Commit 01531ac3 authored by BingJing Chang's avatar BingJing Chang Committed by Jan Kara
Browse files

parser: add unsigned int parser 

Will be used by fs parsing options

Link: https://lore.kernel.org/r/20210129045242.10268-1-bingjingc@synology.com


Reviewed-by: default avatarRobbie <Ko&lt;robbieko@synology.com>
Reviewed-by: default avatarChung-Chiang Cheng <cccheng@synology.com>
Signed-off-by: default avatarBingJing Chang <bingjingc@synology.com>
Signed-off-by: default avatarJan Kara <jack@suse.cz>
parent 63c9e47a

include/linux/parser.h

+1 −0
Original line number Diff line number Diff line
@@ -29,6 +29,7 @@ typedef struct { 


int match_token(char *, const match_table_t table, substring_t args[]);

int match_int(substring_t *, int *result);

int match_uint(substring_t *s, unsigned int *result);

int match_u64(substring_t *, u64 *result);

int match_octal(substring_t *, int *result);

int match_hex(substring_t *, int *result);

lib/parser.c

+22 −0
Original line number Diff line number Diff line
@@ -188,6 +188,28 @@ int match_int(substring_t *s, int *result) 
}

EXPORT_SYMBOL(match_int);



/*

 * match_uint - scan a decimal representation of an integer from a substring_t

 * @s: substring_t to be scanned

 * @result: resulting integer on success

 *

 * Description: Attempts to parse the &substring_t @s as a decimal integer. On

 * success, sets @result to the integer represented by the string and returns 0.

 * Returns -ENOMEM, -EINVAL, or -ERANGE on failure.

 */

int match_uint(substring_t *s, unsigned int *result)

{

	int err = -ENOMEM;

	char *buf = match_strdup(s);



	if (buf) {

		err = kstrtouint(buf, 10, result);

		kfree(buf);

	}

	return err;

}

EXPORT_SYMBOL(match_uint);



/**

 * match_u64: - scan a decimal representation of a u64 from

 *                  a substring_t