X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=lib%2Fstring.c;h=a485d75962af5f7a6bbb4f819aa780c812fe25ca;hb=a2f44b27303a5353859d77a3e96a1d3f33f56ab7;hp=603c7174f41e9695eafdb050b678eddf6e5b2a7e;hpb=bc77d24c47b89f1e0efed0b8e4be5f8aad102883;p=linux-2.6.git

diff --git a/lib/string.c b/lib/string.c
index 603c7174f..a485d7596 100644
--- a/lib/string.c
+++ b/lib/string.c
@@ -19,8 +19,6 @@
  * -  Kissed strtok() goodbye
  */
 
-#define IN_STRING_C 1
- 
 #include <linux/types.h>
 #include <linux/string.h>
 #include <linux/ctype.h>
@@ -38,11 +36,13 @@ 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; c2 = *s2;
-			s1++; s2++;
+			c1 = *s1;
+			c2 = *s2;
+			s1++;
+			s2++;
 			if (!c1)
 				break;
 			if (!c2)
@@ -57,7 +57,6 @@ int strnicmp(const char *s1, const char *s2, size_t len)
 	}
 	return (int)c1 - (int)c2;
 }
-
 EXPORT_SYMBOL(strnicmp);
 #endif
 
@@ -67,7 +66,8 @@ EXPORT_SYMBOL(strnicmp);
  * @dest: Where to copy the string to
  * @src: Where to copy the string from
  */
-char * strcpy(char * dest,const char *src)
+#undef strcpy
+char *strcpy(char *dest, const char *src)
 {
 	char *tmp = dest;
 
@@ -75,6 +75,7 @@ char * strcpy(char * dest,const char *src)
 		/* nothing */;
 	return tmp;
 }
+EXPORT_SYMBOL(strcpy);
 #endif
 
 #ifndef __HAVE_ARCH_STRNCPY
@@ -86,18 +87,24 @@ char * strcpy(char * dest,const char *src)
  *
  * The result is not %NUL-terminated if the source exceeds
  * @count bytes.
+ *
+ * In the case where the length of @src is less than  that  of
+ * count, the remainder of @dest will be padded with %NUL.
+ *
  */
-char * strncpy(char * dest,const char *src,size_t count)
+char *strncpy(char *dest, const char *src, size_t count)
 {
 	char *tmp = dest;
 
 	while (count) {
-		if ((*tmp = *src) != 0) src++;
+		if ((*tmp = *src) != 0)
+			src++;
 		tmp++;
 		count--;
 	}
 	return dest;
 }
+EXPORT_SYMBOL(strncpy);
 #endif
 
 #ifndef __HAVE_ARCH_STRLCPY
@@ -117,7 +124,7 @@ size_t strlcpy(char *dest, const char *src, size_t size)
 	size_t ret = strlen(src);
 
 	if (size) {
-		size_t len = (ret >= size) ? size-1 : ret;
+		size_t len = (ret >= size) ? size - 1 : ret;
 		memcpy(dest, src, len);
 		dest[len] = '\0';
 	}
@@ -132,7 +139,8 @@ EXPORT_SYMBOL(strlcpy);
  * @dest: The string to be appended to
  * @src: The string to append to it
  */
-char * strcat(char * dest, const char * src)
+#undef strcat
+char *strcat(char *dest, const char *src)
 {
 	char *tmp = dest;
 
@@ -140,9 +148,9 @@ char * strcat(char * dest, const char * src)
 		dest++;
 	while ((*dest++ = *src++) != '\0')
 		;
-
 	return tmp;
 }
+EXPORT_SYMBOL(strcat);
 #endif
 
 #ifndef __HAVE_ARCH_STRNCAT
@@ -155,23 +163,23 @@ char * strcat(char * dest, const char * src)
  * Note that in contrast to strncpy, strncat ensures the result is
  * terminated.
  */
-char * strncat(char *dest, const char *src, size_t count)
+char *strncat(char *dest, const char *src, size_t count)
 {
 	char *tmp = dest;
 
 	if (count) {
 		while (*dest)
 			dest++;
-		while ((*dest++ = *src++)) {
+		while ((*dest++ = *src++) != 0) {
 			if (--count == 0) {
 				*dest = '\0';
 				break;
 			}
 		}
 	}
-
 	return tmp;
 }
+EXPORT_SYMBOL(strncat);
 #endif
 
 #ifndef __HAVE_ARCH_STRLCAT
@@ -207,17 +215,18 @@ EXPORT_SYMBOL(strlcat);
  * @cs: One string
  * @ct: Another string
  */
-int strcmp(const char * cs,const char * ct)
+#undef strcmp
+int strcmp(const char *cs, const char *ct)
 {
-	register signed char __res;
+	signed char __res;
 
 	while (1) {
 		if ((__res = *cs - *ct++) != 0 || !*cs++)
 			break;
 	}
-
 	return __res;
 }
+EXPORT_SYMBOL(strcmp);
 #endif
 
 #ifndef __HAVE_ARCH_STRNCMP
@@ -227,18 +236,18 @@ int strcmp(const char * cs,const char * ct)
  * @ct: Another string
  * @count: The maximum number of bytes to compare
  */
-int strncmp(const char * cs,const char * ct,size_t count)
+int strncmp(const char *cs, const char *ct, size_t count)
 {
-	register signed char __res = 0;
+	signed char __res = 0;
 
 	while (count) {
 		if ((__res = *cs - *ct++) != 0 || !*cs++)
 			break;
 		count--;
 	}
-
 	return __res;
 }
+EXPORT_SYMBOL(strncmp);
 #endif
 
 #ifndef __HAVE_ARCH_STRCHR
@@ -247,13 +256,14 @@ int strncmp(const char * cs,const char * ct,size_t count)
  * @s: The string to be searched
  * @c: The character to search for
  */
-char * strchr(const char * s, int c)
+char *strchr(const char *s, int c)
 {
-	for(; *s != (char) c; ++s)
+	for (; *s != (char)c; ++s)
 		if (*s == '\0')
 			return NULL;
-	return (char *) s;
+	return (char *)s;
 }
+EXPORT_SYMBOL(strchr);
 #endif
 
 #ifndef __HAVE_ARCH_STRRCHR
@@ -262,7 +272,7 @@ char * strchr(const char * s, int c)
  * @s: The string to be searched
  * @c: The character to search for
  */
-char * strrchr(const char * s, int c)
+char *strrchr(const char *s, int c)
 {
        const char *p = s + strlen(s);
        do {
@@ -271,6 +281,7 @@ char * strrchr(const char * s, int c)
        } while (--p >= s);
        return NULL;
 }
+EXPORT_SYMBOL(strrchr);
 #endif
 
 #ifndef __HAVE_ARCH_STRNCHR
@@ -283,18 +294,49 @@ char * strrchr(const char * s, int c)
 char *strnchr(const char *s, size_t count, int c)
 {
 	for (; count-- && *s != '\0'; ++s)
-		if (*s == (char) c)
-			return (char *) s;
+		if (*s == (char)c)
+			return (char *)s;
 	return NULL;
 }
+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
  * @s: The string to be sized
  */
-size_t strlen(const char * s)
+size_t strlen(const char *s)
 {
 	const char *sc;
 
@@ -302,6 +344,7 @@ size_t strlen(const char * s)
 		/* nothing */;
 	return sc - s;
 }
+EXPORT_SYMBOL(strlen);
 #endif
 
 #ifndef __HAVE_ARCH_STRNLEN
@@ -310,7 +353,7 @@ size_t strlen(const char * s)
  * @s: The string to be sized
  * @count: The maximum number of bytes to search
  */
-size_t strnlen(const char * s, size_t count)
+size_t strnlen(const char *s, size_t count)
 {
 	const char *sc;
 
@@ -318,6 +361,7 @@ size_t strnlen(const char * s, size_t count)
 		/* nothing */;
 	return sc - s;
 }
+EXPORT_SYMBOL(strnlen);
 #endif
 
 #ifndef __HAVE_ARCH_STRSPN
@@ -342,13 +386,13 @@ size_t strspn(const char *s, const char *accept)
 			return count;
 		++count;
 	}
-
 	return count;
 }
 
 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
@@ -368,9 +412,10 @@ size_t strcspn(const char *s, const char *reject)
 		}
 		++count;
 	}
-
 	return count;
-}	
+}
+EXPORT_SYMBOL(strcspn);
+#endif
 
 #ifndef __HAVE_ARCH_STRPBRK
 /**
@@ -378,18 +423,19 @@ size_t strcspn(const char *s, const char *reject)
  * @cs: The string to be searched
  * @ct: The characters to search for
  */
-char * strpbrk(const char * cs,const char * ct)
+char *strpbrk(const char *cs, const char *ct)
 {
-	const char *sc1,*sc2;
+	const char *sc1, *sc2;
 
-	for( sc1 = cs; *sc1 != '\0'; ++sc1) {
-		for( sc2 = ct; *sc2 != '\0'; ++sc2) {
+	for (sc1 = cs; *sc1 != '\0'; ++sc1) {
+		for (sc2 = ct; *sc2 != '\0'; ++sc2) {
 			if (*sc1 == *sc2)
-				return (char *) sc1;
+				return (char *)sc1;
 		}
 	}
 	return NULL;
 }
+EXPORT_SYMBOL(strpbrk);
 #endif
 
 #ifndef __HAVE_ARCH_STRSEP
@@ -404,9 +450,10 @@ char * strpbrk(const char * cs,const char * ct)
  * of that name. In fact, it was stolen from glibc2 and de-fancy-fied.
  * Same semantics, slimmer shape. ;)
  */
-char * strsep(char **s, const char *ct)
+char *strsep(char **s, const char *ct)
 {
-	char *sbegin = *s, *end;
+	char *sbegin = *s;
+	char *end;
 
 	if (sbegin == NULL)
 		return NULL;
@@ -415,10 +462,8 @@ char * strsep(char **s, const char *ct)
 	if (end)
 		*end++ = '\0';
 	*s = end;
-
 	return sbegin;
 }
-
 EXPORT_SYMBOL(strsep);
 #endif
 
@@ -431,38 +476,15 @@ EXPORT_SYMBOL(strsep);
  *
  * Do not use memset() to access IO space, use memset_io() instead.
  */
-void * memset(void * s,int c,size_t count)
+void *memset(void *s, int c, size_t count)
 {
-	char *xs = (char *) s;
+	char *xs = s;
 
 	while (count--)
 		*xs++ = c;
-
 	return s;
 }
-#endif
-
-#ifndef __HAVE_ARCH_BCOPY
-/**
- * bcopy - Copy one area of memory to another
- * @srcp: Where to copy from
- * @destp: Where to copy to
- * @count: The size of the area.
- *
- * Note that this is the same as memcpy(), with the arguments reversed.
- * memcpy() is the standard, bcopy() is a legacy BSD function.
- *
- * You should not use this function to access IO space, use memcpy_toio()
- * or memcpy_fromio() instead.
- */
-void bcopy(const void * srcp, void * destp, size_t count)
-{
-	const char *src = srcp;
-	char *dest = destp;
-
-	while (count--)
-		*dest++ = *src++;
-}
+EXPORT_SYMBOL(memset);
 #endif
 
 #ifndef __HAVE_ARCH_MEMCPY
@@ -475,15 +497,16 @@ void bcopy(const void * srcp, void * destp, size_t count)
  * You should not use this function to access IO space, use memcpy_toio()
  * or memcpy_fromio() instead.
  */
-void * memcpy(void * dest,const void *src,size_t count)
+void *memcpy(void *dest, const void *src, size_t count)
 {
-	char *tmp = (char *) dest, *s = (char *) src;
+	char *tmp = dest;
+	const char *s = src;
 
 	while (count--)
 		*tmp++ = *s++;
-
 	return dest;
 }
+EXPORT_SYMBOL(memcpy);
 #endif
 
 #ifndef __HAVE_ARCH_MEMMOVE
@@ -495,25 +518,27 @@ void * memcpy(void * dest,const void *src,size_t count)
  *
  * Unlike memcpy(), memmove() copes with overlapping areas.
  */
-void * memmove(void * dest,const void *src,size_t count)
+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;
+	} else {
+		tmp = dest;
+		tmp += count;
+		s = src;
+		s += count;
 		while (count--)
 			*--tmp = *--s;
-		}
-
+	}
 	return dest;
 }
+EXPORT_SYMBOL(memmove);
 #endif
 
 #ifndef __HAVE_ARCH_MEMCMP
@@ -523,16 +548,18 @@ void * memmove(void * dest,const void *src,size_t count)
  * @ct: Another area of memory
  * @count: The size of the area.
  */
-int memcmp(const void * cs,const void * ct,size_t count)
+#undef memcmp
+int memcmp(const void *cs, const void *ct, size_t count)
 {
 	const unsigned char *su1, *su2;
 	int res = 0;
 
-	for( su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
+	for (su1 = cs, su2 = ct; 0 < count; ++su1, ++su2, count--)
 		if ((res = *su1 - *su2) != 0)
 			break;
 	return res;
 }
+EXPORT_SYMBOL(memcmp);
 #endif
 
 #ifndef __HAVE_ARCH_MEMSCAN
@@ -545,18 +572,19 @@ int memcmp(const void * cs,const void * ct,size_t count)
  * returns the address of the first occurrence of @c, or 1 byte past
  * the area if @c is not found
  */
-void * memscan(void * addr, int c, size_t size)
+void *memscan(void *addr, int c, size_t size)
 {
-	unsigned char * p = (unsigned char *) addr;
+	unsigned char *p = addr;
 
 	while (size) {
 		if (*p == c)
-			return (void *) p;
+			return (void *)p;
 		p++;
 		size--;
 	}
-  	return (void *) p;
+  	return (void *)p;
 }
+EXPORT_SYMBOL(memscan);
 #endif
 
 #ifndef __HAVE_ARCH_STRSTR
@@ -565,22 +593,23 @@ void * memscan(void * addr, int c, size_t size)
  * @s1: The string to be searched
  * @s2: The string to search for
  */
-char * strstr(const char * s1,const char * s2)
+char *strstr(const char *s1, const char *s2)
 {
 	int l1, l2;
 
 	l2 = strlen(s2);
 	if (!l2)
-		return (char *) s1;
+		return (char *)s1;
 	l1 = strlen(s1);
 	while (l1 >= l2) {
 		l1--;
-		if (!memcmp(s1,s2,l2))
-			return (char *) s1;
+		if (!memcmp(s1, s2, l2))
+			return (char *)s1;
 		s1++;
 	}
 	return NULL;
 }
+EXPORT_SYMBOL(strstr);
 #endif
 
 #ifndef __HAVE_ARCH_MEMCHR
@@ -598,10 +627,10 @@ void *memchr(const void *s, int c, size_t n)
 	const unsigned char *p = s;
 	while (n-- != 0) {
         	if ((unsigned char)c == *p++) {
-			return (void *)(p-1);
+			return (void *)(p - 1);
 		}
 	}
 	return NULL;
 }
-
+EXPORT_SYMBOL(memchr);
 #endif