X-Git-Url: http://ftp.safe.ca/?a=blobdiff_plain;f=lib%2Fstring.c;h=b19b87af65a3553a0650d679cabfac9fecd4eb3b;hb=a4455be0850009f5da9a3b82523079922cd4b26e;hp=542829742c85f28c7a160e4eb63616428bf71d83;hpb=cc75fb71c0100d921637a11ded5e333883be5df3;p=safe%2Fjmp%2Flinux-2.6

diff --git a/lib/string.c b/lib/string.c
index 5428297..b19b87a 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -36,7 +36,7 @@ int strnicmp(const char *s1, const char *s2, size_t len)
 	/* Yes, Virginia, it had better be unsigned */
 	unsigned char c1, c2;
 
-	c1 = 0;	c2 = 0;
+	c1 = c2 = 0;
 	if (len) {
 		do {
 			c1 = *s1;
@@ -60,6 +60,34 @@ int strnicmp(const char *s1, const char *s2, size_t len)
 EXPORT_SYMBOL(strnicmp);
 #endif
 
+#ifndef __HAVE_ARCH_STRCASECMP
+int strcasecmp(const char *s1, const char *s2)
+{
+	int c1, c2;
+
+	do {
+		c1 = tolower(*s1++);
+		c2 = tolower(*s2++);
+	} while (c1 == c2 && c1 != 0);
+	return c1 - c2;
+}
+EXPORT_SYMBOL(strcasecmp);
+#endif
+
+#ifndef __HAVE_ARCH_STRNCASECMP
+int strncasecmp(const char *s1, const char *s2, size_t n)
+{
+	int c1, c2;
+
+	do {
+		c1 = tolower(*s1++);
+		c2 = tolower(*s2++);
+	} while ((--n > 0) && c1 == c2 && c1 != 0);
+	return c1 - c2;
+}
+EXPORT_SYMBOL(strncasecmp);
+#endif
+
 #ifndef __HAVE_ARCH_STRCPY
 /**
  * strcpy - Copy a %NUL terminated string
@@ -148,7 +176,6 @@ char *strcat(char *dest, const char *src)
 		dest++;
 	while ((*dest++ = *src++) != '\0')
 		;
-
 	return tmp;
 }
 EXPORT_SYMBOL(strcat);
@@ -161,7 +188,7 @@ 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)
@@ -302,6 +329,36 @@ 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
@@ -337,8 +394,7 @@ 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
  */
@@ -363,9 +419,9 @@ 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
  */
@@ -385,6 +441,7 @@ size_t strcspn(const char *s, const char *reject)
 	return count;
 }
 EXPORT_SYMBOL(strcspn);
+#endif
 
 #ifndef __HAVE_ARCH_STRPBRK
 /**
@@ -436,6 +493,33 @@ char *strsep(char **s, const char *ct)
 EXPORT_SYMBOL(strsep);
 #endif
 
+/**
+ * sysfs_streq - return true if strings are equal, modulo trailing newline
+ * @s1: one string
+ * @s2: another string
+ *
+ * This routine returns true iff two strings are equal, treating both
+ * NUL and newline-then-NUL as equivalent string terminations.  It's
+ * geared for use with sysfs input strings, which generally terminate
+ * with newlines but are compared against values without newlines.
+ */
+bool sysfs_streq(const char *s1, const char *s2)
+{
+	while (*s1 && *s1 == *s2) {
+		s1++;
+		s2++;
+	}
+
+	if (*s1 == *s2)
+		return true;
+	if (!*s1 && *s2 == '\n' && !s2[1])
+		return true;
+	if (*s1 == '\n' && !s1[1] && !*s2)
+		return true;
+	return false;
+}
+EXPORT_SYMBOL(sysfs_streq);
+
 #ifndef __HAVE_ARCH_MEMSET
 /**
  * memset - Fill a region of memory with the given value
@@ -447,7 +531,7 @@ EXPORT_SYMBOL(strsep);
  */
 void *memset(void *s, int c, size_t count)
 {
-	char *xs = (char *)s;
+	char *xs = s;
 
 	while (count--)
 		*xs++ = c;
@@ -468,8 +552,8 @@ EXPORT_SYMBOL(memset);
  */
 void *memcpy(void *dest, const void *src, size_t count)
 {
-	char *tmp = (char *)dest;
-	char *s = (char *)src;
+	char *tmp = dest;
+	const char *s = src;
 
 	while (count--)
 		*tmp++ = *s++;
@@ -489,16 +573,19 @@ EXPORT_SYMBOL(memcpy);
  */
 void *memmove(void *dest, const void *src, size_t count)
 {
-	char *tmp, *s;
+	char *tmp;
+	const char *s;
 
 	if (dest <= src) {
-		tmp = (char *)dest;
-		s = (char *)src;
+		tmp = dest;
+		s = src;
 		while (count--)
 			*tmp++ = *s++;
 	} else {
-		tmp = (char *)dest + count;
-		s = (char *)src + count;
+		tmp = dest;
+		tmp += count;
+		s = src;
+		s += count;
 		while (count--)
 			*--tmp = *--s;
 	}
@@ -540,7 +627,7 @@ EXPORT_SYMBOL(memcmp);
  */
 void *memscan(void *addr, int c, size_t size)
 {
-	unsigned char *p = (unsigned char *)addr;
+	unsigned char *p = addr;
 
 	while (size) {
 		if (*p == c)