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Date: Tue, 3 Jul 2018 13:06:49 -0400 From: Gabriel Krisman Bertazi <krisman@...labora.co.uk> To: tytso@....edu Cc: linux-ext4@...r.kernel.org, darrick.wong@...cle.com, kernel@...labora.com, Gabriel Krisman Bertazi <krisman@...labora.co.uk> Subject: [PATCH 09/20] nls: Add optional normalization and casefold hooks Signed-off-by: Gabriel Krisman Bertazi <krisman@...labora.co.uk> --- include/linux/nls.h | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) diff --git a/include/linux/nls.h b/include/linux/nls.h index deca7367feb8..7f95a1bd8e1f 100644 --- a/include/linux/nls.h +++ b/include/linux/nls.h @@ -4,6 +4,7 @@ #include <linux/init.h> #include <linux/string.h> +#include <linux/errno.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 @@ -38,7 +39,12 @@ struct nls_ops { unsigned int c); unsigned char (*uppercase)(const struct nls_table *charset, unsigned int c); - + int (*casefold)(const struct nls_table *charset, + const unsigned char *str, size_t len, + unsigned char *dest, size_t dlen); + int (*normalize)(const struct nls_table *charset, + const unsigned char *str, size_t len, + unsigned char *dest, size_t dlen); }; struct nls_table { @@ -157,6 +163,26 @@ static inline int nls_strnicmp(struct nls_table *t, const unsigned char *s1, return nls_strncasecmp(t, s1, len, s2, len); } +static inline int nls_casefold(const struct nls_table *charset, + const unsigned char *str, size_t len, + unsigned char *dest, size_t dlen) +{ + if (charset->ops->casefold) + return charset->ops->casefold(charset, str, len, dest, dlen); + + return -ENOTSUPP; +} + +static inline int nls_normalize(const struct nls_table *charset, + const unsigned char *str, size_t len, + unsigned char *dest, size_t dlen) +{ + if (charset->ops->normalize) + return charset->ops->normalize(charset, str, len, dest, dlen); + + return -ENOTSUPP; +} + /* * nls_nullsize - return length of null character for codepage * @codepage - codepage for which to return length of NULL terminator -- 2.18.0
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