From 481fad483487ea967fe20bbc9e565d787f7bf20f Mon Sep 17 00:00:00 2001 From: Pekka Enberg Date: Fri, 23 Jun 2006 02:05:44 -0700 Subject: [PATCH] strstrip() API Add a new strstrip() function to lib/string.c for removing leading and trailing whitespace from a string. Cc: Michael Holzheu Acked-by: Ingo Oeser Acked-by: Joern Engel Cc: Corey Minyard Signed-off-by: Pekka Enberg Acked-by: Michael Holzheu Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/string.h | 1 + lib/string.c | 30 ++++++++++++++++++++++++++++++ 2 files changed, 31 insertions(+) diff --git a/include/linux/string.h b/include/linux/string.h index c61306da8c5256..e4c7558603167b 100644 --- a/include/linux/string.h +++ b/include/linux/string.h @@ -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 diff --git a/lib/string.c b/lib/string.c index 064f6315b1c3e1..63077267367ea0 100644 --- a/lib/string.c +++ b/lib/string.c @@ -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 -- cgit 1.2.3-korg