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lib/charset: add u16_strlcat() function

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Provide u16 string version of strlcat().

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Reviewed-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
This commit is contained in:
Masahisa Kojima 2022-04-28 17:09:34 +09:00 • committed by Heinrich Schuchardt
parent d30924f16b
commit eca08ce94c
2 changed files with 30 additions and 0 deletions
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16
lib/charset.c
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@ -416,6 +416,22 @@ u16 *u16_strdup(const void *src)
return new;
}
size_t u16_strlcat(u16 *dest, const u16 *src, size_t count)
{
size_t destlen = u16_strlen(dest);
size_t srclen = u16_strlen(src);
size_t ret = destlen + srclen + 1;
if (destlen >= count)
return ret;
if (ret > count)
srclen -= ret - count;
memcpy(&dest[destlen], src, 2 * srclen);
dest[destlen + srclen] = 0x0000;
return ret;
}
/* Convert UTF-16 to UTF-8. */
uint8_t *utf16_to_utf8(uint8_t *dest, const uint16_t *src, size_t size)
{