings.
 *
 * Copy the source string @src, or as much of it as fits, into the destination
 * buffer @dst. The behavior is undefined if the string buffers overlap. The
 * destination buffer @dst is always NUL-terminated, unless it's zero-sized.
 *
 * Return: The number of characters copied into @dst (excluding the trailing
 * %NUL terminator) or -E2BIG if @count is 0 or @src was truncated due to the
 * destination buffer being too small.
 */
ssize_t ucs2_strscpy(ucs2_char_t *dst, const ucs2_char_t *src, size_t count)
{ … }
EXPORT_SYMBOL(…);

int
ucs2_strncmp(const ucs2_char_t *a, const ucs2_char_t *b, size_t len)
{ … }
EXPORT_SYMBOL(…);

unsigned long
ucs2_utf8size(const ucs2_char_t *src)
{ … }
EXPORT_SYMBOL(…);

/*
 * copy at most maxlength bytes of whole utf8 characters to dest from the
 * ucs2 string src.
 *
 * The return value is the number of characters copied, not including the
 * final NUL character.
 */
unsigned long
ucs2_as_utf8(u8 *dest, const ucs2_char_t *src, unsigned long maxlength)
{ … }
EXPORT_SYMBOL(…);

MODULE_LICENSE(…) …;