Messages in this thread Patch in this message | | | Subject | Re: [PATCH/RFC] s390: Hypervisor File System | From | Pekka Enberg <> | Date | Tue, 25 Apr 2006 11:01:33 +0300 |
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Pekka Enberg <penberg@cs.helsinki.fi> wrote: > > +#ifndef __HAVE_ARCH_STRSTRIP > > +extern char * strstrip(char *); > > +#endif
On Tue, 2006-04-25 at 00:47 -0700, Andrew Morton wrote: > Do we really need this gunk? It's not as if strstrip() is so super > performance-sensitive that anyone would go and write a hand-tuned assembly > version?
I guess not. I added it for consistency, but whatever makes you happy Andrew :)
Pekka
diff --git a/include/linux/string.h b/include/linux/string.h index c61306d..e4c7558 100644 --- a/include/linux/string.h +++ b/include/linux/string.h @@ -56,6 +56,7 @@ #endif #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 diff --git a/lib/string.c b/lib/string.c index 064f631..6307726 100644 --- a/lib/string.c +++ b/lib/string.c @@ -301,6 +301,36 @@ char *strnchr(const char *s, size_t coun 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
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