Piteball
/
android_kernel_samsung_msm8976
mirror of https://github.com/team-infusion-developers/android_kernel_samsung_msm8976.git
1
1
Fork 0
Code Issues Projects Releases Wiki Activity

lib/string.c: remove duplicated function 

commit cd514e727b18ff4d189b8e268db13729a4175091 upstream.

lib/string.c contains two functions, strnicmp and strncasecmp, which do
roughly the same thing, namely compare two strings case-insensitively up
to a given bound.  They have slightly different implementations, but the
only important difference is that strncasecmp doesn't handle len==0
appropriately; it effectively becomes strcasecmp in that case.  strnicmp
correctly says that two strings are always equal in their first 0
characters.

strncasecmp is the POSIX name for this functionality.  So rename the
non-broken function to the standard name.  To minimize the impact on the
rest of the kernel (and since both are exported to modules), make strnicmp
a wrapper for strncasecmp.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Grant Likely <grant.likely@linaro.org>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dan Carpenter <dan.carpenter@oracle.com>
Cc: "H. Peter Anvin" <hpa@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
This commit is contained in:
Rasmus Villemoes 2014-10-13 15:54:25 -07:00 committed by syphyr
parent d8d022e033
commit 6dcc31529a
1 changed files with 10 additions and 17 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
lib/string.c
View File

@ -31,14 +31,14 @@
#include <asm/word-at-a-time.h>
#include <asm/page.h>
#ifndef __HAVE_ARCH_STRNICMP
#ifndef __HAVE_ARCH_STRNCASECMP
/**
* strnicmp - Case insensitive, length-limited string comparison
* strncasecmp - Case insensitive, length-limited string comparison
* @s1: One string
* @s2: The other string
* @len: the maximum number of characters to compare
*/
int strnicmp(const char *s1, const char *s2, size_t len)
int strncasecmp(const char *s1, const char *s2, size_t len)
{
/* Yes, Virginia, it had better be unsigned */
unsigned char c1, c2;
@ -60,6 +60,13 @@ int strnicmp(const char *s1, const char *s2, size_t len)
} while (--len);
return (int)c1 - (int)c2;
}
EXPORT_SYMBOL(strncasecmp);
#endif
#ifndef __HAVE_ARCH_STRNICMP
int strnicmp(const char *s1, const char *s2, size_t len)
{
return strncasecmp(s1, s2, len);
}
EXPORT_SYMBOL(strnicmp);
#endif
@ -77,20 +84,6 @@ int strcasecmp(const char *s1, const char *s2)
EXPORT_SYMBOL(strcasecmp);
#endif
#ifndef __HAVE_ARCH_STRNCASECMP
int strncasecmp(const char *s1, const char *s2, size_t n)
{
int c1, c2;
do {
c1 = tolower(*s1++);
c2 = tolower(*s2++);
} while ((--n > 0) && c1 == c2 && c1 != 0);
return c1 - c2;
}
EXPORT_SYMBOL(strncasecmp);
#endif
#ifndef __HAVE_ARCH_STRCPY
/**
* strcpy - Copy a %NUL terminated string