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lib/string_helpers: Introduce string_upper() and string_lower() helpers

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[ Upstream commit 58eeba0bdb52afe5c18ce2a760ca9fe2901943e9 ]

Provide the helpers for string conversions to upper and lower cases.

Signed-off-by: Vadim Pasternak <vadimp@mellanox.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Stable-dep-of: 3c0f4f09c063 ("usb: gadget: u_ether: Fix host MAC address case")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Vadim Pasternak 2020-07-14 15:01:53 +03:00 committed by Greg Kroah-Hartman
parent 7e15602c50
commit c8489e0fab
1 changed files with 15 additions and 0 deletions
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15
include/linux/string_helpers.h
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@ -2,6 +2,7 @@
#ifndef _LINUX_STRING_HELPERS_H_
#define _LINUX_STRING_HELPERS_H_
#include <linux/ctype.h>
#include <linux/types.h>
struct file;
@ -75,6 +76,20 @@ static inline int string_escape_str_any_np(const char *src, char *dst,
return string_escape_str(src, dst, sz, ESCAPE_ANY_NP, only);
}
static inline void string_upper(char *dst, const char *src)
{
do {
*dst++ = toupper(*src);
} while (*src++);
}
static inline void string_lower(char *dst, const char *src)
{
do {
*dst++ = tolower(*src);
} while (*src++);
}
char *kstrdup_quotable(const char *src, gfp_t gfp);
char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp);
char *kstrdup_quotable_file(struct file *file, gfp_t gfp);