hw2 done

lib/string.c

@@ -16,11 +16,30 @@ int strcmp(const char *a, const char *b)
   return 1;
 }
 
+char *strcpy(char *destination, const char *source)
+{
+  char *ret = destination;
+  while (*source != '\0')
+    *destination++ = *source++;
+  *destination = '\0';
+  
+  return ret;
+}
+
+size_t strlen(const char *str)
+{
+  size_t ret = 0;
+  while (*str != '\0')
+    ++ret, ++str;
+
+  return ret;
+}
+
 void *memcpy(void *dest, const void *src, size_t count)
 {
   void *ret = dest;
-  for (const byte_t *p = src; count > 0; --count, ++p, ++dest)
-    *(byte_t *)dest = *p;
+  for (const uint8_t *p = src; count > 0; --count, ++p, ++dest)
+    *(uint8_t *)dest = *p;
 
   return ret;
 }
@@ -28,7 +47,7 @@ void *memcpy(void *dest, const void *src, size_t count)
 void *memzero(void *start, void *end)
 {
   void *ret = start;
-  for (byte_t *p = start; p < (byte_t *)end; ++p)
+  for (uint8_t *p = start; p < (uint8_t *)end; ++p)
     *p = 0;
   
   return ret;