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[PATCH] strstrip() API

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Add a new strstrip() function to lib/string.c for removing leading and
trailing whitespace from a string.

Cc: Michael Holzheu <holzheu@de.ibm.com>
Acked-by: Ingo Oeser <ioe-lkml@rameria.de>
Acked-by: Joern Engel <joern@wohnheim.fh-wedel.de>
Cc: Corey Minyard <minyard@acm.org>
Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi>
Acked-by: Michael Holzheu <HOLZHEU@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Pekka Enberg 2006-06-23 02:05:44 -07:00 committed by Linus Torvalds
parent 3fa2164d03
commit 481fad4834
2 changed files with 31 additions and 0 deletions
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1
include/linux/string.h
View file

@ -56,6 +56,7 @@ extern char * strnchr(const char *, size_t, int);
#ifndef __HAVE_ARCH_STRRCHR
extern char * strrchr(const char *,int);
#endif
extern char * strstrip(char *);
#ifndef __HAVE_ARCH_STRSTR
extern char * strstr(const char *,const char *);
#endif

30
lib/string.c
View file

@ -301,6 +301,36 @@ char *strnchr(const char *s, size_t count, int c)
EXPORT_SYMBOL(strnchr);
#endif
/**
* strstrip - Removes leading and trailing whitespace from @s.
* @s: The string to be stripped.
*
* Note that the first trailing whitespace is replaced with a %NUL-terminator
* in the given string @s. Returns a pointer to the first non-whitespace
* character in @s.
*/
char *strstrip(char *s)
{
size_t size;
char *end;
size = strlen(s);
if (!size)
return s;
end = s + size - 1;
while (end != s && isspace(*end))
end--;
*(end + 1) = '\0';
while (*s && isspace(*s))
s++;
return s;
}
EXPORT_SYMBOL(strstrip);
#ifndef __HAVE_ARCH_STRLEN
/**
* strlen - Find the length of a string