1 files changed, 17 insertions, 15 deletions
diff --git a/hw2/xwrap.h b/hw2/xwrap.h
index 1c0d682..7759ae9 100644
--- a/hw2/xwrap.h
+++ b/hw2/xwrap.h
@@ -5,22 +5,24 @@
 #include <stdlib.h>
 
 #define STATIC_STRLEN(x) (sizeof(x)/sizeof(char) - 1)
+#define ARRAY_LEN(x,t)   (sizeof(x)/sizeof(t))
 
-int   xatol (const char* str, long* result);
-void* xmalloc (size_t size);
-void* xrealloc (void* ptr, size_t size);
-bool  xstrend (const char* str, const char* suffix);
-char* xstrcat (const char* str, ...);
-char* xstrdup (const char* str);
-char* xsprintf (const char* format, ...);
-int   xfaddfd (int fd, int fdflags);
-int   xfdelfd (int fd, int fdflags);
-int   xfaddfl (int fd, int flflags);
-int   xfdelfl (int fd, int flflags);
-char* xreadlink (const char* filename);
-char* xgetcwd (void);
-char* xgetexe (void);
-char* xgetres (const char* filename);
+int     xatol (const char* str, long* result);
+void*   xmalloc (size_t size);
+void*   xrealloc (void* ptr, size_t size);
+bool    xstrend (const char* str, const char* suffix);
+char*   xstrcat (const char* str, ...);
+char*   xstrdup (const char* str);
+char*   xsprintf (const char* format, ...);
+int     xfaddfd (int fd, int fdflags);
+int     xfdelfd (int fd, int fdflags);
+int     xfaddfl (int fd, int flflags);
+int     xfdelfl (int fd, int flflags);
+char*   xreadlink (const char* filename);
+char*   xgetcwd (void);
+char*   xgetexe (void);
+char*   xgetres (const char* filename);
+size_t  xwrite (int fd, const char* str, size_t size);
 
 static inline int xmax (int a, int b) {
 	return a > b ? a : b;