implement:

	memmove()
	puts()
make public:
	putchar()

include/kernel/string.h

@@ -28,6 +28,8 @@ int memcmp(const void *s1, const void *s2, size_t n);
 
 void *memset(void *s, int c, size_t n);
 void *memcpy(void *dest, const void *src, size_t n);
+void *memmove(void *dest, const void *src, size_t n);
+
 char *strcpy(char *dest, const char *src);
 void bzero(void *s, size_t n);
 
@@ -45,5 +47,7 @@ int vprintf(const char *format, va_list ap);
 int vsprintf(char *str, const char *format, va_list ap);
 int vsnprintf(char *str, size_t size, const char *format, va_list ap);
 
+int puts(const char *s);
+int putchar(int c);
 
 #endif /* _KERNEL_STRING_H_ */

lib/string.c

@@ -326,6 +326,53 @@ void *memcpy(void *dest, const void *src, size_t n)
 EXPORT_SYMBOL(memcpy);
 
 
+/**
+ * @brief copy a memory area src that may overlap with area dest
+ *
+ * @param dest the destination memory area
+ * @param src the source memory area
+ * @param n the number of bytes to copy
+ *
+ * @returns a pointer to dest
+ */
+
+void *memmove(void *dest, const void *src, size_t n)
+{
+	char *d;
+
+	const char *s;
+
+	if (dest <= src) {
+
+		d = dest;
+		s = src;
+
+		while (n--) {
+			(*d) = (*s);
+			d++;
+			s++;
+		}
+
+	} else {
+
+		d = dest;
+		d += n;
+
+		s = src;
+		s += n;
+
+		while (n--) {
+			d--;
+			s--;
+			(*d) = (*s);
+		}
+
+	}
+	return dest;
+}
+EXPORT_SYMBOL(memmove);
+
+
 /**
  * @brief copy a '\0' terminated string
  *
@@ -378,6 +425,58 @@ void bzero(void *s, size_t n)
 EXPORT_SYMBOL(bzero);
 
 
+/**
+ * @brief writes the string s and a trailing newline to stdout
+ *
+ * @param str    the destination buffer
+ * @param format the format string buffer
+ * @param ...    arguments to the format string
+ *
+ * @return the number of characters written to buf
+ */
+
+int puts(const char *s)
+{
+	int n;
+
+	n = vsnprintf(NULL, INT_MAX, s, NULL);
+	n+= vsnprintf(NULL, INT_MAX, "\n", NULL);
+
+	return n;
+}
+EXPORT_SYMBOL(puts);
+
+
+/**
+ * @brief  writes the character c, cast to an unsigned char, to stdout
+ *
+ * @param c the character to write
+ *
+ * @return the number of characters written to buf
+ *
+ * FIXME: this must be replaced by a different mechanic, e.g. provided
+ *	  by the architecture or a driver
+ */
+
+int putchar(int c)
+{
+#define TREADY 4
+	static volatile int *console = (int *)0x80000100;
+
+	while (!(console[1] & TREADY));
+
+	console[0] = 0x0ff & c;
+
+	if (c == '\n') {
+		while (!(console[1] & TREADY));
+		console[0] = (int) '\r';
+	}
+
+	return c;
+}
+
+
+
 
 /**
  * @brief print a string into a buffer

lib/vsnprintf.c

@@ -58,27 +58,6 @@ struct fmt_spec {
 };
 
 
-
-#define TREADY 4
-
-static volatile int *console = (int *)0x80000100;
-
-static int putchar(int c)
-{
-	while (!(console[1] & TREADY));
-
-	console[0] = 0x0ff & c;
-
-	if (c == '\n') {
-		while (!(console[1] & TREADY));
-		console[0] = (int) '\r';
-	}
-
-	return c;
-}
-
-
-
 /**
  * @brief print a single character
  *