Pass size_t instead of word values to GC_malloc in hugetest

(refactoring)

Issue #627 (bdwgc).

* tests/huge.c (GC_WORD_MAX): Rename to SIZE_MAX; change its type from
GC_word to size_t.
* tests/huge.c (SIZE_MAX): Undefine it (before definition).
* tests/huge.c (GC_SWORD_MAX): Rename to U_SSIZE_MAX; change type from
GC_signed_word to size_t (unsigned).
* tests/huge.c (main): Rename GC_WORD_MAX to SIZE_MAX; rename
GC_SWORD_MAX to U_SSIZE_MAX.

tests/huge.c

@@ -43,25 +43,26 @@
     } \
   } while (0)
 
-#define GC_WORD_MAX ((GC_word)-1)
-#define GC_SWORD_MAX ((GC_signed_word)(GC_WORD_MAX >> 1))
+#undef SIZE_MAX
+#define SIZE_MAX (~(size_t)0)
+
+#define U_SSIZE_MAX (SIZE_MAX >> 1) /* unsigned */
 
 int main(void)
 {
   GC_INIT();
 
-  CHECK_ALLOC_FAILED(GC_MALLOC(GC_SWORD_MAX - 1024), "SWORD_MAX-1024");
-  CHECK_ALLOC_FAILED(GC_MALLOC(GC_SWORD_MAX), "SWORD_MAX");
+  CHECK_ALLOC_FAILED(GC_MALLOC(U_SSIZE_MAX - 1024), "SSIZE_MAX-1024");
+  CHECK_ALLOC_FAILED(GC_MALLOC(U_SSIZE_MAX), "SSIZE_MAX");
   /* Skip other checks to avoid "exceeds maximum object size" gcc warning. */
 # if !defined(_FORTIFY_SOURCE)
-    CHECK_ALLOC_FAILED(GC_MALLOC((GC_word)GC_SWORD_MAX + 1), "SWORD_MAX+1");
-    CHECK_ALLOC_FAILED(GC_MALLOC((GC_word)GC_SWORD_MAX + 1024),
-                       "SWORD_MAX+1024");
-    CHECK_ALLOC_FAILED(GC_MALLOC(GC_WORD_MAX - 1024), "WORD_MAX-1024");
-    CHECK_ALLOC_FAILED(GC_MALLOC(GC_WORD_MAX - 16), "WORD_MAX-16");
-    CHECK_ALLOC_FAILED(GC_MALLOC(GC_WORD_MAX - 8), "WORD_MAX-8");
-    CHECK_ALLOC_FAILED(GC_MALLOC(GC_WORD_MAX - 4), "WORD_MAX-4");
-    CHECK_ALLOC_FAILED(GC_MALLOC(GC_WORD_MAX), "WORD_MAX");
+    CHECK_ALLOC_FAILED(GC_MALLOC(U_SSIZE_MAX + 1), "SSIZE_MAX+1");
+    CHECK_ALLOC_FAILED(GC_MALLOC(U_SSIZE_MAX + 1024), "SSIZE_MAX+1024");
+    CHECK_ALLOC_FAILED(GC_MALLOC(SIZE_MAX - 1024), "SIZE_MAX-1024");
+    CHECK_ALLOC_FAILED(GC_MALLOC(SIZE_MAX - 16), "SIZE_MAX-16");
+    CHECK_ALLOC_FAILED(GC_MALLOC(SIZE_MAX - 8), "SIZE_MAX-8");
+    CHECK_ALLOC_FAILED(GC_MALLOC(SIZE_MAX - 4), "SIZE_MAX-4");
+    CHECK_ALLOC_FAILED(GC_MALLOC(SIZE_MAX), "SIZE_MAX");
 # endif
   printf("SUCCEEDED\n");
   return 0;