Added memory size defines

include/mem.h

@@ -7,6 +7,10 @@
 #define SIZEOF(x)    (ptrdiff_t)sizeof(x)
 #define NELEMS(a)   (sizeof(a) / sizeof(*(a)))
 #define LEN(s)  (NELEMS(s) - 1)
+#define KB(x) ((size_t)(x) << 10)  // 1 KB = 1024 bytes
+#define MB(x) ((size_t)(x) << 20)  // 1 MB = 1024 * 1024 bytes
+#define GB(x) ((size_t)(x) << 30)  // 1 GB = 1024 * 1024 * 1024 bytes
+
 
 extern const Exception out_of_memory; // OOM Exception 
 extern void *mem_alloc (size_t nbytes,const char *file, int line);

tests/01_alloc.c

@@ -20,7 +20,7 @@ static bool isZeroed(void *memory, unsigned int size)
 
 int main(void){
     
-    char *buf = ALLOC(BUFSZ);
+    char *buf = ALLOC(MB(20));
     ASSERTED(buf != NULL);
     ASSERTED(isZeroed(buf, BUFSZ) == false);
     FREE(buf);