memcpy() + memset(); Makefile for libc

libc/Makefile

@@ -0,0 +1,53 @@
+include ../config.mk
+
+AR=ar
+ARFLAGS=rcs
+
+LIBC_OBJECTS=			\
+	string/ffs.o		\
+	string/ffsl.o		\
+	string/ffsll.o		\
+	string/memccpy.o	\
+	string/memchr.o		\
+	string/memcmp.o		\
+	string/memcpy.o		\
+	string/memmove.o	\
+	string/memrchr.o	\
+	string/memset.o		\
+	string/stpcpy.o		\
+	string/stpncpy.o	\
+	string/strcat.o		\
+	string/strchr.o		\
+	string/strchrnul.o	\
+	string/strcmp.o		\
+	string/strcoll.o	\
+	string/strcpy.o		\
+	string/strcspn.o	\
+	string/stresep.o	\
+	string/strlcat.o	\
+	string/strlcpy.o	\
+	string/strlen.o		\
+	string/strncat.o	\
+	string/strncmp.o	\
+	string/strncpy.o	\
+	string/strnlen.o	\
+	string/strpbrk.o	\
+	string/strrchr.o	\
+	string/strsep.o		\
+	string/strspn.o		\
+	string/strstr.o		\
+	string/strtok_r.o	\
+	string/strxfrm.o	\
+	# end of source list
+
+libc.a: $(LIBC_OBJECTS)
+	$(AR) $(ARFLAGS) $@ $(LIBC_OBJECTS)
+
+.c.o: string.h
+	$(CC) $(CFLAGS) -c -o $@ $(@:.o=.c) $(CPPFLAGS)
+
+clean:
+	rm -f $(LIBC_OBJECTS)
+	rm -f libc.a
+
+.PHONY: clean

libc/string/memcpy.c

@@ -0,0 +1,10 @@
+#include <string.h>
+
+void *memcpy(void *dest, const void *src, size_t n) {
+    unsigned char *d = dest;
+    const unsigned char *s = src;
+    for (size_t i = 0; i < n; i++) {
+        d[i] = s[i];
+    }
+    return dest;
+}

libc/string/memset.c

@@ -0,0 +1,9 @@
+#include <string.h>
+
+void *memset(void *ptr, int value, size_t num) {
+    unsigned char *byte_ptr = ptr;
+    for (size_t i = 0; i < num; i++) {
+        byte_ptr[i] = (unsigned char)value;
+    }
+    return ptr;
+}