Merge git://oss.sgi.com:8090/xfs/xfs-2.6

[linux-drm-fsl-dcu.git] / lib / string.c

diff --git a/lib/string.c b/lib/string.c
index b3c28a3f63322ff528a38df4895020c257b20050..bab440fb0dfcb99dfe46453350f7b6e9298c89eb 100644 (file)
--- a/lib/string.c
+++ b/lib/string.c
@@ -160,7 +160,7 @@ EXPORT_SYMBOL(strcat);
  * @src: The string to append to it
  * @count: The maximum numbers of bytes to copy
  *
- * Note that in contrast to strncpy, strncat ensures the result is
+ * Note that in contrast to strncpy(), strncat() ensures the result is
  * terminated.
  */
 char *strncat(char *dest, const char *src, size_t count)
@@ -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
@@ -336,8 +366,7 @@ EXPORT_SYMBOL(strnlen);
 
 #ifndef __HAVE_ARCH_STRSPN
 /**
- * strspn - Calculate the length of the initial substring of @s which only
- *     contain letters in @accept
+ * strspn - Calculate the length of the initial substring of @s which only contain letters in @accept
  * @s: The string to be searched
  * @accept: The string to search for
  */
@@ -362,9 +391,9 @@ size_t strspn(const char *s, const char *accept)
 EXPORT_SYMBOL(strspn);
 #endif
 
+#ifndef __HAVE_ARCH_STRCSPN
 /**
- * strcspn - Calculate the length of the initial substring of @s which does
- *     not contain letters in @reject
+ * strcspn - Calculate the length of the initial substring of @s which does not contain letters in @reject
  * @s: The string to be searched
  * @reject: The string to avoid
  */
@@ -384,6 +413,7 @@ size_t strcspn(const char *s, const char *reject)
        return count;
 }
 EXPORT_SYMBOL(strcspn);
+#endif
 
 #ifndef __HAVE_ARCH_STRPBRK
 /**
@@ -403,6 +433,7 @@ char *strpbrk(const char *cs, const char *ct)
        }
        return NULL;
 }
+EXPORT_SYMBOL(strpbrk);
 #endif
 
 #ifndef __HAVE_ARCH_STRSEP
@@ -467,7 +498,7 @@ EXPORT_SYMBOL(memset);
 void *memcpy(void *dest, const void *src, size_t count)
 {
        char *tmp = dest;
-       char *s = src;
+       const char *s = src;
 
        while (count--)
                *tmp++ = *s++;