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| author | Pekka Enberg <penberg@cs.helsinki.fi> | 2006-06-23 13:05:44 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-06-23 18:43:06 +0400 |
| commit | 481fad483487ea967fe20bbc9e565d787f7bf20f (patch) | |
| tree | 3a76336443129975d9f7ba99f9a9ea1c494315e5 | |
| parent | 3fa2164d03fb7af17fcfe4f8800dd754fbd99ff7 (diff) | |
| download | linux-481fad483487ea967fe20bbc9e565d787f7bf20f.tar.xz | |
[PATCH] strstrip() API
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>
| -rw-r--r-- | include/linux/string.h | 1 | ||||
| -rw-r--r-- | lib/string.c | 30 |
2 files changed, 31 insertions, 0 deletions
diff --git a/include/linux/string.h b/include/linux/string.h index c61306da8c52..e4c755860316 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 064f6315b1c3..63077267367e 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 |