feature: kmalloc kfree and krealloc are good

libbozo/src/string/memmove.c

@@ -0,0 +1,21 @@
+#include <stddef.h>
+
+void *memmove(void *dest, const void *src, size_t n)
+{
+	size_t i = 0;
+	const char *cast1 = (const char *)src;
+	char *cast2 = (char *)dest;
+
+	if (!cast1 && !cast2 && n > 0)
+		return (0);
+	if (&cast1[0] > &cast2[0]) {
+		while (i < n) {
+			cast2[i] = cast1[i];
+			i++;
+		}
+	} else {
+		while (n--)
+			cast2[n] = cast1[n];
+	}
+	return cast2;
+}

libbozo/src/string/strcpy.c

@@ -0,0 +1,12 @@
+#include <stddef.h>
+
+char *strcpy(char *dest, const char *src)
+{
+	size_t i = 0;
+	if (!src)
+		return NULL;
+	for (; src[i]; i++)
+		dest[i] = src[i];
+	dest[i] = '\0';
+	return dest;
+}